Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Integrated forming method for thick-wall hollow forge piece with boss on abnormal end face excircle

A technology of hollow forging and integral forming, which is applied in the field of forging, can solve the problems that it is difficult to meet the requirements of sampling performance and impact performance, the tendency of end surface cracking increases, the repair rate and scrap rate are high, and the operation process is simple and easy, and the manufacturing cycle is short. Effect of shortening and stable molding quality

Active Publication Date: 2014-03-26
TIANJIN HEAVY EQUIP ENG RES +1
View PDF8 Cites 5 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the large increase in wall thickness, the forgeability of the forging is poor, and the increase in the tensile stress at the end during the drawing of the mandrel increases the tendency of the end face to crack. It is difficult to meet the requirements of UT flaw detection, T / 4 sampling performance and impact performance, and the repair rate and scrap rate are very high in production (the first-time pass rate is only about 60%)

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
  • Integrated forming method for thick-wall hollow forge piece with boss on abnormal end face excircle
  • Integrated forming method for thick-wall hollow forge piece with boss on abnormal end face excircle
  • Integrated forming method for thick-wall hollow forge piece with boss on abnormal end face excircle

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0074] The present invention can form a thick-walled hollow forging with a special-shaped end face and a boss through the following process steps:

[0075] 1) First obtain the specific structural dimensions of the forging through the drawings, such as Picture 1-1 , 1-2 , 1-3, forgings can be divided into several parts according to their shape:

[0076] Straight step part 11, including characteristic dimensions: inner diameter D 3 , outer diameter D 2 , straight step length L 7

[0077] The tapered step 12 on one side, immediately after the straight step 11, includes the characteristic dimension: the outer edge of the large end D 1 , small end outer edge D 2 , cone opening angle θ 2 , the length of the tapered step L 8 , the distance from the tapered small end to the end face of the straight section step is L 7 .

[0078] The intermediate straight step portion 13 on the same side as the tapered step portion 12, immediately behind the tapered step portion 12, includes ...

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 an integrated forming method for a thick-wall hollow forge piece with a boss on the abnormal end face excircle. The method comprises the following steps: (1) obtaining a forge piece part graph comprising the shape and the size, (2) adopting a simulation die forging process to optimize the shape of a forge blank according to the shape and the size of a forge piece, and adopting the size invariable principle to calculate the size value of the forge value, (3) designing a combined die according to the forge piece and the forge blank, (4) die forging. According to the method, the forge blank is prefabricated, and the combined die is manufacture so as to conduct one-time die forging, so that forming effect is good, forging permeability is good, and a forging piece streamline is complete.

Description

technical field [0001] The invention belongs to the technical field of forging, and mainly relates to an integral near-net forming forging method of a thick-walled hollow forging with a special-shaped end face and a boss on the outer circle. Background technique [0002] In the production, the thick-walled hollow forgings with spatial curved surfaces at both ends and bosses on the outer circle are often forged as thick-walled cylindrical forgings after adding more process pieces on both ends and the outer circle according to the largest contour. The process route generally adopted in the traditional free forging production of thick-walled cylindrical forgings is: upsetting, punching, and mandrel elongation (horse bar reaming). Due to the substantial increase of the wall thickness and length of the forging, it has a great impact on the forging operation and the quality of the forging, especially the increase in the wall thickness has the greatest impact on the mechanical prop...

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): B21J5/00B21J1/00
Inventor 扬晓禹刘颖刘凯泉
Owner TIANJIN HEAVY EQUIP ENG RES
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com