Eureka AIR delivers breakthrough ideas for toughest innovation challenges, trusted by R&D personnel around the world.

Preforming method for high-strength steel reducing tubular part

A technology for pre-forming and tubular parts, which is used in forming tools, metal processing equipment, manufacturing tools, etc., can solve the problems of inability to guarantee the strength of pipe parts, serious wall thickness reduction of high-strength steel pipe parts, and wrinkling forming.

Pending Publication Date: 2022-06-24
HARBIN INST OF TECH AT WEIHAI +1
View PDF12 Cites 1 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, when high-strength steel is used as a pipe fitting, its processing method is still insufficient, and the strength of the pipe fitting cannot be guaranteed.
There are various tubular parts on the car body. The processing of existing metal pipe parts usually adopts the following two methods: one is to form in a soft state first, and then quench the process route to improve the strength of high-strength steel pipe parts. External quenching is easy to ensure the effect of heat treatment, but the disadvantage is that quenching deformation cannot be avoided; the other is thermal expansion technology. The disadvantages of this method are: the required air pressure is too large, the wall thickness of high-strength steel pipes is seriously A series of problems such as uniformity, broken tubular parts, wrinkled forming defects, etc.

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
  • Preforming method for high-strength steel reducing tubular part
  • Preforming method for high-strength steel reducing tubular part
  • Preforming method for high-strength steel reducing tubular part

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0029] The following embodiments in conjunction with the accompanying drawings are only intended to illustrate the technical solutions described in the claims, and are not intended to limit the protection scope of the claims.

[0030] A pre-forming method for high-strength steel variable-diameter tubular parts, comprising selecting a tube blank 10, preparing a tube blank forming die, the tube blank forming die comprising a pre-forming die and a final forming die, the pre-forming die and the final forming die The mold has a similar structure, and the structure of the mold cavity is adjusted according to the actual structure of the formed pipe fitting and the requirements in the forming process; the pre-forming method for the high-strength steel variable-diameter tubular member includes the following steps:

[0031] Step 1, seal and pressurize; seal both ends of the tube blank 10, and inflate the cavity to a pressure P, 0.1MPa≤P≤2MPa;

[0032] Step 2, electrode heating; the two ...

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

PropertyMeasurementUnit
angleaaaaaaaaaa
Login to View More

Abstract

The invention relates to a preforming method for a high-strength steel reducing tubular part, and belongs to the technical field of metal forming machining. A preforming method for a high-strength steel reducing tubular part comprises the steps of selecting a tube blank and preparing a tube blank forming die, and is characterized in that the tube blank forming die comprises a preforming die and a final forming die; the preforming method for the high-strength steel reducing tubular part comprises the following steps: step 1, sealing and pressurizing; step 2, electrode heating; step 3, carrying out constant-temperature preforming; fourthly, heat preservation and mold moving are conducted; and fifthly, final forming is conducted. According to the method, two-step operation of preforming and final forming is carried out, and a heat preservation moving mode is adopted between the two steps, so that metal internal structure conversion between the two steps is improved, and the performance of the pipe fitting is improved.

Description

technical field [0001] The invention relates to a preforming method for high-strength steel variable-diameter tubular parts, belonging to the technical field of metal forming processing. Background technique [0002] High-strength steel has a high mass-strength ratio and has excellent weight reduction effect. Therefore, high-strength steel has been rapidly developed and widely used in the automotive industry, so as to achieve the purpose of lightening and safety of automobiles. However, when high-strength steel is used as a pipe fitting, its processing method is still insufficient, and the strength of the pipe fitting cannot be guaranteed. There are various tubular parts on the car body. The processing of the existing metal pipe parts usually adopts the following two methods: one is to first form in a soft state, and then quench the process route to improve the strength of high-strength steel pipe parts. External quenching is easy to ensure the effect of heat treatment, but...

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
Patent Type & Authority Applications(China)
IPC IPC(8): B21D22/02B21D37/10
CPCB21D22/02B21D37/10B21D26/033B21D26/041B21D26/047B21D26/053B21D37/16
Inventor 初冠南孙磊谢文才张存生袁安营方刚杨琴
Owner HARBIN INST OF TECH AT WEIHAI
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
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