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| Number | Title | Issue Date |
| 7863539 | Positioning method of spot welding robot A positioning method of a spot welding robot, the spot welding robot having a movable electrode tip and an opposition electrode tip opposed to the movable electrode tip. The method sandwiches a work piece to be welded between the pair of electrode tips and includes ... | 01/04/2011 |
| 7420137 | Method of open and/or closed-loop control of the movement of welding tongs A method for open or closed-loop control of welding tong movement utilizes a welding tong drive having a primary and a secondary drive device. The primary drive device moves two welding tong limbs with welding electrodes toward a welding object from opposite sides. ... | 09/02/2008 |
| 7238911 | Resistance welding tip with improved cooling system An improved cooling system for adapting to a two-component welding electrode device having a shank and cap, includes a retractable nozzle tube, a manifold, and an adjustment element for adjustably interconnecting the tube and manifold. A threaded bushing or plunger ... | 07/03/2007 |
| 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 |
| 7075029 | Method for assembling a vehicle body The method for assembling a vehicle body according to an embodiment of the present invention includes: a floor assembly key-welding process for affixing a center floor and a rear floor together through a tack welding; a floor assembly respot process for forming a fl... | 07/11/2006 |
| 7060929 | Sheet-to-tube resistance spot welding using servo gun A method of spot welding a sheet overlapped to a tube with a servomotor-driven electrode applying a clamping force to the sheet. Over a first clamping time interval, the clamping force is increased to a first force level, at which point a welding current is applied ... | 06/13/2006 |
| 7037126 | Rotary joint for fluid electricity The present invention is directed to a rotary joint that includes a power slip ring and an electric signal slip ring, both for passing electricity between a stator and a rotor The system includes a plurality of slip rings (21,31) and a plurality of circumfere... | 05/02/2006 |
| 6943315 | Robot spot welding apparatus for nuclear fuel skeleton and spot welding method using the same The automatic robot spot welding apparatus includes a welding bench including clamping frames, which are uniformly arrayed and have receiving portions for the sparer grids, and have, at both ends of the welding bench, fixing plates for the guide tubes and the instru... | 09/13/2005 |
| 6881920 | Welding parameters setting method for a resistance welder controll apparatus A robot controller and a welding timer coupled to each other by a dual-port RAM which is connected to data busses thereof, and Initial reference values of welding parameters are stored into a ROM of welding timer in same sequence as character strings of items. When ... | 04/19/2005 |
| 6835909 | Method and apparatus of assembling vehicular body A method of assembling a vehicular body includes the following operations: positioning a floor main and making a relative positioning between the floor main and a body side's lower section, by using a three-dimension general locato... | 12/28/2004 |
| RE38570 | Control unit and control method of robot used for arc welding A welding voltage value Vf and a welding current value IF are respectively monitored by a detector during execution of arc welding in accordance with a robot operation program, indexes are calculated which show how far the monitored values Vf and If are deviated fro... | 08/24/2004 |
| 6339204 | Apparatus for assembling floor of vehicle The floor of a motor vehicle which is assembled in a floor assembly station is transported to a subsequent station using at least two welding robots on each lateral side of the floor assembly station. These welding robots are constituted into dual-purpose... | 01/15/2002 |
| 6278077 | Weld indexing method and system A welding method and system for welding a workpiece at weld locations includes a weld controller having control logic and stored data related to weld locations and workpiece dimensions. The weld controller is operable with a displacement sensor for monito... | 08/21/2001 |
| 6225590 | Method for determining a condition of a resistance spotwelding system or a workpiece in the system This invention relates to methods to control the resistance spotwelding process using an electric servomotor actuator to move the welding electrodes to the work and apply force to them. Measurements of actuator position, servomotor drive voltage, servomot... | 05/01/2001 |
| 6218637 | Method for resistance weld gun gross force selection A method for sizing a weld tool for forming a resistance spot weld to fasten a joint having at least two sheet metal members is provided. The method includes the steps of providing a plurality of weld force curves, determining a governing metal thickness,... | 04/17/2001 |
| 6069338 | Method and apparatus for controlling spot welding robot The disclosed spot welding robot controlling method and apparatus is able to carry out an operation for pressurizing a spot welding gun without a dead time of a spot welding robot which has the spot welding gun driven by a fluid pressure. The control meth... | 05/30/2000 |
| 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 |
| 5988486 | Method of controlling electrode force of spot welding gun In a spot welding gun which is made up of a gun main body which is operated for equalization by a driving source, a stationary electrode tip which is immovable relative to the gun main body, and a movable electrode tip which is connected to a pressing sou... | 11/23/1999 |
| 5945011 | Control apparatus for welding robot and method of teaching welding robot A control apparatus for a welding robot has a welding gun which is provided at a front end of a robot arm to be driven by plural kinds of servomotors. An amplifier circuit board is provided so as to mount thereon appropriate inverters by selecting out of ... | 08/31/1999 |
| 5898285 | Method of teaching welding robot A welding robot has a gun main body, a stationary electrode tip which is immovable relative to the gun main body, and a movable electrode tip which is mounted on the gun main body and is opened and closed by a pressing source. The gun main body is movable... | 04/27/1999 |
| 5880424 | Spot welding head A spot welding head comprises a spot electrode 6, a spot electrode supporter 3 holding the electrode 6 on its tip, a base member 2 holding the supporter 3 in such a manner that the supporter 3 can swing on a first pin 4, a frame 1 holding the base member ... | 03/09/1999 |
| 5869799 | Welding gun control method Positions where the pair of electrode chips are in contact with each other are regarded as reference positions. Desired starting positions where the tips of the pair of electrodes are slightly apart from the surfaces of a workpiece are determined on the b... | 02/09/1999 |
| 5812408 | Control unit and control method for robot used for arc welding A welding voltage value Vf and a welding current value If are respectively monitored by a detector during execution of arc welding in accordance with a robot operation program, indexes are calculated which show how far the monitored values Vf and If are d... | 09/22/1998 |
| 5510593 | Method and apparatus for separating a temperature-adhered electrode tip A method for separating a temperature-adhered electrode tip from a workpiece wherein the electrode tip is biased in a direction away from the workpiece and a separation force is imposed on the electrode tip while the biasing force is being imposed so that... | 04/23/1996 |
| 5488215 | Swivel connection A swivel connection for attachment to robot arms is disclosed for supplying a fluid to an associated tool mounted on the robot arm. The swivel connection includes a rotatable cylindrical hub, an attachment device mounted on one surface of the hub for rota... | 01/30/1996 |
| 5486672 | Methods and apparatus for commutator fusing An improved fusing machine is provided that allows commutators to be balanced during the fusing process. Commutator tangs are compressed onto coil leads to form lead connections. The fusing machine compresses the tangs to varying degrees relative to the s... | 01/23/1996 |
| 5484975 | Spot welding apparatus A spot welding apparatus comprises a welding gun having a pair of opposing welding electrodes either one of which is movable towards the other to apply a pressure onto a work and away from the other to release the pressure, a servomotor attached to the we... | 01/16/1996 |
| 5449875 | Method of controlling spot welding robot Before executing a spot welding by a robot, a pressurization command is issued to a welding gun to measure the time required before receiving a pressurization completion signal from a welding gun. Thus measured value is set and stored as a time (T0) requi... | 09/12/1995 |
| 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 |
| 5340960 | Control apparatus for spot welding robot A control apparatus for carrying out a spot welding operation using a robot comprises a spot welding gun having a spot welding tip, an electric drive mechanism for driving the tip, and a control unit for controlling the electric drive mechanism, in which ... | 08/23/1994 |
| 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 |
| 5073692 | Automatic welding electrode cap changer An electrode cap mounting station includes a linearly reciprocal drive member. Two electrode cap engaging members, each having opposed facing knife edges, are arranged in inverted relationship with respect to each other and pivotally connected at one end ... | 12/17/1991 |
| 4963712 | Spot welder A spot welder comprising a movable truck which is movable along a workpiece, and first, second and third electrodes supported on the truck. The first and second electrodes are adapted to pair with each other for series welding, and one of the first and se... | 10/16/1990 |
| 4904838 | Electrode changers and methods of operation for electrical bonding apparatus Electrical bonding apparatus such as a fusing machine is provided with plural separate electrode holders such that the position of an electrode relative to each holder can be adjusted. The position of each electrode relative to the holder is adjusted whil... | 02/27/1990 |
| 4902868 | Advanced parallel seam-sealing system An advanced parallel seam-sealing system which includes a control console, computer deck, electronic keyboard and welding robot for automatically sealing electronic and other component packages. The welding robot is designed to have seven (7) degrees of m... | 02/20/1990 |
| 4894507 | Welding device A synchronized device for welding contact pieces onto support material. The device has two electrodes mounted on a housing. The contact pieces and the support material can be separately fed between the electrodes. At least one of the electrodes has an ele... | 01/16/1990 |
| 4786779 | Saw blade segment welding apparatus A welding apparatus for welding hard segments to the circumference of a base of a saw blade. The blade base is clamped between two electrodes of a first electrode unit which can rotate. The segment is clamped by conductive fingers of a second electrode un... | 11/22/1988 |
| 4761533 | Spot welding device A spot welding device for welding car bodies at a plurality of different positions without the need to move the car body to the welding device for each weld position. The device comprises a polyhedron shaped rotating member having a plurality of electrode... | 08/02/1988 |
| 4733042 | Welding control apparatus including a pressure regulating valve operated in accord with predetermined schedule of variations of a welding force control variable A welding machine controller for controlling the welding operation of a welding machine controls welding force applied to a workpiece by directly controlling a pressure regulating valve which regulates the pressure of working fluid supplied to a power cyl... | 03/22/1988 |
| 4724294 | Programmable welder The specification discloses a programmable resistance welder including a work table, a gun assembly, a gun transport mechanism, a weld control, and a master control. The gun assembly and transport mechanism are located entirely above the table. The contro... | 02/09/1988 |
