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89results about How to "Long processing cycle" patented technology

Device used for preparing Ni-SiC composite coating on inner surface of hollow workpiece

The invention discloses a device for preparing a Ni-SiC composite coating on the inner surface of a hollow workpiece. A lower water outlet pipe and an upper water outlet pipe which are parallel and are arranged in an up-and-down manner are arranged in a liquid storage tank. After electroplating liquid flowing out of the upper water outlet pipe and electroplating liquid flowing out of the lower water outlet pipe are converged, the mixed electroplating liquid flows towards a sealed electroplating table under the drive force of an electroplating liquid circulation pump, and an electromagnetic flow meter is adjusted to control the volume flow rate of the electroplating liquid flowing towards the sealed electroplating table. After composite electroplating is completed in the sealed electroplating table, the electroplating liquid flows back into the liquid storage tank through a loop. One end of an air discharging pipe is connected with an outlet of a compressed air pump, and the other end of the air discharging pipe is connected in the liquid storage tank. The device is a the sealed and continuous-circulation electroplating device developed based on a traditional non-closed immersion type electroplating device and has the beneficial effects of being reasonable in structure, reliable in operation and convenient to use and operate, and the Ni-SiC composite coating with the good quality can be obtained on the inner surface of the hollow workpiece.
Owner:NORTHWESTERN POLYTECHNICAL UNIV

Machining device for measuring equipment

Disclosed is a machining device for measuring equipment. The machining device comprises a box. A first motor is fixedly connected to one side of the bottom of an inner cavity of a rotating box. A supporting rod is rotationally connected to the middle of the bottom of the inner cavity of the rotating box. The output end of the first motor is rotationally connected with the supporting rod through adriving device. An objective table is fixedly connected to the end, away from the bottom of the inner cavity of the rotating box, of the supporting rod. The inner surface of a second bevel gear is fixedly connected with a roller screw through a flat key, a lifting device is fixedly connected to the side, close to the objective table, of a movable block, and a machining device is fixedly connectedto the side, away from the movable block, of the lifting device. The invention relates to the technical field of physical measurement, continuous machining can be performed, the machining period is shortened, the efficiency is improved, a workpiece is positioned and fixed, it is ensured that the workpiece cannot deflect in the machining process, the machining quality is ensured, the machining precision is improved, workpieces of different models can be machined through automatic adjustment according to the size of the workpieces, and the cost is lowered.
Owner:佛山杰致信息科技有限公司

Machining method for radial high-precision small square holes of rotary part

The invention discloses a machining method for radial high-precision small square holes of a rotary part. The machining range is 0.3-3.0 mm, the machining thickness is less than 1.5 mm, the root Rmax is 0.08, and the radial coplanarity degree of the opposite holes is within 0.01 mm. According to the machining method for the radial high-precision small square holes of the rotary part, on the basis of machining the small square holes through traditional electric spark forming, the small square holes are machined roughly on an electric discharge machining machine tool through an EROWA fixture and a homemade electrode stand to reserve margins for finish machining; by using the characteristics and advantages of machining the workpiece through the EROWA fixture and slow speed wire cutting, slow speed wire cutting is added into the finish machining process for the small square holes, accordingly, the purpose that the radial coplanarity degree of the opposite holes is within 0.01 mm is achieved, and the small square holes are regular in shape. Compared with a traditional machining method, the machining method for the radial high-precision small square holes of the rotary part is high in efficiency and stable in quality, and the qualified rate reaches 99% or higher.
Owner:FLIGHT AUTOMATIC CONTROL RES INST

Preservation method for fresh tea

The invention discloses a preservation method for fresh tea. The method comprises the following steps: 1) cleaning freshly picked tea; 2) carrying out vacuum freeze-drying, immediately quenching to 4 to 10 DEG C in 60 to 120 seconds and keeping for 3 to 5 minutes, wherein the water content of the tea is less than 4.5% after quenching drying, 3) placing the tea in a mixed gas of argon, carbon dioxide and nitrogen for 18 to 24 hours; 4) transferring the tea to a pure nitrogen environment and adding a biological fresh-keeping agent of which the weight ratio is 0.02% to 0.5%; 5) packaging the tea into bags, pumping vacuum and putting in the nitrogen simultaneously. With the adoption of the preservation method for the fresh tea disclosed by the invention, the problem of easy oxidization and deterioration of the tea during storage is solved, so that the preservation time of fresh leaves of the tea can be increased to 3 to 4 weeks at room temperature from 3 to 5 days, and the fresh leaves of the tea can be preserved for 10 to 30 weeks at low temperature to keep the physical and chemical properties and sensory indexes of the tea unchanged for a long term so as to effectively prolong the processing period of the fresh leaves of the tea, and the yield of famous green tea can be significantly improved.
Owner:江西犹江绿月嘉木文化发展有限公司

Computer generated hologram based on liquid crystal materials and manufacturing method thereof

The invention discloses a computer generated hologram based on liquid crystal materials and a manufacturing method thereof and belongs to the photoelectric detection field. According to the computer generated hologram based on the liquid crystal materials, a uniform transmittance substrate and the liquid crystal materials coated on the substrate are comprised; liquid crystal molecules of adjacent stripes of the liquid crystal materials are controlled through the light control orientation technology for being in different directions, and incident laser passes through the liquid crystal materials with fixed thickness and different refractive indexes and then generates fixed phase difference; the substrate and the liquid crystal materials form the computer generated hologram having a function of compensating the fixed phase difference of the incident laser; the phase difference is realized through adjusting thickness of the liquid crystal materials or replacing the liquid crystal materials to change a liquid crystal material refractive index. The invention further discloses a manufacturing method of the computer generated hologram. The computer generated hologram has high precision and low cost, the manufacturing method has a short manufacturing period and simple technology, and the computer generated hologram is suitable for detecting an optical element surface shape error through high precision laser interferometry and is suitable for detecting complex aspheric surface shapes through the laser interferometry.
Owner:BEIJING INSTITUTE OF TECHNOLOGYGY

Method for welding combustor liner and tile pads of aeroengine

The invention relates to the technical field of aeroengines, in particular to a method for welding a combustor liner and tile pads of an aeroengine. The method for welding the combustor liner and thetile pads of the aeroengine comprises floating tile blocks and studs, and the floating tile blocks and the studs use forging pieces as raw materials, and the welding technological steps of the floating tile blocks and the studs are as follows: (1) machining; (2) surface treatment; (3) clamping; (4) stud welding; (5) gripping and repairing; and (6) inspection. By adopting the method disclosed by the invention, the studs are welded to the floating tile blocks by adopting a argon arc welding way, and the verticality deviation of the studs is larger; meanwhile, the phenomenon of incomplete fusionin a central area on which the studs are connected with the floating tile blocks possibly occurs so as to affect the welding strength and low welding and positioning precision of the studs; by adopting an overall machining way, the metal cutting quantity is large, so that a material utilization ratio of the materials is low, and a machining period is long; and moreover, in a machining and cuttingprocess, high-temperature cutting heat deformation easily occurs, and a destressing heat treatment procedures are required after machining, so that the problems of the production cost and the periodsare further increased.
Owner:广汉天空动力机械有限责任公司

Gel breaking agent for preventing slurry from falling to ground and gel breaking method for waste drilling fluid

The invention relates to a gel breaking agent for preventing slurry from falling to a ground and a gel breaking method for waste drilling fluid, belonging to the field of drilling technology. The gelbreaking agent provided by the invention is composed of hydrochloric acid and polyacrylamide. The gel breaking method for waste drilling fluid comprises the steps as follows: (1) slowly adding polyacrylamide particles into the waste drilling fluid, mixing the mixture uniformly, so that the dust particles in the drilling fluid are fully adsorbed on the polyacrylamide molecular chain; (2) adding hydrochloric acid into the waste drilling fluid obtained in step (1), adjusting the pH value of 7-8, reaching the effect of gel breaking by using the property that polyacrylamide molecular chain is broken in hydrochloric acid; (3) separating the solid and solution by using a plate-and-frame filter press or a high speed centrifuge, while the centrifuged liquid can be recycled in a drilling well directly. The gel breaking method provided by the invention can be used for breaking gel completely, both the solid chemical oxygen demand (COD) and the pH value after gel breaking meet the requirement of environment protection, and all of the fluid can be recycled in drilling wells, thus, the purposes of environment protection, cost reduction and effect improvement are reached.
Owner:PETROLEUM ENG TECH RES INST CHINA PETROLEUM & CHEM CORP NORTH CHINA OIL & GAS CO +1

Optical system and theory for checking aspheric mirror through conjugate correction

The invention discloses an optical system and theory for checking an aspheric mirror through conjugate correction. Light emitted by a light-emitting point in detection equipment is imaged on a conjugate object point of a to-be-detected aspheric mirror through a correction lens; the to-be-detected aspheric mirror images the conjugate object point on a conjugate image point; and the conjugate imagepoint is used as an object point of an auto-collimation correction lens and light is returned along an auto-collimation original path of the auto-collimation correction lens. The spherical aberrationgenerated by the correction lens and the auto-collimation correction lens can correct the spherical aberration generated by the to-be-detected aspheric mirror at two conjugate points. The conjugate front and back points are related to a front region, a middle region and a back region, so that the aberration correction capability is greatly improved. The auto-collimation surface is formed on the auto-collimation correction lens and light passes through the to-be-detected aspheric mirror twice. The auto-collimation correction lens is arranged in front of the conjugate front point, so that the oblate spherical surface correction capacity is high. The correction lens is in light path connection with the auto-collimation correction lens, so that the correction capability is enhanced. The conjugate correction checking can test an aspheric mirror with a large aperture, a large relative aperture or even an ultra-large aperture and an ultra-large relative aperture.
Owner:SHANGHAI INST OF TECHNICAL PHYSICS - CHINESE ACAD OF SCI

Method for manufacturing storage crop straw-fermented feed in bags

A method for manufacturing a storage crop straw-fermented feed in bags comprises 1) raw material preparation; 2) a formula of a microbial inoculant and an operation method; 3) preparation of fermentation raw materials; 4) detection of the fermentation raw materials; 5) charging, baling and bagging: uniformly charging the concocted fermentation raw materials into a baling machine (pressure is 10 tones), carrying out at least two times of stamping for meeting the technical requirement density (500-550 kg / m<3>), bundling the obtained materials into bales by ropes, relieving pressure, pushing out the bales, artificially covering the bales with two layers of packaging bags, and conducting two times of bundling and sealing; and 6) storage and fermentation. The method is suitable for the manufacture of a plurality of green or dry crop straw fermented feeds, and the production process is simple, and the fermented materials do not need to be vacuumized after packaging, and the method is suitable for industrial manufacture and small-family processing manufacture. The method softens the thick straw and endows the straw with sour and fragrant tastes so as to stimulate appetites of livestock. In the fermentation process, the adopted packaging process prevents ultraviolet ray from influencing the fermentation, and facilitates the carrying and protection of products.
Owner:蒋华

Astronomical telescope optical system with wide field of view and wide band

InactiveCN110543006AEasy to seeShorten barrel lengthTelescopesWide bandAstronomical telescopes
The invention discloses an astronomical telescope optical system with a wide field of view and a wide band. The astronomical telescope optical system comprises a reflective Schmitt correction plate, aplane folding steering mirror, a spherical reflector and a focal plane; light rays orderly pass through the Schmitt correction plate, the plane folding steering mirror and the spherical reflector toreach the focal plane; and the focal plane is located at the back of the plane folding steering mirror. The Schmitt correction plate is located at the center of sphere of the spherical reflector, andthe Schmidt correction plate is a positive-axis high-order aspheric surface. According to the astronomical telescope optical system with the wide field of view and the wide band provided by the invention, the folding steering mirror is inserted between the reflective Schmitt correction plate and the spherical reflector, so that the focal plane is located outside the system, which is convenient forvisual observation, while the length is shortened, so that an optical structure is more compact; and more importantly, the designed reflective Schmidt correction plate belongs to the positive-axis high-order aspheric surface, and in the design phase, the asphericity is controlled within an easy processing detection range, so that the processing cost of a Schmidt system is lower.
Owner:NANJING ZHONGKE ASTROMOMICAL INSTR
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