Locomotive boiler construction; a practical treatise for boilermakers, boiler users and inspectors .. . ive, depends upon the steel, the pressure, the kind ofrivets and so on, and may vary anywhere from a few 185 Number that dies will drive. hundred to several thousand. As soon as the die getsout of shape, and always before it hits the sheet, it shouldbe sent back to the tool room and reshaped. Fig- 155 represents a flat lathe tool for shaping upa die for a button head rivet. The shape of the rivetheads is sometimes dependent upon what certainengineers consider correct and frequently the rivet
Locomotive boiler construction; a practical treatise for boilermakers, boiler users and inspectors .. . ive, depends upon the steel, the pressure, the kind ofrivets and so on, and may vary anywhere from a few 185 Number that dies will drive. hundred to several thousand. As soon as the die getsout of shape, and always before it hits the sheet, it shouldbe sent back to the tool room and reshaped. Fig- 155 represents a flat lathe tool for shaping upa die for a button head rivet. The shape of the rivetheads is sometimes dependent upon what certainengineers consider correct and frequently the rivet headis specified to the builder. In this case the dies wouldall be shaped up by some form of flat drill in the lathe. The head of the the rivet before being driven neednot be and in fact very rarely is the shape of the finishedrivet head which is required. Indeed many use rivetheads like Fig. 137 for all purposes where a button orother outside head is required. It is believed that theupsetting action, which is necessary to bring such a headinto a spherical form, improves the strength of the Tool Steel Figure 155Making a die for button head rivet. The rivets are almost universally made of wrought heads of steel ones for some reason seem to have atendency to snap off after the rivet is driven. Various methods are used for heating the of the large locomotive builders in this countryuse egg or nut coal with the air blast, while others, 186 Heating the rivets. especially in the far West, use oil almost entirely. Thecoal fire is usually arranged on the riveter platform quitenear the machine and sometimes is arranged with a pipe 10 20 30 40 50 60 70 80 90 100 110 120 130 140 150 TONS PRESSUftE ON THE DIE % \ 1 \ \ \ \ \ \ \ ft/ \ \ co V ^ Hi ->- IE \ % \, \ H C * 1 All Q - i!s i11 13B 1% TKt Derry Collard Co. Figure 156Pressure required for rivets. See page 188. for carrying off the gases. Too frequently, however,no provision for taking care of the
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Keywords: ., bookcentury1900, bookdecade1910, bookidlocomotivebo, bookyear1912
