A gear-shaping process is used to cut cylindrical gears, both external and internal, with a pinion type of cutter. However, certain ‘inherent errors’ are present in the process which limit the range of the number of teeth on the gear to be cut. This paper deals with the analysis of inherent errors and suggests guidelines to avoid such errors, taking into account the effect of tip-relief angle © 1983 Taylor &amp; Francis Group, LLC.

Shunmugam M S

Department of Mechanical Engineering

Narayanan S. Srinivasan

GEAR CUTTING

Mathematical models

Gear manufacture

IIT Madras is a public technical and research university located in Chennai, Tamil Nadu. Founded in 1959, it is recognised as an Institute of National Importance.

IIT Madras has been ranked as the top engineering institute in India for four years in a row by the National Institutional Ranking Framework of the MHRD

It currently offers undergraduate, postgraduate and research degrees across 16 disciplines in Engineering, Sciences, Humanities and Management. About 596 faculty belonging to science and engineering departments and centres of the Institute are engaged in teaching, research and industrial consultancy.

IIT Madras

Limiting conditions in a gear-shaping process

International Journal of Production Research

In gear generation processes, the involute profile of the gear is obtained as an envelope of the successive cuts made by the flank of the generating tool. The irregularities of the profile thus generated limit the quality of the gear. This paper reports the minimum achievable quality based on the maximum theoretical height of the irregularity for the involute spur gears. © 1988, All rights reserved.

International Journal of Machine Tools and Manufacture

Minimum achievable quality of involute gears in generation processes

Gear shaping cutters are provided with top-relief and rake angles to facilitate effective cutting. Due to this, the profile representing the cutting edge (effective profile) is altered. This paper outlines a method of obtaining the effective profile and its deviations from the theoretical involute form required. This paper also deals with a method that modifies the pressure angle, while maintaining zero deviation at the reference circle, so that the effective profile closer to the theoretical form is obtained after grinding the rake face. The Golden section optimization method is used to get the optimum value of the modified pressure angle. The effect of regrinding on the profile error of the cutting edge is also brought out. The method suggested in this paper will be useful to the designers and manufacturers of gear shaping cutters. © 1988, All rights reserved.

Minimisation of error on the effective profile of pinion type gear shaping cutters

During the shaping process, the profile generated on the internal gear deviates from the theoretical profile even when the difference between the number of teeth on the gear and the cutter is large. This paper describes a method for simulating the shaping process while cutting the internal gear. For the first time, quantitative evaluation of profile deviation has been made possible by this approach. The results are adequately verified by experiments. A thorough analysis has been carried out on the simulated profiles and suggestions are made to reduce the deviation from the theoretical profile. © 1982.

International Journal of Machine Tool Design and Research

Profile deviations in internal gear shaping

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Hill, Arthur, (11 Jan. 1858–25 April 1927), Chief Engineer for Irrigation (retired), Bombay Presidency

Journal	International Journal of Production Research
ISSN	00207543
Open Access	No