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Combination Stirring Head for Friction Stir Welding Can Reduce Thickness of Weld Thinning

A friction stir welding and stirring head technology, which is applied in the field of machining tools, can solve problems such as the thinning of welding seam thickness, and achieve the effects of improving production efficiency, improving practicability, and controlling the thinning effect of welding.

Inactive Publication Date: 2012-02-01
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] The purpose of the present invention is to design a combined stirring head that can effectively control the thickness of the weld seam in the process of friction stir welding in view of the fact that the existing stirring head for welding cannot solve the problem of thinning of the weld seam

Method used

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  • Combination Stirring Head for Friction Stir Welding Can Reduce Thickness of Weld Thinning
  • Combination Stirring Head for Friction Stir Welding Can Reduce Thickness of Weld Thinning
  • Combination Stirring Head for Friction Stir Welding Can Reduce Thickness of Weld Thinning

Examples

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Effect test

example 1

[0040] Using high-speed steel as the tool material, using turning, milling, planing and drilling and other processing methods to process the stirring needle, inner shaft shoulder, clamping handle and support platform of the stirring matrix and the blade welded on the tool base on the outer shaft shoulder respectively according to the processing technology , and the hardness of the above-mentioned parts is increased to 55-65HRC by heat treatment, and the corresponding parts are finely ground. The outer shoulder sleeve of the outer shoulder is made of 45# steel, which is processed according to the processing methods such as turning, milling, drilling and tapping, and the blade is welded to the tool base on the outer shoulder sleeve by brazing technology . Use a hand-held grinder to remove protrusions around the cutter. External shoulder fixing screws are purchased directly from the market according to specifications. The thread angle on the stirring needle is 60°, the thread g...

example 2

[0044] Using cemented carbide (tungsten-titanium-cobalt alloy) as the tool material, the stirring pin, inner shaft shoulder, clamping handle and support platform of the stirring matrix, and the blade welded on the tool base on the outer shaft shoulder are respectively processed through corresponding processing methods and processing techniques , its hardness reaches 92.5HRA, and the corresponding parts are finely ground. The outer shoulder sleeve of the outer shoulder is made of 45# steel, which is processed according to the processing methods such as turning, milling, drilling and tapping, and the blade is welded to the tool base on the outer shoulder sleeve by brazing technology . Use a hand-held grinder to remove protrusions around the cutter. External shoulder fixing screws are purchased directly from the market according to specifications. The thread angle on the stirring needle is 55°, the depth of the thread groove on the stirring needle is 3mm, the depth of the conca...

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Abstract

A combined stirring head for friction stir welding capable of reducing the thinning thickness of the weld, characterized in that the stirring head is mainly composed of a stirring head base and an outer shaft shoulder; the stirring head base is mainly composed of a clamping handle, a supporting shoulder, an inner shaft shoulder and stirring needle; stirring needle and support handle are integrated with the inner shaft shoulder; the stirring needle is threaded and at least four thread grooves; one end of the inner shaft shoulder is provided with a concave spherical crown and a U-shaped notch; the outer The shoulder is mainly composed of an outer shoulder sleeve, a tool base and a blade; the outer shoulder sleeve on the outer shoulder is a cylindrical sleeve structure, and the outer surface of the outer shoulder sleeve is drilled with holes perpendicular to the rotation axis of the inner shoulder. The fixed thread through hole; one end of the outer shoulder sleeve is provided with a tool base integrated with the outer shoulder sleeve, the blade is welded on the tool base, the outer shoulder is sleeved on the inner shoulder of the stirring head, and passed through External shoulder set screw fixation. The invention can effectively control the thinning effect of the friction stir welding weld seam, and meanwhile can obtain high-quality welding surface.

Description

technical field [0001] The invention relates to a machining tool, in particular to a stirring head for friction welding, in particular to a combined stirring head for friction stir welding which can reduce the thinning thickness of the weld seam. Background technique [0002] As we all know, friction stir welding (FSW) is a new solid-state welding technology, and its working principle is very simple. It was invented by the British Welding Institute (TWI) in 1991 (invention patent US5460317). The principle of this technology is to use a high-speed rotating stirring head (FSW Tool) to insert into the weld, and frictional heat is generated between the stirring head and the workpiece to make the workpiece in The plastic state is crushed, mixed, and connected together under a certain pressure. The mixing head rotates at a high speed and moves forward. The metal in the plastic state is continuously moved from the front end to the rear end. Through the extrusion joint action of the...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23K20/26B23K20/12
Inventor 汪洪峰左敦稳黎向锋于守鑫缪宏邵定林
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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