Evaluation method of tooth profile deviation of involute cylindrical spur gear under influence of installation error

Abstract

The invention discloses an evaluation method of the tooth profile deviation of an involute cylindrical spur gear under the influence of installation error. Firstly, establishing a machine coordinate system O0-X0Y0Z0 to measure the tested gear under the machine coordinate system. The measuring positions include the upper and lower section points of the measured gear mandrel, upper end of the gear and the measuring point of the tooth profile, so that the tooth profile measuring point under the influence of the installation error is obtained. According to the two cross-section points of the mandrel under the machine coordinate system, conducting the least-square circular fitting to work out rotating shaft equation to establish the coordinate system O1-X1Y1Z. The tooth-profile measuring pointis restored to the initial position and the error of the rotation axis of the tooth-profile measuring point is corrected. The least-square plane fitting is performed on the measuring point on the upper end face of the measured gear, and the coordinate system O2-X2Y2Z2 is established with the normal vector direction of the upper end face of the measured gear being the Z2 axis with the aim of correcting the inclination error of the tooth-profile measuring point. Finally the influence of the installation error on tooth profile deviation evaluation is corrected based on the tooth profile deviationvalue worked out by calculating the rotation angle to the measuring point of the design tooth profile around gear base circle center.

Description

technical field [0001] The invention relates to the field of precision testing technology and instruments, in particular to a method for evaluating gear tooth profile deviations under the influence of installation errors. Background technique [0002] Gear is the most important and widely used transmission mechanism in mechanical transmission. Gears are widely used in automobile manufacturing, aerospace, wind power equipment and equipment manufacturing and other fields. The gear precision and quality directly affect the efficiency, noise, movement precision and service life of the equipment. With the advancement of science and technology, gears are key components, and the above-mentioned industries have put forward higher requirements for the precision of gear design and manufacturing. Since gear detection technology and gear processing technology complement each other, the detection of gears is particularly important. [0003] The measurement of tooth profile deviation, ...

AI Technical Summary

Problems solved by technology

[0007] The existence of installation error makes the actual measurement position of the gear deviate from the theoretical measurement position. If the actual measurement data is not corrected, the measurement accuracy of the gear measurement center will be reduced, and even the gear rating will be wrong.

In order to reduce the influence of installation error on gear measurement, the value of installation error should be adjusted to be as small as possible, but this takes a lot of time and installation error cannot be completely eliminated

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