. Railway mechanical engineer . - clear in the illustration. The tvpe ofmachine used here lends itself admirably to this class ofwork. Its ram reaching forward through the casting andcutting on the return stroke permits of a hea^-^- feed anddeep cuts without chatter and the springing of the tool awayfrom the surface of the work, .^s shown here, tlie cuttinguiol is removing the metal with a depth of cut of about J in. and a feed of 3/32 to Ys in. per stroke of ram, whichmeans a verj reasonable length of time for completing the-cmi-circular seat for the brass. Running say at 15 cora- ilete forwa
. Railway mechanical engineer . - clear in the illustration. The tvpe ofmachine used here lends itself admirably to this class ofwork. Its ram reaching forward through the casting andcutting on the return stroke permits of a hea^-^- feed anddeep cuts without chatter and the springing of the tool awayfrom the surface of the work, .^s shown here, tlie cuttinguiol is removing the metal with a depth of cut of about J in. and a feed of 3/32 to Ys in. per stroke of ram, whichmeans a verj reasonable length of time for completing the-cmi-circular seat for the brass. Running say at 15 cora- ilete forward and return strokes per minute, the actual rate Fig. 1—Planing Driving Boxes on a Draw Cut Shaper steps in the performance of the work are well shown in theillustrations. Fig. 1 shows a pair of 9 in. by 12 in. drivinL;boxes set up in the chuck on a Morton draw cut shaptr. \: k <■ P 1 % f ^^ W^ .rz , ^^ ^ V 1 Fig. 3—Planing the Brass f operation under a 3 to 1 ratio for the noncutting stroke■Duld work out at 25 feet per minute. PL.^XIXG TILE Ihe methods followed in shaping the outside of theIfasses on the same type of machine is illustrated by and 3. Here the work is shown mounted between fixturesin a rotary clutch which turns automatical!)-, the amountof the desired feed upon the completion of each stroke of the-JKiper ram. Fig. 2 shows the convenient method of pick-ing up the w^ork with the sling and hoist to place it in and the other photograph represents the planingoperation nearing completion. The shaper is operated atthe rate of 20 complete strokes a minute with a feed of 3/16in. and a depth of cut ranging from 4 to ■/& in. So thefinishing of the external surface requires only a few mo-ments and the setting and removal of the work causes buta brief delay between successive the interior of the
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectrailroadengineering
