Shear-extrusion type gear-ring-free fine blanking device and method

Abstract

A shear extrusion type gearless fine blanking device and method, including: a two-stage punch arranged in a flat platen and an anti-ejector arranged in a concave die opposite to the punch, wherein: the shape of the cavity of the concave mold It matches the fine blanking parts; the contour size of the outer part of the punch is larger than the size of the cavity of the concave die, and the cutting edge of the punch and die forms a negative gap; the contour size of the inner part of the punch is smaller than the size of the cavity of the concave die, and the edge of the punch and die The mouth forms a positive gap. The present invention utilizes the principle of shearing and extrusion, and replaces the role of the V-shaped ring gear in the fine blanking process by designing a two-stage punch plus a flat platen, thereby increasing the compressive stress on the material in the deformation zone and ensuring The separation of parts and sheets can produce fine-blanking parts with high cross-section quality, which can eliminate the V-shaped ring gear platen in the fine-blanking die, which not only saves materials, but also reduces the processing and maintenance costs of the die.

Description

technical field [0001] The invention relates to a technology in the field of mechanical processing, in particular to a shear extrusion type gearless fine blanking device and method. Background technique [0002] Fine blanking is an advanced sheet metal precision plastic forming technology. It uses a special mold structure on a three-action press, accompanied by suitable materials and lubricants, and can directly obtain parts with smooth shear surfaces and high dimensional accuracy. , is currently widely used in automobile manufacturing, aircraft manufacturing, general machinery and other departments. figure 1 A schematic diagram of the fine blanking process. The metal sheet 3 is located between the punch 1 , the V-shaped ring gear platen 2 , the die 4 , and the reverse ejector pin 5 . When starting to work, the V-shaped ring gear pressing plate presses down into the material; then the punch presses the material into the die while the reverse ejector rod withstands the lowe...

AI Technical Summary

Problems solved by technology

However, the use of V-shaped ring gear pressure plate also has the following disadvantages: 1) The manufacture of the ring gear pressure plate increases the processing difficulty and cycle of the mold, and the ring gear is easily damaged, which reduces the life of the ring gear pressure plate and increases the maintenance cost of the mold; 2) Since the ring gear has to be pressed into the sheet, the overlap is directly increased, resulting in waste of materials and reducing the utilization rate of materials

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