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Machining process of hollow stepped shaft

A processing technology and a step shaft technology, which is applied to the processing technology field of a hollow step shaft, can solve the problems of low production efficiency and high raw material cost, and achieve the effects of low production cost, high raw material utilization rate and good mechanical performance.

Pending Publication Date: 2019-04-05
SHANGHAI HONGJI METAL PRODS
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Problems solved by technology

[0004] The purpose of the present invention is to provide a processing technology for hollow stepped shafts in view of the technical defects of high raw material cost and low production efficiency in the existing processing technology of hollow stepped shafts, which is mainly processed by cold heading and supplemented by drilling Firstly, the cold heading blank is formed on the five-station cold heading forming machine, and then the center hole is drilled on the specific equipment, which improves the production efficiency of the stepped shaft with the center hole, reduces the waste of raw materials, and can meet the requirements of mass production. need

Method used

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  • Machining process of hollow stepped shaft
  • Machining process of hollow stepped shaft
  • Machining process of hollow stepped shaft

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Embodiment

[0037] In order to solve the problem of cold heading forming of a hollow stepped shaft, the present invention adopts five-die and five-blow forming equipment, and realizes cold heading forming of five-stage stepped shafts through five-station continuous forming.

[0038] as attached Figure 1a Shown is the first step of cutting the blank by the cold heading machine: the continuous cold heading wires are cut off one by one by plastic shear deformation, and the cutting length is converted by the principle of part volume conservation. The molds used include a wire mold and a shear mold. The contact surface of the center holes of the two molds is used as the cutting edge. Diameter +0.10mm.

[0039] as attached Figure 1b Shown is the blank in the second step of end face shaping and blank pre-positioning hole forming station, the shaping die in the forming process, the upper part of the blank is wrapped in the die to shape the upper end face, the purpose is to ensure the flatness ...

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Abstract

The invention discloses a machining process of a hollow stepped shaft. The machining process comprises the steps of blank shearing by a cold heading machine, end face shaping and blank pre-positioninghole forming, tail small rod strong bundling, bundling of a small rod at the other end in a reducing mode and pre-positioning hole forming, large middle step heading, middle thin step forming / tail positioning hole and head chamfering and center hole drilling. According to the machining process of the hollow stepped shaft, the process of main cold heading and auxiliary drilling is adopted to machine molding parts, and the material utilization rate is significantly improved compared with a traditional full machining method; continuous cold heading machining is adopted to improve the productionefficiency; in the molding process, metal fibers of a blank are not cut off, and relatively strong mechanical properties can be ensured without heat treatment; and after cold heading molding, machining can be completed only with simple drilling equipment, and a lot of machining time and machining equipment costs are eliminated.

Description

technical field [0001] The invention belongs to the technical field of hardware spare parts processing, and specifically relates to a processing technology of a hollow stepped shaft. Background technique [0002] In the machinery industry, various hardware parts are usually used for processing and installation. For example, fasteners are a common hardware part, which is used to fasten two or more parts or components into a whole The general term for mechanical parts. [0003] Traditionally, the processing of the stepped shaft is completed by lathes, drilling machines and other machines. Large-diameter bars are selected, and multiple steps are turned on the lathe, and then drilled on the drilling machine. The material utilization rate in the whole processing process is low, the processing time is long, the production efficiency is low, and it is difficult to meet the needs of mass production. Contents of the invention [0004] The purpose of the present invention is to pr...

Claims

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Application Information

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IPC IPC(8): B23P15/00
CPCB23P15/00
Inventor 谢向君伍铁忠
Owner SHANGHAI HONGJI METAL PRODS
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