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Stationary shaft shoulder assistant supporting inclined penetration friction-stir welding device and method

A static shoulder, friction stir technology, applied in welding equipment, non-electric welding equipment, metal processing equipment, etc., can solve the problems of difficult non-welding defects and large heat input, so as to reduce welding heat input and avoid non-welding The effect of defect formation, reducing the likelihood of pin breakage

Active Publication Date: 2016-03-09
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The present invention proposes a device and method for obliquely penetrating friction stir welding with auxiliary support of a static shoulder. To cause other defects, design the stirring head with the length of the stirring needle greater than the thickness of the workpiece to be welded, and make the stirring needle obliquely penetrate the workpiece to be welded, and bear the welding axial load through the static shoulder with a blind hole under the workpiece to be welded, Obtain high-quality and high-strength friction stir welded joints while completely avoiding the formation of non-welded defects

Method used

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  • Stationary shaft shoulder assistant supporting inclined penetration friction-stir welding device and method

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specific Embodiment approach 1

[0022] Specific implementation mode 1: Combination Figure 1 to Figure 2 To illustrate this embodiment, a stationary shaft shoulder auxiliary support inclined penetration friction stir welding device of this embodiment is characterized in that it includes a long needle stirring head 1, a stationary shaft shoulder 2, a translational slider 3, a linear guide 4 and Positioning fixture 5, the long needle stirring head 1 is composed of the upper shaft shoulder and the long stirring needle, the long stirring needle is fixedly installed at the lower end of the upper shaft shoulder, and the long stirring needle is arranged coaxially with the upper shaft shoulder, and the long needle stirring head 1 stirs The length of the needle is greater than the thickness of the workpiece to be welded; the cross section of the upper shaft shoulder and the long stirring needle are both circular;

[0023] The center of the stationary shaft shoulder 2 is processed with a circular blind hole, the diameter...

specific Embodiment approach 2

[0026] Specific implementation manner two: combination Figure 1 to Figure 2 To illustrate this embodiment, the length of the long stirring needle of the long needle stirring head 1 in this embodiment is 2mm larger than the thickness of the workpiece to be welded. This arrangement can eliminate root unwelded defects, and the rest is the same as the first embodiment.

specific Embodiment approach 3

[0027] Specific implementation mode three: combination Figure 1 to Figure 2 To describe this embodiment, the diameter of the end face of the stationary shoulder 2 of this embodiment is 5 mm larger than the diameter of the upper shoulder of the long needle stirring head 1. With this arrangement, the axial pressure completely acts on the stationary shaft shoulder 2, and good weld formation can be obtained. The other connection modes are the same as the first or second embodiment.

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Abstract

The invention discloses a stationary shaft shoulder assistant supporting inclined penetration friction-stir welding device and method, relates to a friction-stir welding device and method, and aims at solving the problem that an existing friction-stir welding method is difficult in avoiding a non-welding-on defect, or the problem that although the non-welding-on defect can be avoided, overlarge thermal input and other defects are caused. The friction-stir welding device provided by the invention comprises a long-needle stirring head, a stationary shaft shoulder with a blind hole, a translation sliding block, a linear guideway and a positioning clamping apparatus. During welding, the liner guideway, a welded workpiece and the positioning clamping apparatus are stationary, and the long-needle stirring head, the stationary shaft shoulder and the translation sliding block move along a welding direction, so as to realize a welding process. The stationary shaft shoulder assistant supporting inclined penetration friction-stir welding method provided by the invention comprises the following steps: 1, assembly of the device; 2, fixing of the long-needle stirring head and the stationary shaft shoulder; 3, friction-stir welding. The device and the method, provided by the invention are used for friction-stir welding.

Description

Technical field [0001] The invention relates to a friction stir welding device and method, in particular to a static shaft shoulder auxiliary support inclined penetration friction stir welding device and method, and belongs to the technical field of welding. Background technique [0002] The friction stir welding method has the advantages of small welding deformation, high joint quality and green energy saving. It has a wide range of applications in the fields of aerospace and rail transit. However, due to the limitation of the friction stir welding process, the length of the stir needle used is generally less than the thickness of the workpiece to be welded to ensure that the shoulder can be in close contact with the workpiece to be welded to obtain a good weld formation. It is precisely because the length of the stirring pin is less than the thickness of the workpiece to be welded, it is difficult to avoid the formation of unwelded defects at the root of the weld, and this defe...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K20/12
CPCB23K20/122B23K20/1245
Inventor 刘会杰胡琰莹王欢王天聪李继超曾凡勇林喆
Owner HARBIN INST OF TECH
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