61results about "Pressure electrodes" patented technology

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.

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.

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 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 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]

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 metal joined body has an iron base body and an aluminum base body that are joined together via a joint layer. The joint layer has a first layer composed of a first intermetallic compound formed on the iron base body side and a second layer composed of a second intermetallic compound formed on the aluminum base body side. The first layer has one or more first protrusions that merge integrally into the iron base body and extend in a pile shape into the first intermetallic compound. The second layer may have one or more second protrusions that are composed of a second intermetallic compound and extend in a columnar shape into the aluminum base body. The first intermetallic compound may contain Al5Fe2, and the second intermetallic compound may contain Al3Fe. The total thickness of the first layer and the second layer is, for example, 2 to 15 μm.

A concentric electrode is provided. The concentric electrode includes a cylindrical base and a tip disposed on the cylindrical base. The cylindrical base extends axially along an axis of rotation, and the cylindrical base includes a conductive metal. The tip includes a concentric surface extending axially from the cylindrical base and defined by an outer shoulder having an outside diameter and an inner shoulder having an inside diameter. The tip is configured to provide an electrical current to a steel workpiece and purge a coating from at least a portion of the steel workpiece.

A spot-welded joint and a manufacturing method therefor. The spot-welded joint comprises 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) comprises a basic surface and an indentation, wherein the indentation comprises a first surface (111) which is located in the center and protrudes outwards and a second surface (112) which is located on the periphery of the first surface (111) and recessed inwardly, and the maximum distance hl between the first surface (111) and the basic surface is smaller than the maximum distance h2 between the second surface (112) 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.

Wear electrode for resistance projection welding of bolts (9), with - an electrode body (5) which has an opening (12) for inserting a bolt (9), - a receptacle (24) formed in the electrode body (5), - wherein a sleeve (6) is received in the receptacle (24), characterized in that - that the wear electrode has a clamping element (7) which engages in threaded engagement with the electrode body (5) so that it can clamp the sleeve (6) against the electrode body (5).

The present invention relates to a welding apparatus comprising an upper welding section including an upper welding rod, a first workpiece located below the upper welding rod, a second workpiece located below the first workpiece, and a lower welding section including a lower welding rod located below the second workpiece, wherein the first workpiece and the second workpiece are welded by resistance welding of the upper welding rod and the lower welding rod, and the welding apparatus is equipped with a displacement measuring unit that can measure the displacement of a buffer portion provided at least one of the upper end of the upper welding rod or the lower end of the lower welding rod by additional pressing while the upper welding rod, the first workpiece, the second workpiece, and the lower welding rod are in close contact and facing each other.

The electric resistance welding device welds a plurality of pieces to be welded by applying pressure to a workpiece (100) comprising a plurality of stacked pieces to be welded (101, 102) and supplying power to the workpiece. An electric resistance welding device is provided with an electrode (2) which has a tip surface (211) that comes into contact with a workpiece and which pressurizes and supplies power to the workpiece, and in which slits (41-44) are formed in an intermediate section between the tip surface and the base end of the electrode, the slits (41-44) open on the outer peripheral surface of the electrode and extend in the circumferential direction on a surface intersecting the direction of the center axis (X) of the electrode.

The present invention provides a robot control device and a spot welding system that are capable of roughening the surfaces of electrodes without requiring additional special devices or effort. The robot control device controls the operation of a robot that comprises a spot welding gun having a pair of electrodes positioned facing each other. The robot control device has a robot operation control unit that moves the pair of electrodes of the spot welding gun to a blade polishing position so that the surfaces of the pair of electrodes are polished by a rotating blade of an electrode polishing device. The robot control device changed the position of the pair of electrodes in contact with the blade from the polishing position so as to scratch the surfaces of the pair of electrodes after the polishing by the blade.

An electrode tip for resistance spot welding includes a main body with tip and base portions. The tip portion has a bottomed and substantially cylindrical shape. The base portion has a substantially cylindrical shape and merges into the tip portion. The main body is made of a copper alloy such as chromium copper. The tip portion has a bottom part and a barrel part. The bottom part has a pressure-contact surface that is not recessed with respect to a workpiece to be pressed. The barrel part has a substantially cylindrical shape and merges into the bottom part. The electrode tip may have an inner diameter ratio (inner diameter of the barrel part to an outer diameter of the base portion) of 0.4 to 0.6, and may also have a bottom thickness ratio (thickness of the bottom part to the outer diameter of the base portion) of 0.15 to 0.5.

Fully automated process for producing a measuring electrode for electrochemical measurements in a measuring fluid, wherein the following steps are carried out in the process: (a) a first gripper (11) places a sensor material body (5) into a joining receptacle (10), (b) the sensor material body (5) is fixed to the joining receptacle (10) by means of suction force, (c) a second gripper (12) positions a piece of line (6) made of electrically conductive material relative to, preferably on, the fixed sensor material body (5), (d) the positioned line piece (6) is materially connected to the fixed sensor material body (5) by means of a joining tool (20) in order to obtain a sensor assembly (5, 6), (e) a tubular body (1) having an end opening (1a) in a front tubular body region is held by means of a chuck (15), (f) the sensor assembly (5, 6) and / or the tubular body (1) is / are positioned such that the sensor material body (5) faces the opening (1a) and the line piece (6) projects through the opening (1a) into the tubular body (1), (g) the tubular body (1) is connected in the region of the opening (1a) by means of a melt connection (S1) and / or material bond with the sensor material body (5) in a fluid-tight manner around the opening (1a), (h) a connecting cable (7) made of electrically conductive material and a shrink body (8) are inserted into a tubular auxiliary tool (23), (i) the auxiliary tool (23) with the connecting cable (7) and the shrink body (8) are inserted into the pipe body (1) which is open at a rear end and moved in the direction of the cable section (6), thereby bringing the connecting cable (7) and the shrink body (8) into overlap with the cable section (6), (j) wherein the auxiliary tool (23) surrounds the connecting cable (7) and the shrink body (8), preferably shrink tubing, and (k) the shrink body (8) is shrunk in the overlap by heating, so that the shrunken shrink body (8) presses the cable piece (6) and the connecting cable (7) together lengthwise and thereby connects it in an electrically conductive manner.

The present disclosure provides a resistance spot welding method and a resistance spot welding device capable of suppressing cracks in a high tensile strength steel sheet without being limited by the material. The resistance spot welding method according to one aspect of the present disclosure includes a welding process of welding a workpiece made of a plurality of steel sheets by a resistance spot welding device. The resistance spot welding device includes a first electrode in contact with a first steel sheet, the first steel sheet being a high tensile strength steel sheet among the plurality of steel sheets, and a second electrode in contact with a second steel sheet and sandwiching the workpiece together with the first electrode, the second steel sheet being a steel sheet having a tensile strength lower than that of the first steel sheet among the plurality of steel sheets. In the welding process, the first steel sheet is compressed in a direction intersecting a thickness direction of the first steel sheet at least from a start of welding of the workpiece to an end of the welding of the workpiece.