Additive manufacturing method of aluminum alloy annular part by laser-TIG composite heat source

Abstract

The invention provides an additive manufacturing method of an aluminum alloy annular part by a laser-TIG composite heat source, and belongs to the field of additive manufacturing. According to the method, laser beams and a TIG electric arc are carried out additive manufacturing in a paraxial compositing manner, a welding wire is filled into an action area of the composite heat source by adopting apreposed wire feeding mode, the energy of the composite heat source is used for melting the welding wire, so that the structure of the aluminum alloy component is compact, and the quality is better.In the forming process, the movement track of a steering table and the offset of a workbench are controlled, annular welding beads from outside to inside are in lap joint with each other to form an aluminum alloy annular part. According to the method, the advantages of laser and electric arc additive manufacturing are combined, the single laser forming is improved, and ., and the defect that the forming quality is poor due to cracks easy to generated and large arc heat input through single laser forming is overcome, and the preparation method of an annular part with low defects, low cost and high performance is provided.

Description

technical field [0001] The invention belongs to the field of additive manufacturing and relates to a laser-TIG arc composite heat source additive manufacturing method for an aluminum alloy ring. Background technique [0002] At present, casting forming and machining methods are mainly used for aluminum alloy ring-shaped thin-walled components. Although these two methods can meet the processing accuracy requirements, they have disadvantages such as low material utilization rate, complicated processing procedures, long processing cycle time, and high production costs. Additive manufacturing technology can use the three-dimensional model to directly form complex-shaped structures, which can effectively shorten the processing cycle and improve product quality. [0003] Laser-TIG composite heat source additive manufacturing technology is a high-quality method that combines high-energy laser and highly adaptable non-melting arc welding (TIG). On the one hand, under the action of ...

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Problems solved by technology

[0004] Chinese patent CN108393587A discloses a laser-TIG composite additive manufacturing method, which realizes the additive manufacturing of aluminum alloy thin-walled parts, but this method is not suitable for the forming of ring components

[0005] Chinese patent CN 108161229 A discloses a method for manufacturing a solid aluminum alloy structure with wire-filled additives. The adjustment steps in the forming process of this method are cumbersome and the efficiency is low

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