Locomotive boiler construction; a practical treatise for boilermakers, boiler users and inspectors .. . ning machine. The holes having been drilled in theflange, it is readily clamped to the bed of the machine byusing these holes. D is a distance block which is placedunderneath the flange. The flange is marked front andback with a center punch mark. A pointer is placed on 164 Dome bases. the tool post and the bed run back and forth, the flangebeing bumped around so that its center line will beparallel with the center of the bed. It is now clamped inposition. T is the planer tool which is rigge
Locomotive boiler construction; a practical treatise for boilermakers, boiler users and inspectors .. . ning machine. The holes having been drilled in theflange, it is readily clamped to the bed of the machine byusing these holes. D is a distance block which is placedunderneath the flange. The flange is marked front andback with a center punch mark. A pointer is placed on 164 Dome bases. the tool post and the bed run back and forth, the flangebeing bumped around so that its center line will beparallel with the center of the bed. It is now clamped inposition. T is the planer tool which is rigged upon arotary head. The radius R of the point of the tool ismade to suit the boiler. A cut is now started beginningat one end. The rotary head of the planing machine isprovided with a feed mechanism to move the tool radiallyacross the flange. Heavy vertical milling machines are gradually beingintroduced by nearly all the locomotive shops. Thesemachines are almost universally used for milling thecorners of water space frames. D, Fig. 134, is thediameter of one of these milling cutters. The sheet is. Figure 133 The Derry-Collard Co, Machining dome base to fit boiler. clamped upon the table of the vertical milling machineand the table is run back and forth so as to mill the lineA, the radius of the cutter being the same as the radiusof the inside corner. The cutter is now run down alongthe line B and a cut is taken off of sufficient length to 165 Milling machines for boiler work. start or stop the planer tool as the case may be. Themetal at S is slotted out after the milling process is com-plete. The frame is now shifted on the bed of the mill-ing machine and the center C of the outside corner ismade to coincide with the center line of the table. Thiscan be done in several ways, one of which is to put ablock of wood at C and find the center on it, and thenhaving a conical shaped tool to put in the spindle. Thespindle is lowered and the table shifted until the center
Size: 2191px × 1140px
Photo credit: © The Reading Room / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecade1910, bookidlocomotivebo, bookyear1912
