Opposite teeth extruding type fine-blanking die and fine-blanking method adopting same

Abstract

The invention discloses an opposite teeth extruding type fine-blanking die and a fine-blanking method using the die. Opposite tooth-shaped plates and convex-concave dies are arranged on the upper side of an axial combining surface of the die; teeth cavity dies and anti-jacking plates are arranged on the lower side of the axial combining surface of the die; the opposite tooth-shaped plates and the teeth cavity dies are respectively provided with protruded annular gears, the section of the annular gear is of triangle tooth shape, and the contact lines of the annular gears and a blank are respectively arranged outside a blank upper workpiece outline and surround the outline of the workpiece. When a workpiece is blanked, an upper annular gear and a lower annular gear are respectively pressed into the workpiece to prevent a blank material from flowing in the horizontal direction, and the previous-period extrusion is carried out on the blank material so as to form a strong three dimension compressive stress inside the blank material, reduce the area of a tensile stress generated by the blank material in the blanking process, avoid the cracks, and eliminate sharp edges and burrs of the workpiece. By the invention, fine-blanked workpieces with good quality and high precision can be manufactured by utilizing a universal blanking device so as to promote the development of fine-blanking industry.

Description

technical field [0001] The invention relates to a fine-blanking die, in particular to an opposed-tooth extruding fine-blanking die and a fine-blanking method using the die. Background technique [0002] Fine blanking is to directly punch out parts with good cross-section quality and high dimensional accuracy on the sheet metal by using a mold with a special structure. It is suitable for the production of large quantities of high-precision plate-shaped parts. It is currently used in clocks, cameras, precision instruments, household appliances and other industries. , has been widely used. In the usual fine blanking process, the ring gear is used to press the fine blanking die with strong edge pressing. In the fine blanking process, the ring gear with a triangular tooth cross section is first pressed into the blank, and the mechanical blocking effect of the ring gear and the friction between the blank material and the die are used. force to prevent the blank material from flow...

AI Technical Summary

Problems solved by technology

[0003] In order to solve the problem that the fine blanking die of the ring gear strong blanking die is not suitable for the fine blanking processing of thick plates and high strength and low plasticity plates, the present invention proposes a fine blanking die of opposed tooth extrusion type and a fine blanking method using the die , in the fine blanking process, the three-dimensional compressive stress in the stamping deformation zone is increased, and the problem of fine blanking processing of thick plates and high-strength, low-plastic plates is solved

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