Numerical control machine tool and numerical control device

Abstract

The invention relates to a numerical control machine tool which is provided with a straight line feed shaft and a swiveling feed shaft and can locate the straight line feed shaft and the swiveling feed shaft in advance in a specified position and posture so as to measure the relative position and the error of the relative gesture between a principal axis and an operating platform; correcting move instructions according to the measured error data; the numerical control machine tool is provided with an error data storing device and a corrected data calculating device, wherein the error data comprises multi-dimensional data of positional errors and gesture errors; the error data storing device stores an error setting table which is made by collecting a plurality of the error datum corresponding to the position and the rotation angle of the straight line feed shaft and the swiveling feed shaft; the corrected data calculating device figures out the corrected data of the moving instructions before correction according to the instruction position corresponding to the straight line feed shaft and the swiveling feed shaft and the error data stored in the error data storing device.

Description

[0001] This application is titled "Error Map Generation Method and Device, and Numerically Controlled Machine Tool with Error Map Generation Function", the international filing date is November 2, 2007, the international application number is PCT / JP2007 / 071750, and the national A divisional application of the invention patent application with application number 200780101401.4. technical field [0002] The invention relates to a numerical control machine tool (numerical control machine tool) and a numerical control device. The main shaft and the worktable of the numerical control machine tool can move relatively, and at the same time, it has a linear feed axis and a rotary feed axis. Background technique [0003] Generally, in a machine tool having a linear feed axis and a rotary feed axis, it is difficult to position a tool at a desired position because an error occurs when the feed axis is moved according to a movement command. Therefore, when performing high-precision mach...

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Problems solved by technology

[0008] The correction methods disclosed in Japanese Patent Publication No. 6-88192 and Japanese Unexamined Publication No. 2004-272887 are methods for correcting the axis deviation of the rotating shaft, and there is a problem that the position of the shaft cannot be corrected due to the bending of the shaft itself or the linear feed axis. Changes caused by errors and other issues

The error map disclosed in Japanese Patent Laid-Open No. 9-237112 uses the error at the front end of the tool unit driven by the parallel link mechanism as the table data, which has the problem that it cannot be applied to machine tools with linear feed axes and rotary feed axes.

In the measurement method disclosed in International Publication No. 2004 / 034164, since only the deviation of the center position of the reference ball is measured, there is a problem that the relative posture of the spindle and the table cannot be corrected when the tool length or tool protrusion length changes. The problem of the position offset of the tool front end caused by the error

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