60results about How to "Save welding consumables" patented technology

An automatic pulse argon arc welding technology for the butt connection between different two tubes by using Ni-base alloy as isolating layer includes such steps as build-up welding at least three layers of stainless steel in low-alloy steel tube, build-up welding an isolating Ni-base alloy layer, machining the bevels of isolating Ni-base alloy layer and stainless steel tube, butt locating, and TIG welding.

The invention relates to a floor pull-in method in shipbuilding, which includes the following steps: the shape of a floor and a through hole of the floor are cut according to the accuracy requirements of ships; a longitudinal frame is manufactured according to the accuracy requirements; inner hulls are pieced together by welding and the longitudinal frame is installed by welding; a first floor is pulled in the inner hull and is welded to form an inner hull component; the inner hull component is measured and the first floor is rigidly reinforced; a hoisting ring is arranged on the inner hull component; an outside plate component is made and fixed on a moulding bed, a hoisting apparatus is used for hauling the hoisting ring to overturn the inner hull component and to cause the upper through hole of the floor to be aligned with a longitudinal frame terminal of the outside plate component, and then a second floor of the inner hull component is pulled in; a welding technique is determined, and the inner hull component and the outside plate component are welded to form whole ship sections. On the basis of a single floor pull-in method, the method can further improve the pull-in accuracy of floors, thus greatly reducing the quantity of patches required in shipbuilding in sections and improving the production efficiency of building in sections.

The present invention relates to a shell-and-tube heat exchanger and hemispherical head one-side weld narrow gap welding process. It is characterized by that its backing weld adopts pen-type manual argon shielded are welding process, its welding material adopts mushroom-type consumable backing ring; the transion weld adopts electrode electric arc welding process, adopts spray coating spatter-proof material; and its main weld adopts narrow gap submerged-arc automatic welding process.

The invention provides a process for production of a double-metal metallurgical composite tube through a high frequency resistance welding method and the composite tube. The process comprises the steps that firstly, a metallurgical composite steel tube with an inner corrosion-resistant alloy lining and an outer base tube is formed; secondly, weld joint grooves in the lining are formed; thirdly, the metallurgical composite tube is formed; fourthly, weld joints for repair welding are formed, so that continuity of the corrosion-resistant alloy lining is achieved. The production process has the advantages of both hot rolling metallurgical composition and electric resistance welding; a hot-rolled metallurgical composite base layer and the lining are combined in a metallurgical mode through a hot rolling method, so that high combination strength is achieved, and the situation that the corrosion resistance of the lining is affected by alloying element dilution due to dissimilar metal welding is avoided. Due to the fact that the base tube and a lining tube are combined in a metallurgical mode, the composite tube can be subjected to circumferential weld welding on a construction side with no need for circumferential build-up welding or sealing welding of tube ends. The production process is simple, convenient, easy to implement, and reliable in quality; transition welding materials are not needed between the base tube and the lining, so the welding materials and welding time can be saved, and production efficiency is high.

The invention relates to a narrow-gap MAG welding method for large-thickness shroud type diaphragms of turbines to solve problems of conventional groove forms of prior turbine diaphragms, low production efficiency of CO2 shielded welding, instable welding quality, and high repair rate and production cost. The method comprises that narrow-gap V-shaped grooves (usually 6 degrees to 8 degrees) are opened on a diaphragm outer ring and a diaphragm body respectively, a main weld joint of a gas outlet side is spot welded, and cross spot welding is performed; a spot welding Z-shaped connection block is assembled on a middle split surface of the diaphragm, and a spot welding lead and an arc blowout plate are assembled on the other side; a main welding joint of a gas inlet side of the diaphragm is spot welded firmly; gas passages of the gas inlet side and the gas outlet side are covered with a layer of asbestos cloth, and a rigid ring is welded; preheating and welding are preformed, and the diaphragm is completed through the MAG welding method; and de-stressing heat treatment is performed after welding. The narrow-gap MAG welding method for large-thickness shroud type diaphragms of turbines is applied in the mechanical welding field.

The invention belongs to the technical field of steel structure welding, and discloses a back chipping-free and full penetration robot welding technology of a medium plate (t>=30 mm) K-shaped groove.The robot welding technology comprises the steps that plates are prepared, the plates are cut so as to form a technology groove, splicing welding is conducted on the plates, a lead-in arc plate and alead-out arc plate are additionally installed, and full-length welding is conducted on an additionally installed rib plate. Welding is conducted on the two medium plates by applying the robot weldingtechnology, then the lead-in arc plate and the lead-out arc plate are dismounted, and ultrasonic checking is conducted on a welding seam of a spliced plate. In the welding process of the medium plates, it is ensured that the quality level of the welding seam can reach the requirement of a full penetration welding I level, welding deformation is small, back chipping treatment does not need to be conducted on a welding pass, welding materials are saved, the production cost is reduced, a large number of human resources can be saved by adopting robot automation welding, the manual labor intensityis relieved, meanwhile, the production efficiency is high, and the construction requirements for being advanced in technology, and capable of saving energy and reducing consumption are met.

The invention discloses a device and method for controlling a suspension welding seam root gap and welding deformation in a self-supporting mode. The device comprises a positioning block, upper rigid press blocks, a lower rigid press block and a forming groove. The positioning block comprises a positioning block body and a positioning part, wherein the positioning part penetrates through the seam root gap and is embedded in the forming groove. The upper rigid press blocks are symmetrically installed on the two sides of the positioning block body, the lower rigid press block is provided with provided with an inward-concave part matched with the forming groove, and the forming groove is formed in the inward-concave part. Magnets are installed in the upper rigid press blocks and the lower rigid press block. The invention further discloses the method with the device for controlling the suspension welding seam root gap and the welding deformation in the self-supporting mode used. The device for controlling the suspension welding seam root gap and the welding deformation in the self-supporting mode is convenient to use, low in cost and high in adaptation, the transverse retraction and staggered edges of a welding seam can be controlled, the welding deformation can be reduced, and it can be ensured that the back face of the welding seam is good in formation.

The invention relates to a pull-in manufacturing method of rib plates of a ship shell plate. The method comprises the steps that a, the rib plates are cut according to the ship precision requirement; b, a longitudinal rib panel and a longitudinal rib web plate are discharged according to the ship precision requirement; c, an FCB tailored welding inner shell plate is discharged according to the ship precision requirement, and longitudinal ribs are welded to the inner shell plate; d, the ends of the longitudinal ribs on the inner shell plate are aligned to lower penetrating holes of the rib plates and are gradually pulled into the multiple rib plates, the rib plates and the inner shell plate are welded into an inner shell component; and the rib plates are rigidly reinforced; e, according to the step a to the step d, an outer shell plate with the rib plates is also manufactured; f, hoisting equipment is utilized for lifting and pulling so as to turn the inner shell plate welded with the rib plates over, and upper penetrating holes in the rib plates of the inner shell plate and the ends of the longitudinal ribs of the outer shell plate are aligned; the longitudinal ribs of the outer shell plate are pulled into the rib plates of the inner shell plate, and the rib plates of the inner shell plate and the outer shell plate are welded to form an outer shell component; the inner shell component and the outer shell component are welded to form the complete ship shell plate.

The invention provides a self-protection flux-cored wire for steel rail repair welding. A flux core of the self-protection flux-cored wire comprises alloy components and slag system components. The alloy components include, by weight, 0.05-0.20 part of C, 0.60-1.20 parts of Cr, 1.00-3.50 parts of Ni, 0.30-0.70 part of Mo and 0.005-0.05 part of Zr. The slag system components include, by weight, 8-12 parts of Fe2O3, 0.5-3.5 parts of BaCO3, 12-17 parts of aluminum magnesium alloy, 24-32 parts of BaF2, 7-13 parts of CaF2, 13-18 parts of LiF2, 9-15 parts of rare earth ferrosilicon and 4-9 parts of Al2O3. According to the self-protection flux-cored wire for steel rail repair welding, no protective gas is needed in the welding process, the wire can make gas by itself to form the protective atmosphere, the wind resistant capacity is strong, welding can be applied under the four-level wind power, and the self-protection flux-cored wire is suitable for repair working on field steel rails.

The invention discloses an intelligent and efficient welding method of thin-wall stainless steel, and belongs to the field of welding of the machine building industry. The defect in the prior art areovercome. According to the method, P+T complex process welding equipment is adopted, and a welding method of combining plasma arc welding and argon tungsten-arc welding through an automatic control system is adopted. In the welding process, a workpiece is fixed, and a welding gun moves. Plasma arc welding and argon tungsten-arc welding can be synchronously completed in the welding process, and canalso be completed step by step. According to a step method, after through welding is carried out at a time through plasma arc welding, automatic wire filling is carried out through argon tungsten-arcwelding, and face covering is completed. When the thickness of a plate ranges from 3 mm to 8 mm, chamfering is not needed, and the synchronous method can be used. When the thickness of the plate is larger than 8 mm, chamfering is needed, and the step method can be used. The method is high in welding quality, single-face welding and double-face forming can be achieved, and welding efficiency is greatly improved; and welding materials are saved, the labor environment is improved, and the method is widely suitable for welding of circular longitudinal seams and plate seams of a thin-plate stainless steel container.

The invention discloses an improved welding process for longitudinal joint grooves of thick-walled container barrels. The improved welding process is applicable to steel plates thicker than 100mm. Theprocess includes: calculating straight length of a steel plate; marking a net material line and a center line on the steel plate; performing pre-bending and coiling forming; performing gas cutting toremove a pressure head of a three-roller plate bending machine from a container barrel section; performing processing of a narrow gap U-shaped groove according to the net material line; returning tothe three-roller plate bending machine to perform closing, rolling and aligning; finally starting a welding process; after welding is completed, subjecting the container barrel section to roundness correction. The improved welding process has advantages that a great quantity of welding materials are saved, labor intensity is relieved, production efficiency is improved, the once qualification rateof weld joints is greatly increased, and a promising application prospect is achieved.

This invention relates to flat pallet turn bracket and belongs to shipbuilding field, which comprises beam channel, two pieces of stiffeners, two pieces of non-skid square bars and two strength circular rings; set circular holes taken two points of bilateral symmetry along the center line of beam channel as the centers of circle; set stiffeners in back surface break angle of beam channel and non-skid square bars near the circular holes on beam channel right surface. This invention overcomes the shortcomings, the difficult problem that can not turn over in existing technique, and workpiece shortage and auxiliary material waste problem. Structure is simple and convenient to circuit use; operation staff will have high work efficiency and low labor intensity. This invention can save cost and has so many aforementioned advantages.

The invention discloses a method for enhancing back cover bond stress based on an offshore steel inclined pile foundation and relates to the technical field of civil engineering. The method comprisesthe steps of prefabricating shear connectors, prefabricating a hole sealing assembly, welding spiral ribs, assembling a prefabricated part, pouring concrete and sealing, and the like. The shear connectors are arranged on the periphery of the steel pipe pile, part of stress transmitted by the reinforced concrete layer can be transmitted in the direction perpendicular to the axis of the steel pipe pile, and therefore the compression resistance of the reinforced concrete layer is improved, and meanwhile the firmness of connection between concrete and the shear connectors can be guaranteed throughthe arranged extending pieces.

The invention provides a concentric-square-shaped groove frame machining method and a series connection insert joint bending die, and belongs to the technical field of mechanical stamping. Welding defects are reduced, leveling labor hours caused by heat deformation are shortened, and the labor intensity is reduced; and the problem about production narrow openings of Z-shaped bending is solved. The die is composed of three parts including a male die assembly, a female die assembly and a positioning device; insert series connection combining and jointing male and female die inserts are adopted in the male die assembly and the female die assembly correspondingly; the male die assembly comprises seven male die inserts of the same structure and with different lengths; and the concentric-square-shaped groove frame machining method comprises three times of bending. An insert joint tool bending process technology is used for reducing the split welding length, and a common angle supplementing process method is used for manufacturing. Bending of multiple products is completed through the insert joint bending die, the die manufacturing cost is reduced, die replacement can be rapidly carried out, and the product batch consistency is improved.

The invention relates to a 2205 dual-phase automatic welding method. The method includes the steps that longitudinal seams and circular seams of a tube body are welded by adopting a PAW/TIG dual-gun switching longitudinal seam automatic welding system and a PAW/TIG dual-gun switching circular seam automatic welding system. When the slag thickness of the 2205 dual-phase stainless steel tube body is4-10 mm, an I-shaped groove type is adopted, a groove is planned to be a straight edge in a straight-edge butt-jointing mode, and automatic PAW is used for self fusion welding without filler wires once and then is switched to automatic argon arc welding for covering with the filler wires once; and when the slab thickness of the 2205 dual-phase stainless steel tube body is 10-15 mm, a Y-shaped joint groove type is adopted, the groove angle is 75 degrees, the unilateral is 37.5 degrees, the truncated edge is 6 mm, and the automatic PAW is used for self fusion welding without the filler wires once, and then is switched to automatic GTAW for covering with the filler wires 2-4 times until full welding. According to the 2205 dual-phase automatic welding method, back gouging is not needed, automatic welding is achieved, the welding production efficiency is high, no spatter, powder, arc light, and noise exist in the welding process, shapes of welding lines are neat and beautiful, and the quality of whole equipment is improved.

The invention relates to a connecting structure of a skirt seat and a bottom sealing head. The connecting structure of the skirt seat and the bottom sealing head comprises an upper welding seam (1), aconnecting member (2), a skirt seat cylinder/transition section (3), a lower welding seam (4), the sealing head (5), a circumferential welding seam (6) and sealing head end excess materials (7). Theconnecting structure is compact in structure and small in welding seam cross-section size, required weld metal is only about 30% of a traditional bead welding type, the manufacturing method is simpler, the manufacturing period is short, processing excess materials can be utilized, the cost is low, the quality is reliable, and compared with the prior art, the defects of complex manufacturing process, more welding materials consumption, large welding workload, long period, high cost and the like are overcome to a great extent.

The invention relates to a column plate longitudinal seam abutting method. The method comprises the following steps: taking a positioning tool, wherein the tool comprises a permanent magnetic lifting jack, a strip-shaped plate is arranged at the front side of the permanent magnetic lifting jack and is higher than the bottom surface of the permanent magnetic lifting jack; fixedly adsorbing the permanent magnetic lifting jack on one side of a column plate longitudinal seam so as to align the strip-shaped plate to the column plate longitudinal seam; inserting a crowbar into a clearance between the strip-shaped plate and a column plate, assembling and positioning the dislocated longitudinal seam by utilizing the lever force of the crowbar and welding the assembled and positioned part; moving the permanent magnetic lifting jack along one side of the longitudinal seam, assembling and positioning the un-welded part again and welding until the overall column plate longitudinal seam is abutted. The column plate longitudinal seam abutting method disclosed by the invention is convenient to operate, time-saving and labor-saving; the overall plate seam needs not to be grinded because an original horse plate is cancelled, the quality of the plates at the two sides of a welding seam is guaranteed, and the appearance quality is considerably improved after painting is finished.

The invention discloses a method for repairing internal defects of large-sized forge pieces through electroslag welding with a tube electrode. The method comprises the following steps of: 1, drilling through and removing defects in a workpiece to obtain a defect through hole, and arranging an ending plate and an arc striking plate above and below the defect through hole; 2, making a tube electrode and a welding wire serving as an electrode extend inwards, fixing on the arc striking plate below the inside of the defect through hole, and grounding the workpiece; 3, arcing the welding wire and the arc striking plate in a short-circuiting way, continuously adding a powdery welding flux into the defect through hole, increasing the welding wire feeding speed and lowering the welding voltage to insert the welding wire into a slag basin; 4, increasing a molten welding seam metal, raising the liquid level, cooling and condensing till the slag basin rises to the upper edge of an axle center through hole of the ending plate; and 5, cutting the arc striking plate and the ending plate which are bonded together off, and grinding the upper and lower condensing surfaces of the defect through hole. The method for repairing through electroslag welding with the tube electrode disclosed by the invention is easy, convenient and reliable, and has high welding efficiency.

The invention discloses a ring-shaped gas stove head and a manufacturing method thereof. The ring-shaped gas stove head is mainly composed of a ring-shaped metal ring and a gas inlet tube, wherein thering-shaped metal ring is bent by a tube bending machine; the gas inlet tube is provided with an arc shape bent by the tube bending machine; the ring-shaped metal ring and the gas inlet tube can be combined into a multi-ring-shaped gas stove head, for example a single-ring-shaped gas stove head, a double-ring-shaped gas stove head and a three-ring-shaped gas stove head; small fire holes formed byan air plasma cutter are formed in the upper surface of the metal ring; and the small fire holes close to the gas inlet tube are designed to be scarce or are relatively small in diameter, so that combustion heating is more uniform. The ring-shaped gas stove head is simple in processing and manufacturing, is high in production speed, is low in cost, saves fuels, and has a relatively good use and popularization value.

The invention discloses a suction cylinder steel pipe machining and manufacturing technology for a suction type jacket, and relates to the field of submerged-arc welding steel pipe machining and manufacturing. The suction cylinder steel pipe machining and manufacturing technology involves a suction cylinder steel pipe and comprises the following steps that in the machining process of the suction cylinder steel pipe, steel plates are spliced firstly, and then the steel plates are rolled, in the rolling process, cylinder deformation caused by self-weight collapse of the steel pipe is prevented through side support and top support auxiliary tools, longitudinal seam submerged-arc welding is conducted after rolling is completed, well supports and inner reinforcing rings are additionally arranged at the two ends of a single-section steel pipe, multiple sections of cylinders are assembled on a special rotating roller with side holding arm supports and transferred to a welding station througha combined axis vehicle, during circular seam welding, multiple stations are synchronously carried out. According to the suction cylinder steel pipe machining and manufacturing technology for the suction type jacket, firstly, the steel plates are spliced, after the steel plates are spliced, circular seam grooves are machined, butt joint line deviation is controlled, and it is guaranteed that the misalignment amount of the rolled steel plates meets the technological requirement.

The invention relates to an aero-engine turbine rear case support plate long crack A-TIG welding restoration method. The method includes the following steps: S1, grinding and cleaning; S2, coating a crack with soldering flux; S3, argon arc welding; S4, benchwork grinding; S5, stress relief heat treatment; and S6, inspection. The idea of performing active TIG welding (A-TIG) to restore the long crack of a rear case support plate of an aero-engine turbine is put forwards in the method, the heat input of a welded joint is low, welding heat affected zones are reduced, and the mechanical property of the welded joint is improved. The deformation amount of an intermediate case is greatly reduced compared with that in a TIG welding method. The engine maintenance cost is greatly reduced and the engine maintenance period is shortened.