Grinding Methods of Gears with Circular-Arc Tooth-Curve

概要

論文の詳細を見る
Gears with circular-arc tooth-curve can easily be ground with the cup-shaped grinding wheel and a desirable crowning can readily be given to the tooth surface. The gear grinding machine can be of the simplest construction. Further, it can grind parallel-depth toothed spiral bevel-and hypoid-gears theoretically correctly with great ease. Therefore, high precision, good tooth-bearing gears can be made at the first setting without any trial cutting. The parallel-depth tooth system should be adopted especially when small numbers of various gears are to be produced. However, since the cup-shaped grinding wheel and the tooth surface being ground contact as if to envelop each other, the arc of contact of the abrasive grain is long and the cooling and flushing effects of the grinding fluid cannot be achieved sufficiently. Consequently, there is a fear of burning of the tooth surface. By the addition of a small revolving motion (r=0.5 mm, n=60 rpm) to the shaft of the grinding wheel, intermittent grinding is effected, where the grinding fluid flushes and cools the grinding region sufficiently, and the grinding horsepower decreases remarkably because of the decrease of grinding friction. Thus, the grinding efficiency is markedly increased. Even the plunge grinding, or the so-called Formate Grinding, can be performed successfully.
一般社団法人日本機械学会の論文