1. The material and structure of the NC workpiece will affect the deformation of the workpiece. Deformation is proportional to the complexity of shape, length-width ratio and wall thickness, and to the rigidity and stability of the material. Therefore, when designing parts, we should minimize the influence of these factors on workpiece deformation.

2. When the workpiece is clamped, the correct clamping point should be selected first, and the appropriate clamping force should be selected according to the position of the clamping point. Because the clamping point and the bearing point are as consistent as possible, so that the clamping force acts on the bearing, the clamping point should be as close as possible to the machining surface, and the position where the stress is not easy to cause clamping deformation should be selected. Will the NC workpiece be deformed when it is heavily oiled?