The design of fixtures and jigs is generally carried out according to the specific requirements of a certain project after the mechanical processing flow of the parts is formulated. When formulating the manufacturing process, it is necessary to fully consider the feasibility of implementing fixtures, but when designing and assembling fixtures, modification suggestions can also be proposed for the manufacturing process as needed. The design quality of fixtures and jigs should be used as a measurement indicator to ensure stable machining quality, high production efficiency, low cost, convenient chip removal, safe operation, labor-saving, and easy manufacturing and maintenance of workpieces.

1. Meet the stability and reliability of working positioning during use;

2. There is sufficient load or holding force to ensure the machining process is performed on the fixture.

3. The clamping process is simple and fast to operate;

4. Fragile parts must be quickly replaced with new structures.

5. The reliability of repeated positioning when adjusting or replacing fixtures;

6. Try to avoid complexity and high cost as much as possible.

7. Select standard components as components.

8. Systematization and standardization of internal products.