JB/T 9922.3-1999 This standard is a revision of ZB J55 046-89 "Technical conditions for center hole grinders". This standard is a concretization and supplement to GB/T 9061-1988 "General technical conditions for metal cutting machine tools". This standard is part of the JB/T 9922 "Center hole grinder" series of standards, which includes the following three parts: JB/T 9922.1-1999 Center hole grinder parameters JB/T 9922.2-1999 Center hole grinder accuracy inspection JB/T 9922.3-1999 Center hole grinder technical conditions This standard specifies the requirements for the manufacture and acceptance of center hole grinders. This standard is applicable to center hole grinders with a maximum workpiece diameter of 80~220mm and a maximum workpiece length of 500~2500mm. This standard was first issued in March 1989. JB/T 9922.3-1999 Technical Specifications for Center Hole Grinding Machines JB/T9922.3-1999 Standard download decompression password: www.bzxz.net

ICS 75,U80.50
Machinery Industry Standard of the People's Republic of China
JB/T9922.1-9922.3—1999
Center Hole Grinding Machine
1999-05-20 Issued
State Bureau of Machinery Industry
2000-01-01 Implementation
JET99223-1999
This standard is formulated on the basis of ZB15546--B9 Technical Policy Part 3 for Center Hole Grinding Machines: This standard is a consolidation and supplement to GB: T9061-198 Technical Conditions for Metal Cutting Machine Tools and other standards. This standard is consistent with the technical content of 1554-9, and has been re-edited according to relevant regulations. This standard is part of the 1R/9922 center hole grinder series of standards, which includes the following three parts: JB9922.1-[999 center hole grinder reference] JB, T9922.2-[999 center hole grinder characteristic inspection] JB, T9922.3-J999: center hole grinder technical conditions This standard replaces ZBJ55046-89 from the implementation. This standard is proposed by the National Metal Bureau Cutting Machine Tool Standardization Technical Committee. This standard is also under the jurisdiction of the National Cutting Machine Tool Standardization Technical Committee. The drafting unit of this standard is: Xinxiang Machine Tool Factory. 4 The standard was first issued in March 1589:
1 Scope
Machinery Industry Standard of the People's Republic of China
Center Hole Grinder
Technical Conditions
This standard defines the requirements for the selection and acceptance of center hole grinders JB/T9922.3-1999
2 [55046
The standard is applicable to center hole grinders with a maximum diameter of 80.200mm and a maximum length of 500-25mm. 2 Reference Standards
The clauses of a list of standards are included in this standard and constitute the clauses of this standard through reference in this standard. When this standard is published, not all versions shown are valid. All standards will not be revised. Parties using this standard should explore the possibility of using the new versions of the following standards: GBT5226.1—1996
GB/19061988
GB 15760—1595
GB/T167691997
JB.T 9872-1999
JB.T 9874-1999
JB/T9877—1999
JH/ 9922.2—1999
3—General requirements
Applicable to electrical equipment of industrial machines Part 1: Near-term technical requirements Technical conditions for cutting machine tools
General technical conditions for safety protection of cutting machine tools Method for measuring sound level of metal cutting machine tools
General technical conditions for machined parts of metal cutting machine tools
General technical conditions for assembly
Determination of cleanliness of metal cutting machine tools
Precision inspection of center hole grindersbzxz.net
When accepting machines based on this standard, it is necessary to lock in and inspect the remaining acceptance items in standards such as BT061, JT9872, JDT9874, etc. that have not been standardized by this standard.
Accessories and tools
Accessories and tools listed in the "Supply list of chain machines" are shown in the table
Accessories
Moveable guard
Dust collector
Grinding wheel protection
Grinding wheel width
Secure fixing device
V-shaped base
Spherical claws
Supporting top
Special disassembly
Supporting parts
Non-shaped workpieces
Installing grinding wheel
Safe lifting bed
Holding workpiece
Supporting workpiece
Supporting workpiece
Special structure of workpiece
Method for improving the performance of the workpiece: Special accessories shall be supplied according to the agreement of the user. Caojia Machinery Industry approved on 1999-05-20 the available diameter of the wheel is: 30mm: 50mm1: 60ml2000-01-01 implementation 5 Safety and Health JB/T 9422.3—1999 5.1 The electrical system shall comply with the provisions of GB/T5226.I. 5.1 The safety protection of the machine tool (such as dust breaking device, grinding wheel protection, etc.) shall comply with the relevant provisions of GB/T15760 and other standards. 5.3 The noise of the machine tool shall be inspected in accordance with the provisions of GB/T16769. When the machine tool noise is measured under the conditions of idling at low, medium and high speeds, the noise level of the machine tool shall not exceed 3B (A6 Processing and assembly quality
6.1 The following castings shall be aged after the corresponding processing: a) Bed and extension bed
b) Grinding head body:
) 30 Fixed guide rail:
d) 30e Sliding guide rail:
e) Clamping device guide:
f) Display stand.
6.2 The tightening device guide pair, grinding head lifting guide pair, 30° incremental guide pair should adopt the 63 bed guide system, and the clamping device guide pair should be tested according to the requirements of “shift guide”. The head lifting guide pair and the 30" sliding guide brush shall be tested according to the requirements of the sliding guide.
6.4 The following joint surfaces shall be tested according to the requirements of "special fixed joint surfaces": a) The joint surface between the grinding head housing and the grinding head bracket; b) The joint surface between the clamp and its accessories;
) The joint surface between the Y-shaped clamp and its accessories; d) The joint surface between the 30° fixed heat conduction and its accessories: 6.5 The operating force of the tailstock lifting handwheel, the condensing device handwheel, the feeding handwheel of the grinding head lifting mechanism and the grinding wheel dressing handwheel shall be tested according to the requirements of "frequently used handwheels": The roughness of the head lifting mechanism shall be tested according to the requirements of "uncommonly used handwheels". 6.6 The reverse idle travel of the head lifting handwheel, the wheel dresser handwheel and the tightening device handwheel shall not exceed 120°. The reverse actual travel of the other handwheels shall not exceed 1416.? Grinding shaft motor The pulley should be dynamically weighed and aligned. After calibration, the effective amplitude of the perturbation caused by the residual unbalance should not exceed 1m6.8 Check the cleanliness of the machine tool according to relevant standards such as IB 77. During the control, the internal cleanliness of the grinding head body should be inspected by weight. The impurities and dirt should not exceed 200mg:
6.9 The life of the grinding shaft should not be less than 2000h:
The machine tool idle operation test
The machine tool temperature rise test
The machine tool starts from low speed and runs in sequence. The idle operation time is not less than 2h. After reaching the stable temperature, measure the temperature and temperature rise of the grinding head spindle bearing. The temperature does not exceed 60℃, and the temperature rise does not exceed 30℃. 7.2 Oil lubrication test during machine tool operation
Before the spindle is operated, the oil lubricator should produce zero oil, and it should not be interrupted during cutting. .3 Grinding head idle operation power test
JB/T 9921.3—[999
The idle running power of the grinding wheel should not exceed ±15% of the specified index. 1 Measure the assembled: Check the rate of separation of the grinding wheel from the center, and use its average as the indicator for measuring the idle running power. 2 When the test is completed: deduct the average power consumption of the electric machine, 7.4 Inspection of grinding wheel feed standard
7.4.1 Feed rate: 100% for each feed; 20% for 10 times the cumulative feed rate. 7.4.2 Inspection method
Fix the probe to the upper end of the bed so that its probe touches the near-sensing wheel vertically, feed with the minimum feed amount, and continuously. 10 times [should be carried out after the gap of the feed system is eliminated). The error is calculated according to formula (1) and formula (2): Feed error again
×100%
Improvement to cumulative error
In the text:. ---Actual feed amount, mm:
b-Minimum feed display, mm.
Japanese machine tool load test
series machine tools do not do overload test, only the rated power (or design power) test of the head motor, and the test specifications are as follows: =1T parts are prepared according to the maximum specification test piece of P1 in JB-T9922.2-1999; b head speed is business connection:
. ! Feed the plate evenly and vertically until the motor reaches the rated power (or the designed rated power). 9. Machine tool inspection
0.1 The bottom inspection should be carried out according to JB 992.2 9. 2IB, T 9922.2-1999 G4 is a heat inspection item. 9. The cutting specifications during the operation of the machine tool should be in accordance with the manufacturer's regulations. 9.4 The maximum allowable particle size R of the center hole of the test piece after the surface removal is 0.63.m. J3
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