An electromagnetic apparatus for active intervention to a shape of a molten pool is provided. In the present invention, a workpiece is placed on stepped surfaces of a test bench. Upon power on, a metal rod rotates to generate a toroidal magnetic field centered on the metal rod, and the toroidal magnetic field acts on the molten pool to generate an induced current. The induced current generates Lorentz force under the action of the magnetic field, which acts perpendicularly on an outer surface of the molten pool, thereby changing the height, depth and width of the molten pool, and finally realizing the active intervention to the molten pool shape.

The system comprises a mold (6) which in turn comprises: a weld cavity (4), housings (5) for the components (1) to be welded, a crucible-funnel (7) communicated with the weld cavity (4) for housing filling material (3), at least one additional cavity (10) for housing an exothermic mixture (2); and an inner shell (11) that separates the crucible-funnel (7) and the at least one additional cavity (10) to transmit heat produced in the exothermic reaction from the additional cavity (10) to the crucible-funnel (7). It allows the exothermic mixture to be isolated to avoid contact with the filling material (3) and to prevent it from reaching the weld cavity (4). The system can further include a first filler (13) and a second filler (16), arranged to be mounted over the mold (6) for introducing the filling material (3) and the exothermic mixture (2), respectively.

The system comprises a mold (6) which in turn comprises: a weld cavity (4), housings (5) for the components (1) to be welded, a crucible-funnel (7) communicated with the weld cavity (4) for housing filling material (3), at least one additional cavity (10) for housing an exothermic mixture (2); and an inner shell (11) that separates the crucible-funnel (7) and the at least one additional cavity (10) to transmit heat produced in the exothermic reaction from the additional cavity (10) to the crucible-funnel (7). It allows the exothermic mixture to be isolated to avoid contact with the filling material (3) and to prevent it from reaching the weld cavity (4). The system can further include a first filler (13) and a second filler (16), arranged to be mounted over the mold (6) for introducing the filling material (3) and the exothermic mixture (2), respectively.

A mold clamping system for exothermic reaction welding adapted to be power-operated by a power device, the combination comprising a first member adapted to support a first mold portion; a second member adapted to support a second mold portion; and a drive mechanism, adapted to be coupled to the power device, coupled to at least one of said first and second members and capable of moving the first and second members between a first position, in which the first and second mold portions are spaced apart, and a second position, in which the first and second mold portions are engaged, upon actuation of the power device in a first and a second direction, respectively.

A mold clamping system for exothermic reaction welding adapted to be power-operated by a power device, the combination comprising a first member adapted to support a first mold portion; a second member adapted to support a second mold portion; and a drive mechanism, adapted to be coupled to the power device, coupled to at least one of said first and second members and capable of moving the first and second members between a first position, in which the first and second mold portions are spaced apart, and a second position, in which the first and second mold portions are engaged, upon actuation of the power device in a first and a second direction, respectively.

A system, apparatus, and method in which an induction head is used to impinge an electromagnetic force field on a molten metal bead to shape same, e.g., to flatten same.

A system, apparatus, and method in which an induction head is used to impinge an electromagnetic force field on a molten metal bead to shape same, e.g., to flatten same.

A backing plate for includes a synthetic diamond portion configured to abut a joint region during a welding operation. A welding clamp includes a plurality of clamping blocks, each including a synthetic diamond portion configured to abut a pipe joint region during a welding operation. Because the backing plate and clamping block each include a synthetic diamond portion, the backing plate and clamping block can withstand high welding temperatures without damaging or diminishing the quality of the weld.

A backing plate for includes a synthetic diamond portion configured to abut a joint region during a welding operation. A welding clamp includes a plurality of clamping blocks, each including a synthetic diamond portion configured to abut a pipe joint region during a welding operation. Because the backing plate and clamping block each include a synthetic diamond portion, the backing plate and clamping block can withstand high welding temperatures without damaging or diminishing the quality of the weld.

A welding guide has a plate having a first section and a second section that are bent along a bend line to form a right angle. Rollers are attached to the first and second sections and a positioning member having at least one aperture is attached to the second section. A top edge and a bottom edge of the first and second section have notches.