1370results about How to "Fast welding speed" patented technology

An automatic groove-tracing welding system is capable of carrying out a welding operation, particularly, a welding operation involving weaving, without requiring monitoring even if conditions of a groove is different from design conditions of the groove. An image processor 3 receives an image signal representing an image of a weld zone 52 including the tip of a welding wire from a camera head 2 provided with a CCD camera, processes the image of the weld zone 52 to determine the position of a groove, calculates the positional relation of the groove with a welding torch 1, and sends a position correction for correcting the position of the welding torch 1 so that the welding path of the tip of the welding torch 1 may coincide with a predetermined middle part in the groove to a robot controller 43 for controlling a welding robot. When the automatic groove-tracing welding system performs a welding operation involving weaving, the image processor 3 receives a weaving phase signal representing phases of weaving from the robot controller 43, calculates the positional relation between the groove and the welding torch on the basis of the phase of weaving, and sends a weaving width correction signal to the robot controller 43.

A respirator 10 that has a harness 14 and a mask body 12 that is joined to the harness 14. The mask body 12 includes a filtering structure 16 that may contain a plurality of layers of nonwoven fibrous material 58, 60, 62. The layers of nonwoven fibrous material 58, 60, 62 have a thickness A and are welded together by at least two parallel weld lines 34′, 34″ that are spaced at 0.5 to 6 times A. A mask body that uses parallel weld lines may exhibit better resistance to collapse and may be manufactured at faster speeds than similar structures which use single weld lines of comparable width.

The invention relates to a gas shielded welding method and device of a narrow gap or a super-narrow gap impulse jet current consumable electrode controlled by electromagnetic of the heavy section part with middle and high strength. The invention uses a magnetic coil (3) to provide excitation current processed by an excitation source, which can generate an extra magnetic field. Under the conditions of narrow gap or super-narrow gap, high feed rate, fused drop spray transfer and impulse welding current, the process of the gas shielded welding of the rotating jet current consumable electrode with high-melting frequency pulse that is controlled by the electromagnetic for the heavy section part with middle and high strength can be realized. The device of the invention comprises the excitation source, excitation equipment, auxiliary equipment and a water cooling system. The excitation equipment is the magnetic coil (3) with or without a conducting core (5). The excitation equipment is fixed on a welding burner (6), which is positioned above a work piece (9). The excitation current provided by the excitation source (10) produces stationary or time-varying electromagnetic mixing magnetic field that has the combination control over the processes of arc welding, wire burn-off, drop transfer, melting bath flow and welding line coagulation, which finally forms the welding line of good quality.

The invention discloses an integrated steel pipe and flange splicing and machining machine and a machining process thereof and aims to provide an integrated steel pipe and flange splicing and machining machine which can improve the manufacturing precision and the production efficiency and reduce the labor intensity and is high in steel pipe and flange welding quality and a machining process of the machine. The integrated steel pipe and flange splicing and machining machine comprises a working platform, and a supporting bracket which is arranged on the working platform and is used for supporting a steel pipe, wherein one end of the working platform is provided with a first welding device; a first guide rail which extends to the other end of the working platform is arranged on the top of the working platform; a first mounting plate is arranged on the first guide rail in a sliding mode; a second welding device is arranged on the first mounting plate; and flange fixing templates are arranged on the first welding device and the second welding device. The machining process comprises the following steps of: lifting the steel pipe to the supporting bracket, and fixing the flange to a flange fixing template; and welding annular gaps of the inner and outer side faces of the steel pipe and the flange through the first welding device and the second welding device.

The present invention is a friction stir welding machine adapted to perform solid phase welding on a welding portion of materials to be welded, by pressing a welding tool against the welding portion of the materials to be welded while rotating the welding tool, and forcing the welding tool to be advanced into a softened portion which is softened by a frictional heat while stirring the softened portion, wherein a coating made of aluminum nitride is formed on at least a region of the welding tool to be in contact with the materials to be welded.

The invention provides an automatic millstone welder, which belongs to the technical field of machinery. The welder solves the problems that welding quality is poor and welding efficiency is low in existing welding process of diamond millstones. The automatic millstone welder comprises a frame and a working platform. A millstone can be fixed on the working platform. A high-frequency induction coil device is disposed on the periphery of the working platform and the high-frequency induction coil device can perform high-temperature heating and welding to the millstone and bit tools. The working platform is driven to rotate by a motor. A correction device which enables the bit tools to be positioned to the millstone accurately is disposed on the periphery of the working platform. A pressing device which can press the bit tools and fix the bit tools on steps of the millstone is disposed right above the working platform. The automatic millstone welder is fine in welding effect, high in welding efficiency, and the welded millstone has high quality.

The invention discloses a laser and MIG (metal-inert gas) arc composited welding method for high-nitrogen steel. The laser and MIG arc composited welding method is characterized by comprising the following steps of: design of a welding joint; design of a welding mode; setting of a composite way and heat source spaces; selection of protective gas for the composite welding; setting of welding technology parameters according to the composite way; and synchronous implementation of the composite welding. Compared with the prior art, the laser and MIG arc composited welding method has the advantages of being capable of implementing the welding of the high-nitrogen steel with middle thickness and achieving weld joints which have clean and smooth surfaces and are good in forming and free from sunken parts; and meanwhile, the welding method has the characteristics of low loss and uniform distribution of nitrogen elements at connectors, high welding penetration, high welding speed, small deformation of workpieces, low assembly requirements and the like.

Disclosed is a method for fixing a printed circuit board (PCB) with a mark point location function. The method is characterized by including the following steps: (1) firstly obtaining two mark point images on a reference PCB with a camera when programs are made, (2) obtaining two mark point images which are matched with two chosen mark point positions in the programming process and are on the detected PCB with the camera in the process of welding, and (3) comparing two groups of mark points which are captured in the step (1) and the step (2). If the two groups of the mark points are not out of position, the board position is normal, and if skewing exists, the PCB can be compensated. By the means of the method for fixing the PCB with the mark point location function, welding precision can not be influenced by the factors such as the size, the height and the skewing of the PCB, and simultaneously, welding time is deceased and welding speed is increased.

The invention relates to a novel laser spot welding method, in particular relates to a laser pulse spot welding method for a metal sheet, aiming at solving the problems that in the prior art, the burning loss of the material is high, air holes, cracks and collapse are easy to generate in the laser spot welding process, and particularly the reflectivity of the aluminum alloy material to laser is high so that the stability in the spot welding process is poor. The laser pulse spot welding method for a metal sheet comprises the following specific steps: (1) preprocessing a workpiece to be welded, (2) fixing the workpiece to be welded, and (3) welding by adopting the laser pulse spot welding method. The laser pulse spot welding method for a metal sheet has the advantages of enhancing the welding efficiency, improving the welding spot quality, ensuring good uniformity of the sizes of the welding spots and realizing the spot welding of a plate of moderate thickness by a small-power laser. The laser pulse spot welding method for a metal sheet is mainly used for welding metal materials and particularly used for welding the metal sheet.

The invention discloses an FSW (Friction-stir Welding) method assisted by a heat source. The method comprises the following steps of: A, splicing and fixing to-be-welded materials, preheating to-be-welded regions by an auxiliary heat source until the welded materials are in a plasticized or alloyed state; and B, enabling the auxiliary heat source and a friction-stir head to be positioned on same pair of butt welding wires, and after the welded materials are heated to be in the plasticized state, enabling the friction-stir head to advance along the heating path of the auxiliary heat source so as to perform friction welding. The invention provides a composite welding method which is reasonable in cost, long in service life of stir head, capable of realizing high high-melting-point metal and dissimilar metal welding speed, and high in welding quality. According to the welding method, the service life problem of the stir head of high-melting-point metal FSW and the problem of dissimilar metal FSW welded seam alloying are successfully solved, the welding cost of the high-melting-point metal and the welding cost of the dissimilar metal are greatly lowered and the welding quality is improved.

The invention relates to a welding technique, especially a combined welding process combining small bevel angle full-automatic CO2 gas shielded protection welding with unionmelt welding, comprising following steps: (1) opening a corresponding small angle bevel on the weldment with a bevel angle of 25+50DEG; (2) paring, ensuring welding space of 8+20mm; (3) grounding welding by using full-automatic CO2 gas shielded protection welding; (4) performing filling in and capping welding by using unionmelt welding. The advantages of the invention are: (1) small bevel angle welding, saving material and improving productivity; (2) grounding welding by using unionmelt welding, the electrical arc heat quantity is centralized, the heated area is small, the welding speed is quick, head affection range is contracted, and welding deformation is small; (3) crackle generation tendency is decreased; (4) bottom slag cleaning is avoided to prepare for narrow gap welding and welding efficiency is increased; (5) filling in and capping are performed by using unionmelt welding, so that welding speed and external appearance forming quality are assured.

The invention relates to a welding technique in equipment manufacture industry, which is a welding speciality technique of a welding casing of an MCL-typed horizontal cutting centrifugal compressor, in particular to a welding process of the welding casing of the centrifugal compressor with low-temperature steel 09MnNiDR material at -70 DEG C. The gas protection welding is adopted; the welding wire grade is HS09MnNiDR and the diameter of the welding wire is Phi1.2mm; the polarity of the power supply is reversed DC power. The invention comprises a processing before welding, a welding process and a processing after welding; wherein, the process parameters in the welding process are that the welding current ranges from 150A to 200A, the welding voltage ranges from 24V to 28V, the protection gas is the mixed gas with 80% of Ar and 20% of CO2 according to the volume percentage, the welding speed ranges from 250mm/min to 280mm/min, the dry elongation ranges from 10mm to 15mm, and the gas flux ranges from 20L/min to 25L/min. The welding wire of the gas protection welding of the invention is not required to be dried, the welding wire is automatically fed in the welding process, and a welding rod is not required to be replaced; as the heat of the MAG melting polar gas protection welding is concentrated, the invention has the advantages of narrow thermal effect area, little deformation, beautiful forming, good quality, low cost, fast welding speed, high welding efficiency, etc.

A polarity switching control method is provided for consumable electrode AC pulse arc welding. By the method, a peak current and a base current are applied during an electrode-positive polarity period, while an electrode-negative current is applied during an electrode-negative polarity period. For performing the welding, polarity switching is performed to alternate the electrode-positive polarity period and the electrode-negative polarity period. When a consumable electrode and a base metal are in short circuit with each other, the polarity switching is performed after the short circuit is broken and an arc is generated.

The invention relates to an explosive welding forming method of magnesium and aluminum alloy composite plates. The explosive welding is performed according to the performance requirements of the magnesium and aluminum alloy composite plates, ammonium nitrate fuel oil mixture is adopted, and long-distance instantaneous explosive form is performed on a ground sand base. The welding method is high in forming speed, welding line is firm and is good in metallographic structure compactness, the combined rate is up to 99.5%, the interfacial shear strength is 120MPa, on the premise of strict operation, the welding process is safe and reliable, and the method is reliable and effective in magnesium and aluminum alloy composite plate production.

This invention relates to a hybrid welding device (1) comprising laser welding means. (2) and electric arc welding means (4) with meltable electrode (6). The device (1) according to the invention is made such that the meltable electrode (6) has an approximately rectangular cross-section. This invention also relates to a hybrid welding method that can be used by such a device. Application to the automobile field.

The invention discloses a welding method of a laser-ultra-small current GMA composite heat source; the welding method can solve the technical problem of large deformation when a metal thin plate is welded; the invention mainly comprises the following steps; in composite heat source welding, the adopted average current of a GMA arc (5) is 15A to 30A; when the steel material is welded, the power of the laser (1) is more than 800W, and when the aluminium alloy is welded, the power of the laser (1) is more than 1,600W; a laser beam (1) is at the front and the GMA arc is at the back; and the distance of chevilled silk is 0mm to 3mm and the two molten pools are connected together. The welding method is applicable to the welding of thin metal plates with the thickness to be 0.5mm to 4mm such as aluminium alloy, carbon steel, low alloy and more than two dissimilar metals.

The invention provides a field welding method of a domestic A335 P91 high-pressure thick-wall pipe, and belongs to the technical field of welding. A welded part of a welded pipe is processed as a double-V-shaped groove; a process of welding 3 layers for bottoming by using manual argon arc welding GTAW and filling a cover surface by using automatic submerged arc welding SAW is adopted; multi-layer and multi-pass welding is adopted; each layer of welding line sections is decreased; and the welding line crystallization conditions are changed, so that the toughness of a welding joint is improved, an overthick welding bead is prevented from narrowing a heat affected zone, and a softening belt of the welding joint is prevented from generating cracks in long-time operation at high temperature; a small-diameter welding wire with a diameter of not more than 2.5 mm and a low-hydrogen welding agent are adopted to weld to reduce the linear energy in the welding process, so that grains of base metal are refined, and the possibility of generating such defects as air holes and cracks in welding lines is reduced; and compared with a traditional manual welding method, the field welding method effectively shortens the heat treatment and welding period, improves the welding line quality and the welding efficiency, relieves the labor intensity of welders, and saves the construction cost.

The invention relates to an electronic cigarette, a manufacture method of the electronic cigarette, and an injection method of the electronic cigarette. The electronic cigarette comprises a power unit, an atomizer unit, and a nozzle and liquid bottle unit; the units are assembled in sequence; the bottom end of a liquid bottle of the nozzle and liquid bottle unit is provided with an injection through hole hermetically connected through a plug. A gas passage forms among the liquid bottle, an outer tube and a nozzle. A nozzle liquid storage unit is assembled by: unplugging the plug, injecting tobacco juice into the liquid bottle, pressing the plug into the injection through of the liquid bottle with the injected tobacco juice, and mounting the liquid bottle with the mounted plug into the nozzle and liquid bottle unit. The injection method includes: making the protruding liquid injection through hole in the bottom end of the liquid bottle and manufacturing the plug used for plugging the injection through hole; sealing the gas passage of the electronic cigarette; inserting an injection head into the injection through hole of the liquid bottle for injection; unplugging the injection head and hermetically connecting the plug into the injection through hole in the bottom end of the liquid bottle. The method of assembling the liquid bottle prior to injection is provided to adapt to automatic high-efficiency production of electronic cigarettes and the injection method of electronic cigarettes.

The invention relates to a laser-arc composite welding method for a T-shaped joint of a thin plate, belonging to the technical field of laser materials processing. The method adopts a laser-arc composite thermal source to complete the welding of the T-shaped joint on the lateral face of a bottom plate, a laser bean enters from the top face of the bottom plate, an electric arc is in paraxial arrangement at the front part or the rear of the laser bean, and the composite thermal source accomplishes the penetration fusion welding from the lateral face of the bottom plate of the T-shaped joint. The welding seam of the joint welded by the method is favorably shaped, a weld toe of the connection part of a rib plate and the bottom plate is uniformly and smoothly transited, and air holes, cracks and other defects are not presented after the welding seam is anatomized. The method fully utilizes the characteristics of the composite thermal source; and under the mutual actions of laser and arc, the stability of a welding process is obviously improved, the welding efficiency is increased, and the welding deformation can be lessened.

The invention provides a corrosion-resistant composite bimetal longitudinal submerged-arc welded steel pipe and a method for manufacturing the same. The method includes steps of (1), manufacturing bimetal composite steel plates by a hot rolling process; (2), carrying out edge milling, pre-bending, JCO forming and pre-welding on the bimetal composite steel plates manufactured in the step (1); (3), welding weld joints of a steel pipe by a submerged-arc welding process, particularly, welding a carbon steel layer of a base layer at first when the weld joints are welded, and then welding metal of a clad layer of a corrosion-resistant layer. The steel pipe is obtained after JCO forming and pre-welding are carried out on the bimetal composite steel plates. The corrosion-resistant composite bimetal longitudinal submerged-arc welded steel pipe and the method have the advantages that the corrosion-resistant metallurgical composite bimetal longitudinal submerged-arc welded steel pipe is manufactured by a hot rolling metallurgical composite bimetal steel plate and JCOE pipe manufacturing process and the efficient automatic submerged-arc welding process, double layers of metal of the steel pipe can be metallurgically combined with each other, and accordingly the steel pipe is high in strength, integrity and corrosion resistance; the JCOE pipe manufacturing process is adopted, so that the steel pipe is high in mechanical degree, production efficiency and overall dimensional accuracy, and steel pipes with the lengths of 12 meters can be produced by the method.

The invention discloses a laser root welding robot inside a pipeline and belongs to the technical field of pipeline welding. The laser root welding robot inside the pipeline comprises a weld joint welding device. A first transmission device is connected with the weld joint welding device. A front end machine base is connected with the first transmission device. A first gear motor is arranged in the front end machine base. One end of a connecting device is movably connected with the front end machine base. A crawler type traveling device is movably connected with the other end of the connecting device. One end of a pushing device is movably connected with the crawler type traveling device. A driving device is movably connected with the other end of the pushing device. A second transmission device is connected with the driving device. One end of the second transmission device is movably connected with the front end machine base. According to the laser root welding robot inside the pipeline, the welding fusion depth is large, the welding speed is high, accurate welding track guidance is provided for a laser welding head, and the quality of laser root welding is guaranteed.