Machining performance is not only related to the interests of the enterprise, but also related to safety, in order to bring economic benefits to the enterprise at the same time, can also effectively reduce the probability of safety accidents. Therefore, it is particularly important to avoid deformation of parts in the process of parts processing. Operators need to consider a variety of factors are, and in the processing process to take appropriate measures to prevent the occurrence of deformation, in order to make the finished parts can be used normally. In order to achieve this goal, it is necessary to analyse the reasons for the phenomenon of deformation in the processing of parts, deformation of parts to find reliable measures, in order to lay a solid foundation for the realization of the strategic objectives of modern enterprises.

The reasons for deformation in mechanical parts processing

1. The role of internal forces lead to changes in the accuracy of parts processing

When processing on the lathe, the role of centripetal force is usually used, and the three-jaw or four-jaw chuck of the lathe is used to clamp the parts tightly, and then the mechanical parts are processed. At the same time, in order to ensure that the parts do not loosen when the force is applied, and to reduce the role of internal radial force, it is necessary to make the clamping force greater than the cutting force of the machine. The clamping force increases as the cutting force increases and decreases as it decreases. Such operation can make the mechanical parts in the process of machining force stability. However, after the three-jaw or four-jaw chuck is loosened, the machined mechanical parts will be far from the original, some present polygonal, some present oval, a large deviation.

2. Heat treatment processing is prone to deformation problems

For the sheet type of mechanical parts, due to its long diameter is very large, in its heat treatment is prone to straw hat bending condition. On the one hand, there will be the phenomenon of bulging out in the middle, the plane deviation increases, on the other hand, due to the influence of various external factors, so that the parts produce bending phenomenon. These deformation problems arise not only due to changes in the internal stress of the heat-treated parts, but also the operator's professional knowledge is not solid, do not quite understand the structural stability of the parts, thus increasing the probability of deformation of the parts.

3. Elastic deformation caused by external forces

There are several main reasons for elastic deformation of parts in machining. First, if the internal structure of some parts contain thin film, it will have higher requirements for the operation method, otherwise, when the operator in the positioning and clamping of the parts, can not be and the design of the drawings of the design of the correspondence between, easy to lead to the generation of elastic deformation. Secondly, the unevenness of the lathe and fixture, so that the parts in the fixing of the two sides of the force is not uniform, resulting in the cutting of the small side of the force in the force will appear under the action of the translation of parts deformation. Third, the positioning of the parts in the machining process is unreasonable, so that the rigidity and strength of the parts is reduced. Fourth, the presence of cutting forces is also a cause of elastic deformation of parts. These different causes of elastic deformation are indicative of the effect of external forces on the machining quality of mechanical parts.
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