VDI standard is one of many standards. Taking precision as an example, precision refers to the ability of the machine tool to locate the tool tip to the program target point. But there are many ways to measure this positioning ability, and more importantly, different countries have different regulations.
1, Japanese machine tool manufacturers usually adopt JISB620 1 or JISB6336 or JISB6338 standard when calibrating "accuracy". JISB620 1 is generally used for ordinary machine tools and ordinary CNC machine tools, JISB6336 is generally used for machining centers, and JISB6338 is generally used for vertical machining centers.
2. European machine tool manufacturers, especially German manufacturers, generally adopt VDI/DGQ344 1 standard.
3. American machine tool manufacturers usually adopt the NMTBA standard (this standard originated from a study by the American Machine Tool Manufacturers Association, promulgated in 1968, and later revised).
Extended data:
VDI is a non-profit independent organization composed of engineers and scientists, independent of economic circles and political parties. VDI was established in 1856, mainly engaged in technology development, supervision, standardization, work research, rights protection and patents. The central task of VDI is to promote the combination of various technologies and improve human living conditions through the development and effective application of technical means.
VDI also provides engineer training, continuing education and consulting services for the government, parliament and society. The association has increased its technology transfer work.
Baidu Encyclopedia-German Engineers Association