Plane edge-pressing and semi-fine blanking device and method

Abstract

The invention relates to a plane edge-pressing and semi-fine blanking device and a method. The device is provided with a plane pressure plate and a concave die, when a workpiece is punched, the plane pressure plate needs to enable edge-pressing force to press on the outer edge of a profile of the workpiece on a workpiece blank, and the edge-pressing force can generate great friction force betweenthe surface of the workpiece blank and the plane pressure plate and between the surface of the workpiece blank and the concave die, so as to prevent the material of the workpiece blank from flowing out of the profile of the workpiece. The device is matched with punching force, three-dimensional pressure stress is generated in the material of the workpiece blank in an extrusion zone, and plastic flow is generated, so as to enable the numerical values of the pressure stress in the three-dimensional directions to tend to be consistent, enable the material of the workpiece blank in the profile ofthe workpiece to be in the hydrostatic pressure state and have a maximal plastic deformation range, reduce a region for generating tensile stress in a shearing deformation zone and prevent the emergence of cracks on the surface of a cross section of the workpiece. By using the plane edge-pressing and semi-fine blanking device and the method, an ordinary punch can be used, the processing of a die is simple, a pressurization region on the workpiece blank can not cause damages, the processing cost is low, the quality of the workpiece is high, and the device and the method are convenient to popularize and apply in the punching industry.

Description

technical field [0001] The invention relates to a semi-fine blanking method, in particular to a flat blanking semi-fine blanking device and method. Background technique [0002] The fine blanking process of ring gear blanking is the most widely used fine blanking process at present, with the characteristics of high quality, high efficiency, low consumption and wide application range. Therefore, it has been widely used in the field of precision parts processing of products such as automobiles and motorcycles, office equipment, clocks, sewing machines and cameras. However, the fine blanking process of ring gear blanking requires the use of a special press that can provide three mechanical forces: main force, blank holder force and back pressure, and the cost of this type of special press is 5 to 10 times that of ordinary presses, which seriously affects The popularization and application of ring gear blanking fine blanking process. The mold used in the fine blanking process ...

AI Technical Summary

Problems solved by technology

[0003] In order to overcome the defects of complex equipment required for the ring gear blanking fine blanking process, high mold cost, and damage to the surface of the workpiece blank, the present invention proposes a flat blanking semi-fine blanking device and a method for realizing flat blanking semi-fine blanking. The technical solutions adopted are:

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