JB/T 9902.2-1999 This standard is a revision of ZB J54 021-89 "Technical conditions for connecting rod bearing boring machines". During the revision, only editorial changes were made according to relevant regulations, and the technical content has not changed. This standard supplements and specifies GB/T 9061, JB/T 9872, JB/T 9874 and other standards. This standard is part of the JB/T 9902 "Connecting rod bearing boring machine" series of standards, which includes the following two parts: JB/T 9902.1-1999 Accuracy inspection of connecting rod bearing boring machines JB/T 9902.2-1999 Technical conditions for connecting rod bearing boring machines This standard specifies the requirements for the manufacture and acceptance of connecting rod bearing boring machines. This standard applies to connecting rod bearing boring machines used for automobile and tractor repair. This standard was first issued in March 1989. JB/T 9902.2-1999 Technical conditions for connecting rod bearing boring machines JB/T9902.2-1999 Standard download decompression password: www.bzxz.net

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Machinery Industry Standard of the People's Republic of China
JB/T 9902,1-9902,2—1999
Connecting rod bearing boring machine
1999-05-20 Issued
National Bureau of Machinery Industry
Implementation on 2000-01-01
JB9902.2—1999
Machinery standard is a suspension of ZBJ54021-89 connecting rod bearing waiting for the machine technology conditions have not been met. When ordering, the relevant relevant departments have made editorial modifications, and the technical content has not been changed.
This standard is a supplement and concretization of GB9061, JB.T9872, JB9874 and other standards. This standard is part of the JB9902 connecting rod matching machine series. This series of standards includes the following parts: JB/T9902.1-1999 Precision inspection of connecting rod matching machines JB/T9902.2-1999 Technical conditions for connecting rod matching machines This standard will replace JB99021-89 from the date of implementation. This standard is proposed by the National Metal Cutting Machine Tool Standardization Technical Committee. This standard is drafted by the National Metal Cutting Machine Tool Standardization Technical Committee Drilling and Boring Branch. The responsible drafting units of this standard are Xi'an Special Machine Tool Factory and Shanghai Aviation Equipment Factory. The standard was first issued in March 1989. 1. Applicable to: Machinery Industry Standard of the People's Republic of China
Technical Conditions for Connecting Rod Bearing Boring Machines
This standard specifies the requirements for the manufacture and acceptance of connecting rod bearing boring machines. The standard does not apply to connecting rod bearing chain machines used for charging and towing machines. 2. Reference standard
JB/T9902.2-1999
represents ZB154 021-89
The underlined provisions contained in the standard constitute the provisions of this standard through reference in this standard. When this standard is published, the versions shown are valid. All standards are subject to revision. Parties using this standard should explore the possibility of using the following new versions GRT5226.1-1999 Gas equipment Part 1: General technical conditions GH/T 9061-1988 GB/T5760-1996 GB/T16769-1997 IB/T9872-1999 IB/T 9674—[999
JB:T9877—1999
FB/T9902.1—1999
J8/710051—1999
3 General requirements
General technical requirements for metal cutting machine tools
General technical requirements for full protection of Jinfu cutting machine tools Jinyi cutting machine tools operating noise and sound pressure measurement method General technical requirements for mechanical processing of metal cutting machine tools General technical requirements for the transfer of metal cutting agents Determination of cleanliness of metal cutting machine tools
Determination of the cleanliness of metal cutting machine tools
General Technical Conditions for the Pressing System of Metal Cutting Machine Tools When the machine is assembled according to the standard, the inspection shall be conducted on the other acceptance items in the standards GD/T9061, JB/T9872, 3B/T9874 and JB/T9877 that are integrated in this standard. 4 Accessories and tools
4. To ensure the performance of the machine tool, the following special parts and 1 other parts shall be supplied randomly: a) Boring bar;
b) Keys;
c) Positioning mandrel;
4.2 To expand the performance of the machine tool, special accessories shall be supplied according to the agreement according to the user requirements. 5 Safety and Health
5.! The drag feed motion shall be limited and have a safety device to prevent collision, and must be safe and reliable. 5.2 The electrical system shall comply with the relevant provisions of GB/T5226.1. 5.3 The machine tools with hydraulic feed should also comply with the relevant regulations of JB/T10051. 5.4 The noise reduction of machine tools shall be measured according to the measurement method specified in (B/1769). Under the selected rotation conditions: when the drag plate is fed at medium speed, the noise level shall not exceed 83B(A
JB/T9902.2-1999
5.5 When the mold bed is accepted according to this standard, the remaining inspection items that have not been integrated in the technical standard must be inspected at the same time. Processing and assembly quality
6.1 The front end clamp hole of the machine tool shaft. The butterfly longitudinal reading of the hydraulic system shall be adopted Take wear-resistant measures. 6.2 The following important castings should be turned as T. and then aging treated: bed:
b) slide plate;
c) main frame.
3 The following joints shall be tested according to the requirements of "transfer guide": ) The joint surface between the slide plate and the tail of the T. worktable:
h) The vertical joint surface between the clamp body and the spindle plate 6.4 The following joint surfaces shall be checked according to the requirements of "important fixed joint surfaces"; a) The joint surface between the spindle box and the bed;
b) The joint surface between the clamp body and the working part;
The joint surface between the gear box and the bed;
d) The joint surface between the oil cylinder seat and the bed.
6.5 The operating force of the bottom wheel of the machine shall not exceed 60N. 6.6 The hydraulic and lubrication systems of the machine tool are all leak-proof. 6. Please inspect the machine according to the provisions of Standard B98-7. Among them: the grease lubricated bearings of the seven-axis box are inspected by hand feel test method: the cleanliness of the internal part of the hydraulic system is inspected by gravity test, and the impurities and dirt are less than 8000mg: 7 Machine tool idling test
7.1 The machine tool idling test includes the spindle rotation, worktable feed movement and rapid movement: 7.2 The idling rate of the main transmission of the machine tool with a speed of 1000 rpm (excluding the idling rate of the ten motors) is less than 25% of the rated average rate of the main drive; 7.3 The seven axes of the machine tool are tested from the most Starting from low speed, the operation time of each speed level shall be less than 2min, and the operation time at the highest speed shall not be less than 1h, so that the spindle bearing reaches a stable temperature. The spindle bearing temperature should not exceed 70°C, and the temperature rise should not exceed 0°C. 7.4 The hydraulic system of the machine tool shall be operated for no less than 2h at the rated working pressure, and the hydraulic temperature should not exceed 60°C, and the temperature rise should not exceed 30°C. 7.51 The feed of the worktable should be stable, without obvious creeping, and the reversing should be flexible and reliable without lag. 8 Machine tool load test
The maximum power of the main transmission system of the machine tool shall be tested by the method specified by the manufacturer. 9 Machine tool precision inspection
9.1 The geometry and working precision of the machine tool shall be inspected according to JB 9902.1: G1 and 02 should be inspected when the machine tool reaches the medium speed temperature.
9.2 The surface roughness R of the refined silk is 0.8μ.
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