69results about "Roller electrodes" patented technology

A welding system having welder with an electrode for creating a weld. The welding system may include a sensor for monitoring the weld. A method of monitoring a weld is also provided.

A method for weldbonding together metal sheets includes applying adhesive on the surface of a first sheet and placing a second sheet atop the first sheet. The sheets are heated at a selected location to a high temperature forming a metallic weld nugget between the first sheet and the second sheet. The adhesive may be a heat curable adhesive that is cured by the heat, or the adhesive may be heated at ambient temperatures. One or both of the sheets is then cooled in the area surrounding the selected location of heating so that the high temperature needed to created the metallic weld nugget is prevented from transferring so far beyond the selected location as to overheat the adhesive layer and thereby degrade the quality of the adhesive bond.

A resistance welding apparatus having a pair of programmable ball electrodes carried on universally movable positioners. The positioners are programmed to move the ball electrodes simultaneously along a seam line so that the ball electrodes clamp and support opposite sides of a pair of stacked workpieces and are electrically charged to form resistance seam welds along the seam lines to connect the workpieces.

Disclosed are a butt welding apparatus, a butt welding method, and a product manufactured by the butt welding method. Two electrode rollers (3, 4) are disposed on both the front and back sides of a thick sheet member (1) and on both the front and back sides of a thin sheet member (2) whose end surfaces (1A, 2A) are butted. The electrode rollers (3, 4) are applied with power, melt the butt portion (6) of the sheet members (1, 2) with electric resistance heat, and joint the butt portion. Further, the electrode rollers (3, 4) have a length bridging across the sheet members (1, 2) and are composed of first portions (3A, 4A) arranged as small diameter portions on the side of the thick sheet member (1) and second portions (3B, 4B) arranged as large diameter portions on the side of the thin sheet member (2). The first portions (3A, 4A) come into contact with the thick sheet member (1) and presses it before the second portions (3B, 4B) come into contact with the thin sheet member (2). Thus, the end surface (1A) of the thick sheet member (1) swells and deforms toward the thin sheet member (2) and reliably comes into contact with the end surface (2A) of the thin sheet member (2). As a result, power is applied between the end surfaces (1A, 2A) even if the end surfaces (1A, 2A) are not finished by polishing and the like.

The present invention is a butt welding apparatus and a butt welding method where end faces of at least one plate member to be welded are butted to each other to form a butt portion, and butt welding can be performed on respective plate members to be welded which have various thickness sizes on both side portions of the butt portion with electric resistance heat by a pair of two electrode members which are made common to the respective plate members and are supplied with power. At least one electrode member (1) of a pair of electrode members (1, 2) for butt-welding two plate members (31, 32) is provided on an outer face thereof with a retreating-shaped portion (1A) which gradually retreats from one plate member (31) of the two plate members (31, 32) according to extension from an intermediate portion, in a thickness direction, of the one electrode member (1) along the one plate member (31). Butt welding of the two plate members (31, 32) is performed in a state that the position of the butting portion (71) of these plate members (31, 32) has been offset from intermediate portions, in thickness directions, of the electrode members (1, 2) to the retreating-shaped portion (1A) by an amount (L1) corresponding to a difference in thickness between the plate members (31, 32), and butt welding of two other plate members having different thickness sizes is performed with a changed offset amount.

Shifts of a reference point C in a robot coordinate system among three postures of a seam welding apparatus 10 are found, and calibration data is obtained (STEP 1). Correction data is found from the calibration data based on deformation of elastic units 22a due to weight of the seam welding apparatus 10 in accordance with the posture of the seam welding apparatus 10 relative to a robot 20 (STEP 5). Teaching data is corrected based on the correction data (STEP 6).

In order to solve the problem of providing a seam welding device that is not affected by the surface condition or the entire body shape of a piece of work, a seam welding apparatus (10) is provided with: a pair of rotary electrodes (31, 32), an electrode support frame (37), a distance measuring means (50), and a control unit (43). The electrode support frame (37) supports the pair of rotary electrodes (31, 32). The distance measuring means (50) is provided to the electrode support frame (37), and measures the distance to an edge (61a) of a steel plate (61). When a real distance measured by the distance measuring means (50) deviates from a prescribed distance, the control unit (43) controls a robot (20) to adjust the travelling direction of the rotary electrodes (31, 32) such that the deviation reaches zero. Thus, the provided seam welding apparatus (10) has a reduced size whilst not being affected by the surface condition or the shape of a piece of work (steel plate (61)).

A method and apparatus for manufacturing an exhaust pipe assembly for an engine which are capable of decreasing a temperature difference between a seam-welded outer surface and a seam-welded inner surface at the time of seam welding. An exhaust pipe assembly manufacturing apparatus 70 comprises an outer circumferential electrode wheel 71 abutted on an outer circumference of a mounting ring 41, a pressing means 102 pressing the outer circumferential electrode wheel 71 to the mounting ring 41, an inner circumferential electrode wheel 103 abutted on an inner circumference of a pipe 40 making up an exhaust pipe assembly 26, a transformer 104 serving as a voltage supply means for supplying a predetermined voltage to the outer and inner circumferential electrode wheels 71 and 103, and a controller 105 for control of voltage of the transformer 104. Thickness T1 of the outer circumferential electrode wheel 71 is formed larger than thickness T2 of the inner circumferential electrode wheel 103.

A seam welding system includes a pair of roller electrodes. The pair of roller electrodes hold a to-be-welded object between circumferential surfaces of the roller electrodes, rotate while holding the to-be-welded object between the circumferential surfaces, and perform seam welding on the to-be-welded object when a current flows between the roller electrodes while rotating and holding the to-be-welded object between the circumferential surfaces. To an electrode movement mechanism, the roller electrodes are mounted. The electrode movement mechanism moves the roller electrodes along a welding line of the to-be-welded object. Drive sources respectively rotate the roller electrodes and a joint of the electrode movement mechanism. A controller controls an amount by which the roller electrodes rotate based on a torque change in the drive sources so as to keep torques respectively acting on the roller electrodes within a predetermined range.

Apparatus for welding continuous strips wound on a support ring is disclosed, comprising at least means for feeding the strips to be wound on the support ring, an assembly for winding said strips, an assembly for applying radial pressure onto the strips, comprising a first circular jaw and a second circular jaw, which are arranged opposite each other and spaced in the longitudinal direction by an amount corresponding to the width of the finished seal, and an assembly for welding one of said strips, said pressing assembly and said welding assembly being coaxial, wherein said welding assembly comprises a first electrode and a second electrode which are arranged inside the jaws of the pressing assembly so as to face each other and have a diameter smaller than that of the said jaws, each electrode being insulated both from the other electrode and from the jaws by means of rings made of insulating material, and wherein the electrodes act simultaneously with pressure in the radial direction on the strips.

The invention discloses a cooling water circulation structure of a seam welder, which is simple in structure, is capable of effectively improving the service life of the welding wheel and the use ratio of cooling water, and relates to the improvement of a welding wheel cooling structure of the seam welded. The seam welder comprises a welding wheel, an internal cooling handpiece shaft and a welding wheel seat provided with a shaft sleeve, further comprises a cooling water circulation structure which is arranged in the central hole of the internal cooling handpiece shaft; the cooling water circulation structure comprises a flushing connector outer pipe and a flushing connector inner pipe, and the flushing connector outer pipe is fixedly arranged in the central hole of the internal cooling handpiece shaft; the inner diameter of the flushing connector outer pipe is greater than the outer diameter of the flushing connector inner pipe, and the flushing connector inner pipe is arranged in the flushing connector outer pipe. The cooling water circulation structure is arranged in the central hole of the internal cooling handpiece shaft, and water is fed in the flushing connector inner pipe and drained by the flushing connector outer pipe, so that the heat quantity of the welding wheel can be effectively changed, the water resources can be recycled simultaneously, and the cost can be saved.

The invention discloses a 300-series stainless steel Tyler double-welding-wheel resistance seam welding process which is characterized by adopting welding process parameters controlled during Tyler double-welding-wheel resistance seam welding comprising welding current, welding speed, overlap amount, No.1 welding wheel pressure, and No.2 welding wheel pressure, wherein the welding speed is 750cm/min, the overlap amount is 2mm, the No.1 welding wheel pressure is 950kg, the No.2 welding wheel pressure is 950kg, and a value of the welding current is adjusted according to the thickness of 300 stainless steel strip steel. The 300-series stainless steel Tyler double-welding-wheel resistance seam welding process provided by the invention has the beneficial effects that the 300-series stainless steel Tyler double-welding-wheel resistance seam welding process parameters with the thickness being smaller than or equal to 1.5mm are provided, and the welding current and the welding seam overlap amount are set according to the strip steel thickness, so that the welding seam fusion performance is improved, the welding seam strength and toughness can be optimized, a welding seam is flat and smooth, the occurrence of the phenomena such as cracking, incomplete fusion, lack of penetration and weld penetration is avoided, the production processing demand of an annealing-pickling production line ismet, the product quality is ensured, and the yield is improved.

The invention discloses a volute welding device. The volute welding device comprises a frame body, a seam welding device, a positioning clamping device and a first driving device used for driving thepositioning clamping device to rotate; the positioning clamping device comprises a positioning clamping support seat, an inner supporting mechanism and an outer pressing mechanism used for pressing the outer wall of the welded volute, and an electrode matched with the shape of the inner wall of the welded volute is arranged on the inner supporting mechanism; the seam welding device comprises a welding machine and two seam welding mechanisms which are connected with the wiring end of the welding machine and are used for welding the welded volute, the two seam welding mechanisms rotate along with the rotation of the welded volute. During use, the welded volute is fixed in a spot welding mode, then the welded volute is fixed on the volute welding device, and can be welded and rotated to be matched with the work of a weld joint mechanism, so that automatic machining is realized, the labor intensity of workers is reduced, the production efficiency is improved, the weld joint is attractive and uniform, the weld joint strength is large, the connection is stable, the weld joint sealing performance is good, the leakage is avoided, the subsequent sealing treatment does not need to be subjected, and the volute welding device can be widely applied to the welding of volute.

A novel resistance seam welding process for galvanized sheet fuel tanks is characterized by including the steps of allowing an anode copper wire roller (1) to convey an anode copper wire (4) to an anode conducting welding roller (2), and allowing the anode conducting welding roller (2) to transfer current of a transformer as welding current to firmly weld two galvanized sheets (5) through the anode copper wire (4). A novel resistance seam welding device is characterized by comprising the anode copper wire roller (1), the anode conducting welding roller (2), an anode power tension roller (3), the anode copper wire (4), a cathode copper wire roller (10), a cathode conducting welding roller (20), a cathode power tension roller (30) and a cathode copper wire (40). The novel resistance seam welding process has the advantages that no manually removing the galvanized layer at the welded part by a grinding machine or welding the seam by a seam welding machine is needed; the step of zincing the seam is omitted; accordingly, processing steps are decreased greatly, manpower sources are saved, and rust resistance of the galvanized sheets are kept intact.

The invention discloses a reinforcement cage welding tool and a fixed electrode thereof. The fixed electrode of the reinforcement cage welding tool comprises an electrode base body and a conductive part. The electrode base body is mounted at one end of a seam welder spindle. The conductive part is detachably and fixedly mounted on the electrode base body. A peripheral contour base line of the conductive part is matched with a peripheral contour base line of a reinforcement cage workpiece to be welded. The conductive part is provided with locating structures for reinforcement cage workpiece main reinforcement steel bars and can be electrically connected to one power output end of the welding tool through the electrode base body or a conductive mechanism arranged on the electrode base body.Through the reinforcement cage welding tool and the fixed electrode thereof, the problem that a fixed electrode is corroded in the manufacturing process of a reinforcement cage and needs to be integrally replaced is solved, and the purpose of reducing the production cost is achieved.

The invention provides an electrode for roll welding between a titanium alloy plate and a stainless steel mesh. The electrode comprises a first disc body and a second disc body, wherein the first disc body and the second disc body are integrally molded; and the diameter of the second disc body is larger than the diameter of the first disc body, the two sides of the bottom of the second disc body are inclination faces, and two corners at the edge of the end of the second disc body are profile bevels. By means of the manufactured electrode, the probability of wire breakage of the mesh in the roll welding process can be effectively decreased, and the percent of pass of products is improved.

The invention provides a resistance welding electrode capable of conducting locating. The resistance welding electrode capable of conducting locating is suitable for sheet metal, the lap joint sizes are identical, the number of the production steps can be reduced, and labor intensity can be relieved. The resistance welding electrode capable of conducting locating comprises an upper electrode body and a lower electrode body assembly. The upper electrode body is located above the lower electrode body assembly and can move vertically relative to the lower electrode body assembly. The lower electrode body assembly comprises a lower electrode body, a locating block and a shaft pin, the lower electrode body is arranged on the locating block through the shaft pin, the locating block is provided with a first locating groove, a second locating groove, a flow channel, an electrode hole and a plurality of fixing holes, the first locating groove and the second locating groove are located in the two side surfaces of the locating block, the fixing holes are formed in the upper surface of the locating block, the electrode hole is formed in one end of the locating block, the flow channel is located in the locating block, the first locating groove inclines downwards, and the second locating groove inclines upwards. By the adoption of the resistance welding electrode capable of conducting locating, the product quality is improved, the production cost and the labor intensity are lowered, and production efficiency is improved.