Optimal pinion tooth surface design method and processing method oriented to pre-control of meshing performance

Abstract

The invention discloses an optimal pinion tooth surface design method and an optimal pinion tooth surface processing method oriented to pre-control of a meshing performance. A pinion and straight-blade cutter one-parameter envelope method is similar to processing surface gear engagement. The pinion optimal tooth surface design method comprises the steps of preset of a geometrical transmission error, reverse solving of a pinion tooth surface and reconstruction of a pinion optimal tooth surface, wherein the geometrical transmission error is a 2-8-order polynomial function and is preset in a reverse solving process of the pinion tooth surface, and the optimal pinion tooth surface is reconstructed by use of a reversely solved tooth surface and lengths of a contact trajectory and an ellipse. The invention further describes the optimal pinion tooth surface processing method. The processing method comprises the steps of selecting a Qinchuan numerically-controlled machine tool QMK50A and a profile cutter, establishing an initial numerically-controlled law and correcting the numerically-controlled law. Through iterative correction of the numerically-controlled law, the numerically-controlled processing tooth surface approaches the optimal pinion tooth surface and a pinion is processed, and the method can effectively pre-control the geometrical meshing performance of meshing of the pinion and a surface gear.

Description

Technical field: [0001] The invention relates to the field of gear transmission, in particular to a design method and a processing method for an optimal tooth surface of a small wheel oriented to meshing performance pre-control. Background technique: [0002] The bevel gear in the meshing transmission of cylindrical gear (small wheel) and bevel gear is called face gear. Processing face gear based on traditional methods leads to poor tool versatility and requires the development of special manufacturing equipment, which is extremely unfavorable for the popularization and application of face gear, and most of them are only suitable for For orthogonal spur and helical gears. Various face gears can be processed on the existing bevel gear machine tools with straight edge cutters and special fixtures, such as figure 1 As shown, the method has been described in detail in "Machining Equipment and Processing Methods for Manufacturing Various Face Gears with Straight Cutting Tools", ...

AI Technical Summary

Problems solved by technology

The double-parameter envelope method can be used to process face gears with straight-edge cutters. The face gears processed in this way are the same as those processed by traditional methods, but the processing efficiency is not high. Using straight-edge cutters to process face gears based on the single-parameter envelope method, because Line contact, the processing efficiency is very high, but compared with the traditional processing method, it will bring a certain deviation of the tooth surface, which is called the approximate tooth surface Σ of the face gear 2p , the tooth surface processed by the traditional method is called the theoretical tooth surface Σ 2 , approximate tooth surface Σ 2p and theoretical tooth surface Σ 2 is internally tangent to the curve Cp, such as figure 2 shown, and Σ 2p Best approximation to Σ along Cp 2 , but the adverse effect of tooth surface deviation on the meshing performance is more prominent, especially shortening the length of the major axis of the contact ellipse in the geometric meshing performance, which will inevitably reduce its transmission strength

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