Patent application number | Description | Published |
20090308913 | DEVICE FOR USE WITH A FRICTION STIR SPOT WELDING (FSSW) APPARATUS - A device for use with a welding apparatus, such as a friction stir spot welding (FSSW) apparatus, that maintains work pieces in a generally flat or flush orientation during a welding operation. The device can be mounted to the operable end of an FSSW apparatus so that it exerts a stabilizing force against an upper work piece. The stabilizing force exerted by the device prevents the upper work piece from deflecting when the rotating tool of the FSSW apparatus passes through the upper work piece and penetrates into the lower work piece. In an exemplary embodiment, the device includes a housing component that slidably receives a movable component under the force of a biasing component. | 12-17-2009 |
20100089976 | Friction stir welding of dissimilar metals - When a friction stir weld tool penetrates the interface of two workpieces of dissimilar metal alloy materials, the resultant weld of the different alloy materials may produce a weak weld joint. Such weak joints are often experienced, for example, when attempting to form spot welds or other friction stir welds between a magnesium alloy sheet or strip and an aluminum alloy sheet or strip. It is discovered that suitable coating compositions including an adhesive placed at the interface of assembled workpieces can alter the composition of the friction stir weld material and strengthen the resulting bond. In the example of friction stir welds between magnesium alloy and aluminum alloy workpieces, it is found that combinations of an adhesive with copper, tin, zinc, and/or other powders can strengthen the magnesium-containing and aluminum-containing friction stir weld material. | 04-15-2010 |
20100089977 | FRICTION STIR WELDING OF DISSIMILAR METALS - When a friction stir weld tool penetrates the interface of two workpieces of dissimilar metal alloy materials, the resultant weld of the different alloy materials may produce a weak weld joint. Such weak joints are often experienced, for example, when attempting to form spot welds or other friction stir welds between a magnesium alloy sheet or strip and an aluminum alloy sheet or strip. It is discovered that suitable coating compositions placed at the interface of assembled workpieces can alter the composition of the friction stir weld material and strengthen the resulting bond. In the example of friction stir welds between magnesium alloy and aluminum alloy workpieces, it is found that combinations of copper, tin, and zinc, and other powders can strengthen the magnesium-containing and aluminum-containing friction stir weld material. | 04-15-2010 |
20110214799 | FRICTION STIR WELDING OF DISSIMILAR METALS - When a friction stir weld tool penetrates the interface of two workpieces of dissimilar metal alloy materials, the resultant weld of the different alloy materials may produce a weak weld joint. Such weak joints are often experienced, for example, when attempting to form spot welds or other friction stir welds between a magnesium alloy sheet or strip and an aluminum alloy sheet or strip. It is discovered that suitable coating compositions including an adhesive placed at the interface of assembled workpieces can alter the composition of the friction stir weld material and strengthen the resulting bond. In the example of friction stir welds between magnesium alloy and aluminum alloy workpieces, it is found that combinations of an adhesive with copper, tin, zinc, and/or other powders can strengthen the magnesium-containing and aluminum-containing friction stir weld material. | 09-08-2011 |
20110314660 | SPIN WELD METHOD OF MANUFACTURING INDUCTION ROTORS - A method of manufacturing an electric motor includes stacking a plurality of laminate layers to form a rotor stack. A plurality of conductor bars are inserted into a respective one of a plurality of rotor slots defined by the rotor stack, such that each of the plurality of conductor bars protrudes from the axial ends of the rotor stack. End pieces for the electric motor are rotated relative to the plurality of conductor bars to weld the end pieces to the conductor bars. | 12-29-2011 |
20120228272 | WELDING APPARATUS FOR INDUCTION MOTOR AND METHOD OF WELDING INDUCTION MOTOR - A welding apparatus for an induction motor includes a fixture operable to support a rotor and rotate the rotor about an axis of rotation of the motor, and a welding head supported adjacent the fixture and operable to weld conductor bars located about the surface of the rotor to the first shorting ring when the fixture supports the rotor. A controller controls the fixture to selectively rotate the rotor. The controller moves the welding head, the fixture, or both, so that the welding head is in a welding position, and causes the welding head to weld the conductor bars to the first shorting ring while remaining in the welding position, with the rotor rotating to create a substantially circular weld path along the first shorting ring. In some embodiments, the conductor bars are welded to both shorting rings simultaneously. A method of welding an induction motor is also provided. | 09-13-2012 |
20120267419 | SERVO-CONTROLLED ROTATING CLAMPING DEVICE FOR USE WITH A FRICTION STIR SPOT WELDING APPARATUS - A pressure-applying device for use with a welding apparatus includes an annular collar, a housing component, a pressure foot, and a motor. The housing component is coupled with the annular collar and selectively rotatable relative to the annular collar. The pressure foot is at least partially located in the housing component and has a discontinuous contact surface for contacting a work piece and has a central opening for accommodating a welding tool, the discontinuous contact surface may have a first and second contact surface that are respectively disposed on substantially opposing sides of the central opening. The motor is coupled to the housing component and is configured to rotate the housing component with respect to the annular collar. | 10-25-2012 |
20130106123 | STRUCTURAL INTEGRITY WELDED ASSEMBLY | 05-02-2013 |