JB/T 5358-1991 General technical requirements for rotor die casting machines
Some standard content:
Mechanical Industry Standard of the People's Republic of China
General Technical Requirements for Rotor Die-casting Machines
1 Subject Content and Scope of Application
JB/T5358—1991
This standard specifies the general technical requirements, test methods and inspection rules, as well as packaging marking and transportation of rotor die-casting machines. This standard applies to special cold chamber die-casting machines (hereinafter referred to as rotor die-casting machines) that use mineral oil as the transmission medium and are used for die-casting cage rotors of motors. Other types of rotor die-casting machines should also be used for reference. 2 Reference standards
GB3766
GB2348
GB7935
ZBJ50014
ZBJ50013
JB1471
JB1469
JB1470
ZBK90001
JB/GQ3004
General technical conditions for hydraulic systems
Inner cylinder of hydraulic cylinder Diameter and piston rod outer diameter series packaging storage and transportation graphic signs
General technical conditions for hydraulic components
Technical conditions for machine tool packaging
Technical conditions for machine tool anti-rust
Technical conditions for export machine tool packaging
Technical conditions for export machine tool anti-rust
Technical conditions for export machine tool painting
Product signs
Special electrical equipment
Special electrical equipment
Special electrical equipment||tt| |Electrical equipment for special purpose
Electrical equipment for special purpose
Electrical equipment for special purpose
Electrical equipment for special purpose
Electrical equipment for special purpose
General technical conditions for iron castings
General technical conditions for carbon steel castings
General technical conditions for nonferrous alloy castings
General technical conditions for forging
General technical conditions for welded parts
General technical conditions for machining
General technical conditions for assembly
General technical conditions for painting
Electrical equipment for special purpose
General technical conditions for control equipment
Test method for noise of casting machinery
JB/GQF3001 Method for determination of cleanliness of casting machinery 3 Technical requirements
3.1 Drawings and technical documents
The drawings and technical documents of rotor die-casting machines shall comply with the provisions of this standard and relevant current standards, and can only be used in production after approval in accordance with the prescribed procedures.
3.1.1 The design should have a reasonable layout, beautiful shape, safe and reliable performance, and be easy to operate and maintain. 3.1.2 The design should consider reducing the labor intensity of operators. The manual operating force should not exceed 50N, and the pedal force should not exceed 80N. For processes with high labor intensity (such as cutting, demoulding, etc.), mechanical methods should be used to solve them, and the convenience of product batch production should be considered. Approved by the Ministry of Machinery and Electronics Industry on June 28, 1991 and implemented on July 1, 1992
JB/T5358-1991
3.1.3 Important guide rail pairs, rotating pairs, columns, large bars, pistons, hydraulic cylinders, etc. should take wear-resistant measures and have reliable lubrication devices. 3.1.4 The packaging of the rotor die-casting machine and its parts and components should comply with the relevant provisions of the transportation and loading standards. 3.1.5 The channel openings of the hydraulic components and pipelines of the die-casting machine should have dust-proof measures when packaging . 3.2 Injection performance and parameters
The main performance and parameters of the rotor die-casting machine shall meet the die-casting process requirements of the motor rotor within its applicable scope. 3.2.1 The injection force shall be able to meet the filling pressure requirements required for the rotor castings within its applicable scope. 3.2.2 The filling pressures of different porcelain injection systems shall meet the requirements of their die-casting process and shall be determined through corresponding process tests when necessary. For Y series motor rotors, the filling pressure shall meet the following requirements:. Fan blade and balance column aluminum pouring system: the filling pressure is higher than 20MPa, and the minimum is not less than 14'MPab. Center aluminum injection system: the filling pressure is higher than 30MPa, and the minimum is not less than 25MPa. 3.2.3 Injection performance: The injection system of the rotor die-casting machine shall meet the following requirements: a. Injection system The system should have three-level (slow injection, fast injection, and boost) or two-level (injection, boost) injection performance, and should preferably be controlled by automatic control systems such as electrical-hydraulic or hydraulic feedback; b. The main parameters of the injection system (injection force, fast injection speed, boost pressure building time, etc.) should meet the die-casting process requirements of rotor castings within the applicable scope;
c The injection force, injection speed, and injection stroke of the injection system should be able to be adjusted steplessly within a certain range. 3.3 Precision: The precision of the rotor die-casting machine shall comply with the provisions of relevant precision standards. 3.4 Matching requirements
3.41 The rotor die-casting machine shipped from the factory should be equipped with necessary accessories and spare wearing parts. Special accessories are agreed upon by the user and the manufacturer, and are randomly supplied or ordered separately.
3.4.2 Rotor die-casting The purchased accessories of the machine (including hydraulic, electrical, pneumatic components and seals, etc.) shall obtain product certificates issued by units with production licenses, and must be installed for operation tests. 3.5 Others
3.5.1 The hydraulic, pneumatic, lubrication, cooling systems and related parts of the rotor die-casting machine should not leak oil, water or gas. 3.5.2 The operation, indication, lubrication, safety and other signs and symbols on the rotor die-casting machine shall comply with the provisions of JB8 and remain clear for a long time. 3.6 Safety and health protection, whether it is the design, selection, application, configuration, adjustment, control, etc. of the structure, components, hydraulic and electrical systems of the rotor die-casting machine, must first consider the maximum safety of personnel under various use and maintenance conditions, and minimize the loss of equipment in the event of an accident. 3.6.1 The electrical and hydraulic systems of the rotor die-casting machine should have reliable safety interlock protection devices. 3.6.2 At the end of mold closing, there should be obvious signs to display, and it should be possible to ensure that the mold closing action is completed in any other working state except for the inching adjustment before the injection action can be carried out.
3.6.3 Parts that affect work safety and operator safety should be equipped with protective devices (such as protective doors, covers, etc.). The protective doors should have safety interlocking devices to ensure that during work, the protective doors are not closed and the injection action cannot be performed. 3.6.4 Protective covers should be used for exposed couplings. 3.6.5 Parts that may automatically loosen should have reliable anti-loosening devices. 3.6.6 Operating (working) platforms that are located more than 1.5m above (or below) the ground should be equipped with stairs, corridors and other devices leading to the operating (working) platform. The operating (working) platform should have non-slip pedals and railings. The edge of the pedals should not be less than 40mm, and the railings should not be less than 800mm. The electrical system of the rotor die-casting machine should meet the following safety protection requirements: 3.6.7
It should be able to withstand a 1500V/min withstand voltage test;
The insulation resistance should not be less than 1M;
The continuous grounding resistance should not be greater than 0.1a
The electrical cabinet should have a door-opening power-off device or other reliable insurance devices. 3.6.8 The selection of all electrical and hydraulic components shall not exceed the technical specifications of the components. 3.6.9 Components in the hydraulic system that affect safety must be equipped with safety protection devices. 170
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3.6.10 The design and adjustment of the hydraulic system should ensure that its impact pressure is no more than 1.25 times the rated pressure, and the impact pressure and pressure loss shall not affect normal operation.
3.6.11 The electrical and hydraulic systems of the rotor die-casting machine should be able to prevent uncontrolled movement and abnormal working order under the conditions of starting, stopping, idling, adjustment and hydraulic failure of the actuator. 3.6.12 The hydraulic system using accumulators should be equipped with a device to release or cut off the pressure in the accumulator. When the equipment is turned off, the hydraulic pressure in it should be automatically released or reliably cut off from the hydraulic system. Gas accumulators must be filled with nitrogen or other inert gases and must be kept away from heat sources and installed vertically and firmly.
3.6.13 The maximum pressure of the accumulator system should be lower than or equal to its rated pressure, generally the same as the main system pressure or an independent liquid supply pump group should be used. If the pressure reduction and filling method is used (that is, the main system pressure is higher than the rated pressure of the accumulator system), a reliable safety protection device must be installed or effective anti-overload measures must be taken.
3.6.14 The noise sound pressure level of the rotor die-casting machine should be measured in accordance with the provisions of JB/GQ3004. Under the condition that the ambient noise is not more than 55dB, the value shall not exceed 85dB (impact noise during injection is not included) 3.6.15 When designing the rotor die-casting machine, the possibility of the user installing exhaust and dust removal devices should be considered. 3.7 The quality of castings, forgings, weldments and raw materials. 3.7.1 Iron castings, steel castings and non-ferrous metal castings shall comply with the relevant provisions of JB4328.1~4328.5. 3.7.2 Important castings, forgings and weldments (such as fuselage, crossbeams, dynamic and static mold plates, workbenches, mold bar seats, hydraulic cylinders and pressure vessels, etc.) should be treated to eliminate internal stress.
3.7.3 After machining the same guide rail surface, the hardness difference shall not be greater than HB25. 3.7.4 For special raw materials that directly affect product quality or performance, their requirements shall be specified in the product technical conditions. 3.7.3 Certain materials shall be allowed to be substituted after approval in accordance with the procedures specified by the enterprise without affecting product quality and performance. 3.8 Machining quality
3.8.1 The quality of machined parts shall comply with the drawings and process requirements. The deviation of the machined surface where the size tolerance and shape and position tolerance are not indicated on the drawings shall comply with the relevant provisions of JB4328.6. 3.8.2 The machined surface shall not have defects such as rust, burrs, scratches, etc. 3.8.3 The working surface of the guide rail and insert processed by the scraping method shall have uniform scraping points and no cutting marks. Use the matching surface (or grinding tool) for dyeing inspection and average calculation within an area of 300cm (if less than 300cm, average calculation shall be made according to the actual area). When the width of the guide rail and the insert is B, the requirements are as follows:
When aB<150mm, the number of contact points shall not be less than 36 points; when bB≥150mm, the number of contact points shall not be less than 32 points. 3.8.4 The working surface of the guide rail and the insert processed by fine planing, grinding or other cutting methods shall be uniformly inspected by coloring, and the cumulative value shall not be less than 70% of the total length and not less than 50% of the total width. Note: Only when the contact surface on the width reaches the specified value can it be used as the calculated value on the length. 3.9 Assembly quality
3.9.1 The rotor die-casting machine shall be assembled according to the assembly process regulations and comply with the relevant provisions of JB4328.8. 3.9.2 Important fixed joints shall be tightly fitted and inspected with a 0.05mm feeler gauge. The insertion depth shall not exceed 1/4 of the width of the split surface (and not more than 30mm), and the inserted part shall not exceed 10% of the inspectable length. Important fixed joint surfaces:
Fixed joint surfaces between the column shoulder and the worktable, and the upper plane of the lower beam (or static plate); a.
Fixed joint surfaces between the column (large bar) adjusting nut, the locking nut and the upper beam (or mold cylinder seat), the worktable, and the lower beam (or static plate);
Fixed joint surfaces between the hydraulic cylinder locking nut and the upper beam (or mold cylinder seat), and the fuselage beam; d.
Fixed joint surfaces between the hydraulic cylinder active The fixed joint surface between the rod shoulder and the movable crossbeam and the slider; e.
The fixed joint surface between the injection cylinder, the booster cylinder and its connecting parts; 171
JB/T5358—1991
【. The fixed joint surface between the injection cylinder assembly (including the booster cylinder, connecting parts, etc.) and the bracket, the lower cross frame (static plate) and other connecting parts: the fixed joint surface between the fuselage and the guide rail and the slider and the inlay; g.
h. The fixed joint surface between the crossbeam and the pillar of the combined cabinet frame: 1. The fixed joint surface between the workbench and the workbench (or lower crossbeam), the workbench (or lower crossbeam) and its connecting parts, etc. 3.9.3 Hydraulic cylinder with support ring sealing structure. The adjustment of its support ring should be appropriate and reliable, and the moving parts that slide down quickly under their own weight should not be blocked when sliding down.
3.9.4 The pipelines, channels, filling devices and inner surfaces of oil tanks of hydraulic, lubrication and cooling systems shall be thoroughly derusted and decontaminated before assembly.
The protective door (cover) shall be easy to open and close without any jamming phenomenon, and its corresponding interlocking elements (hydraulic or electrical) shall work reliably. 3.9.5
Quality of hydraulic equipment
3.10.1 Pressure test requirements
3.10.1.1 The material and weld of steel welded pressure vessels shall comply with the relevant provisions of JB741. Self-made hydraulic components shall comply with the provisions of GB7935. 3.10.1.2
3.10.1.3 The pressure test pressure of self-made hydraulic cylinder pressure vessels shall comply with the following requirements, and the pressure holding time shall not be less than 10 minutes, and leakage, permanent deformation and damage are not allowed.
a. When the rated pressure is less than 20MPa, the test pressure shall be 1.5 times of it; b. When the rated pressure is greater than or equal to 20MPa, the test pressure shall be 1.25 times of it. 3.10.2 Hydraulic drive requirements
Hydraulic drive parts (such as pistons, sliders, mobile workbenches, etc.) should not have vibration, creeping and stagnation within the specified travel and speed range, and there should be no impact that affects normal operation during reversing and pressure relief. 3.10.3 Hydraulic system requirements
3.10.3.1 The hydraulic system shall comply with the relevant provisions of GB3766. The safety technical requirements of the hydraulic system shall comply with the provisions of Articles 3.6.1, 3.6.2, 3.6.8, 3.6.9, 3.6.10, 3.6.11, 3.6.12 and 3.6.13 of this standard. 3.10.3.2 In order to facilitate use, adjustment, observation and testing, the hydraulic system shall be equipped with necessary test points or pressure gauges, etc. 3.10.3.3 The range of the pressure gauge is generally 1.52 times the rated pressure. In the part with impact pressure, an appropriate damping device should be installed in front of the pressure gauge.
The oil pipe should be tightened and clamped. Its connection and sealing should not be affected by vibration. The pipe clamp should not be welded on the pipeline, nor should it damage the pipeline. 3.10.3.4
3.10.3.5 The hydraulic system should have good maintainability. When disassembling components, the working fluid should not be lost in large quantities. The adjacent components should not be disassembled in large quantities, and the oil in the oil tank does not need to be drained.
3.10.3.6 The working fluid temperature in the hydraulic system tank shall not exceed 55℃ at the highest and shall not be lower than 15℃ at the lowest. If necessary, a cooler or heater should be considered.
3.10.3.7 The technical requirements of hydraulic components shall comply with the relevant provisions of GB7935. 3.10.3.8 The inner diameter of the hydraulic cylinder and the outer diameter of the piston rod shall comply with the relevant provisions of GB2348. 3.11 Quality of electrical devices
3.11.1 The electrical devices of the rotor die-casting machine shall comply with the relevant provisions of ZBK90001, and the safety technical requirements of the electrical devices shall comply with the provisions of Sections 3.6.1, 3.6.2, 3.6.7, 3.6.8 and 3.6.11 of this standard. 3.11.2 The minimum protection level of the electrical control cabinet, junction box, button box and other components is IP43. 3.11.3 Different control programs (such as inching, manual, automatic, semi-automatic cycle, etc.) should be set to meet the needs of different working conditions. 3.11.4 In systems that use or partially use weak current control, voltage stabilization measures should be considered to adapt to different power configurations and ensure the normal operation of the system.
3.12 Appearance quality
3.12.1 The outer surface of the rotor die-casting machine should not have protrusions, depressions, roughness and other damage not specified in the drawing. 3.12.2 The edges of the joint surfaces of parts and components shall be neat and even. Except as specified in the design, the general misalignment shall not be greater than that specified in Table 1. 172
JB/T5358—1991
3.12.3 The exposed machined surfaces of parts and components shall not be bruised, scratched or rusted, and the exposed welds shall be smoothed and evenly trimmed. The protective layer of electroplated and blued parts shall be intact.
3.12.4 When hydraulic, lubrication pipelines and electrical circuits are installed along the outer surface, they shall be arranged neatly and shall not come into contact with parts and components that move relative to each other. Table 1
Mating surface dimensions (length × width)
≤700×500
>700×500
>1000×700
>1200×1000
Dislocation not greater than
Countersunk screws should not protrude from the surface of the parts (except as specified in the design), and there should be no obvious eccentricity between their heads and the countersunk holes. Product nameplates, trademarks, etc. should be fixed in a conspicuous position on the machine. It is allowed to cast a clear Chinese name on the machine. Painting speed requirements
The painting of the rotor die-casting machine should comply with the relevant requirements of Class I accuracy in JB4328.9, and the painting of export products should comply with the provisions of JB1470. Test methods and inspection rules
4.1 Inspection rules
Inspection is divided into factory test and type test. 41.1
4.1.2 Each rotor die-casting machine shall be subjected to factory test at the manufacturer and shall not be allowed to leave the factory until it has passed the inspection by the inspection department. Under special circumstances, the test may also be carried out at the user's factory with the user's consent. 4.1.3 When new products are trial-produced or the structure, process and materials of old products are significantly modified, the first prototype must undergo type test and the corresponding test results shall be recorded.
Test method: The test items and methods of the rotor die-casting machine shall comply with the provisions of Table 2. 4.2
Inspection items
Basic parameters and dimensions
Performance test
Equal load test
Idle running continuous test
Main component quality
Cleanliness
Factory test
Type test
Technical requirements
According to Article 3.12
According to Articles 3.2 and 4.2.4 Articles
According to Article 4.2.1
According to Article 4.2.2
According to Article 4.2.3
According to Article 4.2.5
According to Article 3.6.14
According to the approved relevant technical documents
According to Article 4.2.6
Note: "+" means that tests are to be carried out. "" means no test is carried out. Performance test
Detection method
Direct detection
Direct detection and visual inspection
According to relevant accuracy standards
According to JB/GQ3004 standard
Direct detection
According to JB/GQF3001 standard
Should be carried out in combination with equal load test. The test shall be carried out according to the special test specifications in the technical conditions for product manufacturing and acceptance. The general performance test contents are as follows:
Motor-pump start and stop test; carry out continuously for not less than 3 times, the action shall be sensitive and reliable, without abnormal noise; a.
Operation test of each working cylinder: carry out continuously for not less than 3 times, the action shall be sensitive and reliable, without vibration, impact, creeping, stagnation and other adverse phenomena; b.
JB/T5358-1991
C. Injection performance test: Use a special test instrument to test, the test number shall not be less than 2 times, and the average value of each performance parameter measured shall not be lower than the provisions of the relevant basic parameter standards; d. Adjustment test of the stroke of the working cylinder: For the cylinder with stroke adjustment requirements, adjust according to the maximum working stroke, the action should be accurate, stable, and meet the design requirements;
e. Pressure adjustment test: According to the provisions of the product technical conditions and design requirements, the graded adjustment from low pressure to high pressure should be stable and reliable. f. Auxiliary device test: The action of the rotor die-casting mold feeding (exit) device, mobile workbench, manipulator and other auxiliary devices should be coordinated, accurate and reliable;
g. Safety device test: Test the action of emergency stop, emergency return, alarm (light), protective door protection circuit and photoelectric protection device, etc., which should be safe and reliable. 4.2.2 Equal load test
Equal load test refers to the idling test of different working procedures under the conditions of maximum closing force and injection force. Before the test, the machine accuracy must be adjusted and the mold pad for the test must be installed. Soft materials (such as lead, etc.) should be placed in the injection chamber in advance. Each working procedure shall be tested no less than 3 times, and the test items are as follows:
The fast and slow injection speed strokes are steplessly adjustable within the design range, and the action is accurate and reliable. b.
The injection force is adjustable. After the injection force is adjusted, under the condition of equal pipeline pressure, the difference in pressure value of each injection shall not exceed ±5%; after each injection, the pressure drop of the accumulator shall not exceed 10% of the working pressure; each pressure valve and pressure safety device must work within the specified pressure range; the emergency stop and stop devices shall be sensitive and reliable; f.
The main motor power shall be measured during the test and shall meet the design requirements; during the test, the machine noise shall be measured in accordance with the provisions of JB/GQ3004, and the noise sound pressure level shall not exceed the provisions of Article 3.6.14. g.
Random inspection is allowed for finalized products produced in batches; h During the test, check all hydraulic, lubrication, cooling systems and all pipes, joints, flanges and other joints, which should be well sealed, without oil, water, gas infiltration and mixing; 1.·After the test, check the machine accuracy, and its variation should be within the specified range of the relevant accuracy standards. 4.2.3 Idle operation continuous test
Idle operation continuous test should be carried out after equal load test. Before the test, the fast injection speed should be adjusted to 40%~60% of the highest fast injection speed specified in the relevant basic parameter standards, and the injection pressure should be adjusted to 60%~70% of the highest injection pressure. With the test mold pad installed and soft materials (such as lead, etc.) placed in the injection chamber in advance, an automatic or semi-automatic continuous working test is carried out. The continuous test time should be no less than 4h, and the following items are inspected.
a. Each program action should be smooth, coordinated and reliable. Each working cylinder should not have impact, creeping, stagnation and other phenomena. Each interlocking action should not have leading or lagging phenomena:
b. During the test period, the temperature rise or maximum overflow of the following parts and components shall be measured, which shall comply with the following regulations. Standardized products generally do not need to be measured, but random inspection is allowed.
The temperature rise of sliding bearings should not exceed 35℃, and the maximum temperature should not exceed 70℃; the temperature rise of rolling bearings should not exceed 40℃, and the maximum temperature should not exceed 75℃. The temperature rise of slider inserts and guide rails should not exceed 15℃, and the maximum temperature should not exceed 50℃. c. During the test, measure the maximum temperature of the working oil in the oil tank. Under the condition that the temperature of the cooling medium is not higher than 25℃, the working fluid temperature shall not exceed 55℃;
d. The components of the hydraulic and electrical systems should work sensitively and reliably; e.
The cooling and lubrication systems should work normally, and there should be no looseness in the fastening parts; during the test, the time of the dry cycle for one week should be detected, which should meet the requirements of the relevant basic parameter standards; f.
During the test, check the sealing of each system according to the requirements of Article 4.2.2h, which should meet the requirements; during the test, re-check Article 4.2.2c, which should meet the requirements; JB/T5358-1991
During the test, re-check Article 4.2.2s, which should meet the requirements. Finalized products do not need to be retested, but random inspection is allowed: i.
i. During the test, continuous trouble-free operation should be no less than 2 hours; when a fault occurs, it is allowed to be eliminated, but the time for each troubleshooting shall not exceed 15 minutes, and the cumulative time shall not exceed 30 minutes (failures caused by power supply influence shall be analyzed separately); after the test, the machine accuracy shall be retested and recorded in the certificate of conformity. k.
4.2.4 Basic parameters and dimensions inspection
Except for the clamping force and injection force, all other inspections shall be conducted under no-load conditions. The inspection items are as follows: a.
Maximum clamping force: shall comply with the specified values of the relevant basic parameter standards; Maximum injection force: shall comply with the specified values of the relevant basic parameter standards; Maximum clamping stroke: shall be greater than or equal to the specified values of the relevant basic parameter standards, Maximum injection stroke: shall be greater than or equal to the specified values of the relevant basic parameter standards; Other working cylinder strokes: shall be greater than or equal to the design specified values; Other working cylinder forces: shall be greater than or equal to the design specified values; Maximum distance between the working surfaces of the beam (or template): shall be greater than or equal to the specified values of the relevant basic parameter standards; Internal spacing of the columns (large bars): shall be greater than or equal to the specified values of the relevant basic parameter standards; Fast injection speed and pressure-building time shall be higher (faster) than or equal to the specified values of the relevant basic parameter standards. Inspections shall be conducted under normal voltage conditions. Note:
② The internal spacing of the column (large bar) belongs to the general processing dimension deviation, and its deviation shall comply with the IT14 level limit deviation provisions in GB1804. Fast injection speed and pressure build-up time are measured under equal load conditions. ?
③ The idle cycle time is cut under the conditions of the idle continuous test. 4.2.5 Accuracy inspection
After the equal load test and the idle continuous test, the accuracy inspection shall be carried out according to the relevant accuracy standards. The actual measured accuracy value after the idle continuous test shall be recorded in the certificate of conformity. The finalized products may also only be inspected for accuracy after the equal load test, but random inspection is allowed. 4.2.6 Cleanliness inspection
4.2.6.1After the idle continuous test, the inspection shall be carried out according to the provisions of the JB/GQF3001 standard, and shall comply with the provisions of the relevant standards or approved technical documents.
4.2.6.2For finalized products, regular random inspection shall be carried out according to relevant regulations. 5 Packaging, marking and transportation
5.1 The packaging and marking of rotor die-casting machines and their parts shall comply with the relevant provisions of ZBJ50014, GB191 and the provisions of relevant loading and transportation standards.
5.2 The coating and anti-rust of the exposed machined surfaces of parts, components and spare parts of rotor die-casting machines shall comply with the relevant provisions of ZBJ50013. 5.3 When the rotor die-casting machine leaves the factory, the following documents shall be attached: Product instruction manual:
Product certificate of conformity:
Energy device certificate of conformity (provided by the production unit with a production license);
d. Packing list.
5.4 The packaging, marking and anti-rust of export products shall comply with the relevant provisions of JB1471, GB191 and JB1469. Additional notes:
This standard is proposed and managed by the Shenyang Electrical Special Equipment Research Institute of the Ministry of Machinery and Electronics Industry. This standard was drafted by Changcheng Electrical Machinery Factory, Shanghai Electric Science Research Institute, Shenyang Electrical Machinery Factory and other units. The main drafters of this standard are Yang Xiaowei, Hu Cuina, Zhao Hongji and Chen Jiashan.6
Note: "+" means a test is to be carried out. "" means no test is carried out. Performance test
Detection method
Direct detection
Direct detection and visual inspection
According to relevant accuracy standards
According to JB/GQ3004 standard
Direct detection
According to JB/GQF3001 standard
Should be carried out in combination with equal load test. The test shall be carried out according to the special test specifications in the technical conditions for product manufacturing and acceptance. The general performance test contents are as follows:
Motor-pump start and stop test; carry out continuously for not less than 3 times, the action shall be sensitive and reliable, without abnormal noise; a.
Operation test of each working cylinder: carry out continuously for not less than 3 times, the action shall be sensitive and reliable, without vibration, impact, creeping, stagnation and other adverse phenomena; b.
JB/T5358-1991
C. Injection performance test: Use a special test instrument to test, the test number shall not be less than 2 times, and the average value of each performance parameter measured shall not be lower than the provisions of the relevant basic parameter standards; d. Adjustment test of the stroke of the working cylinder: For the cylinder with stroke adjustment requirements, adjust according to the maximum working stroke, the action should be accurate, stable, and meet the design requirements;
e. Pressure adjustment test: According to the provisions of the product technical conditions and design requirements, the graded adjustment from low pressure to high pressure should be stable and reliable. f. Auxiliary device test: The action of the rotor die-casting mold feeding (exit) device, mobile workbench, manipulator and other auxiliary devices should be coordinated, accurate and reliable;
g. Safety device test: Test the action of emergency stop, emergency return, alarm (light), protective door protection circuit and photoelectric protection device, etc., which should be safe and reliable. 4.2.2 Equal load test
Equal load test refers to the idling test of different working procedures under the conditions of maximum closing force and injection force. Before the test, the machine accuracy must be adjusted and the mold pad for the test must be installed. Soft materials (such as lead, etc.) should be placed in the injection chamber in advance. Each working procedure shall be tested no less than 3 times, and the test items are as follows:
The fast and slow injection speed strokes are steplessly adjustable within the design range, and the action is accurate and reliable. b.
The injection force is adjustable. After the injection force is adjusted, under the condition of equal pipeline pressure, the difference in pressure value of each injection shall not exceed ±5%; after each injection, the pressure drop of the accumulator shall not exceed 10% of the working pressure; each pressure valve and pressure safety device must work within the specified pressure range; the emergency stop and stop devices shall be sensitive and reliable; f.
During the test, the main motor power shall be measured, which shall meet the design requirements; during the test, the machine noise shall be measured in accordance with the provisions of JB/GQ3004, and the noise sound pressure level shall not exceed the provisions of Article 3.6.14. g.
Random inspection is allowed for finalized products produced in batches; h During the test, check all hydraulic, lubrication, cooling systems and all pipes, joints, flanges and other joints, which should be well sealed, without oil, water, gas infiltration and mixing; 1.·After the test, check the machine accuracy, and its variation should be within the specified range of the relevant accuracy standards. 4.2.3 Idle operation continuous test
Idle operation continuous test should be carried out after equal load test. Before the test, the fast injection speed should be adjusted to 40%~60% of the highest fast injection speed specified in the relevant basic parameter standards, and the injection pressure should be adjusted to 60%~70% of the highest injection pressure. With the test mold pad installed and soft materials (such as lead, etc.) placed in the injection chamber in advance, automatic or semi-automatic continuous working test should be carried out. The continuous test time should be no less than 4h, and the following items should be inspected.
a. Each program action should be smooth, coordinated and reliable. Each working cylinder should not have impact, creeping, stagnation and other phenomena. Each interlocking action should not have leading or lagging phenomena:
b. During the test period, the temperature rise or maximum overflow of the following parts and components should be measured, which should comply with the following regulations. Standardized products generally do not need to be measured, but random inspection is allowed.
The temperature rise of sliding bearings should not exceed 35℃, and the maximum temperature should not exceed 70℃; the temperature rise of rolling bearings should not exceed 40℃, and the maximum temperature should not exceed 75℃. The temperature rise of slider inserts and guide rails should not exceed 15℃, and the maximum temperature should not exceed 50℃. c. During the test, measure the maximum temperature of the working oil in the oil tank. Under the condition that the temperature of the cooling medium is not higher than 25℃, the working fluid temperature shall not exceed 55℃;
d. The components of the hydraulic and electrical systems should work sensitively and reliably; e.
The cooling and lubrication systems should work normally, and there should be no looseness in the fastening parts; during the test, the time of the dry cycle for one week should be detected, which should meet the requirements of the relevant basic parameter standards; f.
During the test, check the sealing of each system according to the requirements of Article 4.2.2h, which should meet the requirements; during the test, re-check Article 4.2.2c, which should meet the requirements; JB/T5358-1991
During the test, re-check Article 4.2.2s, which should meet the requirements. Finalized products do not need to be retested, but random inspection is allowed: i.
i. During the test, continuous trouble-free operation should be no less than 2 hours; when a fault occurs, it is allowed to be eliminated, but the time for each troubleshooting shall not exceed 15 minutes, and the cumulative time shall not exceed 30 minutes (failures caused by power supply influence shall be analyzed separately); after the test, the machine accuracy shall be retested and recorded in the certificate of conformity. k.
4.2.4 Basic parameters and dimensions inspection
Except for the clamping force and injection force, all other inspections shall be conducted under no-load conditions. The inspection items are as follows: a.
Maximum clamping force: shall comply with the specified values of the relevant basic parameter standards; Maximum injection force: shall comply with the specified values of the relevant basic parameter standards; Maximum clamping stroke: shall be greater than or equal to the specified values of the relevant basic parameter standards, Maximum injection stroke: shall be greater than or equal to the specified values of the relevant basic parameter standards; Other working cylinder strokes: shall be greater than or equal to the design specified values; Other working cylinder forces: shall be greater than or equal to the design specified values; Maximum distance between the working surfaces of the beam (or template): shall be greater than or equal to the specified values of the relevant basic parameter standards; Internal spacing of the columns (large bars): shall be greater than or equal to the specified values of the relevant basic parameter standards; Fast injection speed and pressure-building time shall be higher (faster) than or equal to the specified values of the relevant basic parameter standards. Inspections shall be conducted under normal voltage conditions. Note:
② The internal spacing of the column (large bar) belongs to the general processing dimension deviation, and its deviation shall comply with the IT14 level limit deviation provisions in GB1804. Fast injection speed and pressure build-up time are measured under equal load conditions. ?
③ The idle cycle time is cut under the conditions of the idle continuous test. 4.2.5 Accuracy inspection
After the equal load test and the idle continuous test, the accuracy inspection shall be carried out according to the relevant accuracy standards. The actual measured accuracy value after the idle continuous test shall be recorded in the certificate of conformity. The finalized products may also only be inspected for accuracy after the equal load test, but random inspection is allowed. 4.2.6 Cleanliness inspection
4.2.6.1After the idle continuous test, the inspection shall be carried out according to the provisions of the JB/GQF3001 standard, and shall comply with the provisions of the relevant standards or approved technical documents.
4.2.6.2For finalized products, regular random inspection shall be carried out according to relevant regulations. 5 Packaging, marking and transportation
5.1 The packaging and marking of rotor die-casting machines and their parts shall comply with the relevant provisions of ZBJ50014, GB191 and the provisions of relevant loading and transportation standards.
5.2 The coating and anti-rust of the exposed machined surfaces of parts, components and spare parts of rotor die-casting machines shall comply with the relevant provisions of ZBJ50013. 5.3 When the rotor die-casting machine leaves the factory, the following documents shall be attached: Product instruction manual:
Product certificate of conformity:
Energy device certificate of conformity (provided by the production unit with a production license);
d. Packing list.
5.4 The packaging, marking and anti-rust of export products shall comply with the relevant provisions of JB1471, GB191 and JB1469. Additional notes:
This standard is proposed and managed by the Shenyang Electrical Special Equipment Research Institute of the Ministry of Machinery and Electronics Industry. This standard was drafted by Changcheng Electrical Machinery Factory, Shanghai Electric Science Research Institute, Shenyang Electrical Machinery Factory and other units. The main drafters of this standard are Yang Xiaowei, Hu Cuina, Zhao Hongji and Chen Jiashan.6
Note: "+" means a test is to be carried out. "" means no test is carried out. Performance test
Detection method
Direct detection
Direct detection and visual inspection
According to relevant accuracy standards
According to JB/GQ3004 standard
Direct detection
According to JB/GQF3001 standard
Should be carried out in combination with equal load test. The test shall be carried out according to the special test specifications in the technical conditions for product manufacturing and acceptance. The general performance test contents are as follows:
Motor-pump start and stop test; carry out continuously for not less than 3 times, the action shall be sensitive and reliable, without abnormal noise; a.
Operation test of each working cylinder: carry out continuously for not less than 3 times, the action shall be sensitive and reliable, without vibration, impact, creeping, stagnation and other adverse phenomena; b.
JB/T5358-1991
C. Injection performance test: Use a special test instrument to test, the test number shall not be less than 2 times, and the average value of each performance parameter measured shall not be lower than the provisions of the relevant basic parameter standards; d. Adjustment test of the stroke of the working cylinder: For the cylinder with stroke adjustment requirements, adjust according to the maximum working stroke, the action should be accurate, stable, and meet the design requirements;
e. Pressure adjustment test: According to the provisions of the product technical conditions and design requirements, the graded adjustment from low pressure to high pressure should be stable and reliable. f. Auxiliary device test: The action of the rotor die-casting mold feeding (exit) device, mobile workbench, manipulator and other auxiliary devices should be coordinated, accurate and reliable;
g. Safety device test: Test the action of emergency stop, emergency return, alarm (light), protective door protection circuit and photoelectric protection device, etc., which should be safe and reliable. 4.2.2 Equal load test
Equal load test refers to the idling test of different working procedures under the conditions of maximum closing force and injection force. Before the test, the accuracy of the machine must be adjusted and the mold pad for the test must be installed. Soft materials (such as lead, etc.) should be placed in the injection chamber in advance. Each working procedure shall be tested no less than 3 times, and the test items are as follows:
The fast and slow injection speed strokes are steplessly adjustable within the design range, and the action is accurate and reliable. b.
The injection force is adjustable. After the injection force is adjusted, under the condition of equal pipeline pressure, the difference in pressure value of each injection shall not exceed ±5%; after each injection, the pressure drop of the accumulator shall not exceed 10% of the working pressure; each pressure valve and pressure safety device must work within the specified pressure range; the emergency stop and stop devices shall be sensitive and reliable; f.
During the test, the main motor power shall be measured, which shall meet the design requirements; during the test, the machine noise shall be measured in accordance with the provisions of JB/GQ3004, and the noise sound pressure level shall not exceed the provisions of Article 3.6.14. g.
Random inspection is allowed for finalized products produced in batches; h During the test, check all hydraulic, lubrication, cooling systems and all pipes, joints, flanges and other joints, which should be well sealed, without oil, water, gas infiltration and mixing; 1.·After the test, check the machine accuracy, and its variation should be within the specified range of the relevant accuracy standards. 4.2.3 Idle operation continuous test
Idle operation continuous test should be carried out after equal load test. Before the test, the fast injection speed should be adjusted to 40%~60% of the highest fast injection speed specified in the relevant basic parameter standards, and the injection pressure should be adjusted to 60%~70% of the highest injection pressure. With the test mold pad installed and soft materials (such as lead, etc.) placed in the injection chamber in advance, automatic or semi-automatic continuous working test should be carried out. The continuous test time should be no less than 4h, and the following items should be inspected.
a. Each program action should be smooth, coordinated and reliable. Each working cylinder should not have impact, creeping, stagnation and other phenomena. Each interlocking action should not have leading or lagging phenomena: wwW.bzxz.Net
b. During the test period, the temperature rise or maximum overflow of the following parts and components should be measured, which should comply with the following regulations. Standardized products generally do not need to be measured, but random inspection is allowed.
The temperature rise of sliding bearings should not exceed 35℃, and the maximum temperature should not exceed 70℃; the temperature rise of rolling bearings should not exceed 40℃, and the maximum temperature should not exceed 75℃. The temperature rise of slider inserts and guide rails should not exceed 15℃, and the maximum temperature should not exceed 50℃. c. During the test, measure the maximum temperature of the working oil in the oil tank. Under the condition that the temperature of the cooling medium is not higher than 25℃, the working fluid temperature shall not exceed 55℃;
d. The components of the hydraulic and electrical systems should work sensitively and reliably; e.
The cooling and lubrication systems should work normally, and there should be no looseness in the fastening parts; during the test, the time of the dry cycle for one week should be detected, which should meet the requirements of the relevant basic parameter standards; f.
During the test, check the sealing of each system according to the requirements of Article 4.2.2h, which should meet the requirements; during the test, re-check Article 4.2.2c, which should meet the requirements; JB/T5358-1991
During the test, re-check Article 4.2.2s, which should meet the requirements. Finalized products do not need to be retested, but random inspection is allowed: i.
i. During the test, continuous trouble-free operation should be no less than 2 hours; when a fault occurs, it is allowed to be eliminated, but the time for each troubleshooting shall not exceed 15 minutes, and the cumulative time shall not exceed 30 minutes (failures caused by power supply influence shall be analyzed separately); after the test, the machine accuracy shall be retested and recorded in the certificate of conformity. k.
4.2.4 Basic parameters and dimensions inspection
Except for the clamping force and injection force, all other inspections shall be conducted under no-load conditions. The inspection items are as follows: a.
Maximum clamping force: shall comply with the specified values of the relevant basic parameter standards; Maximum injection force: shall comply with the specified values of the relevant basic parameter standards; Maximum clamping stroke: shall be greater than or equal to the specified values of the relevant basic parameter standards, Maximum injection stroke: shall be greater than or equal to the specified values of the relevant basic parameter standards; Other working cylinder strokes: shall be greater than or equal to the design specified values; Other working cylinder forces: shall be greater than or equal to the design specified values; Maximum distance between the working surfaces of the beam (or template): shall be greater than or equal to the specified values of the relevant basic parameter standards; Internal spacing of the columns (large bars): shall be greater than or equal to the specified values of the relevant basic parameter standards; Fast injection speed and pressure-building time shall be higher (faster) than or equal to the specified values of the relevant basic parameter standards. Inspections shall be conducted under normal voltage conditions. Note:
② The internal spacing of the column (large bar) belongs to the general processing dimension deviation, and its deviation shall comply with the IT14 level limit deviation provisions in GB1804. Fast injection speed and pressure build-up time are measured under equal load conditions. ?
③ The idle cycle time is cut under the conditions of the idle continuous test. 4.2.5 Accuracy inspection
After the equal load test and the idle continuous test, the accuracy inspection shall be carried out according to the relevant accuracy standards. The actual measured accuracy value after the idle continuous test shall be recorded in the certificate of conformity. The finalized products may also only be inspected for accuracy after the equal load test, but random inspection is allowed. 4.2.6 Cleanliness inspection
4.2.6.1After the idle continuous test, the inspection shall be carried out according to the provisions of the JB/GQF3001 standard, and shall comply with the provisions of the relevant standards or approved technical documents.
4.2.6.2For finalized products, regular random inspection shall be carried out according to relevant regulations. 5 Packaging, marking and transportation
5.1 The packaging and marking of rotor die-casting machines and their parts shall comply with the relevant provisions of ZBJ50014, GB191 and the provisions of relevant loading and transportation standards.
5.2 The coating and anti-rust of the exposed machined surfaces of parts, components and spare parts of rotor die-casting machines shall comply with the relevant provisions of ZBJ50013. 5.3 When the rotor die-casting machine leaves the factory, the following documents shall be attached: Product instruction manual:
Product certificate of conformity:
Energy device certificate of conformity (provided by the production unit with a production license);
d. Packing list.
5.4 The packaging, marking and anti-rust of export products shall comply with the relevant provisions of JB1471, GB191 and JB1469. Additional notes:
This standard is proposed and managed by the Shenyang Electrical Special Equipment Research Institute of the Ministry of Machinery and Electronics Industry. This standard was drafted by Changcheng Electrical Machinery Factory, Shanghai Electric Science Research Institute, Shenyang Electrical Machinery Factory and other units. The main drafters of this standard are Yang Xiaowei, Hu Cuina, Zhao Hongji and Chen Jiashan.4 The packaging, marking and rust prevention of export products shall comply with the relevant provisions of JB1471, GB191 and JB1469. Additional remarks:
This standard was proposed and managed by the Shenyang Electrical Equipment Research Institute of the Ministry of Machinery and Electronics Industry. This standard was drafted by Changcheng Electrical Machinery Factory, Shanghai Electric Science Research Institute, Shenyang Electrical Machinery Factory and other units. The main drafters of this standard are Yang Xiaowei, Hu Cuina, Zhao Hongji and Chen Jiashan. 1754 The packaging, marking and rust prevention of export products shall comply with the relevant provisions of JB1471, GB191 and JB1469. Additional remarks:
This standard was proposed and managed by the Shenyang Electrical Equipment Research Institute of the Ministry of Machinery and Electronics Industry. This standard was drafted by Changcheng Electrical Machinery Factory, Shanghai Electric Science Research Institute, Shenyang Electrical Machinery Factory and other units. The main drafters of this standard are Yang Xiaowei, Hu Cuina, Zhao Hongji and Chen Jiashan. 175
Operation test of each working cylinder: continuous, no less than 3 times, the action should be sensitive and reliable, without vibration, impact, creeping, stagnation and other adverse phenomena;
JB/T5358-1991
C. Injection performance test: use special test instruments to test, the test number is not less than 2 times, the average value of each performance parameter measured shall not be lower than the provisions of the relevant basic parameter standards; d. Adjustment test of the stroke of the working cylinder: for the cylinder with stroke adjustment requirements, adjust according to the maximum working stroke, the action should be accurate, stable and meet the design requirements;
e. Pressure adjustment test: according to the provisions of the product technical conditions and design requirements, the graded adjustment from low pressure to high pressure should be stable and reliable. f. Auxiliary device test: the action of the rotor die-casting mold feeding (exit) device, mobile workbench, manipulator and other auxiliary devices should be coordinated, accurate and reliable;
g. Safety device test: Test the actions of emergency stop, emergency return, alarm (light), protective door protection circuit and photoelectric protection device, etc., all of which should be safe and reliable. 4.2.2 Equal load test
Equal load test refers to the idling test of different working procedures under the condition of maximum closing force and injection force. Before the test, the accuracy of the machine must be adjusted, and the mold pad for the test must be installed. Soft materials (such as lead, etc.) should be placed in the injection chamber in advance. Each working procedure shall be tested no less than 3 times, and the test items are as follows:
The fast and slow injection speed strokes are steplessly adjustable within the design range, and the action is accurate and reliable. b.
The injection force is adjustable. After the injection force is adjusted, under the condition of equal pipeline pressure, the difference in pressure value of each injection shall not exceed ±5%; after each injection, the pressure drop of the accumulator shall not exceed 10% of the working pressure; each pressure valve and pressure safety device must work within the specified pressure range; the emergency stop and stop devices shall be sensitive and reliable; f.
During the test, the main motor power shall be measured, which shall meet the design requirements; during the test, the machine noise shall be measured in accordance with the provisions of JB/GQ3004, and the noise sound pressure level shall not exceed the provisions of Article 3.6.14. g.
Random inspection is allowed for finalized products produced in batches; h During the test, check all hydraulic, lubrication, cooling systems and all pipes, joints, flanges and other joints, which should be well sealed, without oil, water, gas infiltration and mixing; 1.·After the test, check the machine accuracy, and its variation should be within the specified range of the relevant accuracy standards. 4.2.3 Idle operation continuous test
Idle operation continuous test should be carried out after equal load test. Before the test, the fast injection speed should be adjusted to 40%~60% of the highest fast injection speed specified in the relevant basic parameter standards, and the injection pressure should be adjusted to 60%~70% of the highest injection pressure. With the test mold pad installed and soft materials (such as lead, etc.) placed in the injection chamber in advance, automatic or semi-automatic continuous working test should be carried out. The continuous test time should be no less than 4h, and the following items should be inspected.
a. Each program action should be smooth, coordinated and reliable. Each working cylinder should not have impact, creeping, stagnation and other phenomena. Each interlocking action should not have leading or lagging phenomena:
b. During the test period, the temperature rise or maximum overflow of the following parts and components shall be measured, which shall comply with the following regulations. Standardized products generally do not need to be measured, but random inspection is allowed.
The temperature rise of sliding bearings should not exceed 35℃, and the maximum temperature should not exceed 70℃; the temperature rise of rolling bearings should not exceed 40℃, and the maximum temperature should not exceed 75℃. The temperature rise of slider inserts and guide rails should not exceed 15℃, and the maximum temperature should not exceed 50℃. c. During the test, measure the maximum temperature of the working oil in the oil tank. Under the condition that the temperature of the cooling medium is not higher than 25℃, the working fluid temperature shall not exceed 55℃;
d. The components of the hydraulic and electrical systems should work sensitively and reliably; e.
The cooling and lubrication systems should work normally, and there should be no looseness in the fastening parts; during the test, the time of the dry cycle for one week should be detected, which should meet the requirements of the relevant basic parameter standards; f.
During the test, check the sealing of each system according to the requirements of Article 4.2.2h, which should meet the requirements; during the test, re-check Article 4.2.2c, which should meet the requirements; JB/T5358-1991
During the test, re-check Article 4.2.2s, which should meet the requirements. Finalized products do not need to be retested, but random inspection is allowed: i.
i. During the test, continuous trouble-free operation should be no less than 2 hours; when a fault occurs, it is allowed to be eliminated, but the time for each troubleshooting shall not exceed 15 minutes, and the cumulative time shall not exceed 30 minutes (failures caused by power supply influence shall be analyzed separately); after the test, the machine accuracy shall be retested and recorded in the certificate of conformity. k.
4.2.4 Basic parameters and dimensions inspection
Except for the clamping force and injection force, all other inspections shall be conducted under no-load conditions. The inspection items are as follows: a.
Maximum clamping force: shall comply with the specified values of the relevant basic parameter standards; Maximum injection force: shall comply with the specified values of the relevant basic parameter standards; Maximum clamping stroke: shall be greater than or equal to the specified values of the relevant basic parameter standards, Maximum injection stroke: shall be greater than or equal to the specified values of the relevant basic parameter standards; Other working cylinder strokes: shall be greater than or equal to the design specified values; Other working cylinder forces: shall be greater than or equal to the design specified values; Maximum distance between the working surfaces of the beam (or template): shall be greater than or equal to the specified values of the relevant basic parameter standards; Internal spacing of the columns (large bars): shall be greater than or equal to the specified values of the relevant basic parameter standards; Fast injection speed and pressure-building time shall be higher (faster) than or equal to the specified values of the relevant basic parameter standards. Inspections shall be conducted under normal voltage conditions. Note:
② The internal spacing of the column (large bar) belongs to the general processing dimension deviation, and its deviation shall comply with the IT14 level limit deviation provisions in GB1804. Fast injection speed and pressure build-up time are measured under equal load conditions. ?
③ The idle cycle time is cut under the conditions of the idle continuous test. 4.2.5 Accuracy inspection
After the equal load test and the idle continuous test, the accuracy inspection shall be carried out according to the relevant accuracy standards. The actual measured accuracy value after the idle continuous test shall be recorded in the certificate of conformity. The finalized products may also only be inspected for accuracy after the equal load test, but random inspection is allowed. 4.2.6 Cleanliness inspection
4.2.6.1After the idle continuous test, the inspection shall be carried out according to the provisions of the JB/GQF3001 standard, and shall comply with the provisions of the relevant standards or approved technical documents.
4.2.6.2For finalized products, regular random inspection shall be carried out according to relevant regulations. 5 Packaging, marking and transportation
5.1 The packaging and marking of rotor die-casting machines and their parts shall comply with the relevant provisions of ZBJ50014, GB191 and the provisions of relevant loading and transportation standards.
5.2 The coating and anti-rust of the exposed machined surfaces of parts, components and spare parts of rotor die-casting machines shall comply with the relevant provisions of ZBJ50013. 5.3 When the rotor die-casting machine leaves the factory, the following documents shall be attached: Product instruction manual:
Product certificate of conformity:
Energy device certificate of conformity (provided by the production unit with a production license);
d. Packing list.
5.4 The packaging, marking and anti-rust of export products shall comply with the relevant provisions of JB1471, GB191 and JB1469. Additional notes:
This standard is proposed and managed by the Shenyang Electrical Special Equipment Research Institute of the Ministry of Machinery and Electronics Industry. This standard was drafted by Changcheng Electrical Machinery Factory, Shanghai Electric Science Research Institute, Shenyang Electrical Machinery Factory and other units. The main drafters of this standard are Yang Xiaowei, Hu Cuina, Zhao Hongji and Chen Jiashan.
Operation test of each working cylinder: continuous, no less than 3 times, the action should be sens
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