247results about How to "Solve the strength problem" patented technology

The invention provides an industrial telephone communication signal enhancement method and system. The method comprises the following steps: step 1, acquiring historical communication signal data, real-time communication signal data and environment data of an industrial telephone; according to the method, the signal interference recognition model is constructed, the interference signal features are accurately recognized, interference is removed through the intelligent filtering algorithm, the problems of signal strength weakening and call quality reduction caused by electromagnetic interference are effectively solved, meanwhile, the influence of environmental factors such as temperature and humidity on communication signals is considered, corresponding compensation measures are adopted, and the communication quality is improved. The adaptability and the stability of the system in a complex industrial environment are improved; signal relay equipment is arranged, so that the signal coverage range is effectively expanded, and efficient communication and coordination among departments in industrial production are ensured; dynamic adjustment is carried out according to the communication signal quality monitored in real time, it is guaranteed that the system is in the optimal working state all the time, and the intelligent level and stability of the system are improved.

The invention provides a 700MPa-grade high-strength anti-seismic reinforcing steel bar and a production method thereof. The reinforcing steel bar comprises 0.24-0.28% of C, 0.50-0.80% of Si, 1.20-1.60% of Mn, 0.165-0.200% of V, 0.025-0.050% of Nb, 0.026-0.040% of N, [Nb] + [V] < = 0.23%, [V] / [N] < = 6.35, [C] + [N] < = 0.31%, ([Nb] + [V]) / ([C] + [N]) < = 0.67%, carbon equivalent Ceq < = 0.57% and the balance of iron and impurities. In the production method, the temperature of a soaking zone is 1255-1300 DEG C; water cooling is not adopted in the rolling process; and after rolling is completed, cooling to room temperature in air, the temperature on a cooling bed is larger than or equal to 1125 DEG C, and the cooling speed during natural cooling is smaller than 1 DEG C / s.

The invention discloses a cordierite material prepared from magnesium waste porcelain and a preparation method of the cordierite material, the cordierite material is prepared from the following raw materials: magnesium waste porcelain, talc, a clay raw material and a high-aluminum raw material, and the weight percentage of the magnesium waste porcelain is 20-40%. According to the invention, the magnesium ceramic waste is fully utilized as a cordierite synthesis precursor to prepare the high-performance heat-resistant ceramic, so that the efficient reutilization of resources is realized, the dependence on scarce resources is greatly reduced, and the cost of raw materials is effectively reduced. Meanwhile, due to the low sintering temperature, energy consumption is remarkably reduced, carbon emission is greatly reduced, and the current green and environment-friendly development concept is perfectly met. Through a unique formula and process design, the ceramic body with excellent thermal shock resistance is successfully prepared at a relatively low firing temperature. According to the technical innovation, the performance of the ceramic is remarkably improved, and a brand new thought and a brand new method are brought to the field of manufacturing of the heat-resistant ceramic.

The invention discloses a low-temperature early-strength cement slurry system based on a cellulose-based composite phase change material, and belongs to the field of oil and gas field well cementation. The preparation method of the composite phase change material comprises the following steps: adding pretreated waste paper fibers, a cross-linking agent and a heat conduction material into an alkali / urea solution, and putting the mixture into an ultrasonic cleaning instrument to obtain a mixture A; transferring to a dialysis bag, and soaking in deionized water to obtain a mixture B; and performing in-situ mixing on the mixture C and organic phase change material molecules to obtain a mixture C, and performing vacuum freeze drying. The low-temperature early-strength cement slurry system is prepared from the following components in parts by weight: 100 parts of cement, 0.3-1 part of a composite phase change material, 5-25 parts of a density reducing material, 0.1-0.8 part of an early strength agent, 0.2-1 part of a dispersing agent, 0.2-2 parts of a fluid loss agent, 0.01-0.5 part of a defoaming agent and 44-58 parts of water. While cement hydration heat release is regulated and controlled, the early compressive strength of the cement can be improved, and the operation time efficiency and the construction safety are improved.

The utility model discloses a booster pump of a hydrogen compressor, which comprises a base, and a hydrogen compression cylinder, a driving system and a balance gas tank are arranged on the base. The driving system drives a piston in the hydrogen compression cylinder to move back and forth to compress hydrogen in the cylinder body; the hydrogen compression cylinder is a composite cylinder body; two independent compression chambers are symmetrically arranged in the hydrogen compression cylinder, the balance gas tank is used for balancing the two compression chambers, and a gas inlet and a gas outlet which are communicated with the compression chambers are formed in the hydrogen compression cylinder; and one-way valves are arranged at the air inlet and the air outlet, and efficient compression of hydrogen can be achieved through the double compression cavities which are symmetrically arranged.

The invention relates to the technical field of composite materials, in particular to a long glass fiber reinforced plastic preparation process autonomous regulation and control method based on image vision, which comprises the following steps: judging the color difference interval of glass fiber and a standard sample, and judging whether floating fiber exists in colloidal particles or not according to the color difference interval; judging whether the floating fiber condition is in a first floating fiber degree or a second floating fiber degree according to the floating fiber ratio; in the first fiber floating degree, judging that the fiber floating reason is insufficient and non-uniform impregnation according to the diameter difference between the material diameters; judging whether the equipment parameters are in a preset range, and adjusting the equipment parameters; in the second floating fiber degree, the deviation condition is judged according to the diameter difference value of the materials; and judging whether the offset degree is a first category or a second category according to the offset, analyzing the offset trend, and adjusting the proportion or traction force of the polypropylene resin. By performing image view analysis on the colloidal particles prepared from the long glass fiber reinforced plastic, the reason of fiber floating is judged, and the preparation process is correspondingly regulated and controlled.

The invention discloses a high-resilience eTPU foaming material and a preparation process thereof, and belongs to the technical field of foaming materials. The process comprises the steps of raw material premixing and TPU chain extension reaction, precursor system injection, in-situ phase change energy storage core-shell particle generation, supercritical two-fluid foaming and molding post-treatment. Wherein the SiO2-coated TiO2 core-shell particles are prepared by a non-hydrolytic sol-gel method, the porous SiO2 core adsorbs and fixes the micro-crosslinked polyurethane-based phase change material, the TiO2 shell provides sealing and supporting, the particles are combined with the TPU matrix through covalent bonds, and the micro-crosslinked polyurethane-based phase change material has a unique micro-crosslinked network structure, so that the thermal conductivity of the TPU matrix is improved, and the thermal conductivity of the TPU matrix is improved. The hidden danger of leakage of the phase change material in the using process can be effectively eliminated, and meanwhile the interface bonding effect between the inorganic particles and the TPU matrix is synchronously enhanced. The eTPU foaming material prepared by the invention has the characteristics of high resilience, strong interface bonding, excellent energy storage stability and low compression set, and is suitable for shoe materials, automotive interiors and other scenes.

The invention discloses a continuous fiber reinforced co-extrusion die, a forming line body and a fiber reinforced foaming floor, and relates to the technical field of foaming floors, the continuous fiber reinforced co-extrusion die comprises a die body, the front end face and the rear end face of the die body are a mixed extrusion face and a core material feeding face respectively, and one side face of the die body is provided with a shell material feeding port; a core material supply channel penetrating through the mixed extrusion face and the core material supply face is formed in the mold body, a shell material supply cavity surrounding the core material supply channel is formed in the mold body, two fiber channels are formed in the mold body, the two fiber channels are symmetrically arranged up and down, and the fiber channels are arc-shaped bent channels. The forming line body comprises a continuous fiber reinforced co-extrusion die, a core material extruder and a shell material extruder; a shaping module, a vacuum water cooling group, an open type water cooling group and a traction machine are sequentially arranged on the mixed extrusion surface of the mold body. According to the invention, the overall strength and performance of the composite material are optimized, and uniform distribution and orientation of reinforced fibers are ensured.

The invention belongs to the technical field of computer hardware mainboard detection, and discloses a computer hardware mainboard strength detection device which comprises a bottom plate, a connecting seat is fixedly connected to the right side of the bottom plate, two sliding shafts are fixedly installed on the left side of the connecting seat, and sliding blocks are movably installed in the middles of the two sliding shafts. A telescopic hydraulic cylinder is fixedly installed on the left side of the sliding block, and the telescopic end of the telescopic hydraulic cylinder is fixedly connected with an oil storage shell. A detected mainboard is placed on the surfaces of the corner rectangular blocks, the side rectangular blocks and the bottom blocks, the corner pushing rods or the side pushing rods penetrate through the through holes used for installation, then electromagnets are powered on, so that the edges of the mainboard are pressed tightly, and telescopic rods are shortened until the computer hardware mainboard is pressed and fixed through the rectangular plates and the side limiting blocks; therefore, the state of the mainboard in actual use is simulated, and the problem that the strength of the mainboard in actual use cannot be really reflected by the existing detection mode is solved.

The utility model discloses a composite anti-sticking coating with a Ni-Al framework, a stainless steel material and a coating tool. The composite anti-sticking coating comprises a steel material layer, a Ni-Al alloy skeleton layer and an anti-sticking polymer layer, the Ni-Al alloy framework layer is arranged on the upper surface of the steel material layer; the anti-sticking polymer layer is attached to the upper surface of the Ni-Al alloy skeleton layer; the Ni-Al alloy skeleton layer is provided with a porous structure; the porosity of the Ni-Al alloy framework layer ranges from 10% to 50%. The thickness of the Ni-Al alloy framework layer ranges from 100 micrometers to 500 micrometers. According to the scheme, the strength of the anti-sticking coating and the binding degree of the anti-sticking coating on steel can be improved, and therefore the problems that an organic anti-sticking polymer coating is low in strength and prone to abrasion and falling off are solved.

The invention provides 1700MPa-grade hot-formed steel with high cold bending performance and a preparation method and application thereof. The surface layer of the hot-formed steel has a soft-phase ferrite structure, the secondary surface layer of the hot-formed steel has a mixed structure of soft-phase ferrite and martensite, and the core layer of the hot-formed steel has a carbon-poor martensite structure. The preparation method comprises any one or a combination of at least two of the following conditions: (A) the coiling temperature after hot rolling is 650-700 DEG C; (B) the pickling speed is less than or equal to 150m / min; (C) the continuous annealing temperature is 780-830 DEG C; (D) the atmosphere in the furnace is mixed gas of nitrogen and hydrogen; and (E) the dew point temperature is-35 DEG C to-17 DEG C. Through fine component design and process integration, the contradiction between the strength and the toughness of the material is successfully solved, double guarantee of high strength and high toughness is achieved, meanwhile, the requirement for light weight is met, and the competitiveness of an existing product is improved.

The invention belongs to the technical field of biological bacteriostasis and food packaging materials, and particularly relates to a carboxymethyl chitosan-covalent organic framework-nano-silver composite material and a preparation method and application thereof. According to the preparation method of the carboxymethyl chitosan-covalent organic framework-nano-silver composite material, provided by the invention, a metagen is adopted as a reducing agent, and AgNPs is synthesized through a biological method; the COF-AgNPs composite material is prepared by an in-situ growth method, and the ordered porous structure of the COF provides specific constraint for the AgNPs, so that aggregation of the AgNPs is effectively avoided; in addition, COF-AgNPs is added into a CMCS matrix, so that the film-forming ability of the COF-AgNPs is enhanced, and the CMCS matrix is endowed with excellent antibacterial performance and mechanical performance. Therefore, the composite film material prepared by adopting the preparation process can effectively improve the fresh-keeping effect of fruits and vegetables, and has a good application prospect in the field of packaging film materials for fruit and vegetable fresh-keeping.

The invention discloses a production method of a nickel-based composite pipeline steel plate. A base material comprises the following chemical components in percentage by mass: 0.02%-0.04% of C, 0.05%-0.25% of Si, 1.6%-1.65% of Mn, less than or equal to 0.010% of P, less than or equal to 0.0015% of S, 0.025%-0.050% of Alt, 0.03%-0.060% of Nb, 0.010%-0.020% of Ti, 0.20%-0.25% of Cu, 0.24%-27% of Cr, 0.09%-0.13% of Ni and 0.03%-0.04% of V; the composite material comprises the following chemical components in percentage by mass: less than or equal to 0.05% of C, 0.25%-0.50% of Si, 19.5%-23.5% of Cr, 38%-46% of Ni and 0.28%-0.30% of Co. The N08825 + X70 composite pipeline steel with excellent strength is obtained by adopting a vacuum rolling composite technology, a low-speed deformation technology and an ultra-fast cooling technology, the maximum wall thickness of a base material reaches 45mm, and the thickness of the N08825 is 3mm.

The invention belongs to the technical field of oilfield chemistry, and particularly relates to a degradable bio-based system for sand consolidation and profile control as well as a preparation method and application of the degradable bio-based system. The degradable bio-based system for sand consolidation and profile control is prepared from the following components in parts by weight: 15 to 25 parts of 1, 4: 3, 6-dianhydro-D-sorbitol / maleic anhydride biopolymer, 30 to 40 parts of resin, 10 to 15 parts of ethylene glycol dimethyl ether, 5 to 8 parts of flexibilizer, 10 to 12 parts of curing agent and the balance of water according to the total weight of 100 parts. The degradable bio-based system for sand consolidation and profile control provided by the invention not only has good sand consolidation performance and can solve the problem of sand production of a water well, but also has certain effects of blocking a high-permeability layer and adjusting the section of a reservoir near a water injection well, and has the functions of sand consolidation and profile control of the water well.

The invention discloses an ardealite-based road base material and a preparation method thereof, and the material comprises the following raw materials by mass: 84-92% of ardealite, 4-8% of magnesium oxide, 1-3% of magnesium chloride, 1-2% of mineral powder, 0.5-1% of cement, 0.25-0.5% of gypsum, 0.25-0.5% of sodium bicarbonate, 0.25-0.5% of a polymer nanocomposite and 0.25-0.5% of a modifier. Wherein the modifier comprises ferrous sulfate and graphene oxide; the polymer nano composite material comprises nano silicon dioxide and an acrylic emulsion. Through the combined effect of the polymer nano composite material and the modifier, based on a series of principles of improving the surface performance of phosphogypsum particles, optimizing the form and aggregation position of the five-phase product, forming a composite water-resisting layer and the like, the cementing efficiency of the five-phase product is improved, and the technical problems of low strength and poor water stability of phosphogypsum are fundamentally solved.

The invention discloses a refining and purifying method for cast aluminum alloy liquid, which comprises the following steps: firstly, carrying out blowing refining and deslagging treatment on the cast aluminum alloy liquid by using inert gas and a solid powder refining agent, then carrying out blowing refining and dehydrogenation treatment on the cast aluminum alloy liquid by using mixed gas, and carrying out slagging-off and standing to obtain the high-cleanliness cast aluminum alloy liquid. According to the method, powder refining agent injection refining and mixed gas injection refining are combined, so that deep refining purification treatment of the cast aluminum alloy liquid is realized, the harm of air holes and inclusions to the mechanical property of the cast aluminum alloy is eliminated, and the contradictory problem of mutual restriction between strength and plasticity is solved; and the strength and plasticity of the cast aluminum alloy part are improved.

The invention relates to the technical field of rainwater regulation and storage, in particular to a greenbelt system with a rainwater regulation and storage function and a rainwater regulation and storage method. The method comprises the following steps: acquiring different parameter values; obtaining the sludge deposition effect at the water outlet according to the difference between the flow and the flow velocity of the water outlet; obtaining solid flux based on the area of the water outlet, the water flow rate of the water inlet and the water outlet and the suspended solid concentration, constructing a fitting straight line based on the difference value of the solid flux and the suspended solid concentration at the water outlet and the liquid level difference value, and obtaining the sludge blockage degree according to the mean square error and the sludge deposition effect of the fitting straight line and in combination with the correlation coefficient; setting an objective function based on the sludge blockage degree to obtain the optimal water yield, and controlling the current water yield based on the optimal water yield to regulate and store rainwater. The risk caused by sludge deposition is eliminated, and normal operation of the regulation and storage system is ensured.

The invention discloses an HRB500cE hot-rolled corrosion-resistant aseismic steel bar and a preparation method thereof, and relates to the technical field of steel production. The microstructure of the steel bar comprises, by volume, 38-41% of ferrite, less than or equal to 10% of pearlite and the balance bainite. By controlling the content of Cr, Ni and Cu, oxidation of the steel bar can be prevented, and the corrosion resistance and mechanical property of the steel bar are improved; the contents of Nb and V and the contents of other elements are further controlled, the Nb-V composite carbonitride can prevent abnormal growth of austenite grains, the effect of refining ferrite grains is also achieved in the cooling process of austenite transformation, the lamellar spacing of pearlite is refined, and meanwhile a certain amount of bainite is obtained. According to the structure concept, the strength of the steel bar can be guaranteed, the corrosion resistance of the steel bar is improved, meanwhile, the extension plasticity of the steel bar is not reduced, and the problem that the strength and plasticity of the high-strength corrosion-resistant HRB500cE steel bar are difficult to consider at the same time is effectively solved.

The invention discloses a low-cost super-corrosion-resistant high-strength wrought magnesium alloy and a preparation method thereof, and relates to a magnesium alloy and a preparation method thereof. The problems that the non-rare earth magnesium alloy is poor in corrosion performance and low in strength are solved. The magnesium alloy disclosed by the invention is an Mg-Al-Zn-Mn-Ca alloy; the preparation method comprises the following steps: weighing a magnesium ingot and an intermediate alloy according to alloy element components, and carrying out simple alloy smelting, solid solution, aging treatment and extrusion thermal deformation to obtain the super-corrosion-resistant high-strength wrought magnesium alloy with excellent comprehensive performance. According to the magnesium alloy, the problem that the corrosion resistance and the strength of the magnesium alloy are not matched is solved, the corrosion resistance effect is remarkably improved, the good corrosion resistance is achieved, the alloy has the uniform organization structure, the comprehensive mechanical property is good, and the cost is low; the preparation method provided by the invention is simple in equipment requirement, short in technological process, convenient to operate, high in preparation efficiency, relatively low in cost and suitable for large-scale production.

The invention discloses ultrahigh-plasticity hot-rolled austenitic stainless steel and a preparation method thereof, and belongs to the technical field of austenitic stainless steel production and manufacturing. The preparation method comprises the following steps: smelting and pouring according to a certain mass percent of chemical components to obtain a steel billet, homogenizing the steel billet, and forging the steel billet into a square billet; performing multi-pass hot rolling on the square billet to obtain a hot-rolled plate, performing interrupted solution treatment on the hot-rolled plate, and performing water cooling to room temperature; by controlling element selection of C, Cr, Mn, Ni and N and cooperating with a multi-pass hot rolling-solid solution interruption preparation method, an austenite structure after complete recrystallization is regulated and controlled firstly, then part of austenite is recrystallized again through low-temperature solid solution, and high mechanical stability and excellent strong plasticity are obtained based on two recrystallization behaviors.

The invention discloses high-performance uniform subsea pipeline steel and a manufacturing method thereof. The high-performance uniform subsea pipeline steel comprises the following chemical components in percentage by weight: 0.02 to 0.06 percent of C, 0.10 to 0.30 percent of Si, 1.20 to 1.65 percent of Mn, less than or equal to 0.30 percent of Cu, less than or equal to 0.30 percent of Ni, 0.15 to 0.30 percent of Cr, less than or equal to 0.15 percent of Mo, 0.03 to 0.05 percent of Nb, less than or equal to 0.05 percent of V, 0.008 to 0.020 percent of Ti, 0.0012 to 0.0030 percent of Ca, 0.015 to 0.045 percent of Al and the balance of Fe and inevitable impurities. In addition, impurity elements such as P < = 0.01%, S < = 0.001%, B < = 0.0004%, N < = 0.005%, O < = 0.0025% and H < = 0.0002% need to be controlled. According to the manufacturing method of the subsea pipeline steel, an austenite recrystallization zone and non-recrystallization zone two-stage controlled rolling technology, broadening ratio control and controlled cooling are adopted, and the obtained subsea pipeline steel has good performance uniformity on the basis of having high performance.

The invention discloses a preparation method and application of a polylactic acid / chitosan double-layer membrane with oxidation resistance. The preparation method is characterized in that a polylactic acid / chitosan double-layer film is prepared by a solution casting method, the inner layer is a chitosan film, and the outer layer is a polylactic acid film; glycerol is used as a plasticizer, and one of tea polyphenol, a bamboo leaf antioxidant, phytic acid, a rosemary extract and ascorbic acid is used as an antioxidant to be added into the chitosan solution to prepare a chitosan-based membrane solution; polylactic acid is dissolved in dichloromethane to prepare a polylactic acid membrane solution; and drying and molding the chitosan-based membrane liquid, pouring the chitosan-based membrane liquid into the polylactic acid membrane liquid, and removing the solvent to obtain the polylactic acid / chitosan double-layer membrane. The polylactic acid and the chitosan are used as base materials of the double-layer film, and the natural antioxidant is introduced, so that the mechanical property and the oxidation resistance of the double-layer film are effectively improved.

The invention relates to the technical field of aluminum alloys, in particular to a method for enhancing the strength and plasticity of an aluminum alloy, which comprises the following steps: carrying out ultrasonic vibration and high-pressure co-treatment on the aluminum alloy to separate out a precipitation strengthening phase in the aluminum alloy and uniformly distribute the precipitation strengthening phase. According to the method, ultrasonic vibration and high-pressure treatment modes are combined, and the microstructure morphology and precipitate distribution of the aluminum alloy are promoted by utilizing the precipitation strengthening characteristic in the aluminum alloy strengthening process, so that the comprehensive performance of the aluminum alloy is improved; the yield strength and the tensile strength are remarkably improved while the elongation of the aluminum alloy is kept basically free of loss, and the problem of contradiction between the strength and the plasticity of the material is effectively solved; compared with the traditional heat treatment method, the method disclosed by the invention can be carried out at room temperature, reduces the aging heat treatment link, reduces the emission of harmful substances, is more energy-saving and environment-friendly, is simple and feasible in treatment process, has higher economical efficiency and industrial application prospect, and lays an important foundation for the application of the production process.

The invention belongs to the technical field of freight unmanned aerial vehicle delivery, and relates to an intelligent cabin door system for an unmanned aerial vehicle and a cabin door structure design method. The system comprises a driving system, a reel system, a curtain plate system, a sliding rail unit and a control unit. The control unit is electrically connected with the driving system; the driving system is arranged on the unmanned aerial vehicle body; the curtain plate system is connected with an unmanned aerial vehicle body through the sliding rail unit, the curtain plate system is connected with the reel system, the driving system is in transmission connection with the reel system through a chain wheel transmission structure, and the driving system drives the reel system to rotate so as to drive the curtain plate system to stretch or retract along the sliding rail unit. Opening and closing of the cabin door are realized. According to the invention, the number of moving parts is greatly reduced, the probability of clamping stagnation and wear failure of a mechanical transmission mechanism is fundamentally reduced, and the operation reliability of a cabin door system in harsh operation scenes such as emergency logistics and disaster rescue is remarkably improved.

The invention relates to a glass-based photoelectric volume pulse wave cover plate material as well as a preparation method and application thereof. The cover plate material comprises: a glass substrate; the annular structural part is embedded in the glass substrate; the annular structural member and the glass substrate are made of the same material; the glass substrate comprises the following components in percentage by mass: 0.1 wt%-0.2 wt% of BaO; 0.1 wt% to 0.6 wt% of PbO; 0.1 wt% to 0.7 wt% of Sb2O3; 25 wt%-61 wt% of SiO2; 16 wt% to 18 wt% of B2O3; 10 wt% to 15 wt% of Al2O3; 8 wt% to 12 wt% of R2O; wherein R2O is composed of Li2O, Na2O and K2O, and the content of K2O is smaller than that of Na2O. The technical problem to be solved is to provide the cover plate material with a large number of sensor optical channels, so that the cover plate material has high transmittance and high crosstalk resistance, a plurality of optical paths can be formed in the cover plate material, and the problems of scattering and the like in the light propagation process are reduced by selecting single glass with a specific formula, so that the light transmission efficiency is improved. The energy loss in the light ray propagation process is reduced, and the propagation distance of the light rays in the glass cover plate is increased; meanwhile, the glass cover plate also has higher mechanical strength.

This utility model discloses a spiral-grooved vibration-damping tapered shank cutting tool, relating to the technical field of BT-type tapered shank cutting tools. Specifically, it is a spiral-grooved vibration-damping tapered shank cutting tool, comprising a flange and a BT-type tapered shank. The surface of the BT-type tapered shank is provided with spiral grooves, which are filled with elastic damping material. This spiral-grooved vibration-damping tapered shank cutting tool, by designing spiral grooves in the BT-type tapered shank and filling them with elastic damping material, utilizes the multi-head spiral structure of the spiral grooves to disperse vibration energy in multiple directions. At the same time, the elastic damping material absorbs high-frequency vibrations through shear deformation. This "rigid-flexible composite" structural design solves the contradiction between vibration suppression and structural strength in BT-type tapered shank cutting tools, and also provides high structural reliability without affecting the original strength of the BT-type tapered shank. It offers a BT-type tapered shank cutting tool that combines high rigidity, good vibration reduction performance, and low manufacturing cost.

The application belongs to the chip packaging technical field, and particularly relates to a running control method based on a heterogeneous optoelectronic chip, steps of which are as follows: S101, obtaining a task quantity of a to-be-calculated task; and judging whether the task quantity is greater than a set first calculation threshold; when the judgment result of step S101 is yes, then step S102 is executed, that is, a type one photonic chip is recommended for the to-be-calculated task to execute calculation; when the judgment result of step S101 is no, then step S103 is executed, that is, a recommended calculation time consumption of the to-be-calculated task is obtained, and whether the recommended calculation time consumption of the to-be-calculated task is less than a set time length is judged; when the judgment result of step S103 is yes, then step S104 is executed, that is, a type two photonic chip is recommended for the to-be-calculated task to execute calculation; when the judgment result of step S103 is no, then step S102 is executed. The control method can realize flexible switching and stable high-speed running of the optoelectronic chip in an extreme environment.

The application provides a 1700MPa-grade hot forming steel with high cold bending performance and a preparation method and application thereof. A surface layer of the hot forming steel has soft ferrite structure, a subsurface layer has mixed structure of soft ferrite and martensite, and a core layer has carbon-poor martensite structure. The preparation method comprises any one or a combination of at least two of the following conditions: (A) the coiling temperature after hot rolling is 650-700 DEG C; (B) the pickling speed is less than or equal to 150 m / min; (C) the temperature of continuous annealing is 780-830 DEG C; (D) the atmosphere in the furnace is a mixture of nitrogen and hydrogen; (E) the dew point temperature is-35 DEG C to-17 DEG C. Through fine component design and process integration, the application successfully solves the contradiction between material strength and toughness, realizes double guarantee of high strength and high toughness, simultaneously meets the light weight requirement, and improves the competitiveness of existing products.

The invention discloses an anti-scouring tundish dry material, and relates to the technical field of tundish refractory materials, and the tundish dry material comprises the following raw material components by mass: 28-32% of 3-1mm fused magnesite, 10-20% of alumina powder, 10-20% of alumina powder, and the balance of alumina powder. The invention relates to an ultra-low thermal conductivity refractory brick which comprises the following components in percentage by weight: 22-30% of 1-0mm fused magnesia, 20-28% of 200-mesh fused magnesia, 3-4.5% of phenolic resin, 1-1.4% of rectorite powder, 0.2-0.3% of SiO2 aerogel powder and the balance of 5-3mm fused magnesia. According to the ultra-low thermal conductivity refractory brick, the special layered structure of the rectorite powder and the ultra-low thermal conductivity of the SiO2 aerogel powder are ingeniously utilized; through the synergistic effect of the two components, the tundish dry material successfully solves the problems of insufficient strength and poor thermal insulation performance on the basis of keeping the original good fire resistance, and the efficiency and economical efficiency of a continuous casting process are remarkably improved.

The invention discloses a four-door two-cover flexible trimming die switching system, and relates to the technical field of automobile manufacturing equipment.The four-door two-cover flexible trimming die switching system comprises a lightweight trimming die unit and a switching mounting base, and the lightweight trimming die unit is detachably mounted on the switching mounting base through a robot grabbing device; the bottom of the light-weight edge rolling die unit is provided with a gun changing disc butt joint part, and the switching installation base is provided with an electric quick-plug device and a positioning locking device which are matched with the gun changing disc butt joint part. According to the invention, a split type framework of the lightweight trimming die unit and the switching mounting base is adopted, and a full-automatic die switching system is constructed through a robot automatic grabbing and gun changing disc rapid butt joint technology. A gun replacing disc butt joint part arranged at the bottom of the die body, an electric quick-plug device of the base and a positioning locking device form a standard interface, and a robot is matched for accurate grabbing and positioning, so that the die replacing process is optimized from traditional manual hoisting calibration to machine autonomous recognition butt joint.