Rib cavity protection method for welding of U-shaped rib of titanium alloy frame vehicle body

A titanium alloy, U-shaped technology, applied in the direction of welding medium, welding equipment, welding equipment, etc., can solve the problems of inability to protect air pollution

Inactive Publication Date: 2020-02-28
JIANGLU MACHINERY & ELECTRONICS GROUP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, using this method to weld the U-shaped ribs of the titanium alloy car body cannot protect the root of the weld in the U-shaped rib cavity and the base metal on the back side from being polluted by air.

Method used

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  • Rib cavity protection method for welding of U-shaped rib of titanium alloy frame vehicle body
  • Rib cavity protection method for welding of U-shaped rib of titanium alloy frame vehicle body

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] A rib cavity protection method for U-shaped rib welding of a titanium alloy frame car body. Firstly, a process hole 9 is arranged on the upper surface of the U-shaped rib 1, and then the U-shaped rib 1 is fitted to the surface of the deck 5 and the side plate 6 to form an extrusion Cavity 7, and control the gap formed by lamination should be <3mm, then fill the argon gas from the process hole 9 into the extrusion cavity 7 to squeeze out the air, after the air is squeezed out from the extrusion cavity 7, start Arc welding U-shaped rib 1 and deck 5, U-shaped rib 1 and side plate 6.

[0022] The number of process holes 9 arranged on the U-shaped bar 1 is determined according to the length of the welded U-shaped bar 1. When the length of the U-shaped bar 1<400mm, drill a process hole 9; when 400mm≤U-shaped bar 1 length<800mm, Set two process holes 9 symmetrically with the left and right symmetry lines of the U-shaped rib 1 as the symmetrical axis, and the distance between t...

Embodiment 2

[0030] A rib cavity protection method for welding U-shaped ribs of a titanium alloy frame car body First, a process hole 9 is provided on the upper surface of the U-shaped rib 1, and then the U-shaped rib 1 is fitted with the surface of the deck 5 and the side plate 6 to form an extrusion cavity 7, and control the gap formed by lamination should be <3mm, then fill the argon gas from the process hole 9 into the extrusion chamber 7 to squeeze out the air, after the air is squeezed out from the extrusion chamber 7, start to work Arc welding U-shaped rib 1 and deck 5, U-shaped rib 1 and side plate 6.

[0031] The number of process holes 9 arranged on the U-shaped bar 1 is determined according to the length of the welded U-shaped bar 1. When the length of the U-shaped bar 1<400mm, drill a process hole 9; when 400mm≤U-shaped bar 1 length<800mm, Set two process holes 9 symmetrically with the left and right symmetry lines of the U-shaped rib 1 as the symmetrical axis, and the distance...

Embodiment 3

[0039] A rib cavity protection method for U-shaped rib welding of a titanium alloy frame car body. Firstly, a process hole 9 is arranged on the upper surface of the U-shaped rib 1, and then the U-shaped rib 1 is fitted to the surface of the deck 5 and the side plate 6 to form an extrusion Cavity 7, and control the gap formed by lamination should be <3mm, then fill the argon gas from the process hole 9 into the extrusion cavity 7 to squeeze out the air, after the air is squeezed out from the extrusion cavity 7, start Arc welding U-shaped rib 1 and deck 5, U-shaped rib 1 and side plate 6.

[0040] The number of process holes 9 arranged on the U-shaped bar 1 is determined according to the length of the welded U-shaped bar 1. When the length of the U-shaped bar 1<400mm, drill a process hole 9; when 400mm≤U-shaped bar 1 length<800mm, Set two process holes 9 symmetrically with the left and right symmetry lines of the U-shaped rib 1 as the symmetrical axis, and the distance between t...

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Abstract

The invention relates to a rib cavity protection method for welding of a U-shaped rib of a titanium alloy frame vehicle body. The rib cavity protection method comprises the steps that a process hole is formed in the upper surface of the U-shaped rib, then the U-shaped rib is attached to the surface of a deck and the surface of a side plate to form an extrusion cavity, and a gap formed through attachment is controlled to be smaller than 3 mm; and then argon is injected into the extrusion cavity from the process hole to extrude and exhaust air, and after the air is extruded and exhausted from the extrusion cavity, arc starting is started to weld the U-shaped rib, the deck, the U-shaped rib and the side plate. According to the rib cavity protection method, the root of a weld joint and back matrix metal can be protected by the argon in the cavity, the welding quality of the U-shaped rib is ensured, the situation that the weld joint becomes brittle and plasticity is reduced due to the factthat titanium alloy absorbs oxygen, nitrogen and hydrogen in the air is avoided, and the overall mechanical property is reduced.

Description

technical field [0001] The invention relates to a welding protection technology, in particular to a method for protecting a rib cavity of a U-shaped U-shaped rib welding of a titanium alloy frame body of a special vehicle. Background technique [0002] Titanium and titanium alloys have the advantages of low density, high tensile strength, corrosion resistance, etc., and have good high and low temperature performance, and are more and more widely used in aviation and aerospace. In recent years, with the decline in the price of titanium alloys, special vehicles have gradually begun to verify the use of titanium alloys. [0003] Due to the outstanding characteristics of titanium alloys such as high melting point, poor thermal conductivity, small linear expansion coefficient, and high resistivity, during the welding process of titanium alloys, the size of the liquid molten pool metal is large, the high temperature residence time is long, and the cooling speed is slow. The chemi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K31/02B23K35/38
CPCB23K31/02B23K35/383B23K2101/006B23K2103/14
Inventor 陈娟张粉萍孙钟亮邓细望李松伟熊明定赵泳张冬庆郝子龙彭光华
Owner JIANGLU MACHINERY & ELECTRONICS GROUP
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