Helical teeth elliptic gear as well as method for three-dimensional model-building accurately and entity shaping

Abstract

The invention relates to an elliptic gear with skewed teeth and a manufacturing method for a three-dimensional precise modeling and an entity shaping thereof, wherein in the method, by simulating the principle that a helical rack is meshed with the elliptic gear with skewed teeth and utilizing that a cutter pitch line plane of a standard normal surface parameter helical rack is always tangent to and keeps a relative generating motion of the pure rolling against a pitch curve cylindrical surface of the skewed tooth elliptic gear blank, a three-dimensional design software precisely shows a space tooth profile curved surface of the elliptic gear with skewed teeth by a helical tooth surface of the helical rack, thereby directly obtaining a three-dimensional model of the elliptic gear with skewed teeth; moreover, the shaping manufacturing entity of the elliptic gear with skewed teeth can be further obtained by utilizing the quick shaping technology. The method of the invention successfullyavoids design bottlenecks of the deduction of the complex space curved surface equation of the tooth profile of the elliptic gear with skewed teeth and the corresponding three-dimensional modeling ofthe space curved surface, and opens up a new shortcut for the precise design and manufacturing of the elliptic gear with skewed teeth.

Description

technical field [0001] The invention belongs to the field of helical elliptical gears, in particular to a helical elliptical gear and its three-dimensional accurate modeling and solid forming manufacturing method. Background technique [0002] With the development of mechanical equipment in the direction of high speed, high power and high precision, new and higher requirements are put forward for the transmission performance, service life and structural optimization of the most widely used gear mechanism in various mechanical equipment. There are two types of spur gears with fixed transmission ratio: spur gears and helical spur gears. Helical spur gears have been widely used due to their advantages such as smooth operation. During the transmission process of the oval gear, its pressure angle, tooth shape meshing line and the speed of the driven theory all change, which increases the instability of the transmission. Therefore, there is an urgent need to improve the transmis...

AI Technical Summary

Problems solved by technology

[0003] Various shapes of straight-toothed non-circular gears are currently researched relatively maturely, but for helical-toothed non-circular gears, it is still limited to theoretical research on the derivation and numerical calculation of tooth profile curves and complex space surface equations, and is effectively suitable for engineering. The three-dimensional accurate modeling and solid forming manufacturing method of helical non-circular gears that are directly applied have not been reported at home and abroad.

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