Shape modeling method of elliptical vibration assisted cutting microgroove

Abstract

The invention discloses an ultrasound oval vibration auxiliary turning micro-groove feature modeling method and belongs to the field of numerical control machining. The method comprises the steps that a machine tool machining coordinate system, a workpiece coordinate system, a tool coordinate system and a local coordinate system for oval vibration auxiliary cutting are established; a turning tool point circular curve equation and a tool ultrasound oval vibration cutting track equation are established with the surface of a machined workpiece as a criterion according to machining parameters and oval vibration parameters in the direction perpendicular to the cutting direction; the turning tool point circular curve equation and the tool ultrasound oval vibration cutting track equation are converted into the workpiece coordinate system; in the workpiece coordinate system, a turning tool point circular curve sweeps along the converted ultrasound oval vibration cutting tracks to form a spatial tool point vibration curved face; the tool point vibration curved face between adjacent oval vibration track intersecting lines is reserved by calculating intersecting lines between the adjacent oval vibration tracks so that micro-groove surface feature of the surface of a workpiece can be formed. The ultrasound oval vibration auxiliary turning micro-groove feature modeling method can solve the problem of oval vibration auxiliary cutting micro-groove surface feature generation.

Description

technical field [0001] The invention belongs to the field of numerical control machining, in particular to the field of micro-groove surface modeling caused by high-frequency vibration of a tool in ultrasonic elliptical vibration turning. Background technique [0002] With the rapid development of precision and ultra-precision machining technology, elliptical vibration cutting has been widely concerned because of its advantages of reducing cutting force, improving machining quality, suppressing workpiece burrs, and increasing tool life. In view of the higher and higher requirements for the processing quality of high-precision parts, scholars have designed a variety of elliptical vibration cutting methods and supporting vibration cutting devices to further improve the surface quality of elliptical vibration cutting. During the elliptical vibration cutting process, the vibratory cutting vibration of the tool produces a continuous overlapping elliptical trajectory relative to t...

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Problems solved by technology

At present, the research of scholars rarely involves the mathematical modeling and analysis of the surface of the workpiece, and the modeling and simulation before the actual vibration cutting experiment has an important reference and guiding significance for the whole experiment.

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