739 results about "Weld metal" patented technology

An automatic welding system for metal parts, the automatic welding system comprising a welding platform (1), wherein a fixing box (2) is provided on the welding platform (1); a first electric motor (3) is provided in the fixing box (2); a lead screw (4) is provided on an output end of the first electric motor (3); a lead screw sleeve (5) is connected to an outer side of the lead screw (4); a limiting sliding block (6) is provided at the top of the lead screw sleeve (5); a right-angle bracket (7) is provided at the top of the limiting sliding block (6); a telescopic rod (8) is provided at the bottom of the right-angle bracket (7); a welding machine (9) is provided at a movable end of the telescopic rod (8); a supporting plate I (10) and a supporting plate II (11) are provided on the welding platform (1); a right-angle plate I (12) and a right-angle plate II (13) are provided above the supporting plate I (10) and the supporting plate II (11), respectively; both the connections between the supporting plate I (12) and the right-angle plate I (13), and between the supporting plate II (11) and the right-angle plate II (13) are made by means of supporting columns (14); a second electric motor (15) is provided on the right-angle plate I (12); a rotating rod (17) is connected to the right-angle plate II (13) by means of a bearing I (16); fixing seats (18) are provided on both the rotating rod (17) and an output shaft of the second electric motor (15); and a clamping assembly (19) is provided on each fixing seat (18). The automatic welding system solves the problem of being unable to weld metal parts from multiple angles in the prior art.

The invention discloses a clamping-adjustable metal pipe welding device, which belongs to the technical field of pipe welding, and comprises a main body mechanism for butting and welding metal pipes, and two adjusting mechanisms for adjusting the welding direction of the metal pipes are arranged on the main body mechanism; and a clamping mechanism for clamping the metal pipe is arranged on the adjusting mechanism. The arranged main body mechanism can automatically weld four butt joint faces of two metal pipes, meanwhile, the metal pipes with different splicing angles can be welded, the automation degree is high, and continuity is good; the adjusting mechanism can adjust the butt joint angle of the metal pipes, so that the device can weld the metal pipes with different postures and connection angles, and the application range is wide; the clamping mechanism can adjust the clamping position, so that the device can clamp metal pipes of different lengths, meanwhile, square pipes or round pipes of different sizes can be clamped, and use is convenient.

A method is provided for unsupervised 3D modeling and geometric measurement of additively manufactured parts. The method includes obtaining near-infrared (NIR) images for a welding process for a welded part. The welded part includes welded metal and agglomerated powder particles. The method also includes generating a multi-dimensional dataset based on the NIR images, including cropping the multi-dimensional dataset to a region of interest. The method also includes detecting melted regions in image layers of the multi-dimensional dataset to obtain an output volume. The method also includes detecting agglomerated powder in the output volume to obtain melt masks. Each melt mask indicates weld pixels for a respective image layer. The method also includes applying a multi-layer predictive model to account for multi-layer weld penetration, based on the melt masks, to obtain an output data mask that represents a 3D model and geometric measurements for the welded part.

The invention discloses a method for reducing pores by repair welding of internal defects of a thin-wall aluminum alloy casting. The method comprises the following steps: confirming and marking X-ray positions of the internal defects of the aluminum alloy casting; internal defects at the marked position are cleaned, the defects are required to be completely eliminated, and the cleaning position is smooth and has a certain groove angle; cleaning oil stains and oxidation films at the repair welding position of the casting; preheating the whole casting; welding a reverse support and adding a blowing protection tool; manual argon arc welding filling surfacing is carried out, arc surfacing is carried out from the periphery to the center, and excess weld metal is reserved; removing redundant weld joint materials of surfacing bulges of the casting; x-ray detection is conducted on the repaired casting, whether the pore defects generated after surfacing repair can meet related requirements or not is emphatically confirmed, and if pores gathered on the surface layer of a weld joint exist, the pores can be discharged through a hot pressing method. According to the method, through hole internal defect cleaning, reverse supporting, blowing protection increasing and arc drawing surfacing methods are adopted for conducting surfacing repairing on the internal defects of the casting, the quality of aluminum alloy casting products is guaranteed, and the rejection rate and the production cost are reduced.

The invention discloses a flux-cored wire for extra-thick marine steel high heat input EGW and a preparation method of the flux-cored wire, and relates to the technical field of metal welding, the flux-cored wire comprises an outer skin of a double-layer alloy steel strip and powder filled in the outer skin, the filling rate of the powder is 20 + / -5%, and the powder comprises Fe, Mn, Si, Cr, Ni, Mo, V, B, S, Al, MgAl2O4, MgO-TiO2, ReOx and a slag former. According to the preparation method, the metal powder is positively charged, the rare earth nanoparticles are negatively charged through an electrostatic self-assembly technology, the metal powder and the rare earth nanoparticles are mixed with a slag former after being mixed, filtered and freeze-dried, an alloy steel strip is filled with the powder, and then rolling and drawing forming is conducted. In the welding process, the composite inclusions form a core-shell structure, a weld metal structure is regulated and controlled, acicular ferrite nucleation is promoted, and grains are refined, so that the low-temperature toughness and crack arrest performance of a weld are remarkably improved, the rare earth elements are beneficial for changing irregular inclusions into spheres, nucleation sites are increased, interface energy is reduced, and the nucleation rate of acicular ferrite is increased.

This invention discloses a stainless steel welding wire for repair welding of martensitic stainless steel turbine runners, its preparation method, and its application, belonging to the field of metal welding material preparation technology. The chemical composition of the welding wire provided by this invention, expressed as a percentage by weight, is: C≤0.03%, Si: 0%~0.6%, Mn: 5.0%~8.0%, S≤0.010%, P≤0.020%, Cr: 12.5%~15.5%, Ni: 5.0%~7.0%, Mo: 1.0%~2.0%, with the balance being Fe and impurities. The welding wire provided by this invention is suitable for repair welding of Cr13Ni4~6 type martensitic stainless steel, and post-weld heat treatment is not required. The weld metal produced by this welding wire exhibits good strength, plasticity, and toughness, with a tensile strength ≥750MPa, elongation after fracture ≥35%, and impact absorption energy at -40℃ ≥120J.

The invention relates to the technical field of glass welding, in particular to a clamping device for metal-glass laser welding and a welding method. The device comprises a bottom plate, a cover frame and supporting columns connecting the bottom plate and the cover frame, and a lifting part is formed between the cover frame and the bottom plate. A mechanical lifting assembly with an adjusting rocker and a graduated scale is installed on the bottom plate in the lifting part, the lower end is connected with the bottom plate, and the upper end is connected with the machining table to drive the machining table to ascend and descend. And the center of the cover frame is provided with a quartz glass pressing plate plated with a magnesium fluoride antireflection film. A cylindrical metal mounting base coaxial with the glass pressing plate is arranged on the machining table and used for mounting metal to be welded. During welding, the adjusting rocker is rocked to lift the machining table so that to-be-welded glass can make contact with the glass pressing plate, and optical contact is achieved by observing the situation that an interface Newton ring disappears from appearing; the whole clamping device is moved to a laser machining platform, and welding is conducted through a glass pressing plate; and after completion, the machining table is lowered to disassemble the weldment.

The invention discloses a method for predicting the phase content and the hardness of a titanium alloy welding joint, which comprises the following steps of: 1, constructing a welding temperature field model, and correcting a Gaussian cylinder heat source model in welding simulation by comparing the morphology of a welding joint molten pool; 2, a solid-state phase change model is introduced, and a weld metal phase change model is constructed; and step 3, inputting the solid-state phase change model obtained in the step 2.4 into the three-dimensional solid model to obtain the phase content of the welding joint as a field variable in an output hardness field, and predicting the hardness of the joint through the phase content of the welding joint. According to the method, by introducing a solid-state phase change model and optimizing heat source parameters, high-precision prediction of the phase content and hardness of the welding joint is achieved, and rapid optimization of process parameters is guided.

The utility model discloses a main-grid-free back contact battery string and a photovoltaic assembly, the main-grid-free back contact battery string comprises a plurality of back contact battery pieces arranged along a first direction, and the back surface of each back contact battery piece is provided with first fine grids and second fine grids which are alternately arranged along the first direction; the first welding strips and the second welding strips are alternately arranged in the second direction; wherein for the same back contact battery piece, the first welding strip is electrically connected with the first fine grid, and is insulated from the second fine grid; the second welding strip is insulated from the first fine grid and is electrically connected with the second fine grid; welding layers are arranged at the contact positions of the first fine grid and the first welding strip and the contact positions of the second fine grid and the second welding strip; the welding layer comprises a welding metal layer and a bonding glue layer, and the bonding glue layer covers the welding metal layer. According to the utility model, the welding quality of the welding strip can be improved, and the connection stability and reliability of the welding strip and the fine grid are ensured.

The invention provides a welding method for a floating ship plate of a large oil storage tank, which belongs to the technical field of electric digital data processing and comprises the following steps: firstly, acquiring three-dimensional point cloud data through a sensor group on a crawler-type welding robot, and acquiring a feature image of a to-be-welded area by using a camera; a welding coordinate system is established based on the data, a groove contour is calculated, and an initial welding track is generated. And in combination with welding process parameters and environmental conditions, an Euler angle sequential sequence calculation equation set is established, and the posture of a welding head is adjusted in real time. Groove forming data in the welding process are monitored in real time through a sensor, when the fusion depth or the excess weld metal of a connector does not meet the requirement, a system can automatically recalculate the Euler angle sequence and adjust welding parameters till the technological standard is met, and therefore high-quality automatic welding is achieved, and the welding efficiency is improved. The technical problem that in the prior art, welding parameters and the motion trail of the welding robot are difficult to automatically adjust according to the welding state sensed in real time in the welding process is solved.

The invention discloses an austenitic stainless steel welding wire for a liquid hydrogen storage tank and a preparation method and application of the austenitic stainless steel welding wire, and belongs to the technical field of welding materials and preparation of the welding materials. The welding wire solves the problem that the low-temperature performance of a welding seam is poor when the current welding wire for the liquid hydrogen storage tank is used for welding. The welding wire comprises the following chemical components in percentage by mass: less than or equal to 0.02% of C, 0.4-1.5% of Si, 5.0-7.5% of Mn, less than or equal to 0.020% of S, less than or equal to 0.030% of P, 16.0-22.0% of Cr, 15.0-18.0% of Ni, 2.0-5.0% of Mo, 0.05-0.2% of N, less than or equal to 0.01% of O and the balance of Fe and inevitable impurities. According to the welding wire, deposited metal is low in low-temperature embrittlement tendency, high in low-temperature strength and excellent in low-temperature impact and fracture toughness. The welding wire is used for welding the austenitic stainless steel liquid hydrogen storage tank and is wide in application range, and the mechanical property of deposited metal is good.

The invention provides a pipeline all-position laser rotating electric arc composite automatic welding device and method. The device comprises a flexible guide rail, a welding trolley, a rotating electric arc welding gun module, a laser module, a sensor module and a controller. The flexible guide rail is annularly arranged and tightly attached to the pipeline and provides a moving path for the welding trolley. The welding vehicle is movably arranged on the flexible guide rail; the rotary arc welding gun module, the laser module and the sensor module are sequentially and adjustably arranged at the front end of the welding vehicle in the circumferential direction of the pipeline; the welding trolley, the rotary arc welding gun module, the laser module and the sensor module are electrically connected with the controller. Two heat sources of laser and rotating arc synergistically act on the same molten pool, the molten pool is deepened by the laser, the melting width is widened by the rotating arc, a large weld depth-to-width ratio is jointly molded, and the distribution uniformity of weld alloy elements is improved through the quenching and tempering treatment of the laser on weld metal and the stirring effect of the molten pool of the rotating arc. And the welding speed and the welding quality are greatly improved.

The invention provides an ultra-low carbon duplex stainless steel all-position welding flux-cored wire and a welding method thereof.The outer skin of the flux-cored wire is a stainless steel strip, the flux-cored wire is filled with powder, and the powder comprises, by mass, 18-25% of natural rutile, 20-30% of stainless steel powder, 20-30% of stainless steel powder, 20-30% of stainless steel powder and the balance stainless steel powder. 3-5% of sodium titanate; 5-10% of quartz sand; 0.5 to 4 percent of zircon sand; 1-3% of sodium fluoride; 15 to 25 percent of ferromolybdenum; 3-6% of nitrided ferrochrome; 2-4% of electrolytic manganese; 5-8% of nickel powder; 27 to 32 percent of metal chromium; 0.5-2% of magnesium powder; 0.5 to 1.5 percent of bismuth oxide; and 1-4% of silicon iron. The flux-cored wire is used for all-position welding of third-generation duplex stainless steel, welding spatter is small, and weld joint forming is good; the carbon content of a weld joint is extremely low, and through component and welding process control, weld joint metal has strength, plasticity, toughness and corrosion resistance equivalent to those of base metal. And the double requirements of high strength and toughness and high corrosion resistance in the manufacturing fields of submarine pipeline laying, shipbuilding, marine gas field exploitation and the like are ensured.

The invention provides a coal mine hydraulic support gas shield welding wire with the strength higher than 900 MPa and a preparation method of the coal mine hydraulic support gas shield welding wire. The gas shield welding wire comprises, by mass, 0.03%-0.06% of C, 0.51%-0.70% of Si, 1.35%-1.64% of Mn, smaller than or equal to 0.010% of P, smaller than or equal to 0.005% of S, 0.20%-0.38% of Cr, 2.35%-2.65% of Ni, 0%-0.09% of Cu, 0.45%-0.70% of Mo, 0.015%-0.030% of Ti, 0.025%-0.035% of Nb, 0.002%-0.006% of Ce, 0.0005%-0.0012% of B, smaller than or equal to 0.004% of O, smaller than or equal to 0.006% of N and the balance Fe and The invention has the following beneficial effects: (1) through reasonable design of chemical components, the yield strength of weld metal is greater than or equal to 820 MPa, the tensile strength is greater than or equal to 900 MPa, the ductility is greater than or equal to 21%, and the low-temperature impact toughness at-40 DEG C is greater than or equal to 75 J; (2) inclusions in a weld joint are dispersed and refined after the welding wire is welded, refined acicular ferrite instead of bainite and martensite is taken as a main structure, and the strength and toughness of the weld joint are excellent; and (3) the composition proportion of the welding wire is optimized, a stable welding wire preparation process is developed according to the components, and the comprehensive performance of the high-strength coal mine hydraulic support welding seam is considered.

The invention belongs to the technical field of metal door and window machining, particularly relates to positioning welding equipment and method for metal door and window machining, and aims to solve the problems that the welding efficiency and effect of a metal door frame are reduced due to tedious manual fixing and positioning operation during welding of the metal door and window. A positioning welding module is arranged above the tool supporting bottom plate and comprises two tool supporting plates, first round holes are formed in the side faces of the two tool supporting plates correspondingly, and overturning cylinders are connected to the interiors of the two first round holes through bearings correspondingly. According to the positioning and welding equipment and method for metal door and window machining, the situation that a person manually fixes and positions door and window frames is avoided, meanwhile, the door and window frames of different sizes are fixed and positioned, the two sides of the door and window frames are welded, and therefore the welding efficiency and effect of the metal door and window are improved.

The invention relates to the technical field of welding monitoring, and discloses an online monitoring method for the welding quality of a joint of an ultrasonic welding metal sheet, which comprises the following steps: S1, detecting the friction coefficient of a welding interface of the metal sheet in real time through a friction coefficient detection unit; s3, dividing the real-time friction coefficient detected in the step S1 into three stages, namely a pre-welding stage, a welding process stage and a post-welding cooling stage according to the welding process, and S4, performing statistical analysis on the real-time friction coefficient of each stage in the step S3 by adopting an average value and an extreme value, and during calculation, at least obtaining the real-time friction coefficient of each stage during five times of welding. The method has the following advantages and effects that by dynamically monitoring the friction coefficient of the interface of the ultrasonic welding metal sheet in real time, detecting the quality of a welding joint in real time and optimizing welding process parameters in time, the percent of pass of products can be greatly increased, and the operability and accuracy of quality control are remarkably improved.

Provided are a gas-shielded metal arc welded joint of high-Mn steel, which is simple, has high strength and excellent extremely low-temperature toughness, and a method for producing the same. A gas-shielded metal arc-welded joint in which a welding metal is formed from a steel material of a high-Mn-content austenitic steel containing, in mass%, 18.0-30.0% of Mn using a shielding gas and a solid welding wire, the welding metal having a chemical composition containing, in mass%, 0.15-0.80% of C, 0.10-1.00% of Si, 17.0-30.0% of Mn, 0.030% or less of P, 0.030% or less of S, 0.001-0.100% of Al, 0.4-5.5% of Cr, 0.01-3.50% of Mo, 0.01-10.00% of Ni, and 0.0200-0.1500% of N, with the remainder being Fe and unavoidable impurities. Methods of making a gas shielded metal arc welded joint by incorporating a given concentration of nitrogen in a shielding gas, or increasing the N content of a solid wire.

The invention discloses a heat-treatment-free control method for inhibiting hydrogen-induced cracks in ultrahigh-strength steel welding, which belongs to the technical field of welding, and enables weld metal to obtain a low-phase-transition-temperature characteristic and a double-phase structure containing retained austenite under a specific dilution rate window by cooperatively regulating and controlling components of a welding material and welding process parameters. Therefore, preheating-free and post-heat-treatment-free efficient welding of the ultrahigh-strength steel is achieved. According to the method, the volume expansion effect generated by low-temperature martensite phase transformation of weld metal is utilized to actively counteract restrained tensile stress formed by welding cooling shrinkage; on the other hand, the effect of the retained austenite serving as an efficient'hydrogen trap 'is fully played, migration and enrichment of hydrogen to crack sensitive areas such as a heat affected zone or a fusion line are effectively blocked, and finally effective inhibition of hydrogen-induced cracks in ultrahigh-strength steel welding is achieved; the obtained welding joint is free of hydrogen-induced cracks and has the mechanical property level well matched with base metal.

To strongly join thin metal foils while making those end faces abutted on each other.SOLUTION: A metal foil welding method laser welds a first metal foil and a second metal foil having different compositions while making those end faces abutted on each other, wherein thicknesses of the first metal foil and the second metal foil are 0.1 mm or more and 0.5 mm or less, and the method welds the metal foils along the end faces while repeatedly scanning an irradiation position of a laser beam in a direction crossing the abutted end faces.SELECTED DRAWING: Figure 1

The utility model discloses an ultrasonic wire feeding additive manufacturing device which comprises a base plate, a tungsten electrode welding gun, a wire feeder and an ultrasonic vibration system. The tungsten electrode welding gun, the wire feeder and the ultrasonic vibration system are jointly connected with a positioning rod, and the positioning rod is movably arranged above the base plate. The ultrasonic vibration system is located on one side of the wire feeder and used for generating high-frequency vibration signals and transferring the generated high-frequency signals to a welding metal wire. According to the ultrasonic wire feeding additive manufacturing device, ultrasonic vibration is applied to the welding metal wire, so that a high-frequency vibration signal is transmitted into the molten pool through the welding metal wire, cavitation is generated in the molten pool, beta columnar crystals generated in the solidification process can be effectively broken, and the production efficiency is improved. And the anisotropy problem of the internal structure and the mechanical property in the wire feeding direction and the stacking direction is solved, that is, the performance of an additive manufacturing part is improved.

The invention relates to the technical field of ferrous metallurgy, in particular to a high-strength extremely-low-temperature welding material wire rod and a manufacturing method and application thereof.The manufacturing method comprises the steps that molten steel smelting is conducted according to chemical components and percentages of the high-strength extremely-low-temperature welding material wire rod, a square billet is manufactured in a forging and rolling mode after die casting, the square billet is heated and subjected to heat preservation for 4.5-6 h, and then the square billet is rolled into a first-diameter wire rod; cooling after rolling, uncoiling a wire rod, reducing the diameter from a first diameter to a second diameter through three times of drawing, annealing, reducing the diameter from the second diameter to a third diameter through three times of drawing after annealing, and finally performing finish drawing to a fourth diameter. The high-manganese steel liquid hydrogen storage tank welding material can be used for producing the high-manganese steel liquid hydrogen storage tank welding material, is matched with high-manganese steel welding and is good in forming, the content of Mn in formed weld metal is 24-28 wt%, the situation that due to large-range diffusion of the manganese element, the structure and performance near a fusion line are greatly different is avoided, and the extremely-low-temperature service mechanical performance of the weld metal is guaranteed.

The invention discloses a welding device and a welding method for a saddle-shaped welding seam of a connecting pipe and a barrel, and the welding device for the saddle-shaped welding seam of the connecting pipe and the barrel comprises a welding machine base, a welding rod, a welding rod and a driving device, the rotating mechanism is arranged on the welding machine base, and the rotating center shaft of the rotating mechanism is coaxial with the center line of the connecting pipe; the controller is arranged on the rotating mechanism; the cross beams are arranged on the two sides of the controller; the welding parts are symmetrically arranged on the cross beam by taking the center line of the connecting pipe as the axis; and the controller adjusts the height between the welding part and the saddle-shaped welding seam in the welding process according to electric arc voltage feedback during uphill and downhill welding in the welding process. By means of the method, whole-circle symmetrical welding on the saddle type welding seam can be achieved, the width of the welding seam can be reduced to 18 mm or less, the welding seam deposited metal filling amount is greatly reduced, welding deformation is reduced, and the welding quality is improved.

The invention relates to the technical field of storage and transportation pipelines, in particular to a Zr microalloying welding wire for a submerged arc welding steel pipe of a hydrogen transportation pipeline. The Zr microalloying welding wire for the submerged arc welding steel pipe of the hydrogen transmission pipeline comprises the following chemical components in percentage by mass: 0.06 to 0.10 percent of C, less than or equal to 0.30 percent of Si, 0.80 to 1.20 percent of Mn, less than or equal to 0.02 percent of P, less than or equal to 0.01 percent of S, 0.10 to 0.20 percent of Cr, 0.15 to 0.30 percent of Ni, 0.10 to 0.30 percent of Mo, less than or equal to 0.25 percent of Cu, 0.02 to 0.10 percent of Ti, 0.06 to 0.12 percent of Zr and the balance of Fe and inevitable impurities. The Zr microalloying welding wire for the submerged-arc welding steel pipe of the hydrogen transmission pipeline is matched with a low-hydrogen fluorine alkaline flux, and is suitable for double-sided multi-wire submerged-arc welding of the hydrogen transmission pipeline steel pipe with the steel grade of X60 / L415 or below, and after welding, the yield strength of weld metal is 450-550 MPa, the tensile strength is 550-650 MPa, the hardness is smaller than 220 HV10, and the low-temperature impact energy at the temperature of-20 DEG C is larger than 80 J.

An electric resistance welded pipe or tube comprises a weld portion in a pipe or tube longitudinal direction, wherein a maximum value of a wall thickness distribution of the weld portion is less than or equal to 1.05 times an average wall thickness of the electric resistance welded pipe or tube, a width of a weld metal in the weld portion in a circumferential direction is 1 μm or more and 800 μm or less over an entire thickness of the electric resistance welded pipe or tube, and a ratio of a maximum value to a minimum value (=maximum value / minimum value) of the width of the weld metal is 1.0 or more and 2.5 or less.

To provide a welded joint which has excellent low-temperature toughness, is suppressed in stress corrosion cracking caused by liquefied ammonia, and has 490 MPa or more of tensile strength, and a method for manufacturing the welded joint.SOLUTION: A welded joint has a base metal, a weld metal, and a welding heat affected zone. In the welded joint, each of the base metal and the weld metal has a chemical composition of a specific range, the area fraction of bainite structure from 1 / 4 thickness to 3 / 4 thickness in the sheet thickness direction from the surface of the base metal is 90% or more, Vickers hardness at the 1 mm position in the sheet thickness direction from the surface of the base metal is 210 or less, Vickers hardness in the welding heat affected zone is 210 or less, Vickers hardness in the weld metal is HVW or less (HVW=260-200×Ni), the tensile strength of the base metal and the welded joint is 490 MPa or more, and the absorption energy of the base metal and the weld metal in Charpy impact test is 47 J or more at -40°C.SELECTED DRAWING: None

The invention relates to the technical field of welding, in particular to an ocean wind power single pile foundation super-thick plate welding method which comprises the steps that X-shaped groove plates are adopted for plate assembly, and the groove angle, the assembly gap and the truncated edge of each plate meet the assembly technical requirements; the plate is subjected to backing welding through a flux-cored wire, and the welding method is semi-automatic gas shielded welding; the plate is filled with solid submerged arc welding wires and subjected to cosmetic welding, and the welding method is double-wire submerged arc welding. Appropriate plates are selected for assembly so as to reduce gaps generated during assembly of the plates and meet technical requirements, deviation of backing welding is reduced through gas shielded welding, then double-wire submerged arc welding is used for filling and cosmetic welding, and meanwhile the problems that weld metal of the double-wire submerged arc welding is low in impact toughness and low in welding quality are solved by setting appropriate welding parameters. The problems that the welding efficiency of an original single wire is low, and the welding material waste is high are solved, and the production cost in the welding work is reduced.

The application relates to the technical field of medical instrument processing, in particular to a cutting and welding device for medical instrument metal piece processing, which comprises a processing table, a welding main body and a cutting main body, wherein the welding main body and the cutting main body are both installed on the processing table; the welding main body is used for welding metal pieces; the cutting main body is used for cutting metal pieces; a switching mechanism is arranged on the processing table and is used for switching the welding main body and the cutting main body. The cutting and welding process is completed through reciprocating motion, the transfer process can be effectively reduced, manual operation can be reduced, and the working efficiency is improved; the welding process and the cutting process are switched during the conveying of the metal pieces, the time spent on manual process conversion can be effectively reduced, and the processing efficiency can be effectively improved.

The invention relates to the technical field of welding equipment, in particular to multi-angle-acting metal product welding equipment which comprises a bottom plate, a walking structure, a welding structure, an adjusting structure, a clamping structure and a fixing structure. The metal pipes with different diameters and lengths are clamped through the clamping structure, the welding device is suitable for welding work that two metal main pipes are welded into one metal main pipe, the welding stability of the metal main pipes is improved, and the feeding difficulty of the metal main pipes is reduced; the metal main pipes with different lengths and diameters are fixed through the adjusting structures, metal branch pipes are conveniently welded to the metal main pipes, meanwhile, the angles of the metal main pipes are conveniently adjusted, and the welding difficulty is reduced; the walking structure and the welding structure facilitate adjustment of the welding angle and the welding position, multi-angle welding of the metal branch pipe is facilitated, and the welding effect is improved; the fixing structure facilitates feeding of the metal branch pipes, the metal branch pipes can be conveniently transferred to the welding position, the stability of the branch pipes during welding is improved, meanwhile, the spot welding step is omitted, and the welding efficiency is improved.

Provided are: a carbon dioxide gas shielded arc welding wire capable of improving detachability of slag adhered to a bead surface after welding, while maintaining toughness of a weld metal; and a welding method using the welding wire. This welding wire is for use in carbon dioxide gas shielded arc welding performed with positive polarity, and has a chemical composition containing, in mass%, 0.200% or less of C, 0.05-2.50% of Si, 0.25-3.50% of Mn, 0.050% or less of P, 0.050% or less of S, 0.02-3.00% of Al, 0.0100% or less of O (oxygen), 0.0050% or less of Ca, and 0.010-0.100% of REM. In the REM, Nd is contained in an amount of 0.0015-0.0200%, and the remaining portion is Fe and unavoidable impurities. This carbon dioxide gas shielded arc welding method uses the welding wire and involves performing welding with a positive polarity by using, as a shield gas, a gas having a CO2 concentration of 60 vol% or more.

The present invention discloses a welding device for welding a metal basket. The metal basket includes an L-shaped metal bar, a metal hoop, and a bottom ring. The metal bar includes a first bend and a second bend. The welding device comprises: a horizontal moving mechanism; a fixing device disposed on the horizontal moving mechanism, the fixing device being used to fix the metal bar and the metal hoop and capable of twisting the second bend; a first welding mechanism disposed at one end of the horizontal moving mechanism in the conveying direction and used to weld the first bend to the bottom ring; and a second welding mechanism disposed on both sides of the horizontal moving mechanism in the conveying direction and used to weld the second bend to the metal hoop. The welding device proposed by the present invention can automatically weld metal baskets, reducing labor costs.