25results about "Rectilinear seam welding" patented technology

The present invention relates to a method for resistance welding of a pipe bend fitting, in which two pipe bend fitting halves are welded together to form one pipe bend fitting using a resistance welding machine, wherein both an internal weld and an external weld occur in three welding phases. The invention also relates to a device, wherein at least two synchronously moving robots position the two pipe bend fitting halves. The resistance welding machine includes a welding section for resistance welding of the fittings, while a control section maintains communication with the synchronously moving robots. The welding current, welding time, and cooling time can be adjusted per welding phase. This leads to increased productivity through simultaneous resistance welding of fittings, and improved weld reliability and durability through triple welding phases.

An electrode tab welding device according to an embodiment of the present invention can weld a plurality of electrode tabs of an electrode assembly. The electrode tab welding device may include a pair of tab guides for collecting the plurality of electrode tabs, a pair of alignment rollers for applying pressure to the plurality of electrode tabs collected by the pair of tab guides and rotating in a direction in which the outermost electrode tab is pressed toward the electrode assembly, and a welding section for welding the plurality of electrode tabs aligned by the pair of alignment rollers.

System and method for indirect resistance welding of a sealing plate to an anchor plate The present invention relates to a system (S1) for indirect resistance welding of a sealing plate (1) of a tank intended to contain liquefied gas, on an anchor plate (22) arranged partly under the sealing plate (1), comprising: - a pair of electrodes and a current generator capable of being connected to the electrodes (41, 42) - a support (5) capable of holding the electrodes relative to each other, - means for positioning the support (5) against the sealing plate (1), capable of positioning a first (41) of the electrodes above the sealing plate (1) and a second (42) of the electrodes above the free portion of the anchor plate (22), and - at least one actuator (9) capable of pressing the first electrode (41) against the sealing plate (1) and the second electrode (42) on the free portion of the anchor plate (22). (Figure 3)

The present invention relates to a method and apparatus for mash welding in steel making, wherein a step of brushing the overlapping areas of sheet metal surfaces (102, 108) before the mash seam welding process of the pair of steel sheets (100, 106) is provided in order to give the surfaces (102, 108) of the overlapping areas increased surface roughness. The apparatus as well is using such application of brushing and mash seam welding. This ultimately results in steel products with greater weld strength, especially for high-strength steels.

A manufacturing method of an optical module including a package and lid, the package having an opening to be sealed with the lid. The manufacturing method includes placing the lid on the package so that the lid covers the opening; putting a metal block on the lid, the metal block having a first surface touching a top surface of the lid; welding the lid to the package using a seam welding machine, the first surface of the metal block touching the top surface of the lid during the welding, the metal block being configured not to interfere the seam welding machine; and detaching the metal block from the lid.

The invention relates to a system (S1) for indirect resistance welding of a sealing plate (1) of a tank configured to contain liquefied gas to an anchoring plate (22) arranged partially below the sealing plate (1), comprising:-a pair of electrodes and a current generator adapted to be connected to said electrodes (41, 42); -supports (5) capable of holding the electrodes relative to each other; -positioning means for positioning the support (5) against the sealing plate (1), capable of positioning a first of the electrodes (41) above the sealing plate (1) and a second of the electrodes (42) above a free portion of the anchoring plate (22); and-at least one actuator (9) capable of pressing the first electrode (41) against the sealing plate (1) and the second electrode (42) against the free portion of the anchor plate (22).

An apparatus for roll forming thermoplastic composites comprises a plurality of thermoplastic composite material spools, a plurality of thermoplastic composite material rollers, a plurality of sheet metal spools, a plurality of welding rollers, an oven, a forming roller, a pair of pinch rollers. The thermoplastic composite material spools retain plies of thermoplastic composite material. The plies flow through the thermoplastic composite material rollers to form a layup. The sheet metal spools retain metal sheets. The metal sheets and the layup flow through the welding rollers to form a metal composite material laminate. The oven heats the metal composite material laminate. The forming roller imparts a curvature to the metal composite material laminate. The pinch rollers receive the metal composite material laminate from the forming roller, pull the metal composite material laminate, and output the metal composite material laminate in a heated and compressed state.

System and method for indirect resistance welding of a sealing plate to an anchor plate. The present invention relates to an indirect resistance welding system (S1) of a sealing plate (1) of a tank intended to contain liquefied gas, to an anchor plate (22) disposed partially under the sealing plate (1), comprising: - a pair of electrodes and a current generator adapted to be connected to the electrodes (41, 42); - a support (5) adapted to hold the electrodes relative to each other; - means for positioning the support (5) against the sealing plate (1), adapted to position a first electrode (41) above the sealing plate (1) and a second electrode (42) above the free portion of the anchor plate (22); and - at least one actuator (9) adapted to press the first electrode (41) against the sealing plate (1) and the second electrode (42) on the free portion of the anchoring plate (22). (Figure 3)

An electrode tab welding device according to an embodiment of the present invention may weld a plurality of electrode tabs of an electrode assembly. The electrode tab welding device may include: a pair of tab guides that gather the plurality of electrode tabs; a pair of aligning rollers that rotate in a direction, in which the outermost electrode tab is pushed toward the electrode assembly, while pressing the plurality of electrode tabs gathered by the pair of tab guides; and a welding part that welds the plurality of electrode tabs, which are aligned by the pair of aligning rollers, to each other.

The invention relates to the technical field of welding devices, and provides a welding machine device with an edge punching function, which comprises an equipment rack, a cleaning rack, a clearing assembly, a position adjusting rack, a welding assembly, an edge punching assembly and a position adjusting assembly, and is characterized in that a feeding rack is fixedly mounted at the input end of the equipment rack, and a discharging rack is fixedly mounted at the output end of the equipment rack; the cleaning machine frame is fixedly installed on the feeding machine frame, the clearing assembly is installed on the cleaning machine frame, the two position adjusting machine frames are vertically symmetrically and fixedly installed in the equipment machine frame, the welding assemblies are installed on the two position adjusting machine frames, the two welding assemblies are symmetrically arranged, the edge punching assembly is installed on the welding assemblies, and the position adjusting assemblies are installed on the equipment machine frame. By means of the technical scheme, the problems that in the welding process in the prior art, due to the fact that lap joint between the two sections of strip steel is not tidy, the welding contact area is not uniform, the welding strength is reduced, and welding of the two sections of strip steel is not firm are solved.

The invention relates to a device (1) for defining the circumference of a sheet-metal cylinder (2), which is produced from a sheet-metal section by rounding, for welding said sheet-metal cylinder to form a container body. It comprises a multiplicity of guide rollers (3) which are arranged in the manner of a ring and enclose a passage opening (4) for the sheet-metal cylinder (2). The guide rollers (3) are supported by a support structure (5), the geometry of which can be adjusted in such a way that the passage opening (4) enclosed by the guide rollers (3) can be changed by adjusting the geometry of the support structure (5). Regions (6a, 6b) of the support structure (5) which support guide rollers (3) are connected to the rest of the support structure via one or more solid joints (8), and the geometry of the support structure (5) is adjusted in that these regions (6a, 6b) are moved with respect to the rest of the support structure using the solid joints (8). Such devices are simple and cost-effective to produce and maintain, and they make it possible, with a relatively simple support structure, to keep the geometry of the passage openings delimited by the guide rollers very close to the ideal body geometry with each adjustment.

An apparatus for roll forming thermoplastic composites comprises a plurality of thermoplastic composite material spools, a plurality of thermoplastic composite material rollers, a plurality of sheet metal spools, a plurality of welding rollers, an oven, a forming roller, a pair of pinch rollers. The thermoplastic composite material spools retain plies of thermoplastic composite material. The plies flow through the thermoplastic composite material rollers to form a layup. The sheet metal spools retain metal sheets. The metal sheets and the layup flow through the welding rollers to form a metal composite material laminate. The oven heats the metal composite material laminate. The forming roller imparts a curvature to the metal composite material laminate. The pinch rollers receive the metal composite material laminate from the forming roller, pull the metal composite material laminate, and output the metal composite material laminate in a heated and compressed state.

This invention relates to an improved method for welding chromium coated steel for 3-piece canmaking and to an apparatus for performing said method.

The present invention relates to a method for resistance welding of a pipe bend fitting, in which two pipe bend fitting halves are welded together to form one pipe bend fitting using a resistance welding machine, wherein both an internal weld and an external weld occur in three welding phases. The invention also relates to a device, wherein at least two synchronously moving robots position the two pipe bend fitting halves. The resistance welding machine includes a welding section for resistance welding of the fittings, while a control section maintains communication with the synchronously moving robots. The welding current, welding time, and cooling time can be adjusted per welding phase. This leads to increased productivity through simultaneous resistance welding of fittings, and improved weld reliability and durability through triple welding phases.

The present invention discloses an electrode cylinder assembly and welding system for ferrosilicon production, which includes a track, an electrode cylinder assembly rack, and an alternating current circumferential seam welding machine. The electrode cylinder assembly rack is slidably arranged on the track, and the alternating current circumferential seam welding machine is arranged on one side of the track. The alternating current circumferential seam welding machine includes two pairs of welding wheels and a welding housing. The rotation directions of the two pairs of welding wheels are opposite, and the disc notch of the electrode cylinder assembly rack is correspondingly arranged with the upper and lower wheel gaps of the two pairs of welding wheels of the alternating current circumferential seam welding machine. Advantages: The electrode cylinder assembly rack is provided to facilitate the disassembly and assembly of the electrode cylinder. It travels along the track and then uses the alternating current circumferential seam welding machine to complete the welding, reducing the personnel input and lowering the labor intensity.

The invention belongs to the technical field of welding devices, and particularly relates to a rolling type welding electrode for high-frequency resistance welding, which comprises a base, sleeves I are slidably connected to two sides of the upper end face of the base, telescopic rods I are slidably connected to inner cavities of the sleeves I, and extrusion rollers are rotatably arranged on one sides of the upper ends of the telescopic rods I; sliding blocks are connected to the two sides of the upper end face of the base in a sliding mode, second sleeves are connected to the upper end faces of the sliding blocks in a sliding mode, second telescopic rods are connected to inner cavities of the second sleeves in a sliding mode, a plurality of electrode rolling bodies are arranged at the upper ends of the second telescopic rods, and a feeding assembly used for sequentially placing the multiple welded pipes between the two extrusion rollers is further arranged on the base. By means of the feeding assembly, the multiple welded pipes can be sequentially placed at the welding positions to be welded, so that the process that a worker manually places the multiple welded pipes at the designated positions one by one to be welded is omitted, and convenience is achieved.

Provided is a welding monitoring apparatus that monitors a welding state of a V-convergence region in which a strip-shaped metal sheet is converged in a V-shape, when the metal sheet is cylindrically formed while being conveyed, and both side edges of the metal sheet are heated and melted in a manner of being butted each other while being converged in the V-shape, such that an electric resistance welded steel pipe is manufactured. This welding monitoring apparatus includes an image capturing unit that captures images of a region including the V-convergence region in time series; and an image processing unit that extracts a welding point based on the images captured in time series and detects the presence or absence and a position of irregular arcing at the welding point or on an upstream side of the welding point.

An electrode tab welding device according to an embodiment of the present invention may weld a plurality of electrode tabs of an electrode assembly. The electrode tab welding device may include: a pair of tab guides that gather the plurality of electrode tabs; a pair of aligning rollers that rotate in a direction, in which the outermost electrode tab is pushed toward the electrode assembly, while pressing the plurality of electrode tabs gathered by the pair of tab guides; and a welding part that welds the plurality of electrode tabs, which are aligned by the pair of aligning rollers, to each other.

The invention relates to a method for manufacturing a metal strip (10), comprising the steps of: - placing an end portion (13) of a first metal strip element (11) and an end portion (14) of a second metal strip element (12) on a flat support (21), juxtaposed in a longitudinal direction, each of the first and second elements having two opposing principal faces (11A, 12A) connected by two longitudinal lateral faces (11B, 12B), the end portion of the first element and the end portion of the second element each being terminated by a transverse end face (11C, 12C), - aligning the longitudinal lateral faces of the first and second elements so that they extend in line with each other, - welding the first and second metal strip elements end-to-end, forming a continuous weld bead extending along the transverse end faces (11C, 12C),across the entire width of the elements. Figure for the abbreviation: 1,

The invention relates to a method for cleaning the surface of a metal wire (2) or metal strip, in particular a metal wire (2) or metal strip used as an intermediate electrode of a roll seam welding machine, wherein the metal wire (2) or the metal strip is guided under tension in the longitudinal direction of the wire or strip along a plurality of stripping bodies (4) arranged spaced apart, one behind the other, in the longitudinal direction of the wire or strip, in such a way that the wire or strip sections (5a-5g) lying between two successive stripping bodies (4) together form an arc-shaped wire section. It has been shown that this enables intensive and reliable cleaning with constant cleaning quality.

To provide an electrode tab welding device and an electrode tab welding method for preventing disconnection of an electrode tab.SOLUTION: The above and other aspects, features and other advantages of the present invention will be more clearly understood from the following detailed description taken in conjunction with the accompanying drawings, in which: The electrode tab welding apparatus may include: a pair of tab guides for gathering the plurality of electrode tabs; a pair of alignment rollers for pressing the plurality of electrode tabs gathered by the pair of tab guides and rotating in a direction in which the outermost electrode tabs are pushed toward the electrode assembly; and a welding unit for welding the plurality of electrode tabs aligned by the pair of alignment rollers.SELECTED DRAWING: Figure 4

To provide a welding machine capable of automatically stop welding in a stop region selected on a welding object part.SOLUTION: The present invention relates to a welding machine (1) for welding at least two welding object parts (2), which is configured to be movable along the welding object parts (2). The welding machine (1) comprises: at least one pair of drive wheels intended to move the welding machine (1); and at least two welding wheels. The welding machine (1) comprises: a control unit (32) capable of controlling current passing through the welding wheels. The welding machine (1) comprises at least one stop device for stopping the welding machine (1) comprising at least one sensor (36) capable of detecting a point on the welding object part (2), The control unit (32) is configured to stop the welding of the welding object part (2) by means of the welding wheel at a predetermined distance from the point.SELECTED DRAWING: Figure 2

To provide a welding machine capable of automatically correcting at least partially parameters of the welding machine, reliably and directly during the welding.SOLUTION: A welding machine (1) of at least two parts to be welded (2), comprises at least one mobile assembly (10). The mobile assembly comprises: at least one pair of drive wheels (12) intended to move the mobile assembly relative to the parts to be welded; and at least one welding head (14) comprising at least two welding wheels (16) and able to generate a weld portion intended to fixedly join the parts to be welded by rolling the welding wheels against the parts to be welded. The welding machine further comprises a control unit (30) of the welding head. The control unit is able to control parameters of the welding machine.SELECTED DRAWING: Figure 2

A method for cleaning the surface of a metal wire (2) or a metal strip, in particular of a metal wire (2) or a metal strip used as an intermediate electrode of a roll seam welding machine, wherein the metal wire (2) or the metal strip is guided under tensile stress in the longitudinal direction of the wire or the strip along a plurality of wiping bodies (4) arranged at a distance one behind the other in the longitudinal direction of the wire or the strip, in such a way that the wire or the strip sections (5a-5g) each lying between two successive wiping bodies (4) together form a bow-shaped wire section. It has turned out that this enables an intensive and reliable cleaning with constant cleaning quality.

The present invention relates to an absorption chiller which comprises an evaporator, an absorber, a regenerator and a condenser and has an absorbing solution and a refrigerant circulating. A heat transfer pipe, which is provided on one or more of the evaporator, absorber, regenerator and condenser, is comprised, and a ductile stainless steel pipe, which has 1% or less of delta ferrite matrix structure on the basis of the grain size area, is applied to the heat-transfer pipe. Therefore, copper-level flexibility can be obtained in comparison with an existing stainless steel pipe.