Metal framework for casting metal and non-metal composite impeller and preparation method thereof

Abstract

The invention relates to the field of casting mold design, in particular to a metal framework for casting a metal and non-metal composite impeller and a preparation method thereof. The metal frameworkcomprises a bottom plate and an upper cover, wherein the bottom plate and the upper cover are connected through blades, and the blades extend from the inner side of the bottom plate to the outer sidein a vortex shape. The bottom plate is provided with a through hole which is positioned at 1/2 of the joint position of the adjacent blade and the bottom plate, the through hole arranged on the uppercover is positioned between the joint position of the adjacent blade and the upper cover, and the surface of the blade is also provided with the through hole. After the non-metal layer is poured, a net structure can be formed by means of the through holes to wrap the metal framework, so that the bonding effect is enhanced. The preparation method of the metal framework comprises the steps of designing the metal framework, manufacturing a wood former, pouring and heat treatment, surface polishing and machining, size detection, pouring impeller and impeller detection, and design correction. Saidmethod for casting the composite impeller by using the metal framework comprises the steps of metal framework surface treatment, nonmetal material preparation, vacuum hot casting, impeller heat treatment and machining, and impeller detection.

Description

technical field [0001] The invention relates to the field of casting mold design, and specifically includes a metal skeleton for metal and nonmetal composite impeller casting and a preparation method. Background technique [0002] At present, impellers on the market are divided into two categories in terms of materials, one is metal castings, and the other is non-metallic materials and metal impeller skeleton composites. At present, the metal skeleton structure design of non-metal material cast impellers in the market is simply to reduce the size of the finished impeller, and then wrap the metal impeller skeleton through non-metal material casting, and then meet the size design requirements of the finished impeller through machining. For the impeller manufactured by this method, the bonding strength between the metal skeleton and the surrounding non-metallic material layer is not enough, and the impeller will rotate at high speed when it is working, which will easily cause t...

AI Technical Summary

Problems solved by technology

Since the T-groove only exists on the surface of the fixing strip, it has a limited effect on strengthening the bonding between the plastic layer and the impeller, and it is impossible to avoid cracking, air bubbles, and falling off when casting the non-metallic material layer

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