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A zero-degree rack generation processing method for narrow hollow sipe herringbone gears

A technology of herringbone gears and processing methods, which is applied to belts/chains/gears, gear teeth, components with teeth, etc., can solve the problems of poor processing accuracy and low efficiency of herringbone gears, and improve processing efficiency and gears Accuracy and the effect of reducing manufacturing cost

Active Publication Date: 2021-11-19
XI AN JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to overcome the shortcomings of poor machining accuracy and low efficiency of herringbone gears in the prior art, and provide a zero-degree rack generating processing method for herringbone gears with narrow hollow sipe

Method used

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  • A zero-degree rack generation processing method for narrow hollow sipe herringbone gears
  • A zero-degree rack generation processing method for narrow hollow sipe herringbone gears
  • A zero-degree rack generation processing method for narrow hollow sipe herringbone gears

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Embodiment

[0092] Gear parameters: number of teeth z=19, modulus m=18mm, end face pressure angle α t =20°, helix angle β=34.5°, tooth width b=330mm, undercut width 30mm, normal tooth thickness S pn =25.344mm, pitch circle diameter d p =342mm, addendum circle radius r a =182.125mm, base circle radius r b =160.687mm, root circle radius r f =156.166 mm.

[0093] See the principle of herringbone gear zero-degree rack generation figure 1 , according to the principle that the shape of the involute is the same as the base circle, a zero-degree rack that is tangent to the base circle is used to envelop the herringbone gear tooth profile. Taking the first cut of the tooth top envelope as an example, the specific implementation is as follows:

[0094] (1) Point A is taken as point A of the tooth top circle, see figure 2 , the straight line AB is tangent to the involute tooth profile at point A, the length of AB is h, point B' is the intersection of the circle passing through point B and the...

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Abstract

The invention discloses a method for generating a zero-degree rack of a herringbone gear with a narrow hollow sipe, and belongs to the field of herringbone gear processing. 1) Determine the envelope scheme of the gear tooth profile to be processed; (2) Determine the gear rotation angle of the tangent point of the working tooth surface; (3) Determine the position of the tool for machining the working tooth surface; (4) Determine the profile of the tooth root transition surface; (5) ) Determine the position of the tooth root machining tool; (6) Plan the tooth surface machining tool path; (7) Determine the tooth division machining plan. The present invention has the following advantages and effects: using a common end mill, the narrow hollow sipe herringbone gear is finished by the single-sided generating method of a four-axis linkage machine tool, which greatly improves the processing efficiency and precision; The two-stage processing method of the transition surface improves the strength and life of the tool, and reduces the complexity and manufacturing difficulty of the tool.

Description

technical field [0001] The invention belongs to the field of herringbone gear processing, in particular to a method for generating a zero-degree rack of a herringbone gear with a narrow hollow sipe. Background technique [0002] The bearing capacity and motion stability of helical gears are significantly better than those of spur gears, but as the helix angle increases, the axial meshing force increases rapidly, so it is necessary to choose a larger size that can bear radial and axial forces at the same time. At the same time, the design of the box should consider the axial force and increase the ribs, etc., which will inevitably increase the weight of the transmission system, reduce the power density, and increase the cost. [0003] In order to overcome this shortcoming of the helical gear, the two gears with the opposite helix angle and the same parameters are connected together on the same axis, and used as a gear, which is called a herringbone gear. This kind of gear re...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23F7/00
CPCB23F7/00
Inventor 郭文超毛世民
Owner XI AN JIAOTONG UNIV