1346 results about "Thin slab" patented technology

The invention discloses a method for rolling a TA21 titanium alloy sheet. The method comprises the following steps: 1, coating the surface of a TA21 titanium alloy plate blank with an anti-oxidation coating; 2, rolling for the first heating number; 3, cutting treatment; 4, rolling for the second heating number; and 5, cutting. 6, quenching treatment; 7, rolling for the third heating number; 8, cutting treatment; 9, annealing the semi-finished product; 10, cold rolling; and 11, annealing a finished product. According to the method, first two-heating-number rolling is carried out in a two-phase region, coarse beta grains are formed in combination with quenching and heat preservation, a long-strip-shaped alpha phase is separated out from a coarse beta phase through rapid water cooling to form a needle-shaped widmannstatten structure, then one-heating-number reversing large-deformation rolling and cold rolling are carried out in the two-phase region, a large number of structures are crushed and refined, the needle-shaped widmannstatten structure is spheroidized, and the needle-shaped widmannstatten structure is obtained. The TA21 titanium alloy thin plate with fine and uniform tissue is obtained, the plate blank is fully utilized, and the production efficiency is greatly improved.

The invention discloses a one-time forming submerged-arc welding method for butt joint of marine steel thin plates, which comprises the following steps of: flatly laying the thin plates needing to be in butt joint on a welding platform, and adjusting a butt gap between the thin plates needing to be in butt joint; welding and fixing run-on plates at the two ends of the weld bead, not forming grooves in the four sides of each run-on plate, and keeping the plate thickness and the material consistent with the base material; a liner is fixed to the back face of the welding bead, the liner is a ceramic liner, a groove is formed in the middle of the ceramic liner in the length direction and located below a welding seam of the steel plate to be welded, and the ceramic liner on the two sides of the groove is tightly attached to the thin plates on the two sides of the welding bead; a submerged arc welding machine walking trolley track is laid on one side of the welding bead, and one end of the welding bead is welded through a welding machine; after welding is completed, welding coatings on the welding front face are removed, ceramic gaskets on the welding back face are removed, and air cooling is conducted for natural temperature; wherein the thickness of the marine steel thin plate is 6-12mm. According to the method, electric arcs are dispersed, heat input is reduced, thermal deformation is reduced, and a welding seam is formed at one time.

The invention discloses a machining technology for an arc plate. The machining technology comprises the following steps that S1, an arc-shaped mold is manufactured; s2, machining a to-be-machined part, wherein a plurality of thin plates are sequentially stacked and attached to form the to-be-machined part, and the thickness of the to-be-machined part is the same as that of the needed arc plate; s3, pressure maintaining and shaping are conducted, specifically, the arc-shaped mold is placed in a sealing box, then a to-be-machined part is placed on the arc face of the arc-shaped mold, a flexible sealing cover of the sealing box covers the arc-shaped mold, and then an air pressure difference is formed between the inner side and the outer side of the flexible sealing cover; and the flexible sealing cover deforms and extrudes the to-be-machined part under the action of the air pressure difference so that the to-be-machined part can be completely attached to the arc face of the arc-shaped mold, the attaching state can be kept for a preset duration, and an arc plate matched with the arc face in radian can be formed. The problems that the surface of a product is uneven, irregular in radian and distorted due to the fact that an upper die and a lower die need to be matched in an existing arc plate machining process are solved.

The invention relates to the technical field of alloy steel, in particular to 590MPa-grade short-process hot-dip galvanized low-density steel and a preparation method thereof. The high-strength steel is composed of the following chemical components in percentage by weight: 0.06%-0.11% of C, 0.5%-0.8% of Si, 0.7%-1.15% of Mn, 0.01%-0.04% of P, less than or equal to 0.03% of S, 3.0%-5.8% of Al, 0.01%-0.05% of Ti, 0.001%-0.004% of N and the balance of Fe and inevitable impurities. The technological process comprises the steps of smelting, medium and thin slab continuous casting and rolling, acid pickling, cold rolling and hot galvanizing. The hot-dip galvanized low-density steel has the tensile strength of more than 590 MPa and the elongation of more than 25%, is low in cost, simple in process and low in production difficulty, and can meet the requirements of environmental protection, energy conservation and emission reduction.

The invention discloses a near-net-shape endless rolling non-oriented electrical steel ultra-thin strip and a preparation method thereof, and belongs to the technical field of metal processing. According to the method, the near-net-shape endless rolling non-oriented electrical steel ultra-thin strip with the finished product thickness being only 0.05-0.15 mm is prepared through the processes of smelting, thin slab continuous casting, endless rolling hot continuous rolling, coiling, online heat preservation, acid pickling, primary cold rolling and continuous annealing, normalizing and secondary cold rolling annealing are not needed in the process, and short-process, low-cost and efficient production can be achieved. The defects that the surface of the non-oriented electrical steel ultra-thin strip is corrugated, the magnetic performance is poor, the surface is scratched and severely narrowed in the annealing process, iron loss is not easy to control, and energy consumption is high are overcome, and the prepared non-oriented electrical steel ultra-thin strip is excellent in magnetic property and can be applied to high-frequency and high-speed motors. And the development requirements of new energy and low-altitude economy are met.

The invention relates to a cabinet body structure processing device for high-voltage cabinet production, which comprises a processing rack, a displacement box mounted at the upper end of the processing rack, a sliding seat arranged on the surface of the displacement box, a welding assembly arranged below the sliding seat and displacement racks arranged at the two ends of the processing rack, and a displacement frame is arranged between the two displacement racks; the displacement frame is used for clamping and turning over a high-voltage cabinet body, an outer moving frame and an inner positioning frame are arranged on the displacement frame, an outer clamping assembly is arranged on the outer moving frame, and an inner clamping assembly is arranged at the upper end of the inner positioning frame; by arranging a multi-point internal and external cooperative clamping and supporting structure, bidirectional mechanical constraint on a thin plate cabinet body in the whole welding process is achieved, the limiting effect on a plate body is improved, meanwhile, a pressing assembly is driven in the working process of a welding gun, angular deformation and wave deformation caused by thermal expansion and cold contraction are effectively restrained, and the welding quality is improved. The diagonal deviation control quantity of the cabinet body is small, and the assembly precision and the sealing performance between the door body and the cabinet body are improved.

The invention belongs to the technical field of thin plate laser welding, and particularly relates to a curved-surface thin plate laser welding device which comprises a welding base. A first supporting frame is arranged on the welding base. The upper fixing base and the lower fixing base are matched with a plurality of short rods to adaptively clamp different types of curved-surface thin plates, and are matched with two laser welding heads to perform double-sided welding, so that the effect of performing counterpoint double-sided laser welding on the different types of curved-surface thin plates is achieved, traditional laser equipment which is difficult to perform double-sided counterpoint welding on the curved-surface thin plates is replaced, and the production efficiency is improved. The multiple short rods on the upper fixing base and the lower fixing base can conduct adaptive clamping according to the curved surface shapes of the thin plates, the welding precision and stability are improved, welding deviation caused by the irregular curved surface shapes of the thin plates is avoided, the two oppositely-arranged laser welding heads can flexibly move to the upper and lower opposite seams of the two curved surface thin plates, and the welding quality is improved. And laser double-face simultaneous welding is achieved, the welding efficiency is improved, a welded joint is firmer, and the overall welding quality is improved.

The invention belongs to the technical field of welding, and provides a laser welding tool and method for a thin-wall titanium alloy runner plate. A small-diameter welding wire is adopted, the laser power is adjusted, protective gas purging is started, and laser welding is conducted in the anticlockwise direction from the left lower portion; in the welding process, active cooling is carried out at the same time until welding is completed; after welding is completed, the fixing module is detached; the active cooling specifically comprises the steps that absolute ethyl alcohol is sprayed on the welded surface, after absolute ethyl alcohol on the surface of the cold plate (3) to be welded volatilizes completely and ventilation is kept for 2 min, protective gas is started again for purging for 10 s, and one-time active cooling is completed. The method is used for solving the problem that a laser welding method in the prior art easily causes heat accumulation deformation of the titanium alloy sheet, so that the welding precision of the sheet is ensured.

The novel titanium basket cover plate device comprises a titanium basket cover plate body, a plurality of sets of installation guide grooves are formed in the upper surface of the titanium basket cover plate body, a reinforcing guide strip is embedded in each set of installation guide groove, and the reinforcing guide strips are arranged in the installation guide grooves. According to the novel titanium basket cover plate body, the reinforcing guide strips are used for increasing support, so that a thin plate can pass through the center positions of an upper titanium basket and a lower titanium basket, the distance between the plate and the upper titanium basket and the distance between the plate and the lower titanium basket are approximately equal, it is ensured that electroplated and separated metal copper is evenly attached to a cathode plate (a PCB), and therefore the production efficiency is improved; the improved titanium basket cover plate device can more effectively control the up-and-down fluttering range of a plate in a copper cylinder and the guiding effect, so that product damage caused by collision of a spray pipe, a nozzle and the like is reduced, the rejection rate is further reduced, the plate corner of a thin plate cannot collide with a wheel and a cover plate hole position, and plate corner deformation is avoided.

The invention belongs to the technical field of cold-rolled oriented electrical steel strip manufacturing, and particularly relates to a low-noise cold-rolled oriented electrical steel strip for a transformer, a preparation method of the low-noise cold-rolled oriented electrical steel strip and the transformer. The method comprises the following steps: heating a sheet billet to obtain a heated sheet billet, carrying out hot continuous rolling on the heated sheet billet to obtain a hot-rolled sheet, and sequentially carrying out normalizing pickling, primary cold rolling, decarburization annealing, secondary cold rolling, MgO separant coating, cover type high-temperature annealing, stretching leveling and insulating coating on the hot-rolled sheet to prepare a finished oriented electrical steel strip with the thickness of 0.15-0.20 mm, the slab comprises the following chemical elements in percentage by mass: 0.02% < = C < = 0.08%, 2.50% < = Si < = 3.20%, 0.10% < = Mn < = 0.50%, 0.02% < = P, 0.05% < = Als < = 0.15%, 0.10% < = Cu < = 0.50%, 0.05% < = Sb < = 0.15%, 0.005% < = S < = 0.015%, 0.005% < = N < = 0.015%, 0.004% < = Ti and the balance of Fe and inevitable impurities. The iron loss P1.7 / 50 of the cold-rolled oriented electrical steel strip finished product prepared by the method is less than or equal to 1.00 W / kg, the iron loss B8 is greater than or equal to 1.94 T, and the test noise of a transformer manufactured by the steel strip at a position of 3m is less than 15dB.

The invention relates to the technical field of welding equipment, and discloses an automatic welding turnover device which comprises a supporting frame, a circular plate, a guide rail pair, a first stepped shaft, a second stepped shaft, a first driving part, a second driving part and a third driving part. The supporting frame comprises two first rotating shafts which can move in the axial direction of the supporting frame and rotate around the axis of the supporting frame. Each guide rail pair comprises a first moving seat and a second moving seat which move in the radial direction of the circular plate. In the using process, two circular pipelines, two semicircular pipelines and a pipeline which is formed by bending a thin plate and provided with only one welding seam in the side wall can be clamped and fixed. In addition, due to the fact that the positions of the multiple first stepped shafts and the multiple second stepped shafts can be adjusted in the radial direction of the circular plate, the pipeline clamping and fixing device can be suitable for clamping and fixing work of pipelines of different sizes. Meanwhile, the multiple first stepped shafts and the multiple second stepped shafts are fixed in the mode of clamping the side wall of the pipeline, and compared with a pressing and fixing mode, when the pipe wall is thin, deformation can be avoided.

The invention provides a rapid connection system for aluminum alloy sheets, and relates to the field of material connection, the rapid connection system comprises a conveying assembly, a shearing assembly, an auxiliary lifting assembly, a sensing system and a heating device, the conveying assembly is composed of two conveying mechanisms, the shearing assembly is arranged between the two conveying mechanisms, and each conveying mechanism is composed of a plurality of conveying rollers; the shearing assembly comprises an upper shearing head and a lower shearing head, and shearing grooves are formed in the middle of the bottom face of the upper shearing head and the middle of the top face of the lower shearing head correspondingly. The auxiliary lifting assembly is arranged on the outer sides of the two conveying rollers of one conveying mechanism and comprises two auxiliary lifting rollers and a lifting device. The sensing system is arranged corresponding to the shearing assembly. According to the system, rapid and efficient connection between the aluminum alloy sheets can be achieved, real-time monitoring can be conducted through intelligent sensors such as a temperature sensor and a pressure sensor in the connection process, and the problem of connector defects caused by the external environment is solved.

The invention discloses a preparation method of a high-strength 5000 series aluminum alloy sheet for anodic oxidation. An aluminum ingot, an aluminum intermediate alloy ingot and electrolytic aluminum water are used as raw materials, and the high-strength 5000 series aluminum alloy sheet for anodic oxidation is prepared through the steps of smelting, casting, homogenization treatment, hot rolling, cogging cold rolling, intermediate annealing, finished product low-temperature cold rolling, stress relief annealing, cleaning, straightening and trimming and finished product shaft splitting. The tensile strength of the aluminum alloy material with the thickness of 0.5-2.0 mm is larger than or equal to 280 MPa, the yield is larger than or equal to 240 MPa, and the ductility is larger than or equal to 8%. The grain size of any position of the surface of the obtained final product is smaller than or equal to 30 microns, the grain aspect ratio is 1.0-1.6%, it can be guaranteed that no material lines and different color lines appear on a 150 # zircon sand blasting anode, and the requirements for high-strength punch forming and anodic oxidation of the product are met.

The invention relates to the technical field of intelligent manufacturing equipment industry, in particular to a length-adjustable cutting device for aluminum profile machining, which comprises an intelligent manufacturing workbench, a gear disc rotationally clamped outside the top end of one side of the intelligent manufacturing workbench, and a central shaft slidably clamped in the middle position in the gear disc in a penetrating manner, according to the aluminum profile cutting device for the intelligent manufacturing industry, the arranged inner supporting assembly is composed of a plurality of abutting thin plates and first electric telescopic rods, so that when a thin-wall tubular aluminum profile is cut, the first electric telescopic rods extend, the abutting thin plates expand outwards and are tightly attached to the inner wall of the aluminum profile, and uniform and stable inner supporting is formed; compared with a traditional two-point clamping and positioning mode, the inner supporting assembly can evenly disperse cutting force generated during saw blade cutting, the situation that local stress of the aluminum profile is too large is avoided, and the deformation problems of ovality out-of-tolerance, pipe opening wrinkling and the like caused by uneven stress of the thin-wall aluminum profile are greatly reduced.

The invention provides a positive and negative pressure pulse electric arc welding and additive manufacturing method which comprises the following steps: inducing electric arc plasma to generate a negative pressure electric arc with an anti-gravity adsorption effect through a current-magnetic field-hollow tungsten electrode-gas collaborative design, and forming a time sequence coupling process with a positive pressure electric arc. The core of the method is that a magnetic control positive pressure and negative pressure electric arc welding external field is cooperated with a molten pool reconstruction forming mechanism, that is, the dynamic and thermodynamic states of a molten pool are accurately balanced by dynamically switching the electric arc pressure direction and regulating and controlling the action proportion and alternating frequency of negative pressure and positive pressure electric arcs. A self-adaptive magnetic field threshold model based on current intensity and a gas mode is combined with variable polarity power supply parameters and gas flow rate cooperative control, and the problems of thin plate welding fusion penetration and thin-wall additive molten pool instability are effectively solved. According to the method, a welding wire, powder or laser composite manufacturing mode can be integrated, the forming precision and performance of a complex structure are remarkably improved, and an innovative technical support is provided for high-quality and high-efficiency welding and additive manufacturing.

A manufacturing method for a non-oriented silicon steel sheet, comprising the working procedures of slab continuous casting, slab heating, intermediate slab manufacturing, surface treatment, slab assembly, heating, hot rolling, no normalizing, acid pickling, cold rolling, annealing, coating and the like, and further comprising a coiling procedure before or after the cold rolling procedure. In the surface treatment procedure, the intermediate slab enters a tunnel furnace to be subjected to high-temperature reduction heat treatment in a reducing atmosphere of 90％H2+10％H2S, the temperature is maintained at 950-1000℃, and the temperature is maintained for15-30 min; and a single-layer non-oriented silicon steel finished product having a thickness of 0.15-0.30 mm is manufactured without normalizing.

The utility model discloses a sheet metal processing device capable of realizing continuous production, relates to the technical field of sheet metal processing devices, and aims to solve the problems that an existing sheet metal processing device performs processing in a manner of stamping two sheet metal at one time, but even if two sheet metal are processed at one time, the processing continuity is still poorer, and the processing efficiency is high. The sheet metal machining device comprises a device base, a machining table is arranged at the upper end of the device base, the machining table and the device base are of an integrated structure, a horizontal guide groove is formed in the machining table, and a top bracket is arranged above the horizontal guide groove; the movable module is movably arranged in the horizontal guide groove, a thin plate containing groove is formed in the movable module, a metal thin plate is placed in the thin plate containing groove, a connecting inserting groove and a butt-joint inserting block are arranged at the two ends of the movable module respectively, and the connecting inserting groove and the butt-joint inserting block are both of an integrated structure with the movable module.

The invention belongs to the technical field of thin plate welding part laser welding, and particularly relates to a thin plate welding part laser welding auxiliary device and a welding method.The thin plate welding part laser welding auxiliary device comprises a welding auxiliary positioning plate, and clamping frames are slidably mounted at the two ends of the upper surface of the welding auxiliary positioning plate; clamping assemblies are arranged in the two clamping frames correspondingly, two mounting plates are symmetrically fixed to the front side wall and the rear side wall of the welding auxiliary positioning plate correspondingly, a lifting assembly is fixedly mounted on the upper surfaces of the four mounting plates jointly, the upper end of the lifting assembly is sleeved with a lifting plate, a movable adjusting assembly is arranged on the upper surface of the lifting plate, and a middle groove plate is slidably clamped in the lifting plate. A movable mounting block is slidably clamped in the middle groove plate, and a laser welding mechanism is fixed to the lower end of the movable mounting block. According to the thin plate welding device, to-be-welded thin plates with different thicknesses and different lengths can be rapidly and stably clamped, and rapid and accurate welding of the thin plates can be achieved.

The invention relates to low-density steel based on short-process hot galvanizing and a preparation method of the low-density steel. The steel comprises the following chemical components in percentage by mass: 0.05%-0.13% of C, 0.4%-0.9% of Si, 0.6%-1.2% of Mn, less than or equal to 0.02% of P, less than or equal to 0.03% of S, 3.0%-6.0% of Al, 0.012%-0.052% of Ti, 0.0012%-0.0042% of N and the balance of Fe and inevitable impurities. The production process has the advantages that the production process of converter or electric furnace smelting, medium and thin slab continuous casting and rolling, acid pickling, cold rolling, nickel plating and hot galvanizing is adopted, the hot-galvanized low-density steel with the yield strength of 330-500 MPa, the tensile strength of 590-700 MPa and the elongation rate of 25%-35% is produced, and the hot-galvanized low-density steel has the advantages of being low in density, high in formability, low in emission and high in surface quality.

The invention belongs to the technical field of steel smelting, and particularly relates to a rare earth steel smelting method based on a thin slab continuous casting and rolling production line. Comprising the following steps: (1) dynamic dephosphorization control: controlling the temperature of molten steel to be 1380-1410 DEG C, the content of FeO in slag to be 15-20%, the alkalinity of the slag to be 1.8-2.2 and the content of phosphorus at the end point to be less than or equal to 0.015% in a window period 0-6 minutes before converter smelting; and (2) converter end point carbon and oxygen regulation: the converter end point carbon content is greater than or equal to 0.08%, the end point oxygen content is less than or equal to 300ppm, and the end point inclusion density is less than or equal to 10 inclusions / mm < 2 >. Through a process chain of dynamic dephosphorization and oxygen reduction, gradient deoxidation and purification, step-by-step slag system optimization, rare earth sequential addition and whole-course protection casting, a forward circulation of molten steel cleanliness and rare earth stability is formed, the rare earth steel continuous casting problem is fundamentally solved, and technical innovation and economic breakthrough are achieved at the same time.

The invention discloses an electrode cap for controlling resistance spot welding nugget deviation of an aluminum workpiece and a matched welding method, the electrode cap comprises a first cylinder, a geometry and a second cylinder, the geometry is in smooth transition to a welding end face through a cambered surface or a conical surface to optimize current distribution, so that the nugget is promoted to deviate towards a thin plate side in the welding process, and the welding quality is improved. The fusion depth of the thin plate side is effectively increased; in the welding process, the electrode cap is used in cooperation with a traditional spherical electrode cap without special design, and a set of complete welding solution is formed. According to the scheme, three key stages of pre-pressing, power-on welding and cooling are covered, and high efficiency and stability of the welding process are ensured by accurately regulating and controlling parameters of each stage, such as pressure, welding current, power-on duration and cooling time. According to the method, the welding quality of the aluminum alloy workpieces with different thicknesses is improved, the problem of nugget deviation is effectively solved, and a more reliable and efficient welding technology choice is provided for the high-end manufacturing fields of new energy automobiles, aerospace and the like.

The utility model discloses a step-by-step blanking and step-by-step stamping integrated device for a long-strip-shaped stainless steel sheet, and relates to the technical field of tweezers processing equipment.According to the step-by-step blanking and step-by-step stamping integrated device for the long-strip-shaped stainless steel sheet, the whole device is arranged to be in a U shape, and the whole device is transferred through a first transferring mechanism; compared with the existing step-by-step work of blanking and bending, the continuous and uninterrupted work can be realized, the efficiency is improved, the occupied space of equipment is reasonably arranged, the stress of a material in the deformation process can be dispersed through multiple times of punching, stress concentration is reduced, cracks caused by excessive strain are avoided, and the product quality is improved. Multiple times of stamping allow more accurate control of the strain rate of each time of stamping, improvement of material plasticity and reduction of damage accumulation are facilitated, the problem of product forming cracking in the prior art is solved, and the product forming quality is improved.

The utility model discloses a heat exchange plate, belongs to the field of air preheaters, solves the problem that better heat exchange efficiency cannot be obtained when a plate sheet with higher hardness is used in the prior art, and mainly adopts the technical scheme that the heat exchange plate is formed by welding two thin plates which are arranged front and back through a plurality of linear welding parts, the non-welded parts on the two thin plates are far away from each other to form an air cavity for flowing air, the left side of the air cavity is an air inlet side, the right side of the air cavity is an air outlet side, and the linear welding part is in an up-and-down fluctuating wave shape. The heat exchange plate is mainly used for improving the heat exchange efficiency while ensuring the strength of the heat exchange plate.

The invention discloses a magnesium alloy plate strip direct connection forming method and equipment system, and solves the problems of discrete process, serious oxidation and high energy consumption of a wide and thin magnesium plate. The method is realized through direct connection and cooperative control of the whole process of casting, extrusion, warm rolling and annealing, wherein a gradient solidification mold is adopted to control melt phase change, and high-frequency short-stroke stepping extrusion and dovetail groove dummy ingot are combined; pressing head return synchronously triggers a rolling mill and a loop box to perform warm compensation connection extrusion-warm rolling; tension is regulated and controlled through fuzzy PID; two-stage filtration, electromagnetic-ultrasonic composite grain refinement and CVC + AGC warm rolling are integrated; and the rolled plate is directly annealed in a nitrogen protection mobile coiling furnace. Continuous production of four procedures is achieved, oxidation heat loss is reduced, efficiency is improved by more than 50%, energy consumption per ton is smaller than or equal to 0.8 tce, the defect rate is smaller than or equal to 0.5%, the service life of a die is longer than or equal to 5000 times, thin plates with the width larger than 800 mm and the thickness + / -0.1 mm (for example, the tensile strength of AZ31 is larger than or equal to 350 MPa) can be stably produced, and the ductility is improved by 40%. The method is suitable for high-efficiency and low-consumption manufacturing of high-performance lightweight magnesium plates in the fields of aerospace and automobiles.

The invention discloses aluminum profile thin plate weld joint welding equipment which comprises a welding frame and an aluminum plate and further comprises a truss, a welding rod, a welding rod and a welding rod. The welding table is placed below the welding frame and used for placing and fixing the aluminum plate to be welded; the fixed box is arranged on the truss in a sliding manner; and the collecting box is connected with the fixing box through an auxiliary welding structure, and the collecting box is used for collecting waste generated during welding. The device has the advantages that welding waste is collected and treated in a unified mode, the storage efficiency of the waste is improved in the treatment process, continuous operation of the device is kept, and the pressing effect of the pressing wheel is matched, so that the welding position of an aluminum plate is connected naturally, flatly and attractively, and welding seams are trimmed synchronously and efficiently in cooperation with the welding speed; and during welding, high residual heat left at the welding position is used for trimming the welding position, so that the welding seam is smooth and flat, the final welding effect is guaranteed, and higher welding quality, precision and stability are provided.

The invention relates to a mixed rolling production line and a production method thereof. The production line comprises a production line A and a production line B which are arranged in parallel; the production line A comprises a continuous casting unit, a line A rough rolling unit, a line A hot coiling station, a finish rolling unit, a cooling device and a coiling unit which are collinearly arranged in sequence; the production line B comprises a heating furnace, a line B descaling device, a line B rough rolling unit and a line B hot rolling station; a furnace discharging roller way of the heating furnace, the line B descaling device, the line B rough rolling unit and the line B hot rolling station are collinearly arranged in sequence; the A-line hot rolling station and the B-line hot rolling station are connected through a transverse moving track, and a movable hot rolling device is movably arranged on the transverse moving track. The movable hot rolling device is switched between the A-line hot rolling station and the B-line hot rolling station, organic coupling of the two production lines is achieved, the thin slab production mode and the thick slab production mode of the mixed rolling production line share the finish rolling unit, the coiling machine and the like, and the equipment investment and the occupied area of the production line are effectively reduced.

The utility model relates to a PCB sheet furnace-passing jig comprising a base plate, the base plate is provided with a groove used for placing a sheet, the groove is internally provided with a plurality of first limiting nails and an elastic limiting assembly, and the first limiting nails and the elastic limiting assembly are respectively close to two opposite sides in the groove; the elastic limiting assembly comprises a sliding block and a second limiting nail, the sliding block is elastically clamped on the bottom plate, the second limiting nail is arranged on the sliding block, the sliding block can slide relative to the bottom plate so as to be close to or away from the first limiting nail, and the thin plate can be clamped to the first limiting nail and the second limiting nail. According to the utility model, through the first limiting nail arranged in the groove and the slidable elastic limiting assembly comprising the second limiting nail, the PCB thin plate can be ensured to be accurately positioned and fixed when being placed, the stability and the position accuracy of the thin plate can be maintained in a furnace passing process, and the production reject ratio caused by position deviation is reduced.

The utility model relates to the technical field of low-cycle fatigue tests, and discloses an anti-buckling tool for a low-cycle fatigue test sheet metal structure, which comprises a fixing assembly and a guide assembly, the fixing assembly comprises an upper fixing piece I, an upper fixing piece II, a lower fixing piece I and a lower fixing piece II, two screws are connected between the first upper fixing piece and the second upper fixing piece, two screws are connected between the first lower fixing piece and the second lower fixing piece, and cushion blocks are arranged on the inner side faces of the first upper fixing piece, the second upper fixing piece, the first lower fixing piece and the second lower fixing piece. Through the fixing assembly, the sample can be conveniently and quickly assembled, the low-cycle fatigue test requirement of the sheet metal structure can be met, and the lateral buckling instability phenomenon between a clamping part of equipment and the buckling-restrained tool can be reduced; through the guide assembly, when the sample bears a tension and compression cyclic load, the lateral buckling instability phenomenon in the thickness direction is prevented, and the stability of the sample is further enhanced.

The invention discloses an alloy die-casting flowability die capable of testing high-vacuum different wall thicknesses. The die comprises a fixed die, a movable die and a die holder. Wherein the movable mold is provided with a cavity, and the cavity comprises an overflow groove, three flowability samples with different thicknesses, a material cake, a vacuum test groove, a shunting hole and an ESCs collector. In order to avoid turbulent air entrapment caused by a large corner and ensure that the tail end is communicated with the exhaust thin plate, the flowability channel is designed to be annular, the corner angle of the die is smooth and smooth, and shrinkage porosity, shrinkage cavity and air entrapment almost do not exist through intelligent casting super-cloud die flow analysis, so that the flowability of the alloy can be correctly reflected. In addition, the mold can also be used for testing the flowability of alloys with different thicknesses, and the flowing stopping length of the sample serves as the basis for judging the flowability. In conclusion, the flowability of the alloy under different wall thicknesses can be tested at the same time in the high-vacuum die-casting state, and the flowability of the alloy can be correctly reflected.

The application discloses an asymmetric ring electrode cap, discards the traditional two-side uniform spherical electrode design, and adopts an asymmetric ring electrode structure, specifically, the welding end face diameter of a thin plate side electrode cap is 6-14 mm, the curvature radius is 40-100 mm, three rings are arranged, the inner ring is provided with a conical pit, and the middle ring is in the shape of an isosceles trapezoid; the welding end face diameter of a thick plate side electrode cap is not less than that of the thin plate side and not more than 14 mm, the curvature radius is not less than that of the thin plate side and not more than 100 mm, three rings are also arranged, the inner ring is provided with a conical pit, and the middle ring is in the shape of an equilateral triangle. The ring structure parameters of the two electrode caps are accurately designed to adapt to the welding requirements of plates with different thicknesses, and the welding quality and efficiency are improved. The application is particularly suitable for resistance spot welding of materials such as aluminum workpieces with large thickness ratios.