Disclosed are methods of forming an impulse weld in a stack comprising a plurality of metal layers. Also disclosed herein are welded products exhibiting lower electrical resistivity when compared to an electrical resistivity of a substantially identical reference stack that was not yet welded. Also disclosed herein are systems for making such welded products.

A method of assembling a first part (1) with a second part (2) having at least one crimping lip (4), a crimping anvil (3) and a crimping groove (9) designed to accept an edge (10) that is to be crimped belonging to the first part, in which method the edge that is to be crimped is introduced into the crimping groove and magnetic crimping is performed by applying to the crimping lip a magnetic field that is designed to bend the crimping lip over and close the crimping groove onto the edge that is to be crimped, characterized in that the crimping anvil has at least one inclined portion.

A method of assembling a first part (1) with a second part (2) having at least one crimping lip (4), a crimping anvil (3) and a crimping groove (9) designed to accept an edge (10) that is to be crimped belonging to the first part, in which method the edge that is to be crimped is introduced into the crimping groove and magnetic crimping is performed by applying to the crimping lip a magnetic field that is designed to bend the crimping lip over and close the crimping groove onto the edge that is to be crimped, characterized in that the crimping anvil has at least one inclined portion.

The present invention relates to a polysilicon filament manufacturing device, and more specifically, to a polysilicon filament binding device for manufacturing a polysilicon filament having a desired length by connecting polysilicon fragments cut from damage, etc. The present invention provides a polysilicon filament binding device comprising: a body part having a barrel-shape; a guide part provided inside the body part, guiding incoming polysilicon fragments; and a main light source for heating the binding surfaces of the polysilicon fragments.

The present invention relates to a polysilicon filament manufacturing device, and more specifically, to a polysilicon filament binding device for manufacturing a polysilicon filament having a desired length by connecting polysilicon fragments cut from damage, etc. The present invention provides a polysilicon filament binding device comprising: a body part having a barrel-shape; a guide part provided inside the body part, guiding incoming polysilicon fragments; and a main light source for heating the binding surfaces of the polysilicon fragments.

An assembly method between a part made of metal material and a part made of organic matrix composite material, said method having a step of providing two parts, each including a surface to be welded, and the surface to be welded of said composite part is made up, at least partially, of an exposed portion of at least one metal insert which is partially embedded in said composite part; positioning said surfaces to be welded opposite and separated from each other; and projecting, at high speed, the surface to be welded of the metal part or the exposed portion of the metal insert, onto one another, to obtain high-speed clamping to one another and to obtain a weld between the exposed portion of the metal insert of the composite part and the complementary portion of the surface to be welded.

An assembly method between a part made of metal material and a part made of organic matrix composite material, said method having a step of providing two parts, each including a surface to be welded, and the surface to be welded of said composite part is made up, at least partially, of an exposed portion of at least one metal insert which is partially embedded in said composite part; positioning said surfaces to be welded opposite and separated from each other; and projecting, at high speed, the surface to be welded of the metal part or the exposed portion of the metal insert, onto one another, to obtain high-speed clamping to one another and to obtain a weld between the exposed portion of the metal insert of the composite part and the complementary portion of the surface to be welded.

An apparatus for applying a magnetic pressure to a work piece includes an inductor configured to be disposed in proximity to the work piece and a controller electrically connected to the inductor and configured to control a supply of electrical power in order to output a first voltage over a selected frequency range to determine a frequency that provides a maximum current or a frequency that provides a current within a selected range of the maximum current to the inductor.

An apparatus for applying a magnetic pressure to a work piece includes an inductor configured to be disposed in proximity to the work piece and a controller electrically connected to the inductor and configured to control a supply of electrical power in order to output a first voltage over a selected frequency range to determine a frequency that provides a maximum current or a frequency that provides a current within a selected range of the maximum current to the inductor.

A method for installing a tool in a downhole system including running the tool to a target location within a tubular structure, creating a magnetic pulse, and urging the tool toward the tubular structure at a minimum velocity of 200 meters per second with the magnetic pulse. A method for actuating a downhole tool including creating a magnetic pulse, coupling the magnetic pulse to a workpiece and moving the workpiece with the pulse, the workpiece achieving a minimum velocity of 200 meters per second.