This standard specifies the requirements and inspection methods for the geometric accuracy and working accuracy of CNC instrument lathes. This standard is applicable to ordinary precision CNC instrument horizontal lathes and their variants with a maximum rotation diameter of 250mm and a maximum workpiece length of 500mm on the bed. JB/T 8326.1-1996 CNC instrument horizontal lathe accuracy JB/T8326.1-1996 Standard download decompression password: www.bzxz.net

Mechanical Industry Standard of the People's Republic of China
CNC Instrument Horizontal Lathe
1 Subject Content and Scope of Application
JB/T8326.1—96
This standard specifies the requirements and inspection methods for the geometric accuracy and working accuracy of CNC instrument horizontal lathes. This standard is applicable to ordinary precision CNC instrument horizontal lathes and their variants with a maximum rotary diameter of 250mm on the bed and a maximum workpiece length of 500mm.
Referenced standards
GB10931 Method for evaluating the position accuracy of digital control machine tools JB2670 General rules for precision inspection of metal cutting machine tools 3 General requirements
3.1 Refer to 3.1 in JB2670 to adjust the installation level, place the slide in the middle of the guide rail travel, place a level on the guide rails at both ends of the machine tool or on the special bridge plate, and the readings of the level in the longitudinal and transverse directions shall not exceed 0.04/1000. 3.2 During the inspection, the actual inspection sequence can generally be arranged according to the requirements of the installation and disassembly inspection tools, inspection convenience, and thermal inspection items. 3.3 During the working accuracy inspection, the inspection of the test piece should be carried out after fine turning. 3.4 When the actual measured length is different from the length specified in this standard, the tolerance should be converted according to the length that can be measured according to the provisions of 2.3.1.1 in JB2670. When the conversion result is less than 0.005mm, it is still calculated as 0.005mm. 3.5 The plane passing through the tool tip and the spindle axis is called the main plane, and the plane passing through the spindle axis and perpendicular to the main plane is called the secondary plane. Approved by the Ministry of Machinery Industry of the People's Republic of China on April 11, 1996 and implemented on October 1, 1996
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