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

Abstract

The invention provides a shear-extrusion type gear-ring-free fine blanking device and method. The device comprises a two-segment male die in a plane pressing plate and a counter-ejector rod which is opposite to the male die and arranged in a female die. The shape of a cavity of the female die is matched with a fine blanking part. The outline size of the outer segment of the male die is larger than the size of the cavity of the female die, and a negative gap is formed by cutting edges of the male and female dies; the outline size of the inner segment of the male die is smaller than the size of the cavity of the female die, and a positive gap is formed by the cutting edges of the male and female dies. By means of the shear-extrusion principle, by designing the two-segment male die and using the action of the plane pressing plate which replaces a V-shaped gear ring in the fine blanking process, compressed stress borne by a deformation area material is increased, separation between the parts and boards is ensured, the fine blanking parts high in section quality can be produced, a V-shaped gear ring pressing plate in a fine blanking die can be omitted, materials are saved, and the machining and maintenance cost of the die is also reduced.

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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