Class / Patent application number | Description | Number of patent applications / Date published |
219127000 | Spot arc bonding (e.g., arc riveting) | 10 |
20120031884 | ELECTRIC SPOT WELDING GUN - An electric spot welding gun ( | 02-09-2012 |
20120055910 | Spot-welding method and spot-welding device - When spot-welding a workpiece including a thin plate, a first thick plate, and a second thick plate, the workpiece is clamped by a fixed electrode in contact with the second thick plate, a movable electrode in contact with the thin plate, and control-pressure applying unit set adjacent to the movable electrode and in contact with the thin plate. Pressure is applied to the second thick plate by the fixed electrode, and pressure and control pressure are respectively applied by the movable electrode and the control-pressure applying unit to the thin plate. The pressure from the fixed electrode is controlled to be smaller than the pressure from the movable electrode. The current density between the thin plate and the first thick plate increases. | 03-08-2012 |
20120074113 | SPOT WELDING METHOD AND SPOT WELDING APPARATUS - A spot welding method and a spot welding apparatus are provided. A stacked assembly of at least three workpieces is gripped between first and second welding tips. An inner workpiece positioned inside of the stacked assembly, of two of the workpieces that exhibit a maximum contact resistance in the stacked assembly, is electrically connected to a ground electrode, or to an electrode having the same polarity as the second welding tip near an outer workpiece positioned adjacent to the inner workpiece and facing outwardly from the stacked assembly, of the two workpieces. Then, electric current is applied from the first welding tip toward the second welding tip. In this case, first, the stacked assembly is pressed under a first pressing force, and then, the stacked assembly is pressed under a second pressing force which is greater than the first pressing force. | 03-29-2012 |
20120312794 | WELDING DEVICE FOR STRETCH BENDER - A welding device for a stretch bender is disclosed. The welding device for the stretch bender may include: an operating unit adapted to move forward toward or rearward from a bending die for shaping a shaped beam and mounted in front of the bending die; and a welding unit mounted at the operating unit and welding flange portions of the shaped beam that is completely formed by the bending die so as to prevent the flange portions from being overlapped with each other when extracting the shaped beam, the welding unit being movable forward or rearward against the operating unit. | 12-13-2012 |
20130037528 | SPOT WELDING APPARATUS - There is provided a spot welding apparatus. The spot welding apparatus includes a fixed electrode and a movable electrode that clamp and press a workpiece formed of stacked plates of different rigidities, and a control pressing force applicator that causes a control pressing force applying actuator to bring a receiving unit provided at a distal end of a control pressing force applying arm into contact with the workpiece so as to apply a control pressing force to the workpiece. The control pressing force applying arm is made of a non-magnetic material. | 02-14-2013 |
20130037529 | WELDING GUN - A flange section | 02-14-2013 |
20130056451 | ONE-SIDE SPOT WELDING METHOD AND ONE-SIDE SPOT WELDING APPARATUS - A one-side spot welding method for causing an electrode to contact a welding portion of a work-piece only from one side of the work-piece to weld the work-piece, the method includes a nugget forming process of applying welding pressure to the work-piece through the electrode, and causing the work-piece to be fully electrically conducted at a predetermined current value, and a slow-cooling process of applying welding pressure to the work-piece through the electrode from the one side, and causing the work-piece to be electrically conducted at a current value lower than the predetermined current value after the nugget forming process. | 03-07-2013 |
20130075378 | SPOT WELDING APPARATUS - There is provided a spot welding apparatus. The apparatus includes fixed and movable electrodes to hold and press a workpiece therebetween, and a sub pressure force applicator having a sub pressure unit that moves and selectively stops at a plurality of positions including a sub pressure position where the sub pressure unit is adjacent to the fixed electrode and in contact with the workpiece so as to apply a sub pressure, and a sub-pressure-non-requiring position where the sub pressure unit is located away from the workpiece. Spot welding is performed by applying current between the electrodes while holding the workpiece between the fixed electrode together with the sub pressure unit located in the sub pressure position and the movable electrode. Spot welding is also performed by applying current between the electrodes while holding the sub pressure unit in the sub-pressure-non-requiring position and holding the workpiece between the electrodes. | 03-28-2013 |
20130186872 | METHOD FOR CONTROLLING A SPOT WELDING SYSTEM, INCLUDING THE DETERMINATION OF THE POSITION OF AN INSERTED ELEMENT IN A HOLLOW MEMBER; ASSOCIATED SPOT WELDING SYSTEM - A method of controlling a spot welding system used for attaching an inserted element in a hollow member is provided. A position of the inserted element in the hollow member is determined, the position of an attachment point is determined from the position of the inserted element in the hollow member, and a spot welding operation is performed at the attachment point. Further, a spot welding system for carrying out the method is provided. | 07-25-2013 |
20140001165 | SPOT WELDING SYSTEM AND CONTROL DEVICE FOR SPOT WELDING ROBOT | 01-02-2014 |