An image detection device and detection method for the position degree of a hole group

Abstract

The invention relates to the test measuring appliance field, especially an image detection device and detection method for position accuracy of hole group. The image detection device for position accuracy of hole group comprises a base capable of being horizontally fixed on a detected platform; a telescoping cylinder installed on the base, and capable of telescoping and moving along an axial direction, and rotating centering the axis of the base; and an image collection component located at the telescoping and moving end of the telescoping cylinder, and used for locating the detected hole on the detected platform, and performing position data collection on the detected hole. The image detection method for position accuracy of hole group is based on the image detection device for position accuracy of hole group. The image detection device for position accuracy of hole group has the characteristics of simple structure, and great mobility, and can complete coplane hole group position accuracy measurement whenever and wherever possible, reduce measurement costs, improve measure efficiency, and furthermore increase machine manufacturing production efficiency.

Description

technical field [0001] The invention relates to the technical field of testing and measuring instruments, in particular to an image detection device and a detection method for the position degree of a hole group. Background technique [0002] In the mechanical field, a series of holes are sometimes machined in a flat surface to accommodate other components. When punching holes, a straightedge or other measuring tools must be used to ensure the processing accuracy, and the requirements for the position of the holes are very strict. [0003] Commonly used detection equipment for measuring the position of the hole group includes a three-coordinate measuring instrument and a projection measuring instrument. During use, these instruments require a processing surface of the part itself as a measurement reference surface. These instruments are used for machining parts with small dimensions. The position and size of the hole can be accurately obtained. However, for parts whose ext...

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Problems solved by technology

However, for parts whose external dimensions exceed the range of the holding instrument or the surface of the part does not have a processed surface as a measurement datum, such as large welded structural parts, these methods cannot obtain measurement results quickly and economically.

In addition, when measuring, it is necessary to equip corresponding rolling rods corresponding to the hole diameters. After inserting the rolling rods into the holes, the round holes are transformed into cylinders and measured with three coordinates. This measurement method is usually prone to the following errors: On the one hand, it comes from the difference between the rod and the hole. The matching error, on the one hand, comes from the deformation error of the rod itself, so the cumulative error in measurement is large, and the measurement accuracy cannot be guaranteed

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