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A high-precision detection method for taper hole cone angle based on compound probe

A detection method and high-precision technology, applied in measuring devices, instruments, optical devices, etc., can solve problems such as limited measurement accuracy, and achieve the effects of high-precision detection, wide application range and high efficiency

Inactive Publication Date: 2018-06-15
ZHENGZHOU UNIVERSITY OF LIGHT INDUSTRY
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

This type of method is easy to operate, but due to the introduction of indirect measurement errors, the measurement accuracy is limited

Method used

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  • A high-precision detection method for taper hole cone angle based on compound probe
  • A high-precision detection method for taper hole cone angle based on compound probe
  • A high-precision detection method for taper hole cone angle based on compound probe

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Embodiment Construction

[0017] Such as figure 1 As shown, the present invention uses a coordinate measuring machine as a measuring platform, and uses a composite measuring head to accurately measure the cone angle of the taper hole. The industrial CCD camera 1 has very high resolution and measurement accuracy in the direction of the image plane, and the laser displacement sensor 3 has high resolution and measurement accuracy in the direction of its optical axis. Based on the idea of ​​complementary advantages of the two, the present invention utilizes CCD to Measure the position of the center of the large end circle (or small end circle) of the taper hole, and then guide the laser displacement sensor 3 to realize the measurement of the symmetrical busbar pair of the taper hole. According to the angle formula of the straight line, the size of the cone angle of the taper hole is solved. Concrete implementation and steps are as follows:

[0018] (1) Construction and calibration of composite probe

[0...

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Abstract

The present invention "a high-precision detection method for taper hole cone angle based on a composite probe" belongs to the technical field of precision machinery and instruments, and involves relevant theories and knowledge in laser measurement and image processing. Taking the coordinate measuring machine as the measuring platform, a composite measuring head is used to measure the cone angle of the taper hole. The composite measuring head consists of an industrial CCD camera and a laser displacement sensor, both of which are installed on a special fixture. Firstly, by calibrating the geometrical relationship between the center of the image plane of the CCD camera and the measurement zero position of the laser displacement sensor, a mathematical model for the internal data fusion of the compound measuring head is established, so as to realize the organic fusion of the measurement data of the two. Then, by planning a reasonable measurement path and measurement process, the high-precision measurement of the cone angle of the taper hole is completed. This measurement method also has outstanding advantages in terms of measurement efficiency. Since it is measured directly on the tapered hole, there is no indirect measurement error, and the efficiency is relatively high.

Description

technical field [0001] The present invention "a high-precision detection method for taper hole cone angle based on a composite probe" belongs to the technical field of precision machinery and instruments, and involves relevant theories and knowledge in laser measurement and image processing. Background technique [0002] Tapered holes are very common in mechanical parts. According to different processing accuracy requirements, they are usually processed on CNC lathes or CNC grinders. The fit involving taper holes has the following advantages: (1) It has an automatic centering function; (2) The fit gap (interference) can be easily adjusted; (3) It has a self-locking function and can transmit a certain torque at the same time. At present, the commonly used methods for measuring the cone angle of taper holes are: (1) comparative method, such as gauge method and coloring method. This type of method usually requires the measurement operator to have rich experience, and can only ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01B11/26
CPCG01B11/26
Inventor 费致根罗国富肖艳秋杨文建云康
Owner ZHENGZHOU UNIVERSITY OF LIGHT INDUSTRY