What Are The Reasons For Deformation In Machined Parts?

During lathe processing, the centripetal force is usually used to clamp the parts with the three-jaw or four-jaw chuck of the lathe, and then the mechanical parts are processed. At the same time, in order to ensure that the parts do not loosen when subjected to force and reduce the effect of the inner radial force, the clamping force must be greater than the cutting force of the machine. The clamping force increases with the increase of the cutting force and decreases with it. Only in this way can the mechanical parts be subjected to stable force during processing. However, after the three-jaw or four-jaw chuck is loosened, the processed mechanical parts will be far from the original ones. Some are polygonal, some are elliptical, and there are large deviations.

There are several main reasons for elastic deformation of machined parts. First, if the internal structure of some machined parts contains thin sheets, higher requirements will be placed on the operation method. Otherwise, when the operator positions and clamps the machined parts, it cannot correspond to the design of the drawing, which easily leads to elastic deformation. In addition, the unevenness of the lathe and the fixture makes the force on both sides of the machined parts uneven when they are fixed, resulting in the side with less force during cutting. Under the action of force, the part will be translated and deformed. In addition, the unreasonable positioning of parts during processing reduces the rigidity of parts, which is also one of the reasons for the elastic deformation of parts. The elastic deformation caused by these different reasons all illustrate the influence of external forces on the quality of machined parts.

For thin-sheet mechanical parts, due to their very large long diameter, straw hat bending is easy to occur after heat treatment. On the one hand, there will be a bulging phenomenon in the middle, and the plane deviation will increase. On the other hand, due to the influence of various external factors, the parts will bend. These deformation problems are caused not only by the change of the internal stress of the parts after heat treatment, but also by the lack of professional knowledge of the operators and the lack of understanding of the structural stability of the parts, which increases the probability of deformation of the parts.

There are many factors that lead to the deformation of machined parts with a full range of categories, and different measures should be taken to solve different reasons. In actual operation, we should pay attention to every detail of high-quality and low-priced machined parts, continuously improve the production process, strive to reduce economic losses, ensure the stable operation of mechanical equipment, and achieve the high quality and high efficiency goals of machined parts, so as to promote the machining industry to have a better development prospect and a broader market.