Gear precision measurement and evaluation method

Abstract

The invention discloses a gear precision measurement and evaluation method, and the method comprises the following steps: scanning a detected gear, and building an actual model of the detected gear according to the scanning data; carrying out the overlapping of the actual model of the detected gear with a standard 3D model; selecting sections of the overlapped models for comparison; and judging whether a point on the section of the actual model exceeds a tolerance zone selected from the actual model or not. The method enables the measurement data of the gear to be visual, simple and easy, and does not need an excessively professional technical background. The method does not need gear dedicated measurement equipment, and reduces the cost of dedicated instruments. The method is complete in data information, can comprehensively manage and control all data features of a gear section, and also can enable the measured data to be directly read in design or analysis software for use. The method is high in efficiency, can be used for online measurement of gear parts in batch production, and enables the quality of a product to be easy to manage. The method can be suitable for the data systematic management of a gear product, and achieves the analysis application of tracking and complex data.

Description

technical field [0001] The present invention relates to the field of gear measurement, more precisely, the present invention particularly relates to a method for measuring or evaluating the precision of gears, by which various gears, such as metal gears, plastic gears, sintered gears, oversized gears, Measure and evaluate the accuracy of various gears such as super small gears. Background technique [0002] The evaluation method of gear accuracy widely used now is based on traditional metal gears and established on the basis of fan-forming processing principles such as gear hobbing machines or gear grinding machines. The following two methods are commonly used: [0003] The first type: the special instrument for the gear measurement center is expressed by the analysis and evaluation of more than five items such as tooth profile error, point error, tooth pitch error, eccentricity error, and cross-ball distance, and dozens or hundreds of items of data, which requires professio...

AI Technical Summary

Problems solved by technology

The price of standard gears is relatively expensive, and there are few evaluation data that can be provided. There are only six data of single tooth error, comprehensive error of all teeth, eccentric error, and center distance variable maximum, minimum, and average values. The error of gears cannot be fully expressed. It is difficult for technicians to directly use the provided error data to correct the process and process

[0005] To sum up, the above two methods have the following disadvantages and deficiencies: 1. The data of the gear tooth surface is not comprehensive enough; 2. The expression method of the error is not intuitive, and is usually expressed by a schematic line; 3. It requires special professional personnel to grasp and Use these data; 4. Professional instruments require professional operators, which makes the test very limited; 5. The efficiency of the two measurement methods is low, and can only be used for sampling inspection, and cannot be used for online full inspection and systematic management of mass production , which does not meet the needs of the current and future high-end industries

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