Method for calibrating origin position of center axis of rotary table based on visual measurement

Abstract

The invention provides a method for calibrating an origin position of a center axis of a rotary table based on visual measurement. The method comprises the following steps of: 1, fixing an integral component consisting of a calibration ball and a ball arm to the table-board of the rotary table, and deviating from the center axis of the rotary table; 2, rotating the rotary table to various angularpositions, driving an image acquisition device by a three-dimensional moving bridge to align the calibration ball and collect an image of the calibration ball with the same clarity degree and positioncentered, and record scale readings of three linear axes of X, Y and Z at each position at this time; and 3, performing least square fitting on the recorded data, and then calculating the origin coordinates of the center axis of the rotary table in a machine coordinate system of a visual measuring device, thereby determining a space position of the origin coordinates in the machine coordinate system. The method for calibrating the origin position of the rotary table center axis based on the visual measurement has simple principle, is convenient to apply, and solves the key problems in the visual measurement of the parts of the rotary body.

Description

technical field [0001] The invention is a method for calibrating the origin position of the central axis of a turntable based on visual measurement, and belongs to the field of measurement technology. Background technique [0002] In many industrial fields such as aviation, aerospace, shipbuilding and automobiles, the parts of gyratory account for a large proportion of all kinds of parts. The shape error and manufacturing accuracy of such parts will have an important impact on their assembly and service performance. It will affect the matching properties of the contact surfaces, and also affect the vibration, noise, rotation accuracy and service life of the rotating parts. For example, the projectile body of a projectile is a typical revolving part, and the excessive error of the contour shape of the projectile will affect the fit gap between the projectile and the barrel, thereby adversely affecting the initial velocity of the shot and the flight trajectory; at the same tim...

AI Technical Summary

Problems solved by technology

At present, for this problem, it is mainly achieved by calibrating the origin position parameters of the actual central axis of the turntable and supplemented by an accurate data integration algorithm. For the central axis of the turntable in the four-axis vision measurement system in the present invention The origin position calibration problem, there is no effective and reliable solution

Images