49results about How to "The welding process is stable and reliable" patented technology

The invention discloses a welding method for welding a steel pipe spirally. The welding method comprises the steps of: uncoiling a plate coil, flattening, milling edges, forming, welding and tracking detection. The welding method is characterized in that firstly the plate coil is uncoiled and flattened into a steel belt, and edge-milled into an X-shaped groove, the steel belt is conveyed to a spiral welded steel pipe former continuously according to the spiral angle; the formed steel-belt spiral steel pipe adopts a process with combination of internal and external submerged-arc welding and double-wire serial electric-arc and submerged-arc automatic welding, and then pre-internal welding, refined internal welding and external welding are carried out; a tracking sensor is adopted to detect the lowest point of a V-shaped groove of the formed seam at a distance before internal welding of the groove welded of the steel pipe to be welded to realize automatic tracking of refined welding and internal welding. The welding method disclosed by the invention has the advantages that the process with combination of internal and external submerged-arc welding and double-wire serial electric-arc and submerged-arc automatic welding and the tracking detection system is adopted, the welding deviation phenomenon and the fluctuation of welding offset can be avoided, the workload for correction and adjustment is reduced, the welding process is stable and reliable and the quality of the welding seam is ensured.

The invention discloses a hydraulically-driven constant-pressure constant-displacement friction stir welding spindle unit which is used for solving the problem of constant-pressure constant-displacement control in the heavy-load friction stir welding process. The friction stir welding spindle unit is mounted in a fork-shaped structural part at the end of a ram of a gantry body frame, and welding of a longitudinal seam of the box bottom is completed along a welding track through the gantry body frame and a double-fork piece; the friction stir welding spindle unit is characterized in that an outer sliding box and a main shaft shell are driven by pressing two groups of symmetrical shaft shoulders into a servo oil cylinder, a cylinder body tailstock of the servo oil cylinder is fixedly connected with the outer sliding box, a plunger of the servo oil cylinder is fixedly connected with the main shaft shell through a connecting piece, and the plunger extends out or retracts back through a control oil cylinder, so that the outer sliding box and the main shaft shell move relatively, in other words, the motion is the pressing motion of a shaft shoulder, and the axis is defined as a Z1 axis;sliding blocks are fixedly connected with the outer sliding box, a linear guide rail is fixedly connected with the main shaft shell, and the four sets of symmetrically-arranged sliding blocks and thelinear guide rail form a guide mechanism for shaft shoulder press-in movement; the servo oil cylinder of the Z1 axis is connected with a high-frequency proportional valve.

The invention discloses a repair welding wire for flaws of cast two-phase stainless steel 6A. The two-phase stainless steel 6A refers to 25Cr-7Ni-Mo-N(6A), and the repair welding wire basically comprises: carbon: not larger than 0.03%, silicon: not larger than 0.7%, manganese: not larger than 0.7%, chrome: 25.0-26.0%, molybdenum: 3.0-3.2%, copper:0.5-0.7%, tungsten: 0.5-1.0%, nickel: larger than 8.5-9.0%, nitrogen: 0.30-0.40%, other unavoidable impurities and elements: smaller than 0.06%, and the balance of iron. The repair welding wire with phi 2mm is finally formed by carrying the steps of refining, hot forging, multiple cold pulling and annealing on the basic constituents, satisfies the requirements of the two-phase stainless steel 6A on erosion corrosion resistance and cavitation corrosion resistance, and guarantees that a flawed repair welded position of the cast two-phase stainless steel 6A has favorable erosion corrosion resistance and cavitation corrosion resistance.

The invention discloses a method of controlling the arc strike of a carbon dioxide gas shielded welding machine by adopting digital pulse. The method comprises the steps of feeding gas for a welding gun; feeding a welding wire in a slow wire feeding mode; when the output voltage is detected to be 0 volt, outputting a 250-500 ampere short-circuit current pulse signal to the welding wire for arc strike; when the output voltage is detected to be smaller than 8 volts, switching from the slow wire feeding mode of the welding wire into a quick wire feeding mode, outputting a 250-500 ampere short-circuit current pulse signal to the welding wire to build a molten pool, and controlling an arc to be subjected to transition from arc strike to a stable arc. According to the method, the transient impact stress which is borne by a hardware power device is reduced, and the service life is prolonged; the arc strike time is shortened, the arc strike process is stable, the reliability is strong, and the arc strike success rate is high; the molten pool is built in the arc strike process, and thus a basic is established for normal, stable and reliable welding in the future. The invention further discloses a carbon dioxide gas shielded welding machine.

The invention provides a preparation method for an aluminum brazing organic flux. An alumina film can be damaged at the temperature of 180 DEG C-275 DEG C, deformation is small after the alumina film is welded, stabilizing and shaping is achieved, corrosion is avoided, corrosion to aluminum and aluminum alloy is very small, the welding temperature is far from the melting point of an aluminum material, the welding process is reliable, and the brazing qualified rate is greater than 98%. According to the technical scheme, 70 wt%-90 wt% of triethanolamine, 1 wt%-5 wt% of zinc tetrafluoroborate hydrate, 5 wt%-10 wt% of cadmium fluoroborate, and 5 wt%-10 wt% of ammonium fluoroborate are added; the zinc tetrafluoroborate hydrate, the cadmium fluoroborate and the ammonium fluoroborate are weighed at the room temperature and put into a mortar to be ground into fine powder, and grinding and mixing are uniform; the uniformly ground and mixed drug is poured into the weighed triethanolamine, and after being stirred uniformly, the drug is placed for a certain period of time. The welding problems of the aluminum, the aluminum alloy, aluminum bronze and aluminum brass at the temperature of 180 DEG C-275 DEG C are solved through the preparation method.

The invention belongs to the technical field of friction stir welding, and particularly relates to a friction stir welding method for a heterogeneous metal layered composite plate. In order to solve the dilution problem of a composite plate body in the friction stir welding process of the composite plate, a compensation plate made of the same material as the composite plate body is added to a preset to-be-welded position on one side of the composite plate body in the composite plate, then friction stir welding is conducted, so that the dilution problem of the composite plate body in the friction stir welding process is avoided, and therefore the mechanical property and the functionality of a heterogeneous bimetal layered composite board joint are ensured. The dilution problem of the composite plate body is the key technical problem urgently needing to be solved in welding of the heterogeneous composite plate with the low composite layer proportion through the friction stir welding technology, the problem is solved through a simple, easy and reliable method, the obtained welding joint is high in comprehensive performance, and the wide industrial application prospect is achieved.

The invention discloses a welding system for a large thick-wall steel plate. The system comprises a portal type welding mechanism and a steel plate supporting structure. The system is characterized in that the steel plate supporting structure is arranged between two steel rails (1) of the portal type welding mechanism; the steel plate supporting structure is composed of a plurality of groups of carrier rollers (4) and is also equipped with a holding mechanism (5) which is mounted on a lifting hydraulic cylinder (53); an overturning bracket (6) which is hinged to a supporting seat (16) is arranged at one side of the portal type welding mechanism, and the overturning bracket (6) is that the rear surface is connected with a rotating hydraulic cylinder (18), the bottom part is equipped with a steel wire coil (12), and the top part is equipped with a fixed pulley (16); the steel wire coil (12) is connected with a motor (11). With the adoption of the welding system, the abutting, welding, side overturning and other processes in the welding process of a thick steel plate can be done; the stability and reliability in welding and overturning are ensured; workers can operate conveniently; the production efficiency is raised.

The invention relates to the technical field of electrodes, in particular to a floating simultaneous-four-point-projection-welding upper electrode structure which comprises a baseplate, shaft seats, a steering shaft seat, upper electrode head seats and an upper electrode body. Compared with the prior art, the floating simultaneous-four-point-projection-welding upper electrode structure has the advantages of simple structure, reliability in positioning, convenience in machining and high rigidity, the manufacturability problem of the projection-welding upper electrode structure is solved, welding of multiple bolts and a plate can be completed in one step, the welding process is stable and reliable, welding quality is stable, production efficiency is improved, and production cost is lowered; welding quality is guaranteed effectively, so that welding heat energy input can be lowered properly, and energy resources are saved; whenever the end face of an upper electrode head is worn, a user only needs to restore flatness of the end face, so that reusability of an upper electrode is improved, projection-welding electrode manufacturing cost is lowered, and tool maintainability is improved.

A high-energy beam welding method for a dual-metal layered composite board includes the following steps that (1) the material of the to-be-welded dual-metal layered composite board, the thickness h1 of a compounding board and the thickness h2 of a base board are determined, dust and oil stains on butt-joint surfaces of the composite board are removed, and the cleanliness of the butt-joint surfacesis maintained; (2) the to-be-welded composite board is subjected to butt-joint assembling and welded through a high-energy beam heat source, and it is guaranteed that the depth of fusion H1 is greater than or equal to 1.0h1 and less than or equal to 1.15h1; and (3) the composite board with the compounding board welded in the step (2) is overturned and fixed, the base board is welded through the high-energy beam heat source, and it is guaranteed that the depth of fusion H2 is greater than or equal to 0.9h2 and less than or equal to 1.0h2, and the sum of H1 and H2 is less than or equal to h1+h2+0.30mm and greater than or equal to h1+h2+0.01mm, so that high-energy beam welding of the dual-metal layered composite board is completed. The welding method solves the problems that when existing high-energy beam welding technologies are used for single-face welding and double-face forming of dual-metal layered composite boards, compounding boards are seriously diluted and the comprehensive performance of joints is obviously affected, and has the advantages that under the condition of no machining groove, the diluting rate of compounding boards can be obviously lowered and the joint performance of metal layered composite boards is improved.

The invention provides a cooling system of a device special for welding of a projection welding nut. The cooling system comprises an upper electrode body cooling system and a lower electrode body cooling system, wherein the upper electrode body cooling system comprises an upper water inlet mechanism and an upper water outlet mechanism; the upper water inlet mechanism and the upper water outlet mechanism are connected with a hollow upper holding rod of an upper electrode body; the lower electrode body cooling system comprises a lower water inlet mechanism and a lower water outlet mechanism; and the lower water inlet mechanism and the lower water outlet mechanism are connected with a hollow lower holding rod of a lower electrode body. According to the cooling system, the water inlet/outlet mechanisms and direct pipelines are added in the electrode bodies, cold water can enter the electrode bodies through the water inlet/outlet mechanisms and the direct pipelines to cool the electrode bodies, water cooling cycle operation is carried out through the water inlet/outlet mechanisms and the direct pipelines, the cooling efficiency is improved, the welding process is stable and reliable, the continuous working time is effectively prolonged, the production efficiency is improved, the tooling maintenance cost is reduced, and the utilization cycle and service life of electrodes are prolonged.

The invention discloses a multi-function precise aluminum welding machine circuit. The multi-function precise aluminum welding machine circuit is characterized in that the multi-function precise aluminum welding machine circuit comprises a high-power insulating transformer and an auxiliary insulating transformer, and the output end of high-power insulating transformer is connected to a rectification smoothing circuit; and the auxiliary insulating transformer is connected to a full-digitization operating faceplate, a 32-bit high-speed ARM controller and the like. According to the multi-function precise aluminum welding machine circuit, a plurality of welding modes can be achieved, and a continuous precise aluminum welding mode is an original function, so that the function that a thin aluminum plate can be precisely welded is achieved, the heat input quantity is greatly lowered, and deformation of a product is small; and the easy, convenient and quick operating property can be enough to surpass laser welding repair, so that the requirements of users for a larger range are met.

The invention discloses a satellite-borne L wide beam antenna. The antenna comprises a metal supporting body extending along a vertical direction, a square oscillator transversely extends from the topend of the metal support body, and the metal support body is vertically provided with four choke grooves which are arranged along the circumferential direction and are adjacent to each other at an angle of 90 degrees. The choke grooves extend upwards and divide the square oscillator into four square secondary oscillators which separately a first secondary oscillator, a second secondary oscillator, a third secondary oscillator and a fourth secondary oscillator which are sequentially adjacent in the circumferential direction. The first secondary oscillator and the third secondary oscillator which are opposite to each other form a first oscillator pair, and the second secondary oscillator and the fourth secondary oscillator which are opposite to each other form a second oscillator pair. A gap is reserved between the lower end of each choke groove and the bottom face of the metal supporting body, the lower end of the metal supporting body is connected with a bottom plate, and a circular polarizer is arranged below the bottom plate and is connected with a signal input port. The satellite-borne L wide beam antenna adopts the arrangement form of the symmetrical oscillators and is simplein structure, the feeder welding is stable and firm, and the width of beams is increased.

The invention provides a novel laser welding jig for a trial-manufacture vehicle. The novel laser welding tire film clamp comprises an upper cover plate, tire mold framework X-direction positioning plates, a spring pressing mechanism and partition plates; the number of the tire mold framework X-direction positioning plates is provided are two, and are made of rectangular plates correspondingly, one ends of the tire mold framework X-direction positioning plates are of polygonal structures, extending blocks are arranged at the top angles of the lower ends of the tire mold framework X-direction positioning plates, and a plurality of equal-spacing notches are formed in the upper side walls of the tire mold framework X-direction positioning plates; and the plurality of partition plates are arranged, one ends of the partition plates are clamped in the notches of the two tire mold framework X-direction positioning plates in a buckling mode to form a tire mold framework, the tire mold framework is in a plurality of connected Chinese character "jing" structures, and the upper cover plate is fixedly arranged on the tire mold framework; the spring pressing mechanism is fixedly arranged at oneends of the partition plates; and the invention further provides a use method of the novel laser welding jig for the trial-manufacture vehicle. According to the jig, the manual adjustment amount of the jig is reduced to the maximum degree, so that the trial manufacture efficiency of sample cars is improved, and the sample car trial manufacture is made to reflect actual production to a higher degree.