No matter what kind of work, there will be some problems in the process. These problems are not big, but they will affect our work efficiency and product quality. So we not only need to solve the problems in time, but also learn how to prevent the occurrence of faults. Next, we will learn how to prevent the deformation of workpiece in the machining process of Dongguan?
The deformation is directly proportional to the shape complexity, length width ratio and wall thickness, and is directly proportional to the rigidity and stability of the material. Therefore, the influence of these factors on workpiece deformation should be reduced as much as possible when designing parts. Especially in the structure of large parts, the structure should be reasonable. Before processing, the hardness and porosity of the blank should be strictly controlled to ensure the quality of the blank and reduce the deformation of the workpiece.
When the workpiece is clamped, the correct clamping point should be selected first, and then the appropriate clamping force should be selected according to the position of the clamping point. Therefore, the clamping point should be consistent with the support point as much as possible, so that the clamping force acts on the support. The clamping point should be as close to the machining surface as possible, and the position where the force is not easy to cause clamping deformation is selected.
Dongguan machining
When there are several directions of clamping force acting on the workpiece, the order of clamping force should be considered. For contacting the workpiece with the support, the clamping force should act first, and it is not easy to be too large. For the main clamping force balancing the cutting force, the stress acts on the last. Secondly, the contact area between workpiece and fixture should be increased or axial clamping force should be used. Increasing the rigidity of parts is an effective way to solve the problem of clamping deformation. However, due to the shape and structure characteristics of thin-walled parts, it has low rigidity. In this way, under the action of clamping force, deformation will occur.
Increasing the contact area between workpiece and fixture can effectively reduce the deformation of workpiece during clamping. For example, when milling thin-walled parts, a large number of elastic pressing plates are used to increase the stress area of the contact parts; when turning the inner diameter and outer circle of the thin-walled sleeve, whether using simple opening transition ring, or using elastic mandrel, whole arc claw, etc., the contact area of workpiece clamping is increased. This method is beneficial to carrying the clamping force and avoiding the deformation of parts. The use of axial clamping force is also widely used in production. The design and manufacture of special fixture can make the clamping force act on the end face, which can solve the bending deformation of workpiece caused by thin wall and poor rigidity.
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