In machining process, the deformation of machining parts often happened ,and it’s difficult to solve. In order to take corresponding measures, let’s study the reasons.
1.The material and structure of machining parts
The degree of deformation is proportional to the complexity of shape , length ,width and wall thickness. And it’s also proportional to the rigidity and stability of the material. Therefore, when designing the parts, we should reduce the influence of these factors on the deformation. Then ,for some parts with large structure ,we should design a reasonable structure to reduce the deformation.
2. The clamping
First, we need to choose the right clamping point. Then, we should select proper clamping force at this position, and keep clamping point and the supporting point in line .So the clamping force will act on the supporting point. Importantly ,the clamping point should be close to the machined surface as far as possible, and select the position where the force is not easy to cause the deformation.
And we need to pay attention to the order of clamping force when there are several clamping forces on machining parts. First ,we should act the clamping force of machining parts and the supporting point, then act the clamping force of the cutting force.
Then, we should increase the contact area between the machining part and the fixture and use axial clamping force to enhance the rigidity of the machining part.
3.The processing
In the process of cutting, the machining part will produce elastic deformation due to the effect of cutting force. For similar deformation ,we can adopt harp cutting tool .On the one hand ,it can reduce the resistance between the tool and the machining part , on the other hand, it can improve the heat dissipation ability of the tool when cutting machining parts, thereby reducing the residual internal stress of the machining parts.
The heat generated by friction between cutting tool and machining part will also deform the machining part . Generally, we can adopt high speed machining to reduce deformation effectively.
In order to ensure the accuracy of machining parts, we should use a reasonable amount of cutting. And When machining thin-walled parts with high precision, generally, we will adopt symmetrical machining . Because it will balance the relative stress on both sides ,achieve a stable state and make the machining parts that after machining smooth.
