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Under what circumstances do you need to increase or decrease the blanking gap value when processing stamping parts?

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In the process of stamping parts, under what circumstances should the blanking gap value be appropriately increased or decreased? The following Zhejiang Baifudu Electromechanical editor will take you to understand!

Under the same conditions, according to different quality requirements of parts and the production practice of stamping parts, the pressure gap can be appropriately increased compared with the blanking gap.

When punching punching parts (generally, the hole diameter is smaller than the material thickness), the punch is easy to break, and the gap should be large; but at this time, effective measures should be taken to prevent the waste from rising.

The gap of the cemented carbide punching die should be about 30% larger than that of the steel die. When the wall of the convex and concave die of the composite film is thin, in order to prevent expansion and cracking, according to different product quality requirements, the gap of the punching die should be enlarged. With the increase of the silicon content in the medium, the gap increases correspondingly, and the enlarged gap is determined by experiments.

When the elastic pressing device is used for stamping parts, the gap can be larger. According to the actual application of different elastic pressing devices, when measuring the increased gap and high-speed stamping, the mold is easy to heat up, and the gap should be increased. If the number of trips per minute exceeds 200, the gap should be increased by about 10%. When EDM the edge of the die, the effect of the metamorphic layer should be considered in the gap. When heating and punching, the gap should be reduced, and the amount of gap reduction should be measured according to the actual situation. When the concave die is an inclined-wall cutting edge, the clearance should be smaller than that of the straight-wall cutting edge. For holes that need to be tapped, the clearance should be smaller, and the amount of clearance reduction is determined by the actual situation.

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