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Apparatus and method for measuring spline dimension of besides-star wheel

A technology of outer star wheel and spline, which is applied in the field of non-contact measurement, can solve problems such as difficult to meet fast, mass production, low detection efficiency, and gauge disputes, so as to improve measurement accuracy and detection efficiency, enhance clarity and Effect of contrast, good stability

Active Publication Date: 2014-02-26
SHANGHAI JIAO TONG UNIV +1
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  • Abstract
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  • Claims
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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.

Method used

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  • Apparatus and method for measuring spline dimension of besides-star 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

Disclosed in the utility model is a triangulation method-based apparatus for measuring a spline dimension of a besides-star wheel. The measuring apparatus comprises a laser, a camera, a lens, and a mechanical structure for fixing a tested workpiece. In addition, a method for measuring a spline dimension of a besides-star wheel is also disclosed. According to the method, laser is used as structured light; the CCD camera carries out shooting to obtain a spline profile; and the spline dimension is obtained by calibration and image processing and calculation. Therefore, non-contact measurement of a major diameter, a small diameter, a distance between two pins, and a division error of the spline of the besides-star wheel can be realized. On the basis of the design of the apparatus, definition and contrast of the profile image of the spline are enhanced; due to the structure of fixation of a rotating plate and a top pin with synchronous rotation of the besides-star wheel, the high dynamic precision is realized and the precision reduction caused by mechanical structure wearing is reduced. Moreover, the highest repetition precison for besides-star wheel spline dimension measurement can reach +0.01mm; and the stability is good.

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 Applications(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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