Analysis of auxiliary crowning in parallel gear shaving

Hsu, Ruei‐Hung; Fong, Zhang‐Hua

doi:10.1016/j.mechmachtheory.2010.04.002

Cited by 14 publications

(6 citation statements)

References 6 publications

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“…The VPA coefficient is slight nonlinearly dependent on the helix angle for the shaving cutter, as shown in Figure 14. This is easily determined using equation (16).…”

Section: Resultsmentioning

confidence: 99%

“…Although this is still considered to be a standard pitch cylinder model, further study of the meshing point between the work gear and the shaving cutter during pitch cylinder operation was needed. Hsu and Fong 16 and Tran et al 17 proposed a mathematical model for pitch cylinder operation for the tooth profile of a work gear that is finished by parallel shaving with an auxiliary crowning mechanism. To localize the gear tooth contact pattern and to allow perfect transmission errors, a novel double-crowned tooth geometry is used ease-off topography for a spiroid gear that was manufactured using a precision casting process.…”

Section: Introductionmentioning

confidence: 99%

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Manufacturing helical gears with double-crowning and twist-free tooth flanks using a variable pressure angle shaving cutter

Hsu

Tran

2017

Proceedings of the Institution of Mechanical Engineers, Part B:

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For a parallel gear shaving process, the tooth flanks of a shaved work gear surface are longitudinally crowned using an auxiliary crowning mechanism. However, the flanks are only crowned in the longitudinal direction and not in the cross-profile direction so there is a natural twist on the shaved work gear surfaces. A new shaving method for double-crowning that has no natural twist in the tooth flanks on the work gear surfaces is proposed, which uses a variable pressure angle shaving cutter in a parallel gear shaving process. Three numerical examples are presented to verify the merits of the proposed shaving method. The tooth flanks are crowned in both the cross-profile and the longitudinal directions, and natural twists in the shaved tooth flanks are reduced significantly.

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“…The VPA coefficient is slight nonlinearly dependent on the helix angle for the shaving cutter, as shown in Figure 14. This is easily determined using equation (16).…”

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Manufacturing helical gears with double-crowning and twist-free tooth flanks using a variable pressure angle shaving cutter

Hsu

Tran

2017

Proceedings of the Institution of Mechanical Engineers, Part B:

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“…Seol and Litvin [3] proposed a mathematical model of the crowned helical gear after the gear shaving process. Hsu and Fong [4] proposed a mathematical model of parallel crowned shaving process with a rock mechanism. Hsu, Wu, and Tran [5] proposed a shaving method for double crowning that has no natural twist in the tooth flanks on the work gear surfaces is proposed, which uses a variable pressure angle shaving cutter in a parallel gear shaving process.…”

Section: Introductionmentioning

confidence: 99%

Study on Crowning of helical gear shaved by CNC shaving machine with three synchronous axes

Hsu¹,

Han²

2019

MATEC Web Conf.

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Gear Shaving is the most efficient and economical ways to finish gears before heat treatment. The workpiece after shaving operation can reduce the running noise, which often used in the automobile industry. In this paper, we propose a mathematical model of a CNC shaving machine with multi-synchronous axes. The proposed mathematical model can be used to calculate the crowning tooth surface of the gear in parallel-shaving process.

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“…6,7 There are several common synchronization techniques for different standard industrial applications, including master-slave, cross-coupled, 8–10 bi-axial cross-coupled control, 11 electronic (virtual) line-shafting 12 and relative coupling. However, the gear-generation process is different from general numerical control (NC) machining, 13–16 that is, turning and milling machine tools. Gear production depends on the coupled movement of a hob cutter axis, gear blank axis and the additional movement of the feeding axes, all of which is controlled by an EGB.…”

Section: Introductionmentioning

confidence: 99%

A new electronic gearbox for gear hobbing machines

Tian

Han

Xia

2015

Proceedings of the Institution of Mechanical Engineers, Part B:

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This article presents a new kind of software-defined electronic gearbox for gear hobbing based on a theoretical model of the hobbing process. The electronic gearbox implementation and structure are studied in an embedded numerical control system (numerical control/computer numerical control). Data flow among the electronic gearbox modules is also analyzed in the numerical control system. Special G-codes with parameters are designed, and the electronic gearbox control implemented through numerical control programming is realized in a custom gear hobbing numerical control system. In addition, two different hobbing methods (axial and diagonal) are tested on the computer numerical control platform. Results show that the hobbing computer numerical control with the proposed electronic gearbox functions accurately, and error is measured using tracking errors in different axes and gear pitch error of the machined gear. As will be shown, the gear pitch error was found to be 0.0147 mm for axial hobbing and 0.0176 mm for diagonal hobbing.

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Analysis of auxiliary crowning in parallel gear shaving

Cited by 14 publications

References 6 publications

Manufacturing helical gears with double-crowning and twist-free tooth flanks using a variable pressure angle shaving cutter

Manufacturing helical gears with double-crowning and twist-free tooth flanks using a variable pressure angle shaving cutter

Study on Crowning of helical gear shaved by CNC shaving machine with three synchronous axes

A new electronic gearbox for gear hobbing machines

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