Wear-free thick laminated plate stirring friction brazing method adopting wide-shoulder tool with thick needle

A technology of friction stir and brazing method, applied in manufacturing tools, welding equipment, welding equipment and other directions, can solve the problems of poor oxide film removal effect, insufficient mechanical effect effect, insufficient thermal-mechanical effect effect, etc.

Inactive Publication Date: 2015-01-28
XI AN JIAOTONG UNIV
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Problems solved by technology

[0011] In order to solve the problem that the thermal-mechanical effect of the welding interface is insufficient with the attenuation of the plate thickness (especially the insufficient mechanical effect) when the thick clad plate is brazed by the needle-free tool-type friction stir brazing method, resulting in poor oxide film removal effect

Method used

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  • Wear-free thick laminated plate stirring friction brazing method adopting wide-shoulder tool with thick needle
  • Wear-free thick laminated plate stirring friction brazing method adopting wide-shoulder tool with thick needle
  • Wear-free thick laminated plate stirring friction brazing method adopting wide-shoulder tool with thick needle

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Embodiment

[0039] 1. Base metal and welding method

[0040] see figure 1 , The welding base material is pure aluminum plate (upper plate) with a thickness of 14mm and 304 stainless steel plate (lower plate) with a thickness of 2mm, and the solder is pure zinc foil with a thickness of 0.1mm. Before welding, polish the surface of the pure aluminum plate, stainless steel plate to be welded and both sides of the zinc foil with No. 240 sandpaper to remove the surface oxide film, and then wipe it with absolute ethanol. Pre-place the zinc foil between the two plates and perform welding. When welding, the needle tool is pressed into the pure aluminum plate, and the pressing depth is controlled at a distance of about 1mm between the stirring needle and the lower stainless steel base material, without contact with the stainless steel plate, and the inclination angle of the stirring head is 2o. After the stirring head is completely pressed into the aluminum base metal, it is preheated for about 1...

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Abstract

The invention provides a wear-free thick laminated plate friction stir brazing method adopting a wide-shoulder tool with a thick needle. According to the method, the tool with the needle is adopted for enhancing the heat-force action effect of the bottom of a laminated plate and the surface of a base plate; the wear of the high-strength base plate on a needle end is removed by enabling the needle end to approach a welding interface but not penetrate through the welding interface, the thick laminated plate and the base plate can be welded at one time mainly by the deformation heat and friction heat generated at the bottom of the thick needle, the friction heat generated on the shoulder, the extrusion and torsion effects on the welding interface and the metallurgical effect of brazing materials under the circumstance that the wear of the needle end is removed, the welding size can reach the diameter of the needle end, and the efficiency is improved.

Description

technical field [0001] The invention relates to a friction-stir brazing method for wear-free thick cladding plates using a wide-shoulder belt and thick-needle tool. Background technique [0002] At present, bimetallic composite panels are mainly prepared by explosive welding method and hot rolling method. The hot rolling method has the disadvantages of energy consumption and time-consuming. Although the explosive welding method is suitable for the preparation of large thickness and large area bimetal composite panels, it is not suitable for the preparation of thin, narrow and small composite panels. The needle-free tool-type friction stir brazing method [1-4] developed by the applicant in the early stage is just suitable for the preparation of thin, narrow and small composite plates, and has become an important supplementary process for explosive welding. The needleless tool-type friction stir brazing method mainly utilizes the thermal-mechanical joint action of the rotati...

Claims

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Application Information

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IPC IPC(8): B23K28/02B23K20/12B23K1/00
CPCB23K1/00B23K20/122B23K28/02
Inventor 张贵锋陈博张林杰牛靖张建勋
Owner XI AN JIAOTONG UNIV
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