Quick positioned detecting method for thickness size of variable thickness part and auxiliary detecting device

Abstract

The invention provides a quick positioned detecting method for a thickness size of a variable thickness part and an auxiliary detecting device. Firstly, a plate-shaped auxiliary detecting device provided with a right-angle bending edge is produced, and array holes regularly arranged by a plurality of different detecting points and hole center longitude and latitude scribed lines are formed on the plate surface of the auxiliary detecting device; and then, the hole system positions on the plate surface of the auxiliary detecting device are leant against and bonded on a plane to be detected of the variable thickness part, a positioning reference hole (9) is determined in end holes of the hole system, and a Y-direction size scribed line (7) and an X-direction size scribed line (8) are scribed on the part to be detected respectively; the Y-direction size scribed line and the X-direction size scribed line are aligned to the hole center longitude and latitude scribed lines of the hole system when detecting; and finally, different positions of the hole system are touched by a probe of an ultrasonic thickness meter to obtain thickness values which are obtained by measuring. The auxiliary detecting device comprises an L-shaped mother board which is provided with a right-angle bending edge, and combination son boards extending to two sides; and the whole surface of the device is provided with a regular hole system, and dovetail grooves and dovetail bosses for positioning and connection.

Description

technical background [0001] The invention relates to a method for locating and detecting the thickness dimension of a variable-thickness part and a general auxiliary detection device for the variable-thickness dimension of the part. [0002] In the manufacturing process of the machinery industry, parts with variable thickness and size are often encountered. In addition to ensuring the size of the shape, the wall thickness of such parts is also very important. If the part is ultra-thin and not strong enough, if the part is too thick, it will be overweight. Therefore, the wall thickness of such parts is stipulated in the corresponding technical documents. Tolerance requirements are met, but the detection of variable thickness dimensions of such parts is quite troublesome. Dimensions of variable thickness parts usually include: 1. The variable thickness dimension is formed by a curved surface and the inner shape is a plane; 2. The variable thickness dimension is a flat surf...

AI Technical Summary

Problems solved by technology

The CNC measuring machine measures both sides of the variable thickness dimension, but according to the dimensional chain principle, the tolerance of the outer surface and thickness dimension given by the technical documents, the tolerance of the inner surface cannot be converted.

Therefore, even if the NC measurement of the inner surface is correct, it cannot explain the accuracy of the thickness dimension at the variable thickness

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