87results about How to "Reduce edges and corners" patented technology

Disclosed is a preparing method for casting an inlaid ceramic/metal wear-resisting compound liner. A chemical vapor deposition method is adopted to prepare uniform, continuous and high-purity metal activation coatings on ceramic monomers in various shapes, the kind and the structure of the coatings are changed, wettability between ceramic and metal in the compound process is improved, and the compound quality is improved; finally, through the lost foam casting technology, that is, ceramic reinforcements with the metal activation coatings deposited are fixed into a polystyrene foam model, and casting molding of molten metal is carried out; solid ceramic serves the reinforcements, the ceramic reinforcements are subject to reasonable structural design, and volume fractions and distribution of the reinforcements are controlled; and through forming of the activation coatings on the surfaces of the ceramic reinforcements, the interface combination condition between the ceramic and the metal is improved, operation is simple, easy to implement and low in cost, and the inlaid ceramic/metal wear-resisting compound liner which is good in comprehensive performance and capable of meeting various complex working conditions can be prepared.

An aircraft comprising a fuselage, thin supersonic wings on the fuselage, there being trailing edge flaps carried by the wings, the flaps configured to provide flap deflection to simultaneously control wing twist and to reduce drag, when the aircraft is operated at subsonic flight conditions.

The invention discloses a preparation method of a hexaazaisowurtzitane crystal. The preparation method of the hexaazaisowurtzitane crystal comprises the following steps of: carrying out wet-crushing onto explosives until the particle dimension is 0.1 micron to 5 microns, centrifuging, washing, freezing and drying the crushed materials; placing the material in the step I to a solvent for carrying out ultrasonic treatment, heating, re-filtering, washing and drying under the standing condition or the stirring condition to obtain a hexaazaisowurtzitane explosive crystal. According to the preparation method of the hexaazaisowurtzitane crystal, the high-quality explosive crystal product, which is prepared by a preparation technology adopting a two-step process including mechanical crushing and solvent thermal-induction growing, is regular in particle shape, jewel-shaped, uniform in particle dimension, smooth in surface, less in internal defects of the crystal, and lower in mechanical sensitivity. Besides, the preparation method of the hexaazaisowurtzitane crystal is simple in process, gentle in reaction conditions, good in reproducibility, high in yield and suitable for large-scale industrial production.

The preparation process of red phosphor includes: mixing Eu2O3, Y2O3 and MgO, Al(NO3)3 or Sb2O3 to form mixture, adding HNO3 solution and citric acid and heating at 60-100 deg.c to prepare red phosphor mother liquid; compounding oxalic acid solution with oxalic acid and deionized water, adding ethanol and heating to 80 deg.c; mixing red phosphor mother liquid with H2O2 at 25-30 deg.c and heating to 80 deg.c, adding the oxalic acid solution to produce precipitate, filtering, washing the precipitate with deionized water and stoving at 90 deg.c in stove for 2 hr; initial roasting of the precipitate in high temperature furnace and cooling; adding to the roasted product with one or two kinds of fluoride, chloride, phosphate or carbonate of alkali metal and alkali earth metal, secondary roasting in high temperature furnace, cooling, washing with dilute nitric acid, washing with deionized water and stoving to obtain the red phosphor.

The invention provides a rare earth luminescent material preparation method containing crystal defect repair technology and a product thereof to overcome disadvantages in synthesis of garnet activated rare earth aluminate fluorescent materials in the prior art. The preparation method comprises the following four steps: preparation of clinker; preparation of clinker blended with a raw material; preparation of a fluorescent powder material having undergone secondary annealing; and preparation of the finished fluorescent material. The finished fluorescent material prepared by using the method has external quantum efficiency of 0.706 to 0.745 and internal quantum efficiency of 0.953 to 0.992 in a temperature range of room temperature to 150 DEG C. The invention has the following beneficial technical effects: the raw material is used to replace an activator during secondary reduction; and in virtue of cooperative action of surface modification and secondary reduction thermodynamics, crystal defects are eliminated, and internal quantum efficiency and photo-thermal stability of the Ce<3+> activated garnet structure rare earth aluminate luminescent material are improved.

The present invention relates to a pill box for splitting pills into halves. The pill box comprises a cover and a base which are connected pivotally by a staff. The cover has a blade holder inside, which has a plug pin at the bottom. At the bottom of the cover, there is a partition with an opening. The base has a pill receptacle and a slot. When the blade holder moves down, the blade and the plug pin pass through the opening. The blade cuts at the position of the pill receptacle and the plug pin plugs into the slot. The cover and the base are locked together. When the blade holder moves up and the plug pin completely moves out from the slot, the cover or the base can rotate out with the staff as a pivot. The present invention is safe, reliable, small and portable.

The invention belongs to the technical field of titanium dioxide production, and particularly relates to a method for improving whiteness of titanium dioxide by adjusting granularity. In the prior art, the particle size of titanium dioxide particles is not well controlled in a titanium dioxide production process, so that the whiteness of the titanium dioxide product is not high. Based on the problem in the prior art, the method of the invention comprises: crushing, acidolysis, sedimentation, hot filtration, crystallization, ferrous separation, hydrolysis, primary water washing, bleaching, secondary water washing, salt treatment, pre-kiln filter pressing, calcination, intermediate crushing, coating, tertiary water washing, drying and jet milling, wherein in the bleaching step, a calcined seed crystal with a fraction content of 1.5-2.5% into a slurry based on the Ti content calculated as TiO2 in the slurry. The method the invention is used for producing high-whiteness titanium dioxide.

The invention discloses an unmanned aerial vehicle for air route survey of air traffic. The unmanned aerial vehicle comprises an unmanned aerial vehicle head, an unmanned aerial vehicle body, a pair of side wings, a first balance wing, a second balance wing and a balance tailstock, wherein a radar height sensor, a Beidou positioning sensor, an ultrasonic detector and an infrared detector are arranged in the unmanned aerial vehicle head; a storage battery and a signal match are arranged in the unmanned aerial vehicle body, and an electric quantity detector is arranged below the unmanned aerialvehicle body; an information processor is arranged next to the electric quantity detector, and a command locker is arranged next to the information processor; a signal receiver is arranged below the command locker, and a wireless charging receiver is arranged below the signal receiver; and a positioning camera is arranged next to the wireless charging receiver, and a positioning supporting foot isarranged at the lower end of the unmanned aerial vehicle body. The unmanned aerial vehicle can maintain good stability and balance performance when encountering obstacles, severe weather and other special environments, self-charging can be realized, a locking mechanism is provided, instructions cannot be input from the outside during locking, and the situation of falling caused by the power consumption of the unmanned aerial vehicle when the unmanned aerial vehicle is instructed by the outside can be avoided.

A composite additive for coal-burning sulfur-fixing catalytic combustion, which is composed of a main sulfur-fixing agent and an auxiliary additive. The main sulfur-fixing agent is composed of dolomite powder and slaked lime, and the auxiliary additive is one of alumina, cerium oxide, iron oxide and quartz sand. or a combination of two or more in arbitrary proportions; its preparation method is: firstly crush dolomite powder and slaked lime to 80-300 mesh respectively and mix them according to the mass percentage, and then mix the selected auxiliary additives uniformly according to the mass percentage to prepare compound additives. The invention has the advantages of: excellent sulfur fixation effect, catalytic combustion performance and coal-saving performance; the product generated by catalytic combustion contains CaO-Al2O3-SiO2 system substances, which can wrap glassy quartz fragments in fly ash, making the original sharp The edges and corners are reduced, which reduces the wear of the fly ash on the pipeline; the preparation method is simple and easy to implement, and can be widely used in coal-fired fields such as industry, civil boilers, casting, and metallurgical power generation.

The invention belongs to the field of concrete ground hardening agents, and particularly discloses a dry-scattering ground hardening agent and an using method thereof. The dry-scattering ground hardening agent is prepared by uniformly mixing the following raw materials in parts by weight: 320 to 350 parts of cement, 15 to 20 parts of silica fume, 750 to 800 parts of copper slag and 4 to 6 parts ofa water reducing agent. The dry-scattering ground hardening agent is prepared by taking copper slag undergoing treatment and grading optimization as aggregate, so that the wear resistance, surface strength, impact resistance and oil resistance of the ground are improved greatly. Meanwhile, the problem of high aggregate cost in the conventional alloy aggregate and metal aggregate dry-scattering ground hardening agents is solved, and a novel way is provided for the efficient recycling utilization of the copper slag.

The invention discloses a lost foam casting coating for gray cast iron and a preparation method of the lost foam casting coating. The lost foam casting coating comprises an aggregate, a binder, a suspending agent, a surfactant, a defoaming agent, water and a preservative, wherein recovered pill-cleaning dust is adopted as one part of the aggregate; the finally prepared coating is good in air permeability; a high-temperature gas can be rapidly and almost invariantly discharged out of a coat when a thick-walled casting is poured; carbon black and blowhole defects are reduced to the minimal extent; in addition, absence of an adhesive sand defect is also ensured; the lost foam casting coating can be mixed evenly by the preparation method disclosed by the invention; and later use is facilitated. The lost foam casting coating is suitable for preparation of the lost foam casting coating.

The invention relates to the technical field of the concrete repair and in particular to a concrete crack repairing material based on a phosphorus magnesium material and a construction technology thereof. The concrete crack repairing material based on the phosphorus magnesium material is obtained by mixing monoammonium phosphate, magnesium oxide, borax or boric acid, an additive, an admixture andaggregate according to a specific proportion, and in a repairing process of a concrete crack, interface treatment does not need to be performed. The prepared concrete crack repairing material based onthe phosphorus magnesium material has the characteristics of short coagulation time, high compressive strength in early stage, high breaking strength, high bonding strength, low dry shrinkage rate, good durability, high abrasive resistance and the like, and is capable of solving problems in the prior art that cost is high, ageing is easy and service life is short, the material is harmful to a human body in a construction process, the construction technology is complicated, the bonding strength of a bonding surface of old and new materials is low, integrality of a repairing structure is weak,longer maintenance time is needed and the like.

The invention discloses a method for preparing special 3-nitro-1,2,4-triazole-5-ketone. The method comprises the following steps: providing a 3-nitro-1,2,4-triazole-5-ketone solution; and cooling the 3-nitro-1,2,4-triazole-5-ketone solution with a cooling medium and crystallizing to obtain the special 3-nitro-1,2,4-triazole-5-ketone. According to the provided method, a recrystallization technology is employed for increasing crystal density of a single-compound explosive, reducing internal defect of the crystal, and eliminating surface defects, so that the surface is smooth and dense, crystal shape and granularity can be controlled, quality of the single-compound explosive is enhanced, and moulding performance can be satisfied.

The invention relates to the technical field of terraces, in particular to a ground surface course based on a phosphorus and magnesium material and a construction process thereof. The ground surface course based on the phosphorus and magnesium material is formed by combining magnesium phosphate cement, an additive, an admixture, a pigment and an aggregate in a specific proportion. The ground surface course based on the phosphorus and magnesium material has high strength, wear resistance and bonding property and can be constructed anytime without construction joints. The content of volatile organic compounds (VOCs) is zero, and the ground surface course has very good fire resistance. The ground surface course is high in early strength, short in setting time, short in maintenance time, highin mechanical strength, unlike to crack, high in fracture resistance, wear-resistant and short in construction period and can be put into use immediately. By means of a paving process using a laser paver, a level ground is paved by the precision laser paver, the ground smoothness and levelness can be improved by over 3 times, and the compactness and strength can be improved by over 20%, and meanwhile, the work efficiency can be also improved and the labor is saved. The whole paved matrix is homogenous and compact.

A membrane method processing system and process for a high-concentration salt-containing organic waste liquid incineration exhaust gas is described. The system consists essentially of a waste liquid incinerator (I), a gas-solid separator (II), a heat exchanger (III), an air blower (IV), an anti-caking agent storage tank (V), a membrane method dust cleaner (VI), an induced draft fan (VII), a check valve (VIII), and a desulfurization tower (IX). The present invention introduces the dust collecting membrane into the tail gas treatment system and utilizes the small pore size and high porosity of the dust collecting membrane to prevent inorganic salt particles from entering the internal of the filter material and agglomerating there. When the humidity of the gas entering the dust collector increases during the dust removing process, the anti-caking agent is also introduced into the tail gas treatment system to change the surface structure of the inorganic salt crystal to prevent the crystal from agglomeration.

The invention discloses a machining technology for optical lens rounding to mainly solve the problems of corner angles, chamfers and radians existing in the existing optical lens machining process. A centerless grinding machine main shaft grinding wheel is utilized for carrying out optical lens peripheral grinding, and the bottom of an optical lens is ground to be round; then, the rotating speed of a main grinding wheel and the rotating speed of a main shaft wheel are adjusted so that fine grinding can be directly carried out; finally, cleanout fluid is used for cleaning the optical lens under the action of ultrasonic waves, and the purpose that technology meets the requirement for 360-degree radians of the final optical lens is achieved. According to the technology, the machining procedure of the machining technology of the optical lens is effectively simplified; fast forming is achieved; the production cost is effectively saved; the finished product pass percent is greatly increased.

The invention discloses a method and an apparatus for improving square degree and corrosion resistance of a demagnetizing curve of sintered neodymium iron boron. The apparatus comprises an air blowing apparatus and a quick coagulating sheet coarse crushing apparatus; according to the method, after a quick coagulating sheet is obtained and before a hydrogen decrepitation process is performed, a quick coagulating sheet cleaning and coarse crushing process is added, wherein the cleaning of the quick coagulating sheet is performed by enabling the quick coagulating sheet to pass through an air blowing wind belt so as to clean dust and needle-shaped amorphous neodymium iron boron alloy and other impurities, attached to the surface of the quick coagulating sheet, through wind power; the cleaned quick coagulating sheet is rolled and crushed by a reversely rotating roller with a rough surface; and next, subsequent processing of hydrogen decrepitation, airflow milling and the like is performed. By virtue of air-blowing wind power, foreign matters on the surface of the quick coagulating sheet can be effectively removed; and meanwhile, foreign matters are not introduced again, so that the component and structural uniformity of the base magnet are finally improved, and black spots on the surface after acid washing or electroplating are reduced, thereby improving the square degree and corrosion resistance of the demagnetizing curve of the magnet.