JB/T 9921.2-1999 This standard is a revision of ZB J55 044-90 "Technical conditions for bearing inner ring groove superfinishing machine and bearing outer ring groove superfinishing machine". 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 9921 "Bearing inner ring groove superfinishing machine and bearing outer ring groove superfinishing machine" series of standards, which includes the following two parts: JB/T 9921.1-1999 Bearing inner ring groove superfinishing machine and bearing outer ring groove superfinishing machine accuracy inspection JB/T 9921.2-1999 Bearing inner ring groove superfinishing machine and bearing outer ring groove superfinishing machine technical conditions This standard specifies the requirements for the manufacture and acceptance of bearing inner ring groove superfinishing machine and bearing outer ring groove superfinishing machine. This standard is applicable to four-station two-step superfinishing machines for processing bearing inner ring maximum aperture 25~100mm and bearing outer ring maximum outer diameter 40~125mm. Other types of superfinishing machines can be used as a reference. This standard was first issued in March 1989. JB/T 9921.2-1999 Technical conditions for bearing inner ring groove superfinishing machines and bearing outer ring groove superfinishing machines JB/T9921.2-1999 standard download decompression password: www.bzxz.net

ICS 25.080.50
Machinery Industry Standard of the People's Republic of China
JB/T 9921.1-9921.2—1999
Bearing inner ring groove superfinishing machine
And bearing outer ring groove superfinishing machine
1999-05-20 Issued
State Machinery Industry Bureau
2000-01-01 Implementation
3B/T 9921.2—1999
This standard is revised on the basis of [35044.--89 Technical Conditions for Bearing Inner Ring Groove Superfinishing Machine and Auxiliary Bearing Outer Ring Lubrication Support Machine] of 2nd January. This standard is the integration and supplement of ZBJ5504489 and other standards. The technical content of this standard is consistent with that of ZBJ5504489, and it has only been re-edited according to relevant regulations. This standard is part of the JBJ5504489 series of standards for bearing inner groove superfinishing and bearing outer ring groove superfinishing. This series of standards includes the following two parts: JB.T9921.1-1999 bearing inner groove superfinishing and bearing outer ring groove superfinishing. JB.T9921.2-1999 bearing inner groove superfinishing and bearing outer ring groove superfinishing. This standard replaces ZBJ55044-B9 from the date of implementation. This standard is proposed by the National Metal Cutting Machine Standardization Technical Committee. This standard is under the jurisdiction of the National Metal Cutting Machine Standardization Technical Committee Tang Chuang Branch. The drafting unit of this standard is Wuxi Machine Tool Factory. This standard was first issued in March 1989.
Standard of the Machinery Industry of the People's Republic of China
Technical Conditions for Bearing Inner Ring Groove Superfinishing Machine and Bearing Outer Ring Groove Superfinishing Machine
【Scope
This standard specifies the requirements for the manufacture and acceptance of bearing inner ring groove superfinishing machine and bearing outer ring groove superfinishing machine. JB/T 9921.2—[999
1554—89
This standard is applicable to the four-station one-step superfinishing machine for processing the maximum bore diameter of the inner ring of the bearing of 25-100mm and the maximum diameter of the outer ring of the bearing of 40-125mm. Other pool-type superfinishing machines can be used as a reference. 7 Referenced Standards
The provisions contained in the following standards constitute the text of this standard through reference in this standard. During the publication of this standard, the versions shown are valid. All standards will be revised. Therefore, the parties using this standard should explore the possibility of using the new versions of the following standards. GBT5226.1—1996
GB9061988
GB15760—1995
GB/T167691997
JR/T9872—1999
JB.T9874—1999
JB/T9B77—1999
JB/T9921.1—1999
JB/T10051—1999
3 General requirements
Industrial machine specifications for electrical equipment Part 1: General technical conditions General technical conditions for metal cutting machine tools| |tt||General technical conditions for safety protection of metal cutting machine toolsMethods for measuring the sound pressure level of metal cutting machine toolsGeneral technical conditions for machining parts of metal cutting machine toolsGeneral technical conditions for assembly of metal cutting machine toolsDetermination of noise level of metal cutting machine tools
Precision inspection of bearing inner ring groove superfinishing machine and bearing outer circle groove turning machineGeneral technical approval of compression system of metal cutting machine toolsWhen accepting the machine tool according to this standard, it is necessary to inspect the remaining acceptance test items in GB/T9061, JB.T9B72, JB/19874 standards that are not specified by this standard at the same time.
4 Accessories and tools
To ensure the basic performance of the machine tool, a set of special tools such as adjustment handwheel and hexagonal wrench should be randomly supplied. Note: To expand the performance of the machine tool, the user's requirements should be reported to the equipment for supply. 5 Safety and sanitation
5. The main machine and accessories should comply with the provisions of GB15760 and other standards. 5.2 The hydraulic system of the machine tool must comply with the relevant provisions of JB/T10051, and the air system of the machine tool should comply with the relevant provisions of GB/T5226.1. 5.3 If a large oil leak occurs during the operation of the superfinishing machine, an effective rubber protection device must be provided. 5.4 The camshaft rotation and hand-cranking mechanism must be equipped with a reliable interlocking device. Approved by the State Machinery Industry Bureau on May 20, 1999, and implemented on January 1, 2000
6. The following important castings should be subjected to aging treatment after assembly: a) bed; b) steel plate (or 1 piece box) c) body
6.1 The combination of the bed and the wall plate (or 1 piece box) shall be assessed according to the requirements of "particularly important fixed joint surface". 6.3 Adjust the requirements for the "uncommonly used" handwheels for wheel connection, but the cam points are not tested. 6.4 The high-frequency swing of the alarm body should be treated with resistance measures. 6.s The components of the pneumatic system have anti-rust features to ensure the reliability of the machine tool during operation. 6.6 The movement of the sliding, indexing and other parts on the machine tool is light, flexible, stable and free of blocking. 6? The transmission electric ring of the bed card should be balanced and calibrated together with the wheel. After calibration, the vibration value caused by the residual imbalance shall not exceed 8ti
6. The JB jin 98?? Check the viscosity of the machine tool. Idle running test of machine tool
7.1 Actionability and temperature rise of machine tool
Start the machine tool and run it continuously for 8 hours under simulated working conditions. It is required that all parts of the machine tool run normally, work in an orderly manner, coordinate reliably, and the fluid system shall not leak.
When the stable temperature is reached, measure the temperature and temperature rise as close as possible to the workpiece spindle and the heat source of the superfine grinding head. The temperature shall not exceed 60℃ and the temperature rise shall not exceed.
The temperature rise test of the filter pressure system shall comply with the provisions of JA/T10051. 7.2 Machine noise ratio
There should be no abnormal screaming sound when the machine tool is running. According to the specification of GB/T16769, the noise level of the machine tool shall not exceed 83dR (417.3 Inspection of the idle running power of the superfine grinding head of the machine tool The idle running power of the superfine grinding head shall not exceed 15% of the specified index. Note
The noise level of the superfine grinding head is also the cost of the operating power index. The 10-case component of the assembly group should be selected. Measure its idle power and take its average current as the index. 2 During measurement and inspection, the total power should be deducted. The power consumed by the engine itself 8 Pre-load test of the machine tool
This machine tool does not undergo load test.
9 Machine tool accuracy inspection
9.1 The machine tool accuracy inspection is carried out in accordance with JD door 9921.1: 9.2 JB.T9921.1=1999 Geometric accuracy G1, G2, (5 and T operating accuracy P1, P2 items, monitor the machine tool to reach the medium speed stable temperature shop for inspection,
JB/T9921.21999
From the end of the inspection of the last geometric accuracy to the beginning Carry out working accuracy inspection. If the interval between them exceeds 50,000, the machine tool will be idle again before the working accuracy inspection can be carried out. 9.3 When inspecting the geometric accuracy of the machine tool in the G6 pre-item in JB/T9921.1-1299, the reverse supplementary inspection shall be carried out. The recalculated positioning accuracy of the indexing disk of the parts shall be inspected. After the 6-item inspection is completed, continue to rotate the indexing disk for three full circles and inspect it in the same way. The errors are calculated respectively and the errors are measured by the maximum difference of the indicator readings. 10 The production efficiency of the machine tool
The production efficiency shall not be greater than Regulations in Table 1 and Table 2. Table 1
Bearing inner groove precision machine
Bearing outer groove precision machine
Add T. Bearing inner diameter
>25-50
Machining bearing outer diameter most direct control
1 Learning part production efficiency review refers to the accurate interval time between parts blanking. 2 In the scope of machine tool processing, take the same specification of bearing sleeves as the test item. Production efficiency
Production efficiency
Timing scale wwW.bzxz.Net
Detection tool
Bucket transfer table
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