Non-standard machining heat treatment and precision technology non-standard machining knowledge, the front has a lot, but for us, this knowledge is not enough to summarize, there will be omissions, so the need for knowledge supplement and update, so that we timely grasp more updated knowledge, so that the understanding of this aspect of machining to be detailed.

Content 1: Heat treatment of parts machining

Heat treatment in parts machining can generally be divided into two kinds: preparation heat treatment and heat treatment.

Preparation heat treatment: The purpose is to improve mechanical properties, internal stress, in order to prepare for heat treatment, generally including annealing, normalizing, tempering and aging treatment and other processes. Preliminary heat treatment, usually after roughing.

Heat treatment: The purpose is to improve the hardness and wear resistance of parts, including quenching, carburizing, nitriding and other processes, generally after semi-finishing and before finishing.

Content two: precision of machining

The accuracy of machining is mainly reflected in the following aspects, such as dimensional accuracy, geometric shape accuracy and mutual position accuracy, of which geometric shape accuracy includes roundness, straightness and flatness, and mutual position accuracy includes parallelism, perpendicularity and coaxial degree.

Content three: What are the methods to obtain non-standard machining accuracy?

Dimensional accuracy: there are mainly test cutting method, adjustment method, sizing method and automatic control method.

Geometric shape accuracy: there are mainly trajectory method, forming method and expansion method and other methods.

Mutual position accuracy: there are mainly direct installation method, finding the right installation method and fixture installation method.