163results about How to "Good shape consistency" patented technology

A method and device for cold rolling and expanding processing of inner and outer spherical metal rings, relating to the technical field of bearing parts processing; what is to be solved is the technical problem of processing inner and outer spherical metal rings of bearing parts; the inner and outer spherical The method for processing metal rings includes the following steps: 1) steel reforming, wherein metal bars are transformed into rings; 2) material is softened, and the rings are subjected to heat treatment to obtain lower hardness so as to facilitate cold rolling; 3) cold rolling blanks Preparation, the ring is processed into a certain precision cold rolling blank by cutting; 4) cold rolling forming, the cold rolling process is performed, the outer circular concave groove of the rolling wheel and the outer cylindrical convex shape of the mandrel in the mold part The grooved shaft enables the workpiece to be formed, and the thrust surfaces of the supporting roller and the support wheel are used to stabilize the workpiece position and limit the axial movement of the workpiece. The invention has the characteristics of improving the mechanical properties of the ring parts, high production efficiency, good shape consistency of workpieces, high processing precision and high material utilization rate.

The present invention relates to preparation process of superfine cerium oxide powder, and belongs to the field of the preparing technology of RE compound. The preparation process of superfine cerium oxide powder includes the following steps: preparing salt solution containing cerium ion, adding surfactant into the solution, contacting the solution with alkali matter to control the pH value of the reaction suspension and produce precipitate; converting the suspension with oxalic acid and controlling the pH value in the reaction end point; filtering, washing and drying the precipitate, scalding at 600-1000 deg.cto obtain the superfine cerium oxide powder of grain size 10 nm to 3 micron and specific surface area smaller than 50 sq m/g. The superfine cerium oxide powder is used as polishing material, especially for optical mask.

The invention provides a molding method for casting and forging a structure piece of a wheelchair frame, which comprises the steps of: sawing and cutting an aluminum cast ingot with the outer circle of phi 200mm with a material trade mark of 6061 into blank with the length of 800mm; smelting; pouring; modeling; cutting a dead head; charging a casting blank, heating and fixing the temperature at 530 DEG C; forging and pressing the casting blank by a 5000-ton oil press and a forging mould; forging and pressing to obtain a forged piece; etching and washing; treating with solid solution; and manually correcting the specific deformation degree of the forged piece. The precast blank is cast and molded by the method, the shape of the blank is good in consistency, the shape of a curved surface iseasy to control, a casting material can be cyclically utilized, and the material utilization can be furthest improved; and the batch production practice proves that the finished forged piece producedby a casting and forging technological process has no forging defects, the thermal treatment performance meets the demand, and the final status of the forged piece completely accords with user demand.

The invention discloses a manufacturing method for a large thin-walled impeller. An upper mold body of a mold is internally provided with annular grooves and exhaust plugs so that exhausting can be improved, a cooling cone is arranged on the upper mold body and cooling rings are arranged on the upper surface of the upper mold body so that the cooling speed of castings can be increased, and meanwhile a sand mold is used at the bottom of a gypsum core so that heat preservation of molten aluminum at the bottom and feeding of the castings can be facilitated. The program allowing integral casting of the thin-walled and large-size impeller to be achieved by improving exhausting and cooling is adopted for the mold, the forming quality is good, and precision is high; a first concave part is arranged to position the first circular face of the end portion of the impeller, the impeller is locked to a bottom plate through first pressing pieces, welding is not needed, and fixation is convenient and rapid; and after the first round of machining is conducted on the impeller, a second concave part is arranged to position the second circular face of the impeller, fastening is conducted through second pressing pieces, machining is conducted on the impeller in order, the situation that some faces are not machined due to clamps or other reasons is avoided, and the surface precision of the impeller is improved.

Disclosed in the invention is a manufacturing method for an electrode of a lithium niobate optical waveguide device. The manufacturing method comprises the following steps: using SiO2 as a mask and manufacturing an optical waveguide by using annealing proton exchange processing; utilizing the SiO2 mask as a mark to directly carry out self-alignment overlaying on the optical waveguide and an electrode graph; removing the SiO2 mask of the electrode zone by employing a method of combination of dry etching with wet etching; and utilizing sputtering and metal stripping technologies to manufacture the electrode graph and removing the residual SiO2 mask. When the method is used, the electrode graph can be formed at the lithium niobate optical waveguide and accurate overlaying between the optical waveguide and the electrode is ensured; the edge of the electrode is smooth; the defects are less; and the yield is high.

The invention relates to a forming method of a multi-conductor parallel winding element. The forming method provided by the invention is technically characterized by comprising the following steps: connecting N solid wires in parallel, and overlapping and fixing the middle parts of the solid wires by use of insulating tapes so as to form an integral wire; bending the integral wire into a U shape and dismantling the insulating tapes; and performing 1/2 overlapping by taking the bent part of the U shape of the integral wire as a center and performing drawing formation according to winding element chart requirements. The multi-conductor parallel winding element produced by the method provided by the invention has the advantages that the end socket of the element has no conductor separation phenomenon, the integral shape consistency is good and no conductor insulation damage is caused. When the stator/rotor winding of a motor is subjected to wire inserting, the element can be put into a groove easily, the size of a winding head after wire inserting is small, and the end sockets of the element are uniformly arranged in order, so that the insulation damage caused by squeezing and collision among conductors at the winding head of the motor winding being subject to wire inserting can be avoided, the turn-to-turn short circuit fault of the motor winding can be effectively prevented from being caused, and the insulating property of the motor winding and the heat dissipation performance of the winding head are improved.

The invention discloses a manufacturing method of multifunctional drill hard alloy, which comprises the following steps of: placing hard-phase powder into an airflow pulverizer to be pulverized, then placing the pulverized material into a blending ball mill to be blended and ground to form slurry, filtering, drying and screening the slurry be pressed, squeezed and molded to form the multifunctional drill hard alloy. Through a high-energy breaking and airflow grading method, the hard-alloy powder with inherent defect is broken with brute force and then is shaped so as to give high energy to the surface of the hard phase, to reduce the defect of the hard-phase powder and to improve the powder energy; and through high-speed and high-efficient mixing and shaping, components are more uniformly mixed, and the consistence of the powder appearance can be improved, so that the alloy tissue crystal granularity is uniform in size, the consistence of the grain shape is good, no refined particle and oversized particle exist, the granularity is centralized, and no internal defect exists; and finally the performance of the multifunctional drill hard alloy material can be improved.

The invention discloses a laminated lithium battery aluminum shell structure and a manufacturing method thereof. The structure comprises a shell bottom and a shell wall, wherein the shell bottom is completely located in the shell wall, the peripheral outline of the shell bottom is attached to the shell wall with a 0-0.2 mm gap reserved on each side, and the shell bottom and the shell wall are connected through friction stir spot welding. The laminated lithium battery aluminum shell structure manufactured with the method is high in strength reliability and sealing performance, neat and attractive in appearance, and capable of improving the shape consistency of batteries.

The invention discloses a metal halide lamp arc tube shrank neck shell interlocking machine and the shaping and neck shrinking method thereof. The interlocking machine comprises a machine frame (1), a clamp head and driving and reversing mechanism (2), a mould driving and reversing and mould closing shaping mechanism (3), a fire head moving mechanism (4), an automatic blanking mechanism (5), an automatic feed mechanism (6), a shrank neck trolley driving and reversing mechanism (7) and a fire head air supplying mechanism (8). The shaping and neck shrinking method comprises preheating, material piling, strongly burning, mould closing, and shrank neck heating and shrinking neck. Using the invention and the shaping and neck shrinking method ensure that the appearance and the size of the shell have good consistency and even wall thickness. The internal hole on the shrank neck part is controllable with good consistency, high production efficiency and rate of finished products.

A method for preparing nano copper powder through a fluorocarbon surfactant comprises the following steps that (1) an anionic fluorocarbon surfactant, a nonionic surfactant, an assistant, CuSO.5H2O and water are proportionally selected to prepare microemulsion; (2) the microemulsion is subjected to electrodeposition, and nano copper powder mixed liquor is obtained; (3) nano copper powder is extracted, the nano copper powder mixed liquor is subjected to filtering or centrifugal treatment, and after suction filtration and drying, nano copper powder is obtained; and (4) the nano copper powder isput into a packaging bag, and the packaging bag is sealed and stored after inert gases are injected into the packaging bag. According to the nano copper powder prepared through the method, the particle size is 20-100 nanometer, the purity is 99% or above, distribution of the particle size is uniform, and the appearance consistency is good; in the preparation process, the copper powder does not adhere to a cathode plate, the self-desorption performance is good, the cathode plate is easy to clean, and automatic continuous production can be achieved; the corrosion amount of an anode plates is small, environment pollution is small, and energy consumption is low; and the prepared nano copper powder is good in dispersity and easy to collect.

The invention relates to a method for preparing carbon-film-coated tungsten oxide nanospheres in one step by using a hydrothermal process and application of the carbon-film-coated tungsten oxide nanospheres. The method comprises the following steps: respectively acquiring tungstate and a carbon source according to a mass ratio of 1: 0.5 to 1: 5, adding the tungstate and the carbon source into deionized water, and carrying out sufficient dissolving to obtain a mixed solution; putting the mixed solution into a reaction kettle, and performing natural cooling after a hydrothermal reaction to obtain a reacted turbid liquid; and cleaning and centrifuging the reacted turbid liquid with deionized water and ethanol, and performing vacuum drying to obtain the carbon-film-coated tungsten oxide nanospheres. The invention also provides a glucose detection sensor electrode prepared from the carbon-film-coated tungsten oxide nanospheres. Compared with the prior art, the preparation method disclosed by the invention has the advantages of simple process, safety, reliability and the like, and the formed detection electrode has the characteristics of high sensitivity, strong anti-interference performance, capability of monitoring blood glucose of a human body in a measurement range and the like.

The invention relates to a round setting technique for a pipe end of a large-size pipe fitting. The round setting technique is characterized by comprising the following steps: firstly, preparing an end face of a pipe blank by swelling an inner swelling petal mould so as to cause the uniform peripheral stretching plastic deformation on the end face of the pipe blank, thereby increasing the perimeter of a geometrical neutral layer of the cross section of the pipe end; pressing the end face of the pipe blank by two semicircular petal moulds along the radial direction so as to cause the uniform compressing deformation on the end face of the pipe blank, thereby controlling the last ovality and cross-section perimeter size of the pipe end of the pipe blank; and controlling the molding precision of the pipe end within a tolerance allowed scope. The round setting technique has the advantages that the consistency of shape and size of the pipe end of the pipe blank is increased, the pipeline connection is conveniently performed and the production efficiency is increased at the same time.

The invention discloses an all-in-one thin film temperature sensor. A final product profile map of the invention is an NTC temperature sensor which comprises an upper thin film layer and a lower thin film layer, wherein at least two conducting wires are covered between the upper thin film layer and the lower thin film layer, and an NTC thermistor is welded between the conducting wires. The all-in-one thin film temperature sensor has the advantages that the NTC temperature sensor has good appearance consistency; the NTC temperature sensor has good responding speed consistency; equipment has a high degree of automation, and less staffs are required; and mass production can be realized easily.

The invention belongs to the technical field of metallized thin film capacitors, and particularly relates to a moisture-proof thin film capacitor and a preparation method thereof. According to the moisture-proof thin film capacitor provided by the invention, a low square resistance metal layer is added to a metallized film, when two metallized films are wound to form a film roll, the low square resistance metal layer does not form a string structure, thereby avoiding the influence on the other characteristics of the capacitor. Moreover, the low square resistance metal layer generates the riskof generating a corona effect, thus the risk of generating the corona effect is reduced, and meanwhile the speed of corona diffusion can be effectively reduced. Therefore, the low square resistance metal layer blocks the moisture, and meanwhile reduces the transfer rate of the moisture, thus ensuring the service life of the capacitor.

The invention discloses a method for producing crystal bars. The method is characterized in that before online cutting, crystal bars which are treated by a bar picking technology are placed in a high temperature annealing furnace for carrying out annealing; the annealing process mainly comprises the following step: a heating process, a constant temperature process, and a cooling process. The annealing process method of sapphire crystal bars is provided, unified annealing processing is carried out for crystal bars produced by different crystal growths and bar picking technology, residual stress in the crystal bars is eliminated, consistency of the quality of sapphire crystal bars is improved, and posterior wafer processing, and epitaxial yield rate and uniformity are improved.

The invention discloses a microwave preparation method of lanthanum-cerium-terbium oxide fluorescent powder, which comprises the following steps: taking oxalic acid, oxalate or ammonium bicarbonate asa precipitant; taking water and/or ethanol as a base solution, and adding a surface additive into the base solution; dropwise adding the raw material solution and a precipitant into the base solutionin twice under the action of ultrasonic waves and stirring, and aging, filtering and drying the obtained precipitate to obtain a lanthanum-cerium-terbium co-precipitate; putting the lanthanum-cerium-terbium co-precipitate into a microwave reactor for microwave heating; wherein the microwave power is 1-10 kW, the microwave heating frequency is 433-5900+/-50 MHz, a microwave output mode comprises one or a combination of continuous waves and pulse waves, the working time is 12-60 min, and performing heat preservation for 1-2 h to obtain the lanthanum-cerium-terbium oxide. The lanthanum-cerium-terbium oxide prepared by the method is consistent in particle size and uniform in morphology.