Locomotive boiler construction; a practical treatise for boilermakers, boiler users and inspectors .. . The pressure required to drive various size rivets isdependent on the diameter of the rivet. Most hydraulicmachines are arranged for three pressures, and givepressures at the dies according to the size and capacity ofthe machine about as follows: ist — 25 — 50 — 75 Tons2nd — 33 — 67 — 100 3rd — 41 — 83 — 125 4th — 50 — 100 — 150 Machines of the latter capacity have recently beenfurnished and are intended for very large rivets. Fig. 156 shows the pressure which is required forthe rivets. The
Locomotive boiler construction; a practical treatise for boilermakers, boiler users and inspectors .. . The pressure required to drive various size rivets isdependent on the diameter of the rivet. Most hydraulicmachines are arranged for three pressures, and givepressures at the dies according to the size and capacity ofthe machine about as follows: ist — 25 — 50 — 75 Tons2nd — 33 — 67 — 100 3rd — 41 — 83 — 125 4th — 50 — 100 — 150 Machines of the latter capacity have recently beenfurnished and are intended for very large rivets. Fig. 156 shows the pressure which is required forthe rivets. The curve is plotted for a fibre stress uponthe area of the head of the rivet of sixty thousand pounds Pressure required for riveting. to the square inch. It will be seen from this figure thatthe pressures of the common size rivets are as follows:y2 Inch rivets require 18 Tons H u it I 26 H a it I 36 % it tt t 1 48 I (( it I 63 i% a it I 95 irt it it t 1 114 1/2 it a ( 135 Fig. 157 shows a riveting machine which can be seenin a number of locomotive shops. This machine is flush. Figure 157An ordinary riveter for general work. The Derry Collard Co. at T and the gap G is from thirty-six to forty-eightinches. This machine admits of a good part of the workof the locomotive boiler but does not lend itself to gettingin corners such as close places around a throat sheet,dome, etc. For this reason we find in some shops a more 189 Vauclain flush bottom riveter. improved type of machine shown in Fig. 158. This ma-chine is also flush at T but has a long forged horn Hextending out from the top slide of the cylinder. Withthis machine one is able to get into many small placeswhich would be impossible on the machine shown in Fig.
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Keywords: ., bookcentury1900, bookdecade1910, bookidlocomotivebo, bookyear1912
