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2909results about How to "Beautiful shape" patented technology

High-strength and high-tenacity gas shielded welding wire

The invention discloses a high-strength and high-tenacity gas shielded welding wire. The welding wire comprises the following chemical composition in percentage by mass: 0.02 to 0.12 percent of carbon (C), 1.20 to 2.10 percent of manganese (Mn), 0.20 to 1.00 percent of silicon (Si), less than or equal to 0.010 percent of sulfur (S), less than or equal to 0.015 percent of phosphorus (P), 2.00 to 3.50 percent of nickel (Ni), 0.20 to 0.80 percent of molybdenum (Mo), 0.20 to 0.30 percent of titanium (Ti), 0.60 to 1.20 percent of chromium (Cr), less than or equal to 0.05 percent of vanadium (V), 0.005 to 0.010 percent of boron (B), less than or equal to 0.015 percent of aluminum (Al), less than or equal to 0.35 percent of copper (Cu) and the balance of iron (Fe). The welding wire is used for welding steels of a strength grade of between 850 and 950MPa; and under the protection of a mixed gas (80 percent of argon (Ar) and 20 percent of carbon dioxide (CO2)), the weld metal tensile strength of the welding wire is more than or equal to 850MPa, the yield strength is more than or equal to 720MPa, the elongation is more than or equal to 22 percent, and the low-temperature impact toughness Akv is more than or equal to 181J at the temperature of -30 DEG C, or more than or equal to 175J at the temperature of -40 DEG C, or more than or equal to 162J at the temperature of -50 DEG C.
Owner:CHENGDU XINDAYANG WELDING MATERIAL

Multifunctional digitized welding machine

The invention relates to a multifunctional digitized welding machine, which comprises a full-bridge type inversion main circuit, a control circuit and a soft switch PWM (Pulse-Width Modulation) driving circuit, wherein the full-bridge type inversion main circuit is composed of an IGBT (Insulated Gate Bipolar Translator); the soft switch PWM driving circuit of a symmetric carrier is based on a CPLD (Complex Programmable Logic Device) or FPGA (Field Programmable Gate Array); the inversion main circuit comprises a rectifying filtering module, an IGBT full-bridge inversion module, a main transformer and a secondary rectifying filtering module; the control circuit comprises a DSP (Digital Signal Processor) control processor, a manual idle-dropping circuit, a regulating, detecting and sampling circuit for a feedback current and voltage signal outputted by the welding machine, a collecting and setting circuit for a feeding speed and given voltage of the welding machine, a display circuit for an interface and parameter of an external keyboard and a communication circuit connected to a PC (Personal Computer); the regulating, detecting and sampling circuit for the feedback current and voltage signal outputted by the welding machine comprises a Hall voltage sensor for detecting a feedback arc voltage outputted by the welding machine and a Hall current sensor for detecting an output current of the welding machine; and the collecting and setting circuit for the feeding speed and given voltage of the welding machine comprises a collecting circuit for a given voltage and given current, namely the feeding speed, on a panel of a feeder.
Owner:PANDA ELECTRONICS GROUP +2

Method for combined welding of austenitic stainless steel moderate thickness plate

The invention relates to a method for combined welding of an austenitic stainless steel moderate thickness plate. The method comprises the steps of opening a V-shaped groove at the position of the to-be-welded butt joint surface of austenitic stainless steel; polishing and cleaning the surface of a to-be-welded workpiece and the position of the V-shaped groove; performing gapless tight fixed assembly of the workpiece, performing spot welding fixation on a run-on plate, an arc blowout plate and a test plate; pre-leading in protective gas prior to butt welding, guaranteeing that sufficient protective atmosphere is formed on the surface of the stainless steel groove and the bottoms of the weld joints; adopting pulsed plasma arc welding to perform bottoming welding; adopting low carbon welding wires to perform cosmetic welding of pulse wire filling argon tungsten-arc welding, performing the bottoming welding of the pulsed plasma arc welding and cosmetic welding of the pulse wire filling argon tungsten-arc welding simultaneously, and cooling the workpiece while performing the welding. The PC-PAW bottoming welding is adopted, the micropore effect is utilized to achieve one-side welding and double-sided free forming of the moderate thickness plate, the backs of the weld joints are smoothly formed and are free of cracks and edge snapping defects, the process is stable and easy to achieve, and the quality is reliable.
Owner:SHANDONG UNIV

Welding process of low temperature steel welding body case

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.
Owner:SHENYANG BLOWER WORKS GROUP CORP

Flux-cored steel belt for build-up welding and preparation method thereof

The invention discloses a resurfacing welding used drug cored steel strap and the preparation method. The steel strap is prepared from a mild steel strap and drug powder enwrapped therein, the shape of the steel strap is a tube with the longitudinal cross-section to be in a long and flat shape or in a similar rectangle shape, the longitudinal length can be determined randomly, and the transverse sides of the steel strap are connected in a seam manner or a related joint manner; the drug powder is uniformly filled in the tube rolled from the steel strap, wherein the particle diameter of the drug powder is smaller than 120 Mum, the components include (by weight) 45-70 parts of high carbon ferrochrome, 5-35 parts of ferrovanadium, 1-8 parts of No.75 ferrosilicon, 1-10 parts of high carbon ferromanganese, 2-16 parts of ferroboron, 1-8 parts of ferrotitanium, 0-5 parts of ferroniobium, 2-8 parts of ferromolybdenum, 0-10 parts of graphite, 0-5 parts of fluorite and 0-6 parts of potassium titanate. The drug cored steel strap adopting the invention can efficiently improve the abrasion resistance of the metal on the resurfacing welding layer and the stability of the electric arc, and can be coiled into coils, thereby being suitable for continuous automatic resurfacing welding.
Owner:SHANDONG UNIV

Plasma-melting electrode electric arc dynamic composite welding device and welding method thereof

The invention provides a plasma-melting electrode electric arc dynamic composite welding device and a welding method thereof. A plasma arc welding gun is combined with a melting electrode electric arc welding gun to obtain a composite welding gun; the two electric arc welding guns are respectively connected with a negative pole of a direct-current pulsed plasma arc welding power supply and a positive pole of a direct-current pulsed melting electrode arc welding power supply and are also connected with a negative pole and a positive pole of an argon arc welding power supply (a TIG power supply); and a negative pole of the plasma arc welding power supply and a positive pole of the melting electrode arc welding power supply are connected with a workpiece. In order to prevent electromagnetic interference between a plasma arc and a melting electrode electric arc during welding, a pulsed coordination control method is used, namely, when melting electrode electric arc current waveform is a pulsed basic value pilot arc, the plasma arc is a pulse peak value, and welding is carried out; and when plasma arc current waveform is a pulse basic value, the melting electrode arc is pulse peak value welding current, and so forth. By the plasma-melting electrode electric arc dynamic composite welding device and the welding method thereof, the problems that electromagnetic interference between electric arcs is large, parameters are adjusted complexly, and electrodes are burnt down severely are solved.
Owner:HARBIN ENG UNIV

All-position automatic welding method for pipeline circumferential weld

The invention discloses an all-position automatic welding method for a pipeline circumferential weld and belongs to the technical field of pipeline circumferential weld welding. The method includes the following steps that firstly, steel pipes needing welding are machined to be provided with groove end faces; secondly, welding technology parameters are typed in a controller program according to the preset welding technology; thirdly, the two welded steel pipes are assembled; fourthly, one of the steel pipes is provided with a welding rail; fifthly, the welding ends of the two steel pipes are preheated before welding; sixthly, a single welding torch is used for performing root welding on grooves; seventhly, a double welding torch is used for performing hot welding, filling welding and cosmetic welding on the grooves. According to the all-position automatic welding method for the pipeline circumferential weld, due to the fact that the groove type is designed, the root welding technology, the filling welding technology and the cosmetic welding technology are adopted, the defects that in the prior art, the welding efficiency is low, a large number of welding materials are consumed, a large number of weld defects exist, the welding joint performance is poor, and the requirement for the operating skills of welders is high; or welding equipment is high in cost, and operating and maintaining are difficult are overcome.
Owner:BC P INC CHINA NAT PETROLEUM CORP +1

Steel box girder matched with cellular steel web plate

The invention discloses a steel box girder matched with a cellular steel web plate. The steel box girder comprises two H-shaped steel or I-shaped steel used as web plate components of the steel box girder, further comprises a steel top plate, a steel bottom plate, a clapboard and a reinforcing rib and is characterized in that a plurality of through holes of the same shapes and intervals are formed in two web plates; the steel top plate and the steel bottom plate of the steel box girder are fixedly connected with upper flanges or lower flanges of the web plate components respectively; and a certain number of transverse clapboards and the reinforcing rib are configured. Compared with a solid web steel box girder, the cellular steel box girder disclosed by the invention has the advantages that the resistance capacity and bending resistance rigidity can be increased by about 30% under the condition of same steel use amount; the torsional rigidity of the cellular steel box girder is also greatly increased; simultaneously, the overall stability of the web plate cellular component and the local stability of an overhung flange of the box girder are improved; the use amount of steels is reduced, so that the cost is reduced; and furthermore, the steel box girder disclosed by the invention is attractive in appearance and convenient to maintain.
Owner:GUANGXI UNIV +1

Structure and production method of weft-knitted jacquard shoe upper material

The invention belongs to the field of textiles and provides a structure and a production method of a weft-knitted jacquard shoe upper material. According to the weft-knitted jacquard shoe upper material, terylen low-melting-point color filaments with skin-core structures are adopted, the meshes, esthetic appearance and air permeability of the shoe upper material are realized by utilizing air-layer jacquard tissues as fundamental tissues, loop accumulation tissues or loop transfer tissues on a dual-way jacquard dual-side loop transfer round weft machine; by virtue of cooperation between colors and structural jacquards, functional sections of the shoe upper material are realized; during aftertreatment, a skin layer is fused at a certain temperature under a certain pressure, so that dual-side weft-knitted jacquard shoe upper fabric loops are mutually glued, then cooled and solidified, so that the shoe upper material with appropriate rigidity and hand feeling is obtained; spandex can also be added, so that the elasticity and the density of the fabric are enhanced. The weft-knitted jacquard shoe upper material is variable in pattern, color and style, beautiful in appearance, portable and flexible, favorable in air permeability and comfort in wear; traditional working procedures of cutting, sewing, bonding and the like for shoe materials are not needed, so that the equipment investment and the labor cost are lowered.
Owner:JIANGNAN UNIV

Welding method for high-temperature titanium alloy thin-wall casting electron beam

Disclosed is a welding method for a high-temperature titanium alloy thin-wall casting electron beam. High-temperature titanium alloy is preheated, subjected to heat preservation and then welded. A weld joint can obtain high energy through preheating before welding. A molten pool can be pushed forwards continuously during welding, so that the shape of the weld joint is beautiful. In addition, the area scanned by preheating before welding is larger than that obtained during welding, thus the structure of a weldment weak link, namely a heat affected zone, is heated, the temperature gradient of the weld joint and the heat affected zone is reduced, thus the structure in the heat affected zone can achieve smooth transition, and the influence caused by incoordinate deformation is weakened. For a thick weldment, the condition of incomplete melting of the weld joint can be avoided through preheating before welding. The area scanned by postweld heat treatment is the same as that of preheating before welding, the cooling rate of the weld joint and part of the heat affected zone is lowered, many acicular martensite and widmannstatten structures are prevented from being generated, and the quality of the weld joint is improved obviously.
Owner:重庆两航金属材料有限公司

Cored welding strip applied in resurfacing welding and preparation method thereof

The invention discloses a novel resurfacing welding cored welding strip which consists of a steel tube circled by steel strips and drug powder wrapped in the steel tube, the steel strips comprises an upper steel strip and a lower steel strip which can be purchased in the market. The shape of the steel tube circled by steel strips is that the longitudinal cross section is long flat form or rectangle-like shape, the longitudinal length is determined at will, and the steel tube can be cut out at will or winded into a tray according to requirements. The transverse edges of the upper steel strip and the lower steel strip are connected at the upper steel strip side in a related joint form, and the drug powder is filled in the steel tube circled by the steel strips evenly with the filling rate being 20-80%. According to the different types of resurfacing metals, the content of alloy element in the resurfacing welding cored welding strip is different. The cored welding strip has simple production equipment and technique, and low production cost, thus overcoming the defect that alloy welding filament used for filament resurfacing welding is difficult to produce and the problems of large investment on production equipment, high production cost and expensive price in cored welding filament production.
Owner:SHANDONG UNIV
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