Detection method of components and parts

Abstract

The invention provides a detection method of components and parts, so as to overcome the defects of lower precision and larger error of a traditional detection method. The detection method comprises the following steps that (1) three certified hardened steel balls with the same diameter are placed into a thread groove, the steel balls roll all the time along the direction of a helical line in the cross section of inner threads, when the steel balls roll to the highest point of the circumference, i.e. the position of a pitch diameter, a gage block is correctly used, so as to measure the thickness of the gage block, and the size of the pitch diameter of the threads is calculated through a measurement model; and (2) a workpiece is put in a position where a measuring head of a three-coordinate measuring machine can come into contact with a measured surface and a bottom surface, the workpiece is split along a rotation shaft, so as to construct a corresponding mathematical detection model which is adopted to construct a corresponding equation of a curved surface, and the distance between any point in a measuring area and the curved surface is calculated, so as to solve the processing error of the size. The detection method has the advantages of high detection precision, less error and low missing rate.

Description

technical field [0001] The invention relates to a method for detecting components. Background technique [0002] The adapter part is one of the important parts of the hydraulic rack, and its machining accuracy directly affects the overall performance and life of the rack. adapters (such as figure 1 ) is formed into a rotary disk part by CNC machining, which is conical. The busbar of the outer contour rotary surface is composed of two straight lines and a transitional arc line. There are four threaded holes and a positioning pin hole on the surface of the part. Stainless steel material , the accuracy of the upper threaded hole and the accuracy of the outer contour surface are relatively high. When testing adapters, threaded plug gauges commonly used for threaded holes are prone to wear and tear, resulting in a high rate of missed detection in the detection process. It is very difficult to inspect the processing size of the outer contour surface, because when measuring the ...

AI Technical Summary

Problems solved by technology

[0009] The invention provides a detection method of parts to overcome the defects of low precision and large error of the traditional detection method

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