Double beam pulse laser welding method for Ti2A1Nb-based intermetallic compound

The invention provides a double beam pulse laser welding method for a Ti2A1Nb-based intermetallic compound. The method adopts a solid-state laser for welding. Before welding, the surface oxide skin, greasy dirt and other impurities of the Ti2A1Nb-based intermetallic compound are cleaned up to guarantee that a butt joint assembly clearance is less than 0.15 millimeter, then double beams are adopted for welding through using a solid-state laser pulse mode, during welding, 99.99 percent of high-purity argon is adopted to conduct welding seam front surface protection and welding seam back surface protection, no wire filling deep penetration welding is adopted during welding, and base metal automatically melts to form the welding seam. The laser welding method provided by the invention can realize effective connection of 1 to 3-millimeter-thick Ti2A1Nb-based intermetallic compound, reduce the crack removing tendency in the welding process, enhance the stability of the welding process, and improve ...

Welding device for titanium alloy skin structural member for framework

The invention discloses a welding device for a titanium alloy skin structural member for a framework. The welding device mainly comprises a molded surface pressing plate, clamping components, pressing parts, line marking blocks and a plug block, wherein welding grooves are formed in the molded surface pressing plate having welding positioning references; the molded surface pressing plate presses and fixes an outer skin of a to-be-welded part under the effect of the clamping components; the plug block is disposed at the edge of the skin for preventing welding deformation; the pressing parts are arranged near welding lines and are used for performing multi-point fixation for the titanium alloy skin so as to guarantee effective and tight fit of the skin and the framework and to guarantee the precision and the quality of the welding lines. The welding device is made of austenitic stainless steel, so that the welding device is suitable for different high-energy beam welding methods. The contour ...

Electric resistance welding method of symmetrical rib-skin plate welded light metal structure

The invention provides an electric resistance welding method of a symmetrical rib-skin plate welded light metal structure and belongs to the technical field of metal structure manufacturing. According to the electric resistance welding method, a transition electrode matched with the inner cavity of a framework in shape is utilized and plugged in the inner side of the cavity at a welding position, a welding electrode is designed and polished according to a triangular oblique plane angle; a conventional electric resistance welding of applying electrode force up and down is adopted to allow the welding current to flow through an upper electrode, an upper skin, the transition electrode, a lower skin and a lower electrode to form a circuit; meanwhile, two welding cores are formed between the upper skin and the upper side surface of the framework and the lower skin and the lower side surface of the framework simultaneously; the electrode shape and the electrode pressure are adjusted, and the ...

Gas protection device for welded joint formed by laser flexible welding

The invention provides a gas protection device for a welded joint formed by laser flexible welding. Two fixing bolts are mounted on a welding head; a protection gas nozzle is connected to a height adjustment plate; a sliding chute is formed in the height adjustment plate, so that the height adjustment plate can be used for adjusting the height of the protection gas nozzle and a transverse distance between the protection gas nozzle and the welding head; a fixed angle is formed at the lower end of the height adjustment plate; the gas nozzle is always in an optimal protection gas lateral blowing angle; the section of a protection gas spraying opening is an elliptical section. By the chute in the height adjustment plate, nuts on the fixing bolts and the fixed angle at the lower end of the height adjustment plate, the upper and lower distance and the left and right distance of the protection gas nozzle can be adjusted, and the angle of the protection gas nozzle can be fixed; therefore, the welded ...

Method and device for acquiring blood relationship data among heterogeneous data

The invention provides a method and device for obtaining blood relationship data between heterogeneous data, and the method comprises the steps: collecting offline heterogeneous data, and collecting online heterogeneous data based on a heterogeneous data extraction technology of metadata; the method comprises the following steps of: performing distributed metadata acquisition on full-life-cycle data of various data in heterogeneous data by adopting each sub-node in a distributed system, and converging the distributed metadata to a main node in the distributed system; and enabling the main node to perform deduplication fusion operation on the distributed metadata to obtain global blood relationship data corresponding to the full-life-cycle data of various types of data in the heterogeneous data. According to the method and the device, the heterogeneous data can be accurately acquired, the full life cycle data of various data of the heterogeneous data in the distributed system can be subjected ...

Method and device for forming skin type outer wing surface of titanium alloy thin-wall framework

The invention discloses a forming method and device for a titanium alloy thin-wall framework skin type outer wing surface. The method comprises the steps of obtaining a process model according to an obtained supporting block and an obtained pressing block which are matched with each other, and arranging a lattice structure model at a variable part of an outer wing surface; combining the process model and the lattice structure model to obtain a to-be-printed model; the to-be-printed model is printed and formed, and redundant supporting blocks are removed; removing the process allowance at the rotating shaft part of the outer wing surface; and redundant pressing blocks are removed, and the formed outer wing surface is obtained.

Thin-wall aluminum alloy cylindrical structure laser powder feeding deposition forming repairing method

A laser powder feeding deposition forming repairing method for a thin-wall aluminum alloy cylindrical structure comprises the steps that oil stains on the surface of a to-be-repaired area of the aluminum alloy cylindrical structure are cleaned and removed; a laser beam acts on a to-be-repaired area on the surface of the aluminum alloy cylindrical structural part (3) through high-frequency oscillation scanning in a reciprocating motion mode through a laser scanning galvanometer (1), a molten pool is formed, and meanwhile, the surface of the aluminum alloy cylindrical structural part (3) is heated through flames on the side of the laser beam; aluminum alloy powder is conveyed into the molten pool through a powder conveying guide pipe (9), and inert gas is conveyed into the molten pool through a protective gas conveying guide pipe (8) to form a protective atmosphere; and the powder conveying guide pipe (9) and the shielding gas conveying guide pipe (8) finish scanning forming of the to-be-repaired ...

Movable block combined type hot forming turnup mold and use method

The invention discloses a movable block combined type hot forming turnup mold and a use method, and belongs to the field of machining of precision sheet metal. The movable block combined type hot forming turnup mold comprises a lower mold body, an upper mold body, a wedge, a positioning pressing block, a scribed pin and a movable lip limit block, and the external profile of an air inlet channel serves as a standard. Turnup formation and hot shaping are carried out on the aluminum alloy thin-wall air inlet channel with a complex turnup structure through the hot forming technology, the air inlet channel is accurately positioned through the movable limit block in the mold, and the problem that turnup of a lip of the air inlet channel is difficult is solved. A part can be taken out by taking down the movable limit block after being formed, and the problem that demolding is difficult after turnup of the air inlet channel is conducted is solved. The movable block combined type hot forming turnup ...

Device for prolonging the lifetime of resistance spot welding electrode

The present invention relates to one kind of life increasing device for resistance spot welding electrode, and belongs to the field of resistance spot welding technology. The device includes one upper movable rack, one upper rack connected movably to the upper movable rack, one lower movable rack, one lower rack connected movably to the lower movable rack, one upper main shaft, one lower main shaft, springs separately between one main shaft and one rack, one arced upper flywheel, one arced lower flywheel, one upper ratchet wheel mechanism, one lower ratchet wheel mechanism, copper tabs on the flywheels, one upper link rod mechanism, one lower link rod mechanism, one upper hook mechanism and one lower hook mechanism. It has the advantages of reduced alloying, less wear, less pitting corrosion, less heat fatigue and long electrode life.

Laser welding method for Ti2A1Nb intermetallic compound

The invention discloses a laser welding method for a Ti2A1Nb intermetallic compound. Impurities such as oxidized skins, oil stains and the like on the surface of a Ti2AlNb plate are cleaned. An Nd: YAG(Neodymium-doped Yttrium Aluminum Garnet) solid laser adopting a pulse square pulse output mode is used for welding and high-purity argon is adopted for front-and-back side protection of a welding line. Zigzag waves in oscillation attenuation are used for arc suppression of the welding line. The generation of cold cracks of the welding line is prevented and the Ti2A1Nb intermetallic compound laser welding line with good surface quality and excellent comprehensive mechanical performance can be obtained. The internal quality and the appearance quality of the welding line are excellent. The joint of the welding line is smooth and nice in appearance without defects such as oxidized parts, cracks and the like, and the comprehensive performance of the welding line is good.

Device for prolonging the lifetime of resistance spot welding electrode

Arc ending method for high-temperature alloy laser welding

The invention discloses an arc ending method for high-temperature alloy laser welding. An arc ending process of a high-temperature alloy laser weld includes three ending phases, namely first, second and third ending phases; the ending phases employ scanning directions: the first ending phase employs a regular direction, the second ending phase employs a reverse direction, and the third ending phase employs the regular direction; the ending phases successively operate to produce reciprocated laser scanning actions, and a bath at the welding arc end position is repeatedly scanned. During arc ending, laser output power waveforms of the ending phases are continuously attenuating triangular waves; laser output power attenuates into basic value in ending pulse. The method has the advantages that presence time of the ending bath is appropriately prolonged, gas in the bath is fully spilled, ending dense pores are avoided, and welding arc pits are downsized; on the premise of not using ending plates ...