| Class / Patent application number | Description | Number of patent applications / Date published |
|---|
| 219860250 |
With significant electrode support
| 51 |
| 219910200 |
Methods
| 49 |
| 219910100 |
With condition responsive control of the welding process
| 7 |
| 219860900 |
For one-face welding | 5 |
| 20120067851 | ONE-SIDED SPOT WELDING DEVICE - A one-sided spot welding device of the present invention includes a gun body portion including: an upper body disposed at an end of an arm of a robot and a hollow lower body disposed at a lower portion of the upper body; a power supply portion disposed within the lower body, a welding electrode portion i) disposed at a lower side of the lower body, ii) supplied welding power from the power supply portion, and iii) configured to weld welding base metals together by electrical resistance welding; a coated metal band supply portion supplying a coated metal band between the welding base metal and the welding electrode; and a ground electrode portion, electrically connected to the power supply portion and disposed at the other lower side of the lower body for contacting the welding base metal. | 03-22-2012 |
| 20140158668 | ONE-SIDE RESISTANCE SPOT WELDING METHOD AND APPARATUS FOR CARRYING OUT THE SAME - A one-side resistance spot welding method includes a preheating step followed by a welding step. In the preheating step, an electric current having a smaller current value than a welding current is fed from a first electrode to second electrodes such that a substantially annular high-temperature region coaxial with the first electrode and having a higher temperature than neighboring parts is created in a workpiece due to resistance heat generation at a position located near a tip end of the first electrode. In the welding step, the annular high-temperature region forms a shielded current path due to its high electric resistance and serves to guide a welding current from the first electrode to flow into a bottom steel sheet of the workpiece via the shielded current path, thereby allowing the welding current to subsequently advance along the bottom steel sheet and reach the second electrodes via a top steel sheet. | 06-12-2014 |
| 20140183167 | WELDING DEVICE FOR PANEL SHEETS AND WELDING METHOD FOR THE SAME - A method of welding panels overlapping each other includes a one-directional clamping step that performs one-directional clamping by positioning electrodes of a pair of one-directional spot welding guns with respect to an upper panel and a lower panel overlapping each other, a pressure welding step that forms a plurality of pressure welding portions in a zero gap status by pressure-welding the upper panel to the lower panel in a temporary welding status, by pressing and supplying electricity to the upper panel with the electrodes of the one-directional spot welding guns, plasma spot step that forms a molten portion between the pressure welding portions by performing plasma welding on the pressure welding portions with a plasma welding machine, and a cooling step that forms a welded portion by overlapping the pressure welding portions and the molten portion between the upper panel and the lower panel by cooling the molten portion. | 07-03-2014 |
| 20140263197 | METHOD FOR SINGLE-SIDED RESISTANCE WELDING - A method of single-sided resistance welding includes providing a first workpiece and a second workpiece. The first workpiece is positioned so that at least a portion of the first workpiece is in contact with at least a portion of the second workpiece. A weld electrode is positioned in contact with the first workpiece, and a ground electrode is positioned in contact with the second workpiece. A determination is made as to whether a gap or other high resistance condition is present between the first workpiece and the second workpiece. If a gap or other high resistance condition is determined to be present between the first workpiece and the second workpiece, the gap or other high resistance condition is reduced, and the first workpiece and the second workpiece are joined through welding. | 09-18-2014 |
| 20160045976 | INDIRECT SPOT WELDING METHOD - An oval nugget can reliably be obtained with this indirect spot welding method. In this indirect spot welding method, an electrode end portion of a welding electrode includes a tip of the welding electrode, and as viewed from the tip, the electrode end portion has a two-step dome shape formed by a first curved surface with a curvature radius r | 02-18-2016 |
| 219087000 |
Multiple spot type | 4 |
| 20110017710 | MULTIPLE WELDING GUN SYSTEM - A multiple welding gun system includes a plurality of welding guns, simultaneously performing welding operations, mounted to a robot arm of a welding robot and a pitch changing device as a space adjusting device disposed between the plurality of welding guns. The pitch changing device is configured to change a gun pitch so as to adjust a space between the welding guns by rotating one of the welding guns relative to other one of the welding guns to thereby move the welding guns closer to or separate from each other. | 01-27-2011 |
| 20130015164 | RESISTANCE SPOT WELDING OF ALUMINUM TO ALUMINUM AND STEEL TO STEEL - A method for welding a plurality of aluminum to aluminum welds and a plurality of steel to steel welds using the same welder includes providing a resistance spot welder with a pair of weld electrodes having an electrode face radius of curvature in the range between 20 mm and 40 mm. The series of aluminum to aluminum welds is first made, and then, after completing the aluminum to aluminum welds, the series of steel to steel welds are made. After completing the steel to steel welds the weld electrodes are cleaned by an abrasive to remove any buildup or contamination of aluminum on the electrodes. In the event the electrodes have mushroomed, then dressing of the electrodes is provided and then the abrasive cleaning is performed to restore the surface texture. | 01-17-2013 |
| 20150053654 | RESISTANCE SPOT WELDING STEEL AND ALUMINUM WORKPIECES USING ELECTRODE WELD FACE COVER - A method of resistance spot welding a steel workpiece and an aluminum or aluminum alloy (“aluminum”) workpiece together includes several steps. One step involves providing a workpiece stack-up with a steel workpiece and an aluminum workpiece. Another step involves attaching a cover over a weld face of a welding electrode. The cover is made of a metal material with an electrical resistivity that is greater than an electrical resistivity of a material of the welding electrode. Yet another step involves performing multiple individual resistance spot welds to the workpiece stack-up. The cover abuts the aluminum workpiece while the individual resistance spot welds are performed. And another step involves removing the cover from the welding electrode after the individual spot welds are performed. | 02-26-2015 |
| 20160184880 | Multiple Wire Wrap Screen Fabrication Method - A wire wrap screen manufacturing method for a given screen diameter involves simultaneous winding of parallel wires that begin in circumferentially offset locations on one end of a perforated base pipe that has circumferentially spaced support rods saves fabrication time. Each of the ends of the wires lie in a common plane to allow fitting an end cap for sealing or to just continuously weld at the ends of the wires to seal the assembly to the base pipe. The spot welds to the support rods occur as the wire is wound over such rods. Equal initial circumferential spacing of the start locations for the wires is preferred although asymmetrical spacing is preferred. | 06-30-2016 |
| 219090000 |
Plier or tong type | 3 |
| 20090050607 | Spot Welding Tongs Including a Compensation Unit Equipped With a Curved Connector Element - The invention relates to spot welding tongs with tong compensation, including a tong base body ( | 02-26-2009 |
| 20090266797 | SPOT WELDING TONGS FOR ROBOTIC APPLICATIONS IN RESISTANCE WELDING OR WORKPIECES - There are spot welding tongs for robotic applications in resistance welding of workpieces, in particular sheets, comprising tong arms, mounted such as to pivot on a base body, which may be adjusted using an operator and to which electrode holders for the electrodes are fixed and a winding device with a pay-out roller and a wind-in roller, for the winding in and out of a strip to protect at least one electrode. According to one embodiment, such spot welding tongs may be produced, in which access is not seriously affected and with a very simple and compact construction, whereby the pay-out roller and the wind-in roller of the winding device are arranged on the base body, or the tongs arm and at least one guide groove, for guiding the strip, is arranged in the tongs arm and/or the electrode holder. | 10-29-2009 |
| 20140291300 | SPOT WELDING SYSTEM INCLUDING SPOT WELDING GUN - A spot welding system ( | 10-02-2014 |
| 219860210 |
With hand-manipulative portable devices | 1 |
| 20150298245 | PROJECTION WELDING DEVICE - A projection welding gun device includes an upper welding tip and a lower welding tip that are combined with a gun body through a shank, where the upper welding tip presses an upper panel corresponding to a protrusion portion that is formed on a lower panel to weld the upper and lower panels, and a rotation unit that is rotated by a driving portion is disposed between the gun body and the shank to rotate the shank. | 10-22-2015 |
| 219860240 |
With work orientation means | 1 |
| 20150144601 | RESPOT JIG - A respot jig is capable of easily moving a welding gun to any welding position and controlling positions of various kinds of workpieces. The respot jig includes: a jig having a flat shape; welding systems installed at both sides of an upper portion of the jig and including a five-shaft rotating unit and a welding gun connected to an upper end of the five-shaft rotating unit, respectively; and an aligning and controlling system installed on the jig between the welding systems and including at least one swivel clamp unit and at least one aligning unit. | 05-28-2015 |
| 219860230 |
With welding pressure controlled by the work support | 1 |
| 20150034609 | RESISTANCE WELDING WITH MINIMIZED WELD EXPULSION - A system for forming a weld nugget in a metal work piece includes a power supply, actuator, electrodes, and controller. The actuator delivers a variable electrode force to the work piece in response to a force command. The controller executes a method by transmitting a welding current command to the power supply to cause the power supply to output a welding current to the electrodes. The controller transmits the force command to the actuator to apply the variable electrode force, via the electrodes, to the work piece at a first force level. The variable electrode force increases from a second force level immediately upon conclusion of a first duration to minimize weld expulsion. The second force level commences at a point in time in the dynamic resistance profile at which a dynamic resistance value of the work piece decreases at a threshold rate during formation of the weld nugget. | 02-05-2015 |
| 219860220 |
With separately applied pressure and heat | 1 |
| 20170232547 | METHOD FOR IMPROVING QUALITY OF ALUMINUM RESISTANCE SPOT WELDING | 08-17-2017 |
| Entries |
| Document | Title | Date |
|---|
| 20100193478 | Electrode for spot welding - Provided is an electrode ( | 08-05-2010 |
| 20100282716 | WELDING ASSEMBLY AND ASSOCIATED METHOD FOR WELDING, MECHANICALLY DEFORMING AND HEAT TREATING MATERIALS - A welding assembly including a current generator, a first electrode electrically coupled to the current generator, the first electrode including a first engagement surface and defining a first recess in the first engagement surface, and a second electrode electrically coupled to the current generator, the second electrode including a second engagement surface and defining a second recess in the second engagement surface, wherein the first recess is aligned with the second recess. | 11-11-2010 |
| 20110240605 | SPOT WELDING SYSTEM AND DRESSING DETERMINATION METHOD - A spot welding system including a welding gun with an openable/closable electrode pair; and a dressing determination device determining a quality of a shaping process applied to an electrode of the electrode pair. The dressing determination device includes a visual sensor obtaining an image of the electrode, identifying a base and a tip of the electrode on the image and measuring a distance between the base and the tip on the image, by image processing; a visual sensor control section allowing the visual sensor to measure the distance immediately before and after the shaping process is performed; a cut amount calculation section calculating a difference between the distances measured by the visual sensor immediately before and after the shaping process is performed, as a cut amount of the electrode; and a cut amount judgment section judging whether the calculated cut amount is within a predetermined acceptable range. | 10-06-2011 |
| 20120031880 | ELECTRODE UNIT OF SPOT WELDING MACHINE - An electrode unit of a spot welding machine in which a recessed fitting portion having a circular shape in section is formed in a surface of a projecting portion of an electrode holder. A first groove is formed in an inner peripheral surface of the recessed fitting portion. A cooling water passage continuous to the recessed fitting portion is formed in the electrode holder. A columnar fitting portion is formed in a base end of the abutting portion of the electrode. A second groove is formed in an outer peripheral surface of the fitting portion. The fitting portion is inserted in the recessed fitting portion. An O ring is fitted in the first groove and the second groove. Then the electrode is attached to the projecting portion. A cooling water circulated in the cooling water passage cools down the electrode and the projecting portion. | 02-09-2012 |
| 20120193330 | SPOT WELD DATA MANAGEMENT AND MONITORING SYSTEM - A weld data management and monitoring system that supports weld data trend analysis. Weld data is collected for each weld operation and a trend index equation is applied to the data to calculate a composite number for the operation. The composite numbers for numerous welds may be plotted and analyzed to detect and evaluate weld trends over a specified period of time. In an example embodiment, the trend index equation uses the weld heat input, current, resistance, and time values to calculate the composite number. Trend data may be analyzed to identify a time when variances, whether within or outside specified tolerances, occurred. The ability to detect and analyze variances in weld operation data during a specified period of time may assist the manufacturer in identifying and resolving problems related to the weld equipment as well as other manufacturing processes or operations that may have caused variances in weld operations. | 08-02-2012 |
| 20130186867 | Spot Welding Clamp and A Spot Welding Process - The invention belongs to the technical field of welding, and in particular relates to a spot welding clamp which avoids rosin joint, false welding and fire blasting and is used in spot welding process with high efficiency. The spot welding clamp comprises a clamp body, an electric core holding area and a fuse holding area, wherein the electric core holding area and the fuse holding area are arranged on the clamp body. A clearance is arranged between the electric core holding area and the fuse holding area. Compared with the prior art, the spot welding clamp can well position a fuse and a metal strip and adjust the height of a welding pin, thus improving spot welding quality, lowering welding defect rate, improving productivity and reducing cost. In addition, the invention also discloses a spot welding process using the spot welding clamp. | 07-25-2013 |
| 20130240489 | SPOT WELDING CAP CHANGER - The invention relates to a spot welding cap changer ( | 09-19-2013 |
| 20150034607 | GRINDING SYSTEM AND SPOT WELDING SYSTEM - A grinding system includes a welding gun movable relative to a workpiece. A pair of clamp devices move relatively toward each other to clamp a workpiece. A welding tip is disposed on one of the pair of clamp devices. A detector detects a relative movement amount of the welding tip with respect to the other clamp device. A dresser grinds the welding tip. While the dresser is grinding the welding tip, a determinator determines whether to make the dresser end grinding the welding tip based on the movement amount detected by the detector. When the determinator determines to make the dresser end grinding the welding tip, an instructor instructs the dresser to end grinding the welding tip. | 02-05-2015 |
| 20150034608 | GRINDING SYSTEM AND SPOT WELDING SYSTEM - A grinding system includes a period determiner that determines, on the basis of a torque of a grinder of a dresser that grinds a welding tip, whether the current period is a grinding period in which the grinder is grinding the welding tip or a non-grinding period in which the grinder is not grinding the welding tip; and an anomaly detector that detects anomalies that are associated beforehand with each of the grinding period and the non-grinding period. | 02-05-2015 |
| 20160039039 | ALUMINUM RESISTANCE SPOT WELDING TIP AND METHOD OF MAKING THE SAME - An electrical resistance spot welding tip for joining a plurality of aluminum alloy workpieces includes a cylindrical body extending along a central axis defined through the body between a first end and an opposing second end of the cylindrical body. A spherically domed central region is formed at the first end of the cylindrical body. The spherically domed central region has an outer boundary defining a diameter of the spherically domed central region. An annular outer ring is positioned coaxially about the spherically domed central region. The annular outer ring has an end surface defined in a plane perpendicular to the central axis. A distance between a point on the spherically domed central region defined at the central axis and the end surface of the annular outer ring is dependent on a thickness of each of the plurality of aluminum alloy workpieces. | 02-11-2016 |
| 20160084288 | SELF PIERCING PROJECTION WELDING RIVET, AND JOINED STRUCTURE AND JOINING METHOD USING THE RIVET - A self piercing projection welding rivet is disclosed. According to an exemplary embodiment of the present invention, a self piercing projection welding rivet for joining a non-ferrous material and a steel material may include a head portion, a shank portion integrally connected to the head portion for piercing the non-ferrous material, and a projection portion formed at a piercing end of the shank portion for being brought into contact with the steel material. | 03-24-2016 |
| 20160155519 | SPOT WELDING GUN AND WELDING METHOD FOR THE NUCLEAR FUEL SKELETON | 06-02-2016 |
| 20160158873 | METHOD FOR CONNECTING AT LEAST TWO SHEET METAL PARTS - The invention relates to a method for connecting at least two sheet metal parts ( | 06-09-2016 |
| 20160250709 | INDIRECT SPOT WELDING APPARATUS | 09-01-2016 |
