388 results about "Mill scale" patented technology

The invention relates to the field of correction machining, in particular to a panel correction device for steel box girder machining, which comprises a machine body and a conveyor arranged at the front end of the machine body, and further comprises at least one supporting plate arranged on the machine body and close to the conveyor; the movable support is composed of two swing arms symmetrically hinged to the bottom of the supporting plate and a connecting frame connected with the two swing arms. Before a steel plate is gripped into the straightening roller, the polishing roller linked with conveying is used for automatically cleaning the upper surface and the lower surface of the panel, hard pollutants such as oxide skin and welding slag are thoroughly removed, the polished pollutants are blocked by the scraping plate, and the polishing efficiency is improved. Therefore, the problem that hard objects are pressed into the surface of the straightening roll to form pits and indentations under huge straightening pressure is fundamentally avoided, abrasion of the straightening roll is remarkably reduced, maintenance cost and time for frequently stopping for grinding or replacing the roll are reduced, meanwhile, the clean plate surface also prevents contaminants from scratching the surface of a subsequent workpiece, and the service life of the workpiece is prolonged. And the surface quality of the steel box girder finished product is improved.

The invention discloses an inner wall grinding and scraping device and method for condensation copper pipe manufacturing. The inner wall grinding and scraping device comprises a water receiving tank, a vertical rod is fixedly connected to the center of the interior of the water receiving tank, two rotating mechanisms are installed on the vertical rod, and a fixing disc is fixedly connected to the top of the vertical rod; a through hole is formed in the fixed disc, and a winding mechanism which is arranged on the periphery of the fixed disc and can ascend and descend is installed on one rotating mechanism. A steel wire reinforced hose is wound in the winding mechanism, the water outlet end of the steel wire reinforced hose is connected with an inner wall grinding and scraping assembly, and a steel wire twisting assembly located below the fixing disc is installed on the other rotating mechanism. The problems that in the manufacturing process of the condenser pipe, oxide skin and oil dirt on the inner wall of the pipe are difficult to scrape off due to lack of effective technical means, and then the heat transfer performance of the condenser pipe and the operation performance, energy consumption, equipment service life and reliability of a refrigerating and heating system are affected are solved.

The present invention relates to the technical field of hot stamping steel. Disclosed is a soaking-type stamping method and apparatus for hot-formed steel, comprising the following steps: step 1: transporting a prepared blank into a furnace chamber for austenitizing heating, the blank being made of a hot-formed steel material; and step 2: immersing a lower forming punch into a liquid medium within a tank assembly, and placing the heated blank onto a material support frame by means of a loading manipulator, the tank assembly being internally provided with the liquid medium. A soaking-type stamping method is used in the present invention, which, compared to the direct hot-forming method in the prior art, optimizes the structure of a mold, reduces the machining of water channels in hot stamping devices of the prior art, and shortens the processing cycle and reduces costs while broadening the applicable range of materials, solving the issue of oxide scale on uncoated plates and the lime problem of galvanized steel plates, and having low investment costs and being easily controlled for automation.

The invention belongs to the technical field of surface treatment, and particularly relates to a wide and thick plate rolling mill high-toughness stainless steel lining plate manufactured through laser cladding and a preparation method of the wide and thick plate rolling mill high-toughness stainless steel lining plate. The functional layer alloy powder of the lining plate comprises the following components in percentage by mass: 10%-15% of (Ti, W) C composite powder and the balance of iron-based alloy powder, wherein the iron-based alloy powder comprises the following components in percentage by mass: 0.1%-0.2% of C, 11%-13% of Cr, 0.2%-0.4% of Si, 0.2%-0.4% of Mn, 8%-10% of Ni, 1.0%-1.3% of Mo, 1.0%-1.5% of Al, 0.3%-0.5% of Nb, 0.3%-0.5% of Zr and the balance of iron. After a special coating material is adopted for cladding the plate surface, the impact resistance, the oxidation skin pricking resistance and the oxidation skin abrasive wear resistance of the plate surface under large rolling force can be improved, and the service life of the lining plate is prolonged; and a laser composite manufacturing method is adopted, so that the production cost of an enterprise can be reduced while the service life is ensured.

The utility model discloses a multi-stage descaling treatment device for the surface of a steel strip in a finish rolling area of a hot rolling line. The multi-stage descaling treatment device comprises a rack, a conveying roller, a high-pressure water descaling mechanism, a steam descaling mechanism, a suction mechanism, a finish rolling unit and a runner, the plurality of finishing mill groups are uniformly distributed, and the rack is mounted between the adjacent finishing mill groups; the conveying roller is rotationally connected to the rack, the high-pressure water descaling mechanism and the steam descaling mechanism are installed on the upper side and the lower side of a steel belt, and the high-pressure water descaling mechanism is located on one side of the steam descaling mechanism; the suction mechanisms are positioned at two ends of the steel belt; the runner is fixed at the bottom of the rack; according to the utility model, the steel belt is impacted by high-pressure water, so that oxide skin on the steel belt can be washed away; the steam can quickly blow off water staying on the surface of the steel strip, so that the influence of large flow of the high-pressure water on the temperature reduction of the steel strip is reduced, and meanwhile, residual oxide skin can be blown off to improve the descaling effect.

The invention discloses a preparation method of a high-quality solid welding wire. The preparation method comprises the following steps of S1, raw material selection and pretreatment, S2, a drawing forming process, S3, surface treatment, S4, aftertreatment and finishing, S5, quality detection and control and S6, packaging and storage. Before work starts, raw materials are selected, low-carbon steel is selected, the purity of S is controlled to be smaller than or equal to 0.010%, the purity of P is controlled to be smaller than or equal to 0.015%, the size is controlled to be phi 5.5-6.5 mm, then oxide skin is removed through sulfuric acid for 5-10 min, after flushing is conducted through high-pressure water, residual acid is neutralized through alkali liquor, corrosion is prevented, then hot air drying is conducted at the temperature of 100-120 DEG C, it is guaranteed that no water exists on the surface, and the low-carbon steel is obtained. According to the method, the raw materials are pretreated, so that the cleanliness of the raw materials is improved, the production quality of the thick solid welding wire is improved, then the raw materials are smelted after being pretreated, and then a mixture of rare earth, deoxidized silicon, alloy vanadium and copper phosphorus tungsten carbide is added according to different environment requirements so as to increase the variety of the welding wire.

The invention discloses copper-aluminum ingot containing barrel heating pipe forging equipment, and belongs to the field of copper-aluminum machining, the copper-aluminum ingot containing barrel heating pipe forging equipment comprises a base and a forging and pressing part, the base is connected with a synchronous translation assembly, the synchronous translation assembly is fixedly connected with a material turning driving part and a vibration matching assembly, and a rotating shaft of the material turning driving part is fixedly connected with a clamping fixing part; an insertion part is clamped and fixed at the clamping end of the clamping and fixing part; the movable column axially moves in the inserting rod in a reciprocating mode to generate vibration, the vibration is conducted to a heating pipe base body outside the inserting rod through the inserting rod, instantaneous impact force generated by the vibration can destroy a bonding interface between oxide skin and base body metal, adhesive force is reduced, micro cracks are generated on the bonding interface between the oxide skin and the base body, and the service life of the heating pipe is prolonged. After multiple times of overturning and oscillation, the cracks can expand and converge, so that the oxide skin is layered and peeled off, the loose oxide layer on the outer surface of the base body is peeled off, and the situation that the forging head and a workpiece are isolated by the oxide skin, and consequently the base body has defects is avoided.

The invention relates to the technical field of nodular cast iron and an annealing method thereof, and discloses an annealing method for improving elastic modulus and strength of nodular cast iron and application, the annealing method comprises the following steps: first-stage annealing and high-temperature decomposition: heating to 880-980 DEG C along with a furnace, and preserving heat for 15-36 hours; second-stage annealing and low-temperature graphitization: cooling to 650-860 DEG C, preserving heat for 3-5 hours, and then quickly discharging from the furnace for air cooling; and performing surface treatment: performing shot blasting to remove oxide skin to obtain the nodular cast iron material. According to the scheme, the nodular cast iron material is prepared from the following raw materials in percentage by mass: 1.8 to 2.3 percent of C, 1.3 to 2.2 percent of Si, 0.3 to 0.7 percent of Mn, 0.002 to 0.005 percent of Bi, 0.002 to 0.01 percent of Sb, less than 0.06 percent of P, less than 0.2 percent of S and the balance of Fe. Compared with the prior art that two-stage annealing (such as furnace cooling to 595-635 DEG C after 900-950 DEG C treatment and heat preservation) needs to be matched with special components such as high rare earth and high phosphorus, the steps are complex and the cost is high, the phosphorus content and the rare earth content of the material in the scheme are low, the elastic modulus and the tensile strength of the nodular cast iron can be effectively improved by adding a proper amount of nodulizing agent, the production process is simplified, and the production cost is reduced. And the cost can be reduced.

Provided are a method for controlling the amount of scale formation of a metal material, an apparatus for controlling the amount of scale formation, and a method for operating a heating furnace, for controlling the amount of scale formation within an appropriate range when it is desired to reduce the amount of carbon dioxide emission by using hydrogen and ammonia as fuel gas for a heating furnace for heating a metal material. A method for controlling the scale generation amount of a metallic material in a heating furnace, in which a hydrogen-based gas having hydrogen and / or ammonia as the total amount is used as a fuel, the metallic material is heated by a burner, and the flow rate of the hydrogen-based gas used for the fuel heated by the burner is set as an operating parameter of the heating furnace. The amount of scale generated on the surface of the metal material is controlled on the basis of the set flow rate of the hydrogen-based gas. Furthermore, it is preferable that at least one of the heating time and the heating temperature of the metal material in the heating furnace be further set as the operating parameters of the heating furnace.

The invention discloses a nondestructive testing method for the thickness of oxide scale on the surface of thin-gauge strip steel, and belongs to the technical field of metal material surface detection.The nondestructive testing method comprises the steps that S1, plate shearing and carbon powder composite sample preparation are conducted, specifically, firstly, the thin-gauge strip steel is cut through a plate shearing machine to obtain a strip steel sample, then the strip steel sample and carbon powder are mixed, and finally hot inlaying treatment is conducted; s2, multi-angle progressive grinding and polishing are conducted, and in the grinding and polishing process, the sample is rotated by 20 + / -5 degrees every time the abrasive paper is replaced; s3, gray scale and depth-of-field two-parameter analysis: firstly, based on the gray scale difference among the carbon powder, the strip steel substrate and the oxide layer, carrying out regional distinguishing on the carbon powder, the strip steel substrate and the oxide layer; acquiring depth-of-field parameters for different areas; and finally, obtaining the thickness of the oxide layer according to the difference value of the three depth-of-field parameters. Through the synergistic effect of the sample preparation technology, the grinding and polishing technology and two-parameter analysis, the detection precision is improved, and meanwhile the detection efficiency is improved.

The utility model relates to the field of shot blasting equipment, in particular to a shot blasting device for removing oxide skin on the surface of steel, which comprises a power component and a shot blasting chamber, a support roller component and a mounting frame are arranged in the shot blasting chamber, a plurality of shot blasting pipes are uniformly mounted on the mounting frame, and a screening bin is rotatably arranged below the power component. The power assembly is provided with a steel wire hose inserted into the screening bin, the lower end of the power assembly is provided with a reciprocating rotating mechanism connected with the screening bin, the power assembly is provided with a conveying hose connected with the shot blasting pipe, and a discharging opening is formed in the lower end of the shot blasting chamber and provided with a discharging pipe extending to the position below the power assembly. The end of the discharging pipe is connected with a hose connected with the screening bin, and a collecting disc is arranged below the power assembly. The shot blasting machine disclosed by the utility model has the effect of screening oxide skin mixed in shot blasting.

The application discloses a hot-rolled seamless steel pipe descaling device and method, and relates to the field of hot-rolled seamless steel pipe descaling devices. The hot-rolled seamless steel pipe descaling device comprises a base, a fixed plate, a rotating disc, a linear driving mechanism arranged on the base, a rotating mechanism, an inner supporting mechanism and a descaling assembly arranged on the base. The fixed plate is installed on the base and is suitable for being driven to move forward and backward on the base. The rotating disc is rotatably connected to the fixed plate. The linear driving mechanism is connected to the fixed plate to drive the fixed plate to move linearly. The rotating mechanism is installed on the fixed plate and connected to the rotating disc to drive the rotating disc to rotate. The inner supporting mechanism is installed on the rotating disc and is suitable for partially extending into the inner cavity of the steel pipe and supporting and limiting the inside of the steel pipe. The descaling assembly is located below the steel pipe supported by the inner supporting mechanism. The oxide scale is stripped by high-pressure water horizontal injection in a non-radial manner to impact the surface of the steel pipe, so that the impact on the base material of the steel pipe is reduced.

Provided are a hot-rolled non-oriented electrical steel sheet and a manufacturing method thereof, in which shot balls are projected onto the steel sheet in the manufacturing process to remove scale, and the surface and internal hardness is adjusted after the shot ball projection, thereby improving iron loss in all directions and iron loss after stress relief annealing. The hot-rolled non-oriented electrical steel sheet of the present invention contains, by weight %, 2.8 to 4.0% Si, 0.1 to 1.3% Al, 0.3 to 2.0% Mn, and the balance being Fe and unavoidable impurities, and satisfies the following formula 1: [Formula 1] 1.1≦Hv1 / HV2≦1.5 (In Equation 1, HV1 represents the hardness measured on the surface of the steel plate, and HV2 represents the hardness measured at a point halfway through the thickness of the steel plate.) It is characterized by further containing one or more of Cr: 0.2 wt % or less (excluding 0%), Sn: 0.06 wt % or less (excluding 0%), and Sb: 0.06 wt % or less (excluding 0%).

This invention relates to the field of welding technology, specifically disclosing a low-temperature welding method for thin-walled plates used in lightweight automotive components. The welding method includes the following steps: S1: Raw material preparation, taking raw material, preparing a constant-temperature welding chamber and welding equipment, and a heating gun; S2: Raw material transfer, placing the raw material and welding equipment in the constant-temperature welding chamber; S3: Raw material cleaning, grinding the welding area of ​​the raw material to remove dirt, oxide scale, etc. This invention avoids the problems of excessive temperature difference and rapid cooling rate during welding of thin-walled plates under low-temperature external conditions by setting a constant-temperature welding chamber and limiting its ambient temperature to no lower than 0℃, preferably 7℃. Furthermore, the sealed constant-temperature environment ensures uniform and stable temperature in the welding space, preventing stress accumulation in the weld and base material due to environmental temperature changes, thereby reducing appearance defects such as warping, deformation, and wrinkles in the thin-walled plate.

The present invention relates to the field of steel processing, and in particular to an environmentally friendly dephosphorization machine for treating wire rod oxide scale. It comprises a frame, a heating and temperature control module, and a cooling module; the heating and temperature control module comprises a high-frequency heater and a temperature sensor, the high-frequency heater is fixed on the frame, and the temperature sensor is arranged behind the high-frequency heater; the cooling module is arranged behind the high-frequency heater; the cooling module comprises an overflow cooling water tank, and the overflow cooling water tank is provided with an inner tank, an outer tank, and a wire rod inlet and outlet that passes through the overflow cooling water tank. The environmentally friendly dephosphorization machine for treating wire rod oxide scale provided by the present invention utilizes the different expansion coefficients of the metal substrate and the oxide scale to make the oxide scale burst and fall off during thermal expansion and contraction, and heats the surface of the wire rod with high frequency, and then allows the wire rod to pass through cooling water, so that the oxide scale can be separated from the wire rod. The working process is simple and efficient.

The application discloses a segmented phase controlled root canal file and a preparation method thereof. The preparation method comprises the following steps: S1, precisely forming a root canal file blank by a nickel-titanium alloy grinding machine; S2, coarsely adjusting a phase ratio by a first vacuum heat treatment; S3, finely adjusting segmented phases by a second vacuum heat treatment; S4, locally quenching a rod part by high frequency; S5, removing defects by integral electrolytic polishing; and S6, multi-path tempering, including natural color, golden color and blue color grading. By means of the double vacuum segmented heat treatment for precisely controlling the phase ratio of the base body and the local quenching of the rod part, the working section can keep high flexibility, the rod part can obtain high hardness and super elasticity, and the core contradiction that the softness and the hardness cannot be considered simultaneously in the integral heat treatment can be solved at one time; after the local quenching, the electrolytic polishing process is arranged, so that the quenching oxide skin and intergranular microcracks can be completely removed, the surface roughness can be reduced, and the initiation source of fatigue cracks can be eliminated.

The utility model relates to the technical field of copper strip oxidation treatment, in particular to a special-shaped copper strip surface oxide skin treatment device. Comprising a working box body, a control panel is arranged on one side wall of the working box body, a liquid storage box is arranged in the working box body, a timer is arranged on the surface of one side of a supporting panel, a limiting sliding groove is formed in the surface of one side of the supporting panel, a threaded rod is arranged in the limiting sliding groove, and a movable sliding block is arranged in the limiting sliding groove. A ceramic placing box is arranged above the working box body, a honeycomb ceramic filter plate is embedded into the bottom of the ceramic placing box, a driving motor is arranged at the top of a supporting panel, two groups of movable sliding grooves are formed in the bottom end of the interior of the working box body, and two groups of movable sliding strips are arranged at the bottom end of a liquid storage box. According to the embodiment, the surface treatment quality of the copper strip is improved while the rust remover or the acid solution is prevented from being over-reacted with the copper strip.

The utility model relates to the technical field of metal processing, in particular to a black metal smelting rolled product oxide skin scraper which comprises a processing table, the surface of the processing table is fixedly connected with a fixing frame, a moving structure is arranged in the fixing frame, the bottom of a sliding block is fixedly connected with a connecting column, and the connecting column is fixedly connected with a sliding block. And a scraping structure is arranged at the bottom of the connecting column, a guide groove is formed in the surface of the machining table, two sets of protruding blocks are fixedly connected to the bottom of the machining table, a collecting box is slidably connected to the surfaces of the protruding blocks, and handles are fixedly connected to the surfaces of the two sides of the collecting box. According to the device, the moving structure and the scraping structure are arranged, different surfaces of a metal profile can be scraped without adjusting the angle of the metal profile, the device is convenient to use, the guide groove, the protruding block and the collecting box are arranged, oxide skin can be collected in a centralized mode, and the situation that the oxide skin is left on the surface of the machining table and influences machining is avoided.

Provided is a manufacturing method of a grain-oriented electrical steel sheet including preparing a hot-rolled sheet by hot-rolling a slab; removing some of scales formed on the hot-rolled sheet and leaving a scale layer having a thickness of 10 nm or more to prepare a hot-rolled sheet on which the scale layer remains; preparing a cold-rolled sheet by cold-rolling the hot-rolled sheet on which the scale layer remains; preparing the decarburization annealed cold-rolled sheet by decarburization annealing the cold-rolled sheet; coating an annealing separator on the decarburization annealed cold-rolled sheet to form a metal oxide layer; and final annealing the steel sheet on which the metal oxide layer is formed, wherein the annealing separator includes magnesium oxide (MgO) or magnesium hydroxide (MgOH) and fluoride.

This invention relates to an online method for preparing an anti-oxidation coating on the inner wall of a seamless steel pipe, comprising the following steps: placing a steel billet heated to 1000°C to 1300°C on a piercing platform; performing a first piercing by moving the mandrel relative to the steel billet; performing a second piercing on the steel billet after the first piercing; during the first piercing, when the mandrel is submerged in the steel billet, spraying anti-oxidation powder onto the inner wall of the steel pipe using a powder spraying device. Using this online method for preparing an anti-oxidation coating on the inner wall of a seamless steel pipe, anti-oxidation substances can be sprayed onto the inner wall of the steel pipe simultaneously with piercing, solving the technical problem of severe oxidation of the inner wall of the steel pipe during the piercing process through online preparation. This avoids the oxide scale generated damaging the quality of the inner wall of the seamless steel pipe in subsequent piercing processes, avoids the need for additional grinding processes, and even avoids the scrapping of the steel pipe.

This invention relates to the field of iron and steel metallurgy and proposes a method for controlling the corrosion-resistant iron oxide scale on the surface of hot-rolled steel plates. The method includes the following steps: First, molten steel is smelted and cast into steel billets; then, the steel billets are heated to 550-600℃ and held at an air-fuel ratio of 1.1-1.3 for 20-30 minutes; subsequently, the temperature is raised to 1100-1150℃ and held at an air-fuel ratio of 1.0-1.1 for 40-60 minutes; finally, the temperature is raised to 1180-1220℃ and held at an air-fuel ratio of 0.9-1.0 for 20-30 minutes to obtain the heated steel billet; the heated steel billet is then hot-rolled and cooled to obtain the steel plate. This technical solution solves the problems of uneven iron oxide scale growth and poor adhesion to the matrix in related technologies.

The application belongs to the technical field of metal heat treatment, and particularly relates to a continuous heat treatment device and method for a spinning pulley, which is aimed at the oxide scale carried on the workpiece which is easy to fall into the quenching liquid, and is mixed and suspended in the quenching liquid along with the sludge and colloid generated by the oxidation of the quenching oil, so as to cause the rapid accumulation of impurities in the quenching liquid, and thus frequent cleaning treatment of the quenching liquid is required, the heat treatment continuity is affected, and the workpiece heat treatment quality is affected. The following scheme is proposed, including a heat treatment frame. The continuous heat treatment device and method for the spinning pulley disclosed by the application have the effects of improving the heat treatment continuity and the workpiece heat treatment quality, the device can suck the quenching liquid in the sinking area of the workpiece in real time, so as to avoid the mixing and diffusion of the quenching liquid, thereby avoiding the rapid accumulation of impurities in the quenching liquid, and the sucked quenching liquid is rapidly treated and circulated, so as to ensure the long-time use performance of the quenching liquid.

The present invention relates to the field related to the processing of valve castings, and particularly to a surface treatment device for valve castings. The treatment process includes the following steps: S1 Surface cleaning: Clean the surface of the valve casting using an alkaline cleaner; S2 Pickling and rust removal treatment: Use an acidic solution to pickle the surface of the casting to remove the oxide scale and other impurities; S3 Surface roughness treatment: Perform grinding and processing through a grinding device; S4 Phosphating treatment: Perform phosphating treatment on the ground casting to form a phosphating film; S5 Primer coating: Apply a layer of polyurethane primer before spraying. The surface treatment process of the present invention can ensure that the surface of the valve casting is smoother by adopting processes such as pickling, grinding, phosphating, and primer coating, and improves the adhesion and corrosion resistance of the metal surface, providing a better foundation for subsequent coatings, thereby realizing more efficient treatment of the surface of the valve casting.

The application relates to the technical field of metal welding, and discloses a furniture metal sheet welding process based on a multi-section compression anti-warping structure, which comprises the following steps: S1, checking the sheet material, thickness and surface state, making the sheet material meet the requirements, and clearly defining the weld position and length; S2, using the methods of chemical cleaning, mechanical polishing and sand blasting to remove the oil stains, rust, oxide scale impurities on the surface of the metal sheet, making the surface expose the metal luster, and ensuring the welding quality. The furniture metal sheet welding process based on the multi-section compression anti-warping structure can effectively solve the problems in the prior art that plastic deformation is caused during the welding of the metal sheet, and then the sheet appears the warping phenomenon; the warping can make the welded metal sheet deviate from the originally designed size specification, causes the poor cooperation in the subsequent assembly process, increases the assembly difficulty and cost, and even causes the problem that the whole product cannot be normally assembled.

The application provides a preparation method of high-oxidation-resistance stainless steel for brake disc, and the process flow of the preparation method is as follows: molten steel obtained by refining general carbon molten iron is continuously cast, hot-rolled, covered and retreated, and pickled; the composition of the molten steel is controlled as follows: Mn 0.3-1.0%, Ni 0.1-0.3%, and Cu 0.10-0.25%; meanwhile, four passes of dephosphorization are simultaneously conducted in the hot-rolling process; meanwhile, in the covering and retreating process, pure nitrogen is selected as the protective gas of the covering and retreating process, the heating of the covering and retreating is controlled to 640 DEG C, and after a certain holding time, the heating is continued, the time of the high-temperature holding section is shortened, and the temperature after cooling is reduced, so that after the pickling, a dense passivation film is left on the surface of the stainless steel product after the removal of the oxide scale, the oxidation resistance of the stainless steel product is improved, and the proportion of the yellow material after quenching in the process of processing the stainless steel product into brake disc is significantly improved.

The present invention relates to the technical field of cleaning structures, and in particular to an auxiliary peeling and cleaning structure for metal rings processed by a ring rolling machine, comprising two relatively distributed air blowing units, which are sleeved on the metal ring; the air blowing unit comprises a rotating ring and a guide unit, and a plurality of support columns distributed circumferentially of the rotating ring, which rotate on the rotating ring, and the rotation axis of the support columns is perpendicular to the axis of the rotating ring, and each of the support columns is provided with a fixed arm; by adopting a method of airflow drilling into the gap between the oxide scale and the surface of the metal ring, the airflow breaks the outer support of the skin, thereby realizing the peeling work, and by utilizing the airflow in two relative directions, the peeling work of the skin that is warped in any direction can be realized.

This invention discloses a production method for 40-80mm thick Q420N series high-strength wind power equipment steel plates, comprising the following steps: Step 1: smelting and continuous casting; Step 2: slab heating; Step 3: high-pressure water descaling; Step 4: controlled rolling process; Step 5: cooling; Step 6: heat treatment, wherein the slowly cooled steel plate undergoes surface shot blasting to remove oxide scale, and then is subjected to a normalizing and weak water cooling process in a quenching furnace; the invention also defines the chemical composition of the Q420NE series steel plate by mass percentage. By optimizing the chemical composition design and coordinating controlled rolling and cooling processes, and adopting normalizing rapid cooling technology (NAC), this invention achieves a unified high strength, high toughness, excellent weldability, and thickness-direction uniformity in the steel plate without relying on a large amount of precious alloys, meeting the requirements of the harsh service environment of wind power equipment.

The hole wall polishing and finishing device comprises a machining table, a vertical plate is fixedly installed at the top of the machining table, a finishing tool used for polishing the hole wall of a casting is fixedly arranged on the front face of the vertical plate, and a cleaning mechanism used for cleaning oxide skin in the hole wall of the casting is arranged on the portion, on the front face of the vertical plate, of the machining table. The bottom of the machining table is provided with a recycling mechanism used for washing away chippings in the hole wall of the casting. The extending end of a first air cylinder is controlled to extend from half of the length to the longest length, so that a first piston enters a storage box, a cleaning agent conveniently enters a discharging pipe, then the extending end of the first air cylinder is controlled to contract to the shortest length, a second piston slides to the position below the input end of a first hose, and the cleaning agent conveniently enters a pressing sleeve along the first hose; and the cleaning agent in the storage box is prevented from leaking through the first piston, the cleaning agent only enters the hole wall of the casting to soak the inner wall of the casting, and oxide skin cleaning is facilitated.

The casting mechanism comprises a rack, a portal frame, an execution assembly, a material containing assembly, a material removing assembly and a cleaning box, the material removing assembly comprises a circular plate, a feeding port, a material shoveling piece, a baffle and a surrounding edge, the feeding port, the material shoveling piece and the baffle are arranged at the top of the circular plate, and the surrounding edge is installed on the outer side of the top of the circular plate; according to the material removing device, the material removing assembly is arranged and driven by the execution assembly, the distance between the material shoveling piece and the liquid level of molten aluminum can be accurately adjusted, the impurity removing requirements of different liquid level heights are met, the driving piece drives the circular plate to rotate, the material shoveling piece is driven by the baffle to shovel oxide skin through the feeding opening, and the material shoveling piece is driven by the baffle to shovel the oxide skin through the baffle and the surrounding edge. The three material shoveling pieces distributed in a surrounding mode synchronously shovel the oxide skin through the feeding port, the included angle of the shoveling face ranging from 15 degrees to 30 degrees is matched, the impurity removing efficiency is greatly improved, it is guaranteed that the oxide skin is thoroughly removed, manual close-distance operation is not needed, and automatic oxide skin removing is achieved.

This invention discloses a method for preparing high-elongation bars for cold forging, belonging to the field of aluminum alloy preparation technology. Through optimization of composition and process, the prepared bars possess high purity, uniform and fine equiaxed grain structure, and excellent plasticity, with significantly improved elongation. This meets the stringent requirements of cold forging for high material plasticity, resulting in a bright, crack-free surface and uniform grains after cold forging, overcoming problems such as oxide scale, coarse grains, and poor dimensional accuracy caused by hot forging. Furthermore, the introduction of modified talc and sodium nitrate as refining agents further promotes uniform microstructure, achieving high elongation and excellent cold forging performance.