Method for determining spatial coordinates of rotation center of turntable

Abstract

The invention provides a method for determining the spatial coordinates of the rotation center of a turntable. The method is based on a visual coordinate measuring system which is composed of a worktable, a turntable, an imaging device, an attitude adjustment mechanism and a three-dimensional moving bridge and has three linear motion axes X, Y, Z and a rotary motion axis A. By means of a cuboid calibration block made of hard alloy steel, the method accomplishes image acquisition for edges of the calibration block at different angular positions through the spatial linear motion of the three-dimensional moving bridge and the rotary motion of the turntable, the grating scale reading of each linear motion axis is recorded at the same time, and finally the three-dimensional spatial coordinatesof the rotation center of the turntable in a machine coordinate system of the multi-axis visual coordinate measuring system are solved by combining the thickness and height of the calibration block according to an image processing technology. The method is simple in principle and convenient in application, solves key problems in multi-axis visual coordinate measurement of rotary parts, and has great practicability and practical application values.

Description

technical field [0001] The invention relates to a method for determining the spatial coordinates of the center of rotation of a turntable, which belongs to the technical field of measurement and testing. Background technique [0002] In many industrial fields such as aviation, aerospace, weapons and ships, rotary parts account for a large proportion of various parts. Generally speaking, revolving parts refer to mechanical parts whose shape characteristics conform to the characteristics of revolving bodies. Although the structure and size of revolving parts are different due to their different uses, the detection and control of their structure and size parameters have great significance. High requirements, because many rotary parts are key components of mechanical equipment, their shape and position errors and manufacturing accuracy will have a great impact on their assembly and use performance, not only will affect the matching properties of the contact surface , It will al...

AI Technical Summary

Problems solved by technology

At present, there is no effective and reliable solution to the problem of determining the spatial coordinates of the turntable center of rotation in a four-axis visual coordinate measurement system.

Images