Processing error calculating device, a processing error calculation method, processing control device and a processing control method

摘要

PROBLEM TO BE SOLVED: To provide a machining error computation device capable of computing the machining error precisely by means of analysis.;SOLUTION: The machining error computation device includes: a cutting force computation unit 32 for computing the cutting force Fy of a rotary tool 5 when the cutting force Fy generated in the rotary tool 5 is varied in conjunction with the intermittent cutting; a tool center displacement computation unit 42 for computing the displacement Ya of the rotational center C of the rotary tool 5 based on the cutting force Fy; a post-machining shape computing unit 24 for computing the post-machining shape of a workpiece W based on the displacement Ya of the rotational center C of the rotary tool 5; and a machining error computation unit 61 for computing the machining error of the workpiece W based on the difference between the post-machining shape of the workpiece W and the target shape of the workpiece W. The cutting force computation unit 32 feeds back the displacement Ya of the rotational center C of the rotary tool 5 computed by the tool center displacement computation unit 42, and calculates the next cutting force Fy based on the past displacement Ya of the rotational center C of the rotary tool 5.;COPYRIGHT: (C)2013,JPO&INPIT