Some standard content:
ICS25.120.10
J62
JB
Machinery Industry Standard of the People's Republic of China
JB/T6580.1-1999
Open Presses||tt ||1999-05-14 Release
Technical Conditions
2000-01-01 Implementation
National Machinery Industry Bureau
Release
JB/T6580. 1-1999
Preface
Preface
This standard is a revision of ZBJ62027-89 "Technical Conditions for Open Presses". The technical content of this standard is basically consistent with ZBJ62027-89, and has only been re-edited in accordance with relevant regulations. This standard will be implemented from January 1, 2000. This standard replaces ZBJ62027-89 from the date of implementation. Appendix A of this standard is an appendix to the standard.
Appendix B of this standard is a reminder appendix. www.bzxz.net
This standard is proposed and centralized by the National Forging Machinery Standardization Technical Committee. This standard is drafted by: Neijiang Forging Machine Tool Factory. The main drafter of this standard: Gong Guangyi.
This standard was first released in June 1983.
1 Scope
Machinery Industry Standard of the People's Republic of China
Open press
Technical conditions
JB/T 6580.1--1999||tt| |Police ZBJ62027-89
This standard specifies the technical requirements, test methods, inspection rules, packaging, marking and transportation of open presses. This standard applies to single-column fixed-table presses, open-type fixed-table presses and open-type tilting presses (hereinafter referred to as presses). Other types of open-type presses can be implemented by reference. 2 Referenced standards
The provisions contained in the following standards constitute provisions of this standard through reference 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. GB191—1990
GB/T700—1988
GB/T3766—1983
GB/T5226.1—1996
GB/T7932—1987
GB/T 7935--1987
GB/T 13306--1991
GB/T 14347--1993
JB/T 3240--1999
JB3350--1993| |tt||JB/T 3847—1999
JB/T6580—1993
JB/T 8356.1—1996
JB99681999
3 Technical requirements and test methods|| tt | Equipment Part 1: General technical conditions General technical conditions for pneumatic systems
General technical conditions for hydraulic components
Signboard
Open press type and basic parameters
Forging machinery Visible symbols for operating instructions
Safety technical conditions for mechanical presses
The distribution pattern and size of slots and holes for fastening molds of open presses Precision of open presses
Machine tool packaging technology Conditions
Noise limits for open presses
The drawings and technical documents of the press shall comply with the requirements of this standard, and shall be approved in accordance with the prescribed procedures before they can be put into production. 3.2 Type and parameters
The type and basic parameters of the press should be given priority in accordance with the provisions of GB/T14347. For newly designed presses, the distribution form and size of the grooves and holes used to fasten the mold should comply with the regulations of JB/T3847. 3.3 Accessories and compatibility
3.3.1 The press should be equipped with necessary accessories and spare wearing parts when it leaves the factory. Special accessories are mutually agreed between the user and the manufacturer and can be supplied randomly or ordered separately.
National Machinery Industry Bureau 1999-05-14 approved 2000-01-01 actual trip
1
JB/T 6580.1--1999
3.3.2 Press Accessories, ancillary devices, etc. should comply with relevant regulations. Outsourced accessories should obtain certification and be installed on the press for operational testing.
3.3.3 The press should be equipped with the conditions for installing an automatic feeding device. 3.4 Safety and Protection
3.4.1 The press should have reliable personal safety protection devices and should comply with the regulations of JB3350. 3.4.2 The operation of the press must be safe and reliable, and continuous strokes are not allowed to occur when a single stroke is specified. 3.4.3 The operation of the press should be light and flexible. The operating force of the handle and handwheel that is frequently used (including single-stroke operation) should not be greater than 40N; the operating force of the long lever foot pedal should not be greater than 60N; The operating force of the foot switch should not be greater than 40N. Exposed footrests should be protected. 3.4.4 When the motor or flywheel is required to rotate in one direction, the direction of rotation arrow should be marked on the appropriate location. 3.4.5 The parts that are easy to loosen when the press is running should be equipped with reliable anti-loosening devices. Exposed rotating parts (such as gears, flywheels, etc.) that affect work safety should have protective devices. 3.4.6 The press should have a reliable overload safety device. This device should be able to ensure the normal operation of the press when it is fully loaded; when it is overloaded, it should be able to protect other parts from being damaged first. 3.4.7 The adjustment of the closing height should be flexible, and the locking of the connecting rod and the adjusting screw should be reliable. 3.4.8 The tilting mechanism of the tilting press should be adjusted easily and smoothly. It should be able to lock reliably after adjustment. 3.5 Rigidity
3.5.1 The press should have sufficient rigidity. 3.5.2 The angular stiffness of the fuselage should not be lower than its allowable angular stiffness. The allowable angular stiffness is calculated according to formula (1): [CJ-0.001P.
where: [C, J——the allowable angular stiffness of the fuselage, kN/μrad; P,——the nominal force of the press ,kN.
3.5.3 The test method of fuselage angular stiffness should refer to Appendix B (Appendix of Prompt). 3.6 Crankshaft stop position
(1)
The working mechanism and control mechanism of the press should be coordinated. When the working stroke is completed, the crankshaft should stop reliably at the top dead center, and its deviation should not be greater than 5° for rigid clutches and generally not greater than 5° for friction clutches. 3.7 Crankshaft braking angle
For friction clutch driven presses, the crankshaft braking angle should comply with relevant regulations. 3.8 Lubrication
The press should have a reliable lubrication device to ensure normal lubrication of all operating parts. The sliding guide rail parts generally should have dust-proof measures. 3.9 Anti-leakage
The oil and gas in hydraulic, lubrication and pneumatic systems should not leak or leak. For non-circulating lubrication parts, there should be an oil collection and recovery device. 3.10 Signs
The press should have a nameplate and various signs or signs with instructions, lubrication, operation, safety and other requirements. The type, size, material, technical requirements, etc. of the sign shall comply with the provisions of GB/T13306. The visual symbols on the sign should comply with the provisions of JB/T3240. Signs should be straight, securely stapled in an obvious and appropriate location, and should remain legible. 3.11 Casting, forging and welding parts
2
JB/T6580.11999
3.11.1 All cast iron parts, steel castings, forgings, welding parts and non-ferrous metal castings on the press , all should comply with current standards. Defects that do not affect use and appearance are allowed to be repaired in accordance with the prescribed technical documents under the condition of ensuring quality. 3.11.2 The working surfaces of important cast parts, such as gear tooth surfaces and sliding surfaces of sliding bearings, slide blocks and guide rails, should not have defects such as pores, shrinkage holes, trachoma, slag holes and segregation. 3.11.3 The fuselage and crankshaft should have proof of material properties. 3.11.4 Important spare parts or welded parts such as the fuselage, slider, connecting rod, work table, large gear and flywheel should be aged. 3.12 Parts processing
3.12.1 Parts processing should comply with the requirements of design, technology and relevant standards. The machined surface should be free of burrs, marks and other mechanical damage. Unless otherwise specified, sharp edges should be blunted. 3.12.2. The scraped sliding surface and important plane a) The contact condition of the scraped bearing bush and bushing should be checked in the actual working position (for example, the bearing bush should be pressed into the bearing bush seat). b) The scraping points on the working surfaces of the bearing bush and guide rail should be even. When using inspection rods or matching parts for color inspection, the number of contact points per 25mm × 25mm area should not be less than the requirements in Table 1, based on the average calculation within an area of ??300cm2 (if less than 300cm2, the average calculation will be based on the actual area). The scraping point of the bearing bush should be inspected within the working surface (not less than 120°) (when the oil groove is included, the width of the two oil grooves at the oil planting area is not assessed). c) For important working surfaces processed by scraping and grinding, such as the fuselage working surface, the lower surface of the slider, the upper and lower surfaces of the worktable, etc., when the coloring method is used to jointly test the flatness with the inspection plate, the contact should be uniform, and On average, the number of contact points per 25mm×25mm area should not be less than 6 points.
Table 1
Guide rail width
mm
<100
>100
Note
Bearing diameter||tt ||mm
<120
>120
1 The number of contact points on the inner surface of the upper bearing shell of the connecting rod and the displacement guide rail can be reduced by two points accordingly. 2. The contact surface of two mating parts is a set of guide rails with different dimensions, and is inspected according to the specified number of points for wide guide rails. 3 The above regulations do not apply to non-bearing bushings and tension pad guide rails. 3.12.3 Machined sliding surface
Number of contact points
>8
>6
Sliding guide rail processed by fine planing, grinding or other mechanical processing methods, For bearing bushes, bushings, etc., use the coloring method to check their contact, and the contact should be uniform. The cumulative value of the contact area should not be less than 70% of the axial length of the bushing, bearing bush and the full length of the guide rail, and should not be less than 50% of the width of the guide rail.
3.12.4 Contact surface of the ball head
The contact between the ball head of the adjusting screw and the ball head seat should be uniform, and the contact area should not be less than 50%. 3.12.5 Wear-resistant measures
Wear-resistant measures should be taken for important motion pairs such as sliders, crankshafts, rotating keys, and ball heads. 3.12.6 Flywheel static balance
The flywheel of the press should be statically balanced and calibrated. The allowable unevenness moment should be calculated according to formula (2): JB/T6580.1—1999
[M]=6.3G/or
where: [M——the allowable unevenness of the flywheel Balance moment, gmm; 6.3 balance accuracy level, mm*rad/s;
a——flywheel operating angular speed, rad/s; G flywheel mass, g.
3.12.7 Flywheel runout
The circular runout error of the flywheel should not be greater than the requirements in Table 2. Table 2
Flywheel diameter
≤1000
>1000
3.13
Hydraulic, pneumatic systems and electrical equipment
Hydraulic system|| tt||3. 13.1
path
0.05
0.08
park
jump towards
jump
move|| tt||error
difference
end
0.10
0.15
face
(2)
mm|| tt||The hydraulic system of the press should comply with the regulations of GB/T3766. Hydraulic components used in hydraulic systems should comply with the regulations of GB/T7935.
3.13.2 Pneumatic system
The pneumatic system of the press should comply with the regulations of GB/T7932. 3.13.3 Pressure vessels
The design, manufacture, and acceptance of pressure vessels must comply with relevant standards and regulations. 3.13.4 Electrical equipment
The electrical equipment of the press shall comply with the provisions of GB/T5526.1. 3.14 Assembly
3.14.1 The press shall be assembled according to the assembly process regulations. Parts assembled to the press should meet quality requirements. .It is not allowed to install chips, sleeves, etc. that are not specified in the drawing. 3.14.2 The cleanliness of the press should comply with relevant regulations. 3.14.3 The fixed joint surface of the guide rail and the fuselage should be tightly fitted. After tightening, use a 0.05mm feeler gauge to inspect. 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 where the feeler gauge can be inserted between the contact surfaces should not be greater than 1/10 of the circumference. 3.14 .4
After the flywheel is installed, the static circular runout of the flywheel should be checked, and the runout error should not be greater than the requirements in Table 3. Table 3
flywheel diameter
1000
>1000
diameter
static
0.10
0.15||tt| |state
toward
circle
jump
moving
public
end
difference
0.20
0.30
surface
mm
3.15 noise
JB/T6580.1-1999
The sound response of the press during dry operation normal. The noise limit value should comply with the provisions of JB9968, and the measurement method should comply with the provisions of the relevant standards.
3.16 Appearance
3.16.1 The outer surface of the press should not have bulges, depressions or roughness not specified in the drawings. The joints such as cover plate and casing should be smooth. Exposed pipes and lines should be arranged neatly and firmly. There should be no obvious misalignment of the exposed bonding surfaces. 3.16.2 The painting of the unprocessed surfaces of all parts and accessories on the press should comply with the relevant standards. 3.16.3
The main exposed processing surfaces should be free from silicon bumps, scratches and rust. 4 Inspection Rules
4.1 General Inspection Rules
a) Each press must pass the factory inspection by the manufacturing inspection department before it can leave the factory. b) For trial production appraisal of new products or old products transferred to factory production, type inspection should be carried out in accordance with relevant regulations. 4.2 Factory inspection items
The press must undergo factory inspection or testing according to the following items: a) Basic parameter inspection;
b) Basic performance inspection;
c) Assembly quality inspection|| tt||d) Dry running test:
e) Noise inspection;
f) Load test;
g) Accuracy inspection;
h) Appearance inspection;| |tt||D) Packaging inspection.
4.3 Basic parameter inspection
The basic parameters of the press are allowed to be randomly inspected by batch. The number of random inspections in each batch should not be less than 10%, and the tolerance should not be greater than the provisions of Table 4. Table 4
Serial number
2
3
4
Note
Inspection items
Slider stroke||tt ||Maximum closing quotient
Sealing height adjustment amount
Number of strokes
1 The fourth error in the table should be checked when the power supply is normal and when running dry. 2The tolerance conversion result is less than! Those are still counted as 1. 4.4 Basic performance inspection
unit
mm
min-
charge
difference
±1% of the stroke plate||tt| |% of size
*% of adjustment amount
*% of number of strokes
JB/T6580.1-1999
Before the dry running test or when the press is empty During the operation test, basic performance tests should be carried out according to the following items: a) Test the reliability of the safety device;
b) Various standardized operation tests of the slider operation to test the flexibility and reliability of its action; c) Closed height adjustment test to test its flexibility and the reliability of the connecting rod locking device; d) Stroke length adjustment test to test its flexibility and reliability; e) Test the flexibility and reliability of the stretching pad action ;\Check the accuracy of the indicators of the slider stroke, closing height and stretch pad stroke; g) Check the accuracy of the counter;
h) Check the reliability of the balancer;
i) Check the flexibility and reliability of the accessory devices: j) Check the reliability of the lubrication device;
k) Check the reliability of the pneumatic device;
D Check the reliability of the hydraulic device: ||tt| |m) Check the reliability of electrical devices.
4.5 Assembly quality inspection
Inspect the assembly quality of the press according to 3.14. 4.6 Dry running test
4.6.1 Dry running time
4.6.1.1 For presses using rigid couplings, the dry running time should not be less than 2h, of which the continuous stroke running time should not be less than 1.5h, the operating time of a single trip should not be less than 0.5h. 4.6.1.2. For presses using friction clutches, the idle running time should not be less than 4 hours, of which the continuous stroke operation time should not be less than 2 hours, and the single stroke operation time should not be less than 1.5 hours. 4.6.2 The temperature rise and maximum temperature of bearings, guide rails, clutches and brakes shall be measured with a point thermometer at the measurable parts that generate the highest heat during the idle running time. The temperature rise and maximum temperature shall not exceed the following regulations: || tt||a) The temperature rise of the sliding bearing should not be greater than 35℃, and the maximum temperature should not be higher than 70℃; b) The temperature rise of the rolling bearing should not be greater than 40℃, and the maximum temperature should not be higher than 70℃: c) The sliding guide rail The temperature rise should not be greater than 15°C, and the maximum temperature should not be higher than 50°C. d) The temperature rise of friction clutches and brakes (including band brakes) should not be greater than 70°C, and the maximum temperature should generally not be higher than 100°C. 4.6.3 Connection frequency
When the single stroke operation is standardized, the connection frequency should not be lower than the requirements in Table 5. Table 5
Number of strokes
Connection degree
Note
min-
%
20
70| |tt||1 When the number of strokes is greater than 60min-\, the number of engagements is calculated as 30 times per minute. 2 The frequency between two adjacent levels in the table is determined by the insertion method 6
40
60
60
50
4.7 Noise test
JB/T 6580.1-1999
Test the continuous noise L and impulse noise LI (both A-weighted sound pressure levels) at the specified position according to the provisions of 3.15 4.8 load test
4.8.1 Full load test
4.8.1.1 Each press should be tested at full load. 4.8.1.2 For the full load test method, one of the following should be selected based on the manufacturer's conditions and the requirements of the superior or user: a) Use the punching method for the full load test. The number of tests should not be less than three. The calculation of the punching force and the requirements for the mold and test pieces are specified in Appendix A (Appendix of the Standard).
b) Use the precision pressed copper rod method or other corresponding methods to conduct a simulated load test. The test time should not be less than 2 hours, of which the single and continuous strokes should not be less than 1 hour each. The test requirements and methods should comply with relevant regulations. 4.8.1.3 If the simulated load test is adopted, no additional dry running test is required. 4.8.2 Overload test
For new products or modified design products, overload tests should be conducted at 120% of the nominal force, and the number of times should not be less than five times. For products with hydraulic overload protection devices, the correctness and reliability of their operation should be assessed according to design regulations. 4.9 Accuracy inspection
4.9.1 The accuracy of the press shall be inspected after the full load test and shall comply with the provisions of JB/T6580. 4.9.2 Before leaving the factory, the total clearance of the force-applying mechanism of the press should be inspected. The test method should be in accordance with relevant regulations, and the value should not exceed the requirements in Table 6. Table 6
Structural form
Total clearance
Note: P press nominal force, kN.
4.10 Appearance inspection
The appearance inspection of the press shall comply with the provisions of 3.16. 4.11 Packaging inspection
Shaft type
Qu
5.jo.tP
0.8+
100
Complies with the provisions of Chapter 5. 5 Marking, Packaging and Transportation
5.1 Anti-rust
Non-crankshaft type
12.fo.1P
3.2+
100
The rust prevention of the externally processed surfaces of press parts, components, accessories and spare parts should comply with the provisions of relevant standards. 5.2 Packaging, marking and transportation
mm
The packaging and marking of the press and its components should comply with the regulations of JB/T8356.1 and GB191 and the relevant transportation and loading requirements. 5.3 Random technical documents
Each press should be supplied with the following technical documents: a) Instructions for use;
b) Certificate of conformity;
c) Packing list.
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