Novel process for blanking of arc-shaped part of component

Abstract

The invention discloses a novel process for blanking of an arc-shaped part of a component, which is characterized by comprising the following steps: (1) first negative gap extrusion: the part of 0.02mm outside the final dimensional line of the product after cutting of a sheet is adopted as an extrusion line, and the bottom of an extrusion punch is extruded to the original thickness of the sheet; (2) second negative gap extrusion: the bottom of an extrusion punch is extruded to the original thickness of the sheet; (3) the part of 0.02mm inside the extrusion line is adopted as a cutting line, the residual thickness part of the sheet is cut downwards along the cutting line by the end of one side of a cutting punch, which is contacted with the sheet, and the extruded part of the sheet is cut.The problems of the prior art that corner collapse, high burrs and secondary cracking can be easily caused during cutting of small arc-shaped parts of the component can be solved. By adopting the novel process for blanking of the arc-shaped part of the component, the sectional quality and dimensional accuracy can be better guaranteed; and the service life of the blade can be prolonged, and the mold maintenance cost can be reduced.

Description

technical field [0001] The invention relates to a new punching process of the circular arc part of a component, in particular to a new punching process of the circular arc part of the component by extruding a plate with a negative gap. Background technique [0002] Such as Figure 1-Figure 3 As shown, the current stamping industry adopts the following process for cutting the small arc parts of parts: pre-cutting - the first finishing - the second finishing - the third finishing . With this kind of shearing process, problems such as slump, high burrs and secondary fractures are prone to occur in the small arc parts of the parts. The shearing of the gear shape is just an enlarged version of the small arc (inner and outer) shearing problem, and it is more prominent when the thickness of the plate is thicker. Such as Figure 4-5 As shown, even if the product is cut according to this process, the gear will collapse and secondary fracture, and the burrs will be inevitable. Th...

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Problems solved by technology

[0003] In order to solve the problems of shearing the small arc parts of the parts in the prior art, which are prone to collapse, high burrs and secondary fractures, the present invention provides a method that can better ensure the quality of the section and the dimensional accuracy; and can A new punching process for the arc part of the part that prolongs the life of the knife edge and reduces the maintenance cost of the mold

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