314results about "Electrode features" patented technology

The bimetallic welding method comprises the steps that a plurality of annular grooves are formed in the surface, welded to a copper plate, of a steel base body, and a plurality of annular protrusions are formed on the surface of the steel base body; the steel substrate is placed on the lower electrode, and the copper plate is placed on the annular protrusion on the surface of the steel substrate; an upper electrode is placed on the copper plate, and set pressure is applied to the upper electrode; after the set pressure is reached, electrifying the upper electrode, and heating the annular bulge on the surface of the steel substrate to a molten or plastic state according to the generated resistance heat, so that the annular bulge is combined with the copper plate to finish welding; according to the double-metal welding method, the high-pressure energy storage welding process is used for replacing an original silver welding process using precious metal such as silver, and the cost is greatly reduced. Brass is used for welding, the welding method can be applied to the working condition higher than 400 bar, the abrasion resistance is high, and the product performance is improved.

Various embodiments relate to a band flash butt welding machine by which it is possible to weld band faces of band ends of at least one band, in particular a saw band, to each other. The band flash butt welding machine comprises clamping elements for clamping the band ends. Furthermore, the band flash butt welding machine comprises aligning elements for aligning the band ends. The second clamping elements can be moved by a drive relative to the first clamping elements in the direction of a longitudinal axis. Two aligning elements are fixedly connected to one another by a coupling device, in particular a bridge part. The coupling device defines the relative alignment of the aligning elements. The second clamping element can be moved relative to the two aligning elements. This design is advantageous for a changeover of the band flash butt welding machine for band ends having a different geometry.

Described herein is an operating unit that can be connected to a wrist of a robot arm, including: a tool, and a supporting structure carrying the tool, wherein the supporting structure includes a connection member via which the operating unit can be operatively connected in a releasable way to said the of the robot arm, wherein the connection member has an opening on an end wall thereof, which is configured to receive a head of a connection device associated to the wrist of the robot arm, and wherein the connection member includes an internal seat accessible through the opening and configured to receive blocking elements carried by the head so as to enable fixing of the operating unit to the wrist of the robot arm.

The invention discloses an electrode cap for controlling resistance spot welding nugget deviation of an aluminum workpiece and a matched welding method, the electrode cap comprises a first cylinder, a geometry and a second cylinder, the geometry is in smooth transition to a welding end face through a cambered surface or a conical surface to optimize current distribution, so that the nugget is promoted to deviate towards a thin plate side in the welding process, and the welding quality is improved. The fusion depth of the thin plate side is effectively increased; in the welding process, the electrode cap is used in cooperation with a traditional spherical electrode cap without special design, and a set of complete welding solution is formed. According to the scheme, three key stages of pre-pressing, power-on welding and cooling are covered, and high efficiency and stability of the welding process are ensured by accurately regulating and controlling parameters of each stage, such as pressure, welding current, power-on duration and cooling time. According to the method, the welding quality of the aluminum alloy workpieces with different thicknesses is improved, the problem of nugget deviation is effectively solved, and a more reliable and efficient welding technology choice is provided for the high-end manufacturing fields of new energy automobiles, aerospace and the like.

The invention discloses a convex spot welding method for a negative collector plate of a large cylindrical lithium battery. The convex spot welding method comprises a resistance welding needle, a battery cell, the collector plate, a steel shell, a resistance welding lower electrode, a circular convex point structure and an elliptical convex point structure, the current collecting plates are divided into a positive current collecting plate and a negative current collecting plate, and the negative current collecting plate comprises a negative current collecting plate with a convex point design, a negative current collecting plate with a round convex point design and a negative current collecting plate with an elliptical convex point design. The welding area of the negative electrode collector plate is designed to be of a convex point type structure, the pseudo soldering rate of the bottom of a resistance welding spot is reduced, the welding area of the bottom of the spot is increased, the internal resistance of the battery is reduced, the purpose of low charging and discharging temperature rise is achieved, the safety performance is improved, and high-rate charging and discharging can be achieved.

The application discloses an asymmetric ring electrode cap, discards the traditional two-side uniform spherical electrode design, and adopts an asymmetric ring electrode structure, specifically, the welding end face diameter of a thin plate side electrode cap is 6-14 mm, the curvature radius is 40-100 mm, three rings are arranged, the inner ring is provided with a conical pit, and the middle ring is in the shape of an isosceles trapezoid; the welding end face diameter of a thick plate side electrode cap is not less than that of the thin plate side and not more than 14 mm, the curvature radius is not less than that of the thin plate side and not more than 100 mm, three rings are also arranged, the inner ring is provided with a conical pit, and the middle ring is in the shape of an equilateral triangle. The ring structure parameters of the two electrode caps are accurately designed to adapt to the welding requirements of plates with different thicknesses, and the welding quality and efficiency are improved. The application is particularly suitable for resistance spot welding of materials such as aluminum workpieces with large thickness ratios.

The utility model discloses a modularized projection welding electrode, which belongs to the technical field of projection welding electrodes, and comprises an electrode main body and a connecting seat, a first mounting groove and a second mounting groove are arranged in the connecting seat, a connecting handle is fixed on the top surface of the electrode main body, a connecting rod is fixed at the upper end of the connecting handle, and the connecting rod is connected with the first mounting groove and the second mounting groove. A clamping groove is formed in the outer side of the connecting rod, a movable sleeve is slidably connected to the inner side of the second mounting groove, the upper end of the connecting rod is matched with the inner side of the movable sleeve in an inserted connection mode, a plurality of first buckles are fixed to the bottom face of the movable sleeve, and two second buckles are fixed to the top face of the movable sleeve. The upper ends of the two second buckles are each provided with an inclined face, and two movable grooves are formed in the upper portion of the outer side of the connecting base. According to the utility model, the electrode main body can be quickly dismounted and mounted, and the problems that the connection through threads needs to be frequently screwed in the mounting and dismounting process, and the process is relatively inconvenient are solved.

The invention provides an electrode holder electrode cap grinding detection method and system based on AI visual diagnosis, through a visual identification system integrated with a light source system, an industrial camera, AI visual processing software, a PLC controller and the like, a robot moves to a camera identification position after grinding of an electrode holder is completed, the robot sends an in-place signal, the visual system carries out photographing identification, and the detection result is obtained. And after identification is completed, an identification result signal is sent to the robot. If the electrode cap grinding is OK, the robot directly returns to the safe standby position and enters the next procedure, and if the electrode cap grinding is NG, the robot stops at the current position, an alarm signal is sent, and manual intervention is conducted. According to the method, 100% real-time feedback and alarm mistake proofing of robot electrode holder electrode cap coping are achieved, compared with a traditional mode, no welding parameter needs to be adjusted, the quality problem caused by parameter change is effectively avoided, meanwhile, welding quality caused by improper electrode cap coping is prevented, the starting rate of whole-line equipment is increased, and the repair cost is reduced.

An electrode conversion apparatus and a nut projection welding machine comprising same. The electrode conversion apparatus comprises: a rotary member (1), wherein two or more electrode arm assembly mounting portions are provided on the rotary member, the electrode arm assembly mounting portions are located at different angular positions of the rotary member, the electrode arm assembly mounting portions are configured to mount electrode arm assemblies (2), and different electrode arm assemblies are provided with electrodes of the same or different specifications; and a rotating driving mechanism, wherein the rotating driving mechanism is connected to the rotary member and is configured to drive the rotary member to rotate so as to realize switching of the electrode arm assemblies. According to the electrode conversion apparatus, welding of various projection welding nuts can be achieved on one welding device without manual electrode replacement or debugging, etc., significantly improving the production efficiency, reducing the number of nut projection welding machines required in a production line, and reducing the costs.

The invention is suitable for the field of metal matrix composite materials, and provides a copper-tungsten boron-containing diamond electric resistance welding electrode and a preparation method thereof, and the electrode material is composed of a copper phase, a tungsten phase and boron-containing diamond powder; the preparation method comprises the following steps: carrying out step-by-step metallization treatment of chemical copper plating and magnetron sputtering nickel on boron-containing diamond powder; the boron-containing diamond powder with the metalized surface and tungsten powder are mixed, subjected to ball milling and then subjected to cold isostatic pressing forming, and a tungsten prefabricated body is obtained; sintering the tungsten preform in a hydrogen or vacuum environment to form a porous tungsten skeleton; and filling pores of the tungsten skeleton through copper infiltration to obtain the copper-tungsten boron-containing diamond electrode material, and finally processing and forming. Through introduction of the conductive boron-containing diamond and a step-by-step metallization process, the contradiction between the conductivity and the wear resistance of a traditional electrode is broken through, meanwhile, the adhesion rate is remarkably reduced, and the method is suitable for welding high-strength steel, plated plates, copper alloys and other easy-adhesion working conditions.

The utility model belongs to the technical field of automatic welding, and particularly relates to a resistance welding electrode and a resistance welding device. The electric connector comprises a lower electrode, the top surface of the lower electrode is provided with a lower semi-circular groove and a terminal groove, the lower semi-circular groove penetrates through the terminal groove, the lower semi-circular groove is matched with a copper wire, the terminal groove is matched with an insertion spring terminal, and the terminal groove is provided with a positioning protrusion corresponding to a hollow hole of the insertion spring terminal; the bottom surface of the upper electrode is also provided with an upper semicircular groove and a receding groove, the upper semicircular groove is matched with the copper wire, a cavity of the receding groove corresponds to the insertion spring terminal, the size of the cavity of the receding groove is larger than or equal to that of the insertion spring terminal, and a pressing groove is further formed between the upper semicircular groove and the receding groove. The welding electrode is used for solving the technical problem that the welding efficiency is reduced due to the fact that the welding electrode of the resistance welding machine in the prior art cannot quickly and accurately position a copper wire and an insertion spring terminal.

The utility model relates to a scrap cleaning device of a sharpening machine, which is characterized in that the upper end face of a rotary cutter sleeve of the sharpening machine is fixedly connected with a guide convex ring through a fastener, and a plurality of troughs are arrayed on the upper end face of the guide convex ring in the circumferential direction; a guide mechanism is installed on a machine body of the sharpening machine, and the guide mechanism can enable the scrap removing head to be close to or away from a sharpening tool of the sharpening machine. The scrap removing head comprises a connecting shaft, the lower end of the connecting shaft is fixedly connected with an inner ring of a large ball bearing, a plurality of radial shafts fixedly connected with the large ball bearing are arrayed in the circumferential direction of the outer ring of the large ball bearing, and each radial shaft is fixedly connected with an inner ring of a small ball bearing. A disc is fixedly connected to the lower end of the outer ring of the large ball bearing, and a plurality of insertion rods are fixedly arranged on the lower surface of the disc; and when the outer rings of the multiple small ball bearings abut against the multiple wave troughs of the guide convex ring correspondingly, the multiple insertion rods can be inserted into gaps among the multiple sharpening knives. According to the utility model, an efficient, safe and reliable scrap cleaning solution can be provided for a spot welding process in a vehicle body workshop.

The invention relates to the technical field of electric welding equipment, and discloses an automatic cleaning device for electrodes of a spot welding machine, which comprises a workbench and further comprises two groups of electrode structures which are symmetrically mounted on the workbench and can be mutually close to or far away from each other for adjustment, each electrode structure comprises an electrode stem and an electrode cap, and a welding area is formed between the two electrode caps; the cleaning structure is arranged on the electrode structure and comprises a scrap collecting plate which is arranged below the electrode rod and can be adjusted to be close to or far away from the axis of the electrode rod, a scraper is installed on the inner wall of the scrap collecting plate, and the tangent plane track of the scraper is the same as that of the electrode cap. The cleaning structure and the electrode rod are integrated, and the time delay assembly is arranged, so that cleaning is started only in a non-spot-welding state, in-situ disassembly-free finishing of the electrode cap is achieved, and the effects that the normal welding rhythm is not affected, manual grinding and frequent electrode replacement are thoroughly omitted, and the continuous operation rate of a production line is remarkably improved are achieved.

The utility model discloses an electrode life protection mechanism for resistance welding, which comprises a welding device and electrode protection mechanisms arranged on the two sides of the welding device, the welding device comprises a base which is horizontally arranged and connected with a rack, the welding device is connected with the base through a vertically arranged connecting plate, and the electrode protection mechanisms are arranged on the two sides of the welding device. An upper welding electrode and a lower welding electrode which are oppositely arranged in the height direction are arranged below the welding device, the electrode protection mechanism comprises copper strip winding wheels symmetrically arranged on the two sides of the welding device, roller supporting plates are arranged on the sides, close to the welding device, of the copper strip winding wheels, and a process protection belt is wound around the copper strip winding wheels. And the process protection belt is arranged between the upper welding electrode and the lower welding electrode through a positioning roller mounted on the roller supporting plate. According to the protective belt, a dirty process welding belt moves in the welding process, a new contact surface is welded in place, a welding electrode is prevented from being polluted, the electrode is prevented from being adhered by a lug and a pole to be welded, and energy consumption in the whole welding process is reduced.

The utility model relates to a spot welding head for double-sided welding, which comprises a connecting seat capable of being connected with a mechanical arm, and a deflection mechanism capable of adjustably driving a spot welding gun body to perform arc rotation is arranged on the bottom surface of the connecting seat. The axial lower end, away from the connecting base, of the deflection mechanism is connected with a transverse movement positioning assembly capable of driving the spot welding gun body to synchronously move on the upper side and the lower side of the thick workpiece. The transverse moving positioning assembly is matched with the deflection mechanism to change the working position of the spot welding gun body according to the mode that the transverse moving positioning assembly drives the spot welding gun body to translate while deflecting along with the deflection mechanism, so that a curve welding path is defined; the spot welding gun body is connected with the transverse moving positioning assembly through a telescopic rod. According to the utility model, the welding treatment of a thick workpiece can be efficiently completed in a double-sided synchronous welding processing mode while continuous multi-point welding processing is carried out on a curve welding seam.

The utility model discloses a screw welding upper electrode structure which comprises an upper electrode shell, a polyurethane insert is embedded in one end of the upper electrode shell, a spring is arranged in the upper electrode shell, a strong magnet located below the spring is further arranged in the upper electrode shell, and the upper electrode shell is provided with a screw. And the other end of the upper electrode shell is provided with a screw piece which extends into the upper electrode shell and is adsorbed by the strong magnet. An insulating rubber ring, a strong magnet and a spring are sequentially placed in an upper electrode cavity, then a polyurethane insert is embedded into the upper surface of an upper electrode, the polyurethane insert extrudes the spring, the spring pushes the strong magnet to abut against the insulating rubber ring, and the insulating rubber ring abuts against the inner wall plane of a second through hole. Then the rod part of the screw piece penetrates into the upper electrode shell from the lower surface of the upper electrode shell, the strong magnet can generate upward attraction force on the screw piece until the head part of the screw piece abuts against the end face of the upper electrode shell, clamping force is formed by the strong magnet and the end face of the upper electrode shell, and the screw piece can be fixed in the upper electrode shell.

The utility model discloses a concrete pole reinforcement cage seam welder electrode disc which comprises a disc body, conductive rollers and supporting shafts, a plurality of notches are formed in the outer circumferential wall of the disc body, the supporting shafts are installed in the notches, and the conductive rollers are rotatably installed on the supporting shafts. The multiple notches are formed in the outer circumferential wall of the disc body, the supporting shafts are installed in the notches, the conductive rollers are rotationally installed on the supporting shafts, in the using process, a main steel bar is supported on the conductive rollers, the conductive rollers roll along with the main steel bar, friction between the electrode disc and the main steel bar is reduced, and the service life of the electrode disc is prolonged.

The utility model discloses a resistance welding electrode cap dismounting device which comprises an abutting block, the inner surface of the abutting block is fixedly connected with a fixing column, the outer surface of the fixing column is rotationally connected with a sleeve frame, the outer surface of the abutting block is fixedly connected with a connecting rod, and the end, away from the abutting block, of the connecting rod is fixedly connected with a limiting block. A first spring is fixedly connected to the side surface of the limiting block, a sleeve is fixedly connected to the end, away from the limiting block, of the first spring, and a guide rod is slidably connected to the inner surface of the limiting block. Through the arrangement of the sleeve and the adjusting assembly, the overall length of the connecting rod can be adjusted, so that larger torque is provided for an operator when the electrode cap is disassembled, the operator can disassemble the electrode cap more easily, and the working efficiency is improved; and the connecting rod can be conveniently stored in the sleeve, so that the occupied space of the whole device is reduced, and the flexibility during storage is improved.

The invention relates to welding equipment for a temperature control element of a thin film heater, which is applied to the technical field of temperature control element welding and comprises a resistance welding machine provided with an upper electrode and a lower electrode and a welding aid mechanism, the welding aid mechanism comprises a supporting plate, and the bottom end of the supporting plate is fixedly connected with a lower connecting cylinder matched with the lower electrode; the outer wall of the lower connecting cylinder is movably sleeved with a conducting ring matched with the lower connecting cylinder, the outer wall of the conducting ring is fixedly connected with a C-shaped conducting rod, the conducting rod is fixedly provided with a lower-generation level head, the lower-generation level head is located above the supporting plate, and the bottom end of the lower-generation level head abuts against the top end of the supporting plate; according to the welding equipment, the lead of the temperature control element can be welded to the heating circuit in the film heater in an electric resistance welding mode, compared with tin soldering and electric resistance welding, higher welding strength and better high temperature resistance are achieved, the problem that a welding spot is softened and fails due to high temperature can be effectively solved, and the welding quality is improved. And the reliability of the temperature control system can be obviously improved.

The invention belongs to the technical field of welding and connection, and relates to a method for improving conductivity and anti-sticking property of an aluminum alloy resistance spot welding electrode, which comprises the following steps: preparing three areas of an electrode end surface layer, a transition layer and an electrode substrate, and then carrying out integral hot pressing sintering and backward extrusion forming to prepare a composite electrode material. The tungsten carbide is added to improve the wear-resistant and anti-sticking performance of the end face of the electrode, and the graphene is added to improve the conductivity of the electrode; a transition layer is arranged between the electrode substrate and the end surface layer so as to reduce the thermal stress fatigue of the electrode; through backward extrusion process forming, the electrode composite material after hot pressing sintering can be further compacted, the bonding strength of a composite electrode material interface is improved, the dispersion distribution state of graphene in a copper-chromium-zirconium matrix is improved, and the uniformity and conductivity of the material are improved. Compared with a conventional chromium-zirconium-copper electrode, the method has the advantages that the wear resistance of the electrode can be improved by more than 30%, the electric conductivity is improved by about 10%, and the number of continuous spot welding times of the electrode in the spot welding process of the aluminum alloy is increased by more than 35%.

The utility model relates to the technical field of welding equipment, and discloses a clamp arm reinforcing structure which comprises a reinforcing structure body, the reinforcing structure body comprises two side plates, reamed hole bolts are evenly arranged on the opposite sides of the side plates, flat gaskets are arranged at the two ends of the reamed hole bolts, and the two ends of the reamed hole bolts are connected with the reinforcing structure body. Supporting columns are uniformly arranged on the opposite sides of the side plates through second bolts, spring washers are arranged on the sides, close to the side plates, of the second bolts, heightening blocks are symmetrically arranged on the opposite sides, away from the supporting columns, of the side plates through first bolts, and insulating sleeves are arranged on the sides, close to the side plates, of the first bolts; an insulation adjusting plate is arranged on the side, close to the side plate, of the heightening block. According to the utility model, the two side plates are connected through the plurality of reamed hole bolts and the flat gaskets, and the two side plates are arranged in the middle of the rocker arm assembly through the reamed hole bolts and the supporting columns, so that the problem that the welding pressure and the centering performance of the welding tongs are poor under the large window size of the conventional welding tongs structure can be solved.

The purpose of the present invention is to provide a shunt electrode device for projection welding, a projection welding machine and a projection welding method to address the deficiency that the welding quality of a desired welding point of a workpiece cannot be detected during projection welding in the prior art. The shunt electrode device for projection welding comprises a main electrode and a sub-electrode. There are at least two sub-electrodes, which are located on the surface of the main electrode, fixedly connected to the main electrode and conducting current. The projection welding machine comprises an electrode device and a current sensor. The shunt electrode device and the projection welding method are adopted. A main electrode and at least two sub-electrodes are provided. The main electrode is electrically connected to each sub-electrode, and power is supplied to the main electrode and thus to each sub-electrode. The shunt electrode device for projection welding, the projection welding machine and the projection welding method of the present invention improve production efficiency and avoid waste. The quality of welding is reflected according to the welding current, so that the detection of the welding structure and welding are carried out simultaneously, and defective products can be discovered in time.

The utility model aims to provide a split electrode for a split-flow type electrode device aiming at the requirement that the split-flow type electrode device for a projection welding machine adopts a split electrode split-flow type structure, and the split electrode for the split-flow type electrode device for projection welding comprises a split electrode body, the branch electrode comprises a branch electrode body, the branch electrode body is provided with a total electrode connecting surface used for being electrically connected with a total electrode, the total electrode connecting surface is provided with a boss protruding downwards, and the boss is used for arranging a current sensor. The space occupied by the current sensor sleeving the surface of the sub-electrode is omitted, the sub-electrode keeps more current space corresponding to the position of the bump, the structure of the sub-electrode is simplified, the current sensor is positioned through the connecting seat and the boss, the position of the current sensor can be stable, and the sub-electrode can be conveniently connected with the total electrode.

The utility model discloses a kind of automatic cap changer for uncertain length electrode cap, including body support and the cap-off mechanism and cap installation mechanism being set on body support, the cap installation mechanism includes the cartridge loaded with the electrode cap to be installed, cartridge center is provided with middle shaft, cartridge is rotatably connected between middle shaft, rotating mechanism for rotating cartridge to switch electrode cap is set in cartridge, setting mechanism is set below cartridge for pushing electrode cap to lift in cartridge, and the upper end of electrode cap is kept at the same height position;The utility model can make the height position where electrode cap end is kept consistent when installing electrode cap each time by setting setting mechanism, not affected by the length of electrode cap itself, robot welding tongs can use uncertain length electrode cap when cap installation under the same trajectory each time, realize the purpose of automatic replacement electrode cap.

The utility model relates to a resistance welding electrode tip structure, which consists of a spot welding electrode tip and an electrode stem, and is characterized in that the spot welding electrode tip is in threaded connection with the electrode stem, a flange table of 1mm is arranged at the bottom of the thread of the electrode tip in the circumferential direction, the electrode tip and the electrode stem are fastened through threads, and the flange table of the electrode tip is attached to a flange table at an inner hole of the electrode stem. The vertical force of spot welding is borne, and the electrode tip is embedded into the electrode rod by 5 mm. Inclination and looseness of the electrode tip caused by tangential force generated by the die repairing electrode tip are avoided, and the position precision of spot welding is enhanced. The structure is simple and dismounting is convenient.

A resistance welding device is provided that can join fastening members to the bottom wall and side wall of a workpiece. [Solution] The resistance welding device (1) includes a first electrode (10), a second electrode (20) that moves toward and away from the first electrode in a first direction (Z), and a conductive adapter (30) that moves in a second direction (X) that intersects the first direction. The adapter advances to a first position (P1) between the first and second electrodes by moving toward one side (Xa) in the second direction, and retreats to a second position (P2) away from the first position by moving toward the other side (Xb) in the second direction. The adapter includes a base (31) extending in the first direction, a first extension (36) extending from the first electrode side of the base in the first direction to one side in the second direction, and a second extension (37) extending from the second electrode side of the base in the first direction to one side in the second direction.

The present invention provides a welding element and a welding electrode for resistance spot welding of dissimilar metals. The welding element welds first and second metals having a melting point difference greater than 700°C. The shaft of the welding element pierces the first metal with a lower melting point and forms a weld nugget with the second metal, thereby firmly welding the first metal. During welding, the auxiliary deformation zone of the cap structure preferentially undergoes plastic deformation, allowing the cap structure to maintain a thin-walled cavity structure and thereby fully accommodate the molten first metal discharged from the weld point. The provided welding electrode further facilitates the formation of the cap structure of the welding element, controls the height of the cap structure, and improves the forming quality of the weld point.

The utility model relates to a welding electrode structure and welding equipment. The welding electrode structure comprises an electrode arm, an electrode cap, a clamping plate, a sleeve and a nut, a mounting hole is formed in one end of the electrode arm; one end of the electrode cap is inserted into the mounting hole, and an annular groove is formed in the side surface of the electrode cap; a clamping opening is formed in the clamping plate, and the clamping plate is clamped on the annular groove through the clamping opening; the sleeve is arranged on the electrode cap in a sleeving manner, and external threads are arranged on the sleeve; and the nut is screwed on the sleeve. The welding electrode structure is provided with the clamping plate, the sleeve and the nut, the sleeve is in threaded connection with the nut, and the clamping plate is clamped on the electrode cap to limit the sleeve and the nut between the electrode cap and the electrode arm; when external force is applied through a wrench to enable the nut to rotate relative to the sleeve, the overall length of the structure composed of the sleeve and the nut is increased, so that axial force is applied to the clamping plate, the electrode cap connected with the clamping plate in a clamped mode is ejected out of the mounting hole, disassembly is efficient, and the electrode cap is not prone to being damaged.

To provide a resistance-welding method which can suppress electric resistance of an electrode from increasing at an initial stage after electrode change and can improve weld quality at the initial stage after the electrode change.SOLUTION: A resistance-welding method repeatedly performs after exchanging a pair of electrodes (fixed electrode 1 and movable electrode 2) of a resistance-welding device 10: a welding step (S103) where member W to be welded is sandwiched and compressed between the pair of electrodes (fixed electrode 1 and movable electrode 2) to perform electric welding; and alignment step (S104) after welding where rotating alignment tool 21 is pushed against each tip of the pair of electrodes (fixed electrode 1 and movable electrode 2) for alignment. After exchanging the pair of electrodes (fixed electrode 1 and movable electrode 2) and before welding the member W to be welded at the first time, alignment step (S102) before welding is provided where the rotating alignment tool 21 is pushed against each tip of the pair of electrodes (fixed electrode 1 and movable electrode 2) for alignment.SELECTED DRAWING: Figure 3