Abstract:
Light emitting diodes (12) mounted on a tri-layer laminate with an electrically insulating middle layer (16) sandwiched between two metallic aluminum layers (14, 18). The upper aluminum layer serves as a heat sink by facilitating dissipation of heat from the light emitting diodes quicker than traditional printed circuit boards. Furthermore, fins (20) and thermal interface material (22) may be mounted on the backside of the laminate for added cooling.
Abstract:
Friction stir welding tool (10) to facilitate stress reduction within the tool that may include a body (20), a pin (30), a tension member (50), and an end assembly (60), the tension member (50) and end assembly (60) facilitating axial compression of the pin (30). The tension member (50) may be decoupled from the pin (30) and/or body (20) of the tool (10) via one or more decoupling members (62). The end assembly (60) may comprise spring members (64) to provide an axial force to the tension member (50). The pin (30) may include various features to facilitate stress reduction proximal the pin (30).
Abstract:
The present invention provides a production line method of resistance welding comprising the steps of contacting a metal sheet with an electrode having an initial contact surface area at a force to provide a pressure to the metal sheet; applying a current through the electrode to the metal sheet; measuring dimensional changes of the electrode; correlating dimensional changes in the electrode to changes in the initial contact surface area; and adjusting the force to compensate for the changes in the initial contact surface area of the electrode to maintain pressure to the metal sheet. The force may be adjusted by stepping the force to maintain pressure to the faying surface of the metal sheet to be welded. By maintaining the pressure at the faying surface the life cycle of the electrodes may be increased without forming discrepant welds.
Abstract:
A method of making an integral antenna (14) from a metal laminate (10) is provided. The metal laminate (10) comprises a top metal layer (11), a middle thermoplastic layer (12), and a bottom metal layer (13). A portion of the top metal layer (11) of the metal laminate (10) is isolated to create an antenna structure (16) so that the antenna (16) remains a part of the metal laminate (10) to create an integral antenna (14).
Abstract:
A multi-shouldered friction stir welding tool (10) comprises an integral shank-pin unit (11) having a plurality of pin portions on the shank-pin unit, where the plurality of pin portions for driving into a plurality of joints to perform a friction stir welding operation on the corresponding plurality of joints and, where a shank portion of the shank-pin unit is for attachment to an optional axial tension rod (19), each of the friction stir welding modules comprises a pair of shoulders (13, 14) that is connected to the shank-pin unit where each shoulder has a distal end and a proximal end, where the proximal end of each shoulder faces the pin portion of the shank-pin unit, whereby the shoulder and pin(s) rotate in unison, and a pair of split collars or a pair of nuts that is connected to the shank-pin unit and faces the distal end of each shoulder, where the plurality of friction stir welding modules are connected to each other whereby the modules rotate in unison to simultaneously make a plurality of parallel welds. In addition, a method of friction stir welding a plurality of joints simultaneously comprising using at least one multi-shouldered friction stir welding tool is provided.
Abstract:
Friction stir welding tool (10) to facilitate stress reduction within the tool that may include a body (20), a pin (30), a tension member (50), and an end assembly (60), the tension member (50) and end assembly (60) facilitating axial compression of the pin (30). The tension member (50) may be decoupled from the pin (30) and/or body (20) of the tool (10) via one or more decoupling members (62). The end assembly (60) may comprise spring members (64) to provide an axial force to the tension member (50). The pin (30) may include various features to facilitate stress reduction proximal the pin (30).
Abstract:
The present invention provides an improved method of resistance welding comprising the steps of contacting a metal sheet with an electrode having an initial contact surface area at a force to provide a pressure to the metal sheet; applying a current through the electrode to the metal sheet; measuring dimensional changes of the electrode; correlating dimensional changes in the electrode to changes in the initial contact surface area; and adjusting the force to compensate for the changes in the initial contact surface area of the electrode to maintain pressure to the metal sheet. The force may be adjusted by stepping the force to maintain pressure to the faying surface of the metal sheet to be welded. By maintaining the pressure at the faying surface the life cycle of the electrodes may be increased without forming discrepant welds. The current may also be stepped to further extend electrode life.