. American engineer . male formerfor clearance lietween the sheet and the former at all will govern the exact outside size of the flue sheet. Offset Firebox Sheets.—Another example of locomotive for-mers is shown in Fig. 5; this style of former is necessary to turna 6 in. flange up all around the sheet. Lugs are cast on theclamping former in order to locate the sheet so that the properamount of material may be left below the bend; after this opera-tion the female former is brought into action, turning up theflange around the sheet. Until a short time ago the practicewas to have the
. American engineer . male formerfor clearance lietween the sheet and the former at all will govern the exact outside size of the flue sheet. Offset Firebox Sheets.—Another example of locomotive for-mers is shown in Fig. 5; this style of former is necessary to turna 6 in. flange up all around the sheet. Lugs are cast on theclamping former in order to locate the sheet so that the properamount of material may be left below the bend; after this opera-tion the female former is brought into action, turning up theflange around the sheet. Until a short time ago the practicewas to have the female former follow the contour of the sheetso that the flange would be turned up all around at the same the advent of the offset sheet, however, it was found thatwhen using this method the surplus metal was forced to thebend near the middle, with the result that the sheet was doubledover on itself and sometimes tore out the corner when the largeamount of metal refused to pass through the formers at this. Fig. 5—Formers for Flanging and Forming Offset Firebox Sheets. May, 1912. ami:rica\ engineer. 229 point. To overcome this dilliculty the writer developed thestraight line female former shown in Fig. 5, which will turnup the flange on the lowest part of the sheet first and allow thesurphis metal to turn up along the ogee and escape at the highestpoint of the sheet which is pressed last, leaving a smooth andperfect flange. Guides are provided to hold tlie clamping formerand tlie former together wlien pressing the offset in tlie kept on liand so that various combinations will be available. Inall cases before sending the formers to the shops for use theblue prints should be marked with the proper length and style ofsupports to suit the strokes of the press under matter should not be left for the shops to do, as it willdelay the for Steel Cars.—An example of a steel car former l| -^ ^^ J op 1^ X
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectrailroa, bookyear1912
