A Method for Precise Extraction of Cycloidal Gear Profile Error and Rapid Analysis of Key Shape and Position Accuracy

Abstract

The present invention provides a method for accurately extracting that profile error of cycloidal gear and rapidly analyzing the key shape and position accuracy. By means of variable magnification measurement, the use of a combination of panoramic and accurately measured fields of view, the detection path planning of the tooth profile and the position precision of the mounting hole of the cycloidal gear are reailzed, the extraction of the outline of the mounting hole, the accurate establishment of the workpiece coordinate system, the extraction of the tooth profile outline in turn according tothe detection path are completed, and each outline coordinate point through image data processing is obtained, thereby obtaining the tooth profile error of the cycloidal gear and the position error of the mounting hole.

Description

technical field [0001] The invention belongs to the field of precision measurement of complex profiled workpieces, and in particular relates to a method for accurately extracting cycloidal gear profile errors and quickly analyzing key shape and position accuracy. Background technique [0002] Cycloidal pinwheel reducers have the advantages of small size and large transmission ratio, and are widely used in textile, metallurgy, machinery, mining, chemical and other industries. The cycloidal gear is the key part of the cycloidal pin wheel planetary transmission, and its production quality depends on the detection method to a large extent. At the same time, the cycloidal gear is still an important part that affects the performance of the robot joint reducer. During operation, its cycloidal tooth profile and the standard pin wheel are in a state of multi-tooth seamless meshing, and half of the pin teeth push the cycloidal gear at the same time. Movement is an over-positioning st...

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Problems solved by technology

[0004] In the Chinese patent "A Measuring Method for Tiny Modulus Gears" (201711159876.0), the measurement object is a small modulus gear, and the image acquisition equipment white light interferometer used is expensive, but it is only used to measure the edge of the contour, and the equipment is not fully utilized

In terms of measurement accuracy, although the accuracy of measuring the surface of an object reaches 0.01nm, the accuracy of measuring small modulus gears is only related to the pixels of the CCD camera and the size of the CCD, so its accuracy is far below 1nm

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