458 results about "Steel square" patented technology

A crane support consisting of a steel square tubing pedestal having an apertured mounting plate fixedly attached to its upper end, and having an enlarged base fixedly attached to its lower end; an axle, the pedestal being mounting rotatably upon the axle; an auxiliary implement mounting frame fixedly attached to a rearward end of the axle, such mounting plate being adapted for attachment to skid steer loader lift arms and bucket dumping rams; a pair of telescoping outriggers fixedly attached to and extending laterally from the pedestal, each outrigger arm having downwardly extendable and upwardly retractable foot fixedly attached to its distal end; a plurality of hydraulic cylinders operatively connected to the telescoping outriggers and to the feet for alternating lateral and vertical extensions and retractions; and a hydraulic cylinder connected operatively to the pedestal for alternately locking the pedestal against rotation with respect to the mounting frame and permitting such rotation.

The invention relates to a continuous casting bearing steel round steel with small compression ratio and high cleanliness, the chemical components according to weight percentage are: 0.90 to 1.10 percent of C, 0.20 to 0.50 percent of Mn, 0.15 to 0.50 percent of Si, 1.30 to 1.60 percent of Cr, being equal to or less than 0.0007 percent of oxygen, being equal to or less than 0.008 percent of phosphorus, being equal to or less than 0.005 percent of sulfur, being equal to or less than 0.0025 percent of titanium, being equal to or less than 0.25 percent of copper, being equal to or less than 0.10 percent of nickel, and the rest of Fe and inevitable impurities. The manufacturing method of the continuous casting bearing steel round steel with small compression ratio and high cleanliness comprises the following steps: the selection of liquid steel for steel-making, ladle pouring, pouring box continuous casting bearing steel square billet, heating continuous casting bearing steel square billet in a heating furnace, and rolling the continuous casting bearing steel round steel with the specification Phi from 20 to 75mm(compression ratio can reach the minimum 10.96) in a rolling mill. The nonuniformity of the eliquation carbide and the ribbon carbide of the obtained continuous casting bearing steel round steel reaches China national standards and meets the requirements of bearing manufacturer.

The invention relates to a microalloyed steel continuous casting cooling control method based on the steel grade solidification characteristic and evolution of microstructures. The critical technical contents of the microalloyed steel continuous casting cooling control method comprise steel grade solidification characteristic experimental analysis, continuous cast blank solidification structure numerical simulation, continuous casting cooling process water amount regulation and control and the like. Change rules of the thermoplasticity and a third brittle temperature range of a target steel grade at different cooling rates are determined through experiments at first, then the influences of the cooling rates on austenite/ferrite transformation and the microalloy element second-phase particle precipitation law are comprehensively analyzed with te combination with the experiments, and finally, the microalloyed steel square blank continuous casting cooling precise control strategy of "low superheat pouring, low cooling of a third secondary cooling zone and high cooling of a fourth secondary cooling zone" is provided, relevant regulation and control schemes, that is, the superheating temperature is 23 DEG C (the original value is 37 DEG C), the water amount of the third secondary cooling zone is 2.6 L/min (the original value is 51.5 L/min), and the water amount of the fourth secondary cooling zone is 165.6 L/min (the original value is 18.4 L/min) are made a new continuous casting secondary cooling regulation and control mechanism based on the microalloyed steel characteristic is built, a cast blank solidification structure is optimized, and the strength of a surface microstructure of the solidification structure is improved.

The invention discloses a continuous casting method for improving a central shrinkage cavity of a small high-carbon steel square billet. According to the continuous casting method for improving the central shrinkage cavity of the small high-carbon steel square billet, the degree of superheat, the amount of blown argon of a submersed nozzle and full-protection casting are controlled, the cooling specific water flow for secondary cooling and casting speed are adjusted, and soft reduction of the final stage of electromagnetic stirring and solidification of each crystallizer is carried out. The specific technological parameters are that the amount of blown argon of the submersed nozzle is controlled to be 15-20L/min under the condition that the full-protection casting is adopted, the average casting speed of a casting blank corresponding to each crystallizer is 2.6-3.0m/min, the cooling specific water flow of cooling water in the secondary cooling section of each crystallizer is 0.8-1.2L/kg, and aerosol cooling is carried out; casting with the low degree of superheat is adopted in the whole process, the degree of superheat is 20-40 DEC C, and soft reduction of the final stage of the crystallizer electromagnetic stirring under the condition of 460-480 A and 5-7Hz and solidification under the 0.4-4.5m condition is adopted. The continuous casting method for improving the central shrinkage cavity of the small high-carbon steel square billet has the advantages that the flow of the inlet gas and the specific water flow can be accurately controlled, cost is reduced, and products meeting all specifications are produced through adjustment of all parameters.

The invention discloses a method for sticking cakes in plastering engineering by using laser. The method comprises the step that: the cakes are stuck by taking a crossed vertical laser surface output by a laser marking gauge as a reference surface for sticking the mud cakes, namely, a control line is set on a floor of a building which is required to be subjected to plastering construction in a conventional mode, and the laser marking gauge is placed on the control line to keep a straight line projected to laser cross on the floor coincided or parallel with the control line; thus the mud cakes can be stuck by taking the laser surface which is coincided or parallel with the control line as the reference surface for sticking the cakes, the distance from the end face of each mud cake to the laser surface serving as the reference surface is measured by using an angle steel ruler, and the distance from the end face of each stuck mud cake to the laser surface serving as the reference surface is kept same. The method has the advantages of high construction efficiency, good quality, low construction cost, low requirement on the technical level of the construction personnel and the like, and is easy and convenient to operate, and the raw materials are saved.

The invention belongs to an aquaculture machine and relates to a waterwheel-type aerator. The waterwheel-type aerator comprises an impeller, a floating body, a main machine, a transmission shaft and a bearing seat, wherein the floating body is connected by virtue of a thin-wall stainless steel square tube; the square tube is provided with holes through which bolts cab pass; more than two floatingboats are combined by passing the bolts through square tube holes so as to form the floating body; a reinforcing plate is arranged above the square tube holes; two sides of the floating boats are provided with grooves and the bolts are fixed in the grooves; the impeller is composed of a blade and an impeller disc; the impeller disc is provided with a retaining mechanism which is molded by injection; one end of an elastic retaining strip and the straight edge of the impeller disc are molded into a whole body by virtue of injection and the other end of the elastic retaining strip is suspended; and after the blade is assembled in place, the retraining strip is reset and the blade is prevented from being moved out.

A swinging self-resetting dual-deck bridge bent pier based on energy-dissipation angle steel with vertical joints comprises a bent pier foundation, bottom-layer prefabricated concrete filled steel tube pier bodies arranged on the bent pier foundation and filled with self-compacting steel fiber reinforced concrete in a pouring mode, a bottom-layer prefabricated bent cap arranged at the top ends of the bottom-layer prefabricated concrete filled steel tube pier bodies, top-layer prefabricated pier bodies on the bent cap, a top-layer prefabricated bent cap arranged at the top ends of the top-layer prefabricated pier bodies, unbounded prestressed tendons penetrating through the bottom-layer prefabricated concrete filled steel tube pier bodies, the energy-dissipation angle steel with the vertical joints, bolts, steel square keys and the like. All the energy-dissipation angle steel with the vertical joints enables the bottom-layer prefabricated concrete filled steel tube pier bodies to be connected with the bent pier foundation and the bottom-layer prefabricated bent cap through the bolts, and the steel square keys are arranged at swinging joint portions. Under a strong earthquake, the bottom layer of the double-deck bent pier shakes, and the unbounded prestressed tendons provide self-resetting capability. Earthquake damage is concentrated in the energy-dissipation angle steel with the vertical joints, and the energy-dissipation angle steel with the vertical joints can be replaced when damaged after the earthquake and becomes fuses in the structure.

The invention relates to a lift-mounting tool and a using method thereof. The tool is a rail-calibrating rule and comprises a straight strip rule body and a boot sleeve which is perpendicular to the rule body and is used for sleeving a guide rail. The construction also needs matching tools, such as a door side frame calibrating support, a frame calibrating line support and a rectangle protractor. The using method comprises the following steps: arranging the side plumb surface of the door side frame calibrating support on a side plumb vertical operation surface of a lift car sill, namely on a datum plane; arranging edges of the frame calibrating line support on a plumb surface dichotomizing a lift car in parallel to the datum plane and a centring gap, namely on a rail-calibrating surface; confirming the installation drawing size of the vertical surface of the lift car sill, namely the datum plane by the aid of a door frame calibrating support and two door side vertical lines thereof; confirming the installation drawing size of the rail-calibrating surface in parallel to the datum plane by the datum plane, the frame calibrating support and four accessory vertical lines; confirming the corresponding positions of a main rail, an auxiliary rail and other lift fittings according to the installation drawing sizes, the rail-calibrating surface, the rail-calibrating rule and the rectangle protractor. The invention has the advantages of simple structure and accurate measurement and improves the labor efficiency.

The invention provides a method for adjusting working clearances of antifriction bearings of a rolling device of a seamless steel tube cold rolling mill. According to the method, a standard plate, a 90-degree angle square, a bottom gasket, a top weight, a vernier caliper, a gauge and a filler gauge are adopted to form measurement tools. The standard plate serves as the measuring basis, the 90-degree angle square serves as a vertical check tool, the bottom gasket is used for supporting the end face of a lower side outer ring of a lower side bearing, and the top weight is pressed on the end face of an upper side outer ring. Three axial distances of the bearings are measured one by one from bottom to top through the vernier caliper or the gauge, the antifriction bearings are arranged upside down, and then distances between the bearing outer rings are measured one by one from bottom to top again. Measurement errors can be corrected through four measuring points and two times of measurement, the thickness of a spacer can be determined through computation, and the working clearances can be adjusted quickly and accurately.

The invention discloses a method for forming a large-diameter stainless steel square tube, and belongs to the field of processing and manufacturing of stainless steel seamless tubes. The method includes technological processes of raw material selecting, primary surface lubricating, tube end stripping, drawing head welding, primary drawing, primary pickling and degreasing, primary solid-liquid treatment, primary pickling, secondary surface lubricating, secondary drawing and head cutting, secondary pickling and degreasing, secondary solid-liquid treatment, straightening, secondary pickling, head flattening, dimension checking, ultrasonic flaw detection and packaging. Deformation in a drawing process tends to be alleviated, stabilizing time is short, and instability degree of an end surface is low. In addition, a formed product is high the dimensional precision and fine in flatness, and influence of the outer diameter of a circular tube billet is low before the product is formed.

The invention discloses a manufacturing method of a stainless steel square pipe. A forged round ingot is adopted as a pipe billet and subjected to hot extrusion, cold deformation, heat treatment and surface treatment to form a finished product. The method comprises the specific steps that 1, a semi-finished round pipe corresponding to the finished product in size is prepared from the stainless steel pipe billet through the seamless forming technology comprising hot extrusion and cold rolling/cold drawing; 2, a square pipe meeting size requirements is prepared from the semi-finished round pipe through a two-pass drawing method, wherein the first pass is sink drawing, and the second pass is short mandrel liner drawing; and 3, heat treatment is carried out, wherein a roller bottom type heat treatment furnace is adopted for the finished product for solid solution heat treatment, and the heat treatment process comprises four stages. The stainless steel square pipe can be applied to waste heat exhaust heat exchangers of third-generation nuclear reactors such as AP1000, CAP1000, CAP1400 and Hualong One, has the special section shape, high corrosion resistance, high surface smoothness and high boundary dimension precision and is required to pass strict ultrasonic flaw detection and liquid penetrating tests.

The present invention discloses a roughness detecting method for the combined surface of a concrete prefabricated part. The method comprises the following steps of 1) cleaning sundries on the surfaceof a to-be-measured part before the test, selecting a suitable area, painting a layer of demoulding oil on the selected area, and fixing a stainless steel square frame on the area; 2) filling the stainless steel square frame by adopting the plasticine to enabling the parallel and level state of the surface of the stainless steel square frame; 3) removing the stainless steel square frame, and taking down the plasticine attached on the surface of the part; 4) kneading the plasticine into a whole block, weighing the plasticine in the air as m1 and accurate to 0.01 g, placing the plasticine in a mesh basket, placing the plasticine in the distilled water together with the mesh basket, weighing the plasticine in the water as m2 and accurate to 0.01 g, and calculating the roughness of the plasticine. According to the roughness detecting method for the combined surface of the concrete prefabricated part, the roughness of the concrete prefabricated part, in the horizontal, vertical and inclineddirections, can be tested.

The invention relates to a waterproof node structure for a door-window cave. The waterproof node structure is arranged at the door-window cave and comprises an anchoring part, wherein a steel auxiliary frame is fixed on the door-window cave through the anchoring part, a JS waterproof coating layer is arranged at one side of the joint of the steel auxiliary frame and the door-window cave, and an external facing layer is arranged on the outer surface of the JS waterproof coating layer. The periphery of the external door-window cave is optimized into a full-concrete structure by virtue of a detailed design of a drawing, 20mm*40mm*1.6mm hot-dip galvanized steel square tubes are pre-buried into the side surface of the periphery of the cave in the construction process of a main body structure, are cut according to a door-window size discharging list, the anchoring part is welded to the square tubes, and two sides of the square tubes are blocked by virtue of polystyrene foam, so that the flow-in of the concrete is avoided; the square tubes are fixed with an aluminum alloy template by virtue of self-tapping screws and are poured into a main body structure together with the concrete, and the steel square tubes are pre-buried, so that the pollution, damage and corrosion caused by later-period civil construction to doors and windows are avoided, the formation of a leakage channel is completely eradicated, the construction quality is guaranteed, and meanwhile, the cost is saved.

The invention provides an assembly tool for a screw bearing of an automobile steering device. The assembly tool comprises an outer sleeve and an inner sleeve which is connected with the outer sleeve in a sliding way, wherein a flat bottom expansion hole is reserved on the upper part of a through hole of the inner sleeve; the orifice of the flat bottom expansion hole is provided with a chamfer; the outer sleeve is higher than the inner sleeve; the orifice of the higher end of the outer sleeve is provided with a chamfer; the chamfer part of the orifice of the outer sleeve and the chamfer port of the orifice of the inner sleeve form a feed hopper; a radial screwed hole is reserved on the lower part of the inner sleeve; an angle-square shaped groove consisting of an upper upright groove and a lower transverse groove is formed on the lower part, corresponding to the radial screwed hole of the inner sleeve, of the outer sleeve; and a locking screw is screwed into the radial screwed hole of the inner sleeve through the angle-square shaped groove on the outer sleeve. By using the assembly tool disclosed by the invention, a steel ball can automatically roll into each ball pocket of a retaining frame through the feed hopper which is formed by the orifices of the inner sleeve and the outer sleeve; and the steel ball can be wrapped in the outer sleeve by lifting the outer sleeve. The assembly tool has an ingenious design and a simple structure, and is convenient to use; moreover, the assembly time of the screw bearing is greatly reduced; and the product quality is stable.

The invention discloses a forging process of an engine crankshaft. The forging process includes the following steps: 1), for first fire, holding a bar by a pressing clamp, biting the bottom, upsetting and drawing; 2), for second fire, upsetting, drawing and performing number printing, wherein number printing depth is 120; 3), for third fire, using a 120-degree up-down V-shaped anvil to perform turn grinding, finishing and straightening, wherein grinding shift amount is 170; 4), pressing a turn (2), using an angle square to determine an angle, pressing a turn (3), and pressing a turn (1); 5), performing number printing, pressing out a bottom end small shaft (5), and pressing out a small shaft (4) between a flange and the turn (1); 6), rounding the flange to be in a process size, using the angle square to check relative angle of all turns after reaching the required size, using a wrench to adjust the relative angle of the turns by taking a middle turn as a reference, chamfering sides of each turn, finishing, straightening and completing. Metal fibers of a forged crankshaft are continuous and free of distortion, the forged crankshaft is high in quality, long in service life, few in tool aid input, high in additional value and obvious in economic benefit, and the forging process is applicable to forging production of various crankshafts.

The invention discloses a perpendicularity checking device for a roller stand angle square positioning gauge of a spinning machine.The device comprises a base, a detection plate, a left positioning assembly, a detection assembly, a right positioning assembly and the roller stand angle square positioning gauge; the detection plate is arranged on the base, a groove is formed in the middle of the upper end face of the detection plate, the left positioning assembly and the right positioning assembly are installed on the groove, and the detection assembly is arranged between the left positioning assembly and the right positioning assembly; the detection assembly is composed of a left detection rod, a right detection rod and a detection ruler; the roller stand angle square positioning gauge is arranged under the left detection rod and the right detection rod, and a plug gauge is arranged between the angle square end face of the roller stand angle square positioning gauge and the detection end face of the right detection rod.The device has the advantages of being simple in structure and convenient to operate and not only can ensure the precision and technique requirements of the roller stand angle square positioning gauge of the spinning machine but also can improve the flatting quality of main machine equipment in the textile industry.

The invention relates to a nonmagnetic soft stainless steel wire rod or stainless steel plate and a method of manufacturing the same. The stainless steel wire rod or stainless steel plate comprises the following components: C which is more than 0 percent and is less than or equal to 0.050 percent, Si which is more than 0 percent and is less than or equal to 1.00 percent, Mn which is equal to 8.00-15.00 percent, P which is less than or equal to 0.045 percent, S which is less than or equal to 0.030 percent, Cr which is equal to 13.00-18.00 percent, Ni which is equal to 4.00-8.00 percent, Cu which is equal to 1.50-4.00 percent and N which is more than 0 percent and is less than or equal to 0.050 percent. The method of manufacturing the nonmagnetic soft stainless steel wire rod or stainless steel plate comprises the following steps: A, steel billet is made by the alloy of the molten iron, the Cr, the Ni, the Mn and the Cu, and the steel billet is cast continuously into the stainless steel square billet or the stainless steel slab; B, heating the stainless steel square billet or the stainless steel slab to 1240-1260 DEG C and preserving the temperature of the stainless steel square billet or the stainless steel slab at 1240-1260 DEG C for 1.5-3 hours; C, rolling the stainless steel square billet into the stainless steel wire rod which has a diameter of 5.5-20 mm, or rolling the stainless steel slab into the stainless steel plate which has a thickness of 3-8 mm and a width of 1000-1300 mm; D, reeling the stainless steel wire rod or the stainless steel plate; and E, cooling the stainless steel wire rod or the stainless steel plate. The stainless steel wire rod or the stainless steel plate which is manufactured with the method has good cold processing performance and low cost.

The invention provides a device for quickly forming an orthodontic ligature wire. Two ends of a stainless steel side frame are respectively connected with stainless steel round wires; two stainless steel square wires the cross sections of which are in round rectangles are respectively positioned at the inner sides of the stainless steel round wires and are connected with the stainless steel side frame; the two stainless steel round wires and the two stainless steel square wires are mutually parallel; and a handle which is in the same direction with the stainless steel round wires and is connected with the stainless steel side frame in the vertical direction is arranged at the middle part of the other side of the stainless steel side frame. The tip of the ligature wire formed by the invention is in a semicircle (about 2mm), thus the ligature wire can be conveniently hung on a hook with a ring in the back ligaturing process of canine teeth. When a bracket is ligatured, an approximately square part in the middle of the formed ligature wire is arranged parallel to an arch wire and is placed below a bracket wing and then pulled to the other direction along the traveling direction of the arch wire, so that the ligature wire can be placed below the bracket wing for ligaturing.

The invention discloses a thin wall stainless steel taper angle square or rectangular pipe and the production equipment thereof. Four angles of the thin wall stainless steel taper angle square or rectangular pipe are all taper angles and substantially identical, thus the interchangeability is good when the pipes are butted. The production equipment and process route for manufacturing the thin wall stainless steel taper angle square or rectangular pipe adopt the following steps that at least a first plain barreled roll machine frame, a second vertical edging roll machine frame, a third plain barreled roll machine frame, a fourth vertical edging roll machine frame, a fifth plain barreled roll machine frame, a sixth Turkish head machine frame, a seventh Turkish head machine frame and an eighth vertical edging roll machine frame are installed and arranged in sequence, circular hole type rollers are installed in the plain barreled roll machine frames and the vertical edging roll machine frames in front of the Turkish head machine frames, four square or rectangular hole type rollers mutually positioned with the rollers are respectively installed in the two Turkish head machine frames, and a square or rectangular hole type roller is installed in the vertical edging roll machine frame installed at the back of the Turkish head machine frames. The thin wall stainless steel square or rectangular pipe of the invention can be widely applied in fields of various construction and decoration projects.