Device and method for rectifying hollow thin-walled castings

Abstract

The invention discloses a device and method for rectifying hollow thin-walled castings. The device comprises a lead-in part, an inner cavity rectifying part, an outline rectifying and a receding part, wherein the lead-in part is of a conical structure, and the size of the conical structure is smaller than that of the conical hollow part of a casting to be rectified; the outline rectifying part is of a cylindrical structure and is in transitional connection with the lead-in part through the inner cavity rectifying part which is of a conical surface structure, and the diameter value of the outline rectifying part is larger than the maximum diameter value of the inner cavity rectifying part; the receding part for bearing applied stress is installed at the tail end of the outline rectifying part. A deformed thin wall can be rectified by being knocked with a tool, deformation of the thin wall is thoroughly eliminated through combined rectifying of a rectifying mold and the knocking tool, and the qualified rate is close to 100%; the annular thin wall has an orderly outline, excellent surface state and small surface stress; the rectifying period is short, and the batch rectifying consistency is quite excellent.

Description

technical field [0001] The invention belongs to the field of design and application of cast blank correction molds, and in particular relates to a correction device and a correction method for hollow thin-walled castings. Background technique [0002] With the rapid development of advanced engines, the requirements for parts are increasing. Hollow thin-walled castings greatly reduce the quality of castings, so more and more hollow thin-walled castings are used in the manufacture of aero-engines. Hollow thin-walled castings are formed by investment casting. In practical applications, thin-walled castings are prone to deformation, which affects the use of castings. The reason for the analysis of the deformation is the following two factors: one is that during the cooling and solidification process of the thin-walled casting after pouring, the casting thermal stress may be released unevenly and cause deformation; the other is that in the subsequent processing of the part, due t...

AI Technical Summary

Problems solved by technology

[0003] In order to meet the size requirements of hollow and thin-walled openings in the design drawings of hollow thin-walled castings, the traditional method is to directly use wooden hammers to manually correct along the periphery of the hollow and thin-walled openings. Although this method can solve the problem of deformation of the hollow and thin-walled openings of some castings, each The consistency of the batch is poor, the correction cycle time is long, the correction is easy to make the size of the circular hollow thin-walled mouth irregular and easy to damage the surface quality of the part, which does not match the design of the part

So far, there is no other effective correction method, the storage rate of the final parts using this method is less than 50%, and the problem of thin-wall deformation cannot be effectively solved

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