Some standard content:
Mechanical Industry Standard of the People's Republic of China
Technical Requirements for Notching Machines
1 Subject Content and Scope of Application
JB/T5349.1—1991
This standard specifies the technical requirements, test methods, inspection rules and marking, packaging, transportation and storage of notching machines. This standard is applicable to various internal positioning and external positioning precision punching machines. 2 Reference standards
GB5083
GB5226
ZBK90001
JB/T5349.2
JB/T5349.3
JB4203
JB2554
JB2131
JB2855
JB1829
JB3623
3 Technical requirements
General principles for safety and sanitation design of production equipment
General technical conditions for electrical equipment of machine tools
General technical conditions for control equipment of special electrical equipment Basic requirements for punching machines Parameters
Accuracy of notching machine
Safety technical conditions for forging machinery
Rust prevention technical conditions for machine tools
General conditions for hydraulic components and general technical conditions for pneumatic transmission Technical conditions for machine tool painting
General technical conditions for forging machinery
Accuracy of involute cylindrical gears
Product label
Method for measuring noise of forging machinery
3.1 General technical requirements
3.1.1 The notching machine shall comply with the requirements of this standard and be manufactured according to the drawings and technical documents approved by the prescribed procedures. 3.1.2 The basic parameters of the notching machine shall comply with the provisions of JB/T5349.2. 3.1.3 All supporting parts shall comply with the relevant standards or regulations, have a certificate of conformity, and shall be tested for operation on the notching machine to prove good quality.
3.1.4 The notching machine shall have sufficient rigidity. The permissible angular stiffness value and test method of the machine body shall be implemented in accordance with Appendix A. 3.1.5 The operation of the notching machine shall be easy, and the operating force of the mechanical pedal device shall not be greater than 80N, and the manual operating force shall not be greater than 50N. 3.1.6 The operation of the operating mechanism, working mechanism and indexing mechanism shall be coordinated. When the working stroke stops, the slider shall stop within the corresponding crank angle of 20° before and after the top dead center. The phenomenon of punching one more slot or one less slot is not allowed. 3.1.7 The design and manufacture of the notching machine must comply with the relevant provisions of GB5083 and JB4203. 3.1.8 The notching machine shall have an emergency stop button and work reliably, and shall have a reliable safety device. The device shall ensure the normal operation of the notching machine when fully loaded; when overloaded, it shall ensure that other parts will not be damaged first. 3.1.9 The pedal device and the exposed rotating parts that affect the working safety (such as gears, flywheels, etc.) shall have protective devices. Parts that are easy to loosen during operation shall have reliable anti-loosening devices. 3.1.10 The adjustment of the closing height should be flexible. The locking device of the connecting rod and the adjusting screw should be reliable. Approved by the Ministry of Machinery and Electronics Industry on June 28, 1991 and implemented on July 1, 1992
JB/T5349.11991
The electrical control device of the precision punching machine should comply with the relevant provisions of ZBK90001. 3.1.11
3.1.12 Technical requirements for additional devices of the notching machine. 3.1.12.1 The phenomenon of notching not in accordance with the selected program shall not occur during gap notching. 3.1.12.2 The stepping amount of the radial feed device of the indexing seat and the tangential feed device of the mold must meet the design requirements during step feeding. 3.1.12.3 When using the first slot adjustment mechanism, it should have a safety interlock that prevents the main motor from starting. 3.1.12.4 The automatic tablet pressing and unloading device must be coordinated with the precision punching action. 3.1.12.5 The phase angle correction mechanism of the indexing shaft should be able to correct the phase angle error of the indexing shaft to no more than ±25. 3.1.13 The slotting machine should have various signs or symbols indicating lubrication, safe operation and other requirements. For parts such as motors and flywheels that require unidirectional rotation, arrows indicating the correct direction of rotation should be marked in conspicuous locations. The product's signs, nameplates and logos should comply with the relevant provisions of JB8. 3.1.14 The lubrication device should be able to ensure that all operating parts are properly lubricated. 3.1.15 The slotting machine should be equipped with special tools, accessories and spare wearing parts when leaving the factory. Special accessories are negotiated by the user and the manufacturer. 3.2 Technical requirements for parts
3.2.1 The main parts of important parts, such as gear tooth surfaces, sliding bearings, sliding surfaces of sliders and guide rails, and cylinder sealing surfaces, should not have defects such as pores, shrinkage cavities, slag inclusions and segregation. The important castings of the machine body, sliders, guide rail arms and indexing seats should be aged. 3.2.2 The fuselage and crankshaft should have proof of material properties that meet the design requirements. 3.2.3 The movement accuracy of the exchange gear should not be lower than Grade 5 in JB179. If there are special requirements, it shall be decided by negotiation between the user and the manufacturer. 3.2.4 The ratchet indexing error of the notching machine using the ratchet indexing mechanism shall not exceed ±30”3.2.5 The scraping points on the working surface of the guide rail and split bearing shall be uniform. For color inspection, the average calculation within the 300cm area (calculated according to the actual area when less than 300cm) should ensure that the number of contact points within the 25mm×25mm area shall not be less than 6 to 8 points, and the minimum number of points within the individual 25mmX25mm area shall not be less than 3 points. The split bearing shall be inspected in the actual working position, and only the highest and lowest points are allowed to be inspected within 60° on both sides. 3.2.6 The diameter tolerance of the slider die handle hole shall not be less than IT7. When using rolling guides, the steel guide surface shall be in uniform contact with the rolling block, and the surface hardness of the guide shall not be less than HRC61.|| tt||3.2.7 Flywheel, clutch and brake components should be subjected to static balance test when the speed reaches 500r/min or above. 3.3 Assembly technical requirements
3.3.1 The quality requirements of electrical equipment shall comply with the provisions of GB5226 and ZBK90001. 3.3.2 Hydraulic and pneumatic components shall comply with the provisions of JB2131, and the hydraulic and pneumatic systems of machine tools are not allowed to have latent leakage. 3.3.3 The noise of the notching machine shall comply with the relevant provisions of JB3623, and its noise sound pressure level shall not exceed 85dB (A). 3.3.4 The fixed joint surface between the guide rail and the fuselage shall be tightly fitted. After tightening, it shall be checked with a 0.05mm feeler gauge. Only a part not exceeding 10% of the total length of the joint surface is allowed to be inserted, and the insertion depth shall not exceed the width of the guide rail. 20% of the degree 3.3.5 The lower hemispherical surface of the adjusting screw and the ball head seat are in uniform contact, and the contact area is not less than 50% of the required contact surface. 3.3.6 The sliding guide rails, bushings or split bearings and other matching parts should be inspected by the coloring method during assembly, and the contact should be uniform. The cumulative value of the contact area of the guide rails should be no less than 70% in length and no less than 50% in width. For bushings or split bearings, the cumulative value of the axial contact length should be no less than 70%.
3.3.7 The axial misalignment of the meshing gears shall not exceed 1mm, and diagonal contact shall not occur when inspected by the coloring method. 3.3.8 For notching machines using a ratchet indexing system, the clearance between the pawl and the ratchet seat shall not exceed 0.02mm. 3.3.9 After the flywheel is installed, the circular runout of the flywheel should be checked, and its runout The radial error is not more than 0.10mm; the end face error is not more than 0.20mm. 3.4 Appearance requirements
3.4.1 The outer surface of the notching machine should not have protrusions, depressions or roughness not specified in the drawings. 3.4.2 The joints of the cover plate, cover shell, etc. should be flat, the exposed pipes and lines should be arranged neatly and firmly, and the exposed joint surfaces should not have obvious misalignment.
3.4.3 The rust prevention and painting of the notching machine should comply with the provisions of JB2554 and JB2855. 158
4 Test methods and inspection rules
4.1 Inspection rules
JB/T5349.1—1991
Each notching machine must be inspected by the inspection department of the manufacturer in accordance with this standard, and can only be shipped after passing the inspection. New products or modified design products should be subjected to type tests. 4.2 Factory inspection items
The precision punching machine shall be inspected or tested according to the following items before delivery. a.
Inspection of basic parameters;
Inspection of basic performance;
Idle running test;
Load test;
Precision inspection;
Appearance inspection;
g: Packaging inspection.
Basic parameter inspection
The basic parameter error of the notching machine shall not be greater than that specified in Table 1. Table 1
Clearing stroke
Inspection items
Maximum closing height
Clearing height adjustment amount
Maximum number of strokes of the slider per minute
Center distance between the clearing die handle hole and the indexing axis
Basic performance test
The notching machine shall be inspected according to the following items before or during the idle running test: a.
Various standard operation tests of the slider operation to test its flexibility and reliability; the most
closed height adjustment test to test its flexibility and the reliability of the connecting rod locking device: the indexing accuracy and reliability of the indexing system; the flexibility and reliability of the auxiliary device; the reliability of the lubrication device:
the reliability of the pneumatic device;
the reliability of the electrical equipment;
the reliability of the safety device.
4.5 Idle operation test
4.5.1 The idle operation time of the slider is not less than 1h when the stroke number is 70% of the maximum stroke number, and the running time in the working state (without punching) is not less than 1.5h.
JB/T5349.1-1991
4.5.2 During the idle operation time, use a point thermometer to measure the measurable part with the highest heat generation of the part, and its temperature rise and maximum temperature shall not exceed the provisions of Table 2.
Sliding bearing
Rolling bearing
Clean guide machine
Moving guide rail
Friction clutch
Brake
4.6 Load test
Maximum temperature
During the load test, the minimum rated number of notches should be used. For variable speed precision punching machines, the number of punches should be selected according to the diameter of the punching sheet and the number of notches as specified in the relevant technical documents. The number of test pieces should not be less than 3. 4.7 Accuracy inspection
The accuracy inspection of the punching machine should comply with the provisions of JB/T5349.3. 4.8 Appearance inspection
Before packaging, the notching machine should comply with the appearance quality inspection requirements specified in Article 3.4 of this standard. 4.9
Overload test
The overload test should be carried out at 120% of the nominal force, and the number of tests should not be less than 3 times. Flashing is not allowed during the test. The calculation of the blanking force and the requirements for the test die are shown in Appendix B. 4.10 Noise test
The noise of the notching machine shall comply with the relevant provisions of JB3623, and its noise sound pressure level shall not exceed 85dB (A). 5 Packaging, marking, transportation
5.1 Packaging, marking, transportation
The packaging, marking, and transportation of the notching machine and its components shall comply with the provisions of Section 8 of JB1829. The label shall at least include the following contents: product name;
Product model:
Product standard code;
Factory number;
Year and month of production;
Manufacturer name and location.
Random technical documents
Each notching machine shall be supplied with the following technical documents: a.
Instruction manual:
Certificate of conformity;
Packing list.
A1 Allowable angular stiffness of the fuselage
JB/T5349.11991
Appendix A
Angular stiffness of the notching machine fuselage and its test method (supplement)
The angular stiffness of the notching machine fuselage should not be lower than its allowable angular stiffness. The allowable angular stiffness of the fuselage is recommended to be calculated according to formula (A1): [c.]=0.001P
Where, [c.]-
allowable angular stiffness of the fuselage, kN/urad;
P,—nominal force of the notching machine, kN.
A2 Test method of angular stiffness of the fuselage
Make the slider of the notching machine in the lower adjustment position and the lower stroke position. Place a hydraulic loader in the middle of the work surface, and place two sets of dial gauge holders and dial gauges (A1, A2 and B1, B2) on both sides of the work surface according to the position A1 in Figure. The dial gauge probes are vertically touching the plane in front of the fuselage column. The distance between the two dial gauge probes in each set is L (equivalent to the length of the fuselage guide rail). After gradually loading the hydraulic loader to full load, obtain the reading difference of the two dial gauges on each set of holders. 1-Hydraulic loader,
4Dial gauge B1,
2—Dial gauge A2;
5—Dial gauge B2
3-Dial gauge Al,bZxz.net
6—Dial gauge holder
Schematic diagram of testing fuselage angular stiffness
JB/T5349.1—1991
Load three times in the same way, and take the arithmetic mean of the absolute values of the differences in the six dial gauge readings as the angular deformation of the fuselage (^α) calculated according to formula (A2):
Ab=Ab+Ab:+Ab,+Ab+Abs+Abs
a~tgAa=
Where: Aa-—angular deformation of the fuselage, μrad, △b, Ab. The absolute value of the difference in the readings of the two dial gauges on each set of gauge holders, mm; L—the distance between the two dial gauge contacts on the gauge holder, mm. The measured angular stiffness of the fuselage is calculated according to formula (A3): C
In the formula; C, fuselage angular stiffness, kN/μrad; P. Nominal force of the precision punching machine, kN
△α——angular deformation of the fuselage, μrad. P
Appendix B
Calculation of blanking force and requirements for punching dies
(Supplement)
B1 Calculation formula of blanking force
Blanking force is calculated according to formula B1;
In the formula, P—specimen blanking force, N,
S—specimen perimeter length, mm;
—specimen thickness, mm;
t—specimen material shear strength limit, MPa; g—specimen material tensile strength limit, MPa. B2 Requirements for punching dies
The punching die used to test the nominal pressure of the notching machine shall meet the following requirements: The shear angle of the punch shall be 0°.
The clearance between the punch and the die shall be less than one tenth of the thickness of the test piece. 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 Wuhu Electrical Machinery Factory. The main drafters of this standard were Dai Weiguo and Dai Qingqiu. 162—Nominal force of notching machine, kN.
A2 Test method of fuselage angular stiffness
Put the slider of notching machine in the lower adjustment position and the lower stroke position. Place a hydraulic loader in the middle of the work surface, and place two sets of dial gauge seats and dial gauges (A1, A2 and B1, B2) on both sides of the work surface according to the position of Figure A1. The dial gauge probes are vertically touching the plane in front of the fuselage column. The distance between the two dial gauge probes in each group is L (equivalent to the length of the fuselage guide rail). After gradually loading the hydraulic loader to full load, obtain the difference in readings of the two dial gauges on each set of seats. 1-Hydraulic loader,
4Dial gauge B1,
2—Dial gauge A2;
5—Dial gauge B2
3-Dial gauge Al,
6—Dial gauge holder
Schematic diagram of testing fuselage angular stiffness
JB/T5349.1—1991
Load three times in the same way, and take the arithmetic mean of the absolute values of the differences in the six dial gauge readings as the angular deformation of the fuselage (^α) calculated according to formula (A2):
Ab=Ab+Ab:+Ab,+Ab+Abs+Abs
a~tgAa=
Where: Aa-—angular deformation of the fuselage, μrad, △b, Ab. The absolute value of the difference in the readings of the two dial gauges on each set of gauge holders, mm; L—the distance between the two dial gauge contacts on the gauge holder, mm. The measured angular stiffness of the fuselage is calculated according to formula (A3): C
In the formula; C, fuselage angular stiffness, kN/μrad; P. Nominal force of the precision punching machine, kN
△α——angular deformation of the fuselage, μrad. P
Appendix B
Calculation of blanking force and requirements for punching dies
(Supplement)
B1 Calculation formula of blanking force
Blanking force is calculated according to formula B1;
In the formula, P—specimen blanking force, N,
S—specimen perimeter length, mm;
—specimen thickness, mm;
t—specimen material shear strength limit, MPa; g—specimen material tensile strength limit, MPa. B2 Requirements for punching dies
The punching die used to test the nominal pressure of the notching machine shall meet the following requirements: The shear angle of the punch shall be 0°.
The clearance between the punch and the die shall be less than one tenth of the thickness of the test piece. 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 Wuhu Electrical Machinery Factory. The main drafters of this standard were Dai Weiguo and Dai Qingqiu. 162—Nominal force of notching machine, kN.
A2 Test method of fuselage angular stiffness
Put the slider of notching machine in the lower adjustment position and the lower stroke position. Place a hydraulic loader in the middle of the work surface, and place two sets of dial gauge seats and dial gauges (A1, A2 and B1, B2) on both sides of the work surface according to the position of Figure A1. The dial gauge probes are vertically touching the plane in front of the fuselage column. The distance between the two dial gauge probes in each group is L (equivalent to the length of the fuselage guide rail). After gradually loading the hydraulic loader to full load, obtain the difference in readings of the two dial gauges on each set of seats. 1-Hydraulic loader,
4Dial gauge B1,
2—Dial gauge A2;
5—Dial gauge B2
3-Dial gauge Al,
6—Dial gauge holder
Schematic diagram of testing fuselage angular stiffness
JB/T5349.1—1991
Load three times in the same way, and take the arithmetic mean of the absolute values of the differences in the six dial gauge readings as the angular deformation of the fuselage (^α) calculated according to formula (A2):
Ab=Ab+Ab:+Ab,+Ab+Abs+Abs
a~tgAa=
Where: Aa-—angular deformation of the fuselage, μrad, △b, Ab. The absolute value of the difference in the readings of the two dial gauges on each set of gauge holders, mm; L—the distance between the two dial gauge contacts on the gauge holder, mm. The measured angular stiffness of the fuselage is calculated according to formula (A3): C
In the formula; C, fuselage angular stiffness, kN/μrad; P. Nominal force of the precision punching machine, kN
△α——angular deformation of the fuselage, μrad. P
Appendix B
Calculation of blanking force and requirements for punching dies
(Supplement)
B1 Calculation formula of blanking force
Blanking force is calculated according to formula B1;
In the formula, P—specimen blanking force, N,
S—specimen perimeter length, mm;
—specimen thickness, mm;
t—specimen material shear strength limit, MPa; g—specimen material tensile strength limit, MPa. B2 Requirements for punching dies
The punching die used to test the nominal pressure of the notching machine shall meet the following requirements: The shear angle of the punch shall be 0°.
The clearance between the punch and the die shall be less than one tenth of the thickness of the test piece. 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 Wuhu Electrical Machinery Factory. The main drafters of this standard were Dai Weiguo and Dai Qingqiu. 162
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