JB/T 9919-1999 This standard is a revision of ZB J55 030-88 "Precision of high-precision centerless grinding machines". The standards that match this standard are: GB/T 6470-1986 Centerless external cylindrical grinding machine parameters JB/T 9905.1-1999 Centerless external cylindrical grinding machine series JB/T 9905.2-1999 Centerless external cylindrical grinding machine technical conditions This standard specifies the requirements and inspection methods for geometric accuracy inspection and working accuracy inspection of high-precision centerless external cylindrical grinding machines. This standard is applicable to high-precision centerless external cylindrical grinding machines with a maximum grinding diameter of 200mm. This standard was first issued in November 1988. JB/T 9919-1999 Precision inspection of high-precision centerless external cylindrical grinding machines JB/T9919-1999 standard download decompression password: www.bzxz.net

ICS 25.080.50
Machinery Industry Standard of the People's Republic of China
JB/T9919-1999
High Precision Centerless External Cylindrical Lathe
1999-05-20 Release
National Bureau of Machinery Industry
Precision Inspection
2000-01-01 Implementation
JB/T9919-1999
This standard is formulated on the basis of ZBJ55030-88 (Specifications of High Precision Centerless Lathe). The technical content of this standard is consistent with that of ZBJ55D30-BB, and it has only been re-edited according to relevant regulations. The standards matching this standard are:
GB/T6470—1986
J8/9905.11999
Centerless external cylindrical grinding machine series
Centerless external cylindrical grinding machine series
JB9905.2-1999 Centerless external cylindrical grinding machine series This standard is implemented from the date of the implementation of the standard. This standard is proposed by the National Technical Committee for Metal Cutting Machine Tools Standardization. This standard is under the jurisdiction of the National Technical Committee for Metal Cutting Machine Tools Standardization. The drafting unit of this standard is Wuxi Machine Tool Factory. This standard was first issued in November 1988.
Standard of the Machinery Industry of the People's Republic of China
Precision Inspection of High-precision Centerless External Cylindrical Grinding Machines
JB/T9919—1999
ZBJ55D3D—8B
This standard specifies the requirements and inspection methods for geometric accuracy inspection and working accuracy inspection of high-precision centerless external grinding machines. The standard is applicable to commercial precision centerless external grinding machines with large grinding diameters up to 200mm. 2 Referenced Standards
The provisions contained in the following standards constitute the provisions of technical standards through reference in this standard. When this standard is published, the version shown is valid. All standards will be revised. All parties using technical standards should discuss the possibility of using the latest version of the following standards. F174211-1998 General Rules for Machine Tool Inspection No. 1! Part: Geometric accuracy of machine tools under no-load or finishing conditions 3 General requirements
3.【When using this standard, refer to the relevant provisions of GB/T7421.1. Especially the installation before inspection, the idling temperature rise of the main and other parts, the inspection method and the inspection accuracy of the tool 3.2 Refer to the provisions of 3.1 in GB/T17421.1-1998. 3.3 Before inspection, the installation and disassembly of the tool and the inspection should be convenient. The actual inspection order of the inspection items should be arranged. 3.4 When the measured length is different from the length specified in this standard, the length of the measuring plate should be converted according to the provisions of 2.3.1.1 in GB/T17421.11998. When the conversion result is less than 0.001mm, it should be calculated as 0.001mm. 3.5 Working accuracy inspection system, the inspection of the test piece should be carried out after precision stepping. 3.6 Type II (suspended type) machine tools refer to machines where the grinding wheel spindle is supported on one side of the base wheel. 3.7 Type II (double-supported type) machine tools refer to machines where the grinding wheel spindle is supported on both sides of the grinding wheel. 3.8 The inspection points can be increased or decreased according to the agreement between the user and the manufacturer. Approved by Guohao Machinery Industry Bureau on 19-05-20
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