Three-layer gas protection cover for titanium and titanium alloy friction stir welding

A technology of friction stir welding and titanium alloy, which is applied in the direction of welding equipment, non-electric welding equipment, metal processing equipment, etc., can solve the problems of small area protected by welding, lack of gas protection of formed weld seam, performance degradation, etc., to achieve good Protecting effect, ensuring the quality of friction stir welding, and stabilizing the effect of gas shielding

Active Publication Date: 2015-03-04
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to solve the problem that the existing protective device has a small area of ​​welding protection and lacks the necessary gas protection for the formed weld, so that the performance of the weld is reduced due to poor protection during the forming and cooling process
Furthermore, a three-layer gas shield for friction stir welding of titanium and titanium alloys is provided

Method used

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  • Three-layer gas protection cover for titanium and titanium alloy friction stir welding
  • Three-layer gas protection cover for titanium and titanium alloy friction stir welding
  • Three-layer gas protection cover for titanium and titanium alloy friction stir welding

Examples

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specific Embodiment approach 1

[0012] Specific implementation mode one: combine figure 1 , figure 2 and image 3 Describe this embodiment mode, a kind of titanium and titanium alloy friction stir welding of this embodiment mode three-layer gas protection cover comprises inner gas cover 1, middle layer gas cover 2, outer gas cover 3, inner gas cover inlet nozzle 4, middle layer gas cover Cover air intake nozzle 5, outer air cover cylindrical gas inlet section intake nozzle 6 and outer air cover trailing section intake nozzle 7; inner air cover 1, middle layer air cover 2 and outer air cover 3 are equipped with Through the cavity, the inner air cover 1 is installed in the cavity of the middle air cover 2, and the middle air cover 2 is installed in the cavity of the outer air cover 3,

[0013] The external shape of the inner gas hood 1 is composed of a cylindrical fitting section 1-1, a cylindrical gas inlet section 1-2 of the inner gas hood, and a frustum-shaped gas outflow section 1-3 of the inner gas hoo...

specific Embodiment approach 2

[0016] Specific implementation mode two: combination figure 1 , figure 2 and image 3 Describe this embodiment, the inner air cover 1 of this embodiment, the middle layer air cover 2, the outer air cover 3, the inner air cover intake nozzle 4, the middle layer air cover intake nozzle 5, the outer air cover cylindrical gas inlet section intake Mouth 6 and outer air cover trailing section inlet nozzle 7 are all made of stainless steel. This is set up to ensure a smooth surface and dimensional stability during long-term work. Other compositions and connections are the same as in the first embodiment.

specific Embodiment approach 3

[0017] Specific implementation mode three: combination figure 2 To illustrate this embodiment, the air inlet nozzle 4 of the inner gas hood in this embodiment is 1-2mm away from the inner wall of the cylindrical gas inlet section 1-2 of the inner gas hood. It is set in this way to ensure that gas flows into the inner gas hood 1 reliably. Other compositions and connections are the same as those in Embodiment 1 or Embodiment 2.

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Abstract

The invention discloses a three-layer gas protection cover for titanium and titanium alloy friction stir welding, relates to a three-layer gas protection cover, and solves the problems of an existing protection device that a welding area with trailing is smaller and a formed weld joint lacks of the necessary gas protection, so as to cause performance degradation due to poor protection in the weld joint forming and cooling process. The three-layer gas protection cover comprises an inner gas cover (1), a middle gas cover (2), an outer gas cover (3), an air inlet nozzle (4) of the inner gas cover, an air inlet nozzle (5) of the middle gas cover, an air inlet nozzle (6) at the cylindrical gas inlet section of the outer gas cover and an air inlet nozzle (7) at the trailing section of the outer gas cover; through cavities are axially formed in the inner gas cover (1), the middle gas cover (2) and the outer gas cover (3), the inner gas cover (1) is installed in the cavity of the middle gas cover (2) and the middle gas cover (2) is installed in a cavity of the outer gas cover (3). The three-layer gas protection cover provided by the invention is used for titanium and titanium alloy friction stir welding.

Description

technical field [0001] The invention relates to a three-layer gas shield, in particular to a three-layer gas shield for friction stir welding of titanium and titanium alloys, belonging to the field of welding technology. Background technique [0002] Friction stir welding, as a new type of connection technology, is a solid phase connection method first proposed and studied by the British Welding Institute in the early 1990s. Based on the many advantages of friction stir welding technology such as simplicity, high quality, high efficiency, environmental protection and automation, after more than 20 years of research and development worldwide, friction stir welding has achieved remarkable development and many successful achievements in the field of light metal materials. Industrial applications, among which high melting point materials such as titanium alloys have gradually become a research hotspot in friction stir welding. Different from low melting point materials, high me...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K20/14B23K20/12B23K20/26
CPCB23K20/122B23K20/14B23K20/26B23K2103/14
Inventor 刘会杰胡琰莹赵运强窦超王志国林喆
Owner HARBIN INST OF TECH
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