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Method for measuring geometric parameters of large-diameter thread form

A technology of geometric parameters and thread teeth, which is applied in the field of measuring large-diameter thread profiles, can solve problems such as inability to measure thread gauges, achieve good operability, and ensure measurement accuracy.

Inactive Publication Date: 2016-03-23
SHENYANG LIMING AERO-ENGINE GROUP CORPORATION
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Solve the problem that the three-coordinate measuring machine and the universal tool microscope alone cannot measure thread parameters such as thread gauges with a diameter ≥ φ100mm and the pitch diameter of threaded parts, and meet the requirements of the production site

Method used

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  • Method for measuring geometric parameters of large-diameter thread form
  • Method for measuring geometric parameters of large-diameter thread form
  • Method for measuring geometric parameters of large-diameter thread form

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Embodiment 1

[0024] The method for measuring the geometric parameters of the large-diameter thread profile, the measurement of the geometric parameters of the large-diameter thread profile includes: thread crest diameter d, thread pitch diameter d 2 , the measurement of tooth profile angle α / 2 and pitch P;

[0025] ①Measure the thread top diameter d;

[0026] Place the measured large-diameter thread profile 1 on the plate 2, select the altimeter 3 with the appropriate maximum allowable error for measurement according to the large-diameter thread profile top diameter tolerance, and adjust the probe of the altimeter 3 based on the plate 2. Needle 4 zero position, move the probe 4 of the altimeter 3 to the highest position of the measured large-diameter thread profile 1 and read the data displayed by the altimeter 3, which is the top diameter of the measured large-diameter thread profile 1 d;

[0027] ② Measuring thread pitch diameter d 2 ;

[0028] Place the measured large-diameter threa...

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Abstract

The invention discloses a method for measuring the geometric parameters of a large-diameter thread form. Measurement of the geometric parameters of a large-diameter thread form includes measurement of thread crest diameter d, thread pitch diameter d2, form angle alpha / 2 and pitch P. Measurement of thread crest diameter d comprises the following steps: a measured large-diameter thread form is placed on a flat plate; a height gauge with maximum permissible error of measurement is selected according to the crest diameter tolerance of the large-diameter thread form; the zero of the probe of the height gauge is adjusted with the flat plate as a benchmark; and the probe of the height gauge is moved to the highest position of the measured large-diameter thread form, and the data displayed by the height gauge is read, namely, the crest diameter d of the measured large-diameter thread form. According to the method for measuring the geometric parameters of a large-diameter thread form, measurement of the geometric parameters of a large-diameter thread form is completed by a universal microscope or other common instrument and tool combinations. The measuring method is simple and has a wide range of applications, and the precision can meet the requirements of field use in production.

Description

technical field [0001] The invention relates to the technical field of measuring large-diameter thread profiles, and in particular provides a method for measuring geometric parameters of large-diameter thread profiles. Background technique [0002] The precision measurement of large-diameter threads is mainly concentrated in the field of thread gauges in the high-end precision machinery manufacturing industry, especially the measurement of large-diameter fine-pitch thread gauges. The three-coordinate measuring machine probe 9 has a large ball diameter and cannot scan the complete tooth surface. Universal tools The measuring range of the microscope is 100mm×200mm, and it is unable to measure parameters such as the pitch diameter of thread gauges with a diameter ≥ φ100mm. [0003] It is urgently desired to obtain a method for measuring the geometric parameters of large-diameter thread profiles with excellent technical effects. Contents of the invention [0004] The purpose ...

Claims

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Application Information

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IPC IPC(8): G01B21/00
CPCG01B21/00
Inventor 王呈王玉王东朱立志张露
Owner SHENYANG LIMING AERO-ENGINE GROUP CORPORATION
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