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Double-moving ring friction spot welding method

A friction point and moving ring technology, applied in welding equipment, non-electric welding equipment, metal processing equipment, etc., can solve problems such as low interface temperature, virtual connection, and poor forming conditions of the connection surface, and achieve high-quality connection and quality consistency Good, the effect of improving the tensile and shear strength of solder joints

Inactive Publication Date: 2011-06-15
SHANGHAI AEROSPACE EQUIP MFG GENERAL FACTORY
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AI Technical Summary

Problems solved by technology

[0004] During the spot welding process, when the collar of the spot welding tool is pressed down, a new interface is formed on the side wall of the outer ring of the joint, and this interface is connected with the thermoplastic material extruded and flowed here to form a new connection surface in the subsequent stage. However, because it is located at the outermost ring of the joint, the interface temperature is relatively low, so the forming conditions of the new joint surface are harsh, and if the process parameters are improper, it will cause a virtual connection.
Therefore, although this friction spot welding method can be used to weld aluminum alloys to achieve a better connection than resistance welding, due to the inherent characteristics of this welding method, the weak point of the solder joint is transferred from the interlayer connection surface during resistance spot welding to the above-mentioned on the new connection surface of

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Embodiment Construction

[0017] Such as Figure 1 to Figure 5 As shown, the double moving ring friction spot welding method provided by the preferred embodiment of the present invention includes the following steps:

[0018] 1) Friction heating stage: the outer ring 13 presses the surface of the workpiece to constrain the mold, the middle ring 12 and the central shaft 11 press and rotate against the surface of the workpiece, frictionally heats the part of the workpiece to be welded, and softens the metal material plastically;

[0019] 2) In-situ mixing stage: the middle collar 12 is extruded and rotated to press into the material, while the central shaft 11 rotates and rises, and the plastic material flows to the central shaft area;

[0020] The above two stages are the same as the traditional friction spot welding process. The outer ring sleeve 13 does not need to be rotated and pressed down. When the middle ring sleeve 12 reaches the position where the welding depth is set, the outer ring sleeve star...

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Abstract

The invention discloses a novel solid phase spot connecting technique, in particular a double-moving ring friction spot welding method. The invention aims to solve the problem that the conventional friction spot welding head has a weak connecting face. The method disclosed by the invention strengthens the intrinsic weak face of the conventional friction spot welding head by means of changing the conventional external sleeve ring into the rotary moving rings and performing a down pressing action, and therefore realizes consistent high-quality connection of all parts of a solid phase sport joint.

Description

technical field [0001] The invention belongs to the field of welding, and in particular relates to a double-moving ring friction spot welding method. Background technique [0002] Chinese patent CN101053923A disclosed a friction stir spot welding technology on October 17, 2007 using a stirrer, which is processed from both sides by friction stir spot welding; the welding part mainly includes four parts, namely the upper and lower stirrers and the upper , lower shoulder; the frictional heat and plastic deformation of the double-sided friction stir spot welding process are generated from the upper and lower sides; there are free-rotating shoulders around the upper and lower stirring heads of the double-sided friction stir spot welding technology. The rotation can supplement the lack of heat production of the stirring head in the process of double-sided friction stir spot welding; it is because of these differences that not only the indentation pit and extrusion of the welding s...

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Application Information

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IPC IPC(8): B23K20/12
Inventor 姚君山徐萌乔凤斌贾洪德
Owner SHANGHAI AEROSPACE EQUIP MFG GENERAL FACTORY
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