An experimental method for high-speed milling process of an integral hardened steel convex test piece and a convex test piece

Abstract

The invention discloses a high-speed milling process experiment method of an integral type quenched steel convex curved-surface test part and the convex curved-surface test part, and relates to a high-speed milling experiment method and a test part. In order to solve the problem that existing technological data and an existing design method cannot meet the requirement for efficiently machining a quenched steel mold, the integral type quenched steel convex curved-surface test part which is provided with a variant-curvature upper surface is designed and machined; a ball milling cutter is adopted to take cutter cutting paths in three different directions along the test part, and an experiment of cutting the upper surface of the integral type quenched steel convex curved-surface test part is carried out, so that the milling cutter vibration amplitude and the machining surface residual height data in the feeding direction of the milling cutter and the milling width direction are obtained; the influence of the curvature change of the quenched steel convex curved surface on the vibration of the milling cutter and the machined surface appearance is tested, and an integral type quenched steel convex curved-surface high-speed milling technological scheme is given out; and the test part is of an integral cuboid structure and is composed of a bottom boss and a middle to-be-cut area. According to the method, the requirement for efficiently machining a quenched steel mold is met.

Description

technical field [0001] The invention relates to a high-speed milling process experiment method for a convex curved test piece, in particular to an integral hardened steel convex curved test piece high-speed milling process experimental method and a convex curved test piece, belonging to the technical field of complex surface processing. Background technique [0002] Large-scale hardened steel molds are produced in one piece, with complex profiles, and the curvature distribution of the high-hardness machined surface is changeable. When using a ball end milling cutter to cut the convex surface of a hardened steel mold, the cutting impact caused by the change of the curvature of the processing surface makes the vibration of the milling cutter changeable, and the cutting contact relationship between the tool and the processing surface is in an unstable state, which leads to the deterioration of the surface morphology of the processing. The precision is low, and the service life ...

AI Technical Summary

Problems solved by technology

When using a ball end milling cutter to cut the convex surface of a hardened steel mold, the cutting impact caused by the change of the curvature of the processing surface makes the vibration of the milling cutter changeable, and the cutting contact relationship between the tool and the processing surface is in an unstable state, which leads to the deterioration of the surface morphology of the processing. Low precision, reduced service life and cutting efficiency of milling cutter

[0003] There are two existing testing methods for high-speed milling hardened steel convex milling cutter vibration and machined surface morphology: (1) The milling cutter vibration test is performed directly on a large hardened steel mold, which can easily cause mold surface damage and affect Die life; (2) The cutting experiment was carried out on a specimen with no curvature change on the machined surface and a single change in the machined surface curvature. The obtained cutting technology could not effectively control the vibration of the milling cutter caused by the change of the machined surface curvature; the existing high-speed milling Hardened steel mold milling cutter vibration and surface morphology test method does not reflect the vibration and surface morphology of the milling cutter when the high-speed ball end milling cutter cuts the hardened steel surface under the condition of variable curvature, high-speed milling hardened steel The surface quality and processing efficiency of the convex curved surface cannot be guaranteed, and cannot meet the requirements for efficient processing of large hardened steel molds

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