For precision parts, the processing is very strict, the processing process has a tool in, tool out, etc.. For the size of specific requirements, precision requirements, such as 1mm plus or minus how many microns, etc., if the size of the wrong too much will become scrap, then the equivalent of having to re-process, time-consuming and laborious, and sometimes even make the entire processing material scrap, which causes an increase in costs, at the same time, the parts are certainly not available.
For precision parts processing is mainly dimensional requirements, such as how much the cylindrical diameter, there are strict requirements, positive and negative errors within the specified requirements to be qualified parts, otherwise they are unqualified parts; length, width and height also have specific strict requirements, positive and negative errors are also specified, such as an embedded cylinder (take the most simple basic parts for example), if the diameter is too large, more than the error tolerance range, it will Caused by, insert not into the situation, if the actual diameter is too small, more than the lower limit of the negative value of the error allowed, it will cause inserted too loose, not solid problems occur. These are unqualified products, or the cylindrical length is too long or too short, beyond the error tolerance range, are unqualified products, are to be scrapped, or re-processed, which will inevitably cause an increase in costs.
Precision parts processing requirements is in fact the main size problem, must be strictly in accordance with another plus drawings for processing, processing out of the actual size will certainly not be the same as the theoretical size of the drawings, only, as long as the processing size within the error tolerance is qualified parts, so the requirements of precision parts processing is in strict accordance with the theoretical size for processing.
Second is the advanced precision parts processing equipment and testing equipment, advanced processing equipment makes processing precision parts easier, higher precision, better results. Testing equipment can detect the parts that do not meet the requirements, so that all the products sent to customers really meet the requirements.