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Calibration method for two-dimensional plane roundness error of large stroke linkage mechanism

A linkage mechanism and two-dimensional plane technology, applied in the direction of measuring devices, instruments, etc., can solve the problem that the measurement range is limited by the length of the rod, and achieve the effects of low cost, efficient calibration, and convenient compensation

Active Publication Date: 2017-01-25
XIAMEN UNIV
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  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to provide a high-precision, low-cost two-dimensional plane roundness error calibration method for a large-stroke linkage mechanism to solve the problem that the measurement range is limited by the rod length when using a ballbar to calibrate the error of the large-stroke linkage mechanism

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  • Calibration method for two-dimensional plane roundness error of large stroke linkage mechanism
  • Calibration method for two-dimensional plane roundness error of large stroke linkage mechanism
  • Calibration method for two-dimensional plane roundness error of large stroke linkage mechanism

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Embodiment Construction

[0019] The technical solution of the present invention will be further elaborated below in conjunction with the accompanying drawings.

[0020] Carry out two-dimensional plane linkage error calibration for the range of 500mm×500mm of the large-travel linkage mechanism, in which the X-axis stroke is 100-600mm, and the Y-axis stroke is -600--100mm. When the ballbar is detected on the XOY plane, one end is in contact with the magnetic ball seat on the workbench, and the other end is in contact with the magnetic ball seat on the machine tool spindle.

[0021] According to the overall linkage area of ​​the mechanism is 500mm×500mm, select the rod length of the ballbar as 150mm, such as figure 1 As shown, the overall area is divided into four local areas, and the center position of each local detection area is O 1 (x 01 ,y 01 ),O 2 (x 02 ,y 02 ),O 3 (x 03 ,y 03 ),O 4 (x 04 ,y 04 ) are (250, -250), (450, -250), (250, -450), (450, -450) respectively, move the magnetic base...

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Abstract

A large-stroke linkage mechanism two-dimensional plane roundness error calibration method relates to work piece processing two-dimensional plane error. The method comprises the following steps: the overall linkage area of a mechanism is divided into multiple local areas, every two adjacent local areas overlap, the bar length of a ball bar is selected, and linkage error detection is carried out in all the local areas to obtain multiple pieces of local linkage error information based on the center of each local area; error separation is carried out on the local linkage error information based on the center of each local area to obtain the local motion error of two linkage linear axes in each detection area and further obtain the actual coordinates of the end of the ball bar at each motion position; an overall linkage trajectory based on all the local areas is spliced according to the fact that adjacent detection areas have the same error separation information in the overlapping portion; and the center of the whole detection area is set as a common base point, the radial error of each point on the overall linkage trajectory to the base point is calculated, and the overall motion error of each linear axis of motion is separated based on the least squares algorithm for mechanism linkage error compensation.

Description

technical field [0001] The invention relates to a two-dimensional plane error in work processing, in particular to a calibration method for a two-dimensional plane roundness error of a large-stroke linkage mechanism. Background technique [0002] Due to the existence of manufacturing and assembly errors, the mechanism itself inevitably has certain errors. The precision of the mechanism itself, especially the geometric error, often greatly affects the processing and detection of the workpiece. In the past 10 years, with the rapid development of the manufacturing industry, the size of the parts has become larger, the structure has become more and more complex, and the geometric accuracy has been continuously improved. Therefore, the precision requirements for the parts processing and testing mechanisms are also getting higher and higher. Correct error identification and error compensation is an effective way to improve the machining or detection accuracy of mechanisms. [00...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01B21/00
Inventor 杨平张艳婷郭隐彪
Owner XIAMEN UNIV
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