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
View PDF0 Cites 5 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

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

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Machining process of hollow stepped shaft
  • Machining process of hollow stepped shaft
  • Machining process of hollow stepped shaft

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0036] Example

[0037] In order to solve the problem of cold heading forming of a hollow stepped shaft, the present invention adopts a five-die and five-stroke forming device to realize the cold heading forming of a 5-step stepped shaft through five-station continuous forming.

[0038] As attached Figure 1a Shown is the first step to cut the blank by the cold heading machine: the continuous cold heading wire is cut one by one by the plastic shear deformation method, and the cut length is converted by the principle of conservation of part volume. The used mold has a wire mold and a shear mold. The center holes of the two molds contact the openings as the cutting edge, and move staggered to complete the cutting action. Generally, the diameter of the wire mold = wire diameter + 0.05mm, and the diameter of the cut mold = wire Diameter +0.10mm.

[0039] As attached Figure 1b Shown is the blank of the second step of end face shaping and blank pre-positioning hole forming station, the sh...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

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

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
IPC IPC(8): B23P15/00
CPCB23P15/00
Inventor 谢向君伍铁忠
Owner SHANGHAI HONGJI METAL PRODS
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap