Arc welding or cutting

BPERFORMING OPERATIONS TRANSPORTING B23Machine tools B23KSOLDERING OR UNSOLDERING WELDING CLADDING OR PLATING BY SOLDERING OR WELDING CUTTING BY APPLYING HEAT LOCALLY

B23K9/00Arc welding or cutting

B23K9/0008Welding without shielding means against the influence of the surrounding atmosphere B23K9/0017using more than one electrode B23K9/0026specially adapted for particular articles or work B23K9/0035of thin articles B23K9/0043Locally welding a thin plate to a thick piece B23K9/0052Welding of pipe panels B23K9/0061Underwater arc welding B23K9/007Spot arc welding B23K9/013Arc cutting, gouging, scarfing or desurfacing B23K9/0135Arc saw cutting B23K9/02Seam welding Backing means Inserts B23K9/0203Inserts B23K9/0206of horizontal seams in assembling vertical plates, a welding unit being adapted to travel along the upper horizontal edge of the plates B23K9/0209of non-horizontal seams in assembling non-horizontal plates B23K9/0213Narrow gap welding B23K9/0216Seam profiling B23K9/022Welding by making use of electrode vibrations B23K9/025for rectilinear seams B23K9/0253for the longitudinal seam of tubes B23K9/0256for welding ribs on plates B23K9/028for curved planar seams B23K9/0282for welding tube sections B23K9/0284with an electrode working inside the tube B23K9/0286with an electrode moving around the fixed tube during the welding operation B23K9/0288for welding of tubes to tube plates B23K9/032for three-dimensional seams B23K9/0325helicoidal seams B23K9/035with backing means disposed under the seam B23K9/0352the backing means being movable during the welding operation B23K9/0354the backing means being expandable B23K9/0356the backing means being a tape or strip B23K9/0358the backing means being a ring or sleeve B23K9/038using moulding means B23K9/04Welding for other purposes than joining B23K9/042Built-up welding on planar surfaces B23K9/044Built-up welding on three-dimensional surfaces B23K9/046on surfaces of revolution B23K9/048on cylindrical surfaces B23K9/06Arrangements or circuits for starting the arc B23K9/067Starting the arc B23K9/0671by means of brief contacts between the electrodes B23K9/0672without direct contact between electrodes B23K9/0673Ionisation of the arc gap by means of a tension with a step front (pulses or high frequency tensions) B23K9/0675Ionization of the arc gap by means of radiation or particle bombardtent B23K9/0676Ionization of the arc gap by means of heating B23K9/0677Ionization of the arc gap by means of a contact piece disposed between the electrodes B23K9/0678Ionization of the arc gap by means of an auxiliary arc B23K9/073Stabilising the arc B23K9/0731Stabilising of the arc tension B23K9/0732Stabilising of the arc current B23K9/0734Stabilising of the arc power B23K9/0735Stabilising of the arc length B23K9/0737Stabilising of the arc position B23K9/0738Stabilising of the arc by automatic re-ignition means B23K9/08Arrangements or circuits for magnetic control of the arc B23K9/09Arrangements or circuits for arc welding with pulsed current or voltage B23K9/091characterised by the circuits B23K9/092characterised by the shape of the pulses produced B23K9/093the frequency of the pulses produced being modulatable B23K9/095Monitoring or automatic control of welding parameters B23K9/0953using computing means B23K9/0956using sensing means B23K9/10Other electric circuits therefor Protective circuits Remote controls B23K9/1006Power supply B23K9/1012characterised by parts of the process B23K9/1018Improvements of the cos (phi) of arc welding installations B23K9/1025Means for suppressing or reducing DC components in AC arc welding installations B23K9/1031Reduction of the arc voltage beneath the arc striking value B23K9/1037Means preventing crater forming at the extremity of the seam B23K9/1043characterised by the electric circuit B23K9/105by using discharge tubes or mechanical contactors B23K9/1056by using digital means B23K9/1062with computing means B23K9/1068Electric circuits for the supply of power to two or more arcs from a single source B23K9/1075Parallel power supply B23K9/1081Arc welding by means of accumulated energy B23K9/1087Arc welding using remote control B23K9/1093Consumable electrode or filler wire preheat circuits B23K9/12Automatic feeding or moving of electrodes or work for spot or seam welding or cutting B23K9/121Devices for the automatic supply of at least two electrodes one after the other B23K9/122Devices for guiding electrodes B23K9/123Serving also as contacting devices supplying welding current to an electrode B23K9/124Circuits or methods for feeding welding wire B23K9/125Feeding of electrodes B23K9/126Controlling the spatial relationship between the work and the gas torch B23K9/127Means for tracking lines during arc welding or cutting B23K9/1272Geometry oriented B23K9/1274Using non-contact, optical means B23K9/1276Using non-contact, electric or magnetic means B23K9/1278Using mechanical means B23K9/133Means for feeding electrodes B23K9/1333Dereeling means B23K9/1336Driving means B23K9/14making use of insulated electrodes B23K9/142Drag welding, the arc length being determined by an insulated layer between the welding electrode and the welding spot or seam B23K9/145the insulated welding electrode being laid along the seam B23K9/147the insulated welding electrode resting with one extremity on the workpiece B23K9/16making use of shielding gas B23K9/162making use of a stationary fluid B23K9/164making use of a moving fluid B23K9/167and of a non-consumable electrode B23K9/1675making use of several electrodes B23K9/173and of a consumable electrode B23K9/1735making use of several electrodes B23K9/18Submerged-arc welding B23K9/182making use of a non-consumable electrode B23K9/184making use of several electrodes B23K9/186making use of a consumable electrodes B23K9/188making use of several electrodes B23K9/20Stud welding B23K9/201of the extremity of a small piece on a great or large basis B23K9/202by means of portable equipment B23K9/203of cooling fins B23K9/205Means for determining, controlling or regulating the arc interval B23K9/206with automatic stud supply B23K9/207Features related to studs B23K9/208Ferrules B23K9/22Percussion welding B23K9/23taking account of the properties of the materials to be welded B23K9/232of different metals B23K9/235Preliminary treatment B23K9/24Features related to electrodes B23K9/26Accessories for electrodes B23K9/28Supporting devices for electrodes B23K9/282Electrode holders not supplying shielding means to the electrode B23K9/285Cooled electrode holders B23K9/287Supporting devices for electrode holders B23K9/29Supporting devices adapted for making use of shielding means B23K9/291the shielding means being a gas B23K9/293using consumable electrode-rod B23K9/295using consumable electrode-wire B23K9/296using non-consumable electrodes B23K9/298the shielding means being a powder B23K9/30Vibrating holders for electrodes B23K9/32Accessories B23K9/321Protecting means B23K9/322Head protecting means B23K9/323Combined coupling means B23K9/324Devices for supplying or evacuating a shielding or a welding powder B23K9/325Devices for supplying or evacuating shielding gas B23K9/326Purge gas rings, i.e. devices for supplying or evacuating shielding gas inside of hollow or tubular articles B23K9/327Means for transporting supplies B23K9/328Cleaning of weld torches, i.e. removing weld-spatter; Preventing weld-spatter