초록 ▼

In transverse flux induction heating of electrically conductive strip, conductors that cross the strip width are stacked, or connected, such that a multiple of the induced current flows across the strip width as compared to that which flows along the strip edges. Conductors across the width of the s

In transverse flux induction heating of electrically conductive strip, conductors that cross the strip width are stacked, or connected, such that a multiple of the induced current flows across the strip width as compared to that which flows along the strip edges. Conductors across the width of the strip and conductors along the edges of the strip are connected in series to insure that the current which flows in the conductors is everywhere the same. In the case of two stacked cross conductors, this gives an I2R heating of four times the heating across the strip width as compared to that along the strip edges.

대표청구항 ▼

In transverse flux induction heating of electrically conductive strip, conductors that cross the strip width are stacked, or connected, such that a multiple of the induced current flows across the strip width as compared to that which flows along the strip edges. Conductors across the width of the s

In transverse flux induction heating of electrically conductive strip, conductors that cross the strip width are stacked, or connected, such that a multiple of the induced current flows across the strip width as compared to that which flows along the strip edges. Conductors across the width of the strip and conductors along the edges of the strip are connected in series to insure that the current which flows in the conductors is everywhere the same. In the case of two stacked cross conductors, this gives an I2R heating of four times the heating across the strip width as compared to that along the strip edges. il and the supporting means, a movable, electric arc torch unit provided with a shielded electrically conductive wire, for operating the welding at said zone, the torch unit being attached to the framework and located between the two supporting means, substantially coaxial therewith, first torch moving means for moving the electric arc torch unit with respect to the framework along two different transversal directions, second torch rotating means for rotating the torch unit around an axis parallel to the axis extending between the two supporting means, a control unit connected to the first and second torch moving means, for controlling the movement of the electric arc torch unit in said transversal directions, over the zone to be welded, the control unit comprising: first controlling means for controlling a first displacement of the torch unit with respect to the framework substantially along the periphery of the zone to be welded, so that welding geometrical locations are read on said zone, by means of reading means connected to a memory unit, for memorizing said welding geometrical locations read on the first rail, and, second controlling means for automatically controlling a second displacement of the torch unit with respect to the framework substantially along the zone to be welded, within the limits of said reading and as a function of the welding geometrical locations, as memorized. 6. The robot of claim 5, wherein said supporting means rests upon and overlaps the first rail. 7. The robot of claim 6, wherein said supporting means extends outward from a side of the framework proximate said first rail, and wherein said framework is supported upon and between said first and second rails via said supporting means, said robot being free from contact with a ground surface supporting said rails. 8. The robot of claim 7, wherein said supporting means includes hooks over the first rail. 9. The robot of claim 7, wherein said supporting means includes at least one of hooks and wheels over the first rail. 10. A welding process for operating an electric arc welding on a first rail of a pair of parallel rails comprising a first rail and a second rail, each rail having a longitudinal axis, the process comprising the steps of: a) supplying an electric arc welding robot comprising a framework, a memory unit and a movable torch unit adapted to be provided with a welding wire, for welding a zone of the first rail, the framework comprising two gripping means for removably applying the robot to the first rail, substantially along the longitudinal axis thereof, the framework being disposed in a overhanging position with respect the gripping means, and the torch being located substantially coaxial with the two gripping means, b) disposing the framework between the rails, in a overhanging position with respect to the first rail and the gripping means and gripping the first rail with the gripping means, c) disposing the torch unit over the zone of the first rail to be welded, between the two gripping means, at a referencing geometrical location with respect to said zone, d) reading on said zone welding geometrical features thereof, for obtaining reading data, e) addressing the reading data to the memory unit, and f) having a determined welding program ran, as a function of said addressed reading data, the step of running comprising: providing the torch unit with the welding wire, supplying the torch unit with an electrical power, for arc welding the zone, as a function of said determined welding program and, displacing the torch unit in front of the zone to be welded, within the limits of said zone, in accordance with the read geometrical features thereof. 11. The process of claim 10 wherein, prior to step f) a type of welding wire the torch unit is to be provided with is selected among different choices and addressed to the memory, then the robot deduces therefrom: a feeding rate, for feeding the torch unit with sai