2044results about How to "Easy to process" patented technology

Frog farming method and frog cage are provided. The method comprises: I, putting young frogs in the frog cage in spring; II, putting lure attracting mosquitoes into the frog cage into the frog cage in summer and autumn, thereafter the frogs feed on the mosquitoes; III, avoiding snakes entering the frog cage in the place where the snakes inhabit; IV, covering the frog cage with plastic film in winter, mounting an electric lamp in the frog cage, increasing the temperature of air in the frog cage to keep the frogs not hibernating and promote the frogs to grow; V, adding artificial lure if necessary. The frog cage includes a fixed frog cage and a vehicle-mounted frog cage, both including inner tiers, wherein a water basin, a terrace and a stairway communicating the upper and lower tiers are arranged on each tier, and the frog cage is covered with a mesh enclosure. The frog framing method and frog cage have the advantages that the frogs are farmed in multi-tier cages, lures are used outdoors to attract insects, pests are eliminated for crops, natural ecology is balanced, and food sources are also provided for human; cage framing of frogs is very low in cost; frogs farmed have high reproductive rate, high disease resistance and high feed conversion capacity.

The invention discloses a folding wing structure of an unmanned aerial vehicle, which comprises a rotating shaft embedded in a vehicle body, wherein a lower wing elastic sheet and an upper wing elastic sheet are mounted in an inner cavity of the rotating shaft from bottom to top, a first locking block and a second locking block are respectively arranged at the free ends of the lower wing elastic sheet and the upper wing elastic sheet, the first locking block and the second locking block are respectively matched with a first notch and a second notch which are formed in the rotating shaft, the outer side of the rotating shaft is sequentially sleeved with a lower wing and an upper wing from bottom to top, the upper surface of the lower wing and the lower surface of the upper wing are each provided with a groove, the two grooves are oppositely formed to form a torsional spring groove, a torsional spring is arranged in the torsional spring groove, and the upper inner sides of the lower wingand the upper wing are provided with a first locking groove and a second locking groove correspondingly; and the outer side of the rotating shaft is further sleeved with a roller bearing, a baffle isinstalled at the top of the rotating shaft, and the roller bearing is located between the upper wing and the baffle. The processing cost of the unmanned aerial vehicle is reduced, the folding wing structure is insensitive to the structural size, and the folding wing structure can adapt to a more miniaturized barrel-shooting unmanned aerial vehicle.

The invention provides a construction method of a prefabricated multi-ribbed cavity floor, and belongs to the technical field of prefabricated multi-ribbed plate construction. The construction method of the prefabricated multi-ribbed cavity floor comprises the steps of full-hall scaffold building, main keel laying, overall leveling and the like. The construction method comprises the steps that S1, full-hall scaffold building is conducted, specifically, when a full-hall scaffold is built, vertical rods on the upper layer and the lower layer are required to be aligned, the vertical rods are uniformly arranged from the two sides of a cast-in-place ribbed beam, the vertical rods are arranged at the intersection positions of floor elastic bidirectional lines, and scaffold boards are laid under the vertical rods; S2, main keels are laid, specifically, when the main keels are installed, the main keels are required to be arranged in order and not to be inclined, and the two vertical rods at the intersection positions must abut against the main keels; and S3, overall leveling is conducted, specifically, after the main keels are laid, overall leveling is conducted according to control lines, and full-hall scaffold formworks are hoisted on the main keels. The cavity formworks are supported by placing the modularized cavity formworks which are machined and formed in a factory-like mode, and accurate and rapid installation of an upper plate of the prefabricated multi-ribbed plate is achieved by installing limiting square pipes.

The invention relates to the technical field of turning equipment, and discloses turning equipment for a precision bearing assembly, which comprises two symmetrically arranged chucks, a rotation driving assembly for driving the chucks to rotate, a driving base for driving the chucks to translate, and a cutting mechanism for cutting a workpiece, a plurality of first sliding grooves are formed in the chuck in the radial direction, the first sliding grooves are formed in the chuck in a penetrating mode, first sliding bases are slidably installed in the first sliding grooves, and sliding type fixing rods are arranged in the first sliding bases in a penetrating mode; through the arrangement of composite positioning of the axial adjustable sliding type fixing rod and the two-way double chucks, adaptive clamping of long cylindrical blanks with different axial lengths is achieved, and the fixing mode that inner hole multi-point supporting and end face pressing are combined is adopted; the problems of blank local deformation, rotation eccentricity and low coaxiality caused by a traditional clamping mode are effectively solved.

The utility model provides a positioning clamp for assembling a bed core frame, and belongs to the technical field of machinery. The problem that an existing clamp affects the assembling stability is solved. The positioning clamp for assembling the bed core frame comprises a base plate, and two sets of clamping assemblies are arranged on the base plate in a front-and-back mode; the clamping assembly comprises at least one clamping unit, each clamping unit comprises a vertically-arranged clamping block, a liftable pressing piece and a translation mechanism used for driving the clamping block to translate front and back, and a clamping area used for clamping a bed core is defined by the multiple clamping blocks; a strip-shaped notch is formed in the side, close to the clamping area, of the top wall of the clamping block and penetrates left and right, a section of supporting face with the arc-shaped cross section is arranged on the inner wall of the strip-shaped notch, a pressing piece is arranged over each supporting face, and a clamping opening used for pressing the frame is formed between each pressing piece and the corresponding supporting face. A driving mechanism enabling the corresponding pressing piece to move front and back is arranged on the side, back to the clamping area, of the clamping block. The positioning clamp for assembling the bed core frame can ensure the assembling stability.

The invention relates to the field of material chemistry on-line detection, in particular to a 1, 2, 4-trichlorobenzene on-line detection material and a preparation method thereof, and provides a film-forming sensitive layer material capable of being coated on the surface of a transducer, and the film-forming sensitive layer material comprises chitosan, a crosslinking component with the content of 0.1-5wt% in terms of glutaraldehyde and magnetic core-shell molecularly imprinted particles after being dried, the magnetic core-shell molecularly imprinted particle contains a ferroferric oxide magnetic inner core, a silicon dioxide middle layer and a molecularly imprinted polymer shell layer, and the shell layer is a cyclodextrin methacrylate and ethylene glycol dimethacrylate copolymer network and takes 1, 2, 4-trichlorobenzene as a template. The material keeps the membrane integrity and long-term stability under the working conditions of circulation and regeneration and also gives consideration to quick response, and the residual 1, 2, 4-trichlorobenzene is controlled to be not greater than 0.10 wt% and the residual glutaraldehyde is controlled to be not greater than 0.5 wt%. The method is used for relieving structural mass transfer contradiction and processing and coating coupling contradiction caused by high filler load, and has online detection application value.

The utility model provides a pole, a top cover assembly, a battery monomer, a battery and a power utilization device, and relates to the technical field of batteries, the pole comprises at least one first connecting part and at least two second connecting parts, along a second direction, the first connecting part has a third surface; the at least two second connecting parts are used for being connected with the tabs, each second connecting part comprises a main body part and a first flanging part, each first flanging part is connected to one end face, in the second direction, of the corresponding main body part and extends towards the corresponding first connecting part, each first flanging part is connected with the corresponding first connecting part, and each first flanging part is provided with a fourth face in the second direction; and the fourth surface and the third surface are positioned on the same side in the height direction of the post terminal, are positioned on the same plane and form a second surface. Therefore, the processing of the pole is more convenient, and the size of the pole in the width direction can be reduced.

The invention discloses a polypropylene composite material with high dielectric constant, high strength and high modulus as well as a preparation method and application thereof, and belongs to the technical field of polymer composite materials. According to the composite material, homo-polypropylene is used as a matrix and matched with a high-dielectric-constant composite filler, a modified reinforcing filler and a functional additive, and through reasonable component design and process optimization, the dielectric property and the mechanical property are synergistically improved. Wherein the barium titanate-graphene with the core-shell structure is used as a high-dielectric-constant composite filler, and an efficient dielectric path can be constructed in a polypropylene matrix; the epoxy resin modified chopped glass fiber can significantly enhance the mechanical strength and modulus of the material; the maleic anhydride grafted polypropylene effectively improves the interfacial compatibility of the filler and the matrix. The dielectric constant (10GHz) of the prepared composite material is greater than or equal to 8, the tensile strength is greater than or equal to 60 MPa, and the bending modulus is greater than or equal to 4000 MPa. The composite material has excellent dielectric properties and mechanical properties, and can be widely applied to the fields of electronic appliances, high-frequency communication, new energy automobiles and the like.

The invention relates to the technical field of metal materials, in particular to a high-strength steel material for mine roadway support and a preparation method thereof, and the high-strength steel material comprises the following components in percentage by weight: 0.04 to 0.10 percent of C, 0.15 to 0.45 percent of Si, 1.20 to 1.80 percent of Mn, 0.20 to 0.50 percent of Cu, 0.15 to 0.40 percent of Cr, 0.10 to 0.35 percent of Ni, 0.08 to 0.25 percent of Mo, 0.015 to 0.045 percent of Nb, 0.03 to 0.08 percent of V, 0.008 to 0.025 percent of Ti, 0.005 to 0.020 percent of RE and the balance of Fe. The preparation method comprises the steps of smelting and refining, continuous casting, heating, rough rolling, finish rolling, segmented controlled cooling and medium-temperature tempering (450-550 DEG C), R is larger than or equal to 620 MPa, A is larger than or equal to 18%, the yield ratio is smaller than or equal to 0.90, KV at 0 DEG C is larger than or equal to 100 J, and the deep-well high-stress roadway support is suitable for deep-well high-stress roadway support.

The invention belongs to the technical field of aircraft engine accessory casing structural design, and particularly relates to an aircraft engine accessory casing fuel pump gear shaft spline bearing lubricating structure which comprises an oil passing shaft and an adapter ring. The oil passing shaft is a hollow shaft and is arranged in the end, provided with the gear, of the gear shaft, the end of the gear shaft is sleeved with a bearing, the bearing is located on the outer side of the gear, and a spline is arranged in the other end of the gear shaft. The gear shaft is provided with a plurality of bearing lubricating channels distributed in the circumferential direction, all the bearing lubricating channels are communicated with the portion between the bearing and the gear, and all the bearing lubricating channels incline towards the bearing. The adapter ring sleeves the oil passing shaft and is connected to the inner side of the gear shaft; an annular oil collecting groove is formed in the end portion of the end, facing the spline, of the adapter ring, an annular oil collecting cavity is formed between the adapter ring and the gear shaft, the annular oil collecting groove and the annular oil collecting cavity are communicated through a plurality of oil through holes distributed in the axial direction, and the annular oil collecting cavity is communicated with the bearing lubricating channels.

A valve device (30) is provided with a cylindrical passage-forming member (40) and a cylindrical spool valve (60) that is slidable with respect to the passage-forming member (40). The passage-forming member (40) has a communication port (56) that communicates the inside and the outside in the radial direction. The slide valve (60) has at least one cut portion (62, 63) cut from one end surface (61) in the axial direction (Rs). The degree of communication of the cutout portions (62, 63) with respect to the communication port (56) can be adjusted by relative displacement of the spool valve (60) with respect to the passage forming member (40).

The utility model discloses a kind of wall column foot support structure, including inclined support plate and the horizontal support plate of the inclined support plate rotary connection, the one end of the inclined support plate away from the horizontal support plate is equipped with hook, the hook is matched with the double steel pipe of the pair of screw rod fixed assembly for fixing wall column formwork;When the hook is hung on the double steel pipe of the pair of screw rod fixed assembly, the one end of the inclined support plate away from the hook is abutted with ground, the one end of the horizontal support plate away from the inclined support plate is abutted with the lower end of the square steel of the pair of screw rod fixed assembly.The utility model realizes wall column foot stable support, effectively prevents leakage, improves construction convenience and economy simultaneously.

The utility model relates to the technical field of rough rolling mill, and disclose a rough rolling mill, include: base, heating mechanism, rough rolling mechanism and finishing mechanism, heating mechanism, rough rolling mechanism, finishing mechanism are assembled in the upper end of base respectively, the top of base is assembled with cooling roll, the outside of cooling roll is evenly provided with water outlet groove, the front of cooling roll is assembled with servo motor, and the other end of cooling roll is inserted with the short pipe, the outside of short pipe and servo motor is all bushed with bearing, and the ground of bearing is connected with base through pedestal. The rough rolling mill, the outside of big specification round bar is evenly sprayed water source, thereby realizes the even cooling to big specification round bar, reduces the outside temperature difference of big specification round bar, thereby improves the processing effect to big specification round bar, and simultaneously through the water storage module of adding, the water source produced by the device cooling big specification round bar is recycled, and then realizes the recycling of cooling water, reduces the waste of water resources.

This invention discloses a method for preparing high-purity oxygen-free copper, relating to the field of metallurgical technology. The method includes multi-stage electrolytic refining, gradient-heating vacuum melting, inert gas-protected refining, electron beam melting, hydrogen plasma arc melting, directional solidification, and post-treatment steps. The multi-stage electrolytic refining utilizes a specific component electrolyte and periodically commutated current; vacuum melting is combined with bidirectional electromagnetic stirring; inert gas-protected refining is combined with a gradient reduction composite covering agent; electron beam and hydrogen plasma arc melting achieve deep purification and deoxidation; and directional solidification and two-stage annealing ensure product performance. The high-purity oxygen-free copper prepared by this invention has a conductivity of 102.3% IACS, a copper content ≥99.9999%, and an oxygen content <1.0 ppm. It exhibits high purity, low oxygen content, and excellent conductivity. The process is stable and controllable, making it suitable for high-end electronics applications.

The utility model provides a pitched roof sleeve structure and a mold capable of automatically compensating installation angle and location degree machining errors, and relates to the technical field of molds, the pitched roof sleeve structure capable of automatically compensating installation angle and location degree machining errors comprises a pitched roof assembly and a pitched roof hole formed in a mold plate in a penetrating mode, the pitched roof assembly is arranged in the pitched roof hole; a compensation gap used for compensating installation angle and position degree machining errors is formed between the inclined ejection assembly and the inner wall of the inclined ejection hole. The mold comprises the inclined ejector sleeve structure capable of automatically compensating the installation angle and position degree machining errors. According to the utility model, through the pitched roof hole with the compensation gap, the installation angle and the location degree of the pitched roof assembly can be automatically compensated in the installation process of the pitched roof assembly, and the processing error of the pitched roof hole can be effectively compensated on the basis of ensuring the installation effect of the pitched roof assembly, so that the production and the processing are more convenient; and meanwhile, the phenomenon that the pitched roof is stuck due to insufficient machining precision of the pitched roof hole can be effectively avoided, and the ejection effect is ensured.

The present application relates to a kind of compositions and applications comprising polyamide.The composition includes polyamide and sheet structure mineral powder, wherein, with 100 mass parts of polyamide, sheet structure mineral powder in the composition is 0.1-10 mass parts.The polyamide material in the present application has lightweight, easy processing, has cost advantage, compared with steel material has obvious advantage.Sheet structure mineral powder is added in polyamide material by intercalation modification, further improve the barrier property of product, effectively avoid "hydrogen embrittlement" risk, with "hydrogen embrittlement" resistance, low hydrogen permeability, and suitable for the temperature range of application, it has high toughness in low temperature environment condition, the performance of polyamide material reaches a good balance, and the comprehensive performance is better.Suitable for hydrogen pipeline, hydrogen storage bottle etc., has advantage in hydrogen energy automobile and other application scenarios.

The utility model provides a work fixture for left and right spoilers of an automobile, which comprises a support frame, a placing frame is rotatably matched on the support frame, a plurality of fixing frames are fixed on the placing frame, a sliding plate is slidably matched on one side of each fixing frame, a pushing structure is fixed on one side of each fixing frame, and the pushing structures correspond to the sliding plates. A rotating frame is in sliding fit with one side of the sliding plate, a positioning structure is arranged between the rotating frame and the sliding plate, a mounting block is rotationally matched in the rotating frame, and a clamping plate is fixed to the mounting block. According to the spoiler fixing device, the height and the angle of the clamping plates can be adjusted, the spoiler is clamped and fixed through the multiple clamping plates, the clamping plates are made to be better attached to the radian of the spoiler, and therefore a good fixing effect can be achieved, the spoiler fixing device is suitable for spoilers of various specifications, and the application range of the spoiler fixing device is widened; and the placing frame can be rotated, so that the clamped spoiler is driven to rotate, and the spoiler is convenient to machine.

This utility model discloses an automatic tool breakage detection device for a machining center, comprising a machining center body. An operation button is located on the left side of the front of the machining center body, and a display panel is located on the right side of the front of the machining center body. A machining groove is formed on the front of the machining center body, and a lifting hydraulic cylinder is located above the inner wall of the machining groove. This utility model, through the cooperation of a movable frame, a forward and reverse motor, a lead screw, and a nut seat, enables the movable frame to follow the position of the drill bit, ensuring that the infrared transmitter and infrared receiver are always in the appropriate position for tool breakage detection. Once the drill bit breaks, the infrared receiver receives an infrared signal, immediately triggering a buzzer alarm and an alarm light, promptly alerting the operator and preventing continued machining with the broken tool. This effectively improves workpiece machining quality, reduces scrap rate, lowers production costs, increases processing efficiency, and ensures smooth production.

The utility model discloses a kind of laser cutting platforms for automobile parts, it is related to cutting auxiliary equipment technical field, including workbench, the rotary table of placing part is equipped on the workbench, the drive assembly of driving rotary table rotation is equipped on the workbench, the laser cutting head of carrying out laser cutting to part is equipped on the workbench, the clamping assembly of clamping part is equipped on the rotary table, the moving assembly of driving laser cutting head movement is equipped on the workbench. Part is stably clamped on workbench by the clamping assembly on rotary table, the position of laser cutting head is adjusted by moving assembly, the angle of rotary table is adjusted by drive assembly, and then the accurate cutting work of part clamped on rotary table is realized, and part cutting quality is better, and practicality is higher.

The utility model discloses a kind of surface texture etching devices of welcome pedal, including chassis, two groups of side plates are fixedly connected in the chassis inner side wall, first sliding rod is fixedly connected between side plate, first screw rod is rotatably connected between side plate, first screw rod surface is threadedly connected with screw sleeve A, screw sleeve A surface is fixedly connected with first mobile element, first mobile element side wall is fixedly connected with groove plate, second sliding rod is fixedly connected in groove plate inner side wall, second screw rod is rotatably connected in groove plate inner side wall, second screw rod surface is threadedly connected with screw sleeve B, screw sleeve B surface is fixedly connected with second mobile element, groove plate side wall is slidably connected with etching laser group;The utility model can realize the linkage of etching laser group in XYZ three axes, positioning accuracy, the position and moving path of etching laser group can be flexibly changed, different shape and complex degree of texture etching demand can be adapted, different sizes of welcome pedal can also be conveniently processed.

The utility model discloses a combined tool for machining a thrust surface of an engine cylinder block, which relates to the technical field of machining the thrust surface of the engine cylinder block and comprises a fixing plate, a lifting adjusting mechanism is arranged on one side of the fixing plate and comprises a support frame, and the support frame is fixedly connected to one side of the fixing plate. Through the arrangement of the lifting adjusting mechanism, the function of lifting and adjusting the height of the cutter according to the heights of different engine cylinder bodies can be achieved, in the using process, the first motor is started to drive the cutter body to ascend and descend to a proper height, and in the lifting process of the cutter body, the sliding block slides on the outer wall of the sliding rail, so that the cutter body can be lifted and descended. According to the combined cutter, the cutter body can ascend and descend more stably and smoothly, the situation that the height of an engine cylinder body is high or low and the cutter cannot normally mill a thrust surface due to the fact that the height of the combined cutter cannot be adjusted according to the height of an engine can be avoided, and the flexibility and the application range of the combined cutter are guaranteed.

The invention provides a solid-liquid conversion type polymer-based thermal interface material as well as a preparation method and application thereof, and the solid-liquid conversion type polymer-based thermal interface material is prepared from the following raw materials: vinyl terminated polydimethylsiloxane, active hydrogen group terminated siloxane and inorganic filler, the inorganic filler comprises a spherical filler and a flaky filler, and the weight ratio of the spherical filler to the flaky filler is (1.5-14): 1. Through cooperation of the spherical filler and the flaky filler, the spherical filler can generate a physical adsorption effect on the surface of the flaky filler and is different from a heat conduction channel formed by the spherical filler; a heat conduction channel formed by the flaky filler-spherical filler composite plays a role in integrating the dispersed small-particle-size spherical filler, so that the complete heat conduction channel can be formed at a relatively low filling fraction. The solid-liquid transition type polymer-based thermal interface material disclosed by the invention has low density and high thermal conductivity, and the workability and the lightweight performance in thermal management of optical module equipment are effectively improved.

This utility model discloses an integrated aluminum profile bending and cutting machine, relating to the field of aluminum profile processing technology. It includes a base plate, on which a processing table is fixedly mounted. A turntable is rotatably mounted inside the processing table, and an arc control block is fixedly mounted on the turntable. An extrusion column is adjustablely mounted on the turntable. A second cutting machine is fixedly mounted on the arc control block. A clamping assembly is mounted on the processing table, and a first cutting machine is mounted on the side of the clamping assembly. Starting the motor drives the drive wheel to rotate, thereby rotating the extrusion column, which, in conjunction with the arc control block, achieves bending of the aluminum profile. Starting the second cutting machine cuts the bent portion of the aluminum profile tube, and starting the first cutting machine cuts the straight section of the aluminum profile tube. This solves the problem in the prior art where, when small-size bending is required, a secondary cutting of the bent portion is necessary, affecting the processing efficiency of the aluminum profile.

The application belongs to the technical field of optical part processing devices, and particularly relates to an intelligent processing device for precise parts of optical instruments, comprising a base; side plates are installed on the top of the base, grinding assemblies are arranged between the two groups of side plates, hollow sliding cavities are formed in the end portions of the two groups of side plates, two groups of linkage shafts are slidingly connected in the hollow sliding cavities, the two groups of linkage shafts are slidingly connected at the two ends of the grinding assemblies, purification assemblies for adsorbing and cleaning the grinding assemblies are installed on the outer walls of the two groups of side plates, the driving assembly is used for horizontally moving, adsorbing and rotating the lens of the optical instrument that needs to be edged, the lens is ground at the edge in the horizontal moving and rotating process through the grinding assembly, the ground lens is in a state of flat edge, and the lens before and after grinding can be subjected to optimized treatment of the construction environment through the continuous working of the purification assembly, so that the operation efficiency of self-adaptive processing and adjustment of a single lens is improved.

The application provides an RGB-based self-adaptive translation flat display picture method and system. By writing the horizontal and pitching deviation into a memory, combining the layout characteristics of the flat display picture, and adjusting the position of the starting point of the distortion correction based on the FPGA, the self-adaptive compensation of the flat display part machining and assembly error is realized without increasing the operation amount and the delay, and the translation process correctness monitoring is performed. The application can be applied to the compensation of the machining and assembly error of the large field of view digital flat display, increases the margin of the flat display part machining and assembly, and further reduces the cost.

The application discloses a magnesium-based composite material and a preparation method and application thereof. The magnesium-based composite material comprises ferroferric oxide and a magnesium alloy. The magnesium alloy comprises the following components in percentage by weight: 3wt.%-6wt.% of Zn, 0.3wt.%-0.8wt.% of Ca, and the rest of Mg and inevitable impurities. The magnesium-based composite material can effectively solve the problem that micron-sized particles are easy to agglomerate in a metal liquid when the magnesium alloy is modified, and the plasticity of the alloy is reduced and the alloy is not easy to be formed.

The application discloses a preparation method of a ternary hybrid micro-nano particle / encapsulated flame-retardant heat-conducting epoxy composite material with a branch-leaf structure, and belongs to the technical field of micro-nano particle modified hybrid and preparation of flame-retardant heat-conducting composite materials. The application provides a preparation method of an encapsulated epoxy composite material with a branch-leaf structure hybrid nano particle, in which boron nitride nano sheets with excellent heat-conducting and flame-retardant properties are selected as leaf structures, the surfaces of the boron nitride nano sheets are modified by aluminum oxide microspheres with excellent heat-conducting properties, and silicon carbide nano wires with excellent heat-conducting properties are selected as branch structures, so that the branch-leaf structure hybrid nano particle is constructed, and the encapsulated epoxy resin composite material with excellent heat-conducting and flame-retardant properties is prepared.

This invention discloses a method for preparing a large round billet for continuous casting of forged cold-rolled roll sleeves, comprising: controlling the composition system, wherein the chemical composition of the raw material steel is: C: 0.65-0.75%, Si: 0.25-0.40%, Mn: 0.35-0.50%, P≤0.020%, S≤0.020%, Cr: 1.90-2.10%, Ni: 0.30-0.45%, Mo: 0.20-0.40%, V: 0.05-0.10%; and controlling the continuous casting process parameters, wherein the superheat is controlled within a certain range. The casting temperature is maintained between 15 and 35°C, the casting speed is kept stable at 0.24 ± 0.01 m / min, the crystallizer water flow is controlled at 3700 L / min, and the secondary cooling water flow in the crystallizer is controlled at 0.12 L / Kg. During continuous casting, a 200 A / 2.5 HZ electromagnetic stirring of the casting flow and a 500 A / 1.2 HZ strong end electromagnetic stirring are used. The heat treatment process parameters for the continuously cast round billets are controlled as follows: red-charging annealing of the continuously cast round billets, furnace charging temperature ≥ 400°C, heating rate ≤ 100°C / h, holding at 730°C for ≥ 15 h, furnace cooling to 400°C, and air cooling upon exiting the furnace. This invention ensures the hardness and wear resistance of the cold-rolled roll sleeves while improving toughness and machinability, avoiding surface cracking and internal cracking of the roll sleeves during the casting and forging processes, ultimately achieving high-efficiency production and long service life of the roll sleeves.

The utility model belongs to the axle machining technical field, concretely relates to a tool for processing rail vehicle axle defect, including work table, be provided with two parallel guide rails on the work table, be provided with two groups of support components on two the common sliding of guide rail, realize the support to axle through two groups of support components, support component includes the sliding table of sliding setting on two the guide rail, both sides of the front and back of sliding table upper surface all are fixedly set with support plate, two support wheels are rotatably installed between two support plates, two support wheels are left and right symmetrical arrangement. The setting direction of guide rail is perpendicular to the axis of the original three-jaw chuck clamping axle, and the deflection direction of the tool on the machining machine is same, can realize the processing to axle variable diameter position transition arc surface, is applicable to the processing of axle standard defect.

The invention discloses a reflection type polarization conversion antenna with an adjustable stop band, which works in an X wave band and is composed of a dielectric substrate, a metal resonance structure layer arranged on one side of the dielectric substrate and a metal reflection layer arranged on the other side of the dielectric substrate, and the metal resonance structure layer comprises two groups of mutually nested symmetrical split circular ring resonance units. Through the technical means of translation, parameter adjustment and the like, the two groups of resonance units generate symmetry difference, so that different resonance units generate mutually counteracted surface current responses at a specific frequency, and a stop band for polarization conversion suppression is formed in a continuous working frequency band; the position and suppression intensity of the stop band can be controlled by adjusting the structural parameters of each resonance unit. While broadband high-efficiency polarization conversion is realized, a tunable narrowband polarization conversion zero point is introduced, and the tunable narrowband polarization conversion zero point has the advantages of simple structure, high regulation degree of freedom and good incident angle stability, and is suitable for communication, radar and signal monitoring systems of millimeter wave and microwave frequency bands.