A small wheel tooth surface design method and processing method for meshing performance pre-control

Abstract

The invention discloses a pinion tooth surface design method and a processing method for pre-control of meshing performance. The method includes the presetting of the geometric transmission error, the inversion of the pinion tooth surface and the reconstruction of the pinion tooth surface, and the geometric transmission error is a polynomial function of order 2 to 8 and is preset in the inversion process of the pinion tooth surface , reconstruct the pinion tooth surface using the reversed tooth surface and the contact trajectory and the length of the ellipse. The processing method of pinion tooth surface is further expounded. The processing method includes the selection of CNC machine tools and forming tools, the establishment of the initial CNC law and the correction of the CNC law, and the iterative correction of the CNC law to make the CNC machined tooth surface approach the pinion teeth The method can effectively pre-control the geometric meshing performance of the meshing between the pinion and the face 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 a pinion tooth surface 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", which is included h...

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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 of the face gear∑ 2p , the tooth surface processed by the traditional method is called the theoretical tooth surface ∑ 2 , approximate tooth surface ∑ 2p and theoretical tooth surface ∑ 2 is internally tangent to the curve Cp, such as figure 2 shown, and ∑ 2p Approximate ∑ 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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