A core manufacturing method for a multi-cavity rotary structure

Abstract

The invention relates to a method for manufacturing a core of a multi-cavity rotating body structural component. The method sequentially comprises the following steps: (1) manufacturing and assembling spindles, wherein a spindle concave end and a spindle convex end are arranged at two ends of a spindle main rod; (2) turning over each spindle, and sequentially performing trial assembly on a sand core base; (3) manufacturing and assembling a core box, wherein the shape of the inner cavity of the core box is consistent with the shape of each rotating cavity; fixing the spindles in the center of a core box bottom plate, encircling the various tiles into a core box side plate, and fixing the core box side plate on the outer circumference of the core box bottom plate; (4) respectively manufacturing each sand core in the core box, placing secondary core bars layer by layer, overlapping primary core bars above the secondary core bars, and embedding the core bars into a core bar clamping grooves on the spindle main rod; (5) removing the core box side plate and the core box bottom plate, thereby obtaining each sand core; and (6) placing the sand box base onto a modeling platform for modeling the lower box, wholly turning the lower box, and sequentially assembling each sand core onto the sand core base. According to the method disclosed by the invention, the complex inner cavity structure of a large multi-section high-precision rotating body casting can be formed.

Description

technical field [0001] The invention relates to a method for manufacturing a core of a multi-cavity revolving body structure, and belongs to the technical field of metal casting. Background technique [0002] In the field of metal casting, structural parts with a diameter of more than 0.5m and a height of more than 1.5m are called large structural parts. For large multi-cavity revolving structural parts, the traditional manufacturing method is to segment the inner cavity according to the difficulty of manufacturing, then complete the casting and processing of each segment, and finally use the bolt connection scheme to realize the assembly of the overall structural part. In order to ensure sufficient strength of the bolted joint, the thickness of the connecting flange is generally a multiple of the wall thickness of the rotary body, resulting in a structural scheme that accommodates the process conditions and increases the weight of the parts. [0003] With the continuous up...

AI Technical Summary

Problems solved by technology

In addition, during the pouring and forming process of the casting, the bottom middle core is subjected to the axial gravity of the whole middle core, which produces outward stress and strain in the radial direction, which will seriously affect the radial yield of the bottom middle core, which is easy to cause The radial dimension of the relative position of the casting is out of tolerance or cracks

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