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Optical hole inspection device

A detection device and optical technology, applied in the direction of using optical devices, measuring devices, instruments, etc., can solve the problem of difficulty in obtaining high detection accuracy of hole straightness, and achieve the effects of reducing bending deformation, reducing detection errors, and eliminating gaps

Active Publication Date: 2022-01-28
ZHONGBEI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

As a result, automatic changes in the center of the spot may occur, making it difficult to obtain high hole straightness detection accuracy

Method used

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  • Optical hole inspection device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach 1

[0028] Embodiment 1: The workpiece with a hole is moved along the guide body, and the positions of the light spots corresponding to the entrance and exit positions of the hole are consistent. Sampling two-point connection method to fit the hole axis with the hole entrance and hole exit. Calculate the straightness or other quality errors of the hole according to the reading difference of the light spot at other parts of the hole relative to the entrance and exit light spots.

Embodiment approach 2

[0029] Embodiment 2: The workpiece with a hole is moved along the guide body, and the position of the light spot corresponding to the entrance position and the exit position of the hole of the probe is consistent. Sampling least squares method to fit the hole axis. Calculate the hole straightness or other errors from the distance from the point to the straight line.

Embodiment approach 3

[0030] Embodiment 3: When the workpiece with a hole is moved along the guide body, the position of the light spot corresponding to the entrance position and exit position of the probe head is inconsistent. Sampling two-point connection method to fit the hole axis with the hole entrance and hole exit. Calculate the hole straightness or other errors from the distance from the point to the straight line.

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PUM

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Abstract

The invention belongs to the field of mechanical manufacturing, and in particular relates to an optical hole detection device for detecting shape and position errors such as hole straightness. The device includes a reference part, a driving part, a detecting part, an optical part and a reading part. The angle between the movement direction of the workpiece or the detection part with the hole and the vertical line is less than or equal to 45 degrees. Vertical placement can reduce the bending deformation of the detection part, and eliminate its gap by gravity. The human hand or the driving part moves the workpiece with a hole or the detection part relative to the reference part; the detection part can move around the fulcrum in space, the detection head and the hole wall; the light and the spot change with the movement of the detection part; the position of the spot or its The transformed information can be displayed; the light passes through the outside or inside of the hole; the length of the light is greater than or less than or equal to the length of the workpiece, and the former can be displayed after the error is amplified. In one detection, the distance between the light emitting device and the light receiving device is constant, which is beneficial to improve the detection accuracy.

Description

technical field [0001] The invention belongs to the field of mechanical manufacturing, and in particular relates to an optical hole detection device. Background technique [0002] The straightness error of the deep hole can be obtained by contacting the measured object. At present, the common methods are: using the plug gauge detection scheme, using the vernier caliper to measure the wall thickness at both ends for comparison, and using the side head to move along the hole to drive the lever position change detection methods, etc. The gauge inspection method is a method for evaluating the straightness error of deep-hole parts commonly used in production practice. When testing, the gauge is placed in the hole, and the gravity component along the axis of the hole is generated by the inclination of the deep-hole part to provide the force for the gauge to pass through. . If the gauge passes smoothly, it is considered that the straightness error value is small and the machining...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01B11/27G01B11/26
CPCG01B11/27G01B11/26
Inventor 于大国沈兴全
Owner ZHONGBEI UNIV