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Narrow clearance groove herringbone gear offset forming machining method

A herringbone gear, forming processing technology, applied in the direction of belts/chains/gears, gear teeth, components with teeth, etc., can solve the problems of low processing efficiency of herringbone gears, poor tooth surface accuracy, etc., to avoid tool manufacturing Difficulty, reduction of tool diameter, effect of improving tool strength and life

Active Publication Date: 2020-09-22
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 disadvantages of low processing efficiency and poor tooth surface precision of herringbone gears in the prior art, and provide a method for forming and processing herringbone gears with narrow hollow sipe offset distance

Method used

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  • Narrow clearance groove herringbone gear offset forming machining method
  • Narrow clearance groove herringbone gear offset forming machining method
  • Narrow clearance groove herringbone gear offset forming machining method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0069] 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, base circle radius r b =160.687mm, involute starting radius r f = 164.032mm.

[0070] The specific implementation is as follows:

[0071] (1) Calculate the gear deflection angle based on the indexing circular tooth profile point:

[0072] 1) Alveolar half angle of base circle: σ b =3.468°

[0073] 2) Gear deflection angle:

[0074] (2) Set the nominal radius r of the forming knife C =8mm, such as figure 1 As shown, the tool radius of the forming tool on the gear index circle is a nominal value, the gear tooth shape at this position rotates around the tool axis to form the tool turning surface, and the working tooth surface forming tool edge shape can be expressed as

[0075]

[0076] (3) Determine the adjustment parameters of the toot...

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Abstract

The invention discloses a narrow clearance groove herringbone gear offset forming machining method, and belongs to the field of herringbone gear machining. The machining method comprises the steps that (1) the rotation angle of a machined herringbone gear is calculated according to herringbone gear parameters; (2) the profile of a working tooth surface forming tool is determined; (3) adjustment parameters of a tooth surface forming machine tool are determined, wherein the adjustment parameters comprise a tool center distance XM, center height YM and correction ZM along the axial direction of the gear; (4) the profile of a tooth root transition curved surface tool is determined; (5) a path of a tooth surface machining tool is planned; and (6) a tooth indexing machining scheme is determined.According to the machining method, an end mill with the simple outline is adopted, finish machining of the narrow clearance groove herringbone gear is carried out through a four-axis linkage machinetool single-face forming method, and the machining efficiency and precision are greatly improved.

Description

technical field [0001] The invention belongs to the field of herringbone gear processing, in particular to a narrow hollow sipe herringbone gear offset forming processing method. 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 retains the advantages...

Claims

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Application Information

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IPC IPC(8): B23F7/00
CPCB23F7/00
Inventor 郭文超毛世民
Owner XI AN JIAOTONG UNIV