16-10-1945 дата публикации
Номер: GB572612A
Автор:
572,612. Grinding toothed face clutches. ABBEY, A. (Gleason Works). Sept. 8, 1943, No. 14755. [Class 60] [Also in Groups XXII and XXIV] A toothed face clutch member 20 has teeth formed so that opposite sides of spaced teeth lie in common surfaces of revolution. The teeth may be cut with a face mill cutter 30, Figs. 3 and 4, having outside cutting edges 31 and arranged so that sides 23a, 24b of two spaced teeth 22a, 22b are cut simultaneously. After one side of a pair of teeth has been cut, the cutter is removed from the work, the latter is indexed one tooth pitch, and a second cut is made. The process is repeated until all the teeth are completed. The teeth of the companion clutch half 21 may be cut with a face mill cutter having inside cutting edges. The radii of the curved sides of the two sets of teeth may be the same or different. The teeth may be of constant depth from end to end and the cutting tool may round off the tops and the bottoms of the teeth during the cutting operation. The feeding movement of the cutter may be inclined both to the axes 32, 28 of the cutter and the work. The side tooth faces may be of positive pressure angle, Figs. 2 and 4, or of zero pressure angle. The axes of the cutter and work may be parallel to one another, or as shown in Fig. 27, the axes 222, 236, may be mutually inclined. In the latter case the direction of feed 237 is inclined to both axes 222, 236, and the root lines 243 of the tooth spaces will be inclined to the pitch line 240. Figs. 10 and 11 show a method of chamfering the teeth. A face mill cutter 85 has outside cutting edges 86 of concave profile and has its axis 87 inclined to the root plane 88. The clutch members may be used in a releasable clutch or they may be coupled together by bolts. Oscillatory cutting tools or grinding- wheels may be used instead of face mill cutters.
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