Accuracy and error are the main indicators for evaluating the machining characteristics of mechanical parts. In the production of holes, shafts, etc., the tolerance level should be strictly implemented. Tolerance grade is also the main manifestation of accuracy; the higher the accuracy, the smaller the standard value of dimensional tolerance. Machining errors can only be continuously reduced, not completely eliminated, and the accuracy is obtained by comparing the main parameters of the mechanical geometry of production and processing with the design drawings. Accuracy includes the surface specification of the machine, which needs to be compared with the design scheme standard. It fluctuates within the allowable range of the standard, and the precision reaches the specified level; the precision, such as coaxiality, parallelism, etc., the strict control of the shape precision can reasonably ensure the quality of the mechanical shape; the precision of the parts, which is also compared with the standard plan, Flatness, flatness, etc. are all part accuracy.
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