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| Number | Title | Issue Date |
| 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 |
| 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 |
| 7019250 | Quick change device for mounting an actuator to a resistance welding gun A quick change device has a mounting member for mounting an actuator to a resistance welding gun by headed fasteners. The mounting member has several keyhole type apertures arranged in a circle. The fasteners extend through the narrow portions of the keyhole type ap... | 03/28/2006 |
| 7002095 | Spot welding system and method of controlling pressing force of spot welding gun A spot welding system using a spot welding gun having a servomotor for driving welding tips capable of suppressing variation of pressing force due to influence of heat generated by welding current to obtain an uniform pressing force. A difference between the tempera... | 02/21/2006 |
| 6911616 | Weld gun assembly A weld gun for performing a welding operation on a workpiece includes a pair of opposing arms, at least one arm movable relative to the opposing arm to apply pressure to the workpiece during a welding operation. A pair of identical or mirror image side plates suppor... | 06/28/2005 |
| 6909064 | Pinch weld gun with swivel shunt connection A weld gun including a frame structure, a weld arm mounted on the frame structure, an electrode mounted on the weld arm and including an electrode cap at one end of the electrode, a transformer, and a shunt fixedly secured at one end thereof to another end of the el... | 06/21/2005 |
| 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 |
| 6828522 | Adaptable servo-control system for force/position actuation An adaptable, servo-control system for force/position actuation generally includes an electric linear actuator and a controller. The controller interfaces with the electric linear actuator and with a number of I/O signals that are independent from the electric linea... | 12/07/2004 |
| 6787729 | Multi-axis articulatable robot having a weld gun with inverted roller screw actuator A multi-axis articulatable robot with a weld gun having a pair of opposing arms, where at least one arm is movable relative to the other arm to apply pressure to a workpiece during a welding operation. At least one of the opposing arms of the weld gun can be rotatab... | 09/07/2004 |
| 6479783 | Electric motor device for powering a tool clamp An electric motor device for powering a tool clamp, for example a resistance welding clamp, of the type comprising a casing of an electric motor 4 the shaft of which is connected to the clamp, to control the electrodes for opening, closing and clamping th... | 11/12/2002 |
| 6469272 | Weld gun with inverted roller screw actuator A weld gun having a pair of opposing arms movable relative to each other to apply pressure to a workpiece during a welding operation. The opposing arms of the weld gun can be rotatable or translatable relative to each other. The opposing arms are moved re... | 10/22/2002 |
| 5556552 | Head for and method of spot welding The present invention relates a head for a spot welding apparatus or a setting apparatus comprising an electrode (2) for to supplying a welding current or setting current to a piece (3) to be welded to another piece (4) or to set and also, to exert, durin... | 09/17/1996 |
| 5477020 | Machine head for spot welding for crimping The force (F) is derived from one or several electromagnetic forces each one of which is developed by the effect of a current (Is, IB) that circulates through a conductor (8) buried within a magnetic field.... | 12/19/1995 |
| 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 |
| 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 |
| 4902869 | Apparatus for resistance welding Apparatus for resistance welding consisting of two electrodes that face one another and are biased toward one another by a spring force. Each electrode is held by an electrode support through which an electro-magnetic force is generated to urge the suppor... | 02/20/1990 |
