Welding method for molded surface of invar alloy composite material forming mold

A composite material, Invar technology, applied in welding equipment, welding medium, welding equipment and other directions, can solve the problems of low welding efficiency, long manufacturing cycle, restricting production capacity, etc., to improve welding efficiency, shorten manufacturing cycle, prevent Effects of air leakage and slag inclusion

Pending Publication Date: 2022-02-08
CHANGHE AIRCRAFT INDUSTRIES CORPORATION
View PDF5 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The manufacturing difficulty of Invar alloy (INVAR) frame mold lies in the extremely high welding requirements, all welds must not have blisters and slag inclusions to cause air leakage, at this stage only tungsten argon arc welding can be used, the welding efficiency is extremely low, and a single worker One day (8 hours) welding length is less than 1 meter, resulting in too long manufacturing cycle, which greatly restricts the production capacity of the INVAR frame mold in the workshop

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
  • Welding method for molded surface of invar alloy composite material forming mold
  • Welding method for molded surface of invar alloy composite material forming mold

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0023] The purpose of the present invention is to explore a new welding method for Invar alloy (INVAR) thick plate δ20mm or more, improve the welding efficiency of the Invar alloy (INVAR) composite material forming mold surface, greatly shorten the manufacturing cycle of the mold surface, and prevent the welding of the mold surface. The phenomenon of air leakage and slag inclusion occurs.

[0024] It should be noted that the main content of the invention is to change the welding method: carry out systematic process tests by replacing argon arc welding (TIG welding) with gas shielded welding (MIG welding), and explore a new welding process method for INVAR steel.

[0025] To achieve the above object, the present invention provides the following technical solutions:

[0026] Conduct welding tests to determine relevant welding parameters

[0027] Change the welding method: gas shielded welding (MIG welding) instead of argon arc welding (TIG welding)

[0028] 1. Selection of pro...

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 provides a welding method for the molded surface of an invar alloy composite material forming mold. The method comprises the following steps: selecting binary mixed protective gas, wherein the binary mixed protective gas comprises argon gas and helium gas; determining the target gas pressure of the binary mixed protective gas; determining a welding groove angle of the molded surface of the invar alloy composite material forming mold as a target angle; determining a target welding voltage and a target welding current; and based on the target air pressure, the target welding voltage and the target welding current, welding the molded surface of the invar alloy composite material forming mold. According to the method, the welding efficiency of the molded surface of the invar composite material forming mold is improved, the manufacturing period of the molded surface is greatly shortened, and the phenomena of air leakage and slag inclusion of the molded surface are prevented.

Description

technical field [0001] The invention belongs to the technical field of helicopter manufacturing technology, and in particular relates to a welding method for forming a model surface of an invar alloy composite material. Background technique [0002] Because the thermal expansion coefficient of Invar alloy (INVAR) is close to that of composite materials, Invar alloy (INVAR) materials are widely used in the manufacture of molding dies in the molding process of aerospace composite parts. [0003] The manufacturing difficulty of Invar alloy (INVAR) frame mold lies in the extremely high welding requirements, all welds must not have blisters and slag inclusions, which will cause air leakage. One day (8 hours) the welding length is less than 1 meter, resulting in an excessively long manufacturing cycle, which greatly restricts the production capacity of the INVAR frame mold in the workshop. Contents of the invention [0004] In view of the above technical problems, the present i...

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): B23K9/173B23K33/00B23K35/38
CPCB23K9/173B23K9/0026B23K33/004B23K35/383
Inventor 王光
Owner CHANGHE AIRCRAFT INDUSTRIES CORPORATION
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