GB/T 40804-2021 Active National standards

GB/T 40804-2021 Short-term capability evaluation of machining processes on metal-cutting machine tools

Publish Date: 2021-10-11 Implement Date: 2022-05-01 For services related to genuine standard inquiry, procurement, translation, and other related services in China, please Contact Us

Basic Information

Standard Code: GB/T 40804-2021

Standard Type: National standards

Standard Status: Active

is_force_gb: no

CCS Name: \nMetal cutting machine tools

ICS Name: Machine Tool Integration

Publish Date: 2021-10-11

Implement Date: 2022-05-01

Pages: 43 pages

Scope

This standard specifies the method of determining the short-term capability of metal cutting machine tools during acceptance by processing specified test pieces, and provides recommendations on test conditions, measurement systems used, and related requirements for machine tools.
This standard is consistent with ISO 22514 (all parts), which describes process management statistical methods, and involves the specific application of these methods in the batch processing of machine tools and test pieces. This standard does not include functional tests typically performed before testing accuracy, nor does it include tests on the safety conditions of machine tools.
Appendix A provides supplementary information related to statistical evaluation, and the protocol and analysis tables for short-term capability testing are shown in Appendices B and C, while Appendix D provides examples for illustration.
Note 1: The purpose of direct testing is to study the performance of a single machine tool, such as geometric or positioning accuracy. Short-term capability evaluation is designed to demonstrate a machine tool's ability to complete a specific processing task. Therefore, short-term capability testing only focuses on the products that have been processed. This means that direct testing methods are more suitable for identifying the error sources of machine tools and making structural improvements to widely used machine tools in production; short-term capability testing is less suitable for detecting error sources of machine tools. Therefore, it is more appropriate to accept metal cutting machine tools through short-term capability evaluation of the processing process for dedicated machine tools that mainly process specific workpieces, such as workstations on production lines, where each workpiece takes less than 10 minutes to process, so at least 50 test pieces should be processed per shift. Otherwise, the statistical uncertainty will increase significantly. Shor