A device and method for measuring the size of the spline of an outer planetary wheel

A kind of extra-planet wheel and spline technology, applied in the field of non-contact measurement, can solve the problems of difficult to meet fast, mass production, low detection efficiency, gauge disputes, etc., to improve measurement accuracy and detection efficiency, enhance clarity and The effect of contrast, good stability

Inactive Publication Date: 2016-11-30
SHANGHAI JIAO TONG UNIV +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The traditional method of measuring the size of splines is mainly through the contact measurement of comprehensive ring gauges, which has the following problems: disputes over the gauges, different inspection conclusions may appear when using new gauges and old gauges to test the splines of the same workpiece; the detection efficiency is low, and it is difficult to Meet the requirements of fast and mass production; the error is large, and the wear of the gauge will reduce the measurement accuracy. Due to the manual measurement, a certain degree of human error will be caused
After relevant investigations, no reports on spline non-contact measurement methods or systems have been found at home and abroad.

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  • A device and method for measuring the size of the spline of an outer planetary wheel
  • A device and method for measuring the size of the spline of an outer planetary wheel
  • A device and method for measuring the size of the spline of an outer planetary wheel

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Embodiment Construction

[0030] The accompanying drawings disclose, without limitation, the structural schematic diagrams of the preferred embodiments involved in the present invention; the technical solution of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0031] The device for measuring the spline size of the outer planet wheel provided by this embodiment is as follows: figure 2 As shown, it is made based on the triangulation method, including a laser 5, a camera 2, a lens 3 and a mechanical structure for fixing the measured object. The mechanical structure used to fix the workpiece under test includes the turntable 4 at the bottom and the thimble 1 at the top. After the thimble 1 is pressed down, the workpiece 6 under test is axially fixed. The turntable 4 is driven by a servo motor. The laser 5 selects a 20mW large divergence angle bar laser. The camera 2 selects a 5 million pixel CCD camera for use. Lens 3 is a 50mm fixed-focus lens. ...

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Abstract

The invention discloses a measuring device for the spline size of an outer planetary wheel based on a triangulation method, which includes a laser, a camera, a lens and a mechanical structure for fixing a workpiece to be measured. At the same time, a method for measuring the spline size of an alien wheel is disclosed. The method uses a laser as structured light, a CCD camera captures the spline profile, and obtains the spline size through calibration and image processing calculations, which can realize non-contact measurement of the alien wheel. The major diameter, minor diameter, two pitches and indexing errors of the wheel spline. The design of this device enhances the clarity and contrast of the spline outline image; the turntable of the fixed outer star wheel and the synchronously rotating thimble structure have high dynamic accuracy, which reduces the accuracy drop caused by the wear and tear of the mechanical structure; The highest repeatability of the star wheel spline size can reach +0.01mm, and it has good stability.

Description

technical field [0001] The invention relates to a non-contact measuring method and measuring device based on a triangulation method, in particular to a non-contact measuring method and a measuring device dedicated to the spline size of an outer planetary wheel, and belongs to the field of non-contact measuring. Background technique [0002] As the main part of the transmission shaft of the automobile, the outer star wheel has the dimensional accuracy of its splines, which is an important quality index. The traditional method of measuring the size of splines is mainly through the contact measurement of comprehensive ring gauges, which has the following problems: disputes over the gauges, different inspection conclusions may appear when using new gauges and old gauges to test the splines of the same workpiece; the detection efficiency is low, and it is difficult to Meet the requirements of fast and mass production; the error is large, and the wear of the gauge will reduce the ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01B11/24G01B11/00
Inventor 蔡艳孙大为朱俊杰吴毅雄叶连祥田华胡志云
Owner SHANGHAI JIAO TONG UNIV
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