Welding Processes |
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acetylene aluminium application arc length arc voltage arc welding argon burn-off rate butt welding capacitor carbon cathode characteristic clamps contact resistance copper crater curve deformation diameter diffusion effect elec electric electro-slag welding electrode wire electron beam electron beam welding energy equipment filler films flame flash welding flow flux frequency friction welding fused fusion gas metal-arc gas-shielded give half cycle hydrogen ignitrons increase indenter inert-gas interface joined joint machines manual material mechanical melting metal transfer metal-arc welding method mild steel nozzle nugget open circuit voltage oxide oxygen penetration plasma plate power source pressure welding projection welding re-ignition reduced resistance welding result seam welding sheet shielding short circuit slag spot welding stud welding submerged-arc welding supply surface technique temperature thermal thickness torch transformer trode tube tungsten tungsten-arc welding velocity weld bead weld metal weld pool welder welding current welding process welding speed wire-feed workpiece
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Page 154 - The laser is a device which when irradiated by light from an intense source is capable of amplifying radiation in certain wavebands and emitting this as a coherent parallel beam in which all waves are in phase. This beam can travel long distances without attenuation and may be focused through lenses to produce spots in which the energy density is equalled only by the electron beam.