Material-frame (integrated type) investment casting process and method

Abstract

The invention discloses a material-frame (integrated type) investment casting process and method, and relates to pressing design of an investment casting, arrangement of a gating system and a manufacturing process and a casting method for an investment casting. Clients claim that the investment casting is made of stainless steel, and material-frame sizes are length*width*height (870mm*855mm*558mm,the wall thickness is 8mm); five pieces of stainless steel investment castings are adopted, wherein the length*width*thickness of two pieces is 870mm*558mm*8mm, the length*width*thickness of two pieces is 855mm*558mm*8mm, and the length*width*thickness of one piece is 870mm*855mm*8mm; and totally five pieces of stainless steel investment castings are welded to a whole material-frame as shown in the abstract Figure 1. In the premise of reserving client technology and quality requirements, after a series of process safeguard measures, the material-frame (integrated type) investment casting process and method are invented successfully, namely the process and method include the steps that whole investment is performed, whole shell-making is performed, castings are cast, cleaning and test areperformed, and products are obtained. The technology and quality problems of deformation, cracks, and complex processes including correction, heat treatment and the like when the five investment castings are welded are avoided through an integrated type structure; the production efficiency is improved, and the quality requirements are guaranteed; and simultaneously, energy saving and cost reducingare achieved, and the process and method are completely in conformity with green casting.

Description

technical field [0001] This invention relates to a process and method for investment castings. technical background [0002] The production process of the raw material frame is: the material is stainless steel; the size of the material frame is length × width × height (870mm × 855mm × 558mm, the thickness of the wall is 8mm); the length × width × thickness (870mm × 558mm × 8mm-2 pieces, 855mm ×558mm×8mm-2 pieces, 870mm×855mm×8mm-1 piece); a total of 5 mesh stainless steel wax mold castings, and then welded into a whole - material frame. [0003] Problems: [0004] 1. The 5-piece mesh stainless steel casting is large and thin, easily deformed and cracked, and has a high scrap rate. [0005] 2. Welding 5 pieces of stainless steel sheets together is more likely to produce welding deformation and cracks, which again increases the scrap rate; and increases the post-welding grinding process. [0006] 3. The material frame after welding has different degrees of deformation and n...

AI Technical Summary

Problems solved by technology

[0006] 3. The material frame after welding has produced different degrees of deformation and needs to be corrected; this process is extremely difficult to implement in production

[0007] 4. In order to eliminate the welding stress, the material frame after welding must be heat treated; this process wastes a lot of energy and is difficult to implement, etc.

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