For the precision machining industry, the tolerance of production drawing parts processing. A precision parts processing drawings will have dimensions, special position machining accuracy requirements, that is, positive and negative tolerance. The marked tolerance is to ensure that the actual geometric parameters are consistent with the dimensions specified on the drawing in the process of precision parts processing, and the degree of inconsistency between them is called processing error. In order to ensure the accuracy tolerance and avoid the machining error, the following three points should be paid attention to
- Benchmark:
According to the shape of different parts, the same datum plane can be selected for processing to ensure that the clamping of parts in the processing process can reduce a certain error range, which is the importance of datum plane.
- Shape:
For different drawings provided by our customers, the workpiece with special shape can’t be clamped normally. At this time, we can consider designing clamping fixture for positioning processing and selecting datum plane. Its main function is to assist the processing to meet the accuracy requirements and improve the production and processing efficiency.
- Technology
In the precision machining industry, some people say that the drawing processing technology is an art, reasonable technology will save a lot of time, but also can improve the efficiency of production and processing. So a reasonable process is very important.
- Machine tool:
Previous articles have also mentioned that the accuracy of the machine tool itself will affect the error, because there are several kinds of errors of the machine tool itself, mainly including the head spindle rotation error, guide rail error and transmission chain error.
The above is about the tolerance of precision parts processing, for parts processing requirements are higher and higher, how to ensure the accuracy of the size.
ken. tang@chengcg.com
