Chapter 3 MIG/MAG welding - Saf-Fro

Legend for MIG-MAG welding:MIG: metal inert gasArc welding process with a consumable wire. Thiswire is transferred in the arc and the metal which isin a molten condition deposes itself in the moltenpool. All this is protected by an inert gas.MAG: metal active gasSame description as MIG but the protection gasis an active one. (CO2 or argon + CO2 mixture).MIG pulseThe current varies during welding, the powersource is imposing it a very precised “shape wave”.The pulse is above all used for stainless steel wiresand light alloys.Synergic MIGThe welding parameters are programmed in thepower source set for a common evolutionaccording to a predefined law. One single setting isneeded which facilitates the use of those machinesand improves the welding quality.2 times modeThe welding occurs by pulling the torch's trigger.It stops by loosening the trigger.Classical 4 times modeThe pre-gas occurs by pushing the trigger, afterwardsthe welding starts by loosening it then withthe next push on the trigger the welding stops andthe post-gas stays active until releasing the trigger.Spot modeThe power source starts to weld when the trigger ispushed, but the welding stops automatically after apre-set delay.Intermittance modeThis is a point mode which is repeatable. If thepush on the trigger is maintained, the welding willbe retaken after an other delay which is as well tobe regulated.Speed regulationThe welding wire spool is electronicaly regulatedwhich imposes a constant speed of the spool.Burn backTo solve the problem of wire stiching in the moltenpool on completion of the weld cycle.Soft startFirstly the wire advances slowly just till theshort-circuit point and the arc start; the chosenwelding speed is then set up.OPTI’systemWelding parameters optimization following needsof the welder (available only on OPTIMAG andOPTIPULS installations).A.N.D. (Arc Non Disruption)Device avoiding arc disruptions (available only onDIGI@PULS-DIGI@WAVE installations).Arc Progressive extinctionor crater fillerAllows correct finishing of the weld with thesuppression of the crater at the end of the weldthanks to a progressive extinction of the arc(DIGI@PULS-DIGI@WAVE) or by levels (on OPTIMAG).Protection against Ball-effectAt the end of the weld cycle in short circuit regime,this device avoids the formation of a ballat the end of the wire. This contribute greatly tothe arc-restriking (on DIGI@PULS-DIGI@WAVEinstallations or OPTIMAG).2002-0012000-0242000-5003Wire diameter in mmWire feedSteel and stainless steel Aluminium Cored wire Number ofBuilt-in0.6 0.8 1.0 1.2 1.6 0.8 1.0 1.2 1.6 2.4 0.8 0.9 1.0 1.2 1.6 2.4rollersWeight(kg)Name of product- - - - - - - - - - - - - 2 yes 27 SAXOMIG 171 C- - - - - - - - - - - 2 yes 29 PRESTOMIG 201 C- - - - - - - - - - - 2 yes 38.5 FILCORD 171 C- - - - - - - - - - - 4 yes 52 FILCORD 201 C- - - - - - - - - - - 4 yes/no 86 FILCORD 251 C / S- - - - - - - - - - 4 yes 71 FILCORD 203 C- - - - - - - - - - 4 yes 77 FILCORD 253 C- - - - - - - 4 yes 96 FILCORD 303 C- - - - - - - 4 yes 116 FILCORD 353 C- - - - - - - 4 no 81 FILCORD 303 S- - - - - - - 4 no 100 FILCORD 353 S- - - - - - 4 no 135 FILCORD 453 S- - - - - - 4 no 143 OPTIMAG 400 S MV / S W- - - - 4 no 200 OPTIMAG 500 S W- - - - - - - - 4 yes/no 101 SAFMIG 300 BLX S- - - - - - 4 yes/no 161 SAFMIG 400 BLX S / S W- - - - 4 no 201 SAFMIG 500 BLX S / S W- - - - - - - - 4 no 83 DIGI@PULS 320 / 320 W- - - - - - 4 no 91 DIGI@PULS 420 W- - - - - - - 4 yes 80 DIGI@WAVE 280- - - - - - 4 no 91 DIGI@WAVE 400 W- - - - 4 no 105 DIGI@WAVE 500 W35