Tooth form geometrical parameter measurement method for online machining of large-diameter multi-thread ring gauge

Abstract

The invention provides a tooth form geometrical parameter measurement method for online machining of a large-diameter multi-thread ring gauge. The tooth form geometrical parameter measurement method for online machining of the large-diameter multi-thread ring gauge comprises the steps that machining equipment is locked, and a part measurement basis is adjusted; the thread minor diameter D1 measurement dimension is re-checked through an inside micrometer, and the thread minor diameter D1 is determined (measured); thread surface tooth form data are collected through laser scanning; the measurement value P of the thread pitch, and the measurement value theta of the tooth form angle theta are determined (measured) through fitting calculation; a steel ball calibration measurement head with the proper diameter is selected through calculation based on the theoretical thread tooth form dimension; dotting is conducted for thread measurement, the machining allowance d is determined, and the machining quantity is calculated and determined; and dotting is conducted for measuring the actual thread pitch diameter, all geometrical parameters of the tooth form of the large-diameter multi-internal-thread ring gauge are obtained. By adoption of the measurement method, the parameters of the tooth form of the ring gauge can be checked on the ring gauge machining site and are provided for machining personnel for high-precision machining, and the rate of finished ring gauges is guaranteed; and the detection precision is high, and the tooth form geometrical parameter measurement method is suitable for large-diameter multi-internal-thread ring gauges of various specifications.

Description

Technical field [0001] The invention relates to the technical field of measuring the geometric parameters of the tooth profile of an internal thread, in particular to a method for measuring the geometric parameters of the tooth profile in the online machining of a large-diameter multi-threaded ring gauge. Background technique [0002] The thread whose major diameter is greater than 300mm and the number of thread heads greater than 2 are collectively referred to as large-diameter multi-start threads. Because of the characteristics of easy assembly and strong detachability, the multi-threaded connection method is widely used in the field of mechanical manufacturing. As a complex space curved body, multi-thread detection has always been a big problem that plagues assembly and connection, and it is impossible to complete thread detection tasks quickly and in large quantities with general general-purpose inspection tools. The emergence of thread gauges solved this technical problem. ...

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Problems solved by technology

[0006] In order to solve the problems that the existing measurement technology cannot complete the detection at the ring gauge processing site, the cost of designing and processing special detection equipment is high, and it cannot meet the needs of single-piece production, the purpose of this invention is to provide a large-diameter multi-thread ring gauge on-line processing tooth profile

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