Die gap of deep throat punch

Die gap of deep throat punch
　　
Deep throat punch die gap refers to the sum of the gaps on both sides when the punch enters the lower die. It is related to plate thickness, material and stamping process. Choosing a suitable die gap can ensure good punching quality, reduce burrs and collapse, keep the plate flat, effectively prevent stripping, and extend the life of the die.
　　
By checking the stamping waste, you can determine whether the mold gap is appropriate. If the gap is too large, the waste will have rough undulating fracture surfaces and smaller shiny surfaces. The larger the gap, the larger the angle formed by the fracture surface and the bright surface, which will cause curling and fracture during punching, and even a thin edge protrusion will appear. On the contrary, if the gap is too small, the scrap will have a small angle fracture surface and a larger bright surface.
　　
When performing partial punching such as grooving, nibbling, and shearing, the lateral force will deflect the punch and cause the unilateral gap to be too small. Sometimes the edge offset may scratch the lower die and cause rapid wear of the upper and lower dies. When the mold is punched with the best gap, the broken surface and the bright surface of the scrap have the same angle and overlap each other, so that the punching force is minimized and the punching burr is also small.