General requirements 4.1 This standard is specific and supplementary to GB/T 9061-2006, GB/T 25373-2010, GB/T 25376-2010, JB/T 8801-2017. When accepting machine tools in accordance with this standard, the The remaining relevant acceptance items in the above standards that are not specified in this document will be inspected. 4.2 The order of inspection items in this standard does not represent the actual inspection order, and inspection can be carried out according to the machine tool assembly process. 4.3 All linear dimensions, deviations and corresponding tolerances in this standard are in millimeters (mm); angular dimensions are in degrees (°). Angular deviations and corresponding tolerances are expressed in ratios. If necessary, microradians (μrad) or Expressed in arcseconds (″). The equivalent relationship of the expression is as shown in equation (1): 0.010/1000=10×10-6 =10μrad≈2″………………………………(1) 4.4 The geometric accuracy of this standard can use other inspection tools with the same indicating quantity and at least the same accuracy. The indicator should have a resolution of 0.001mm. 4.5 When the actual measured length is different from the length specified in this standard, the tolerance should be based on GB/T. According to the provisions of 2.3.1.1 in 17421.1-1998, the conversion is based on the length that can be measured. If the conversion result is less than 0.005mm, it is still calculated as 0.005mm...
T/ZZAS 028-2023 history
2023T/ZZAS 028-2023 Opposed boring and milling machining center