Some standard content:
National Standard of the People's Republic of China
Electromagnetic chuck
Electromagnetic chuck
Subject content and scope of applicationbZxz.net
This standard specifies the basic types, parameters and technical conditions of electromagnetic chucks for surface grinders. This standard applies to electromagnetic chucks for surface grinders. The parameters apply to newly designed electromagnetic chucks. 2 Reference standards
GB9061 General technical conditions for metal cutting machine toolsGB5226
General technical conditions for electrical equipment of machine tools
GB1497'Basic standards for low voltage electrical appliances
Basic test methods for low voltage electrical appliances
GB4942.2° Anti-expansion grade for low voltage electrical appliance enclosureJB2670 General rules for precision inspection of metal cutting machine toolsJB794
Heat resistance classification of insulating materials for motors, electrical appliances and transformersSY 1664
Insulating adhesive
JB2326 Method for compiling model of machine tool accessories
7.B 150 013 Technical conditions for anti-rust of machine tools
7B J50011 Technical conditions for machine tool painting
JB3207 General technical conditions for machine tool accessories packaging JB/7.189 Preparation of random technical documents for machine tool accessories 3 Types and parameters
3.1 Basic types and parameters of rectangular electromagnetic chucks See Figure 1. Table 1, State Technical Supervision Bureau 1993-07-23 Approved GB/T14534—93
1994-03-01 implementation
Work table width
GB/T14534-93
National Management Strength
Work table length
Suction cup height
Panel thickness
Screw slot spacing
Panel A
Number of screw slots
7 (pieces)
Screw slot width
Work table width
Working surface length
GB/T14534-—93
Continued Table 1
Suction cup height
3.2 The parameters of the circular electromagnetic suction cup are shown in Figure 2 and Table 2. Panel thickness
Screw slot spacing
Number of screw slots
.2 (pcs)
Nail slot width
Work table diameter
4 Technical requirements
4.1 Geometric accuracy
Suction cup width
Panel thickness
GB/T14534-93
4.1.1 When conducting geometric accuracy inspection, the provisions of JB2670 shall be referred to.
4.1.2 When the measured length is different from the length specified in this standard, the tolerance shall be calculated according to the provisions of Article 2.3.1.1 of JB2670 according to the measurable length. When the conversion result is less than 0.005mm, it shall still be calculated as 0.005mm. 4.1.3 The geometric accuracy inspection items, requirements and inspection methods are shown in Table 3. 4.2 General requirements GB/T 1453493 Inspection items Difference, mm Within 300 Measuring length Flatness of mounting surface Parallelism of flexible table to mounting surface For every increase of 300 Add 0.02 for measuring length Add 309 for measuring length 4.2.1 The design, manufacture and acceptance of the product shall comply with the provisions of GB9061 and GB5226. 4.2.2 The working voltage is DC 110V. When there are special requirements, it is also allowed to design according to other voltages. 4.3 Appearance inspection method Refer to the relevant clauses of JK2670 5. 3. 2. 3 Place a bridge plate on the surface to be inspected with the suction cup, and place a level on it (the level can also be placed directly on the surface to be inspected). Move the bridge plate along the measurement direction of the schematic diagram. Record a horizontal position reading each time the bridge plate is moved. Establish a reference plane through AC on the surface to be inspected and calculate the coordinate value of the measuring point to the reference plane based on the horizontal reading. The error is calculated as the maximum algebraic difference between the coordinate values of each point on the surface to be inspected and the reference plane.
This item can also be checked by other equivalent methods
5. 4. 1. 2
Place the suction cup workbench on the flat plate, and the indicator type directly touches the working surface, and the indicator is moved on the flat plate for inspection.
The error is calculated by the maximum algebraic difference of the indicator value
4.3.1 The magnetic poles should be arranged neatly and evenly, and the working surface should not have cracks, rust, holes, depressions, burrs or other defects that affect performance and appearance.
4.3.2 The maximum allowable values of the surface roughness R of the suction installation surface and the working table surface are 0.8μm and 1.23μm. 4.4 Materials
GB/T 14534-:93
4.4.1 Magnetic parts should be made of pure iron with high magnetic permeability or high-quality carbon steel with a carbon content of less than 0.22%. 4.4.2 Magnetic insulation fillers should be made of copper, lead-tin alloy and other non-magnetic wear-resistant materials. No defects that affect performance are allowed. 4.4.3 Magnetic coils should be wound with enameled copper wire with good insulation performance. The heat resistance level of the sealing and insulation materials should not be lower than Class E specified in IB7941, and the performance should comply with the provisions of SY1664. 4.5 Structure
4.5.1 The coil windings should be arranged neatly, evenly and tightly, the outside of the coil should be tied firmly, the coil should be vacuum-painted and dried, and should be securely sealed in the cup with insulating materials. 4.5.2 The lead-out wires of the suction cup should have good sealing, insulation and anti-breaking measures. 4.5.3 The lead-out connector should have good anti-drop measures. 4.5.4 The heavy-duty suction cup should be equipped with a lifting device. 4.6 Working performance
4.6.1 The suction force per unit area of the work surface (abbreviated as suction force) and the unevenness of suction force should comply with the provisions of Table 4. 4
Electromagnetic suction cup type
The allowable 10% measuring point is 50
The allowable 10% measuring point is 40
4.6.2 The residual magnetic force per unit area of the work surface (abbreviated as residual magnetic force) shall not exceed 10% of the suction force at that point. N/cm2
Uneven suction
4.6.3 The stiffness of the work surface is evaluated by the displacement of the test piece under the specified static load Q, and should comply with the provisions of Table 5. Table 5
Working table length, mm
(diameter)
>315~630
630-- 000
>1 000~1 600
4.7 Electrical performance
Static load
Displacement
4.7.1 Temperature rise When the power is continuously supplied for 6 hours at rated voltage, the temperature rise of the working table shall not be greater than 15℃, and the temperature rise of the coil shall not be greater than 60℃. 4.7.2 Insulation resistance The insulation resistance between the electromagnetic chuck and the power supply lead shall not be less than 5M. 4.7.3 Withstand voltage When conducting a withstand voltage test between the live parts and components of the electromagnetic chuck, surface flashover and insulation breakdown shall not be caused. : 4.7.4 The protection level of the electromagnetic chuck shell should reach 1PX7 level. After the immersion test, the insulation resistance value should still meet the requirements of 4.7.2.
4.7.5 The grounding resistance value between the end point of the chuck protection wire and any exposed conductor parts and components shall not exceed 0.1Ω. The color of the protection wire should be yellow-green.
5 Test method
5.1 The worktable suction, suction unevenness and residual magnetic force test shall comply with the provisions of Table 6. Item
GB/T 14534—93
Testing tools
Tube-shaped force measuring
300N, 0~
30N) test
block (For the provisions of the test
block, see Appendix A)
Testing method
The suction cup is placed on the test bench and energized with the rated voltage. The test block is sucked on the work surface
across
the interlayer,The dynamometer is used to slowly pull the test block vertically to the table surface through the copper ring. The suction force of the working table surface is measured by the maximum indication of the dynamometer when the test block leaves the table surface. The suction unevenness is measured by the difference between the maximum suction force and the minimum suction force on the working table surface. The suction test is carried out within the power off period of the magnetic force whip, and the residual impact force is measured by the suction force when the test block leaves the table surface.
Measurement location
1. Rectangle: Measure at each magnetic isolation layer on three lines within the range of
·% of width and length. When the total number of measuring points exceeds 60 points, the total number of points on the two lines shall not be less than points.
2. Net-shaped annular pole: Measure at two magnetic layers on a radius of 120° on the T-table
surface.
3. Star-shaped pole: Measure at 5--9 points on each star pole about 120° apart on the T-table
surface.
5.2 Workbench surface stiffness test
CB/T14534-93
Should comply with the provisions of Table 7. 5.3 Temperature rise test Inspection tools Test bench (flat plate) Indicator stem (for special test pieces, please refer to the detailed provisions). Test method The suction cups are placed on the test bench. The rated voltage is energized. The test piece is placed on the specified position on the table (A: point 13). 1. The two indicators with non-magnetic contacts are equidistantly and vertically touched to the a and b points of the small axis of the test piece. Zero adjustment is made. A uniformly increasing load of ±100% is applied to the rod in the middle of the test piece. The arithmetical mean of the indicated value at each point. The same method is used to re-test the displacement base of the workbench. The maximum value of the arithmetical mean of the results of two tests at the same point at each of the three points is 5.3.1 The temperature rise of the workbench surface shall comply with the provisions of Article 8.2.2.2 of GB1497. After energizing at the rated voltage for 6 hours, use a point thermometer to measure the difference between the temperature of any point on the suction cup workbench and the ambient air temperature. 5.3.2 The temperature rise of the coil shall comply with Article 5.3.3 of 1339. 1, the temperature rise of electromagnetic coils with insulation layer is generally measured by resistance method. The calculation method of coil temperature rise is detailed in Appendix (. 5.4 The insulation resistance test shall comply with the provisions of Article 6.2 of GB998. Use 500V megger to measure the insulation resistance between the suction cup lead wire and the shell.
5.5 The withstand voltage test shall comply with the provisions of Article 6.3 of GB998. Use 50Hz, 1500V voltage for 1min without surface flashover and insulation i penetration.
5.6 The anti-immersion effect test shall comply with GB 4942. 2 According to the provisions of Chapter 7, the suction cup shall be completely immersed in water (the temperature difference between water and suction cup shall not exceed 5). The water surface shall be more than 150mm above the top of the suction cup. After 30 minutes, take it out to measure the insulation resistance. The conductive ring of the circular electromagnetic suction cup shall not be left without water.
GB/T14534--93
5.7 The resistance value between the end point of the suction cup protection wire and the shell shall be measured with a double-arm bridge in the ground resistance test. 6 Inspection rules
6.1 Factory inspection
The factory inspection items of each product shall include geometric accuracy, performance test (suction, residual magnetic force, insulation resistance, withstand voltage, ground resistance), appearance quality, painting and rust prevention, packaging and matching. 6.2 Type inspection
6.2.1 When conducting type inspection on the product, the geometric accuracy, technical requirements specified in this standard shall be met. All items are required to be inspected 6.2.2 When one of the following situations occurs, type inspection should generally be carried out. a. Trial design and identification of new products or old products for transfer to factory production b. When there are major changes in structure, materials, and processes after formal production, which may affect product performance C. When products that are not frequently produced are produced again; when the national quality supervision agency proposes type inspection requirements 1 Marking and packaging
7.1 The product should be marked with the manufacturer's name and (or) trademark, product model, name, voltage, current (or power) and factory number in a conspicuous position 7.2 The model of the product should comply with the provisions of JB2326 7.3 The anti-rust of the product should comply with the provisions of ZBJ50013 7.4 The painting of the product should comply with the provisions of ZBJ50011, 7.5 The packaging of the product should comply with the provisions of JB3207. 7.6 The random technical documents of the product should include the certificate of conformity, instruction manual and packing list, and the preparation method should comply with the provisions of JB/Z189.
GB/T 14534—93
Appendix A
Test block for suction test
(reference part)
Test block for suction test shall comply with the provisions of this appendix. A1 Drawing
A2 Material
Pure iron for electrical use.
43 Technical requirements
10 ± 0.1
A3.1 The hook shall have sufficient rigidity, and the connection type, material and size with the test block shall be determined by the user. 43.2 The test block shall be lifted by the steel ring to ensure that the center of gravity of the test block passes through the center. 口
A4 Other provisions
When the test block specified in this appendix is not suitable due to the size of the magnetic pole, it is allowed to use test blocks of different shapes with a working area of 1 cm and technical requirements that meet the provisions of this appendix
The test piece for stiffness test shall comply with the provisions of this appendix. B1 Drawing
B2 Material
GB/T14534-93
Appendix B
Test piece for stiffness test
(reference piece)
45 (1G small shaft is allowed to use non-magnetic wear-resistant material) B3 Technical requirements
B3.1 Heat treatment rate HRC40~45.
B3.210 The small shaft and return shaft should be connected by interference fit. Appendix C
Calculation method of coil temperature rise
(reference)
C1 When the average temperature rise of copper coil is determined by the resistance method, it can be calculated as follows: j—— 020n2
(231.5+0..)+(0—02)
Where: p——average temperature rise of coil, ℃ B,——hot temperature of coil,
GB/T14534--93
Gne——surrounding air temperature when coil is hot, C:8.——surrounding air temperature when coil is cold, ℃, R,——hot resistance value of coil, 0;
R—cold resistance value of coil.
Note: Hot resistance must be measured within 10s of power off. Additional remarks
This standard is proposed by the Ministry of Machinery and Electronics Industry of the People's Republic of China. This standard is under the jurisdiction of the National Technical Committee for Standardization of Metal Cutting Machine Tools. This standard was drafted by Yantai Machine Tool Accessories Research Institute.1 The temperature rise of the work surface shall comply with the provisions of Article 8.2.2.2 of GB1497. After energizing at rated voltage for 6 hours, use a point thermometer to measure the difference between the temperature of any point on the sucker work surface and the ambient air temperature. 5.3.2 The temperature rise of the coil shall comply with the provisions of Article 5.3.1 of GB1339. The temperature rise of the electromagnetic coil with an insulating layer is generally measured by the resistance method. The calculation method of the coil temperature rise is detailed in Appendix (. 5.4 The insulation resistance test shall comply with the provisions of Article 6.2 of GB998. Use a 500V megger to measure the insulation resistance between the sucker lead wire and the shell.
5.5 The withstand voltage test shall comply with the provisions of Article 6.3 of GB998. Use 50Hz, 1500V voltage to energize for 1 minute without surface flashover and insulation i penetration.
5.6 The anti-immersion impact test shall comply with GB 4942. 2 According to the provisions of Chapter 7, the suction cup shall be completely immersed in water (the temperature difference between water and suction cup shall not exceed 5). The water surface shall be more than 150mm above the top of the suction cup. After 30 minutes, take it out to measure the insulation resistance. The conductive ring of the circular electromagnetic suction cup shall not be left without water.
GB/T14534--93
5.7 Ground resistance test Use a double-arm bridge to measure the resistance value between the end point of the suction cup protection wire and the shell. 6 Inspection rules
6.1 Factory inspection
The factory inspection items of each product shall include geometric accuracy, performance test (suction, residual magnetic force, insulation resistance, withstand voltage, ground resistance), appearance quality, painting and rust prevention, packaging and matching. 6.2 Type inspection
6.2.1 When conducting type inspection on the product, all items of geometric accuracy and technical requirements specified in this standard shall be inspected. 6.2.2 When one of the following situations occurs, it shall generally be carried out Type inspection. a. Trial determination and appraisal of new products or old products transferred to the factory for production b. After formal production, if there are major changes in structure, materials, and processes that may affect product performance C. When products that are not frequently produced are produced again; when the national quality supervision agency proposes type inspection requirements 1 Marking and packaging
7.1 The product should be marked with the manufacturer's name and (or) trademark, product model, name, voltage, current (or power) and factory number in a conspicuous position 7.2 The model of the product should comply with the provisions of JB2326 7.3 The rust prevention of the product should comply with the provisions of ZBJ50013 7.4 The painting of the product should comply with the provisions of ZBJ50011, 7.5 The packaging of the product should comply with the provisions of JB3207. 7.6 The random technical documents of the product should include certificates of conformity, instruction manuals and packing lists, and the preparation method should comply with the provisions of JB/Z189.
GB/T 14534—93
Appendix A
Test block for suction test
(reference)
Test block for suction test shall comply with the provisions of this appendix. A1 Drawing
A2 Material
Pure iron for electrical use.
43 Technical requirements
10 ± 0.1
A3.1 The hook shall have sufficient rigidity, and the connection type, material and size with the test block shall be determined by the user. 43.2 The test block shall be lifted by the steel ring to ensure that the center of gravity of the test block passes through the center. 口
A4 Other provisions
When the test block specified in this appendix is not suitable due to the size of the magnetic pole, it is allowed to use a test block with a working area of 1 cm and different shapes that meet the technical requirements specified in this appendix
The test piece for stiffness test shall comply with the provisions of this appendix. B1 Drawing
B2 Material
GB/T14534-93
Appendix B
Test piece for stiffness test
(reference piece)
45 (1G small shaft is allowed to use non-magnetic wear-resistant material) B3 Technical requirements
B3.1 Heat treatment rate HRC40~45.
B3.210 The small shaft and return shaft should be connected by interference fit. Appendix C
Calculation method of coil temperature rise
(reference)
C1 When the average temperature rise of copper coil is determined by the resistance method, it can be calculated as follows: j—— 020n2
(231.5+0..)+(0—02)
Where: p——average temperature rise of coil, ℃ B,——hot temperature of coil,
GB/T14534--93
Gne——surrounding air temperature when coil is hot, C:8.——surrounding air temperature when coil is cold, ℃, R,——hot resistance value of coil, 0;
R—cold resistance value of coil.
Note: Hot resistance must be measured within 10s of power off. Additional remarks
This standard is proposed by the Ministry of Machinery and Electronics Industry of the People's Republic of China. This standard is under the jurisdiction of the National Technical Committee for Standardization of Metal Cutting Machine Tools. This standard was drafted by Yantai Machine Tool Accessories Research Institute.1 The temperature rise of the work surface shall comply with the provisions of Article 8.2.2.2 of GB1497. After energizing at rated voltage for 6 hours, use a point thermometer to measure the difference between the temperature of any point on the sucker work surface and the ambient air temperature. 5.3.2 The temperature rise of the coil shall comply with the provisions of Article 5.3.1 of GB1339. The temperature rise of the electromagnetic coil with an insulating layer is generally measured by the resistance method. The calculation method of the coil temperature rise is detailed in Appendix (. 5.4 The insulation resistance test shall comply with the provisions of Article 6.2 of GB998. Use a 500V megger to measure the insulation resistance between the sucker lead wire and the shell.
5.5 The withstand voltage test shall comply with the provisions of Article 6.3 of GB998. Use 50Hz, 1500V voltage to energize for 1 minute without surface flashover and insulation i penetration.
5.6 The anti-immersion impact test shall comply with GB 4942. 2 According to the provisions of Chapter 7, the suction cup shall be completely immersed in water (the temperature difference between water and suction cup shall not exceed 5). The water surface shall be more than 150mm above the top of the suction cup. After 30 minutes, take it out to measure the insulation resistance. The conductive ring of the circular electromagnetic suction cup shall not be left without water.
GB/T14534--93
5.7 Ground resistance test Use a double-arm bridge to measure the resistance value between the end point of the suction cup protection wire and the shell. 6 Inspection rules
6.1 Factory inspection
The factory inspection items of each product shall include geometric accuracy, performance test (suction, residual magnetic force, insulation resistance, withstand voltage, ground resistance), appearance quality, painting and rust prevention, packaging and matching. 6.2 Type inspection
6.2.1 When conducting type inspection on the product, all items of geometric accuracy and technical requirements specified in this standard shall be inspected. 6.2.2 When one of the following situations occurs, it shall generally be carried out Type inspection. a. Trial determination and appraisal of new products or old products transferred to the factory for production b. After formal production, if there are major changes in structure, materials, and processes that may affect product performance C. When products that are not frequently produced are produced again; when the national quality supervision agency proposes type inspection requirements 1 Marking and packaging
7.1 The product should be marked with the manufacturer's name and (or) trademark, product model, name, voltage, current (or power) and factory number in a conspicuous position 7.2 The model of the product should comply with the provisions of JB2326 7.3 The rust prevention of the product should comply with the provisions of ZBJ50013 7.4 The painting of the product should comply with the provisions of ZBJ50011, 7.5 The packaging of the product should comply with the provisions of JB3207. 7.6 The random technical documents of the product should include certificates of conformity, instruction manuals and packing lists, and the preparation method should comply with the provisions of JB/Z189.
GB/T 14534—93
Appendix A
Test block for suction test
(reference)
Test block for suction test shall comply with the provisions of this appendix. A1 Drawing
A2 Material
Pure iron for electrical use.
43 Technical requirements
10 ± 0.1
A3.1 The hook shall have sufficient rigidity, and the connection type, material and size with the test block shall be determined by the user. 43.2 The test block shall be lifted by the steel ring to ensure that the center of gravity of the test block passes through the center. 口
A4 Other provisions
When the test block specified in this appendix is not suitable due to the size of the magnetic pole, it is allowed to use a test block with a working area of 1 cm and different shapes that meet the technical requirements specified in this appendix
The test piece for stiffness test shall comply with the provisions of this appendix. B1 Drawing
B2 Material
GB/T14534-93
Appendix B
Test piece for stiffness test
(reference piece)
45 (1G small shaft is allowed to use non-magnetic wear-resistant material) B3 Technical requirements
B3.1 Heat treatment rate HRC40~45.
B3.210 The small shaft and return shaft should be connected by interference fit. Appendix C
Calculation method of coil temperature rise
(reference)
C1 When the average temperature rise of copper coil is determined by the resistance method, it can be calculated as follows: j—— 020n2
(231.5+0..)+(0—02)
Where: p——average temperature rise of coil, ℃ B,——hot temperature of coil,
GB/T14534--93
Gne——surrounding air temperature when coil is hot, C:8.——surrounding air temperature when coil is cold, ℃, R,——hot resistance value of coil, 0;
R—cold resistance value of coil.
Note: Hot resistance must be measured within 10s of power off. Additional remarks
This standard is proposed by the Ministry of Machinery and Electronics Industry of the People's Republic of China. This standard is under the jurisdiction of the National Technical Committee for Standardization of Metal Cutting Machine Tools. This standard was drafted by Yantai Machine Tool Accessories Research Institute.)+(0—02)
Where: p——Average temperature rise of coil, ℃ B,——Hot temperature of coil,
GB/T14534--93
Gne——Ambient air temperature of coil when hot, C:8.——Ambient air temperature of coil when cold, ℃, R,——Hot resistance value of coil, 0;
R—Cold resistance value of coil.
Note: Hot resistance must be measured within 10s of power off. Additional remarks
This standard is proposed by the Ministry of Machinery and Electronics Industry of the People's Republic of China. This standard is under the jurisdiction of the National Technical Committee for Standardization of Metal Cutting Machine Tools. This standard is drafted by the Yantai Machine Tool Accessories Research Institute.)+(0—02)
Where: p——Average temperature rise of coil, ℃ B,——Hot temperature of coil,
GB/T14534--93
Gne——Ambient air temperature of coil when hot, C:8.——Ambient air temperature of coil when cold, ℃, R,——Hot resistance value of coil, 0;
R—Cold resistance value of coil.
Note: Hot resistance must be measured within 10s of power off. Additional remarks
This standard is proposed by the Ministry of Machinery and Electronics Industry of the People's Republic of China. This standard is under the jurisdiction of the National Technical Committee for Standardization of Metal Cutting Machine Tools. This standard is drafted by the Yantai Machine Tool Accessories Research Institute.
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