. Il giornale ferroviario stradale . il metodo idraulicoun foro conico è forato nella base della rotaia mediante il punzone idraulico illustrato qui, che ha una potenza indicatadi 100 tonnellate, l'asse del foro essendo ad angolo retto alla superficie superiore della base della rotaia, mentre l'estremità piccola delforo è al di sotto. Il foro è pulito, con pareti luminose e trasparenti, e un equipaggio di un meccanico e un assistente può perforare 200 fori al giorno sufficienti per 100 legami, supponendo che non vi sia alcuna interferenza materiale dal traffico. La forma di legame utilizzata è quella delle aziende di tipo protetto L-3, con tre crimpature o rubinetti i.
1544 x 1618 px | 26,1 x 27,4 cm | 10,3 x 10,8 inches | 150dpi
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. The Street railway journal . he hydraulic methoda tapered hole is punched in the base of the rail by thehydraulic punch illustrated herewith, which has an indicatedpower of 100 tons, the axis of the hole being at right angleto the top surface of the rail base, while the small end of thehole is underneath. The hole is clean, with bright, clearwalls, and a crew of one mechanic and one helper can punch200 holes per day sufficient for 100 bonds, assuming thereis no material interference from traffic. The form of bond used is the companys well-knownProtected type L-3, with three crimps or tucks in thebody portion to provide flexibility. The company estimatesthat this bond, when straight, should be made il/2 ins. longerthan the final set length to provide the proper flexibility.The terminal heads of the bond are beveled to compensatefor the tapered shape of the rail base and to give the com-pressing tool firm hold on the copper and a bearing under-neath equivalent to a right angle with the axis of the com-pressing ram.. THE COMPRESSOR USED HYDRAULIC PUNCH FOR PRE-TO ATTACH THE BOND PARING HOLES IN RAIL An hydraulic compressor is used in attaching the bond.It has an indicated power of 35 tons, and is self aligning onthe rail, so as to permit the compressing ram to operate ina line parallel with the axis of the bond terminal. Thebeveled shape of the bond head gives the tool a flat andsolid grip on the terminal. The hole for the terminal beingpunched tapered with the small aperature underneath, thecompressing ram forces the copper down against the taperuntil flush with the rail, producing a dry contact in the first instance, and absolutely sealing the connection so that itis moisture proof. This operation so densifies and kneadsthe copper into close relation with the sides of the hole thatthe union cannot be ruptured by any action in service. Withthis compressing tool, a crew of two men can apply 300terminals, or 150 bonds per day, if there is no interferencefrom traffic.
