Locomotive boiler construction; a practical treatise for boilermakers, boiler users and inspectors .. . is hooked up todifferent lengths and is attached by means of bolts intothe holes for the stay bolts. Whether rivets are driven by hand, or by machine,unless the sheets are well bolted together before riveting,there are apt to be some loose rivets. When these rivetsare detected, which may be frequent or only on rareoccasions, they must be taken out and new rivets put intheir place. It is not an uncommon thing to find looserivets in the water space frame and in the circumferentialseams. The ri
Locomotive boiler construction; a practical treatise for boilermakers, boiler users and inspectors .. . is hooked up todifferent lengths and is attached by means of bolts intothe holes for the stay bolts. Whether rivets are driven by hand, or by machine,unless the sheets are well bolted together before riveting,there are apt to be some loose rivets. When these rivetsare detected, which may be frequent or only on rareoccasions, they must be taken out and new rivets put intheir place. It is not an uncommon thing to find looserivets in the water space frame and in the circumferentialseams. The rivets in the water space frame being verylong, the amount of material of the rivet is not exactlyequal to the rivet hole, and therefore we have a looserivet. In the circumferential seam there is apt to be a 194 Removing rivets. slight difference in circumference between the fitting sur-face of the two sheets and this would mean that unlessthe sheets were drawn together very firmly, there wouldbe a small gap between the sheets. As one rivet afteranother is driven, each rivet pulling a certain amount. R The Derrtf-CoUard Cc,Figure 164Knocking out a countersunk head rivet. upon the sheet, there will be a time when the longestrivet will be relieved of its weight and we would have arivet to be taken out. Fig. 163 illustrates the method for removing a rivetwhich has an outside head. The punch P is set against i9S Furnace bearers. the head of the rivet and is hit several hard blows withthe sledge hammer. The head R will thus be removedby a failure of both shear and bending. The tit T of thepunch is now entered upon the rivet and the rivet punchedout of place. A rivet like the one in Fig. 164 is removed .A >
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Keywords: ., bookcentury1900, bookdecade1910, bookidlocomotivebo, bookyear1912
