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Novel transmission shaft and friction stir welding process thereof

A technology of friction stir welding and friction stir, which is applied in the field of vehicle engineering, can solve the problems that the coaxiality of the shaft fork and the shaft tube is not easy to guarantee, and the welding joint is weakened, so as to reduce the production cost and improve the performance index.

Inactive Publication Date: 2020-04-24
HUBEI UNIV OF AUTOMOTIVE TECH
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  • Description
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Problems solved by technology

[0005] The main technical problems to be solved by the present invention include: during the welding process of high-strength aluminum alloy, steel / aluminum dissimilar material new vehicle transmission shaft, it is easy to cause weakening of the welded joint, and it is not easy to guarantee the performance indicators such as the coaxiality of the shaft fork and the shaft tube

Method used

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  • Novel transmission shaft and friction stir welding process thereof
  • Novel transmission shaft and friction stir welding process thereof

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Embodiment

[0030] Concrete implementation steps of the present invention are as follows:

[0031] 1. Shaft fork structure design:

[0032] Such as figure 1 As shown, a new transmission shaft is welded by an aluminum alloy shaft fork (or steel shaft fork) 1 and an aluminum alloy shaft tube 2, and the welding process used is friction stir welding. The connecting end of the shaft fork 1 and the shaft tube 2 is designed with an overlapping step 3, and the outer circle of the shaft fork 1 adjacent to the overlapping step 3 is designed with a tangential small boss 4 (wherein the small boss 4 of the steel shaft fork is pre-set A guide groove 6) is provided, and the shaft tube 2 is sleeved on the overlapping step 3 of the shaft fork 1 .

[0033] 2. Friction stir welding process:

[0034] Such as figure 2 As shown, the shaft fork 1 and the shaft tube 2 are welded by an automatic friction stir welding machine, and the stirring needle 8 on the high-speed rotating stirring head 7 presses down t...

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Abstract

The invention discloses a novel transmission shaft and a friction stir welding process thereof. The novel transmission shaft comprises an aluminum alloy shaft fork (or a steel shaft fork) and an aluminum alloy shaft pipe, wherein the shaft fork and the shaft pipe are connected in a friction stir welding manner; and a lap step is arranged at the end, connected with the shaft pipe, of the shaft fork, the part, near the lap step, of the excircle of the shaft fork is provided with a small tangential boss, and the shaft pipe is arranged on the lap step of the shaft fork in a sleeving mode. In orderto realize the welding of the same type materials of the aluminum alloy shaft fork and the aluminum alloy shaft pipe or the welding of the different materials of the steel shaft fork and the aluminumalloy shaft pipe, the small boss for ending the friction stir welding process is designed on the shaft fork, so that the adverse effect, from friction stir welding ending pin holes, on the welding quality of the transmission shaft is avoided. The novel aluminum alloy (or steel / aluminum) transmission shaft which is high in connection strength, high in coaxiality, stable in quality, and large in diameter-to-thickness ratio and the friction stir welding process thereof are suitable for the market requirements of vehicle lightening and cost reducing.

Description

technical field [0001] The invention belongs to the technical field of vehicle engineering, relates to a transmission shaft and a manufacturing process thereof, in particular to a novel transmission shaft and a friction stir welding process thereof. Background technique [0002] In order to meet the technical requirements of lightweight vehicles, some new materials and new structures have been widely developed and applied to new vehicles. The transmission shaft is a key component in the vehicle chassis. The traditional vehicle transmission shaft is welded by steel shaft forks and steel shaft tubes. In order to achieve the purpose of reducing the weight of the chassis, the development of aluminum alloy transmission shafts and steel / aluminum dissimilar material transmission shafts has become very urgent. [0003] At present, an aluminum alloy transmission shaft based on rotational friction welding has been developed. The quality of the weld seam of this transmission shaft is ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16C3/02B23K20/12
CPCF16C3/023B23K20/12F16C2326/06
Inventor 孙建新奚建胜李志强王金凤李聪周博芳
Owner HUBEI UNIV OF AUTOMOTIVE TECH
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