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Deposition friction stir welding process and apparatus

A technology of friction stir welding and friction heating, which is applied in welding equipment, welding/welding/cutting items, non-electric welding equipment, etc., and can solve problems such as potential safety hazards

Inactive Publication Date: 2007-06-13
GENERAL ELECTRIC CO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In addition, the generation of welding spark material poses a safety hazard for operators and requires further post-processing

Method used

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  • Deposition friction stir welding process and apparatus
  • Deposition friction stir welding process and apparatus
  • Deposition friction stir welding process and apparatus

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Embodiment Construction

[0021] Applicants have disclosed a friction stir welding method that can compensate for the problems of weld sparks and general thinning of material along the joint during the solid state joining operation of two or more workpieces. According to the friction stir welding method disclosed in the present invention, it utilizes the so-called process of depositing additional solid material (herein also referred to as filler material) along the joint area of ​​the joint joint during friction stir welding of two or more butt-joint workpieces. depositional friction stir welding method. As described in detail below, additional solid material is introduced into the joint region in such a way as to pin down the weld free surface and shape the weld profile. Likewise, final welds can be formed with thicker cross-sectional thicknesses than prior art friction stir welding methods, thereby overcoming many of the above-mentioned prior art problems and providing a variety of Application, more...

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Abstract

A deposition friction stir weld process of joining work pieces includes placing a filler material on and about a joint line formed by butting a first work piece surface against a second work piece surface; and frictionally heating the filler material to soften the filler material and portions of the first and second work piece surfaces in thermal contact with the filler material and form a weld between the first and second work pieces, wherein frictionally heating is at a temperature below a melting point of the filler material and the first and second workpiece surfaces. Also disclosed herein are friction stir welding assemblies for providing the deposition friction stir weld as well as processes for depositing filler material and contouring a workpiece surface.

Description

technical field [0001] The present invention relates generally to friction stir welding and, more specifically, to a friction stir welding process that includes providing an additional source of solid state during friction stir welding. Background technique [0002] Friction stir welding is a solid state joining method that provides material deformation similar to that of extrusion forging. Since the friction stir welding method is performed at a temperature below the melting point of the workpiece material, defects related to solidification, such as are common in fusion type welding, are basically eliminated, and friction stir welding generally provides high joint strength. In addition, the low heat input used in the friction stir welding method is contrary to other welding methods, resulting in less residual stress, less deformation and less shock affecting the final metallographic properties of the workpiece. Many joint designs can utilize friction stir welding, includin...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K20/12B29C65/06
CPCB23K20/1245B23K2201/18B23K20/128B23K20/1255B23K2101/18
Inventor D·P·米卡
Owner GENERAL ELECTRIC CO
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