High-speed high-precision non-contact type coordinate measuring machine and measuring method thereof

Abstract

The invention discloses a high-speed high-precision non-contact type coordinate measuring machine and the measuring method thereof. The measuring machine comprises a machine tool. The machine tool is provided with a principal shaft. The principal shaft is provided with an object carrying station for a working piece to be clamped therein. The machine tool is further provided with a first direction feeding mechanism and a second direction feeding mechanism. The principal shaft drives the working piece to rotate. The laser displacement sensor scans the surface of the working piece and acquires the position data of the dots on the working piece through the first direction feeding mechanism and the second direction feeding mechanism. After the data processing, the three-dimensional morphology of the working piece can be obtained. The measuring method of the invention changes the moving mode of a traditional coordinate measuring machine and the straight movement in one direction of the measurement probe is changed as the rotation movement of the to-be-measured working piece, which overcomes the problem of low measurement efficiency incurred from the repetitive acceleration and deceleration of a traditional coordinate measuring machine. At the same time, the measurement probe, through the utilization of a high-precision laser displacement sensor, could increase the measurement precision of a coordinate measuring machine to a large extent and meet the requirement of modern manufacturing on the measurement precision.

Description

technical field [0001] The invention belongs to the field of precision measurement, and in particular relates to a high-speed, high-precision non-contact three-coordinate measuring machine and a measurement method thereof. Background technique [0002] As a high-precision measurement system with strong versatility and high degree of automation, the three-coordinate measuring machine has been widely used in the fields of machinery and electronics. During the working process, the three-coordinate measuring machine converts the measurement of various geometric elements of the measured workpiece into the measurement of the point set coordinates on the geometric elements. After the coordinate positions of these points are measured, the software calculates the size, shape, relative position, etc. of the measured geometric elements according to certain algorithms and evaluation criteria. At present, according to the form of the three-coordinate measuring machine probe, the three-c...

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Problems solved by technology

[0004] The purpose of the present invention is to overcome the deficiencies of the prior art and provide a high-speed, high-precision non-contact three-coordinate measuring machine and its measuring method, which changes the movement form of the traditional three-coordinate measuring The linear motion is changed to the rotational motion of the measured workpiece, which overcomes the problem of low measurement speed caused by frequent acceleration and deceleration of the traditional three-coordinate measuring machine. At the same time, the measuring head adopts a high-precision laser displacement sensor, which can greatly improve the three-coordinate measurement Accuracy, to meet the demand for measurement accuracy in modern manufacturing

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