Document 2JzYjr5Bq4mrmoj93Y5joknJ7

distributed Proper working clearance must be main tained to facibtate correct location for un loading If possible, cold trimmers should be designed to work on guide pins for proper ahgnment Padding, bending, or straightening equip ment is sometimes required to complete a forging This equipment can be made from a good grade of wear-resistant carbon, nickel steel Hot pad dies are usually made with an opening between the die faces so that the hot forging acts as a cushion Additional clearance should be provided in a hot pad or restnke die because the forging is con stantly cooling and shrinking Cold coin dies are made from high carbon, high chrome steels hardened to 62 to 64 Rock well C hardness The forging is corned cold For best result, either interlocking dies or dies with guide pins are used Additional safety measures such as magazine type load ers are sometimes made an integral part of the die for the operator's convenience The faces of the coining dies should be ground as smooth as possible No lubricant should be used because it may cause the forg ing to stick to one die face The opening between the dies is sometimes limited me chanically so that no more than one forging can be loaded at a time Bulldozers. The greatest danger in the operation of a bulldozer is the possibility of a workman's being caught between the dies There are several ways to decrease this haz ard A guard may be attached to the side of the moving head and travel with it past the stationary head, or telescoping rods or rails may be used to serve the same purpose The base plate can be notched out to leave room for the operator's leg The clutch should be kept in good order so that the machine will not repeat The power transmitting mecha nisms should be guarded Cold heading and similar machines should have screen shields to protect workers from flying pieces Relief springs should be guarded to prevent the bolts and nuts from being thrown out m case of breakage Bolt headers and nveting machines should have treadle guards to prevent accidental operation The machines should be stopped and blocked before dies are changed or ad justments are made Hot saws should be provided with tanks of water placed below the saws and 8-in sheet metal guards positioned to stop the flying sparks References Forging American National Standards Institute, 1430 Broadway, New York, N Y 10018 Safety Requirements for Forging, B24 1 National Safety Council, 444 North Michigan Ave, Chicago, 111 60611 Forging Safety Manual Guards Illustrated Industnal Data Sheets Cold Shearing Billets and Bars, 557 Handling Materials m the Forgmg Industry, 551 Handling Steel Plate for Fabrication, 565 Mechanical Forging Presses, 560 Method of Locking Out Electric Switches, 237 Setup and Removal of Forging Hammer Dies, 467 Steam Drop Hammers, 450 Upsetters, 466 United Auto Workers, 8000 E Jefferson Ave, Detroit, Mich 48214 (General ) 945