Ultrasonic welding method of Al/Ti dissimilar metal TIG (Tungsten Inert Gas) electrical arc micro-melting brazing and following welding

A dissimilar metal, ultrasonic welding technology, applied in the field of Al/Ti dissimilar metal TIG arc micro-melting brazing with welding ultrasonic welding, can solve the problems of difficult welding, metal brittle fracture, etc., to suppress shrinkage, achieve isochronous and The effect of stability

Inactive Publication Date: 2010-10-06
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When these conditions are not met and the physical and chemical properties are very different, brittle intermetallic compounds and eutectics will be produced, which are difficult to weld
If the intermetallic compound is dispersedly distributed between the alloy grains in the form of very fine inclusions, it may be completely harmless; if it appears between the grain boundaries in the form of bands or needles, or between two metals transition layer, there is a risk of brittle fracture of the metal

Method used

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  • Ultrasonic welding method of Al/Ti dissimilar metal TIG (Tungsten Inert Gas) electrical arc micro-melting brazing and following welding
  • Ultrasonic welding method of Al/Ti dissimilar metal TIG (Tungsten Inert Gas) electrical arc micro-melting brazing and following welding
  • Ultrasonic welding method of Al/Ti dissimilar metal TIG (Tungsten Inert Gas) electrical arc micro-melting brazing and following welding

Examples

Experimental program
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Effect test

Embodiment 1

[0017] Example 1: Combining figure 1 , figure 2 , a kind of Al / Ti dissimilar metal TIG electric arc micro-melting brazing with welding ultrasonic welding method, the steps are as follows:

[0018] Step 1: The aluminum plate and the titanium plate are connected in a V-shaped notch, clamped on the workbench by a clamp, and cleaned on the surface;

[0019] Step 2: By adjusting the position of the welding torch up and down to make the tungsten electrode of the welding torch and the test piece reach a reasonable welding height; adjust the ultrasonic emitting device up and down so that the vibrating ball is close to the surface of the test piece, the ultrasonic emitting device and the TIG welding torch always maintain a fixed position, and the ultrasonic vibration The distance between the action position and the center of the weld is always the same;

[0020] Step 3: By adjusting the ultrasonic generator left and right, measure the distance d from the contact point between the vi...

Embodiment 2

[0022] Embodiment 2: The present invention is based on solving the problems of intermetallic compounds and shrinkage cavities in the connection and welding process of aluminum / titanium dissimilar materials, how to add ultrasound and how to realize the isochronism and stability of welding ultrasonic and TIG micro-melting brazing It is a difficult problem in TIG micro-melting brazing with welding ultrasonic vibration. We invented an efficient welding-with-welding ultrasonic-assisted loading method to solve the problems in the aluminum / titanium-with-welding ultrasonic welding process. Firstly, a spherical continuous vibration device is designed to solve the isochronism and stability of welding ultrasonic and TIG welding torches. Secondly, the coaxial movement of the welding ultrasonic and the TIG welding torch in the same direction makes the introduction of welding ultrasonic vibration into Al / Ti dissimilar metal TIG arc micro-melting brazing a reality. Thirdly, a set of semi-au...

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Abstract

The invention provides an ultrasonic welding method of Al/Ti dissimilar metal TIG electrical arc micro-melting brazing and following welding, wherein an isochronous and stable ultrasonic vibration system is added in the TIG micro-melting brazing process, and the simultaneous and equi-directional welding of TIG micro-melting brazing and following welding is realized through a spherical interlinking device. The method comprises the following steps of: enabling a welding gun tungsten electrode and a test piece to reach reasonable welding height by vertically adjusting the position of a welding gun; enabling a continuous vibration ball to cling to the surface of the test piece by vertically adjusting an ultrasonic transmitting device; measuring the distance d from the contact point of the continuous vibration ball and the surface of the test piece to a TIG welding gun tungsten electrode by horizontally adjusting an ultrasonic generating device to enable d to satisfy welding requirements; and reasonably matching an ultrasonic vibration device and a TIG welding gun by adjusting d, and adjusting the acting position of ultrasonic vibration by adjusting d. The invention has strong process applicability and good stability, realizes the semi-automatic welding of Al/Ti dissimilar metal connection, and has wider usability and good improving action for the welding joints of TIG micro-melting brazing for various dissimilar metals.

Description

(1) Technical field [0001] The invention relates to a welding technology, in particular to an ultrasonic welding method for TIG arc micro-melting brazing of Al / Ti dissimilar metals. (2) Background technology [0002] Aluminum and aluminum alloys, titanium and titanium alloys all have the advantages of low density, high specific strength (the strength of titanium alloys is close to that of medium-strength steel), good corrosion resistance and heat resistance (for titanium alloys), and the like. As a new type of material, composite components of alloys have been widely used in the field of aerospace, and its realization methods include arc fusion brazing, solid-state diffusion welding, vacuum brazing, liquid phase diffusion welding, laser joining, etc. [0003] The biggest impact on the application of Al / Ti dissimilar metal connection is the problem of mutual solubility and intermetallic compounds. The main conditions for obtaining welded joints of dissimilar metals are: they...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K9/23B23K9/235B23K9/32B23K9/02B23K9/167
Inventor 吕世雄黄永宪杨涛石经纬敬小军程晋笠曲杰
Owner HARBIN INST OF TECH
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