Some standard content:
ICS25.120.10
J62
JB
Machinery Industry Standard of the People's Republic of China
JB/T5201.2-1999
Thread rolling machine||tt| |Released on 1999-05-14
Technical conditions
Implemented on 2000-01-01
National Machinery Industry Bureau
Released
JB/T5201.2 -1999
Previous
Preface
This standard is a revision of ZBJ6201889 "Technical Conditions for Thread Rolling Machines". The technical content of this standard is basically consistent with ZBJ62018-89, and has only been re-edited in accordance with relevant regulations. This standard will be implemented from January 1, 2000. This standard replaces ZBJ62018-89 from the date of implementation. This standard is proposed and administered by the National Forging Press Plate Standardization Technical Committee. The unit responsible for drafting this standard: Qingdao Shengjian Machinery Factory. This standard was first published in July 1980. wwW.bzxz.Net
1 Scope
Mechanical Industry Standard of the People's Republic of China
Technical Conditions for Thread Rolling Machines
This standard specifies the basic requirements for the design, manufacture and acceptance of thread rolling machines. JB/T 5201.21999
replaces ZBJ62018-89
This standard is applicable to thread rolling machines with a maximum rolling force of 16~1250kN, two spindles that rotate synchronously in the same direction and move relative to each other in the horizontal direction.
2 Reference standards
The provisions contained in the following standards constitute provisions of this standard by being quoted in this standard. At the time of publication, the editions indicated were valid. All standards are subject to revision and parties using this standard should explore the possibility of using the latest version of the standard listed below. GB 191-1990
GB/T 3766—1983
GB50831998
GB/T 5226.1—1996
GB/T 7935-1987
GB/ T 13306—1991
GB17120—1997
JB/T 1829—1997
JB/T 3240—1999
JB/T 5201.11999
JB/ T 8356.1—1996
JB/T 9954—1999
JB9972—1999
3 Technical requirements
3.1 Basic requirements
Packaging, storage and transportation pictorial mark
Hydraulic systems, general technical conditions
General principles for safety and hygiene design of production equipment
Industrial machinery and electrical equipment Part 1: General technical conditions General technical conditions for hydraulic components
Signage| |tt||Safety technical conditions for forging machinery
General technical conditions for forging machinery
Visual symbols for forging machinery operating instructions
Thread rolling machine precision
Machine tool packaging technical conditions| |tt||Cleanliness of the hydraulic system of forging machinery
Noise limits for spring coiling machines, thread rolling machines, and nail making machines 3.1.1 The model, basic parameters, dimensions, accuracy, and technical documents of the lacquer wire machine should all be Comply with the provisions of corresponding standards, or be manufactured in accordance with technical documents approved by relevant departments.
3.1.2 The design of the thread rolling machine should have a reasonable structural layout, excellent performance, reliable operation, safety and durability, easy operation, beautiful appearance, easy maintenance, and should meet the requirements of standardization. 3.1.3 The thread rolling machine should be delivered as a complete set when leaving the factory, and should be equipped with accessories for normal use of the machine and spare wearing parts required for maintenance. The supply of special accessories is agreed between the supplier and the buyer.
3.1.4 The manufacturer should ensure the quality of purchased parts for the thread rolling machine (including electrical and hydraulic components) and comply with the requirements of the corresponding standards. The operation test should be carried out at the same time as the thread rolling machine before leaving the factory. Approved by the State Administration of Machinery Industry on 1999-05-14 and implemented on 2000-01-01
JB/T5201.21999
3.1.5 The design and manufacture of thread rolling machines must comply with the regulations of GB5083 and GB17120. 3.1.6 The technical documents provided with the thread rolling machine should comply with the relevant standards. 3.2 Quality of castings, forgings and weldings
3.2.1 All castings, forgings and weldings on the thread rolling machine shall comply with the provisions of the corresponding standards. 3.2.2 The non-machined surfaces of castings and weldments should be smooth, and their straightness tolerances should be as specified in Table 1. Table 1
Accessories categories
pieces
cast
iron
welded
connected
pieces
The straightness tolerance is 3
4
mm
3.2.3 For castings and welding defects that do not affect the performance, accuracy and appearance of the thread rolling machine, the Under the condition of ensuring quality, repairs are allowed according to the prescribed technical documents.
3.3 Processing quality
3.3.1 The processing quality of parts should comply with the requirements of design, process and relevant standards. The material and heat treatment requirements of main parts should comply with the requirements of relevant standards and technical documents. 3.3.2 There should be no traces of mechanical processing or obvious knife marks on the scraped surface. Use the mating surface (grinding tool) for coloring inspection, and the scraping points should be even. Based on the average calculation within the specified calculation area, the number of contact points in each 25mm × 25mm area should not be less than that specified in Table 2. One of the joint surfaces of the two fitting parts is a scraped surface and the other is a machined surface. When using the machined surface of the fitting part to check the number of contact points on the scraped surface, it should not be less than 75% of the points specified in Table 2. Table 2
Sliding guide rail
Width of each guide rail
mm
≤250
10
to
>250
8
Main
Shaft
120
12
Straight
Diameter
mm|| tt||Sliding bearing
>120
10
1 The joint surface of the two mating parts is a set of guide rails of different widths, which are inspected according to the specified points of the wide guide rails. 2 The minimum number of points within an individual 25mm×25mm area shall not be less than one percent of the specified number of points. The sliding surface of the plated strip and the pressure plate,
Special amount to fix the joint surface
Number of contact points
3 When calculating the average number of contact points per 25mm×25mm area, calculate the area: machine mass 100cm when ≤10t, 300cm when machine mass >10t
4 The inspection contact point medium is red lead paint
3.3.3 When the joint surfaces of the two mating parts are both machined surfaces, coating should be applied Use the color method to check the contact. The contact should be uniform and the contact area index (percentage) should not be less than the requirements in Table 3. 2
Full length upper
70
Sliding guide rail
JB/T5201.21999
Table 3
Full width upper||tt ||50
Particularly important fixed joint surface
Over the entire length
60
Note: Only when the width reaches the specified length of contact can it be used as the length. Calculated. 3.4 Assembly quality
full width
35
%
3.4.1 The thread rolling machine should be assembled according to the assembly process regulations. The parts and components assembled on the machine should meet quality requirements. It is not allowed to install gaskets, covers and other parts not specified in the drawings. 3.4.2 The joint surface of the main shaft bearing seat of the thread rolling machine and its corresponding accessories, and the joint surface where the main shaft can be adjusted at a staggered angle, shall be inspected by the coloring method according to the particularly important fixed joint surface. The contact area shall not be less than the requirements in Table 3. The important joint surfaces of the thread rolling machine, such as the joint surface between the fixed spindle seat and the fuselage, the joint surface between the bottom surface of the mounting guide rail and the fuselage, etc., should be closely aligned. All inspections are carried out with a 0.04mm feeler gauge. The allowable insertion depth of the feeler gauge should not be greater than 1/4 of the width of the contact surface, and the cumulative length of the parts between the contact surfaces where feeler gauges can be inserted should not be greater than 1/10 of the circumference. 3.4.3 For thread rolling machines that use cam feed or roller support for the main shaft, the contact area index of the rolling parts shall not be less than 75% of the narrower width (except for the cam return part).
3.4.4 The amount of reverse free travel of handwheels and handles with scale devices should not exceed one turn.
3.4.5 The axial misalignment of the closing gear should not be greater than the requirements in Table 4. Table 4
Pinion rim width
≤50
>50150
>150
Center misalignment
2.5||tt ||4
6
mm
3.4.6. The working sounds of the gear transmission mechanism, electrical and hydraulic components of the thread rolling machine should be uniform, and there should be no irregular impact sounds and periodic screams.
3.4.7 There should be no leakage of oil in hydraulic, lubrication and cooling systems. 3.4.8 Electrical installation should comply with the regulations of GB/5226.1. 3.4.9 The cleanliness of the hydraulic system of the thread rolling machine should comply with the requirements of JB/T9954. 3.5 Hydraulic device quality
3.5.1 The technical requirements of the hydraulic system shall comply with the provisions of GB/T3766. For the hydraulic cylinder in the thread rolling machine, when the nominal pressure is less than 19.6MPa, the test pressure is 1.5 times the nominal pressure; when the nominal pressure is equal to or greater than 19.6MPa, the test pressure is 1.25 times the nominal pressure, both of which must be maintained. Press for 10 minutes. There should be no leakage, damage to parts or other abnormal phenomena. 3.5.2 Hydraulic components used in the hydraulic system should comply with the regulations of GB/T7935. Hydraulic transmission components should not vibrate, crawl, stagnate or have obvious impacts within the working speed range. 3.5.3
3.5.4 When designing the system, the heat of the system should be reduced to a minimum, and the ambient temperature range of the equipment working should be stated. When the ambient temperature is the highest, the system using hydraulic oil, unless otherwise specified , the inlet temperature of the hydraulic pump should not be higher than 60°C, and the 3
equipment should be able to work normally when the ambient temperature is the lowest.
3.6 Appearance quality
JB/T.5201.2—1999
3.6.1 The surface of the thread rolling machine should not have bulges, depressions, roughness and other damages not specified in the drawings. 3.6.2 The edges of thread rolling machine parts and joint surfaces of components should be neat and even, and there should be no obvious misalignment. The gap between the door, cover and the machine should not exceed the requirements in Table 5.
Table 5
Maximum size
E500
>5001000
>1000
Wrong
-||tt| |2
3
position
mm
3.6.3 The external pipelines of electrical circuits, lubrication systems and hydraulic systems should be installed along the outer contour of the thread rolling machine. There should be friction between parts that move relative to it.
3.6.4 Countersunk screws should not protrude from the outer surface of the part; fixing pins should generally protrude slightly from the outer surface of the part; the tail end of the bolt should protrude beyond the nut, but the protruding part should not be too long and uneven. . 3.6.5 The thread rolling machine should have nameplates, operation, instructions, lubrication, and safety signs or signs. Visual symbols should comply with the provisions of JB/T3240. The type and size of the sign should comply with the regulations of GB/T13306. 3.6.6 Various nameplates, labels and fonts on the thread rolling machine should be clear. The fixed position should be obvious, flat, solid and not skewed. 3.6.7 Thread rolling machine painting should comply with the relevant provisions of JB/T1829. 4 Acceptance inspection
4.1 Inspection of basic parameters
Basic parameters should be carried out under no load conditions. 4.2 Dry running test
4.2.1 The continuous dry running time of the thread rolling machine shall not be less than 4 hours. 4.2.2 The two spindles of the thread rolling machine should run in sequence starting from the lowest speed. The running time of each speed should not be less than 20 minutes, and the running time of the highest speed should not be less than 0.5h. Thread rolling machines that use exchange gears, belt drive speed changes and stepless speed changes should be tested at low, medium and high speeds. For hydraulically fed thread rolling machines, the operating time should not be less than 0.5h under the maximum rolling force and maximum rolling time. The movements of all mechanisms of the thread rolling machine should be smooth, flexible, accurate and reliable. The rolling time error should comply with relevant regulations. 4.2.3 During the dry running time, the temperature rise of the rolling bearing should not be greater than 40°C, and the maximum temperature should not be higher than 70°C; the temperature rise of the sliding bearing should not be greater than 30°C, and the maximum temperature should not be higher than 60°C. 4.2.4 Check the flexibility and reliability of starting and stopping of the spindle and feed movement, the reliability and accuracy of the variable speed conversion action, the reliability of the automatic cycle action and semi-automatic cycle action, and the handwheel with the scale device in reverse direction. Quantity. 4.2.5 Check that the working conditions of electrical, hydraulic, lubrication and cooling systems should be normal and reliable. There should be no blockage or leakage in the liquid pipeline. 4.2.6 Check the reliability of safety protection devices and insurance devices. 4.2.7 Check the noise of the thread rolling machine and it should comply with the requirements of JB9972. 4.2.8 Check the oil temperature or temperature rise after the hydraulic system of the hydraulic feed rolling machine continues to operate. When measuring, the thermometer should be as close as possible to the oil suction 4
JB/T5201.2--1999
port. The grade of the thermometer used should not be lower than level 1.5, and the measuring range should not be greater than 100°C. 4.3 Load test
The thread rolling machine should perform the load test by rolling the threaded workpiece specified in the design with the maximum rolling force. The load test should not be less than 20 times, and the actions of all working systems should be coordinated and reliable.
4.4 Working accuracy inspection
The working accuracy inspection of the thread rolling machine should comply with the regulations of JB/T5201.1. 4.5 Overload test
The thread rolling machine rolls the workpiece at 120% of the maximum rolling force for an overload test. The number of tests should not be less than three, and all working system operations should be normal and reliable.
4.6 Accuracy Inspection
4.6.1 Each thread rolling machine should be tested for accuracy after a load test. During the inspection process, adjustments to mechanisms and parts that affect accuracy are not allowed.
4.6.2 The accuracy inspection of the thread rolling machine shall be carried out in accordance with JB/T5201.1, and the last inspection data shall be recorded in the certificate of conformity. 5 Inspection Rules
Type Inspection
5.1
Thread rolling machines that are newly designed or have major changes in structure, material, or process should be tested according to the type test standards. 5.2 Factory inspection
Each thread rolling machine shall be inspected according to the provisions of 4.1, 4.2, 4.3, 4.4 and 4.6 when it leaves the factory. 6
Packaging, marking and transportation
6.1 Packaging should comply with the regulations of JB/T8356.1. 6.2 The packaging, storage and transportation instructions for thread rolling machines should comply with the regulations of GB191.6. Various nameplates, signs and fonts on the thread rolling machine should be clear. The fixed position should be obvious, flat, solid and not skewed. 3.6.7 Thread rolling machine painting should comply with the relevant provisions of JB/T1829. 4 Acceptance inspection
4.1 Inspection of basic parameters
Basic parameters should be carried out under no load conditions. 4.2 Dry running test
4.2.1 The continuous dry running time of the thread rolling machine shall not be less than 4 hours. 4.2.2 The two spindles of the thread rolling machine should run in sequence starting from the lowest speed. The running time of each speed should not be less than 20 minutes, and the running time of the highest speed should not be less than 0.5h. Thread rolling machines that use exchange gears, belt drive speed changes and stepless speed changes should be tested at low, medium and high speeds. For hydraulically fed thread rolling machines, the operating time should not be less than 0.5h under the maximum rolling force and maximum rolling time. The movements of all mechanisms of the thread rolling machine should be smooth, flexible, accurate and reliable. The rolling time error should comply with relevant regulations. 4.2.3 During the dry running time, the temperature rise of the rolling bearing should not be greater than 40°C, and the maximum temperature should not be higher than 70°C; the temperature rise of the sliding bearing should not be greater than 30°C, and the maximum temperature should not be higher than 60°C. 4.2.4 Check the flexibility and reliability of starting and stopping of the spindle and feed movement, the reliability and accuracy of the variable speed conversion action, the reliability of the automatic cycle action and semi-automatic cycle action, and the handwheel with the scale device in reverse direction. Quantity. 4.2.5 Check that the working conditions of electrical, hydraulic, lubrication and cooling systems should be normal and reliable. There should be no blockage or leakage in the liquid pipeline. 4.2.6 Check the reliability of safety protection devices and insurance devices. 4.2.7 Check the noise of the thread rolling machine and it should comply with the requirements of JB9972. 4.2.8 Check the oil temperature or temperature rise after the hydraulic system of the hydraulic feed rolling machine continues to operate. When measuring, the thermometer should be as close as possible to the oil suction 4
JB/T5201.2--1999
port. The grade of the thermometer used should not be lower than level 1.5, and the measuring range should not be greater than 100°C. 4.3 Load test
The thread rolling machine should perform the load test by rolling the threaded workpiece specified in the design with the maximum rolling force. The load test should not be less than 20 times, and the actions of all working systems should be coordinated and reliable.
4.4 Working accuracy inspection
The working accuracy inspection of the thread rolling machine should comply with the regulations of JB/T5201.1. 4.5 Overload test
The thread rolling machine rolls the workpiece at 120% of the maximum rolling force for an overload test. The number of tests should not be less than three, and all working system operations should be normal and reliable.
4.6 Accuracy Inspection
4.6.1 Each thread rolling machine should be tested for accuracy after a load test. During the inspection process, adjustments to mechanisms and parts that affect accuracy are not allowed.
4.6.2 The accuracy inspection of the thread rolling machine shall be carried out in accordance with JB/T5201.1, and the last inspection data shall be recorded in the certificate of conformity. 5 Inspection Rules
Type Inspection
5.1
Thread rolling machines that are newly designed or have major changes in structure, material, or process should be tested according to the type test standards. 5.2 Factory inspection
Each thread rolling machine shall be inspected according to the provisions of 4.1, 4.2, 4.3, 4.4 and 4.6 when it leaves the factory. 6
Packaging, marking and transportation
6.1 Packaging should comply with the regulations of JB/T8356.1. 6.2 The packaging, storage and transportation instructions for thread rolling machines should comply with the regulations of GB191.6. Various nameplates, signs and fonts on the thread rolling machine should be clear. The fixed position should be obvious, flat, solid and not skewed. 3.6.7 Thread rolling machine painting should comply with the relevant provisions of JB/T1829. 4 Acceptance inspection
4.1 Inspection of basic parameters
Basic parameters should be carried out under no load conditions. 4.2 Dry running test
4.2.1 The continuous dry running time of the thread rolling machine shall not be less than 4 hours. 4.2.2 The two spindles of the thread rolling machine should run in sequence starting from the lowest speed. The running time of each speed should not be less than 20 minutes, and the running time of the highest speed should not be less than 0.5h. Thread rolling machines that use exchange gears, belt drive speed changes and stepless speed changes should be tested at low, medium and high speeds. For hydraulically fed thread rolling machines, the operating time should not be less than 0.5h under the maximum rolling force and maximum rolling time. The movements of all mechanisms of the thread rolling machine should be smooth, flexible, accurate and reliable. The rolling time error should comply with relevant regulations. 4.2.3 During the dry running time, the temperature rise of the rolling bearing should not be greater than 40°C, and the maximum temperature should not be higher than 70°C; the temperature rise of the sliding bearing should not be greater than 30°C, and the maximum temperature should not be higher than 60°C. 4.2.4 Check the flexibility and reliability of starting and stopping of the spindle and feed movement, the reliability and accuracy of the variable speed conversion action, the reliability of the automatic cycle action and semi-automatic cycle action, and the handwheel with the scale device in reverse direction. Quantity. 4.2.5 Check that the working conditions of electrical, hydraulic, lubrication and cooling systems should be normal and reliable. There should be no blockage or leakage in the liquid pipeline. 4.2.6 Check the reliability of safety protection devices and insurance devices. 4.2.7 Check the noise of the thread rolling machine and it should comply with the requirements of JB9972. 4.2.8 Check the oil temperature or temperature rise after the hydraulic system of the hydraulic feed rolling machine continues to operate. When measuring, the thermometer should be as close as possible to the oil suction 4
JB/T5201.2--1999
port. The grade of the thermometer used should not be lower than level 1.5, and the measuring range should not be greater than 100°C. 4.3 Load test
The thread rolling machine should perform the load test by rolling the threaded workpiece specified in the design with the maximum rolling force. The load test should not be less than 20 times, and the actions of all working systems should be coordinated and reliable.
4.4 Working accuracy inspection
The working accuracy inspection of the thread rolling machine should comply with the regulations of JB/T5201.1. 4.5 Overload test
The thread rolling machine rolls the workpiece at 120% of the maximum rolling force for an overload test. The number of tests should not be less than three, and all working system operations should be normal and reliable.
4.6 Accuracy Inspection
4.6.1 Each thread rolling machine should be tested for accuracy after a load test. During the inspection process, adjustments to mechanisms and parts that affect accuracy are not allowed.
4.6.2 The accuracy inspection of the thread rolling machine shall be carried out in accordance with JB/T5201.1, and the last inspection data shall be recorded in the certificate of conformity. 5 Inspection Rules
Type Inspection
5.1
Thread rolling machines that are newly designed or have major changes in structure, material, or process should be tested according to the type test standards. 5.2 Factory inspection
Each thread rolling machine shall be inspected according to the provisions of 4.1, 4.2, 4.3, 4.4 and 4.6 when it leaves the factory. 6
Packaging, marking and transportation
6.1 Packaging should comply with the regulations of JB/T8356.1. 6.2 The packaging, storage and transportation instructions for thread rolling machines should comply with the regulations of GB191.
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