. Railway mechanical engineer . uld be in place if jjos-sible. A ^ in. jjlate should Jje tacked to the lower side ofthe frame on which a foundation can be made to start theweld. This jjIate extends out on both sides of the frame thethickness of the reinforcement and is welded firmly to theframr at all points of ((intact including tlic edges. Tliis|)Iate forms a liase on which to start tlie weld. Iwo operators siiould be ciniijoyed, one on each side of RAILWAY MECHANICAL ENGINEER 96, No. 1 the frame. After the weld reaches the thickness of twoinches it should be hammered, this hammering t
. Railway mechanical engineer . uld be in place if jjos-sible. A ^ in. jjlate should Jje tacked to the lower side ofthe frame on which a foundation can be made to start theweld. This jjIate extends out on both sides of the frame thethickness of the reinforcement and is welded firmly to theframr at all points of ((intact including tlic edges. Tliis|)Iate forms a liase on which to start tlie weld. Iwo operators siiould be ciniijoyed, one on each side of RAILWAY MECHANICAL ENGINEER 96, No. 1 the frame. After the weld reaches the thickness of twoinches it should be hammered, this hammering to continue atintervals until the weld is finished. It is important that atno time during the process of the weld any part should be lessthan red hot. That is to say, the operator should keep thefinished part of the weld red hot at all times and when theweld is finished the entire weld should be brought up to aneven heat before jacks are removed. This will relieve anyinternal stress and decrease the possibility of future Fig. 3—Air Signal Valve CastingRepaired by Gas Weidlng For the amount of reinforcement to be applied referenceshould be made to Fig. 1 and the accompanying tables. Miscellaneous Welding and Building Up Jobs The possible uses of both gas and electric welding in rail-road shops are too numerous to mention and both processes
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectrailroadengineering
