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Trapezoidal thread visual detection method

A visual inspection and trapezoidal thread technology, applied in the field of trapezoidal thread visual inspection, can solve the problems of slow measurement speed, unfavorable automatic inspection speed of assembly line, low measurement accuracy, etc., and achieve the effect of avoiding system errors, strong reliability and high efficiency

Inactive Publication Date: 2016-01-20
GUANGZHOU SUPERSONIC AUTOMATION TECH CO LTD
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Problems solved by technology

[0003] The main methods of traditional thread quality inspection are thread ring gauge or plug gauge, thread micrometer measurement, tooth thickness vernier caliper measurement, three-needle measurement method, and double-needle measurement method. This measurement method has the disadvantages of slow measurement speed and low measurement accuracy. It is determined that it is not conducive to the automatic detection speed of the assembly line, and can no longer meet the requirements of modern industry on the efficiency and accuracy of threaded workpiece quality measurement.

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  • Trapezoidal thread visual detection method
  • Trapezoidal thread visual detection method

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Embodiment Construction

[0052]Below, in conjunction with accompanying drawing and specific embodiment, the present invention is described further:

[0053] Trapezoidal thread is also known as ordinary thread, and its thread shape is as follows: figure 1 As shown, the main parameters of the trapezoidal thread are: thread major diameter d, thread minor diameter d1, thread diameter d2, pitch p and tooth angle α. The trapezoidal thread visual inspection method provided in this embodiment is based on the detection of the above parameters. If the requirements are met, it proves that the trapezoidal thread is a qualified workpiece, otherwise it is unqualified.

[0054] see figure 2 , this embodiment includes the following steps:

[0055] Step s1: Establish template contour features for standard threaded workpieces;

[0056] Step s2: Establish contour features of the threaded workpiece to be detected;

[0057] Step s3: Determine whether the similarity between the profile features of the template of the ...

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Abstract

The invention relates to a trapezoidal thread visual detection method, which comprises the steps of establishing template contour features of a standard thread workpiece; establishing contour features of a thread workpiece to be detected; judging whether the similarity of the template contour features of the standard workpiece and the contour features of the workpiece to be detected reaches a preset value or not and whether a target number is satisfied or not; and if so, determining the thread workpiece to be detected is preliminarily qualified, further detecting whether various parameters of the thread workpiece to be detected conform to the standard or not, if not, determining the thread workpiece to be detected is not qualified, and abandoning the thread workpiece. The trapezoidal thread visual detection method carries out multi-layer detection by being combined with characteristics of a trapezoidal thread, caries out comparison on an entity workpiece and the standard workpiece, and has high-precision detection guarantee. The measurement method is high in efficiency and reliability.

Description

technical field [0001] The invention relates to the technical field of thread detection, in particular to a visual detection method for trapezoidal threads. Background technique [0002] With the rapid development of industrial technology, the degree of automation of mechanical devices is getting higher and higher, and in this process, the requirements for the precision of workpieces in manufacturing are getting higher and higher. [0003] The main methods of traditional thread quality inspection are thread ring gauge or plug gauge, thread micrometer measurement, tooth thickness vernier caliper measurement, three-needle measurement method, and double-needle measurement method. This measurement method has the disadvantages of slow measurement speed and low measurement accuracy. It is determined that it is not conducive to the automatic detection speed of the assembly line, and can no longer meet the requirements of modern industry for the efficiency and accuracy of threaded w...

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Application Information

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IPC IPC(8): G01B11/24
Inventor 张俊峰
Owner GUANGZHOU SUPERSONIC AUTOMATION TECH CO LTD
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