43results about How to "Shorten welding cycle" patented technology

The present invention relates to relates to welding method, and is especially ultrasonic brazing process of obtain composite brazed seam in aluminum-base composite material. The process includes the following steps: 1. filling brazing alloy; 2. primary brazing; and 3. ultrasonic vibration treatment to obtain composite brazed seam in aluminum-base composite material. The said brazing process can obtain brazed joint with greatly improved mechanical performance and heat expansion performance, low heat expansion coefficient, and high strength near that of the mother material.

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.

The invention relates to a welding technology in the equipment manufacture industry and relates a special welding technology of an MCL (Mean Control Limit) type horizontally-split centrifugal compressor welder casing, in particular to a welding technology of a megaton ethane centrifugal compressor welder casing with forgeable pieces of 16 Mn and Q345R and ZQ230-450 materials. Gas shielded welding is adopted to weld the welder casing with the forgeable pieces of 16 and the Q345R low alloyed steel, and an electrode in a brand of H08Mn2SiS with a diameter shown in the specification, power supply polarity of DCRP (Direct Current Reverse Polarity) is adopted and comprises fore-welding treatment, welding process and post-welding treatment, wherein the welding process comprises the following process parameters: a welding current is 250-280 A, a welding voltage is 28-32 V, a protective mixed gas comprises 80 percent by volume of Ar and 20 percent by volume of CO2, a welding speed is 280-320 mm/min, the dry extension is 20-25 mm, and the gas flow is 15-20 L/min. The invention can solve the problems of welding deformation, layered tearing, low welding efficiency, and the like and ensure the welding seam strength by selecting an MAG (Metal Active Gas) shielded welding material with similar chemical contents and matched strength with a welder casing material.

The invention provides a steel nuclear power containment circular seam submerged arc automatic horizontal welding process. By means of the process, the quality of welded products is stable. The process comprises the steps of (1) determining pre-welding grooves and preparing welding materials; (2) assembling welded parts within the assembly interval range of 0-10 mm and the alignment tolerance range of 0-7 mm; (3) preheating a weld joint between the welded parts at the preheating temperature greater than or equal to 75 DEG C, wherein the preheating width on the two sides of the weld joint is greater than or equal to twice as thick as the welded parts and is greater than or equal to 100 mm; (4) conducting backing welding on the grooves and the truncated edge of the root of the weld joint between the welded parts to form a backing welding pass, conducting multi-layer and multi-pass welding pass filling welding on the grooves on the front side and the back side to form filling welding passes, conducting multi-layer and multi-pass covering welding on the grooves on the front side and the back side to form covering welding passes, controlling the temperature between welding layers to be93-200 DEG C in the welding process and taking measures to control welding deformation in the welding process; and (5) conducting weld joint detection and determining whether the weld joint is qualified.

The invention relates to a laser welding tool for an engine hood of a large aircraft. The laser welding tool comprises a supporting frame, a mold frame, a cylinder, a transverse beam and a mold bracket; the mold frame, the cylinder and the mold bracket are mounted on the supporting frame; the mold bracket is mounted at the bottom of the supporting frame, and the mold frame is arranged above the mold bracket correspondingly; and the cylinder is mounted on the supporting frame, the transverse beam is rotatably mounted on the mold frame through a rotating seat, one end of the transverse beam is connected with the cylinder to form a lever structure with the rotating seat as the pivot, and the other end of the transverse beam is detachably connected with the mold frame. The laser welding tool is simple in construction, reasonable in structure and convenient to use and is used for clamping and disassembling of parts in the laser welding process of the engine hood of the large aircraft, the laser welding tool is high precision, accurate in positioning and low in damage to the parts, and the transverse beam does not need to be disassembled repeatedly, the time is reduced, and the processing efficiency is high.

The invention discloses a nickel-base welding wire dissimilar metal cold wire TIG all-position welding method used in a welding process of a connection pipe of a main device pressure container in a nuclear island and a connection pipe safety end, and comprising the steps: pre-processing a plurality of to-be-welded connection pipes of the main device pressure container in the nuclear island and the corresponding connection pipe safety ends; and randomly selecting the plurality of to-be-welded connection pipes of the main device pressure container in the nuclear island and the corresponding connection pipe safety ends for performing all-position welding butting joint simultaneously so as to finish the welding of the connection pipes of the main device pressure container in the nuclear island and the corresponding connection pipe safety ends. According to the method disclosed by the invention, the welding period is short, and welding defects of air holes, slag inclusion, non-fusing and the like can be effectively avoided simultaneously.

The invention provides a permanent locating segment assembling and and welding method for a rack and a leg of a drilling platform. The method comprises the following steps: at first, an angular heating sheet is utilized to preheat both a leg and a rack; then assembling and welding permanent locating segments in sequence; after finish of permanent locating segment welding, carrying out after-heating; and after completion of after-heating, conducting pre-heating, welding and after-heating on product seams. The rack is inserted into the leg in a penetrating manner, and the connecting part of the leg and the rack is subjected to welding combination through permanent locating segment welding points. The method has the positive results that firstly, the welding stress and the welding deformation are reduced, and the welding quality and precision are improved; secondly, the welding efficiency is improved and the welding period is shortened; and thirdly, the labor intensity of workers is reduced. The method is suitable for rack and leg welding.

The invention relates to the field of ship manufacturing, and discloses an electro-gas welding method for a 42-50mm high-strength steel plate for a ship body, which comprises the following steps of: arranging a single-sided V-shaped groove at a welding position; the back of the weld joint is welded and fixed with a steel plate; a gasket is installed on the back face of the welding groove, and the gasket is tightly attached to the steel plate through a wooden wedge; a welding guide rail and a welding trolley are installed on the front face of the welding groove in the direction parallel to the welding groove; the angle of a welding gun is adjusted, the angle between the welding gun and the surface of the workpiece to be welded is 10-15 degrees, the flow of protective gas is 35 L/min, the welding current is 450-470 A, the welding voltage is 40-44 V, the welding speed is 4 +/-1 cm/min, and the front face and the back face of a welding seam are formed at a time. On the premise that preheating is not conducted before welding, electro-gas welding of the 42-50 mm high-strength steel plate for the ship body can be met, the purpose of outdoor efficient welding construction is achieved, the welding period is shortened, the welding seam quality is improved, and the post-welding grinding time is shortened.

The invention discloses an assembling method for an inner arc frame and an outer arc frame of a slab continuous casting fan-shaped section. The assembling method comprises the steps that 1, a robot isadopted for batch surfacing of seat blocks; 2, a plurality of second marks are arranged on a welding platform in the length direction of a main board according to the positions of limiting parts andthe actual welding positions of the seat blocks and the main board, a first positioning component used for positioning the seat blocks is fixed to each second mark, and a first cushion block used forsupporting the main board to form an interval space between the main board and the welding platform is fixed on the welding platform; 3, the main board is placed on the first cushion block, the main board is adjusted to enable the wide edge of the main board to abut against a limiting component, and after the main board abuts against the first positioning components and the seat blocks, the main board and the seat blocks are welded; and 4, the main board is placed on second positioning components, a head frame is placed on a second cushion block, and the head frame and the main board are welded. The method has the advantages that the welding assembly technological process is simplified, the assembly efficiency is improved, and the pre-welding assembly precision is improved.

The invention relates to a rotary turnover device and method for a heavy product, belongs to the technical field of turnover of heavy products, and solves the problems of low turnover efficiency and poor safety of the heavy product in the prior art. The device comprises a round wheel assembly, a supporting frame and a plurality of carrier rollers, the carrier rollers are arranged on the supporting frame and rotationally connected with the supporting frame, the round wheel assembly is arranged in the supporting frame and located above the carrier rollers, the cylindrical surface of the round wheel assembly makes contact with the cylindrical surfaces of the carrier rollers, the round wheel assembly is provided with through holes, the heavy products are arranged in the through holes, and when the carrier rollers are rotated, the round wheel assembly drives the heavy products to turn over. The rotary turnover device is high in heavy product overturning efficiency and good in safety.