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Thread combined action size measurement assessment method based on non-limit boundary

A thread synthesis and dimensioning technology, applied in the direction of measuring devices, instruments, etc., can solve problems such as strong subjectivity, high labor intensity, and low efficiency

Active Publication Date: 2015-07-15
TIANJIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

For example, quantitative measurement cannot be carried out, the actual size of the thread is unknown, and the position of the thread axis cannot be measured, which is inefficient, labor-intensive, and subjective

Method used

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  • Thread combined action size measurement assessment method based on non-limit boundary
  • Thread combined action size measurement assessment method based on non-limit boundary
  • Thread combined action size measurement assessment method based on non-limit boundary

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Embodiment Construction

[0075] In order to further understand the invention content, characteristics and effects of the present invention, the following examples are given, and detailed descriptions are as follows in conjunction with the accompanying drawings:

[0076] Please refer to the accompanying drawings, a method for measuring and evaluating thread comprehensive action dimensions based on non-limit boundaries, using a thread comprehensive action dimension measuring instrument to measure thread comprehensive action dimensions.

[0077] Such as Figure 9 As shown, the thread comprehensive function size measuring instrument includes a base 201 , a numerical control turntable 202 , a z-guiding rail 203 , a z-directing slider 204 , an x-guiding rail 205 , an x-directing slider 206 and a probe mechanism 207 .

[0078] The z-direction rail 203 is vertically fixed on the base 201, on which a z-direction slider 204 is installed, on which the z-direction slider 204 is fixed with the x-direction rail 205...

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Abstract

The invention discloses a thread combined action size measurement assessment method based on a non-limit boundary. Measurement of a thread combined action size is carried out through a thread combined action size measurement instrument. The measurement method of the thread combined action size through the thread combined action size measurement instrument includes that (1) a full-thread measurement end is tightly meshed with a detected threaded workpiece; (2) the full-thread measurement end and the detected threaded workpiece carry out relative screw motions; (3) the thread combined action size measurement instrument obtains measurement data; and (4) by means of data processing, data reflecting a thread qualified rate and meshing quality are obtained. The method achieves quantitative measurement of the three-dimensional thread action size, conforms to the definition of an action size, and eliminates influences of diameter errors, flank angle errors and thread pitch errors on the action size.

Description

technical field [0001] The invention belongs to the technical field of thread detection, and in particular relates to a method for measuring and evaluating the comprehensive action size of threads based on the national standards for threads. Background technique [0002] Threaded connection is one of the commonly used joining methods of mechanical parts. The quality of threaded connection often plays a vital role in the comprehensive quality, reliability and service life of mechanical products. [0003] At present, the commonly used thread measurement methods mainly include: contour scanning measuring instrument measurement, three-dimensional coordinate measurement, laser triangulation measurement, machine vision measurement, and special measuring tool measurement of JOHNSON company in the United States. Most of these methods are measured on a single section, and the parameters of the thread are defined in three-dimensional space, and the measurement on a single section can...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01B21/00
Inventor 李杏华安鹏飞裘祖荣邹茂虎陈浩玉杨婷
Owner TIANJIN UNIV