Measuring head calibration method of thread combined function dimensional measurement instrument

Abstract

The invention discloses a measuring head calibration method of a thread combined function dimensional measurement instrument. According to the measuring head calibration method, a standard cylinder is used for calibrating a reference zero position value of a measuring head of the thread combined function dimensional measurement instrument. The measuring head calibration method includes the following steps of placing and fixing the standard cylinder in the middle of a numerical control rotary table, enabling a full-thread measuring end to be closely attached to the standard cylinder, enabling the numerical control rotary table to rotate for a circle, and obtaining corresponding collection values of two axial micrometers at any rotary angle of the numerical control rotary table, a collecting value of a lateral micrometer, an X-direction coordinate of an X-direction sliding block and a Z-direction coordinate of a Z-direction sliding block; obtaining a corresponding position posture reference zero position value parameter of the full-thread measuring end at the any rotary angle of the numerical control rotary table through data treatment, and conducting measurement based on the corresponding position posture reference zero position value parameter. The measuring head calibration method of the thread combined function dimensional measurement instrument achieves calibration of the thread function dimensional reference zero position value parameter in three dimensions through the simple standard cylinder, and a function parameter of the standard cylinder is directly measured. Therefore, the measuring head calibration method of the thread combined function dimensional measurement instrument fits in with consistency of calibration and a measuring method.

Description

technical field [0001] The invention belongs to the technical field of thread detection, in particular to a method for calibrating a measuring head of a thread comprehensive action dimension measuring instrument. Background technique [0002] Thread connection is a commonly used and important connection method in mechanical connection. The detection of thread quality is of great significance to the production, processing and use of threads. [0003] There are many methods for thread detection. The comprehensive function size detection of thread is generally carried out by limit gauge, while single measurement includes three-needle method, contour scanning method and so on. Judging from the types of thread geometric error generated in the thread production process and the definition of thread parameters in national standards, most of these methods have flaws. One is to use local measurement or single-section measurement data to express the thread that was originally defined ...

AI Technical Summary

Problems solved by technology

Judging from the types of thread geometric error generated in the thread production process and the definition of thread parameters in national standards, most of these methods have flaws. One is to use local measurement or single-section measurement data to express the thread that was originally defined in three-dimensional space. The second is to use a single parameter or the action size estimated by a single parameter to express the comprehensive quality status of the thread; the third is to use single-section measurement data, which cannot determine the actual axis of the thread as a whole

The parameters of the thread in the national standard are defined in three-dimensional space, and the measurement on a single section cannot accurately evaluate the actual screwing quality of the thread

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