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Journal ArticleDOI

Effect of Top-Relief and Rake Angles on the Gear Shaping Cutter Profile

01 Oct 1983-Vol. 197, Iss: 4, pp 249-254

AbstractGear shaping cutters are provided with top-relief and rake angles. As a result of this, the profile representing the cutting edge is modified. This paper deals with the method of obtaining the effective profile on the rack-type and pinion-type cutters for spur gears. Analysis of the effective profile shows that the effective profile of the rack-type cutter is actually a straight-sided tooth form with different pressure angle and tooth thickness at the reference (pitch) line. In the case of the pinion-type cutter, tooth thinning takes place and the effective profile could not be identified with any involute form.This paper also deals with the methods of correcting the cutter profile form so that profile close to the theoretical form can be obtained on grinding the rake face. This approach would be quite useful to the designers and manufacturers of the shaping cutters.

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Journal ArticleDOI
Abstract: 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.

1 citations


References
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Journal ArticleDOI
Abstract: 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.

8 citations