JB/T 9923.2-1999 This standard is a revision of ZB J55 048-89 "Technical conditions for double disc grinding machines". This standard specifies and supplements GB/T 9061-1988 "General technical conditions for metal cutting machine tools". This standard is part of the JB/T 9923 "Double disc grinding machine" series of standards, which includes the following two parts: JB/T 9923.1-1999 Double disc grinding machine accuracy inspection JB/T 9923.2-1999 Double disc grinding machine technical conditions This standard specifies the requirements for the manufacture and acceptance of double disc grinding machines. This standard is applicable to rocker-type and fixed double disc grinding machines with grinding disc diameters of 400~1250mm. This standard was first issued in March 1989. JB/T 9923.2-1999 Technical requirements for double disc grinding machines JB/T9923.2-1999 Standard download decompression password: www.bzxz.net

1C825.080.50
Machinery Industry Standard of the People's Republic of China
JB/T9923.1~9923.2—1999
Double Disc Grinding Machine
1999-05-20 Issued
National Bureau of Machinery Industry
2000-01-01 Implementation
JB/T9923.2-1999
This standard is revised on the basis of 7B155M8—89 Technical Requirements for Double Disc Grinding Machine. This standard is a specific and supplementary to GD/T9061-1988 General Technical Requirements for Metal Cutting Machine Tools and other standards: This standard re-edited the connection technical content with ZBJ5504B-89 and the connection related regulations. This standard is part of the JB/T9923 double disc grinding machine series, which includes the following two parts: JB.9923.1-1999 Double disc grinding machine precision inspection B23.2-Technical conditions for double disc grinding machine
This standard replaces J5548 from the implementation of this standard. This standard is proposed by the National Technical Committee for Standardization of Cutting Machine Tools. This standard is under the jurisdiction of the National Technical Committee for Standardization of Cutting Machine Tools Grinding Machine Branch: The responsible unit for this standard is Xinduo Machine Tool Factory. The standard was first issued in March 1999, and the People's Republic of China Machinery Industry Standard
Technical conditions
Double disc grinding machine
This standard specifies the requirements for the inspection and acceptance of double disc grinding machines. This standard is applicable to kidney-type and fixed double-disc grinding machines with grinding disc diameters of 40 to 1250 mm. Reference standards
JB/T9923.1—1999
The following standards contain provisions that are referenced in this standard and constitute the standard provisions. When the standard is published, all versions are valid. All standards will be revised. All parties using this standard should explore the possibility of using the latest version of the following standards. BT5226,1--1996
GR/T 90M61—1988
B157601995
JB/T 9872—1999
B/T9874—1999
JB/T9877--1999
B/T9923.1—1999
B1005—
Industrial machinery and equipment Part 1: General technical conditions General technical conditions for metal enclosed machine tools
Technical conditions for full protection of metal bottom cutting machine tools Technical conditions for machining parts of metal screen cutting machine tools General technology for machine tool assembly Determination of cleanliness of metal cutting machine tools
Precision inspection of double-disc grinding machine
Technical conditions for hydraulic system of metal cutting machine tools When accepting machine tools according to this standard, the remaining acceptance items that have not been integrated in GB/T9061, JB/5872, JB/T9874 and other standards must be inspected and adjusted at the same time.
Accessories and tools
The accessories and tools listed in Table 1 should be provided at random!
Accessory name
Grinding disc
Looking mechanism
Refraction device
Complete machine! Special tools for grinding work
Anchor screw
Grinding work
Make the workpiece produce a guiding motion
Feeding tray Grinding sensor
Adjustment
Installation
Note: The special parts of the machine performance are enlarged, according to the requirements of the user, according to the national machinery industry weekly 1999-05-2 approved
2000-01-01 actual distance
5 Safety and health
JB.T9933.2—1999
5.1 The grinding machine should have a protective device to prevent the splash of abrasive media. 5.2 The working position should be reliably positioned and locked. After leaving the working position, it is not locked. The return path of the lock is removed, and the unit is basically motionless before the shake. 5.3 The electrical and pressure systems shall comply with the relevant requirements of GB/T5226.1 and JB/T10051 respectively. 5.4 The safety and quality of the machine tool shall also comply with the provisions of H15760. 6 Machining and matching quality
1 The bed, column, through-plate, moving plate and other important castings shall be aged after rough machining. 6.? The combination shall be assessed according to the requirements of "fixed combination": a) The joint surface between the bed and the column pin;
b) The joint surface between the bed and the main and auxiliary bodies;
) The joint surface between the grinding disc or the missing wheel disc and the receiving disc, 6.3 The contact requirements of the tooth surface of the worm gear pair : 65% on the tooth width: 60% on the tooth width 6.4 The operating force of the dresser lifting hand wheel is assessed according to the "frequently used wheel", and the operating force of the handle is "unfrequently used" and the core, 6.5 The cleanliness of the machine is tested according to the relevant standards such as 987T. During the inspection, the weight of the internal viscera of the lower shaft box is not more than 200m%-7 Machine tool idle operation test
. 1 The temperature rise test of the machine tool
, the lower grinding wheel and the side plate are operated at the same time for not less than 4, and the highest net operation time is not less than 1h. When the upper ten axes reach a stable temperature, check the temperature of the spindle bearing and its temperature rise value. 1. Idle power test
: The idle power should not exceed ±15% of the specified index.
! The idle power index of the upper and lower grinding disk is determined. Select 10 disks with good assembly quality to check their idle power and take the average value as the index.
2 During the measurement and control test, the motor power should be kept within the range of the motor itself. 7.3 Action test
The swing of the arm and the sliding of the trimmer pillow should be flexible and stable, without resistance band phenomenon, and the Japanese machine tool fish load test bzxZ.net
The technical series of the machine tool does not do " The "Liu Year" test is only carried out for the main motor to the rated (design decision) power rate test. The test method is carried out according to the regulations of each manufacturer.
9 Machine tool accuracy inspection
9.1 The machine tool accuracy inspection is carried out according to JB/F23.1. 9.2 The continuous movement of the grinding wheel dresser is not less than 0.02mm over a length of 250mm. 9.3 The several directions of G2 and G4 in JBT9423.1-199 are pre-heating inspection items. They should be inspected when the machine tool reaches the rated speed: 9, 4 Working accuracy test is carried out according to the relevant regulations of the manufacturer. U
JB/T 9923.2-1999
9.5 This machine can also grind two round pieces. The length of the test piece is 30-40mm. The roughness is not more than 0.001mm. The consistency of the longitudinal section diameter is not more than 0.02mm. The maximum allowable value of the roughness R is 0.063m. If the user needs, he can make one piece by himself and conduct a grinding test in the manufacturer.
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