A friction stir welding device for 2219 aluminum alloy sheet

Abstract

The invention discloses a friction stir welding device for 2219 aluminum alloy plates. The friction stir welding mechanism includes a friction stir welding head. When performing friction stir welding, the friction stir welding head can rotate at a high speed while slightly The up and down oscillation setting, and the amplitude of the slight oscillation is less than 15% of the welding thickness and greater than 5% of the welding thickness, so that the plastic metal at each position of the welding can be made to flow uniformly by using the slight oscillation, and , which can realize the automatic conveying and feeding of the profile, and can also realize the precise adjustment of the height position of the profile to ensure that the profile is welded at the correct matching position, ensure the reliability and stability of the welding position, and improve the quality of friction stir welding.

Description

technical field [0001] The invention specifically relates to the technical field of friction stir welding, in particular to a friction stir welding device for 2219 aluminum alloy plates. Background technique [0002] Since the temperature of friction stir welding is relatively low, the residual stress or deformation of the welded structure is much smaller than that of fusion welding. Therefore, friction stir welding is mainly used for non-ferrous metals with low melting temperature, such as Al, Cu, etc. alloy. In friction stir welding, a cylinder or other shaped stirring head is generally inserted into the joint of the workpiece. Through the high-speed rotation of the stirring head, it rubs against the material of the welded workpiece, thereby increasing the temperature of the material at the joint and softening it. At the same time, the material is subjected to friction stir to complete the welding. During the welding process, the workpiece should be rigidly fixed on the ...

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Problems solved by technology

[0003] However, in the current welding method, during the welding process of the stir welding head, since the position where the welding head is pressed down and extends into the weld seam is fixed, the friction effects of different parts in the weld seam are different, and Too much friction or frictional heat generation will make the welding joint too large, the welding thickness is too large, resulting in excessive deformation, and more energy consumption, the loss of the stir welding joint is large, and if the frictional force or frictional heat generation is too small, It is easy to make the metal flow uneven at the welding place, resulting in unreliable welding connection quality at the welding place, affecting the welding effect and quality

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