Near-net forming die for high-strength internal hexagonal through-hole bolt

Abstract

The invention discloses a near-net forming die for a high-strength internal hexagonal through-hole bolt. The near-net forming die mainly comprises an upper die plate, movable press blocks, a male die upper fixing plate, an internal hexagonal through-hole forming punch, a head forming boss press block, a knockout seat, a knockout plate, a female die prestress ring, a forming female die, a base plate, a lower die plate and an ejector. An axial through hole is formed in the middle of the internal hexagonal through-hole forming punch. The head forming boss press block is penetratingly sleeved on a rod body of the internal hexagonal through-hole forming punch through the axial through hole. A plunger tip of the internal hexagonal through-hole forming punch extends out of the axial through hole. The near-net forming die has the main advantages that the internal hexagonal through-hole forming punch and the head forming boss press block are separated from each other and designed to be penetratingly sleeved with each other, so that an inner hexagonal through hole and a head boss can be formed sequentially, defects such as metal folding and turbulence generated during simultaneous forming of the inner hexagonal through hole and the head boss can be avoided, and a blank adhered on the plunger tip is facilitated to be knocked out by the knockout plate after completion of forming.

Description

technical field [0001] The invention belongs to the plastic cold extrusion processing and forming technology of metal materials, that is, the near-net-shaping technology, in particular to a near-net-shaping mold for high-strength internal hexagonal through-hole bolts. Background technique [0002] The hexagon socket bolts in the end couplings on tracked vehicles are one of the important parts of this type of vehicle. Traditionally, solid structures are used. The traditional solid structure has a long production cycle, high manual labor intensity, and serious waste of materials, making it difficult to meet the needs of mass production. The current development trend is that the mobility of the vehicle must be reduced in order to improve its maneuverability. However, the amount of hexagon socket head bolts in the whole vehicle is quite large. If the hexagon socket head bolts are changed to hexagon socket through hole structures, the demand for vehicle weight reduction can be ...

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to address the deficiencies in the prior art, and propose a near-net forming mold for high-strength internal hexagonal through-hole bolts. The purpose is to effectively overcome the problems caused by the existing traditional processing and manufacturing methods, effectively reduce the forming process, and greatly Improve material saving manufacturing cost

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