Investment casting mold shell and splicing method thereof

Abstract

The invention provides an investment casting mold shell and a splicing method thereof, and relates to the field of casting methods, the investment casting mold shell comprises a concave splicing piece, a convex splicing piece, a concave positioning template, a convex mold shell, a convex positioning template and a concave mold shell, and the concave positioning template is connected to the splicing surface of the concave splicing piece to manufacture the convex mold shell; and the convex positioning template is connected to the splicing surface of the convex splicing piece to support a concave mold shell, and the convex mold shell and the concave mold shell are connected in a positioning manner. The mold shells are manufactured in a segmented mode, then the mold shells are used for casting parts, the differences of microstructures and mechanical properties of all parts of the casting are small, and the quality of the casting can be remarkably improved; the method is simple and reasonable, the follow-up tailor-welding procedure is not needed, and residual stress and size deformation generated by welding of the casting are eliminated; the product manufacturing period is obviously shortened; the application range is expanded and the casting size precision is improved.

Description

technical field [0001] The invention relates to the field of casting methods, in particular, to an investment casting mold shell and a splicing method thereof. Background technique [0002] In the existing casting methods for large-scale castings, generally segmented castings are first obtained and then integral parts are obtained by welding. This method has the following disadvantages: 1. For parts with complex structures, the original casting method is complex, the subsequent necessary tailor-welding processes are many, and the product manufacturing cycle is long; 2. The original casting method uses segmented casting of large parts , it is easy to cause great differences in the microstructure and mechanical properties of each segment of the casting, which is not conducive to the quality control of the casting; 3. The original casting method must be followed by tailor welding to obtain the whole part, the residual stress and dimensional deformation at the weld. , it is eas...

AI Technical Summary

Problems solved by technology

This method has the following disadvantages: 1. For parts with complex structures, the original casting method is complicated, there are more tailor-made welding processes necessary in the follow-up, and the product manufacturing cycle is long; 2. The original casting method adopts segmental casting of large parts , it is easy to cause large differences in the microstructure and mechanical properties of each segment of the casting, which is not conducive to the quality control of the casting; 3. The original casting method must be followed by tailor welding to obtain the whole part, the residual stress and dimensional deformation of the weld , it is easy to cause poor dimensional accuracy of large castings, and even lead to scrapping of castings

However, the present invention provides an investment casting mold shell and its splicing method, which solves the problems of complex casting methods, many follow-up processes, and poor dimensional accuracy.

Images