. American engineer . ng all the time. Forgings made with the proper dies do nothave as much excess material to be machined ofif as hand forgedwork, resulting in a considerable saving in labor cost as well asin the cost of the material. J. W. Riley (L. V., Sayre. Pa.) :—The Lehigh Valley is mak-ing 1,500,000 grab irons to comply with the safety appliance Septkmukk. 1912. AMERICAN EX( il XEER. 447 requireim-iits. With the dies shown in Fig. 1, \vc can turn ends in 9 Imurs on a Uj-in. forging machine. It requiresone heat and two blows to make each end. fhe header usedfor the second blow
. American engineer . ng all the time. Forgings made with the proper dies do nothave as much excess material to be machined ofif as hand forgedwork, resulting in a considerable saving in labor cost as well asin the cost of the material. J. W. Riley (L. V., Sayre. Pa.) :—The Lehigh Valley is mak-ing 1,500,000 grab irons to comply with the safety appliance Septkmukk. 1912. AMERICAN EX( il XEER. 447 requireim-iits. With the dies shown in Fig. 1, \vc can turn ends in 9 Imurs on a Uj-in. forging machine. It requiresone heat and two blows to make each end. fhe header usedfor the second blow is provided with a projection that almostl>unches a hole through the end. With this it is estimated that350 ft. of 1 in. round iron is saved a day. When headingthe second end, the first one is placed on a button w-hich holds theiron in line, so that when bending it no twisting is necessary,.\fter the ends are formed they are trimmed, wlicn necessary,and puiuhid on a liammcr litted up for tliat jiurposc, a sliear. Fig. 3—Dies for Trailer Spring Hanger and Trailer Hanger;Chicago & North Western. blade being placed in the top hammer holder and a punch in tlieheader holder. thousand ends can be trimmed and punchedin 9 hours. They are bent cold on a power punch, whicli makesa bend at every stroke of the machine. The dies are made ofcarbon steel and 60,000 grab irons have been made on one setof dies without dressing. The headers are made of piston rodsteel which is hardened about like carbon steel. They requiredressing quite often. G. Creedon (B. & A., West Springfield, Mass.):—Dies usedon a 4-in. forging machine for making grease plugs for siderods are shown in Fig. 2. The plugs are made from l4-in.
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectrailroa, bookyear1912
