Error compensation method for rotary shafts of double-rotary-table five-shaft linkage machine tool

A five-axis linkage machine tool, error compensation technology, applied in manufacturing tools, other manufacturing equipment/tools, etc., can solve problems such as the position offset of the small ball at the spindle end

Active Publication Date: 2016-01-27
SHENYANG MACHINE TOOLGRP RES & DESIGN INST CO LTD SHANGHAI BRANCH
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Problems solved by technology

After compensating the A and C axes, the position of the ball at the spindle end will also shift under the influence of the RTCP function

Method used

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  • Error compensation method for rotary shafts of double-rotary-table five-shaft linkage machine tool
  • Error compensation method for rotary shafts of double-rotary-table five-shaft linkage machine tool
  • Error compensation method for rotary shafts of double-rotary-table five-shaft linkage machine tool

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Embodiment Construction

[0071] The present invention will be further described in detail below in conjunction with the accompanying drawings. The given embodiments are only used to illustrate specific implementation and beneficial effects, and are not intended to limit the protection scope of the present invention.

[0072] like figure 1 As shown, a method for error compensation of the rotary axis of a double turntable five-axis linkage machine tool, which includes the following steps:

[0073] (1) Set tool length and current coordinate system:

[0074] Use a tool setting instrument to measure the value of "knife handle length + length of small ball adsorption rod + standard small ball radius", set the length of T1 knife as this value, and use T1 knife when detecting errors.

[0075] According to the machine tool assembly relationship (RTCP parameter), set the X, Y, and Z values ​​of the current coordinate system (such as G58) to the values ​​of the C-axis rotation center in the A-axis coordinate sy...

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Abstract

The invention provides an error compensation method for rotary shafts of a double-rotary-table five-shaft linkage machine tool. The error compensation method comprises the following steps that the tool length and the current coordinate system are set; a measurement center base at the workbench end is installed, and an installation error is measured and calculated; a rotary shaft error model containing an installation error and machine tool assembly relation is established; 12 error values generated when the two rotary shafts rotate are calculated through the error model; compensation and decoupling of the errors of the rotary shafts and the linear shafts, and an error compensation value is corrected; and a numerical-control code is corrected according to the error compensation value, so that error compensation of the rotary shafts of the double-rotary-table five-shaft linkage machine tool is achieved. The error compensation method is high in universality, the precision of the error model is improved, and automatic and effect error detection of the five-shaft machine tool is achieved.

Description

technical field [0001] The invention relates to an error compensation method of a numerical control system of a numerical control machine tool, and more particularly relates to an error compensation method of a rotation axis of a double turntable five-axis linkage machine tool. Background technique [0002] The five-axis CNC machine tool has the ability to move and rotate the tool or workpiece at the same time, and can process free-form surfaces with complex geometric shapes and high precision requirements, which plays a major role in the current manufacturing industry, especially the military industry. At present, the measurement of the rotation axis error mainly adopts the indirect measurement by installing the standard rod and the standard ball. This method will introduce the contour error of the standard rod and the installation and centering error of the chuck, etc., and reduce the compensation effect of the rotation axis error. Renishaw has proposed the XR20-W wireless...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23Q23/00
Inventor 虞敏赵建华黄云鹰黄迪朱蓓夏斌刘宏威刘放陈阁张宏五
Owner SHENYANG MACHINE TOOLGRP RES & DESIGN INST CO LTD SHANGHAI BRANCH
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