Extrusion machine for automobile exhaust pipe pressure device

Abstract

The invention relates to an extrusion machine for an automobile exhaust pipe pressure device, comprising an upper mold base, a lower mold base, an upper mold, an extrusion bottom plate, a lower mold, a load-bearing platform, a fixing plate and a thimble rod; the upper mold base and the upper The mold is fixed, the extrusion bottom plate is fixed on the load-bearing platform, the fixed plate is fixed on both sides of the load-bearing platform and the extrusion bottom plate, the lower mold base is located under the load-bearing platform, and the load-bearing platform has guide rod holes; the thimble rod is located in the middle of the lower mold base, and The lower mold base has guide rod holes, and the lower mold is fixedly connected to the extrusion base plate; the lower mold includes outer inserts, inner inserts and center inserts; the center insert is fixedly connected to the inner insert; the inner insert is fixedly set In the outer insert, the cross section of the outer insert is circular, the cross section of the inner insert is rectangular, the cross section of the central insert is rectangular, and the center part has a rectangular hollow. surplus cooperation. The invention solves the problems of easy cracking and short service life of the lower die, improves the service life of the lower die and increases working efficiency.

Description

technical field [0001] The invention relates to the field of mechanical forging, in particular to an extruder for an automobile exhaust pipe pressure device. Background technique [0002] As a kind of forging equipment, the extruder is often widely used in the casting process. It relies on the extruder to exert external force on the material to cause plastic deformation of the material, so as to obtain the extruded parts of the required shape and size. In the extrusion process, the stress of the cold extrusion punch varies with the extrusion method. The forward extrusion punch is mainly subjected to the compressive stress, while the reverse extrusion punch or the composite extrusion punch is under the extrusion process. During the working stroke, it is subjected to a large compressive stress, and it is subjected to a small tensile stress during the return journey. The tensile and compressive stresses are generated alternately. Whether it is forward extrusion or reverse extr...

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to overcome the problem of early wear and tear of the mold due to the local stress of the mold, and to provide a lower mold that disperses the stress concentrated on the lower mold step by step to protect the mold. effect

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