A method for controlling tooth grinding error and contact characteristics of a cycloid bevel gear pair

Abstract

The invention discloses a gear grinding error and contact characteristic control method of a cycloidal bevel gear pair. The movement trajectory of the sand rod is a quasi-extended epicycloid; Step 2, obtain the normal vector, radial vector and curvature parameters of the center point of the tooth surface contact area of ​​the large wheel grinding tooth; Step 3, use the conjugate meshing principle to obtain the conjugate The theoretical normal vector, theoretical radial vector and theoretical curvature parameters of the center point of the pinion grinding tooth surface contact area under the contact condition; step 4, introduce the iterative solution of the tool parameters to ensure the normal vector, Radial sagittal and curvature parameters are equal to the theoretical values ​​respectively, and the continuous indexing grinding gear processing parameters of the small wheel are obtained; Step 5, according to the processing parameters obtained in Step 4, carry out continuous indexing grinding on the small wheel. It can ensure that the state of the contact area of ​​the tooth surface after continuous index grinding is consistent with the state of the contact area after end hobbing.

Description

Technical field [0001] The present invention relates to the processing of processing of the pendant tooth bevel gear, and specifically, the gear and contact characteristic control method of the wiring dentate gear side. Background technique [0002] The end rolling clamping method can be continuously processed, while the end milling method can only perform single-degree processing, that is, after the processing is completed, the cutter disc is separated from the tooth blank, and the tooth blank rotates an angle, and then processed . Therefore, end-faced toblasts have higher processing efficiency compared to end milling, and is widely used in the gear industry. However, due to the forming principle of the end surface rolling toothing, the longitudinal tooth profile of its production wheel tooth surface is a extension outer wiring generated by continuous indexing motion, and the end-faced hob gear is difficult to use a grinding wheel. [0003] The pendant toothcass gear is capable ...

AI Technical Summary

Problems solved by technology

However, for gear pairs with large deformation after heat treatment, the grinding process cannot change the position of the contact area. Therefore, the grinding process has certain application conditions and cannot be used in the case of large deformation during heat treatment. The gears with over-toothed teeth can only be used in pairs and do not have good interchangeability

Or use cemented carbide blades to scrape and remove a thin layer of hardened surface for finishing, but when using cemented carbide scraping tools, higher requirements are placed on the strength of the tool and the rigidity of the machine tool to avoid Due to the periodic fluctuation of the cutting force, the tool is damaged, resulting in a large cost loss. This method is difficult to adapt to the trend of modern manufacturing

Moreover, the forming principle of the gear grinding method has changed compared with the face hobbing method, and the shape of the tooth surface has also changed, which will cause the shape and position of the contact area of ​​the large and small wheels of the gear pair to change, which will affect the contact transmission performance of the gear pair.

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