. Railway mechanical engineer . rig. 3—Turning and Boring One Valve Packing Ring on First S = m-Automatic Machine (Fig. 4). Both of the above machines are operated simul-taneously and by one operator. The operations necessary to machine valve packing ringsare perfomied in the following order: Operation 1—Piece sawed from ring at groove (J^;iece sawed from 12-in. ring and 9/16-in. piece sawed from14-in. ring). Operation 2—Packing casting chucked in semi-automaticmachine with a 3/32-in. metal liner applied in opening. Operation 3—One side of casting (one ring) rough ma-. Fig. A—Cutting F
. Railway mechanical engineer . rig. 3—Turning and Boring One Valve Packing Ring on First S = m-Automatic Machine (Fig. 4). Both of the above machines are operated simul-taneously and by one operator. The operations necessary to machine valve packing ringsare perfomied in the following order: Operation 1—Piece sawed from ring at groove (J^;iece sawed from 12-in. ring and 9/16-in. piece sawed from14-in. ring). Operation 2—Packing casting chucked in semi-automaticmachine with a 3/32-in. metal liner applied in opening. Operation 3—One side of casting (one ring) rough ma-. Fig. A—Cutting First Ring from Tub and Facing Second Ring chined (includes inside surface and counterbore rough bored,face and outside surface rough turned), all of Oi>eration 3being performed simultaneously, as shown in Fig. 3. Operation 4—Same side as alx)ve, finishing cut (includesinside surface and counterbore bored to finished size, faceand outside surface turned to finished size), all of Operation4 being perfomied simultaneously. Of>eration 5—Casting removed from machine ready forsecond machine. Operation 6—Finished side of casting chucked in anothersemi-automatic machine, as shown in Fig. 4. ()j)eration 7—Other side of casting (one ring) rougluil(includes inside surface and counterbore rough bored, faicand outside surface rough turned, all of Ojieration 7 beini;I lerformed simultaneously. Ojxration S—Same side as above, finishing cut (includrsinside surface and counterbore bored to finished size, fanand outside surface turned to finished size), all of Oi^erati
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectrailroadengineering
