Additive manufacturing method and device for large metal part

Abstract

The invention belongs to the field of additive manufacturing, and specifically discloses an additive manufacturing method and device for a large metal part. Firstly, the additive manufacturing technology is used, slice processing is performed according to a data model of the part, then contour data of all layers are extracted, a deposition path of a contour is generated, a metal cavity having a certain thickness and depth is manufactured on a substrate, smelted metal is injected into the metal cavity, after the smelted metal is in the solidification or semi-solidification state, the part is rolled and processed, deposition of a new metal cavity in the part is continuously carried out, and the above steps are continuously executed until the overall part is completed. The additive manufacturing method and device solve the defects that a current large-scale metal part wholly adopts the additive manufacturing process so that the efficiency can be insufficient and cracking can be easy, thecasting process is adopted so that defects such as contraction and shrinkage can exist, the shortcoming that the process is complicated and the cycle is too long and the shortcoming that the forging process is adopted so that a forging press can have the tonnage limit and the cycle can be too long, and the high-performance metal parts can be quickly manufactured with low cost.

Description

technical field [0001] The invention belongs to the field of additive manufacturing, and more specifically relates to a method and device for additive manufacturing of large metal parts. Background technique [0002] At present, the manufacturing methods of large metal parts mainly include forging, casting, machining, etc., or use forging and casting processes to form parts in sections, and then use welding processes or mechanical connections to form whole parts. After years of development, casting technology and large-scale forging equipment at home and abroad have made great progress, and the processed metal parts have been continuously improved in terms of volume and quality. However, large parts are prone to defects such as porosity, shrinkage cavity, and inclusions during the casting process; when forging large parts, there are problems such as insufficient tonnage of forging presses, high mold processing costs, cumbersome manufacturing processes, and long processing cy...

AI Technical Summary

Problems solved by technology

[0007] For large-shaped metal parts, there are cumbersome procedures, long processing cycle, and difficulty in controlling metallurgical defects when using traditional casting technology. When forging is used, there are high tonnage requirements for forging presses, high mold manufacturing costs, long processing cycles and inability to manufacture. Due to the difficulties of complex metal components and the insufficient forming efficiency of the existing additive manufacturing technology, the present invention proposes a high-performance, high-efficiency composite additive manufacturing technology for large metal parts that combines additive manufacturing technology, casting technology and forging technology. The material manufacturing method and device can realize high-performance, high-efficiency, and low-cost manufacturing of large metal parts, and have the advantages of high forming efficiency and good forming quality.

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