Aluminum alloy arc auxiliary coating additive manufacturing (AM) system and method

Abstract

The invention discloses an aluminum alloy arc auxiliary coating additive manufacturing (AM) system and method. A crucible is fixed to a closed glove box. A three-dimensional mobile platform, a base plate and an arc heat source are all located in the closed glove box. The base plate is located on the three-dimensional mobile platform. The upper end of a coating head communicates with an outlet of the bottom of the crucible, and the lower end of the coating head is inserted into the closed glove box and directly faces the base plate. The arc heat source is fixed to the top of the closed glove box and directly faces the base plate. An induction coil is wound on the outer wall of the crucible and connected with a power supply. A crucible cap is arranged at an opening of the top of the crucible. A first gas supply system communicates with the closed glove box, and a second gas supply system communicates with the crucible. The output end of a controller is connected with the control end of the power supply. The first gas supply system and the second gas supply system are connected with the controller. By adoption of the aluminum alloy arc auxiliary coating AM system and method, a good-quality aluminum alloy workpiece can be prepared through 3D printing, and preparation is low in cost and high in efficiency.

Description

technical field [0001] The invention belongs to the technical field of 3D printing, and relates to an aluminum alloy arc-assisted coating additive manufacturing system and method. Background technique [0002] Additive manufacturing (additive manufacturing, AM) technology is a new type of manufacturing technology combined with manufacturing technology, information technology and new material technology in recent years. Due to its special molding method and broad application prospects, it is known as the " Representative technologies of the third industrial revolution. This technology does not require traditional processing tools, fixtures and multi-channel processing procedures. It has the advantages of good flexibility, fast forming speed, and the forming has nothing to do with the complexity of parts. Due to the particularity of its process, additive manufacturing can realize short-term manufacturing, and Promote the transformation of mass manufacturing mode to personaliz...

AI Technical Summary

Problems solved by technology

Among them, although electron beam melting has high energy density, high power and high forming efficiency, its formed parts have low precision and limited size.

Although 3D printing technology, 3D micro-welding technology and 3D printing technology have low equipment costs, the strength and precision of the formed parts are difficult to meet industrial applications.

[0005] Although aluminum alloys are widely used in the national economy, there are few researches on aluminum alloys in additive manufacturing technology.

First of all, aluminum alloy is very easy to oxidize in the air, and its oxidation product aluminum oxide has a very high melting point (about 20500C), which will cause gaps in the interlayer bonding in metal 3D printing. Secondly, aluminum alloy is very easy to produce in metal additive manufacturing. Pores, the main cause of pores is hydrogen. Since liquid aluminum can dissolve a large amount of hydrogen, solid aluminum can hardly dissolve hydrogen. During the solidification process, hydrogen has no time to escape, and pores will be generated in the formed part, resulting in aluminum alloys. The quality of the workpiece is poor. Third, the reflectivity of aluminum alloys to lasers is high, and the absorption rate of laser energy is very low, which leads to great obstacles in the research of aluminum alloys in the metal additive manufacturing technology that uses lasers as heat sources. Therefore, it is impossible to prepare aluminum alloy workpieces with better quality by 3D printing.

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