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Quality Improvement Method of Underwater Friction Stitch Welding

A friction stitch welding, quality technology, applied in welding equipment, non-electric welding equipment, metal processing equipment, etc., to improve welding quality, reduce or avoid cracking effect

Active Publication Date: 2020-10-30
天津益普科技发展有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to overcome the deficiencies of the prior art, aiming at the problems caused by the welding environment and technical characteristics of friction stitch welding, to provide a method for underwater friction stitch welding to stop cracking and improve welding quality

Method used

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  • Quality Improvement Method of Underwater Friction Stitch Welding
  • Quality Improvement Method of Underwater Friction Stitch Welding
  • Quality Improvement Method of Underwater Friction Stitch Welding

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Embodiment Construction

[0024] The technical solutions of the present invention will be further described below in conjunction with specific embodiments.

[0025] Friction stitch welding research was carried out on submerged arc welds with DH36 steel as base metal. The material of the stopper rods for the plug holes on both sides (odd-numbered welding areas) is Q345 steel, and the material of the stopper rods for the middle plug holes (even-numbered welding areas) is X65 steel. Attached Table 1 and Attached Table 2 are the main components and basic mechanical properties of DH36, submerged arc weld metal (Arc weld), Q345 steel and X65 steel. Attached Table 3 shows the process parameters of the friction stitch welding experiment. D13, D16 and D19 represent stopper rods with even hole depths of 13mm, 16mm and 19mm respectively. The specific plug hole and stopper rod structures are as follows (mm, °):

[0026] a:150, b:132, c:60, d:50, e: f: g: 19°, h: R3, i: j: 25°, k: 16

[0027] Attached Tabl...

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Abstract

The invention discloses an underwater friction stitch welding quality improvement method. The underwater friction stitch welding quality improvement method adopts a space welding method, odd-number unit welding lines are welded first, and then even-number unit welding lines are welded so as to avoid the deviation of a drill bit and to improve the drilling quality and even the welding quality. Meanwhile, the drilling depth of the even-number unit welding lines is greater than the drilling depth of the odd-number welding lines, so that cracking of the odd-number welding lines is prevented when the even-number unit welding lines are welded. The underwater friction stitch welding quality improvement method makes breakthroughs in the aspects of crack arrest of friction stitch welding underwaterwelding and improving welding quality to enable friction stitch welding to be possibly applied underwater, and far-reaching significance for the application and promotion of the friction stitch welding in deep water welding and repair is achieved.

Description

technical field [0001] The invention belongs to the technical field of underwater welding quality control, and more specifically relates to a method for improving the quality of underwater friction stitch welding. Background technique [0002] The marine field is one of the focuses of the world in the 21st century. In recent years, my country has paid more and more attention to the marine field. The 21st century can be said to be the century in which our country moves from near seas to far seas, from shallow seas to deep seas, and realizes the dream of becoming a maritime power. Advanced underwater welding, cutting and repairing technologies are one of the important technical guarantees for marine engineering construction and maintenance. The connection and repair of marine structures should be based on factors such as water depth, structural form, and importance, and an appropriate underwater connection method should be selected. Mechanical connectors are easy to install...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23K20/12
CPCB23K20/1225
Inventor 王东坡陈斯亮王志江滕金虎
Owner 天津益普科技发展有限公司
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