A working sample measuring and testing method for testing couplers

Abstract

The invention discloses a work template metering detection method for examining a coupler. The method comprises step of scanning a coupler work template via a three-dimensional shooting and measuring system, and carrying out full-size data fitting and comparison on the obtained detection template three-dimensional point cloud model and a designed CAD standard model, thereby examining making errors of the work face of a detection template and achieving the objective to judge whether the detection template is qualified or not. According to the invention, by replacing the traditional three-layer grade physical measurement method via a proofreading template metering work plate and a standard template metering and proofreading template, digitalization of metering of the work template is achieved; manufacturing errors of physical samples and metering accumulation errors are avoided; metering levels are reduced; precision of metering of the coupler detection work template is improved; and the consistency of couplers of railway vehicles and parts of the vehicles is improved.

Description

technical field [0001] The invention relates to a method for measuring and detecting a working sample for inspecting couplers of railway wagons. Background technique [0002] The coupler is a key part of the connecting part of the railway freight car. Before the newly manufactured coupler is loaded, the three-state action of the coupler needs to be inspected. The dimensional accuracy of the parts included in the coupler composition is high. Parts are subject to strict dimensional inspection. The size inspection of each part of the coupler is carried out with the corresponding working samples. [0003] There are three levels of testing samples. The sample that directly checks the size of the coupler is called a working sample, such as figure 2 As shown; due to the wear and tear of the working sample, it is the proofreading sample that is used to measure the working sample, such as image 3 shown; similarly, it is the reference sample that is measured for the proofreading s...

AI Technical Summary

Problems solved by technology

[0004] In the above three levels of operations, the proofreading sample is used as the measurement standard of the working sample. Usually, only part of the size of the working sample can be inspected, and full-scale measurement cannot be performed. Due to reasons such as manufacturing, transportation, and storage environment, it is easy to produce structural size errors and Deformation, rust, etc. will cause errors in the measurement of the working sample, and the reference sample will also have similar problems

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