In the process of stamping, especially punching, stamping plants often encounter the phenomenon of punch cracking. Such problems often occur by replacing the new punch directly, rather than fundamentally dealing with the problem of punch cracking.

1. The generated waste will block the lower mold. Treatment plan: Correct the blanking hole from scratch so that the waste can fall smoothly.

2. The fixed part (splint) and guide part of the punching needle, the treatment plan: repair or cut the block from the headline to make the punching needle go up and down smoothly (withdrawal plate) offset.

3. The closing height of the stamping die is set too low, resulting in too long the part where the punch enters the lower die. Solution: Adjust the closing height of the punch to make the amount of punch entering the lower die appropriate.

4. The planning of the return plate is unreasonable, resulting in uneven force on the punching needle. Solution: Plan the gap between the return plate and the punching needle from scratch.

5. The edge of the punching needle is planned to be too short, and it collides with the withdrawal plate during work. Solution: Select a suitable punching needle from scratch, and perhaps add the length of the knife edge part. 6. The appearance of the punching needle shows strains and scratches, and the force of the punching needle is uneven when returning the material. Solution: Replace the new punching needle from scratch.

7. The edge of the punching needle is worn and the edge becomes dull. Solution: Grind the edge of the punching needle from scratch.

8. The selected punching needle is too thin, too long or not strong enough. Solution: The stamping processing plant needs to select other types of punching needles from scratch.

9. The hardness of the punching needle is not suitable, and the selected punching needle raw materials are not suitable. Treatment plan: replace the appropriate punching needle raw materials, or perform heat treatment.

10. The planning of the die positioning device is unreasonable, and the punching needle can only be punched to one side, so that the force of the punching needle is uneven. Solution: Adjust the die positioning device so that the intact material can be cut when the punching needle is punched.

11. The punch needle is not fixed firmly enough, and it shakes during the stamping process. Solution: Fix the hedge needle from the head so that it cannot move up and down.

This article is from EMAR Mold Co., Ltd. For more EMAR related information, please click: www.sjt-ic.com!