3D printing equipment for large parts

Abstract

The invention discloses 3D printing equipment for large parts. The 3D printing equipment for the large parts comprises a wire feeder, a morphology controller, a first computer, an arc welding gun, aninduction heating disc, an ultrasonic micro-forging mechanism, an amplitude-change pole, an infrared camera, a second computer, a base and a workbench. The 3D printing equipment has the beneficial effects that the stress deformation of the parts in the 3D printing process can be removed in time, excessive extra size allowance does not need to be added, so that the waste of materials and working hours is avoided, the production cost is saved, the production efficiency is improved, subsequent stress relief annealing does not need to be carried out, and therefore the super-huge type parts can beprinted.

Description

technical field [0001] The invention relates to the field of metal material processing, in particular to a device for 3D printing of large parts. Background technique [0002] The 3D printing process is based on the discrete-accumulation principle, driven by the three-dimensional data of the part, and adopts the method of accumulating materials layer by layer to manufacture the rapid prototyping technology of the solid part. This forming method is a highly integrated product digital design, manufacturing, and analysis, which can not only significantly shorten the research and development cycle and research and development costs, but also the more complex the structure and the higher the added value of raw materials, the more significant the advantages of rapid and efficient forming. 3D printing technology is currently used in mold manufacturing, industrial design, automobile, aerospace and medical industry, civil engineering, military and other fields, and will gradually rep...

AI Technical Summary

Problems solved by technology

[0008] (1) During 3D printing, the stress and deformation of the parts are large, and it is necessary to increase the extra margin size, resulting in a certain waste of materials and man-hours, increasing production costs, reducing production efficiency, and subsequent stress relief annealing is required. Large parts are limited by the size of the annealing furnace;

[0009] (2) For materials with different thermal conductivity, the printing effect of the parts has certain defects. The TC4 titanium alloy with low thermal conductivity is printed with a basket structure and a small amount of Widmanstatten burnt structure, copper alloy and aluminum alloy. When printing materials with high thermal conductivity, there are more micro-crack defects, and the forming effect is not ideal;

[0010] (3) Parts often have poor fusion after printing, and there are micro-cracks or pores inside. After non-destructive testing, there are many defects, which cannot meet the acceptance requirements;

[0011] (4) After the parts are annealed, the grains are coarse, and the diameter generally exceeds 100 microns, which is much larger than the grains of parts processed by traditional processes, and the mechanical properties and fatigue resistance are low.

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