Nozzle-coaxial self-selection multi-hot wire plasma arc metal composite additive method and device

Abstract

The invention discloses a nozzle-coaxial self-selection multi-hot wire plasma arc metal composite additive method and device. The additive device comprises a nozzle-coaxial self-selection multi-hot wire welding gun, a welding power supply, a wire feeding mechanism, a hot wire power supply, a water circulation coordination control device, a hot wire power supply coordination control device, a wirecoordination control device and a robot. When the additive device carries out plasma robot arc additive manufacturing, multi-component intermetallic compounds can be directly produced when wires withdifferent materials are adopted, the components of the intermetallic compounds can be adjusted according to the proportion, and an intermetallic compound structural part can be directly produced through arc additive manufacturing; and when wires with the same material are adopted for additive manufacturing, compared with a mode that a single-cold-wire plasma arc is adopted for additive manufacturing according to the tradition, the deposition efficiency can be improved by 5.0-6.0 times, the additive method is a high-efficiency, multi-component and low-cost composite metal material additive mode.

Description

technical field [0001] The invention belongs to the technical field of arc additive manufacturing, and relates to a nozzle coaxial self-selecting multi-heat wire plasma arc metal composite additive method and device Background technique [0002] Different from the previous "subtraction" processing mode, the additive manufacturing technology based on "addition" has the unique advantages of saving resources and low cost in the manufacture of complex parts, and is widely used in aerospace, national defense, rail transportation and other fields. application. With the development of the industry, the processing speed requirements for precision instruments and parts are getting higher and higher. [0003] Plasma arc additive manufacturing uses plasma arc as the heat source, metal wire as the filling material, and accumulates layers according to the set trajectory to form components with preset shapes. It has the advantages of simple equipment, low cost, high forming precision, an...

AI Technical Summary

Problems solved by technology

However, this kind of device only melts a wire, and the efficiency of wire melting is limited, and there is little room for alternative solutions, and the bypass hot wire process is likely to cause unstable plasma arc, making it difficult to achieve continuous surfacing

If it is necessary to realize the components of two or more component metal components at the same time, none of the devices mentioned in these patents can be realized. It is also considered to increase the number of wires on the basis of the existing single wire or double wire device, but either external clamps Too many, space accessibility is greatly reduced, and many components cannot be completed; or the equipment is too complicated to realize

Images