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| Number | Title | Issue Date |
| 7728249 | Arrangement of a stress transducer on one arm of welding pliers, and method for mounting said stress transducer An arrangement of a stress transducer (8) mountable on one arm (31) of welding pliers, wherein an insert (10) is positioned between the arm (31) of the pliers and the stress transducer (8). A method for mounting said stress transdu... | 06/01/2010 |
| 7301117 | Process and device for controlling the pressing force of an electrode holder A process and a device for controlling the pressing force of the electrodes [of an] electrode holder driven by means of an electric motor, especially of an industrial robot, during the welding operation characterized in that the motor position is controlled or that ... | 11/27/2007 |
| 7301118 | Welding gun with controller and method for using same A welding gun assembly including a housing that defines a first chamber and a second chamber. The assembly also includes a first piston moveably disposed in the first chamber and a second piston moveably disposed in the second chamber. The assembly includes an inten... | 11/27/2007 |
| 7145097 | Method and apparatus for electrical resistance spot welding using electrical servo actuator The present invention provides a servo driven spot welder where an electric servo actuator moves at least one of two electrodes to and away from the workpiece. The servo driven spot welder includes a controller that allows accurate control of the position of one of ... | 12/05/2006 |
| 7126078 | Sub-micron adjustable mount for supporting a component and method An arrangement is provided including an electrode extending to an electrode tip for contacting a workpiece. A welding configuration of the electrode tip is established by exposing the electrode tip to a selected welding environment for use in forming a weld having a... | 10/24/2006 |
| 7098419 | Driving device and clamping tool equipped with same The invention concerns a device comprising a screw (10) with pitch (P1) driven by a motor (M), a nut (12) co-operating with the screw (10) and designed to be driven in translation in the direction of the screw axis, said nut being integra... | 08/29/2006 |
| 7075028 | Sub-micron adjustable mount for supporting a component and method Attaching an attachment surface of an electrically conductive workpiece to an electrically conductive support surface is described. In one aspect, a biasing force is distributed at least partially around a weld region of the workpiece to urge the attachment surface ... | 07/11/2006 |
| 6941826 | Method and device for detecting abrasions of electrodes in stationary welding gun A method for detecting abrasion of both a moving side electrode (2) and a fixing side electrode (3) of a stationary type welding gun in which the moving side electrode (2) and the fixing side electrode (3) opposed to the moving side elect... | 09/13/2005 |
| 6911615 | Welding head A welding head for connecting weld members by resistance welding includes an infeed cylinder having a piston rod, an electrode movable via the cylinder; and a sensor arranged between the piston rod of the infeed cylinder and a readjusting spring for the rapid readju... | 06/28/2005 |
| 6903298 | Resistance welding control method This invention provides a method of producing a series of substantially uniform spot welds between two metal parts using a servomotor driven movable electrode and an axially opposing fixed electrode. Target values for electrode displacement in producing a weld inden... | 06/07/2005 |
| 6573470 | Weld gun heat removal A weld gun includes internal, external and structural devices that dissipate heat generated at electrode tips without requiring a continuous external source coolant. The internal devices utilize heat pipes within the electrodes to transfer heat to seconda... | 06/03/2003 |
| 6392185 | Electrical welding clamp comprising a mechanical device for indexing and de-indexing The welding gun includes an electrically driven welding clamp comprising a fixed indexed arm and a mobile arm, respectively provided with an electrode, and a device for indexing and de-indexing locking and releasing the clamp movement relative to the weld... | 05/21/2002 |
| 6359249 | No wat welding system The present invention relates to an improved resistance weld-based gun assembly for use in an electric welding system without a need for plant-provided air and water-cooling circulation systems. In one aspect of the invention, a resistance-based force con... | 03/19/2002 |
| 6294750 | Method and apparatus for automatically adjusting air pressure in a pneumatic weld head A pressure regulator system for a pneumatically- or hydraulically-actuated weld head. The weld head includes a switching valve comprising several ports: an inflow port attached to a source of pressurized gas, preferably air; an exhaust port; a first line ... | 09/25/2001 |
| 6204468 | Force-controlled resistance welding device Resistance welding device of the type comprising two welding electrodes (21, 31) that are displaceable in relation to one another and can clamp between them the sheet metal to be welded. One of said electrodes (31) is connected to driving means formed by ... | 03/20/2001 |
| 6180910 | Force control techniques on a resistance welding machine The present invention is an improved welding technique that provides real-time control of the servo valve to account for the changing conditions of the parts being welded. The present invention may be implemented within any electrical welder having at lea... | 01/30/2001 |
| 6064028 | Resistance forge welding machine In resistance forge welding, the heat for the welding point is produced by simultaneous action of an electrical current and the force of the electrode as well as the electrical resistance of the materials to be welded in the region of the point of contact... | 05/16/2000 |
| 5954976 | Method and apparatus for automatically adjusting air pressure in a pneumatic weld head A pressure regulator system for a pneumatically- or hydraulically-actuated weld head. The weld head includes a switching valve comprising several ports: an inflow port attached to a source of pressurized gas, preferably air; an exhaust port; a first line ... | 09/21/1999 |
| 5883355 | Method of adjusting a clamping force of servo-controlled welding gun A method of adjusting a clamping force for automatically correcting a reference clamping force(Fi) vs. electric reference supply current(Ii) table for a servo-controlled welding gun on which a workpiece is clamped. The clamping force vs. electric current ... | 03/16/1999 |
| 5770807 | Apparatus for taking up and guiding a connection device An apparatus for taking up and guiding a tool device, especially a connection device, comprises a feed device that can move along a feed axis by a servo-element. A take-up device moves along an axis so that the take-up device can move relative to the feed... | 06/23/1998 |
| 5652488 | Welding electrode holder control A robot welding device with a servo-valve controlled drive for the electrodes and an electrical control for the servo-valves with at least one transducer for actual data on the welding process and an interface for the measurements to a computer unit. By w... | 07/29/1997 |
| 5545872 | Pressure controller and pressure control method for resistance welder An improved tip dressing process is provided wherein the pressure between the electrode tip of a resistance welder and the cutter of a tip dresser is varied during the tip dressing process. A pressure controller is also provided for controlling the pressu... | 08/13/1996 |
| 5504298 | Methods and apparatus for detecting electrode separation Methods and apparatus for identifying the occurrence of fusing electrical attachment during fusing operations are provided. After a conventional fusing operation is complete, an electrical signal is applied to the fusing electrode while the fusing electro... | 04/02/1996 |
| 5484986 | Weld force limiter A weld force limiting apparatus for use in bench and press type welding units which is capable of advancing a first electrode into contact with production pieces to be welded together. The weld force limiter has a high pressure air source connected theret... | 01/16/1996 |
| 5471028 | Resistance welding machine A resistance welding machine comprises clamping force representing value measuring means for measuring a clamping force representing value corresponding to a clamping force applied on workpieces by a pair of electrodes, clamping force representing value d... | 11/28/1995 |
| 5428202 | Methods and apparatus for fusing electrical conductors Methods and apparatus for fusing together electrical conductors to a commutator are provided. A precise, timed, and controlled delivery of electric current to the fusing electrode of the fusing machine is achieved. A generic supply signal is converted int... | 06/27/1995 |
| 5386092 | Fast response weld head A fast response weld head which employs a control system to allow user control of critical welding parameters such as speed, force, position, and duration. In one embodiment, the control system includes a position servo loop attached to a motor driven out... | 01/31/1995 |
| 5360958 | Welding apparatus having coaxial welding electrodes A resistance welding apparatus for welding a wire to a metallic pad of an integrated circuit. The welding apparatus has coaxial welding electrodes with the outer electrode being in the form of a tube. The inner electrode is a cylindrical rod and is locate... | 11/01/1994 |
| 5331130 | Method and apparatus for fusing terminal or commutator wire connections on an armature or stator An apparatus and method for fusing terminal or commutator wire connections on an armature or stator, including an electrode, a pneumatic locking cylinder for driving the electrode into contact with the workpiece and applying a force to the workpiece, a lo... | 07/19/1994 |
| 5300753 | Methods and apparatus for fusing electrical conductors Methods and apparatus for fusing together electrical conductors to a commutator are provided. A precise, timed, and controlled delivery of electric current to the fusing electrode of the fusing machine is achieved. A generic supply signal is converted int... | 04/05/1994 |
| 5225647 | Motorized weld head The motorized weld head employs a control system which allows user control of critical welding parameters such as speed, force, position, and duration. The control system includes a position servo loop attached to a motor-driven output shaft on which a we... | 07/06/1993 |
| 5138127 | Pressure welding with closed loop force control A parallel-gap welder applies a precisely controlled force to the weld head (40) by means of a solenoid (60) having a plunger (72) aligned with the axis of the welding electrodes (50,52). To precisely control the amount of force applied by the solenoid a ... | 08/11/1992 |
| 5063279 | Methods and apparatus for fusing armature and stator wires Methods and apparatus for fusing armature wires to a commutator, and fusing stator lead wires and stator hooks, are provided. An electrode assembly having a screw mechanism converts the rotational motion of a motor into a translational motion of the fusin... | 11/05/1991 |
| 4831228 | Electrical resistance welding guns having workpiece clamping and independent electrode biasing An electrical resistance welding gun includes a hydraulically or pneumatically actuated clamping device for forcing workpieces into contact with one another, and a device for preloading and maintaining loaded contact between welding electrodes located on ... | 05/16/1989 |
| 4605833 | Lead bonding of integrated circuit chips A method and apparatus for bonding a plurality of metallic leads to pads of a chip where the force of a thermode, which is placed in contact with the chip is increased at a first rate to a maximum force less than required to effect the bonding over a time... | 08/12/1986 |
| 4584460 | Fused eyeletting machine A portable machine is disclosed for setting eyelets and the like in printed circuit boards and includes an upper tool connected to a mandrel mounted in a frame and movable into and out of engagement with a lower tool by a toggle means. The lower tool is r... | 04/22/1986 |
| 4484056 | Method and apparatus for conveying at least one welding or soldering electrode to a work piece It is proposed that the supply movement of electrodes, especially micro-welding or micro-soldering electrodes takes place in a controlled fashion. For this purpose, PRES-value receivers (65, 67) are provided, which change the PRES-value of a relatively kn... | 11/20/1984 |
| 4453072 | Welding method and apparatus suitable for forming links in jewelry In a link forming apparatus, U-shaped links are fed into a forming station and closed by a forming anvil. Opposing electrodes are then pressed against each side of the closed link by means of a common belt drive which is in turn pneumatically driven. Each... | 06/05/1984 |
| 4419558 | Apparatus and method for monitoring and controlling resistance spot welding The quality of an electrical resistance spot weld is determined by monitoring the squeezing force applied through the electrodes to the workpieces by a force-transmitting device that exerts a squeezing force that varies when indentation of the workpieces ... | 12/06/1983 |
| 4371772 | Plural shaft electrode support for fusing machine A fusing machine utilizes a fusing electrode assembly and a ground electrode assembly suspended from the fusing electrode assembly. The fusing electrode assembly includes a lower fusing electrode shaft and an upper fusing electrode shaft. The lower fusing... | 02/01/1983 |
