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Stirring head for friction stir welding

A friction stir and stirring head technology, which is applied in the field of component welding and rail transit friction stir welding products, can solve the problems of decreased mechanical properties, large heat generation, slow welding speed, etc. The effect of reducing production and maintenance costs

Pending Publication Date: 2021-08-27
ZHUZHOU ELECTRIC LOCOMOTIVE CO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For thick plate FSW, there are more materials affected by stirring at the same time, the welding speed is slower, and the heat generation is large. If the material flows too fast, it is easy to cause excessive heat in the weld area and significantly reduce the mechanical properties.

Method used

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  • Stirring head for friction stir welding
  • Stirring head for friction stir welding
  • Stirring head for friction stir welding

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Embodiment Construction

[0038] The present invention will be described in further detail below in conjunction with the accompanying drawings.

[0039] see Figure 1-Figure 7, a stirring head for friction stir welding, including a clamping part 1 and a stirring pin 2, the clamping part 1 is a cylindrical structure, when the stirring head is used, the clamping part is clamped by welding equipment, and the clamping part 1 includes The central through hole 1.1 and the lateral screw hole 1.2, the central through hole 1.1 extends along the axial direction (axis) of the clamping part 1, the axial direction of the lateral screw hole 1.2 is perpendicular to the axial direction of the central through hole 1.1; the stirring needle 2 One part is located in the central through hole 1.1, the other part (tapered tip) protrudes outside the clamping part 1, and the first fastener 3 in the side screw hole 1.2 pushes against the stirring needle 2 to push a part of the stirring needle 2 It is fixed in the central throu...

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Abstract

The invention discloses a stirring head for friction stir welding. The stirring head comprises a clamping part (1) and a stirring needle (2), and is characterized in that the stirring needle (2) comprises a conical tip part (2.1) protruding out of the clamping part (1), the outer surface of the conical tip part (2.1) comprises a conical surface (2.2) and an inclined plane (2.3) which are arranged at an interval along the circumferential direction, and threads surrounding the axis of the conical tip part (2.1) are arranged on the conical surface (2.2); and the end face, facing the conical tip part (2.1), of the clamping part (1) is a concave conical face (1.3). When the stirring head is used for welding a 17 mm thick aluminum alloy plate sleeper beam, the welding speed can reach 500 mm / min, and compared with the welding speed of about 150-300 mm / min of an existing conventional stirring head, the welding speed is improved by one time; and meanwhile, the weld mechanical property is remarkably improved.

Description

technical field [0001] The invention relates to a stirring head for friction stir welding, especially suitable for rail transit friction stir welding products, such as car body bolsters, coupler plates and other parts whose welding joint thickness exceeds 12mm. Background technique [0002] In the rail transit industry, friction stir welding (hereinafter referred to as FSW) has great advantages in terms of welded joint defect rate, manufacturing cost, deformation control, worker skill level, and environmental temperature and humidity requirements. Therefore, the adoption of FSW technology in the manufacture of high-speed aluminum alloy trains has become the mainstream trend. [0003] With the continuous development of technology, the friction welding process has been widely used in the welding of thin plate parts such as train side wall panels, air conditioning panels, and long floors. For the welding of thick-plate car body parts such as coupler plates and corbels, the app...

Claims

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Application Information

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IPC IPC(8): B23K20/12
CPCB23K20/1255
Inventor 孟腾逸吴坚定侍光磊胡丰吴志明
Owner ZHUZHOU ELECTRIC LOCOMOTIVE CO