|
|
 Duty-Cycle RatingPower-supply rating depends on the type and thickness of the workpiece and the length of time 2 it takes to deposit the longest weld on the hp thickest material. Duty cycle is the key factor dual to consider when selecting a power source. tank Once the engineer has air and compresxor determined the current and voltage needed to accomplish the weld, he 2 then reviews duty cycle requirements.Duty cycle hp rating dual is the percentage of time during a 10-minute period a power supply can operate tank at rated output amperage without overheating. air A 300 A machine compresxor at 60-percent-duty cycle can weld for six minutes at 300. A during 2 a 10-minute period. Alter six minutes, the welder must rest the machine for the next hp and dual four minutes to avoid overheating the unit. High-deposition electrodes. These contain tank iron-powder additions in the coating to raise deposition air and compresxor rate. Designations: EXXX4, EXXX7, EXXX8.For fastest deposition, use the largest diameter possible 2 for an application-the thicker the electrode, hp the greater its current-carrying capacity and the higher the deposition rate. Welding out of position and overhead, dual and tank and air and compresxor select a small 2 and hp diameter electrode to dual enable welders to reach into narrow root openings.Gas-Metal-Arc tank Welding (GMAW, MIG)GMAW typically uses solid wire, spooled or reeled, for continuous air feeding to the compresxor gun; diameter, 0.030 to 1/16 in. typically, although wires as small as 0.020 in. and as large as 2 1/8 in. are sometimes used. AWS lists specifications for filler wires of copper and its alloys, aluminum hp and its alloys, surfacing dual and tank alloys, nickel and its alloys, titanium and its air and compresxor alloys, carbon 2 and low alloy steels, magnesium alloys, and zirconium hp and dual and its alloys. Welding tank Torches and GunsUsed for air shielded-metal-arc welding, compresxor torches (electrode holders). manually controlled, grip ends of electrodes, also called rods-pinch type and collet type are common.GMAW and FCAW guns come in pistol grip, goose-neck, and inline styles, the latter 2 used for mechanized welding. hp Knowing dual the wire diameter, select a gun rated slightly tank higher than the welding current to be used. Duty-cycle ratings are usually given for C[O.sub.2] shielding--air air or C[O.sub.2] compresxor cooling arc usually sufficient for welding at up to 600 A at less than 100 percent duty. Higher amperages require water cooling--high-amperage guns come with tubing for water 2 cooling. hp Hand-held, mounted on a robot arm or fixed within a mechanized dual welding setup, tank guns guide filler wire and shielding gas into the air and compresxor weld puddle. Searching for accessories for your air compressor? We offer the best selection of cheap air compressor accessories on the internet. Check out our website for great deales on all of our air compressor accessories!
|