1. The deformation of thin-walled parts generally refers to the radial elastic deformation of the workpiece caused by external force during clamping. After the machining is completed and loosened, the workpiece returns to its original state, resulting in changes in the radial size.

2. This kind of deformation cannot be fundamentally solved by mechanical correction after machining.

3. Heat treatment solves thermal stress or mechanical stress, but it can't fundamentally solve this problem.

4. The key is to keep the original state of the blank from the beginning of rough machining, cut off the redundant parts and keep the workpiece in the original state from beginning to end. Only in this way can the elastic deformation of the workpiece be fundamentally solved. Never use mechanical external force to forcibly straighten and rework.

5. So every time you squeeze, you must apply force axially, not radially.

6. The specific operation process depends on many factors such as workpiece precision requirements, assembly requirements, inspection methods, blank state of materials, heat treatment requirements and so on.