97results about How to "Save welding material" patented technology

A manufacturing method for ultra-long and ultra-thick circular plate is suitable for the steel circular plate which has a length more than 10 meters and has a thickness more than 100 millimeters. The method comprises the following steps: forging a plurality of segments of ultra-thick cylinders; carrying out mechanical processing to make the inner diameter, the wall thickness and the surface roughness accord with the requirements; and processing bevels at two ends. The invention is characterized in that the plurality of segments after procession are placed on a rolling jig bed 5; an interface part is fixed with a fixing plate; then the butt welding is performed after the bevels are added with ceramic gaskets 6; the long cylinder is prepared; the cutting is performed; and the ultra-long ultra-thick circular plate with the required dimension is manufactured. The invention has the advantageous of capability of manufacturing the ultra-long and ultra-thick circular plate with the length of more than 10 meters and the thickness of more than 100 millimeters, having high mechanical property of the manufactured plate, and having simple and convenient manufacturing method, easy operation and reduced manufacturing cost. The manufacturing method for ultra-long and ultra-thick circular plate can be widely used in the watercraft manufacturing industry and other mechanical chemical industry.

The invention relates to a welding method for insertion nozzle and cylinder non-rectangular intersection connector, characterized in that saddle automatic submerged arc welding machine or deep and narrow groove welding torch is used; the groove shape is I-type, namely the angle of groove at two sides is O; the nozzle is set vertically and the cylinder is oblique; auxiliary tooling is used; the welding method from the lower part to middle part to upper part is adopted to achieve purposes of automatic submerged arc welding and control deformation. The merit of invention is that the influence of human factor to welding quality is decreased; the welding efficiency is improved greatly and the machining period is shortened; welding material can be saved notably; welding quality can be guaranteed in effect; and the machining cost is decreased greatly.

A welding method for U-shaped ribs of an orthotropic deck plate of a bridge girder comprises the following steps that: 1) bevels are formed at the outer sides of the U-shaped ribs, each truncated edge P is 1-3mm, and the angle alpha of each bevel is 45-55 degrees; 2) the U-shaped ribs are longitudinally arranged on the deck plate and are positioned on the deck plate; 3) the deck plate is fixed on a reversible deformation jig frame, and the reversible deformation angle is 0.3-0.45 degrees; and 4) the U-shaped ribs are wholly welded on the deck plate through a solid welding wire argon-riched shielded welding process. According to the welding method, the defects in the prior art can be overcome, and the welding method has the advantages that the safety and the reliability are good, the efficiency is high, the cost is low, etc.

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 discloses a double-side double-arc welding process for a root layer of a pipeline, and the process comprises preparation before welding and backing welding. By utilizing the backing welding process of the double-side double-arc welding for the root layer of a pipeline disclosed by the invention, the inside and outside welding seams of the pipeline can be formed once, and the both surfaces of a molten pool for the pipeline are always in the protection of argon, so that the generation of air vents is avoided, the formation for the inside and outside welding seams of the pipeline is good, the dimensional requirements are relatively decreased due to assembly, the welding difficulty of welders is decreased, welding deformations are reduced, welding speed is increased, welding efficiency is increased, welding defects are reduced, energy and welding materials are saved, and welding cost is reduced. Simultaneously, by virtue of the design for the process parameters of a welding gun for the inside and outside of the pipeline, and under the action of the blowing force of double arcs, the flowability of metals in the molten pool is improved, the heat energy of the double arcs is adequately exerted, the penetration capacity is improved, and the welding characteristics of stainless steel are adapted, thus improving the quality of welding joints, and guaranteeing the welding quality.

The invention provides an argon arc welding process for a narrow gap hot wire. The process comprises pre-welding preparation processes which comprise a groove formation process, a groove butt joint assembly process, a welding material selection process and a welding parameter setting process, a bottoming welding process, a filling welding process and a surface covering welding process. In the improvement of the process, a groove is a narrow gap U-shaped groove; a hot wire process is used for the bottoming welding process, the filling welding process and the surface covering welding process; the argon arc welding process meets the requirements of full-automatic all-position welding and has a reasonable design; by the process, welding processes can be reduced, welding materials can be saved, cost and labor intensity of workers can be reduced, and welding quality and efficiency can be effectively improved; and the process is particularly suitable for the pre-manufacturing welding of a pipeline which cannot be rotated.

The invention provides a fixing device and method for a refractory material in a strip steel heat treatment furnace. The fixing device comprises a furnace shell steel plate, a thermal insulation layer and fireproof ceramic fiber folding blocks, and the furnace shell steel plate, the thermal insulation layer and the fireproof ceramic fiber folding blocks are connected in order. The fixing method comprises the following steps: marking a line to specify welding positions of bolts; welding bolts on the furnace shell steel plate and allowing the bolts to pass through the thermal insulation layer; sleeving an L-shape steel plate onto the bolts through location holes in the L-shape steel plate and fixing nuts on the bolts; destroying screw threads below the nuts by spot welding after the nuts are positioned; allowing penetration ribs to pass through suspension apertures in the L-shape steel plate; sequentially sleeving the fireproof ceramic fiber folding blocks on the penetration ribs and installing the fireproof ceramic fiber folding blocks in place; repeating the previous step so as to install all the rest fireproof ceramic fiber folding blocks until the furnace is filled with the fireproof ceramic fiber folding blocks. According to the invention, the rest fireproof ceramic fiber folding blocks are fixed on a furnace wall or a furnace roof; meanwhile, problems resulting from utilization of fireproof ceramic fiber modules are avoided successfully.

The invention discloses a crane girder. The crane girder comprises a girder, wherein supporting pedestals are fixed at two ends of the lower part of the girder made of a rectangular pipe; a pull rod passes through the middle part of the supporting pedestals at the two ends of the girder and is fixed by a tensioning nut; the rectangular pipe is subjected to one-step parabolic formation by an arch raising machine; the supporting pedestals fixed at the two ends of the girder made of the rectangular pipe are connected through a high-strength hinged bolt; the pull rod can also adopt a guy cable; and a thin steel plate cover with the same width as that of the girder is arranged at the lower part of the girder. The crane girder has the following effects that: welding deformation is reduced; almost no welding stress exists; the problem that the camber of the conventional girder is gradually reduced because the welding stress releases is solved; the self weight of the crane is 15 to 20 percent lighter than that of the conventional crane, so the problem about the initial investment of users is solved; and the wheel pressure is low, so the service life of a workshop is prolonged, the building cost of the workshop is reduced, welding materials such as welding rod flux and the like are greatly saved, industrial pollution is reduced and the manual manufacturing cost is reduced.

The invention discloses a single edge groove submerged arc welding technique of a plate with moderate thickness. The technique utilizes a DC (direct current) opposition method, and comprises the following technical steps: first to third layers on the facade: a phi 3.2 welding wire is utilized, the current is 380-400A, a rod is stretched by 2.8-3.0cm, the voltage is 24-25V, and the speed is 55-57cm/min; the other layers on the facade of the welding rail: a phi 4 welding wire is utilized, the rod is stretched by 3.0-3.5cm, the current is 560-600A, the voltage is 28-30V and the speed is 45-50 cm/min, or a phi 4 welding wire is utilized, the rod is stretched by 3.8-4.0cm, the current is 650-680A, the voltage is 33-34V, and the welding speed is 38-40 cm/min; and the back surface layer: a phi 4 welding wire is utilized, the rod is stretched by 3.8-4.2cm, the current is 680-700A, the voltage is 34-35V, and the speed is 34-36 cm/min. According to the invention, the submerged arc welding is directly used for bottoming, and no back chipping is performed on the back surface of the weld, thereby solving the complex welding method of the traditional technique, guaranteeing the percent of pass of the weld flaw detection, reducing the welding time and saving the welding material.

The invention discloses a filter lens for electric welding and a method for manufacturing the filter lens for electric welding. The lens is made of resin lens materials, iron oxide particles of core-shell structures, titanium oxide particles of core-shell structures, and copper oxide nano particles of core-shell structures, wherein the iron oxide particles, the titanium oxide particles and the copper oxide nano particles are scattered in the resin lens materials, the overall weight of the nano particles is 0.5%-3.5% of the overall weight of the resin lens materials, the weight ratio of the iron oxide particles to the titanium oxide particles and the copper oxide nano particles is 1.8-2.1:1.8-2.1:0.9-1.1, the inner cores of the nano particles are made of iron oxide, titanium oxide and copper oxide, the particle sizes of the nano particles are 10 nm-50 nm, a shell is a surface finishing agent or a surface modification agent, and the thickness of the shell is 3 nm-10 nm. By the adoption of the filter lens, a workpiece can be clearly seen before arcing, harmful hard light can be filtered out after arcing, and eyes are protected.

The invention discloses a thick steel plate submerged arc penetration welding back-chipping-free welding method and a groove structure thereof. The method includes the steps that (a) the positions ofwelding grooves of two steel plates equal in thickness are determined, and the steel plates displayed to have defects through flaw detection are replaced, wherein t is the thickness of the steel plates; (b) the two steel plates are cut and blanked; (c) butt joint grooves are formed, wherein when t is smaller than or equal to 30 mm, the butt joint grooves are formed to be in I shapes, and when t islarger than 30 mm and smaller than or equal to 100 mm, the butt joint grooves are formed to be X-shaped grooves with reserved truncated edges; (d) the two steel plates and a twin-wire welding machineare assembled in place, and the two steel plates are preheated, wherein direct current is provided for a front wire, and alternating current is provided for a back wire; (e) submerged-arc welding front face welding is carried out; (f) submerged-arc welding back face welding is carried out; and (g) postwelding heat preservation is carried out in a heat preservation groove at the temperature ranging from 300 DEG C to 400 DEG C. The thick steel plate submerged arc penetration welding back-chipping-free welding method and the groove structure are used for solving the problem that in the prior art, the thick steel plates with the thickness smaller than 100 mm are long in time wasted for welding and large in loss, and the aims of shortening the welding time of the thick steel plates with the thickness smaller than 100 mm and improving the welding efficiency are achieved.

The invention relates to a nickel-based alloy surfacing welding process for an alloy tank. A welding process is carried out by way of cold metal transition welding, and shielded welding is carried outby adopting consumable electrode gas in the welding process. During use, the dilution rate of the surface of the surfacing is reduced greatly, the high-temperature resistance and the corrosion resistance of a material are improved and a welding material is saved by adopting the nickel-based alloy surfacing welding process by way of cold metal transition welding. Meanwhile, a multi-pass surfacingmode with at least two passes is adopted in the welding process to fill the alloy tank, so that the welding defects of incomplete fusion, solder skips and the like during welding can be solved, and the welding quality is guaranteed.

The invention provides a structural steel and forged steel stud butt joint welding method for a hull and belongs to a welding method among high-strength steel materials. The method solves the problems that by means of an existing high-strength structural steel and forged steel stud butt joint welding method, the welding seam strength is low, and the welding workload is large. The method includes the steps of groove forming, unilateral bead welding, preheating and welding. By means of the structural steel and forged steel stud butt joint welding method, machining is easy, welding deformation is reduced effectively, special 902 steel and SA508-3 forged steel stud butt joint welding is achieved smoothly, weldability test and welding process evaluation are achieved, labor efficiency can be improved, welding materials and electric energy are saved, man hours are reduced, production cost is lowered, the building period of ships is reduced, and the blank in structural steel and high-strength forged steel stud butt joint welding for ships in China is filled.