41results about How to "Realize all position welding" patented technology

The invention relates to the technical field of welding devices, in particular to a crawling welding robot. The robot comprises an adjustable magnetic adsorption module, wheel-covered travelling mechanisms, a crawling machine frame and a welding load device, wherein the welding load device is arranged on the crawling machine frame; the wheel-covered travelling mechanisms are arranged at the two opposite ends of the crawling machine frame and are used for providing crawling power for the crawling machine frame; and the adjustable magnetic adsorption module is arranged on the crawling machine frame and is arranged between the two wheel-covered travelling mechanisms. According to the robot, the wheel-covered travelling mechanisms are arranged so as to realize rail-free and guide-free crawling, moving on a large and medium-sized plane or the surface of a cambered surface welding structural part is realized, vertical crawling on walls is realized, welding operation can be conducted during forward moving or backward moving, full-position welding of large and medium-sized structural parts can be realized, the welding auxiliary time can be obviously reduced, and the production efficiency is high; and the magnetic adsorption force is adjusted through the adjustable magnetic adsorption module, the crawling on flat plates and large-curvature arc plates can be realized, and working environment adaptability is high.

The invention discloses a metal powder-cored wire for welding X80 high-strength low-alloy pipeline steel. The metal powder-cored wire consists of a carbon steel strip and a metal powder core, wherein a formula of metal powder consists of low-carbon ferromanganese, ferrosilicon, ferrotitanium, nickel powder, ferromolybdenum, ferroboron, magnesium powder, rare earth fluoride and the balance of iron powder. The metal powder-cored wire is characterized by adopting an Ni-Mo-Ti-B alloy system to be applied to the root welding, filling and cover surface welding of the X80 high-strength low-alloy pipeline steel, in particular to the backing welding, so that the melting speed is fast, the melting efficiency is high, the all-position welding can be realized, the content of diffusible hydrogen is lower, and KV2(-45 DEG C) is higher than 100 J.

The invention discloses a seamless flux cored wire with good vertical position welding manufacturability, and relates to the field of welding materials. The seamless flux cored wire is composed of low carbon steel outer skin and flux core powder, and the flux core powder is prepared from the mixing of materials, by mass, 35%-50% of rutile, 2%-4% of dehydrated feldspar, 4%-6% of aluminum magnesium alloy, 2%-3% of ferrotitanium, 9%-14% of low carbon ferromanganese, 1%-2% of zircon sand, 3%-8% of aluminum oxide, 4%-6% of quartz, 0.5%-1% of sodium fluoride and the balance iron powder. According to the seamless flux cored wire with the good vertical position welding manufacturability, the flux core powder is added online synchronously, after the flux core powder is added into the outer skin steel belt, the outer skin steel belt is then subjected to rolling forming and welding seaming, and afterwards subjected to annealing, reducing and copper plating so that the seamless flux cored wire can be prepared. The prepared seamless flux cored wire is stable in mechanical property, low in diffusible hydrogen, high in moisture absorption performance, excellent in antirust performance, and good in welding manufacturability; meanwhile, all-position welding can be conducted, the seamless flux cored wire is particularly applicable to welding of position of vertical welding, and can be used for welding of a D36 level steel plate.

The invention discloses a high-toughness titanium alkaline type seamless flux-cored wire suitable for all-position welding. The flux-cored wire is composed of a low-carbon steel strip at the peripheryand flux core powder inside; and the flux core powder comprises the following components, by weight percentage: 30-40% of rutile, 1-2% of aluminum oxide, 2-4% of dehydrated feldspar, 1-3% of quartz,1-3% of zircon sand, 1-2% of rare earth oxide, 1-2% of silicon powder, 0.2-0.4% of ferroboron, 6-8% of nickel powder, 8-15% of metal manganese, 4-9% of magnesium powder and the balance iron powder andinevitable impurities. According to the flux-cored wire, a titanium alkaline slag system is adopted, the proportion of alloy elements is optimized, the content of mineral powder is adjusted, and under the protection of CO2 gas, horizontal, transverse and vertical position welding can be realized; the mechanical property is stable, the impact power at 40 DEG C below zero reaches 100J, the crack resistance is good, diffusible hydrogen is low, the moisture resistance is strong, the seawater corrosion resistance is good, and the anti-cracking ability is good.

A pulsed tungsten argon arc welding method comprises the following steps that (1) gas proportion of protective gas is determined; (2) composition of parent material is determined; (3) composition and diameter of a soldering wire is determined; (4) the welding is conducted according to the welding process specification. The welding process of the step (4) is characterized in that the requirements of the welding process comprise the steps that (a) the protective gas is the mixed gas of argon and oxygen, wherein at room temperature, the argon is 98% in volume, and the O2, namely the oxygen is 2% in volume; (b) it is guaranteed that the droplet transition is the one-pulse-one-droplet pulse jet flow transition in the welding process. According to the technical scheme, the pulsed tungsten argon arc welding method has the advantages that the welding spatter is small, bond area performance is improved, appearance of weld forms well, all position welding are applicable, and current range is wide.

The invention relates to an MIG welding solid-core welding wire for high-manganese austenite low-temperature steel and a welding process of the MIG welding solid-core welding wire. According to the technical scheme, the MIG welding solid-core welding wire for the high-manganese austenite low-temperature steel comprises the following chemical components: 0.20-0.60 wt% of C; si is less than or equal to 0.05 wt%; the content of Mn is 20-32 wt%; the content of Ni is 0.1 to 2 weight percent; the content of Cr is 0.1 to 1.8 wt%; the content of Cu is 0.55 to 1.00 wt%; the content of W is 0.5 to 1.9 weight percent; the content of Mo is 1.3 to 3.0 wt%; the content of Al is 0.5 to 2 weight percent; nb + V + Ti + B + RE < = 0.5 wt%; p < = 0.002 wt%; s < = 0.001 wt%; and the balance of Fe and inevitable impurities. Full-automatic and all-position welding can be achieved, the welding efficiency is high, forming is good, and the mechanical property is excellent; the strength of weld metal formed through inert gas protection is matched with that of high-manganese austenite low-temperature steel, the forming performance is good, the low-temperature toughness is excellent, and the technical requirements for the strength and ultralow-temperature toughness of the LNG storage tank at the working temperature of-196 DEG C can be met.

The invention discloses an inner hole rotary argon arc welding gun head of a pipe and a pipe plate and a welding method, and relates to the field of welding of heat exchanger pipe fittings and pipe plates. The gun head is mainly composed of a conductive mandrel, a tungsten electrode, an upper positioning insulation sleeve, a lower positioning insulation sleeve and an adjustable nut, the upper positioning insulation sleeve sleeves the upper part of the exterior of the conductive mandrel, the upper part of the upper positioning insulation sleeve is integrally connected with an annular plate for hanging and fixing the whole gun head, the adjustable nut is in threaded connection with the exterior of the upper positioning insulation sleeve, and a protective gas hole is formed in the conductive mandrel. An inlet of the protective gas hole is formed in the axial direction of the conductive mandrel, an outlet is located in the lower portion of the conductive mandrel and extends to the outer side of the conductive mandrel in the radial direction, the tungsten electrode is located below the protective gas hole, the lower positioning insulation sleeve further sleeves the bottom of the conductive mandrel, and a compression screw is further arranged on the bottom face of the conductive mandrel. An argon protective sleeve is further adopted during welding. According to the inner hole rotary argon arc welding gun head and the welding method, the stress corrosion resistance and crevice corrosion resistance stability of a connector are improved, and the safe use performance of equipment is improved.

The invention discloses a direct current motor improvement method. According to the method, an existing alternating current motor serves as a cylinder, four diodes are additionally arranged on the alternating current motor and are arranged on an aluminum plate to form a single-phase bridge circuit, then the output end of an alternating current welding machine is connected to the input of the bridge circuit, alternation is conducted through the diodes, and breakover is achieved so as to achieve improvement of the alternating current motor. When the electrowelding transformer current is transmitted in from 380 / 220v, the transmitting-out end of an electrowelding transformer is connected to 75 v, and it is presumed that a point A is positive, point A-D1-RL-direct current electric reactor-direct current diverter-D3-75v-negtive electrode is achieved; otherwise, when a point O is positive, O-D2-RL-direct current electric reactor-direct current diverter-D4-point A is achieved, meanwhile the alternating current conducts alternating breakover till ending according to the variable quantity of 50 HZ per second, and thus smooth and steady direct current is shifted in and output.

The invention discloses a construction method for all-position automatic welding of a hydropower-station super-size pressure steel tube. The construction method comprises the following steps that a round steel tube is assembled by steel tube tiles; positioned welding is conducted on the back joint of a steel tube welded joint; cleaning and polishing are conducted on a welded joint groove; weld preheating is conducted; a flexible railway is absorbed on steel tubes along a to-be-welded welded joint; a welding tractor conducts welding while walking on the flexible railway, automatic welding is conducted by the welding tractor through solid core wires, and meanwhile a rich-chlorine gas protective measure is arranged; ribbed ring lobe pieces are welded to the two ends of the steel tube; the steel tube is transported to a previous steel tube, and girth welding is conducted on the two steel tubes; and butt welding of ribbed rings are conducted. According to the construction method for all-position automatic welding of the hydropower-station super-size pressure steel tube, the flexible railway is adopted so that the welding tractor can freely crawl along the surface of the pressure steel tube, thus all-position welding is achieved, the labor intensity of workers is greatly relieved, and the welding efficiency is improved; and the welding tractor automatically completes welding in the whole process, so that the welding quality is stable and reliable.

The invention belongs to the technical field of laser welding, and in particular relates to an all-position laser welding system and a welding method, comprising a control system connected with a laser welding head, a tooling platform for carrying welding parts, and a laser transmitter for providing welding energy for the laser welding head ; The incident end is installed on the rotating part of the rotating disk. By setting the incident end on the rotating part of the rotating disk, the laser welding head can be driven by the rotating disk, and when the laser beam is emitted, the laser beam emitted by the laser welding head can rotate ±450 degrees around the rotation axis of the rotating disk , to realize all-position butt welding of thin-walled tubes with a diameter of 5-12 mm; the present invention installs the rotary disk on a position that can drive the laser welding head to perform linear motion on the x-axis, y-axis and z-axis of the three-dimensional coordinate system The moving assembly can adjust the position of the laser welding head, so that the rotation axis of the laser welding head can be on the same line as the axis of the welded pipe.

A gas-shielded flux-cored wire for arc welding, characterized in that the flux core composition includes the following components and mass percentages: TiO2? 20-22%, SiO21-4%, ZrO21-2.5%, Al2O31-3%, MgO ? 1.5%, AlF35~9%, NiF25~6%, Na2SiF61~6%, Ti3Al? 3~4%, Fe3Al4~6%, Co1~2%, the balance is Fe. The flux-cored welding wire of the present invention has excellent technological properties such as low hydrogen content in weld metal diffusion, small spatter, and few defects such as pore cracks, and the welded joint has excellent low-temperature impact toughness and excellent corrosion resistance, and is especially suitable for marine engineering equipment Welding of high-strength steel with a yield strength of 700MPa in the manufacturing industry.

The invention discloses a metal powder-cored flux-cored welding wire for X80 low-alloy high-strength pipeline steel welding, which is composed of a carbon steel strip and a metal powder core. , nickel powder, ferromolybdenum, ferroboron, magnesium powder, rare earth fluoride and the balance of iron powder. The present invention is characterized by adopting Ni-Mo-Ti-B alloy system, which is used for root welding, filling and capping welding of X80 low-alloy high-strength pipeline steel, and is especially recommended for root welding, with fast melting speed and good deposition High efficiency, all-position welding can be realized, the content of diffusible hydrogen is extremely low, and KV2 (‑45°C) is greater than 100J.

The invention relates to a manual arc welding electrode used for welding low-nitrogen and nonmagnetic naval steel. The technical solution is: the manual arc welding electrode is composed of 70-80wt% high-alloy steel core and 20-30wt% coating; the preparation method is to add water glass to the chemical components of the coating, stir, press It is produced by coating on the surface of high alloy steel core. Composition and mass content of high alloy steel core: C is 0.03-0.05%, Si is 0.2-0.4%, Cr is 23-25%, Mn is 8-10%, Ni is 17-20%, N is 0.25% ~0.45%, P≤0.006%, S≤0.003%, the balance is Fe and unavoidable impurities. The composition and mass content of the coating: 45-47% for marble, 20-23% for fluorite, 3-5% for lithium fluoride, 2-4% for quartz sand, 10-12% for rutile, nitrided Manganese is 6-8%, and the rest is iron powder. The welding seam metal formed by welding the low-nitrogen non-magnetic naval steel provided by the invention has the advantages of non-magnetism, high strength, good ductility and seawater corrosion resistance.

A special ultra-low hydrogen electrode for welding E911 steel high-pressure steam pipelines and a preparation method thereof. The invention belongs to the technical field of welding materials. The purpose of the invention is to ensure the uniform distribution of alloy elements in the welding seam of the E911 steel high-pressure steam pipeline, and to ensure the stability of the mechanical properties of long-term operation. The electrode of the present invention is prepared from a welding core and a coating, the coating is formed by mixing coating powder and potassium sodium water glass, and the coating powder is composed of 20 to 40 parts of calcite, carbonic acid 2-10 parts of barium, 17-28 parts of fluorite, 1-8 parts of quartz, 1-7 parts of rutile, 0.5-2 parts of soda ash, 1-6 parts of ferrosilicon, 1-5 parts of electrolytic manganese, 0.5-5 parts of metal chromium powder 5 parts, 0.5-4 parts of medium-carbon ferrochromium, 0.5-4 parts of metal molybdenum powder, 2-15 parts of iron powder, 0.5-2 parts of aluminum-magnesium alloy, 2-5 parts of metal tungsten and 0.5-3 parts of ferro-titanium boron made. Method: uniformly mix the coating powder with potassium sodium water glass, then press-coat it on the welding core, then dry it at room temperature, dry it at low temperature and dry it at high temperature in sequence to obtain the welding rod.

The invention discloses a high-toughness titanium alkaline type seamless flux-cored wire suitable for all-position welding. The flux-cored wire is composed of a low-carbon steel strip at the peripheryand flux core powder inside; and the flux core powder comprises the following components, by weight percentage: 30-40% of rutile, 1-2% of aluminum oxide, 2-4% of dehydrated feldspar, 1-3% of quartz,1-3% of zircon sand, 1-2% of rare earth oxide, 1-2% of silicon powder, 0.2-0.4% of ferroboron, 6-8% of nickel powder, 8-15% of metal manganese, 4-9% of magnesium powder and the balance iron powder andinevitable impurities. According to the flux-cored wire, a titanium alkaline slag system is adopted, the proportion of alloy elements is optimized, the content of mineral powder is adjusted, and under the protection of CO2 gas, horizontal, transverse and vertical position welding can be realized; the mechanical property is stable, the impact power at 40 DEG C below zero reaches 100J, the crack resistance is good, diffusible hydrogen is low, the moisture resistance is strong, the seawater corrosion resistance is good, and the anti-cracking ability is good.