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LaserTRACER-based method for detecting and identifying geometrical errors of translational shafts of numerical control machine tool

A geometric error, CNC machine tool technology, applied in measuring/indicating equipment, metal processing mechanical parts, metal processing equipment, etc., can solve problems that have not yet been found, and achieve the effect of rapid calibration and good identification effect

Inactive Publication Date: 2016-11-23
TIANJIN UNIV
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  • Claims
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Problems solved by technology

However, there is no application of LaserTRACER for polynomial description of the error identification of the geometric error of the translational axis of the CNC machine tool with the change of the position coordinates.

Method used

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  • LaserTRACER-based method for detecting and identifying geometrical errors of translational shafts of numerical control machine tool
  • LaserTRACER-based method for detecting and identifying geometrical errors of translational shafts of numerical control machine tool
  • LaserTRACER-based method for detecting and identifying geometrical errors of translational shafts of numerical control machine tool

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Embodiment Construction

[0023] The present invention will be described in further detail below in conjunction with the accompanying drawings and embodiments.

[0024] like figure 1 As shown, the LaserTRACER-based CNC machine tool translational axis geometric error detection and identification method provided by the present invention includes the following steps in order:

[0025] 1) Construct a measurement system composed of CNC machine tools and LaserTRACER, and use the measurement system to measure the end pose error of the machine tool;

[0026] like figure 2 As shown, in the measurement system, the CNC machine tool mainly includes a bed 1, a column 3, an X guide rail 4, a Y guide rail, a Y slide table 5, a Z guide rail, a Z slide table 6, and a spindle 7; The upper end surface is the workbench 2, and the X guide rail 4 is installed in the X-axis (front and back) direction on both sides of the bed 1, and the inner side of the lower end of the door-shaped column 3 forms a moving pair with the X ...

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Abstract

The invention discloses a LaserTRACER-based method for detecting and identifying geometrical errors of translational shafts of a numerical control machine tool. The geometrical error detecting and identifying method comprises the following steps of: constructing a measuring system consisting of the numerical control machine tool and LaserTRACER, and measuring by utilizing the measuring system to obtain machine tool tail end pose errors; establishing a mapping model between 21 geometrical errors of the numerical control machine tool and the abovementioned machine tool tail end pose errors; establishing a mapping model between the machine tool tail end pose errors and multinomial coefficient vectors of the 21 geometrical errors; establishing an identification equation set of the abovementioned multinomial coefficient vectors; carrying out identifiability analysis on the identification equation set of the multinomial coefficient vectors p; and carrying out simulating optimization on a measurement trajectory in a working space by use of Matlab, and the like. On the premise of measuring a relatively small amount of data, a relatively good identification effect is achieved, and data support is provided for machining capability evaluation and error compensation of the numerical control machine tool.

Description

technical field [0001] The invention belongs to the technical field of precise measurement and identification of geometric errors of numerical control machine tools, and in particular relates to a method for detecting and identification of geometric errors of translation axes of numerical control machine tools based on LaserTRACER. Background technique [0002] Error compensation is an effective means to improve the geometric accuracy of CNC machine tools, and the error detection and identification of the three translational axes of CNC machine tools is the most basic part of error compensation. At present, there are two types of error detection methods that are most widely used in CNC machine tools: one is the direct measurement method of single error based on laser interferometer. The position of the group measures each error separately, the degree of automation is low, and it takes a long time. The other is the indirect error identification method, of which the most wide...

Claims

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Application Information

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IPC IPC(8): B23Q17/00B23Q17/24
CPCB23Q17/007B23Q17/2452
Inventor 刘少朋田文杰张大卫
Owner TIANJIN UNIV
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