864 results about "Flame cutting" patented technology

A rare-earth-containing ultrahigh strength collapse-resistant petroleum casing and a production method thereof belong to the technical fields of ferrous metal smelting and metal press working. The petroleum casing comprises the following raw materials by weight percent: 90% of blast furnace molten iron and 10% of high quality steel scrap. The casing blank comprises the following chemical components by weight percent: 0.18-0.35% of C, 0.10-0.35% of Si, 0.55-1.10% of Mn, less than or equal to 0.025% of P, less than or equal to 0.020% of S, 0.60-1.10% of Cr, 0.15-0.50% of Mo, 0.01-0.03% of Al, 0.0005-0.0100% of RE ( RE is the mixed rare earth metals of Ce and La and the weight percents of Ce and La are 67% and 33% respectively), less than 0.10% of Cu, less than 0.10% of Ni and the balance of Fe and trace elements. The process flow of the production method is as follows: pretreating molten iron, smelting in a top-bottom blowing converter, refining in a ladle furnace (LF), performing VD vacuum treatment, performing continuous casting of round billets, performing flame cutting, heating the casing blanks, boring, performing continuous rolling, performing sizing and diameter reducing, cooling, performing saw cutting, performing heat treatment, straightening, performing flaw inspection and lathing screw threads. The mechanical properties of the petroleum casing are as follows: the strength is no less than 140000PSI, the residual stress is no more than 80MPa, the impact power is no less than 80J and the grain size is no less than the grade 8. The product is characterized in that the residual stress is low, the content of harmful elements is low, the impact toughness is high, the grains are small, and the product resists extrusion and is difficult to damage.

The invention provides a continuous-cast P91-steel round pipe billet and a production process thereof. The production process includes 1) injecting molten steel into a tundish (3) and controlling degree of superheat of molten steel; 2) adding mold flux (13) to the surface of molten steel of a crystallizer (4) and solidifying the molten steel into a billet casing (20) with a liquid core (19); 3) stirring the front of the solidified molten steel by the aid of a one-way rotary magnetic field, applying a thrust force to the liquid core of the cast billet by a traveling wave magnetic field, and stirring the tail end (17) of the solidified molten steel by a two-way alternative rotary magnetic field; 4), drawing the billet casing to an arc guide segment (18) to form an initial round billet and cooling the initial round billet by a secondary cooling region which is divided into three sections; 5) straightening the cooled cast billet by eight rollers; and 6) cutting the cast billet into fixed-length billet sections by torch flame and annealing the same to obtain continuous-cast round pipe billets. The round pipe billets produced by the production process solves the problems that diameters of round pipe billets in the prior art are too small and surface cracks, middle cracks and straightened cracks of the round pipe billets in large diameter are hard to meet industry requirements.

The invention relates to molding technology of a safe shell head plate which is a nuclear power station device, which belongs to the technical field of nuclear power safety device processing. The ultra-large type head plate integral pressing and molding technology comprises the following steps: steel plate flame cutting for blanking, steel plate heating and heat preservation, steel plate discharging and overhead hoisting, steel plate pressing, steel plate pressure releasing and overhead hoisting, steel plate measurement by a robot and nozzle processing. The safe shell sealing head is made of carbon-silicon-manganese materials SA738B, each steel plate which can form the sealing head has the length of about 10 m, the width of 4 m and the thickness of 41.3 mm, and the molded sealing head has the inner diameter of about 40 m and the height of about 11 m and is totally divided into four layers. The ultra-large type head plate integral pressing and molding technology can replace the prior graded pressing and point-pressing technology, increases production efficiency, prolongs the service life of workpieces and realizes the integral mould pressing and once molding of an ultra-large type ellipsoid head plate of a steel safe shell container of an AP1000 pressure water reactor nuclear power station.

The invention belongs to the technical field of metallurgy, and mainly relates to an 18CrNiMo7-6 round billet continuous casting method for vertical type continuous casting production gear steel. The method includes the steps that primary melting molten steel with low carbon, phosphorous and harmful element contents is obtained through smelting in an electric-arc furnace; deoxygenation, desulfuration and complete alloying are carried out in a steel ladle refining furnace, and vacuum degassing is carried out in a VD furnace; continuous casting round billets are obtained on a vertical type continuous casting machine in a pouring manner; in the continuous casting process, long nozzle argon blowing and stopper rod argon blowing are adopted for protecting pouring, and two-stage electromagnetic stirring is achieved through a crystallizer and casting strands; the round billets are cooled in a second cooling zone at three periods; and symmetrical solidification and flame cutting are carried out in the vertical direction. According to the continuous casting round billets produced according to the method, the problems that in the prior art, 18CrNiMo7-6 gear steel is high in production cost, the banded structure is disqualified, and the oxygen content is high are solved.

The invention discloses a torch-flame cutting process for super-thick steel plates, which includes steps of utilizing a numerical-control torch-flame cutting machine for torch-flame cutting of the super-thick steel plates, placing a to-be-cut steel plate on the numerical-control torch-flame cutting machine while keeping the surface of the to-be-cut steel plate perpendicular to a cutting torch of the numerical-control torch-flame cutting machine and keeping the distance from the cutting torch to the surfaces of the to-be-cut steel plates ranging from 10mm to 30mm; setting cutting speed, preheating time, preheating oxygen pressure, cutting oxygen pressure and dimethylmethane pressure of the numerical-control torch-flame cutting machine; regulating flame strength of the cutting torch by utilizing the right-angle position formed between the surface of the to-be-cut steel plate and the lateral side thereof as an initial cutting point, enabling the secondary flame to be longer enough to reach the bottom of the to-be-cut steel plate, preheating the initial cutting point for a preset preheating time before initial cutting, and then turning on cutting oxygen, moving the cutting torch forwards when slag flows downwards along edges, and finally increasing moving speed of the cutting torch when the slag is discharged from the bottom until completing the normal cutting operation. The torch-flame cutting process for the super-thick steel plates is capable of guaranteeing quality of cut surfaces, is simple and stable, is safe in use and meets production requirements.

The invention relates to a cutting torch of a cutting saw for cutting metal and belongs to the field of flame cutting tool. The cutting torch comprises a central tube and an outer housing; the central tube is inserted into the outer housing for assembling; wing platforms are arranged on the outer wall of the central tube and an oxygen passage is arranged inside the central tube; sinking grooves and rib platforms are arranged on the inner wall of the outer housing; after the central tube is inserted into the outer housing, the wing platforms are matched with the sinking grooves, each rib platform on the inner wall of the outer housing and the central tube are contacted with each other for positioning; the central tube and the outer housing are positioned in the radial direction; after the central tube is inserted into the outer housing, a fuel gas passage is formed between the outer wall of the central tube and the inner wall of the outer housing; a fuel gas nozzle is formed by the fuel gas passage at the head end of the cutting torch, which is close to the rib platforms. The invention provides a manufacturing method for cutting torch, the central tube and the outer housing of the cutting torch adopts a powder metallurgy technology and are formed at one step, so that the fabricating technology is simplified, the production efficiency is improved greatly, the utilization rate of the raw material can reach more than 99%, the texture of material can be replaced flexibly according to different performance requirements of the cutting torch.

The invention provides an amorphous, microcrystal or nanocrystalline alloy stator core and a method for producing the same. The method for producing the stator core comprises the following steps that an amorphous, microcrystal or nanocrystalline alloy strip is laterally cut into a plurality of rectangular sheets with the same shape and size; the alloy sheets which are obtained through lateral cutting are subjected to annealing treatment; a plurality of alloy sheets which are obtained through annealing treatment are subjected to resin solidification treatment to obtain amorphous, microcrystal or nanocrystalline alloy sheets with the preset thickness; any one mode of laser cutting, plasma cutting, water cutting, wire cut electrical discharge machining, flame cutting and chemical etching is used to cut the alloy sheets with the preset thickness to obtain annular amorphous, microcrystal or nanocrystalline alloy splicing modules or at least one single-tooth circular arc splicing module; and the annular amorphous, microcrystal or nanocrystalline alloy splicing modules or at least one single-tooth circular arc splicing module are laminated or spliced to form the stator core. According to the method for producing the stator core, the production efficiency can be increased, and the cost can be lowered.

The invention discloses an automatic laser scanning positioning steel grating numerically-controlled cutter, which comprises a numerical control system, a laser scanner, an electrical appliance part, a driving mechanism, a flame cutting torch and an automatic ignition device, wherein the driving mechanism comprises an X-axis driving part, a Y-axis driving part and a Z-axis automatic heightener; the Z-axis automatic heightener is arranged at one end of a beam; the laser scanner is arranged on the Z-axis automatic heightener; the bottom end of a moving lever in the Z-axis automatic heightener is provided with the flame cutting torch and the automatic ignition device by a cutting torch holder; and the transverse, longitudinal and vertical fit and linkage of the flame cutting torch can be realized under the action of the driving mechanism. The cutter can realize automatic scanning and accurate positioning and realize continuous operations to form batch production, has a high automation degree, stable and reliable performance, high production efficiency, high cutting quality and high cutting accuracy, and can be used for cutting steel gratings of any material and various specifications and shapes.

The invention discloses a continuous casting billet online weight fixing system. The continuous casting billet online weight fixing system comprises continuous casting billets, a flame cutting device and a weight measuring device, the flame cutting device is used for cutting the continuous casting billets, and the weight measuring device is used for measuring the weights of the continuous casting billets. The weight measuring device comprises a computer, a length measuring module, a width measuring module and a thickness measuring module, wherein the length measuring module, the width measuring module and the thickness measuring module are electrically connected with the computer and used for measuring the lengths, the widths and the thicknesses of the continuous casting billets correspondingly. The computer calculates the real-time weights of the continuous casting billets by combining the measured sizes of the continuous casting billets according to the density information, obtained in advance, of the continuous casting billets and sends the real-time weights to the flame cutting device for fixed weight cutting of the continuous casting billets. The length measuring module comprises a laser range finder used for measuring the level at which the flame cutting device arrives at an original position so as to compensate and correct the measured lengths of the continuous casting billets. The continuous casting billet online weight fixing system can accurately calculate the real-time weights of the continuous casting billets for fixed weight cutting of the continuous casting billets, and therefore the weight deviation of the cut continuous casting billets is stabilized within an allowable range, and the requirement of efficient continuous casting production can be met.

The invention provides a prefabrication method of a standard roughness joint surface of a rock-like test piece, and belongs to rock mechanics test methods. The method comprises the steps that a roughness curve is input in a numerical controlled flame cutting machine to cut stainless steel plates, and standard joint surface mold plates with different roughness are obtained; a mold for making the rough joint surface is obtained through assembling, a joint surface mold plate with the corresponding roughness is selected, and spaces between standard joint mold plates are adjusted according to opening of the prefabricated joint surface; a machining groove is filled with liquid replication materials, and after cooling forming is conducted, replication material joint pieces are obtained through demolding and cutting; the joint pieces are fixed on preset positions of a test piece machining mold, and liquid rock-like materials are injected into the mold; demolding is conducted after forming, the rock-like test piece is subjected to high temperature, the joint pieces are melt and flow out, and the rock-like test piece with the joint surface with specific roughness is obtained. The method has the advantages of being easy and convenient to operate, easy to repeat, low in cost, high in accuracy and the like, and the method has a wide application prospect in test research of physical and mechanical property of rock structure surfaces.

A torch spacing apparatus for a plasma or flame cutting machine includes a gantry that is guided to travel in an X axis. Mounted to the gantry is at least one carriage that is / are guided to travel in a Y axis. Mounted to each carriage are selected tooling having at least two cutting torches mounted thereon with an active cutting tool in an active cutting position. The carriage is mounted to enable tooling substitution whereby the torch spacing apparatus includes a substitution mechanism which is operatively attached to the carriage and tooling such that the said substitution mechanism is adapted to allow the position of a cutting torch or active cutting torch to be substituted with another cutting torch currently in the active position to space the torches accordingly by rotating the cutting tools about a Z axis.

The invention discloses an aluminum electrolysis anode rod automatic repair annular production line and a repair method. The production line comprises ground circular rails laid on the ground and toolrail trolleys running on the ground circular rails and carrying anode rods, and further comprises an online turnover table, a numerical controlled flame cutting machine, a steel rod feeding robot, asteel rod feeding device, a steel jaw special welding machine, a double-anode turnover positioner, a numerical controlled flame cutting machine, a guide rod cutting machine, an explosion block feedingrobot, an explosion block feeding device, an explosion block special welding machine, a guide rod special welding machine and a guide rod planar milling device which are arranged along the ground circular rails. According to the aluminum electrolysis anode rod automatic repair annular production line, the traveling trolleys and the circular rails are used as tools for transporting and fixing theanode rods so that the anode rods can be transported quickly between operation working positions; meanwhile, the anode rods are directly repaired on the trolleys, so that the anode rods are repaired between different working positions more quickly and efficiently to form anode rod repair assembly line operation, and the anode rod repair efficiency is greatly improved.

Disclosed are a continuous casting and rolling device and a process for a composite plate. The device comprises a continuous casting machine body, two steel ladle rotary tables, a tundish mounting platform, two tundishes, two crystallizers, a composite area, a secondary cooling area, extrusion rollers, hold-down rollers, a flame cutting device, a descaling machine, a tension leveler and a continuous rolling unit, the two tundishes are mounted below the different steel ladle rotary tables through the tundish mounting platform, the crystallizers are disposed below the tundishes, the composite area is disposed below the two crystallizers, the extrusion rollers and the hold-down rollers are arranged below the composite area, the secondary cooling area is located below the hold-down rollers, and a horizontal outlet end of the secondary cooling area is sequentially connected with the tension leveler, the flame cutting device, the descaling machine and the continuous rolling unit. The continuous casting and rolling device and the process for the composite plate have the advantages that the width of a composite plate blank can be adjusted, continuous production can be achieved, the process is simple, costs are low, the efficiency is high, operation and controlling are convenient, and the like.

The invention discloses a continuous casting billet laser sizing system. The continuous casting billet laser sizing system comprises a PLC unit, a laser detection unit, a display unit and a calculation unit, wherein the PLC unit controls a roller bed of a continuous casting machine and a flame cutting machine; the laser detection unit is connected with the PLC unit and is used for detecting relative positions of continuous casting billets; the display unit is connected with the PLC unit and is used for monitoring operating conditions of the whole system and allowing workers to input necessary data during debugging; the calculation unit is connected with the PLC unit and is used for converting the relative positions, detected by the laser detection unit, of end surfaces of the continuous casting billets into actual lengths of the continuous casting billets. The continuous casting billet laser sizing system has the advantages of being high in sizing precision, stable and simple in calibration, easy to install, debug, operate and maintain, low in operation cost and accurate in cutting, improves sizing rate and yield and reduces rejection rate.

The invention discloses a method for preparing large titanium steel composite plates for nuclear power and thermal power, which comprises the following steps: 1, preparing large cladding titanium plates or titanium alloy plates; 2, respectively performing surface polishing treatment on the cladding titanium plates or the titanium alloy plates and base steel plates; 3, assembling the cladding titanium plates or the titanium alloy plates and the base steel plates by an angle assembly method; 4, performing explosion composition on the cladding titanium plates or the titanium alloy plates and the base steel plates to manufacture preliminary products of large titanium steel composite plates; 5, performing annealing treatment; 6, performing flattening treatment; and 7, performing subsequent treatment, namely performing ultrasonic flaw detection, flamecutting of plate edges, machining of four sides, surface polishing treatment and conventional performance examination on the flattened preliminary products of large titanium steel composite plates. The method has simple operation, convenient implementation and low cost; and the produced large titanium steel composite plates have good quality, and can meet the manufacturing requirement of multiple kinds of large industrial equipment and components on the titanium steel composite plates.

The invention discloses a production process of a laminated-rolled wide sheet. The production process specifically comprises the following steps that (1) a blank is selected, the selected blank is bloomed to 70-75 mm, and then a bloomed sheet is subjected to flame cutting and sizing; (2) milling is carried out on the blank sheet subjected to primary sizing; (3) a groove is formed in the surface ofa lower blank, an isolating agent is sprayed in the groove, and the isolating agent is dried; (4) aligning and compounding are carried out on the dried lower blank and upper blank, and welding is carried out; (5) a blank boss is machined; (6) the blank sheet is placed in a stepping type heating furnace for heating; (7) descaling is carried out with high-pressure water; (8) broadening rolling is carried out by a 5000 mm rolling mill; (9) straightening is carried out; and (10) plasma cutting and sheet separating are carried out. According to the production process of the laminated-rolled wide sheet, limitation on a roll gap of a 5m rolling mill in producing wide sheets with the thickness of 6 mm or below by using the CVC technology can be solved, and meanwhile, the problems that a wide sheet with the thickness of 8 mm or below is high in curvature and large in plate projection degree are solved.

The invention relates to a method for cutting non-rectangular intersection pore on thick-wall cylinder by NC flame, characterized in that the process method that oxyacetylene air cutting is combined with the path run by NC boring-milling machine is adopted; and cutting torch and auxiliary tooling are used to achieve the purpose of opening pore. The method is that through the program of NC boring-milling machine according to the dimension demand of opening pore the math model is built; the 3-D path for opening pore on the surface of cylinder is found; the NC program known by machine is programmed; marking in advance can be carried out on the surface of cylinder so as to validate the validity of program; cutting test is carried out on waste material to test cutting width and depth of gas cutter knife; radius compensation and cutting speed can be considered; inputting parameters of cutting program is amended; formal gas cutting processing is carried out. The merit of invention is that it can machine irregular space path; it can form in one gas cutting so as to avoid uncertain thermal deformation generated by cutting in many times; labor source can be saved greatly; and the working efficiency can be improved greatly.

The invention relates to NM400-level anti-crack high-strength wear-resistant steel. The NM400-level anti-crack high-strength wear-resistant steel comprises the following components in percentage by weight: 0.04-0.08% of C, 0.20-0.50% of Si, 1.20-1.50% of Mn, not more than 0.015% of P, not more than 0.005% of S, 0.25-0.60% of Cr, 0.20-0.50% of Mo, 0.005-0.025% of Ti, 0.001-0.005% of B and 0.015-0.05% of Als. The production steps are as follows: smelting, and performing continuous casting to form a blank; heating the cast blank; rolling; water-rolling; air-cooling to room temperature; and tempering. The NM400-level anti-crack high-strength wear-resistant steel disclosed by the invention has the advantages of low alloy cost, small adding quantity of alloy and excellent welding performance and anti-flame cutting crack sensitivity, and can avoid the energy loss caused by a complex heat treatment process and simultaneously greatly shorten the production period; and in addition to the excellent welding performance and anti-flame cutting crack sensitivity, as the manufacturing process is simple and the flow process is short, the cost can be reduced by 15%, the energy consumption can be reduced by 25%, and the process operability is improved, thus the NM400-level anti-crack high-strength wear-resistant steel has very strong market competitiveness, broad application prospects and obvious economic and social benefits.

The invention relates to a welding method for lengthening H-shaped steel of a railway freight platform wagon chassis. The welding method comprises the following steps: intercepting the H-shaped steel according to preset length; arranging grooves with truncated edges on a H-shaped steel web and a wing surface; cutting the grooves by using oxygen-propane flame, removing adhering slag, oxide skin and oily rust, and grinding the grooves by using a grinding wheel; taking the web as a datum plane, butt-jointing the web with the wing surface in a horizontal position, wherein a butt-joint staggered edge of a flange and the web is not more than 1mm and a height difference between an upper wing surface and a lower wing surface of a butt-joint connector is not more than 1.5mm; performing two-sectional positioning welding on the web; after the positioning welding is qualified, welding; respectively welding end tabs and arc-collecting plates at two ends of the upper wing surface and the lower wing surface on the H-shaped steel; welding a butt welding seam on each side of the H-shaped steel by turning a crown block to a horizontal position; after welding, adopting the flame for cutting and removing the end tabs and the arc-collecting plates; reserving a 1-2mm step while cutting, and flatly grinding by using the grinding wheel; and when the staggered edge of the wing surface of the H-shaped steel is more than 1mm or the surplus height of seam exceeds 2mm, grinding an ultrahigh part and smoothly transiting the connector, thereby finishing the lengthening welding of the H-shaped steel.

The invention provides an intelligent security door system, which comprises a security door and an intelligent control box provided with a control circuit board, wherein the security door comprises a doorframe, a door leaf embedded in the doorframe and connected with the doorframe in a rotating way, and a ground beam fixedly arranged below the doorframe and fixedly connected with the floor; the intelligent control box is arranged above the door leaf of the security door; and the control circuit board comprises a signal receiving unit, a master control unit, a signal isolation unit and an electric control door lock unit. The intelligent security door system provided by the invention adopts an all-steel structure, is made from high-quality rolled steel by an advanced manufacturing process, and effectively realizes the functions, such as violent-damage prevention, fire prevention, drilling prevention, flame cutting prevention and the like, of the security door; and a door lock has a remote control function so as to realize the remote and real-time tracking of the opening state of the security door, and adopts the design of a concealed mechanical lock hole so as to prevent an ordinary lock from being rusted and enhance the security of the security door.

The invention discloses a method for improving the yield of qualified sized casting blanks at a casting stop stage of a continuous casting machine, belongs to the technical field of continuous casting control methods, and adapts to improve the yield of the qualified sized casting blanks at the casting stop stage of a square blank continuous casting machine. On the premise of fully considering the influence of tundish molten steel temperature and tundish residual molten steel quantity at the casting stop stage on casting blank production and casting blank quality, the restrictive relation between tundish molten steel weight and casting weight of each flow of the continuous casting is formulated, and the effective casting time for each flow of the continuous casting machine at the casting stop stage is calculated; steel casting is performed in sequence according to a prior distribution right order of the molten steel at a nozzle of each flow; in the case of meeting the restrictive condition, the length of each casting blank cut by a flame cutting machine corresponding to the casting machine of the flow can meet the requirement of sizing after the nozzle of each flow is closed certainly by controlling the operation of a stopper of each flow, so that the yield of the qualified sized casting blanks is improved, the utilization rate of molten steel in the tundish is improved, the improvement of the product quality and the yield is promoted, and the economic benefit of enterprises is improved.

The invention relates to a blaze three-cutting regulating mechanism, which belongs to the technology field of a welding-cut device. The angle rotary mechanism of a cutting gun adopted by the invention is locked by the check lock lever of the telescopic link of a telescoping mechanism that runs through the cutting gun. The telescopic link is connected with two cutting guns by a connecting bar. The telescopic link is also connected with a position block that is arranged on the hexagon rack, which is in the lateral shifting mechanism of the cutting gun. An auto-tracking mechanism is connected with the hexagon rack via a bracket. The invention has the advantages of convenient use, accurate positioning, sensitive auto-tracking mechanism and low device cost. The invention is provided with three cutting guns, two of which are arranged on both sides and one of which is arranged in the middle of the invention. As three cutting guns can cut bevel shapes at the same time, which only needs one positioning and one clamping, the error of the positioning and clamping can be reduced, the deformation of a work piece can be decreased, thereby ensuring the height of root face of the work piece is not different. Compared with the twice or thrice method of a single cutting, the invention has high efficiency and good processing accuracy. The process of cutting the bevel shape in the blaze cutting can be completed by the three cutting of a straight line instead of the single cutting which needs a plurality of times to complete the cutting process.

The invention relates to a process for the online cut-to-length cutting production of continuous casting slabs for a heavy plate mill. The process comprises the following steps: long slab reception; span-transversing; width centering; length and temperature measurement; cut-to-length slab mark spraying; cut-to-length cutting; cutting burr removing; unloading; and storing, wherein three pairs of flame cutting machines are distributed in a series-connection manner on the cutting line. Accordingly, the process of the invention is capable of simultaneously cutting two long slabs on-line according to various requirements for cut-to-length cutting; the process of the invention has the advantages of high production efficiency and small equipment occupied area; the cut-to-length cutting procedure has little impact on the main production line for continuous casting and heavy-plate milling; the process is capable of carrying out the mixed cutting process on cold and hot slabs, thus being favoring for the hot-loading and hot-feeding processes of slabs. Accordingly, the process of the invention is widely applicable to the online cut-to-length cutting production of the continuous casting slabs for the heavy plate plant.

The invention relates to the field of steel plate cutting and particularly relates to a portable flame cutting machine for cutting an oval shape. The portable flame cutting machine is mainly composed of a flame cutting machine and an oval control mechanism; the oval control mechanism comprises a magnetic base, a cross-shaped sliding groove, a radius adjusting transverse rod and a cutting nozzle height adjusting rod; the cross-shaped sliding groove is fixedly mounted on the magnetic base; sliding blocks are mounted in two vertical and horizontal sliding grooves of the cross-shaped sliding groove; each sliding block is connected with a radius difference adjusting rod through a bearing; the radius adjusting transverse rod is simultaneously connected with two radius difference adjusting rods through fasteners; one end of the radius adjusting transverse rod is connected with the upper end of the cutting nozzle height adjusting rod through a fastener; and the lower end of the cutting nozzle height adjusting rod is also connected with a cutting nozzle of the flame cutting machine through fasteners. The portable flame cutting machine provided by the invention is used for carrying out oval cutting, and the angle of the cutting nozzle can be adjusted, so that a welding groove is formed in a cutting seam; and the groove and cutting are finished at the same time, so that the product quality and the working efficiency are improved.

The invention relates to a rapid-mixing tubular flame burner with an axial jet function. The burner comprises a burner body and an axial jet device. A cyclone mixing cavity is formed in the burner body. The burner body further comprises at least two airflow inlets communicating with the cyclone mixing cavity in the tangential direction of the cyclone mixing cavity. According to the burner, fuel and an oxidizing agent are injected into the burner from tangential thin-slot inlets evenly distributed in the circumference correspondingly, and backfire and even explosion can be prevented under the conditions that the flow speed is low or the oxygen concentration is high and even pure oxygen exists. According to the burner, a large-density low-temperature unburned gas film is formed on the inner wall of a quartz glass tube through the aerodynamic characteristic, and a flame area inside the quartz glass tube is wrapped, so that heat transfer between flames and the wall surface is reduced, heat loss is effectively reduced, the heat utilization rate is high, a high temperature can be easily obtained, and the flame cutting quality and the yield of nano-particles synthesized through the flames are improved.

The invention discloses a flame cutting machine convenient for clamping of steel plates with different thicknesses. The machine comprises a worktable, and is characterized in that vertical stand columns are correspondingly mounted at the two ends of the worktable; the same top plate is in transverse fixed connection to the top ends of the stand columns; a thread rod is transversely arranged at theupper part in a driving box; a movable plate is positioned in a C type clamping frame; a cavity matched with the movable plate is formed in the inner side of a clamping top plate of the C type clamping frame; a slag collecting box opened at the top end is arranged at the back end of the worktable; and the slag collecting box is mounted on support legs through support plates. The machine is reasonable in structural design and convenient to operate; a push rod with the movable plate, a driving base, the thread rod, a connecting rod with rollers and an extension electric cylinder are arranged onthe C type clamping frame; and when the thicknesses of the steel plates are smaller than the height of the clamping frame, the deviation condition of the steel plates due to shaking is solved, so that the cut steel plates obtain anticipant shapes without needing cutting again, and the waste of steel is prevented.

The invention relates to an upper deburring machine for a continuous casting slab. The machine consists of a frame part, a lifting air sac, a cutter platform part, a cutter platform sliding system, an electric main control box, a machine-side operation box and a photoelectric detection system. Compared with a lower deburring machine, the upper deburring machine has the advantages that: the inclination angle of a cutter platform is increased, so that a hard cutting knob generated during flame cutting can be thoroughly removed; a cutter rod has the same structure as that of the lower deburring machine, so that convenience is provided for the spare part preparation work of a using unit, and equipment is easy to maintain; the cutter platform is provided with an internal water channel, and large discharge area ensures the cooling effect of a cutter rod assembly; an air sac and a high-temperature-resistant compression spring are combined in the lifting design of the cutter platform, so that the structure of the equipment is simplified and a product is convenient to maintain on the premise of ensuring the performance of the product; due to a unique water cooling plate design, the air sac is fully prevented from being influenced by a hot steel billet; and due to a check plate design, the cutter rod is convenient to replace when the equipment is maintained.

The invention discloses a portable type cutting device for intersection line of pipeline, which solves the problem that the prior cutting device for intersection line of pipeline has complicated structure, high cost and low processing precision. The invention has the advantages of simple structure, convenient use, low cost and good processing precision. The structure comprises an upper support and a lower support which is connected with the upper support. A flame cutting device with horizontal displacement is arranged above the upper support. A V-shaped support of the pipeline is arranged under the corresponding place of the upper support. A pipe rotating device is arranged on the pipe V-shaped support.

The disclosed cutting method with digital-control flame cutter comprises: a. designing pattern, which includes: according to product detail shape and target plate material, drawing the pattern figure with some closed ring figure element with same shape as the product; b. designing the cutting path and defining cutting processing codes; c. loading codes; d. cutting. During the procedure of startup, warm-up, perforating, cutting and flameout, this invention can process scores even hundreds details for one time.

The invention relates to a Y-shaped groove back-chipping-free submerged-arc welding technology for a moderately thick plate in a boiler and a pressure container. The technology comprises the steps that cutting and assembling are carried out before welding, particularly, a Y-shaped groove is cut in a moderately thick plate barrel through machining or flame cutting according to the plate thickness, wherein the groove gap is 0-1 mm, the root face size is 4-6 mm, and the groove angle is (60-80)+ / -5 degrees; Y-shaped groove front face submerged-arc welding bottoming is carried out, particularly, submerged-arc welding is directly adopted for carrying out welding on the front face of the Y-shaped groove, and the fusion depth is larger than 1 / 2 of the root face size in the welding process; the Y-shaped groove front face submerged-arc welding filling and facing are carried out, particularly, conventional current submerged-arc welding is used for carrying out repeated welding on the front face of the Y-shaped groove for groove front face filling and facing; and Y-shaped groove back face submerged-arc welding is carried out, particularly, submerged-arc welding is directly adopted for carrying out welding on the back face of the Y-shaped groove under the condition that back chipping is not carried out, and selection of welding parameters pays attention to control over the Y-shaped groove back face seam surplus height.