3D printing restrained forming auxiliary device and use method thereof

Abstract

The invention discloses a 3D printing restrained forming auxiliary device and a use method thereof. The 3D printing restrained forming auxiliary device comprises a fixing portion, a sliding rail and a cooling device. The fixing portion is fixedly connected with the sliding rail and is used for being fixedly connected with a welding torch of 3D printing equipment, and the cooling device is slidably connected to the sliding rail and is used for cooling deposited metal generated in the printing process of the 3D printing equipment. The majority of heat of the deposited metal generated in the electric arc 3D printing process is brought away through cooling of a cooling block, solidification and high-temperature stay time of molten pool metal is greatly shortened, and the problems that heat accumulation of accumulated parts is serious, the heat dissipation condition is poor, a molten pool is excessively hot, an internal grain organization is thick and big, and mechanical property is low along with increase of the number of accumulated layers are solved. Besides, the 3D printing restrained forming auxiliary device is simple in structure and convenient to use and adjust, the machining margin required for a current electric arc 3D printing workblank forming piece is eliminated or reduced, production efficiency of electric arc 3D printing is improved, and the material utilization rate is increased.

Description

technical field [0001] The invention relates to the field of arc 3D printing, in particular to a 3D printing constrained forming auxiliary device and a method for using the same. Background technique [0002] The electric arc 3D printing process uses an electric arc as a heat source to manufacture solid parts through the accumulation of high-temperature liquid metal layer by layer. Due to the high fluidity of the liquid molten pool metal, the forming accuracy of the side wall of the arc 3D printed part is low, and it often requires post-cutting processing to meet the required accuracy. In addition, as the number of stacked layers increases, limited by the overall heat dissipation capacity, the heat accumulation of the overall structure is serious, which will further affect the molding accuracy. At the same time, the extension of high temperature residence time will also coarsen the internal grain structure of the additive part (preform), reducing the overall mechanical prop...

AI Technical Summary

Problems solved by technology

Due to the high fluidity of liquid molten pool metal, the forming accuracy of the side wall of arc 3D printed parts is low, and it often requires post-processing to meet the required accuracy.

In addition, as the number of stacked layers increases, limited by the overall heat dissipation capacity, the heat accumulation of the overall structure is serious, which will further affect the molding accuracy

At the same time, the prolongation of the high temperature residence time will also cause the internal grain structure of the additive part (preform) to coarsen, reducing the overall mechanical properties of the part.

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