103results about "Pressure electrodes" patented technology

A first electrode coolant path is configured to cool a first welding electrode by liquid coolant flowing from a supply path through the first electrode coolant path to a return path. A second electrode coolant path is configured to cool a second welding electrode by liquid coolant flowing from the supply path through the second electrode coolant path to the return path. Three or more valves are configured to stop or reduce liquid coolant flow through the first or second electrode coolant path and configured to stop or reduce liquid coolant backflow from the return path when the first or second welding electrode is at least partially detached. At least one valve is coupled in the first or second electrode coolant path. A drawback apparatus generates a suction force to draw liquid coolant away from a gap formed when the first or second welding electrode is at least partially detached.

The invention relates to a spot welding clamp (1) comprising a lower welding arm (12) carrying a first electrode support (121) and a first electrode (122), and an upper welding arm (11) carrying a second electrode support (111) and a second electrode (112) for performing a spot welding between a first sheet metal part and a second sheet metal part by bringing the first electrode (122) into contact with the first sheet metal part and the second electrode (112) into contact with the second sheet metal part, the second electrode support (111) comprising an internal passage path for a heat transfer fluid intended to evacuate the thermal energy which accumulates in the second electrode (112) during the welding phases,the upper welding arm (11) comprising an internal supply conduit (111A) for heat transfer fluid to the internal fluid passage path of the second electrode support (111) and a discharge conduit (112A) for heat transfer fluid coming from said internal heat transfer fluid passage path, the second electrode support (111) being mounted in an adjustable manner on the upper welding arm (11), and in that it comprises a rigid fluid connection element (13) secured to the upper welding arm (11).,

A spot welding tip for a short flange of a car body panel may include a tip mounting portion having a cylindrical structure and forming a closed upper surface, and a truncated cone-shaped tip head portion formed in a vertical direction from a center of the upper surface of the tip mounting portion, wherein a fore end diameter of the tip head portion is formed to be smaller than a diameter of the tip mounting portion. A spot welding machine may include and / or operate with the spot welding tip

A resistance welding device. The device includes: a clamp intended to support an arm including a first part supporting a stationary electrode and a second part supporting a translationally movable electrode, the electrodes being intended to be passed through by an electrical current and to clamp metal elements in order to weld them The movable electrode is configured to move between a working position, wherein the electrodes clamp the metal elements to be welded, and two opening positions making it possible to insert, between the electrodes disposed opposite one another, the metal elements to be welded.

System, method, and apparatus for controlling circulation of fluid to, and evacuation of the fluid from, an external fluid circuit for heat transfer. A single control valve selectively stops the circulation of fluid from a supply passageway to an external fluid circuit and diverts fluid to a bypass passageway which creates a suction force at a venturi valve region therein. The venturi valve region includes a fluid jacket that encases at least a portion of the venturi valve region. A suction passageway couples the suction force of bypass passageway to either return passageway or supply passageway, for evacuating fluid from external fluid circuit. No more than a single suction passageway is required to be coupled to either supply passageway and / or return passageway. A return check valve disposed in return passageway prevents backflow of fluid through return passageway.

A solid state welding apparatus comprises a pair of compression bars, a pair of electrodes disposed around the pair of compression bars, respectively, and a controller. The controller controls the pair of compression bars to cause a first load to act on each of the first and second workpieces, subsequently controls the pair of compression bars to subject compressive force to load removal to cause a second load smaller than the first load to act on the first and second workpieces, and subsequently passes a current through the pair of electrodes to remove an impurity on a metal surface.

The present invention relates to a welding apparatus comprising: an upper welding unit including an upper welding rod; a first object to be bonded positioned below the upper welding rod; a second object to be bonded positioned below the first object to be bonded; and a lower welding unit including a lower welding rod positioned below the second object to be bonded, wherein the first object to be bonded and the second object to be bonded are welded by resistance welding of the upper welding rod and the lower welding rod, and the welding apparatus comprises a displacement measuring unit capable of measuring the displacement of a buffer unit provided on at least one of the upper end of the upper welding rod or the lower end of the lower welding rod by additional pressure while the upper welding rod, the first object to be bonded, the second object to be bonded, and the lower welding rod are in close contact with each other.

A spot welding assembly for welding a first work piece to a second work piece. The spot welding assembly includes a base. A base electrode is coupled with the base for supporting the first work piece. A welding gun is moveable toward and away from the base. A gun electrode is coupled with the welding gun for supporting the second work piece and for locating the second work piece against the first work piece upon movement of the welding gun toward the base to allow the first and second work pieces to be welded to one another. The base electrode is rotatable and pivotable relative to the base, and the gun electrode is rotatable and pivotable relative to the welding gun.

To provide a solid phase joint device which can reduce a load applied to workpiece, and a solid phase joint method using the solid phase joint device.SOLUTION: A solid phase joint device includes a pair of pressurization shafts 11 and 12 for pressurizing first workpiece W10 and second workpiece W20 made of metal from both sides in a thickness direction, a pair of electrodes 21 and 22 which are arranged in each periphery of the pair of pressurization shafts 11 and 12, and a control device 30. The control device 30 conducts first current X1 in the pair of electrodes 21 and 22 while making a first load F1 act on each of the first workpiece W10 and the second workpiece W20 and bringing them into contact with each other by controlling the pair of pressurization shafts 11 and 12, and then conducts second current X2 larger than the first current X1 in the pair of electrodes 21 and 22 while making a second load F2 act on each of the first workpiece W10 and the second workpiece W20 by controlling the pair of pressurization shafts 11 and 12.SELECTED DRAWING: Figure 5

The invention relates to a wear electrode for resistance projection welding of studs (9), comprising an electrode body (5) having an opening (12) for inserting a stud (9) and a receptacle (24) formed in the electrode body (5) in which a sleeve (6) is received. According to the invention, the wear electrode has a clamping element (7) by which the sleeve (6) can be pre-tensioned against the electrode body (5). This increases the dimensional stability of the wear electrode.

The present disclosure provides a concentric electrode. The concentric electrode includes a cylindrical base and a tip disposed on the cylindrical base. The cylindrical base extends in the axial direction of the rotating shaft, and the cylindrical base comprises conductive metal. The tip includes a concentric surface extending axially from the cylindrical base and defined by an outer shoulder having an outer diameter and an inner shoulder having an inner diameter. The tip is configured to provide an electrical current to the steel workpiece and remove a coating from at least a portion of the steel workpiece.

Disclosed is a welding apparatus including an upper welding unit including an upper welding rod, a first object to be joined located under the upper welding rod, a second object to be joined located under the first object to be joined, and a lower welding unit including a lower welding rod located under the second object to be joined, wherein the first object to be joined and the second object to be joined are welded to each other by resistance welding using the upper welding rod and the lower welding rod, and a displacement measurement unit configured to measure the displacement of a buffer portion provided on at least one of an upper end of the upper welding rod or a lower end of the lower welding rod by further pressing in the state in which the upper welding rod, the first object to be joined, the second object to be joined, and the lower welding rod face each other in tight contact with each other.

In the coolant drip prevention system (1), one end of the first pipe (4) is connected to a coolant supply pipe (15) on the side of the welding torch (11) with respect to the first stop valve (2). One end of the second pipe (5) is connected to a coolant discharge pipe (16) on the side of the welding torch (11) with respect to the second stop valve (3). One end of the discharge pipe (6) is connected to the coolant discharge pipe (16) on the side away from the welding torch (11) with respect to the second stop valve (3). The pump unit (7) discharges the coolant sucked from the first pipe (4) and the second pipe (5) into the discharge pipe (6).

The invention relates to a resistance welding apparatus comprising a clamp (1) intended to support an arm comprising a first part (1A) supporting a fixed electrode (2) and a second part (1B) supporting a movable electrode (3) in translation, the electrodes (2, 3) being intended to be traversed by an electric current and to grip metal elements to weld them, the movable electrode (3) being configured to move between a working position (P0) in which the electrodes (2, 3) grip the metal elements to be welded and two opening positions allowing the metal elements to be welded to be inserted between the electrodes (2, 3) arranged opposite one another.

The aim of the invention is to improve a method for joining a multilayer component to another component such that the joining method and the preparation of the joint locations can be carried out as quickly as possible and inexpensively using an automatic method. This is achieved in that an intermediate layer (14) of the multilayer component is displaced in the region of the joint location (15) by means of a heating process and by exerting a compressive force (16), and the two outer components (10, 11) of the multilayer component are adhered together by applying an electric voltage (17).

The invention relates to a method for producing a material connection, in particular a welded connection, between an upper joining part (52) and a lower joining part (54), in which the following method steps are carried out: first, the upper joining part (52) is connected to the lower joining part (54); an upper engagement part (52) having a substantially flat first contact surface (66) is arranged above a lower engagement part (54) having a projection or projection (56). The arrangement is then supported by a load-bearing or support structure (50). A punctiform, flat welding head (64) is then positioned above the contact area (70) between the upper joining part (52) and the lower joining part (54). Finally, a material connection, in particular a welded connection, is produced in the contact region (70).

The present invention discloses an upper electrode structure for projection welding of the side wall of a U-shaped part, which relates to the technical field of welding equipment. It includes an upper electrode base. Multiple T-shaped grooves are provided on the top surface of the upper electrode base. An electrode arm is provided on the bottom surface of the upper electrode base. A plurality of cooling water joints are provided on one side of the electrode arm. An overseat is provided at one end of the bottom surface of the electrode arm. An upper electrode head is provided at the lower end of the overseat. A passive strengthening mechanism is provided on the bottom surface of the upper electrode base. The execution end of the passive strengthening mechanism abuts against the top surface of one end of the electrode arm. Compared with the original L-shaped special-shaped upper electrode, the horn-shaped electrode arm has a large eccentric displacement and a relatively uniform output pressure. With the assistance of the passive strengthening mechanism, the types of welded products are increased, and at the same time, the strength of projection welding is greatly improved.

A drive mechanism is capable of moving an electrode relatively to a pressurization shaft in an axial direction. The drive mechanism includes a cylinder and a piston. The cylinder is fixed to the pressurization shaft as surrounding the pressurization shaft and provided with an inner circumferential surface that extends along the axial direction. The piston is accommodated in the cylinder while it is connected to the electrode, and driven by a pressure of fluid. The piston partitions an internal space in the cylinder into a first chamber and a second chamber. As fluid alternately goes in and out of the first chamber and the second chamber, the piston is driven in the axial direction while it slides with respect to the inner circumferential surface, and the electrode is movable in the axial direction together with the piston.

In the prior art, it was necessary to adjust the time required for a measurement operation for moving a welding tip to a prescribed measurement location in order to measure a wear amount.　This device 80 comprises: a measurement operation execution unit 70 that controls a mobile machine 58 so as to execute a measurement operation for moving a welding tip in a first direction to a measurement location; a location data acquisition unit 72 that acquires the location of the mobile machine 58 when the measurement operation has been executed; and a measurement initiation location determination unit 74 that determines, as a measurement initiation location, a location for the mobile machine 58 at which the welding tip is arranged a prescribed distance apart from a first location in a second direction, which is opposite of the first direction, on the basis of the first location which is acquired during a first measurement operation. During a second measurement operation following the first measurement operation, the measurement operation execution unit 70 controls the mobile machine 58 so as to position the mobile machine 58 at the measurement initiation location and then move the welding tip in the first direction.

The spot welding electrode has an active surface (14) for contact with a part to be welded (4, 6), wherein the active surface (14) is convex and profiled along a longitudinal axis (A).

A guide pin made of a heat-resistant hard material and a sliding member made of an insulating synthetic resin material are integrated. An inserted portion and an extended portion are provided in the sliding member. The thickness of the extended portion is set to be thinner than the thickness of the inserted portion. An air passage is formed in the extended portion thereby forming a thin-wall deformable portion. The surface of the thin-wall deformable portion is configured to bulge toward the air passage side when the extended portion is thermally expanded.

The resistance welding device (1) comprises a first electrode (2) having a first contact surface (21) in contact with the workpiece (100) and a second electrode (3) having a second contact surface (31) in contact with the workpiece, the first contact surface having at least one first overlapping portion (22) and at least one first non-overlapping portion (23), the second contact surface has a second overlapping portion (32) and at least one second non-overlapping portion (33), the first overlapping portion and the second overlapping portion overlap in the lamination direction, and the first non-overlapping portion and the second non-overlapping portion do not overlap in the lamination direction.

The application discloses an electrode cap for resistance spot welding, which comprises a front end part, a trunk part and a transition part. The front end part is the part that first contacts the material to be welded during welding, and the outer arc surface of the front end part is formed by rotating a preset circular arc as a generatrix and taking the central axis of the electrode cap as a rotation center. The bottom of the trunk part is provided with a cavity, and the electrode cap is assembled with an electrode rod through the cavity. The outer cylindrical surface of the trunk part is formed by rotating a preset straight line as a generatrix and taking the central axis of the electrode cap as a rotation center. One end of the transition part is connected with the front end part, and the other end of the transition part is connected with the top of the trunk part. The outer arc surface of the transition part is formed by rotating a preset arc line as a generatrix and taking the central axis of the electrode cap as a rotation center, and the preset circular arc and the preset arc line are tangent. The application solves the technical problem of brittle cracks of liquid metal in the welding joint.

A spot-welded joint has a first workpiece (1), a second workpiece (2), and a weld nugget used for fixedly connecting the first workpiece (1) and the second workpiece (2). At least one of the outer surface of the first workpiece (1) and the outer surface of the second workpiece (2) includes a basic surface and an indentation. The indentation has a first surface located in the center and protrudes outwards and a second surface located on the periphery of the first surface and recessed inwardly. The maximum distance h1 between the first surface and the basic surface is smaller than the maximum distance h2 between the second surface and the basic surface. The edge welding of the spot-welded joint is firmer, and the center is thinner, so that the generation of surface cracks and the formation of internal defects are reduced, thereby improving the welding spot strength.

An apparatus and method for fastening dissimilar materials like steel, plastic and aluminum. A resistance welding fastener having multiple layers may be used with or without a sealant. The fastener may be used to form an aluminum covered steel laminate via a hemming pattern of attachment. The fastener may have a solid shaft or have an extended reach and have features for interacting with the welding electrode. A variety of electrode tips may be employed to cooperate with the fastener.

A resistance welding device welds a plurality of stacked welding target members of a workpiece by pressurizing the workpiece and supplying power to the workpiece. The resistance welding device includes at least one electrode that has a tip end surface configured to be in contact with the workpiece and that is configured to pressurize the workpiece and supply power to the workpiece. The electrode has, at an intermediate portion between the tip end surface and a base end of the electrode, at least one slit that opens to an outer circumferential surface of the electrode and that extends in a circumferential direction in a plane intersecting a central axis direction of the electrode.

TITLE: Welding apparatus comprising an arm with a moving electrode. The invention relates to a resistance welding apparatus comprising a clamp (1) for supporting an arm having a first part (1A) supporting a fixed electrode (2) and a second part (1B) supporting a moving electrode (3), the electrodes (2, 3) being designed to carry an electric current and to grip metal elements for welding, the moving electrode (3) being configured to move between a working position (P0) in which the electrodes (2, 3) grip the metal elements to be welded and two open positions allowing the metal elements to be inserted between the electrodes (2, 3) arranged opposite each other. Abstract figure: [Fig. 1]

To provide a versatile welding electrode that enables multiple resistance weld joints and long seam lengths between metal sheets. A welding electrode for resistance welding is comprised of a welding tool at least partially made of a first metal. The welding tool has a contact surface 1 that comes into contact with a workpiece 9 to be welded. The contact surface 1 is made of diamond doped with boron and / or phosphorus.

Welding electrode arrangement with: a first welding electrode (16), comprising: a body (20); and a weld surface (22) for pressing against a first side (84) of a workpiece stack arrangement (80) supported by an end of the body (20), wherein the weld surface (22) comprises a central upright plateau (40) with a plateau surface (52) and a convex dome section (42) surrounding the central upright plateau (40); and a second welding electrode (18), comprising: a welding surface (26) for pressing against a second side (86) of the workpiece stack arrangement (80), wherein the welding surface (26) of the second welding electrode (18) is aligned with the welding surface (22) of the first welding electrode (16) when the welding surfaces (22, 26) of the first and second welding electrodes (16, 18) are pressed against the respective first and second sides (84, 86) of the workpiece stack arrangement (80); wherein the welding surface (26) of the second welding electrode (18) comprises a convex basic welding surface (58) and a plurality of upright circular ribs (60) projecting outwards from the convex basic welding surface (58), such that the upright circular ribs (60) are separated by intervening circular sections (62) of the convex basic welding surface (58); characterized by the fact that the convex dome section (42) of the welding surface (22) of the body (20) of the first welding electrode (16) further comprises a base surface (44) and a plurality of trapezoidal welding surface sections (46) spaced circumferentially on the base surface (44) around the central upright plateau (40), each of the trapezoidal welding surface sections (44) comprising a plurality of transversely directed, upright, curved ribs (48) spaced radially apart along the base surface (44) of the convex dome section (42); wherein a plurality of radial slots (56) communicate with an annular channel surrounding the central upright plateau (40) and extend outwards in the direction of an outer circumference of the base surface (44) of the convex dome section (42), each of the plurality of radial slots (56) extending between two adjacent trapezoidal weld surface sections (44); wherein the diameter of the innermost upright circular rib (60') of the welding surface (26) of the second welding electrode (18) is smaller than the diameter of the plateau surface (52) of the central upright plateau (40) of the welding surface (22) of the first welding electrode (16).

A first electrode coolant path is configured to cool a first welding electrode by liquid coolant flowing from a supply path through the first electrode coolant path to a return path. A second electrode coolant path is configured to cool a second welding electrode by liquid coolant flowing from the supply path through the second electrode coolant path to the return path. Three or more valves are configured to stop or reduce liquid coolant flow through the first or second electrode coolant path and configured to stop or reduce liquid coolant backflow from the return path when the first or second welding electrode is at least partially detached. At least one valve is coupled in the first or second electrode coolant path. A drawback apparatus generates a suction force to draw liquid coolant away from a gap formed when the first or second welding electrode is at least partially detached.