Method for improving precision of numerically-controlled machine tool main shaft rotating thermal error measuring data

A technology of CNC machine tools and measurement data, which is applied in measurement/indication equipment, metal processing mechanical parts, metal processing equipment, etc. High stability effect

Inactive Publication Date: 2014-05-21
HEFEI UNIV OF TECH
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Problems solved by technology

However, after the thermal deformation of the spindle of the CNC machine tool, the thermal deformation of the spindle is various, including offset, warping and other forms, which leads to the change of the center position of the spindle test rod, but the spatial position of the sensor

Method used

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  • Method for improving precision of numerically-controlled machine tool main shaft rotating thermal error measuring data
  • Method for improving precision of numerically-controlled machine tool main shaft rotating thermal error measuring data
  • Method for improving precision of numerically-controlled machine tool main shaft rotating thermal error measuring data

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Embodiment Construction

[0033] see figure 1 , a method for improving the accuracy of measuring data accuracy of a spindle rotation thermal error of a CNC machine tool, specifically comprising the following steps:

[0034] (1) For the inspection rod of the spindle of the CNC machine tool, two precision displacement sensors (contact or non-contact) are placed on the X and Y directions of the same circular section passing through the center of the inspection rod to measure the distance between the sensors and the center of the inspection rod. The position X and Y direction of the displacement change of the point on the check rod. Before the thermal deformation of the main shaft of the machine tool, the radius of the inspection rod is R, the coordinates of the center of the inspection rod are O (0,0), and the coordinates of the X-direction point of the inspection rod are measured A (x 0 ,0) (x 0 =R) and Y-direction point coordinates B (0,y 0 ) (y 0 =R), such as figure 1 shown;

[0035] (2) After th...

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Abstract

The invention discloses a method for improving precision of numerically-controlled machine tool main shaft rotating thermal error measuring data. The method comprises the steps of conducting theoretical analysis calculation on thermal errors, generated by rotating of the main shaft, in the X direction and the Y direction of a main shaft, obtaining more accurate real thermal error data, avoiding the theoretical errors in the prior art, obtaining the real machine tool main shaft thermal errors in the X direction and the Y direction, and ensuring that a mathematic model built based on the data has the higher precision. According to the method, theoretical defects in a traditional numerically-controlled machine tool main shaft rotating thermal error measuring data processing method are overcome, the precise machine tool main shaft thermal error measuring data are obtained, the defects of large difference existing between compensation simulation precision of a model built based on the theoretical defect data and the real compensation power are overcome, the real effectiveness of numerically-controlled machine tool thermal error compensation modeling precision is ensured, the thermal error compensation function and thermal error compensation precision are enhanced, online accurate measuring data can be obtained through software programming, and the practicability is achieved.

Description

technical field [0001] The invention relates to the technical field of improving the accuracy of thermal error compensation of a numerical control machine tool, in particular to a method for improving the accuracy of measurement data of the thermal error of the spindle rotation of a numerical control machine tool. Background technique [0002] When the thermal error compensation technology of the spindle rotation of the CNC machine tool is implemented, the compensation amount is obtained after calculation based on the established mathematical model. The mathematical model comes from the experimental data, and the accurate experimental data has an important influence on the thermal error compensation effect of the CNC machine tool and the related thermal error analysis conclusion. At present, the experimental data of the thermal deformation of the spindle is obtained according to the method provided by the national standard "General Rules for Machine Tool Inspection Part 3: D...

Claims

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Application Information

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IPC IPC(8): B23Q17/00
CPCB23Q17/00
Inventor 苗恩铭龚亚运党连春高增汉苗继超周小帅
Owner HEFEI UNIV OF TECH
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