Group hole measurement swing angle planning method based on three-coordinate probe

Abstract

The invention relates to the field of aircraft geometric quantity measurement, in particular to a group hole measurement swing angle planning method based on a three-coordinate probe. The method comprises the following steps: 1) solving a limit included angle alpha between the probe and a hole without interference; 2) generating a machine tool node Ai by taking 2alpha as an interval; 3) solving the relative swing angle of the machine tool, and establishing a set X; 4) solving the number of elements which do not exceed alpha from the X; 5) taking out the node Aii with the largest element number; (6) if Yi is a null set, reducing the interval, dividing again to generate more dense nodes, and repeating the step (3) and the step (5); and 7) after the Yi is removed, if X is a null set, completing planing and if X is not a null set, repeating the step 4) until X is a null set. According to information such as the size of the three-coordinate probe and measurement parameters of the group hole, group hole measurement under the machine tool swing angle can be realized as little as possible, the swing angle needing to be calibrated is reduced, and the calibration efficiency of the group holehigh-precision measurement based on the three-coordinate probe is improved.

Description

technical field [0001] The present application relates to the field of measurement of aircraft geometric quantities, in particular to a method for planning the swing angle of group hole measurement based on a three-coordinate stylus. Background technique [0002] In order to meet the connection strength requirements of aircraft, aircraft parts generally have a large number of guide holes for installing bolts or rivets. With the improvement of aircraft performance requirements, aircraft parts are more curved and complex, which makes the normal distribution of the guide holes on the parts different, and the accuracy requirements for the hole positions and apertures of the guide holes are also higher. [0003] At present, the measurement of the hole position and diameter of the hole is generally carried out by using a three-coordinate stylus on a three-coordinate measuring machine or a five-axis machine tool through a probe measurement method. In order to avoid the interferenc...

AI Technical Summary

Problems solved by technology

Due to the large number of guide holes on the part, they form a group of holes, and the axes of each hole are different. Calibrating all the swing angles will greatly reduce the efficiency of group hole measurement and inspection.

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