2. Then open the stamping die and check whether the die is worn or deformed.

3. Then measure the actual size of stamping parts with a measuring tool and compare it with the design drawings to determine the specific value of the upper and lower deviation.

4. Then, according to the difference between the actual size and the design drawing, adjust the up-and-down deviation of the stamping die.

5. Then carry out stamping test with a punching machine to check whether the stamped parts meet the requirements.

6. Then the stamping parts do not meet the requirements, and it is necessary to readjust the upper and lower deviation of the stamping die until it meets the requirements.

7. After the final adjustment is completed, close the stamping die and make records and marks.