New process method for manufacturing mold capable of ensuring size accuracy of cast blade for large-scale water turbine

Abstract

The invention relates to a new process method for manufacturing a mold capable of ensuring the size accuracy of a cast blade for a large-scale water turbine. The method is characterized by comprising the following steps of: selecting materials; designing a technical scheme for manufacturing the mold; establishing a three-dimensional model for manufacturing the mold; manufacturing a mold blank; processing the mold; and detecting the mold. The process method of the invention is unique and solves the problem that a distorted-surface blade casting mold has low manufacturing efficiency and that the kind of casting mold manufactured by the traditional manual method cannot achieve the accuracy of a design size. The method solves the deformation problem of the mold per se and ensures the size accuracy of a blade-type mold through the research and application of a new material and a new method in a mold manufacturing process.

Description

technical field [0001] The invention relates to a new mold manufacturing process method capable of ensuring the dimensional accuracy of casting blades of large water turbines, in particular to a mold manufacturing process method capable of ensuring the dimensional accuracy of casting blades of large water turbines. Background technique [0002] Large (≥400MW) water turbine blade casting molds are entirely physical production of three-dimensional space models. There is no reference point or datum surface for measurement along the circumference of the mold, and due to the structural design of the blade itself, the mold manufacturing process and the use of the mold are very easy to deform, which affects the dimensional accuracy. Relying on traditional mold manufacturing techniques, methods and materials, the production cost is high and the quality is difficult to guarantee. This type of mold manufacturing process method of the patent application is still blank in China. At pr...

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to overcome the deficiencies of the prior art, to provide a blade casting mold with unique process method, high production efficiency and design precision meeting the casting standard, and to solve the problem through the research and application of new materials and new methods in the mold making process. The deformation problem of the mold itself, a new mold manufacturing method that can guarantee the dimensional accuracy of large-scale hydraulic turbine casting blades to ensure the dimensional accuracy of blade molds