743 results about "Seam welding" patented technology

An apparatus and method for making a seam-welded steel pipe free of untempered martensite without seam anneal. The method includes selecting a steel containing a carbon concentration below a predetermined level, for example, 0.14% or 0.12% by weight. The method also includes flooding both outside and inside of the strip with a coolant while the weld seam is being formed, and continuing to immerse the welded strip for a sufficient time after the weld seam is formed to prevent the formation of untempered martensite. The apparatus includes a heater capable of heating the strip to a temperature sufficient to form a welded seam, a cooling module configured to supply a coolant to the welded seam both inside and outside of the strip as the weld seam is being formed, and another cooling module configured to immerse the welded strip in a coolant after the weld seam is formed for a sufficient length of time to prevent the formation of untempered martensite.

The invention relates to a welding device, in particular to a circular and longitudinal seam welder special for automatically welding multi-specification tank bodies. The speed-variable circular and longitudinal seam welder applied to the multi-specification tank bodies mainly comprises four parts, namely a bed body (1), a headstock (2), a beam mechanism (12) and a tailstock (5). Compared with the prior art, the circular and longitudinal seam welder has the advantages of adapting to the change of the tank body diameter range of phi300 to 1,400mm and welding linear speed range of 200 to 1,200mm/min, realizing edge sealing and dual circular and longitudinal seam welding of the tank bodies, along with multiple functions, compact structure, convenient operation, high stability and low production cost.

The invention discloses a longitudinal seam welding special machine with a linear structure light type vision sensor and a control method thereof. The longitudinal suture welding special machine comprises a welding gun, the linear structure light type vision sensor, an industrial control computer and an execution mechanism, wherein the welding gun is fixed on the execution mechanism; the welding gun and the linear structure light type vision sensor are connected to an operation rail of the longitudinal seam welding special machine, and the linear structure light type vision sensor is arranged in front of the welding gun; and the output end of the linear structure light type vision sensor is connected with the execution structure through the industrial control computer. With the control method, the concept of a coordinate system is established, and a welding seam track is detected through the vision sensor to essentially change an application way of corresponding the welding gun to an image reference point through a rigid body relation, and the method can also be used for tracking the space curve welding seam without limitation of tracking the linear welding track. The longitudinal seam welding special machine detects the whole welding seam track, even if the sensor is out of the visual field, the last section of the welding seam can also ensure the tracking of the whole welding seam.

The invention relates to a program-controlled side-moving oil cylinder circumferential seam welding machine, which consists of seven parts: an automatic control system, a power clamping mechanism, a lateral shifting device, a vertical lifting device, a welding torch swinging device, a position fine-tuning device and a welding mechanism. The invention adopts a PLC programmable controller as a main control unit, and adopts a Chinese display and video touch screen as a parameter adjustment dialogue interface. The touch screen can set the welding voltage, current welding speed and swing speed of each layer, and it is equipped with automatic and manual buttons for welding torch up and down. The invention adopts the mode of rotating the workpiece and fixing the welding torch; the welding torch is equipped with a fine-tuning mechanism and a two-axis angle adjustment device, which can adjust different welding angles; the welding torch is controlled by air pressure, and the micro DC motor drives the welding torch to swing; the tailstock is tightened by air pressure, and the machine head The three-jaw clamping method is adopted to realize automatic, manual and semi-automatic operation. The invention has the advantages of high degree of automation, good welding quality, safety and reliability.

The invention provides a dissimilar metal spot welding system of light metal and coated steel and a welding method thereof, wherein the system comprises a CMT (cold metal transfer) arc welding system, an air bottle, a robot control module, a robot and a clamping device; the arc welding system is connected to the robot control module and used for transmitting a welding control signal; the air bottle is communicated with the CMT arc welding system; the robot control module is connected to the robot for transmitting a control signal of the movement of the robot. In the invention, a spot melting soldering joint is formed between light metal and coated steel to realize the spot connection of the light metal and the coated steel; the serious deformation of the joint during continuous seam welding is solved while the connecting quality of dissimilar metal is ensured; traditional vehicle body part joints primarily using resistance spot welding process are not influenced; and the design and manufacture costs of vehicle bodies are greatly reduced.

The automatic tracking device for a big diameter longitudinal seam welding comprises a visual sensor integrated with the welding gun in front of it, interface circuit, computer controller and welding seam tracking execution mechanism, with the said welding gun and visual sensor installed on the running cart along the seam direction, welding tube resting on the rolling wheel on the rack, with the weld seam track execution device made of servo motor and decelerator formed roller drive device and the frequency change motor and turbine screw lifting device formed rolling rack lifting mechanism. It is compact in structure, reliable in working.

A method utilizing welds, reinforced with sewn seams, to adhere two fabrics together to form an inflatable airbag cushion. Although welded seams provide better and more easily produced attachment points between multiple layers of fabrics, not to mention improved manners of reducing air or gas permeability as such attachment points, the utilization of sewn seams adjacent to such welded areas provides stronger reinforcement, and thus more reliable non-permeable fabrics. Seam welding generally concerns the utilization of a film on the underside of a fabric which, upon contact with a second, film-treated fabric and upon exposure to high frequency energy, forms a bead of polymeric material at the attachment point between the two fabric layers. Lower numbers of sewn seams may be utilized to permit sufficient reinforcement if the size of the formed polymeric bead if of sufficient size to permit thorough sealing and adhesion between the fabric layers. Such a specific reinforced fabric, as well as high bead-size welded airbag fabrics are encompassed within this invention.

An improved vehicle box assembly with an upright front or side panel defined by a monolithic one-piece roll-formed steel sheet member having a desired three-dimensional configuration. The sheet steel member is roll-formed in the lengthwise direction thereof. The panel has a channel, preferably a closed tubular channel on the front panel, roll-formed along one edge of the sheet steel during forming of the panel. The closed tubular edge rail is preferably closed by a seam weld which extends lengthwise therealong and is performed in line with the roll-forming operation. The roll-formed panel is preferably provided with a flat shelf deformed horizontally to extend lengthwise along the panel downwardly from the top rail.

An improved vehicle box assembly with an upright front or side panel defined by a monolithic one-piece roll-formed steel sheet member having a desired three-dimensional configuration. The sheet steel member is roll-formed in the lengthwise direction thereof. The panel has a channel, preferably a closed tubular channel on the front panel, roll-formed along one edge of the sheet steel during forming of the panel. The closed tubular edge rail is preferably closed by a seam weld which extends lengthwise therealong and is performed in line with the roll-forming operation. The roll-formed panel is preferably provided with a flat shelf deformed horizontally to extend lengthwise along the panel downwardly from the top rail.

Continuous coil tubing made from shorter lengths of flat metal strip which are spliced end-to-end and formed into tubular form and seam welded and thereafter introduced into a forging or hot reduction process. Finished coil tubing is withdrawn from the process at a different rate than flat metal strip is fed into the process. Welds made to the flat metal strip blend into and substantially disappear from the finished coil tubing.

Disclosed is a method for producing aluminum drive shafts from molten aluminum alloy using a continuous caster to cast the alloy into a slab. The method comprises providing a molten aluminum alloy consisting essentially of 0.2 to 0.8 wt. % Si, 0.05 to 0.4 wt. % Cu, 0.45 to 1.2 wt. % Mg, 0.04 to 0.35 wt. % Cr, 0.7 wt. % max. Fe, 0.15 wt. % max. Mn, 0.25 wt. % max. Zn, 0.15 wt. % max. Ti, the remainder aluminum, incidental elements and impurities and providing a continuous caster such as a belt caster for continuously casting the molten aluminum alloy. The molten aluminum alloy is cast into a slab which is rolled into a sheet product. After solution heat treatment, the sheet product is formed into a tube having a seam which is welded to provide a seam welded tube. The seam welded tube is placed in a forming die and hydroformed to form the drive shaft.

The invention discloses a hybrid welding method and hybrid welding equipment for laser electromagnetic pulse. The method can be used for laser seam welding and laser spot welding technology, a pulsed high magnetic field is applied to a welding region during the process of laser welding on a workpiece with the effect of laser beams so as to mutually react with an induced plasma, a welding pool and a stress strain field through welding and complete welding task. The equipment comprises a laser device, an electromagnetic pulse generator, a numerical control system, an optical transmission system and a laser electromagnetic pulse combined machining head. The combined machining head is used for integrating the laser beams with the pulsed high magnetic field and adjusting the distance between an electromagnetic conversion device and the workpiece; the combined machining head is arranged on a machine tool. The structural deformation can be reduced, the welding quality and machining efficiency are improved, and insurmountable technical problems when a metallic material structure is manufactured through existing single welding technology are solved.

The invention provides a semi-automatic liner welding production line. The semi-automatic liner welding production line comprises a sheet metal edge-coiling mechanism, a straight seam welding plant, an end cover girth welding device, a water inlet/outlet pipe welding device, and a technologic rack welding device, wherein the devices are connected by conveyor chains; the sheet metal edge-coiling mechanism is an edge coiling machine; the straight seam welding plant is a working station for finishing straight seam welding of the edge rolling liner, and comprises three ion tunnel straight seam welders; the girth welding device comprises three-station assembly machine and three horizontal type girth robot workstations; the water inlet/outlet pipe welding device is a magnesium rod water pipe welder; the technologic rack welding device is a robot rack welder. The semi-automatic liner welding production line disclosed by the invention, compared to the prior art, is reasonable in layout, can reduce the occupied area of the production equipment by 60%, the labor by 260%, and improve the production efficiency by nearly 3 times.

The invention discloses a tank fabricating and welding method, which is characterized by comprising the following steps of: a. fabricating and welding a tank soleplate, wherein the step comprises: (1) paving the soleplate, and (2) welding the soleplate; and b. fabricating and welding a tank wall board, wherein the step comprises: (1) paving the wall board, and (2) welding the wall board, and the step of welding the wall board comprises: 1) temporarily not welding 300mm of the lower edge of a longitudinal weld and welding the lower edge together with a circular seam after being paired with a next sine wall board; 2) when welding the circular seam, enabling welders to be uniformly distributed on the surrounding of the tank and welded in the same direction; 3) selecting the setting distance of an anti-deformation fixture according to the thickness of the wall board before welding the circular seam, the distance of the fixture of the wall board with delta equal to 6mm being 300mm; and 4) selecting an even number of welders when welding the wall board, the levels of the welders being close, and welding with the same vertical seam and circular seam welding parameters. The tank fabricating and welding method disclosed by the invention has the advantages of simple and convenient operation, strong maneuverability and the capability of effectively controlling the welding deformation of the tank.

The invention relates to a flat position single-seam symmetrical welding method for an orthotropic plate U-shaped rib corner welding seam robot. The method comprises the following steps that A, U-shaped rib groove processing, compression and bridge deck plate blanking are carried out for obtaining a U-shaped rib plate unit through assembly; B, the U-shaped rib plate unit is horizontally placed on a reverse deformation turning moulding bed, and the position of the U-shaped rib plate unit is regulated so that the center line of the U-shaped rib plate unit is coincident with the center line of the turning moulding bed; C, the U-shaped rib plate unit is clamped and fixed, in addition, reverse deformation is carried out, the turning angle of the reverse deformation turning moulding bed is regulated so that a U-shaped rib to be welded is positioned in the horizontal position, and in addition, an angle scale is used for detection; D, the welding program and the welding specification parameters are input into a robot automatic welding system so that two welding hands arranged on a robot cantilever respectively and simultaneously carry out flat position single-seam welding on the angle welding seams of the two sides of the U-shaped rib. The method provided by the invention has the advantages that the U-shaped rib is assembled on the platform, the assembling precision is high, and a gap between the U-shaped rib and a bridge deck plate can be enabled to be within 0.5mm. The robot automatic welding hand has the electric arc tracking function, the change of the welding current and the electric arc voltage is sensed through swinging in the welding process, and the small deviation of a weld pass is corrected.

The invention discloses a method for welding circular seams of a vessel by plasma welding. A laser head (18) for aiming at a weld bead is arranged on a plasma welder head, an upper large protective cover (19) is arranged on the front side of a welding seam, and a lower large protective cover (4) is arranged on the back side of the welding seam, wherein the upper large protective cover is arranged on a plasma welding torch at the front side of the weld bead, and the lower large protective cover is arranged on a tool capable of automatically aiming at the welding position in vessel cylinder; and the welding seam adopts a novel Y-shaped groove beveled edge to finish the welding for the circular welding seam of the vessel cylinder automatically and continuously. The method is applied to the welding the circular welding seam of the vessel cylinder made of zirconium, nickel, titanium, stainless steel and alloys, and composite plate materials, and has the remarkable advantages of good welding quality, high welding efficiency, and protective gas conservation, and the reduction of the labor intensity of operators.

A joining portion of a polymeric component, such as a vehicle door panel, may be welded (for example, a spot weld) to a metal component, such as a mating vehicle panel, using a molded-in-place metallic welding insert. The welding insert is shaped to provide welding surfaces at both surfaces of the joining portion of the plastic component and to conduct a welding current between the surfaces. When the workpieces are assembled for welding, opposing spot welding electrodes bear against the outer surfaces of the metal part and the metal insert in the plastic part. A spot welding operation produces a weld nugget between the facing surface of the metal part and the metal insert anchored in the plastic part. Continuous seam welds or a series of stitch seam welds may be made using suitably shaped welding inserts.

The invention discloses automatic circular seam welding pipe tongs and relates to processing equipment for automatically welding circular seams of elbows/flanges, belonging to the technical field of welding processing equipment. The welding pipe tongs are characterized in that the main body of a driving and rotating mechanism is a bracket with a U-shaped groove, and one side of the bracket is connected and fixed with a U-shaped base box body, while the other side is provided with a rotary gear ring, a supporting seat, a roller bearing, a transition gear, a drive device and a jacking drive, wherein a driving shaft of the drive device is connected with the transition gear, the transition gear is externally engaged with the rotary gear ring, and the rotary gear ring is supported by the supporting seat and the roller bearing which are distributed along the circumference of the rotary gear ring; and a self-centered positioning and clamping mechanism is arranged in the rotary gear ring. Thewelding tool can clamp and rotate an elbow/flange to be welded and realize manual welding and ensures that circular welding seams of elbows/flange inner corners/outer corners can be automatically welded, thereby the labor intensity of workers is reduced, the clamping number of times is reduced, and the welding quality and efficiency are improved.

The invention discloses a spraying type steel barrier, which comprises columns, upper cross bars, lower cross bars and vertical bars. The main bodies of the columns, the upper cross bars, the lower cross bars and the vertical bars are all integrated style steel works. The columns are made from the galvanized steel strip, made into steel pipe of a certain shape and sprayed with plastic or paint; the upper cross bars, the lower cross bars and the vertical bars are integrated parts which the upper cross bars, the lower cross bars and the vertical bars are respectively made from the galvanized steel strip, steel pipes of a certain shape are made through extrusion forming of the steel pipe stock mould, seam welding of the high frequency induction welder and extrusion forming of the steel pipe shaping mould and the integrated parts are formed by placing the vertical bars between the upper cross bars and the lower cross bars, welding and fixing, and at last spraying plastic or paint on the exterior surface of the integrated parts. The spraying type steel barrier has the advantages of high structural strength, deformation resistance, beautiful and clean barrier surface, rustiness resistance, easy cleaning, greatly reduced maintenance cost, both the beautiful appearance of the PVC plastic steel barrier and the high strength of the assembly type barrier.

A seam welding machine includes a first roller electrode and a second roller electrode that hold a layered body formed by layering a plurality of workpieces. The first roller electrode is in contact with a thinnest workpiece, which is disposed on an outermost side of the layered body. The seam welding machine has a current-branching electrode held in contact with the thinnest workpiece, and which is charged with a polarity opposite to that of the first roller electrode. Accordingly, when an electric current is applied between the first roller electrode and the second roller electrode that hold the layered body, a branch electric current is applied from the first roller electrode to the current-branching electrode, or a branch electric current is applied from the current-branching electrode to the first roller electrode.

The invention relates to a hydraulic lifting reverse method of a chimney steel inner cylinder, which is mainly characterized in that the body of the chimney steel inner cylinder is divided into a plurality of cylinder sections being convenient for lifting along the height direction of the chimney steel inner cylinder, and each cylinder section is divided into a plurality of cylinder sheets according to the requirements convenient for roll bending manufacture; on the basis, the first section steel inner cylinder of the head cylinder of the chimney steel inner cylinder is assembled, and then a spiral expansion ring and a hydraulic lifting device are arranged in the section steel inner cylinder; after the first section steel inner cylinder is lifted by the height of the first section steel inner cylinder by utilizing the hydraulic lifting device, the subsequent cylinder sections are assembled and are in horizontal seam welding with the first section steel inner cylinder body of the head cylinder, thereby completing the installation of the first section steel inner cylinder of the head cylinder, and subsequently, the installation process of the first section steel inner cylinder of the head cylinder is repeated, enabling the subsequent steel inner cylinder sections to be installed section by section from top to bottom until the installation construction of all steel inner cylinders is completed. The construction method does not need high-altitude operation, has convenient operation and high construction speed and can effectively ensure the construction quality and construction safety. Meanwhile, the construction method can also save materials, lower loss and reduce cost.

The invention belongs to the field of superconducting material and relates to a superconducting strand based on a ReBCO high-temperature superconducting tape. The superconducting strand comprises a superconducting strand core and a coating layer. The ReBCO high-temperature superconducting tape is cut into tapes which are arranged and stacked to be the superconducting strand core with circular, square or rectangular cross section; the coating layer is made of copper tapes, aluminum tapes, aluminum alloy tapes, stainless steel tapes or ReBCO coating superconducting tapes; the coating layer is rolled and coated on the superconducting strand core. A laser Ag welding technology is used for carrying out butt-seam welding on the coating tapes. The superconducting strand provided by the invention expands the application range of the coating superconductor, improves engineering current density, flexibility and mechanical strength of the superconducting wire, and is applicable to a superconducting cable, a current guide wire, and the like.

The invention relates to the technical field of welding machines, in particular to an automatic straight seam welding machine. The automatic straight seam welding machine comprises a locating clamping device installed at the lower part of a working table and a straight seam welding device installed at the upper part of the working table. The straight seam welding device comprises a spot welding arc striking part, a welding seam locating part and a submerged-arc welding part. The working table is provided with a transverse moving device, which can move along a welding seam, corresponding to the straight seam welding device. The spot welding arc striking part, the welding seam locating part and the submerged-arc welding part are fixed on the transverse moving device respectively. A machine frame is provided with an automatic feeding device horizontally and movably. The automatic feeding device is arranged below the locating clamping device. An accessory device for driving the spot welding arc striking part and the submerged-arc welding part is arranged beside the machine frame. The automatic straight seam welding machine is provided with an automatic control system corresponding to the locating clamping device, the straight seam welding device, the transverse moving device and the automatic feeding device. The automatic straight seam welding machine disclosed by the invention has the advantages of high automation degree, good welding quality, convenience for operation and high working efficiency.

A suspension mount includes a flange formed directly into an axle housing. The axle housing includes a pair of housing halves that are attached to each other along a seam weld. Each housing half includes at least one transversely extending flange. Prior to welding, the flanges from the upper and lower housing halves are aligned with each other to define the suspension mount. The suspension is then attached to the axle housing at the flanges with fasteners or by welding.

Corrosion resistant multi-layered clad plates or sheets with high bonding strength is disclosed. According to the present invention, clad metals with high corrosion resistance such as Ti, Nb, V, or Zr and their alloys can be bonded with a cheap substrate such as Fe, Cu, or Ni and their alloys by the resistance seam welding. Using the insert metal causing the eutectic reaction, the clad metal can be strongly bonded with the substrate. Especially, corrosion resistant clad plates with excellent bonding strength can be fabricated by controlling the thickness and the microstructures of the eutectic reaction layer at the interface between the clad metal and the substrate or between the clad metal and the insert metal.

Disclosed are an ultrasonic testing system and an ultrasonic testing technique for a pipe member capable of detecting minute flaws of several hundreds of microns or less located at positions in the wall thickness inside portion of a welded portion of a seam-welded pipe and the like without omission and further easily setting optimum conditions when the size of the pipe is changed. A transmitting beam, which is focused to the welded portion at an oblique angle, is transmitted using a part of the group of transducer elements of a linear array probe as a group of transducer elements for transmission, a receiving beam, which is focused at the focusing position of the transmitting beam at an oblique angle, is formed using the transducer elements of a portion different from the above group of transducer elements for transmission as a group of transducer elements for reception, and a flaw echo is received from the welded portion.

The invention discloses a curve welding seam welding technology based on line structured light and oriented to an oblique crossed tube. According to the method, machine version and robot kinematics are combined very well, so that the problems that the process of obtaining curve welding seam feature points is not flexible, and a curve track model are difficult to establish are solved. The curve welding seam welding technology comprises the following steps of: firstly, controlling a six-degree-of-freedom robot, enabling a robot end to drive an industrial camera to shoot a curve welding seam image with the line structured light; and then, carrying out a series of image pre-treatment and feature point extraction work to obtain space coordinates of all feature points of a curve welding seam, and fitting through a B sample curve, and finally obtaining a smooth space curve. Besides, the gesture of a welding gun can be changed in real time according to included angles at the two sides of a workpiece when the welding gun is used for welding a curve, so that the welding process and welding requirements are improved better.

The invention discloses a welding structure for an inner container longitudinal seam of a stainless steel gas cylinder and a welding method. The welding structure comprises a strip-shaped auxiliary board, wherein a main gas guide hole and a gas guide groove are formed in the strip-shaped auxiliary boar in the length direction; the main gas guide hole and the gas guide groove are arranged in parallel; a plurality of gas guide small holes are formed between the main gas guide hole and the gas guide groove; the two ends of the gas guide small holes are respectively communicated with the main gas guide hole and the gas guide groove; and the cross section of the gas guide groove and the cross section of the longitudinal seam to be welded are positioned in the same plane. The welding method comprises the following steps: rolling round; carrying out butt welding and spot welding; carrying out spot welding on run-on plates and run-off plates; clamping; and welding. According to the invention, an MIG automatic welding process is adopted, so that the primary input-cost of welding equipment is low; in a later using process, the input using and maintenance costs are relatively low and the working efficiency is improved greatly. By adopting the process in the invention, the qualification rate of nondestructive testing reaches 99.4% or above in an actual longitudinal seam welding process of an insulated gas cylinder and a cylinder for an LNG vehicle; and physical and chemical test projects completely meet standard requirements.

Belonging to the field of welding equipment, the invention relates to a vertical circular seam welding machine applied to thin-wall stainless steel tee bellmouth non-oxidation welding. The welding machine comprises an operating platform, a driving device, a welding gun and a slewing mechanism for causing the product to be processed to rotate with the slewing mechanism in a matched manner; the slewing mechanism comprises a principal axis and the driving device; a principal axis mounting hole is arranged on the operating platform, and the principal axis is matched with the principal axis mounting hole; and the lower end of the principal axis is connected with the driving device, the upper end thereof is provided with a stationary axis for fixing the product to be processed, a through hole for conveying shielding gas is arranged in the principal axis, air holes are arranged on the stationary axis, the air holes are communicated with the through hole in the principal axis, and the welding gun is fixed on the operating platform by a welding gun seat. With the welding machine of the invention, the product clamping process can be simplified, and the welding efficiency and welding quality can be improved, as a result, the purpose that pipe fittings are oxidized neither internally nor externally after being welded is achieved; and meanwhile, the labor intensity is greatly reduced and the welding time is shortened.

The invention discloses a construction method for using a layering method to construct a double-curved-surface stainless steel curtain wall. The method includes: building a double-curved-surface stainless steel curtain wall three-dimensional model and deepen drawing; decomposing the double-curved-surface curtain wall structure according to the model and deepen drawing into a surface layer and a keel layer; deepening construction drawings of the surface layer and the keel layer; machining and constructing the surface layer of the double-curved-surface stainless steel curtain wall; cutting and transporting the surface layer; constructing the keel layer of the double-curved-surface stainless steel curtain wall; mounting and seam welding the surface layer; processing the facing of the double-curved-surface stainless steel curtain wall. The construction method has the advantages that the layering method is used to construct the double-curved-surface stainless steel curtain wall, the surface layer with large welding and splicing work load is constructed in a factory, the keel layer is welded on site, filed structural features are combined to adjust and eliminate construction errors reasonably, coordinating and unifying of the curtain wall structure and a main body structure are guaranteed, and accurate curved surfaces and radian smoothness of the curtain wall are guaranteed.