What are the causes of deformation of CNC machining parts?

In the process of CNC machining, it is very common for the workpiece to deform. If the accuracy is not enough, the secondary processing can be performed, but the deformation of the processed parts must be returned to the furnace for remanufacturing. The deformation of the processed parts is a difficult problem to deal with. The best solution is to prevent the CNC processed parts from deforming from the root cause. Let's take a look at how the causes of CNC machining parts are deformed.

1. The influence of the material and structure of the workpiece on the deformation of the workpiece

The amount of deformation and the shape complexity, length and width are proportional to the wall thickness, and are proportional to the rigidity and stability of the material. Generally, when designing parts, the influence of these factors on the deformation of the workpiece should be reduced. Especially in the structure of some larger parts, the structure needs to be reasonable. During the machining process, it is necessary to control the defects such as the hardness and looseness of the blank to ensure the quality of the blank and reduce the deformation of the workpiece.

What causes the deformation of CNC machining parts

2. Deformation caused by workpiece clamping

When clamping the workpiece, you need to select the correct clamping point and select the appropriate clamping force at this position. Therefore, it is necessary to keep the clamping point and the supporting point consistent, so that the clamping force acts on the support, the clamping point should be as close as possible to the processing surface, and the position where the stress is not easy to cause the deformation of the clamping is selected.

3. Deformation caused by workpiece processing

In the process of cutting, the workpiece will be elastically deformed in the direction of the force due to the cutting force. This is the phenomenon of letting the knife. For similar deformations, corresponding measures can be taken on the tool, and the tool needs to be sharp during finishing, which on the one hand can reduce the resistance caused by the friction between the tool and the workpiece, on the other hand, it can improve the heat dissipation when the tool cuts the workpiece. Ability to reduce residual internal stress on the workpiece.

The above is a summary of the reasons for the deformation of CNC machining parts, which are some of the more critical points. To ensure the quality of CNC machining parts, you need to pay attention to these points to process the CNC machining parts.