Quenching core mold and quenching method for cylindrical steel thin-walled parts

Abstract

A quenched core mold and quenching method for a cylindric steel thin-wall component are disclosed. The quenched core mold includes a mold body. The radial dimension of an external circular surface ofthe mold body is designed as an inner-pore radial dimension before drying of the component, thus ensuring that a heated inner hole expands and the component is put into the mold body successfully during component quenching heating, and ensuring that the component tightly clamps the mold body after quenching. The external circular surface of the mold body is provided with a plurality of axial through slots which are disposed axially, bidirectionally cut-through, and used for allowing quenching oil to flow through, preventing contraction crack of the component during quenching, and assisting component demolding. The plurality of the axial through slots are equally spaced along the periphery direction of the mold body to form a uniform saw-toothed external circular surface. Slot bottoms of the axial through slots corresponding to end surface wide edges of the component are provided with axially-through wide-edge cooling slots used for increasing the flux of the quenching oil to cool the end surface wide edges of the component. Inner hole and planarity deformation of the component is reduced during quenching to allow dimension deformation of the component to be controlled in a reasonable range.

Description

technical field [0001] The invention relates to the technical field of aero-engine parts processing, in particular to a quenching mandrel for cylindrical steel thin-walled parts. In addition, the present invention also relates to a quenching method of a cylindrical steel thin-walled part comprising the above-mentioned quenching mandrel for cylindrical steel thin-walled parts. Background technique [0002] A thin-walled part is a common part of an aero-engine, the material is structural steel, and the final heat treatment state is carburizing and quenching. The thickness of the part is about 4mm. After the inner hole is carburized and quenched, the size requires flatness ≤ 0.1mm and inner hole ellipticity ≤ 0.15mm. Due to the high requirements on the wall thickness of the parts, they are easily affected by external factors. In actual production, the ellipticity of the whole batch of parts after quenching is often out of tolerance, and the subsequent machining of the inner ho...

AI Technical Summary

Problems solved by technology

[0003] The invention provides a quenching mandrel and a quenching method for cylindrical iron and steel thin-walled parts, so as to solve the technical problem that the thin-walled parts are deformed after quenching and the parts are scrapped

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