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    • Source: Fishplate

      • A fishplate, splice bar or joint bar is a metal or composites connecting plate used to bolt the ends of two rails into a continuous track. The name is derived from fish, a wooden reinforcement of a "built-up" ship's mast that helped round out its desired profile. The top and bottom faces taper inwards along their short dimensions to create an even alignment between the two rails when the fish plate is wedged into place by tightening its bolts during installation.
      In rail transport modelling, a fishplate is often a small copper or nickel silver plate that slips onto both rails to provide the functions of maintaining alignment and electrical continuity.


      History



      The device was invented by William Bridges Adams in May 1842, because of his dissatisfaction with the scarf joints and other systems of joining rails then in use. He noted that to form the scarf joint the rail was halved in thickness at its ends, where the stress was greatest. It was first deployed on the Eastern Counties Railway in 1844, but only as a wedge between the adjoining rails. Adams and Robert Richardson patented the invention in 1847, but in 1849 James Samuel, the engineer of the ECR, developed fishplates that could be bolted to the rails.


      In rail switches


      The moving blades of a railroad switch can be connected to the closure rails by looser-than-normal fishplates. This is called a heeled switch. Alternatively, the blade and closure rail can be a one-piece heel-less switch, with a flexible thinned section to create the moving heel.


      Electrical bonding



      When railway lines are equipped with track circuits, or where the line is electrified for electric traction, the electrical connection provided by fishplates is poor and unreliable and has to be supplemented by bonding wire spanning the joined rails fixed by spot welding or other means.


      = Welded joints

      =

      An improvement over fishplate rail connectors is directly bonding rails together using thermite or flash butt welding. In 1967, the Hither Green rail crash occurred on the Southern Region of British Railways when a rail fractured at its fishplate joint. The crash accelerated welded rail connections, with strict procedures on concrete and wooden sleepers.


      See also


      Rail lengths
      Tie plate


      References




      External links



      "Fish Plate" . New International Encyclopedia. 1905.
      Henry Williams Limited

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    Artikel Terkait "fishplate"

    Frame Weld- Fishplating - Miller Welding Discussion Forums

    27 Feb 2011 · I was asking for advice on applying that technique to the C-channel on my Ford Expedition. I heard "cut the bottom of the C-channel, jack it up pretty straight, then weld and fishplate." I don't know if that means fishplate the bottom of the C-channel, or the wider part, and how large it should be.

    Fish Plate Welds??? - Miller Welding Discussion Forums

    22 Apr 2010 · I am under the impression that it helps to prevent cracking by having the weld terminate out of line with the main weld. Like in the pictures in the link, the fillet weld runs past the end of the fishplate then curls away from the line of the weld. I don't know if cracking is what it prevents, but that’s my guess.

    Pictures of Boom repair... - Miller Welding Discussion Forums

    31 Mar 2010 · On larger booms you will not see my fishplate as I put the plate inside the boom, If it means cutting the crack out to fit the plate then so be it. Then I use the plug welding techique. Again fishplating booms kills resale. Only time this gets tricky is excavators tend to have ribs inside the booms.

    Welding boom cracks Case 580D backhoe HELP!

    "Fishplate" technically refers to a plate that is tapered on the ends, either angled or rounded, looks like a fish (without the tail), to reduce the stresses, provide a little flexibility, and reduce the possibility of a crack starting right at the end of the plate. See picture. The "super K" I was using yesterday had a ductile iron boom.

    Excavator Boom Busted - Miller Welding Discussion Forums

    23 Apr 2010 · You can see exactly why the boom failed. The add-on cylinder anchor plate look like it was welded right across the top and that little fishplate design is not really properly design and welded. Good luck with the project. I love doing this kind of job. Keep posting the progress.

    Cracked Backhoe Boom - Miller Welding Discussion Forums

    16 Jun 2008 · Got a project coming up ,customer called has a 320 cat trac-hoe with a cracked boom. Never welded on a boom, thinking inline of beveling the crack out and lo-hi it back together, then fishplate over the weld ,maybe 6 inches each side of the crack?Ithink it is cracked on three sides the way i understand,have not actually seen it yet.Anyone out there run in to this situation?

    welding crack on aluminum boat? - Miller Welding Discussion …

    Along the same lines, there's a difference in "schools of thought" as to how to weld out a fishplate. Some feel that the shape of the fishplate itself is enough to distribute the forces, whereas some feel that the addition of stringer's or tailing beads gives …

    Loader repair/gouging advice - Miller Welding Discussion Forums

    23 Jul 2013 · Then cover the new weld with a fishplate (google fishplate to learn about it) and weld the fish plate with 7018. Last edited by snoeproe ; 07-25-2013, 10:50 PM . Lincoln Idealarc 250

    Splicing I beam columns - Miller Welding Discussion Forums

    Well based on some of you guys comments and my guessing , would 1/4' plate on both sides be necessary and how long. I have some 1/4"x6" plate x 20'? What about? butt beam, weld 1 plate on one side, V out other side and weld. Then V out both flanges and weld, or weld 1/4" plate over joint at flanges? All plates cut to fishplate.

    Steering Box Frame Cracks - Miller Welding Discussion Forums

    04 Mar 2016 · I am in the process of repairing some frame cracks in the steering box area on my 1979 C-10 half ton pick up. I would like to get you guys thoughts on how you would approach this repair, specifically that rear lower hole. I plan to end drill and groove out the cracks deep enough to get full penetration to