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The Automatic Correction Method of Probe Offset of Polar Coordinate Gear Measuring Center

A gear measurement and offset technology, which is applied in the direction of measuring devices, instruments, etc., can solve the problem of low accuracy of measuring workpieces, and achieve the effect of reducing the installation accuracy requirements

Inactive Publication Date: 2015-12-02
XIAN TECH UNIV +1
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  • Abstract
  • Description
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  • Application Information

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Problems solved by technology

[0005] The purpose of the present invention is to provide an automatic correction method for the offset of the polar coordinate gear measuring center probe, so as to overcome the problem of low accuracy of the existing polar coordinate method for measuring workpieces

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  • The Automatic Correction Method of Probe Offset of Polar Coordinate Gear Measuring Center
  • The Automatic Correction Method of Probe Offset of Polar Coordinate Gear Measuring Center
  • The Automatic Correction Method of Probe Offset of Polar Coordinate Gear Measuring Center

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Embodiment Construction

[0034] The present invention will be described in detail below in combination with specific embodiments.

[0035] see figure 1 and figure 2 A method for automatically correcting the offset of a polar coordinate gear measuring center probe, comprising the following steps:

[0036] 1) Use the double-sided involute tooth profile to correct the offset of the probe, assuming that the radius of the base circle of the involute tooth profile is r b , using an involute template or a tooth surface of a standard involute gear, assuming that the offset in the vertical direction of the R axis caused by the installation error of the probe is b 0 Offset R with R axis direction 0 ;

[0037] 2) Clamp the involute tooth profile on the rotary shaft table, and set the measuring head at a measuring position accessible to one side of the involute tooth profile, and use the polar coordinate method to measure the involute tooth profile, which can be Obtain a series of points on the involute (R ...

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Abstract

The invention relates to an automatic correction method for the offset amount of a measuring head of a polar coordinate gear measuring center. The basic condition for the implementation of the existing polar coordinate gear measurement method is that the center of the probe must be located on the R axis when the probe is installed, otherwise it will cause zero point correction errors. The present invention uses the polar coordinate method to measure the single side of the involute gear before and after flipping, and substitutes the two groups of measured values ​​into the error calculation formula of the polar coordinate method containing offset parameters to calculate the offset amount and deviation of the measuring head. The amount of movement is introduced, and the calculation and correction formula of the workpiece measurement error is introduced to realize the automatic compensation of the installation error of the measuring head. The invention can directly calculate the offset of the measuring head relative to the original calibration center of rotation, lowers the requirement on the installation accuracy of the machine, and can also perform calibration of the measuring heads in batches, laying a foundation for realizing automatic measuring head replacement.

Description

technical field [0001] The invention relates to the technical field of coordinate measuring machines, in particular to an automatic correction method for the offset of a polar coordinate gear measuring center measuring head. Background technique [0002] The gear measurement center is the crystallization of the integrated application of information technology, computer technology and numerical control technology on gear measuring instruments, and is a milestone in the development of coordinate gear measuring instruments. It is mainly used for the detection of single geometric accuracy of gears, and can also be used for the measurement of the overall error of gears. The gear measurement center is composed of three linear axes and a rotary axis, and the linear axes are the Z axis in the vertical direction, the R axis and the T axis in the horizontal direction. Its zero point calibration methods include: standard mandrel calibration method, fixed ball calibration method, block...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01B21/00
Inventor 卢春霞王建华劳奇成李少康王晓丽张新华张盟张瑜徐臻
Owner XIAN TECH UNIV