Some standard content:
1 Scope
Machinery Industry Standard of the People's Republic of China
CNC Vertical Lathe
Technical Conditions
This standard specifies the technical requirements for the design, manufacture and acceptance of CNC vertical lathes. JB/T 9934.2--1999
Replaces ZBJ53014-89
This standard applies to general-purpose CNC vertical lathes with a maximum turning diameter of 630 to 5000mm. Vertical turning machining centers can refer to it.
2 Referenced Standards
The provisions contained in the following standards constitute the provisions of this standard through reference in this standard. When this standard is published, the versions shown are valid. All standards will be revised, and parties using this standard should explore the possibility of using the latest versions of the following standards. GB/T9061—1988 General technical requirements for metal cutting machine tools GB/T5226.1—1996 Electrical equipment for industrial machinery Part 1: General technical requirements GB15760—1995 General technical requirements for safety protection of metal cutting machine tools GB/T16769—1997 Method for measuring sound pressure level of noise from metal cutting machine tools JB/T9872—1999 General technical requirements for machining parts of metal cutting machine tools JB/T9874--1999
General technical requirements for assembly of metal cutting machine tools JB/T 9877—1999wwW.bzxz.Net
Determination of cleanliness of metal cutting machine tools
Precision inspection of CNC vertical lathes
JB/T 9934.1—1999
3 General requirements
When accepting machine tools according to this standard, the remaining acceptance items in GB/T9061JB/T9872, JB/T9874 and other standards that are not specified in this standard must be inspected at the same time.
4 Accessories and tools
4.1 In order to ensure the basic performance of CNC vertical lathes, the following accessories and tools should be supplied randomly: a) Wrench for clamping workpieces;
b) Wrench for clamping tools;
c) Other special purpose wrenches (such as special wrenches for installing machine tools, etc.); d) High-pressure oil gun for disassembling the spindle shaft;
e) Lubricating oil gun;
f) Anchor screws, nuts, washers, and adjusting shims; g) Tools for roughing and finishing holes and external circles and end faces. 4.2 In order to expand the performance of CNC vertical lathes, the following special parts, accessories and tools (supplied by agreement) shall be provided to users for selection: a) boring and milling tool holders;
b) internal force device;
c) tool setting instrument;
Approved by the State Machinery Industry Bureau on May 20, 1999 and implemented on January 1, 2000
d) chip removal device;
e) tool holders and tools other than those supplied with the machine. 5 Safety and Health
JB/T 9934.2—1999
5.1 Guide rails and other parts that are easily worn by dust and chips shall be equipped with safety protection devices. 5.2 The emergency stop switch shall not have an automatic recovery function after completing the emergency stop action. 5.3 When opening the safety protection device may cause harm, the safety protection device shall be interlocked with the machine tool working cycle. 5.4 Ladders, walkways and other corresponding devices should have strong non-slip footboards, and there should be continuously raised guard plates and railings along their edges. 5.5 When the lowest position of the operating platform (walkway) is lower than 2.2m from the ground, its guard plate should be painted with yellow and black lines of the same width at an angle of 45°, and the line width should be 20~50mm. 5.6 If the machine tool is equipped with an elevator for personnel lifting, the relevant regulations on elevator installation and safe use must be observed. 5.7 Machine tools using static pressure devices should ensure that they can only be started after static pressure is established. When the pressure changes exceed the regulations or the power is interrupted, safety should be guaranteed.
5.8 The safety protection of the machine tool should also comply with the relevant provisions of GB15760. 5.9 The electrical equipment of the machine tool should comply with the relevant provisions of GB/T5226.1. 5.10 The noise of the machine tool should be tested in accordance with the provisions of GB/T16769. 6 Processing and assembly quality
6.1 The following important parts must be aged after rough processing: a) workbench;
b) base;
c) crossbeam;
d) column:
e) main gearbox:
f) tool holder body, slide.
6.2 The following important guide rails should take wear-resistant measures: a) workbench and workbench base guide rail; b) vertical tool holder and ram guide rail;
c) slide and crossbeam guide rail;
d) crossbeam and column guide rail.
6.3 The joint surfaces of the following mating parts shall be inspected according to the requirements of "important fixed joint surfaces": a) joint surface between base and column;
b) joint surface between column side and connecting beam;
c) joint surface between base and gearbox;
d) joint surface between crossbeam and feed box;
e) joint surface between crossbeam lifting and reducing box and column (or top beam); f) joint surface between screw support and base;
g) joint surface between gear ring and base.
6.4 The locating pins of the following parts shall be checked by coloring: a) locating pins between column and base;
b) locating pins of screw adjustment bracket;
c) locating pins between gear ring and workbench.
The contact length of the locating pin shall not be less than 60% of the working length of the locating pin, and the contact parts shall be distributed on both sides of the joint. The deviation of the head is allowed to be 166
, but it must exceed the joint.
JB/T 9934.2—1999
6.5 The edges of the exposed joint surfaces of parts and components should be neat and symmetrical, and the misalignment should not exceed the provisions of Table 1 Table 1
Joint surface edge length
>500～1 250
>1250～3 150
3 150～6 300
Note: The joint surfaces in special positions whose appearance is limited by the structure and difficult to correct are only required to be neat and symmetrical. Misalignment
6.6 The cleanliness of the machine tool shall be inspected according to the provisions of JB/T9877, generally by visual inspection and hand feeling method. If necessary, use the weight method to inspect. After 30 minutes of operation, take out the oil sample from the box immediately and measure the weight of the dirt it contains. The hydraulic oil shall not exceed 200mg/1. (spot check), and the lubricating oil shall not exceed 400mg/L (spot check).
7 Machine tool idle operation test
7.1 Machine tool function test
7.1.1 General function test
Use buttons and switches to manually operate and conduct function tests on the machine tool to test its flexibility, stability and reliability. 7.1.1.1 The workbench shall be tested for starting, forward, reverse, braking and stopping under low, medium and high speed conditions, and the continuous operation shall be no less than 10 times.
7.1.1.2 Perform speed change test within the full speed range of the workbench. 7.1.1.3 Select appropriate speed for feed movement to start, stop, forward and reverse feed and fast test. The forward and reverse continuous operation test shall be no less than 10 times, and the fast stroke shall not be less than half of the full stroke. 7.1.1.4 Perform speed change test within the entire feed speed range. 7.1.1.5 Perform full stroke lifting test on the crossbeam, with the lifting times not less than 3 times. 7.1.1.6 Perform sealing, lubrication and cooling performance tests on the hydraulic, lubrication and cooling systems, requiring easy adjustment, flexible movement, good lubrication, sufficient cooling, and no leakage in each system.
7.1.1.7 For machine tools with automatic clamping and tool changing mechanisms, automatic clamping and force changing tests should be performed. 7.1.1.8 Perform reliability tests on various indicator lights, readers, ventilation systems and other functions of digital control devices. 7.1.1.9 Perform reliability tests on the safety, insurance and protective device functions of machine tools. 7.1.2 CNC function test
Use CNC instructions to make each part of the machine tool move, and test its flexibility of movement and the reliability of CNC function. 7.1.2.1 The workbench performs start, forward, reverse, stop and speed change test (the stepless speed change mechanism performs low, medium and high speed change, and the stepped speed change mechanism performs various speed changes).
7.1.2.2 The feed mechanism performs low, medium and high feed and rapid feed and rapid feed change test. 7.1.2.3 Test the reliability and flexibility of manual data input, position display, return to reference point, program number indication and retrieval, program pause, program elimination, linear interpolation, circular interpolation, linear cutting cycle, cone cutting cycle, circular cutting cycle, tool position compensation, clearance compensation and other functions.
7.2 Idle running test
7.2.1 Idle running test of main motion system
Under the non-cutting running state, test the temperature change and no-load power of the working table during operation. The recording format is as shown in Table 2. The machine tool working table is low 167
JB/T9934.2—1999
Start from low, medium and high speed (step speed is all speeds, and the operation time of each level is not less than 2mm), and operate for a sufficient time at the highest speed (not less than 1h). Make the spindle bearings and guide rails reach a stable temperature, check the temperature of the spindle bearings and guide rails, and they shall not exceed the following regulations:
The temperature of the sliding bearings and sliding guide rails shall not exceed 60℃, and the temperature rise shall not exceed 30℃. The temperature of the sliding bearings and rolling guide rails shall not exceed 70℃, and the temperature rise shall not exceed 40℃. Table 2
Spindle speed
Operation time
Specified value
7.2.2 Feed system idling test
Measured value
No-load power
Input power
Select an appropriate worktable speed, and use low, medium, high and fast feed for the tool holder to conduct the feed system idling test. The recording format is as shown in Table 3.
Test Item
Feed Amount
or Feed
7.3 Continuous Idle Operation Test
Command Value
mm/r or mm/min
Measured Value
mm/r or mm/min
Use CNC commands to conduct non-cutting continuous operation tests on the machine tool to check the flexibility, stability and reliability of various actions. The continuous operation time shall not be less than 16 hours, and the stop time between each automatic cycle shall not exceed 1 minute. No failures shall occur during the entire operation process. During the test, the automatic cycle shall include all functions of the machine tool and the following contents: a) The worktable performs continuous conversion of low, medium and high gears, forward and reverse rotation, start and stop tests, and constant speed processing of the worktable surface test; b) The feed system performs low, medium and high gear feed and rapid feed conversion, and its stroke is the full stroke, and the rapid feed stroke is greater than half of the full stroke;
c) Machine tools with automatic clamping and tool changing mechanisms shall be subject to automatic clamping and tool changing tests. 168
Load test of machine tools
This series of machine tools shall be subject to the following load tests: JB/T 9934.2—1999
a) Operation test with maximum weight of workpiece (spot check); b) Maximum torque test of main transmission system;
c) Maximum power test of main transmission system (spot check); d) Maximum cutting main component force test.
8.1 Operation test of machine tool bearing maximum weight of workpiece (spot check) Load the workpiece with the maximum weight that the machine tool can bear as specified in the design on the workbench, and run at the speed specified in the design, and the running time shall not be less than 30 minutes.
8.2 Maximum torque and maximum cutting main force test of main transmission system Use strong turning of the outer circle of the test piece (without coolant) to test, and the record format shall be in accordance with Table 4. For mass-produced machine tools, it is allowed to test at 2/3 of the maximum torque and 2/3 of the maximum cutting main force, but the maximum torque and maximum cutting main force tests shall be carried out regularly.
Workbench
Pre-cutting conditions
8.3 Maximum power test of main transmission system (spot check) Feed rate
Use high-speed cutting of the outer circle of the test piece to test the ability of the machine tool to withstand the design power, and the record format shall be in accordance with Table 5. Table 5
Workbench
Cutting conditions
Minimum set unit feed test
Feed amount
Main component force
No-load input
Perform the minimum set unit feed test in the common area of the X-axis (or Z-axis) to test the reliability and accuracy of each minimum set unit feed action.
See Appendix A (Standard Appendix) for the test method. Return to reference point test
Return to the reference point quickly at any position on the X-axis (or Z-axis), perform at least 5 return to reference point tests, measure the actual stop position, and the error is calculated as the maximum difference between the stop position and the theoretical position of the reference point, with a tolerance of ±0.005mm. 169
Precision inspection of machine tools
JB/T9934.2—1999
11.1Before the acceptance test, the installation level of the machine tool and the mechanisms related to precision and performance should be adjusted. 11.2During the acceptance process, the machine tool shall not be adjusted arbitrarily. If any abnormal situation occurs (including mechanical and electrical), the cause should be found out, and the inspection should be carried out from the beginning after adjustment. If the adjusted items do not affect the precision and performance of the machine tool, the inspection can continue without starting from the beginning.
11.3The precision inspection of machine tools shall be carried out in accordance with JB/T9934.1. The working precision inspection shall be carried out after the geometric precision and position precision inspection of the machine tool are qualified. The maximum allowable value of the surface roughness Ra of the test piece after fine machining shall meet the following requirements: plane, cylindrical surface, 1.6μm, arc surface, 3.2um. 170
JB/T9934.2-—1999
Appendix A
(Appendix to the standard)
Minimum setting unit feed test method
A1The test method is shown in Figure A1. The tool holder slide (or ram) moves quickly to the test position. Give several minimum setting unit instructions in the same direction, with the stop position as the reference. Then give a minimum setting unit instruction in the same direction each time, so that it moves a distance equivalent to more than 20 instructions, with the 20th instruction position as the final position, and measure the stop position of each instruction between the reference position and the final position. Then move several setting unit instructions in the opposite direction without measuring to eliminate the influence of the reverse error, and then start from the final position, give a minimum setting unit instruction each time, and return to the reference position. Measure the stop position of each instruction. The maximum value of the difference between the distance between two adjacent stop positions and the minimum setting unit is taken as the error of the minimum setting unit feed. Minimum setting unit feed error 11—mimx In the formula, the distance between adjacent stop positions; m
minimum setting unit.
minimum setting unit command activation3 Main drive system maximum power test (spot check) Feed rate
Use high-speed cutting of the test piece outer circle to test the machine tool's ability to withstand the design power. The record format is in accordance with Table 5. Table 5
Workbench
Cutting conditions
Minimum set unit feed test
Feed rate
Main component force
No-load input
Perform the minimum set unit feed test in the common area of the X-axis (or Z-axis) to test the reliability and accuracy of each minimum set unit feed action.
See Appendix A (Standard Appendix) for the test method. Return to reference point test
Return to the reference point quickly at any position on the X-axis (or B-axis), perform at least 5 return to reference point tests, and measure its actual stop position. The error is calculated as the maximum difference between the stop position and the theoretical position of the reference point, and the tolerance is ±0.005mm. 169
Precision inspection of machine tools
JB/T9934.2—1999
11.1Before the acceptance test, the installation level of the machine tool and the mechanisms related to precision and performance should be adjusted. 11.2During the acceptance process, the machine tool shall not be adjusted arbitrarily. If any abnormal situation occurs (including mechanical and electrical), the cause should be found out, and the inspection should be carried out from the beginning after adjustment. If the adjusted items do not affect the precision and performance of the machine tool, the inspection can continue without starting from the beginning.
11.3The precision inspection of machine tools shall be carried out in accordance with JB/T9934.1. The working precision inspection shall be carried out after the geometric precision and position precision inspection of the machine tool are qualified. The maximum allowable value of the surface roughness Ra of the test piece after fine machining shall meet the following requirements: plane, cylindrical surface, 1.6μm, arc surface, 3.2um. 170
JB/T9934.2-—1999
Appendix A
(Appendix to the standard)
Minimum setting unit feed test method
A1The test method is shown in Figure A1. The tool holder slide (or ram) moves quickly to the test position. Give several minimum setting unit instructions in the same direction, with the stop position as the reference. Then give a minimum setting unit instruction in the same direction each time, so that it moves a distance equivalent to more than 20 instructions, with the 20th instruction position as the final position, and measure the stop position of each instruction between the reference position and the final position. Then move several setting unit instructions in the opposite direction without measuring to eliminate the influence of the reverse error, and then start from the final position, give a minimum setting unit instruction each time, and return to the reference position. Measure the stop position of each instruction. The maximum value of the difference between the distance between two adjacent stop positions and the minimum setting unit is taken as the error of the minimum setting unit feed. Minimum setting unit feed error 11—mimx In the formula, the distance between adjacent stop positions; m
minimum setting unit.
minimum setting unit command activation3 Main drive system maximum power test (spot check) Feed rate
Use high-speed cutting of the test piece outer circle to test the machine tool's ability to withstand the design power. The record format is in accordance with Table 5. Table 5
Workbench
Cutting conditions
Minimum set unit feed test
Feed rate
Main component force
No-load input
Perform the minimum set unit feed test in the common area of the X-axis (or Z-axis) to test the reliability and accuracy of each minimum set unit feed action.
See Appendix A (Standard Appendix) for the test method. Return to reference point test
Return to the reference point quickly at any position on the X-axis (or B-axis), perform at least 5 return to reference point tests, and measure its actual stop position. The error is calculated as the maximum difference between the stop position and the theoretical position of the reference point, and the tolerance is ±0.005mm. 169
Precision inspection of machine tools
JB/T9934.2—1999
11.1Before the acceptance test, the installation level of the machine tool and the mechanisms related to precision and performance should be adjusted. 11.2During the acceptance process, the machine tool shall not be adjusted arbitrarily. If any abnormal situation occurs (including mechanical and electrical), the cause should be found out, and the inspection should be carried out from the beginning after adjustment. If the adjusted items do not affect the precision and performance of the machine tool, the inspection can continue without starting from the beginning.
11.3The precision inspection of machine tools shall be carried out in accordance with JB/T9934.1. The working precision inspection shall be carried out after the geometric precision and position precision inspection of the machine tool are qualified. The maximum allowable value of the surface roughness Ra of the test piece after fine machining shall meet the following requirements: plane, cylindrical surface, 1.6μm, arc surface, 3.2um. 170
JB/T9934.2-—1999
Appendix A
(Appendix to the standard)
Minimum setting unit feed test method
A1The test method is shown in Figure A1. The tool holder slide (or ram) moves quickly to the test position. Give several minimum setting unit instructions in the same direction, with the stop position as the reference. Then give a minimum setting unit instruction in the same direction each time, so that it moves a distance equivalent to more than 20 instructions, with the 20th instruction position as the final position, and measure the stop position of each instruction between the reference position and the final position. Then move several setting unit instructions in the opposite direction without measuring to eliminate the influence of the reverse error, and then start from the final position, give a minimum setting unit instruction each time, and return to the reference position. Measure the stop position of each instruction. The maximum value of the difference between the distance between two adjacent stop positions and the minimum setting unit is taken as the error of the minimum setting unit feed. Minimum setting unit feed error 11—mimx In the formula, the distance between adjacent stop positions; m
minimum setting unit.
minimum setting unit command activation
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