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Double helix circumduction stirring friction free key hole spot welding method and device

A friction stir and spot welding device technology, which is applied in welding equipment, non-electric welding equipment, metal processing equipment, etc., can solve the problems of low shear strength and tensile strength, achieve high shear strength and tensile strength, and weld good quality effect

Inactive Publication Date: 2008-06-18
谢里阳
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AI Technical Summary

Problems solved by technology

[0005] Aiming at the shortcomings of friction spot welding without stirring effect in the prior art, keyholes are left on the surface after welding, and the shear strength and tensile strength of friction spot welding are very low; the invention provides a double-helix circular stirring friction spot without keyholes Welding method and device

Method used

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  • Double helix circumduction stirring friction free key hole spot welding method and device

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Embodiment Construction

[0026] The double-helix circular friction stir frictionless keyhole spot welding device of the present invention is shown in Figure 3. The device includes a machine tool vertical guide rail 1, a low-speed drive servo motor 2, an eccentric wheel 3, a telescopic drive servo motor 4, a telescopic mechanism 5, and a fixed frame 6. High-speed drive motor 7, main drive transmission mechanism 8, planetary gear train 9, stirring shaft 10, fixture head 11, and friction stirring tool head 12. Fixed mount 6 is installed on the vertical lifting guide rail 1 of lathe, and high-speed driving motor 7, low-speed drive servo motor 2, main drive transmission mechanism 8 and planetary gear train 9 are all installed on the fixed mount 6. The high-speed drive motor 7 is connected with the main drive transmission mechanism 8, the main drive transmission mechanism 8 is connected with the planetary gear train 9, the low-speed drive servo motor 2 is connected with the center shaft of the eccentric whee...

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Abstract

Disclosed is a spot welding method without spoon hole and a device for double spiral circumduction stirring friction. A fixed mount of the device is arranged on a vertical elevating guide rail of the machine tool; a high speed driving motor, a low speed driving motor, a main driving transmission mechanism and a planetary gear system are all arranged on the fixed mount; the high speed driving motor is connected with the main driving transmission mechanism which is connected with the planetary gear system; the low speed driving servo motor arranged on the fixed mount is connected with the central axis of the eccentric wheel which is equipped with a stirring shaft; the stirring shaft is connected with the flexing servo motor through a flexing mechanism; a clamp head is arranged below the stirring shaft whose bottom end is equipped with a stirring friction tool head; the centre of the stirring friction tool head is equipped with a flexible friction stirring pin; the planetary gear system shaft is connected with an eccentric wheel; using the device to carry out spot welding can has a relative large welding zone; the welding quality is good, the surface of the welding spot has no defect of spoon hole; the shear strength and the tensile strength of the welding spot is high.

Description

technical field [0001] The invention belongs to the field of welding technology, in particular to a method and device for double-helix circular friction-stirring and keyhole-free spot welding. Background technique [0002] Existing friction spot welding: see accompanying drawing 1, this method is to utilize the welding tool of round end surface band shaft shoulder, inserts to be welded by rotation, because frictional heat makes the material to be welded soften, thereby realizes friction welding; Welding tool shoulder The length of the thimble on the top is less than the thickness of the material to be welded; the diameter of the shoulder is 1.5 to 4.5 times the diameter of the thimble. This spot welding method has been used to weld thin sheet materials with low melting point and low hardness. [0003] Its shortcomings are: the area of ​​the welding point is small, the shear strength is not high, and the tensile strength is very low. After welding, there will be a keyhole in...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K20/12
Inventor 谢里阳张明川李兵王磊
Owner 谢里阳
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