No matter what kind of work you are doing, it is common to have problems in the process of work. If you encounter problems, you must solve them in time to avoid causing bigger problems later. However, there is a problem that many users easily ignore when dealing with a problem, that is, they will not find the reason, just solve the problem directly. Before solving the problem, we must find out the reason first, so as to eliminate the root. Then we will understand what causes the punch to fall off in the stamping process?
- For the fixed structure of punch pressed in by interference fit, the punch is easy to loose and fall off because it fails to meet the required interference during manufacturing and is remedied by “twist extrusion and chiseling”.
- If the punch is not stepped or fixed with fasteners, the unloading force will increase and the punch will be pulled out when the thick, hard or viscous material is punched and the clearance between the discharge plate hole and the punch is too small.
- The rigidity of punch or die base is poor, and elastic deformation occurs in the process of blanking, which makes the punch collide with the discharge plate or gets stuck with the female die, which increases the unloading force and makes the punch pull out easily.
- If the gap between punch and die is too small and the working surface is rough or the gap is inclined to one side, the discharge force can be increased and the punch can be pulled out.
- The die with low melting point and die is easy to pull out when assembling.
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