6425 results about "Weld bead" patented technology

Implantable medical devices (IMDs) and components, including flat electrolytic capacitors and methods of making and using same, particularly an improved electrolytic capacitor fabricated of an electrode stack assembly comprising a plurality of capacitor layers stacked in registration upon one another. Each capacitor layer comprises a valve metal cathode layer having a cathode tab, a valve metal anode layer having an anode tab, and a separator layer located between the cathode layers. The anode layer is assembled from a plurality of valve metal anode sheets that are etched and anodized, stacked side-by-side, and electrically and mechanically joined together by laser weld beads. A valve metal anode tab having a thickness equal to one or more anode sheet is inserted into a tab notch in one or more stacked anode sheet and joined to the anode sheet stack by laser welding the tab and sheet edges together.

The invention discloses a narrow gap welding monitoring and welding line deviation detecting method based on infrared vision sensing and belongs to the technical field of welding. An infrared vision sensing system comprises an infrared complementary metal oxide semiconductor (CMOS) camera, a filtering system, an image collecting card, a computer, a display and the like. Narrow gap welding arc light and molten pool radiation light are used as a light source, an infrared narrow belt filtering system is used for filtering interference signals and adjusting light intensity, and the computer collects and displays a welding image obtained through the infrared CMOS camera. An image capturing window is used for capturing an image away from an arc side, the image is processed, welding line deviation information is obtained by extracting a groove single-side edge, and a real-time property of welding line deviation detecting is improved while arc noise is effectively avoided. The system is simple in formation, clear in monitored image, high in welding line deviation detecting precision, strong in anti-interference capacity and good in engineering practicality and can achieve the purposes of real-time monitoring of narrow gap welding and synchronous detecting of welding line deviation.

A method of welding a gas turbine engine substrate composed of a gamma prime precipitation strengthened nickel based superalloy, including the steps of: applying weld beads on the substrate to form a continuous layer the thickness of the weld beads; using a filler material made of a first material exhibiting comparable strength and ductility as the substrate, and a second material exhibiting greater ductility than the substrate; and creating crack propagation mitigating regions within the continuous layer by increasing the percentage of the second material in the crack propagation mitigating regions over the percentage of the second material in the remainder of the continuous layer.

A method and apparatus of comparing two or more welding flux systems to determine which flux system results in the smallest incidence of undercut about a weld bead in an inner diameter of a pipe.

The invention discloses a scanning type laser vision sensing-based narrow-gap deep-groove automatic laser multilayer welding method for a thick plate, relates to a welding method, and aims to solve the problems that the conventional structured light vision sensing-based welding method can only be used for a simple shallow-groove laser weld seam tracking task and that when the conventional structured light vision sensing-based welding method is used for the narrow-gap deep-groove weld seam welding of the thick plate, a covering phenomenon is easily produced, the groove identification accuracy is lower, only real-time weld seam alignment calibration can be realized and narrow-gap deep-groove laser multilayer welding bead planning and welding cannot be realized. The method specifically comprises the following steps of: 1, selecting a groove form; 2, scanning a groove section image of a thick plate workpiece to be welded by using an image scanning unit; 3, processing the acquired groove section image by using an image algorithm to obtain weld seam image data; 4, performing fitting calculation; and 5, finishing the welding of welding beads layer by layer. The method is used for the deep-groove weld seam welding of the thick plate.

A welding power supply includes a user interface that allows the operator to adjust one or more welding parameters comprising a welding sequence for a welding process. The user interface may include a display, which may be a graphical display depicting the welding sequence and the one or more welding parameters. The user interface may further dynamically depict a pictograph, icon or other graphical image showing how changes to the one or more welding parameters will affect the welding process, which in an exemplary manner may be the welding bead profile and/or the welding arc profile.

An apparatus 1 of the present invention includes a laser emitting unit 2, a monitor unit 3, a storage unit 4, an image extraction unit 5, a bead recognition unit 6, and a bead shape determination unit 7. The bead shape determination unit 7 is configured to calculate the position of the end of a bead region based on the bead region recognized by the bead recognition unit 6, and to determine whether the shape of the end of the bead region is convex or concave in the extending direction of the bead region.

The invention discloses a swing arc-based multi-layer and multi-channel weld tracking system and an identification method thereof. The weld tracking system comprises a welding gun, a welding power supply, a wire feeder, a welding tractor, a swinger, a driver, a hall current sensor, a main carriage and the like, wherein the welding gun is used for performing oscillatory scanning on a weld groove when driven by the swinger in the welding process, the change of relative positions between the welding gun and a workpiece directly causes the change of arc length, and the change of the arc length causes the change of arc parameters such as arc current, arc voltage and the like; the hall current sensor is used for sending detected welding current signals and positioning pulse signals to the controller, automatically judging the weld shape according to certain operation rules, processing the weld shape by selecting corresponding weld deviation signal extraction schemes and acquiring weld deviation information; and the swinger is used for regulating weld deviation, automatically tracking welds and completing automatic welding.

The invention provides a manufacturing method of an arc additive of a titanium alloy structural part. An arc wire feed additive manufacturing method is used to carry out welding of each layer of ring members, i.e., a wire feeder feeds welding wires, the welding wires are melted by a welding gun to weld, and ring welding beads from the inside to the outside are sequentially lapped to form a layer of ring members; and then one thickness of layer of the welding gun is increased, and the welding method is repeated to form another layer of ring members, and so forth; and finally, a plurality of layers of ring members are overlapped to form a titanium alloy structural part. The welding forming part provided by the invention has a fine and uniform grain size and good mechanical properties, and can meet or exceed the level of congruent castings, and the product has a short development cycle and high processing efficiency.

If a short circuit does not occur during deceleration of a wire feed speed in forward feed of a welding wire before the wire feed speed reaches a predetermined wire feed speed, a cyclic change is stopped and the wire feed speed is constantly controlled at the first feed speed. If a short circuit occurs during forward feed at the first feed speed, deceleration from the first feed speed starts, and the cyclic change is resumed for welding. This achieves uniform weld bead without increasing spatters even if any external disturbance such as change of distance between a tip and base material occurs.

A self shielding cored electrode used to form weld beads having high Charpy V-Notch toughness. The cored electrode includes a metal sheath and fill composition. The fill composition includes a slag system having a gas generating compound, magnesium and at least three metals selected from the group consisting of aluminum, cerium, titanium and zirconium.

The invention discloses a laser-vision sensing assisted remote teaching method for remote welding, relating to a remote teaching method for remote welding. The purpose of the invention is to solve the problems of difficult-completed remote teaching of complex weld bead in remote welding and long time consumption of position and attitude adjustment of a welding gun in teaching. The method comprises the following steps: 1. initializing a system; 2. setting a weld joint type; 3. automatically obtaining weld bead feature points; 4. calculating to obtain weld bead teaching points Ti = Ps + Rr; 5. recording and forming a teaching point sequence; 6. judging whether the teaching points are enough; 7. downloading a remote teaching program; 8. and finishing teaching. The method is used for remote welding.

The invention relates to a nickel-based welding electrode which comprises the following component by weight percent (wt%): 50.0-68.0% of Ni, 18.0-23.0% of Cr, 6.0-11.0% of Mo, 3.0-6.0% of Nb, 2.50-9.00% of Fe, 0.01-0.1% of C, 0.10-1.00% of Mn, 0.010-0.10% of Si, 0.015% of S or less, 0.015% of P or less, 0.01-0.10% of Cu, 0.003-0.010% of Co and the balance of impurities. The coat of the nickel-based welding electrode comprises the following components by weight percent of the welding core: 12-18% of marble, 10-15% of fluorite, 12-18% of barium carbonate, 5.0-6.4% of rutile, 3.5-5.0% of ferroniobium, 3.3-4.5 of chromium metal powder, 0.45-0.65% of sodium carbonate, 0.45-0.65% of electrolytic manganese and 1.3-1.8% of zircon sand, and the adhesion agent is 10-20% of the total weight of the power. The nickel-based welding electrode is prepared by mixing, wrapping mixture on the welding core and baking at low and high temperature. The nickel-based welding electrode disclosed by the invention is used for nickel-chromium-molybdenum alloy steel welding, ensures that the excellent mechanical properties, the excellent corrosion resistance, the excellent thermal crack resistance and the hightensile strength of the welding seam match with those of the base material, has good welding process performance, guarantees attractive molding and can be used for the welding of the steel (with 9% of Ni) working at low temperature.

A flux-cored nickel-based alloy wire contains, based on the total mass of the wire, 3 to 11 percent by mass of TiO₂, 0.2 to 1.3 percent by mass of SiO₂, 1 to 3 percent by mass of ZrO₂, and 0.3 to 1.0 percent by mass of manganese oxides in terms of MnO₂, contains of a total of 0.2 to 1.0 percent by mass in terms of Na, K and Li of sodium compounds, potassium compounds, and lithium compounds. The flux has a ratio (([TiO₂]+[ZrO₂])/[SiO₂]) of the total of the TiO₂ and ZrO₂ contents to the SiO₂ content of 5.0 to 14.5, in which [TiO₂], [SiO₂] and [ZrO₂] represent TiO₂, SiO₂ and ZrO₂ contents. The wire shows excellent weldability in welding of all positions typically on 9% nickel steels and nickel-based alloy steels and gives a weld metal having good pitting resistance, bead appearance, and resistance to hot cracking.

To provide a flux-cored welding wire and a method for arc overlay welding attaining excellent weldability and low dilution ratio and obtaining a weld bead excellent in corrosion resistance in overlay welding using the flux-cored welding wire having an advantage of high deposition rate and deposition efficiency. The flux-cored welding wire for gas shielded arc welding including flux filled up in an outer sheath and using pure Ar as a shielding gas contains, as percentage to the total mass of the flux-cored welding wire, C: 0.20 mass % or below, Si: 15.00 mass % or below, Mn: 20.00 mass % or below, P: 0.0500 mass % or below, S: 0.0500 mass % or below, and Cr: 15.0-50.0 mass %, with the remainder being Fe and inevitable impurities.

Methods for welding a particle-matrix composite body to another body and repairing particle-matrix composite bodies are disclosed. Additionally, earth-boring tools having a joint that includes an overlapping root portion and a weld groove having a face portion with a first bevel portion and a second bevel portion are disclosed. In some embodiments, a particle-matrix bit body of an earth-boring tool may be repaired by removing a damaged portion, heating the particle-matrix composite bit body, and forming a built-up metallic structure thereon. In other embodiments, a particle-matrix composite body may be welded to a metallic body by forming a joint, heating the particle-matrix composite body, melting a metallic filler material forming a weld bead and cooling the welded particle-matrix composite body, metallic filler material and metallic body at a controlled rate.

The invention discloses a laser and MIG (metal-inert gas) arc composited welding method for high-nitrogen steel. The laser and MIG arc composited welding method is characterized by comprising the following steps of: design of a welding joint; design of a welding mode; setting of a composite way and heat source spaces; selection of protective gas for the composite welding; setting of welding technology parameters according to the composite way; and synchronous implementation of the composite welding. Compared with the prior art, the laser and MIG arc composited welding method has the advantages of being capable of implementing the welding of the high-nitrogen steel with middle thickness and achieving weld joints which have clean and smooth surfaces and are good in forming and free from sunken parts; and meanwhile, the welding method has the characteristics of low loss and uniform distribution of nitrogen elements at connectors, high welding penetration, high welding speed, small deformation of workpieces, low assembly requirements and the like.

A cored electrode to form a weld bead with little or no gas tracking. The cored electrode includes a metal sheath and a fill composition. The filling composition includes a slag forming agent and at least one fluorine containing compound.

An apparatus for monitoring a laser welding bead irradiates a laser to a surface of a welding bead when welding with a laser welding machine, collects a signal reflected from the surface of the welding bead as an image signal, and then extracts at least one feature variable of a bead shape using the collected image signal. Then, the apparatus for monitoring the laser welding bead determines welding defects using the at least one feature variable, and controls an operation of the laser welding machine according to whether or not the welding defects are generated.

The invention discloses a high-entropy alloy solder used for welding copper and aluminum, which comprises the components according to the atomic percent with the total percentage being 100%: 6-14% of Ti, 10-20% of Al, 10-20% of Fe, 15-25% of Cu, 10-18% of Ni, 6-14% of Co, 0.5-4.5% of Sn and 0.03-3.5% of addition element, wherein, the addition element is one selected from Bi, Ga, In or RE. The invention also discloses a preparation method of the high-entropy alloy solder foil, which adopts stepwise smelting technique and a single-roller rapid solidification device to prepare the high-entropy alloy solder foil. The high-entropy alloy solder has good flexibility and is convenient for processing and assembly; when in welding, the high-entropy alloy solder has good metallic matching property with Al and Cu; the soldering seam is good in corrosion-resistant performance, the welding seam is single-phase fcc solid solution tissue, no friable intermetallic compound is generated, and the comprehensive mechanical property of joints can be remarkably improved; the preparation method of the high-entropy alloy solder has simple technique and low manufacturing cost.

A turbomachine blade includes a metal alloy airfoil having a cavity closed off by a cover on a hollowed side, the cover providing aerodynamic continuity of the hollowed side and being bonded via an edge thereof to the rest of the airfoil by a weld bead. The weld bead emerges on the hollowed side and penetrates into the airfoil to a depth P at least equal to the thickness EC of the edge of the cover so as to provide continuity of material between the edge of the cover and the rest of the airfoil over a depth at least equal to the thickness EC of the edge of the cover. A process for manufacturing such a blade is also disclosed.