Friction stir welding additive manufacturing device and method capable of continuously feeding rods

Abstract

The invention discloses a friction stir welding additive manufacturing device and method capable of continuously feeding rods. Comprising a welding mechanism, a first feeding mechanism, a second feeding mechanism and a feeding mechanism, wherein the welding mechanism is used for stirring and rubbing an additive position and guiding a bar to axially move towards the additive position; the first feeding mechanism is used for driving the bar to axially move towards the additive position; the second feeding mechanism is used for driving the bar to axially move towards the additive position; the second feeding mechanism is arranged between the welding mechanism and the first feeding mechanism and located on the side of a bar moving in the axial direction, and the feeding mechanism is arranged between the first feeding mechanism and the second feeding mechanism and located on the side of the bar moving in the axial direction. The first feeding mechanism and the second feeding mechanism alternately drive the multiple bars to continuously move towards the material adding position. Automatic continuous feeding of the bars is achieved, and the device does not need to be stopped in the material adding process.

Description

technical field [0001] The invention belongs to the field of welding technology, and in particular relates to a friction stir welding additive manufacturing device and method capable of continuously feeding rods. Background technique [0002] The information disclosed in this background section is only intended to enhance the understanding of the general background of the present invention, and should not be considered as an acknowledgment or any form of suggestion that the information constitutes the prior art that is already known to those skilled in the art. [0003] At present, metal additive manufacturing (3D printing) mostly adopts fusion welding method, that is, laser, arc, electron beam, etc. are used as heat sources. The working temperature is higher than the melting point of the material, and the base material is melted. Performance of 3D printed parts. Friction stir welding is a technology that utilizes the frictional heat generation and stirring action between t...

AI Technical Summary

Problems solved by technology

At present, the feeding modes of friction stir welding additive manufacturing (Fictionstir additive manufacturing, FSAM) include plates, rods, wires, powders and granules, etc. Among them, the FSAM device with plates as the feed is the simplest, and the ordinary friction stir welding The device can be realized, but the shape of the printed part is greatly limited; the tooling is complicated, and the plate needs to be milled flat and retooled after each layer of welding is completed, wasting a lot of time

FSAM with powder as the feed material can configure metal powder from the source to obtain materials of any composition, but the price of raw materials is high, the requirements for powder particle size are high, the outlet is easy to block and the powder is easy to splash during the welding process, and there is a certain amount of dust explosion hazard

FSAM with wire as feed can realize continuous feeding of raw materials, but compared with rods, the rigidity of wire is poor, and it is easy to squeeze out the shoulder of the mixing head; in addition, the diameter of wire is small, and the additive When the efficiency is low and the additive width is large, the requirement for wire feeding speed is higher

The raw material cost of FSAM with bar as the feed is low and the efficiency is high, but the biggest problem is that the feeding process is discontinuous

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