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365 results about "Mechanical Processes" patented technology

The mechanical process is the positing of what is contained in the Notion of mechanism, and therefore, in the first instance, of a contradiction. 1. It follows from the Notion just indicated that the interaction of objects takes the form of the positing of the identical relation of the objects.

Flight simulation turntable control system and method using intelligent pid controller

The invention discloses an intelligent PID (Proportion Integration Differentiation) controller, which comprises a first controller, a second controller and a third controller. The invention further discloses a flight simulation rotating table control system applying the intelligent PID controller. The flight simulation rotating table control system comprises an intelligent PID controller and a flight simulation rotating table system, wherein the output end of the intelligent PID controller is connected with the input end of the flight simulation rotating table system. The control system can be used for setting parameters of the PID controller through online adjustment, so that the adverse effects of nonlinear and uncertain interference factors such as mechanical friction, mechanical resonance, sensor accuracy, mechanical process level and the like existing in a rotating table servo system on tracking control are eliminated, the servo tracking accuracy is enhanced, the confidence levelof a flight control semi-physical simulation system is raised, and the research accuracies or performances of a flying vehicle control system and a guidance system are enhanced. The invention furtherdiscloses a flight simulation rotating table control method.
Owner:NANJING UNIV OF AERONAUTICS & ASTRONAUTICS

Dental implant and 3D printing preparation method thereof

The invention provides a dental implant including a dental implant body and an abutment part, wherein the abutment part is arranged on the dental implant body, and the abutment part is formed integrally with the dental implant body. The invention also provides a 3D printing preparation method of the dental implant. The 3D printing preparation method disclosed by the invention can overcome shortages of an individuated dental implant manufactured by a conventional mechanical processing technology, effectively solves the processing technology problems of a complex dental implant structure, at the same time, makes the design form and type of the dental implant more open, improves the processing efficiency, greatly reduces the processing cost, and reduces the post-treatment process. The requirement on the equipment accuracy is not as high as mechanical-processed equipment, the roughness degree of an outer surface is controllable, and surface sandblasting treatment procedures are reduced. An integrally-formed structure of the dental implant provided by the invention can avoid the micro leakage problem of a traditional two-section connection. The dental implant provided by the invention is more beneficial for immediate implantation, reduces bone loss, reduces the operation process, and allows a operation to become a minimally invasive operation or even a noninvasive operation.
Owner:广东健齿生物科技有限公司

Air cold plate sealing forming technology of aluminum alloy

A aluminum alloy air-cooled freezing-plate sealing shaping process includes the following steps: 1. processing the appearance of freezing-plate, dissipating heat fins and cover plate parts according to structure design, the structure design of freezing-plate is flush type cavity structure, the two ends of freezing-plate shell is equipped with 2-3 soldering fabrication holes with diameter of 2-3mm; 2. welding the dissipating heat fins and freezing-plate shell, cover plate through the soldering method in nitrogen protection furnace; 3. milling out printed circuit board slots on the freezing-plate shell; welding the cover plate and shell vertical soldering seam through stirring friction welding; 5. mechanical processing the appearance and two end ventilators of freezing-plate according to the drawings requirements, processing the soldering fabrication holes into two end ventilators. The aluminum alloy freezing-plate using the art method of combination of soldering and stirring friction welding in the invention increases the resistant finely processed capacity of brazing seam surface, ensures the hermeticity requirement after finely process aluminum alloy freezing-plate and increases the welding yield rate of electronic structure cabinet.
Owner:CHINA ELECTRONICS TECH GRP CORP NO 14 RES INST

Method for preparing renewable nano-celluloses

The invention relates to a method for preparing renewable nano-celluloses. The method includes pre-treating paper pulp by the aid of mechanical processes and then carrying out catalytic oxidation treatment on the paper pulp by the aid of TEMPO/NaClO/NaBr systems; ultrasonically smashing the paper pulp and carrying out high-pressure homogenization treatment on the paper pulp to obtain nano-cellulose suspension; treating the nano-cellulose suspension by the aid of semi-baking/semi-natural static drying processes to obtain the renewable nano-celluloses. The method has the advantages that the renewable nano-celluloses can be synthesized by the aid of the method with combinations of the mechanical processes and chemical processes, accordingly, the production cost of the nano-celluloses can be greatly reduced, the production efficiency can be improved, the yield can reach 95% at least, the surfaces of the nano-celluloses can be modified, and the renewable nano-celluloses are excellent in mechanical property and heat resistance; the renewable nano-celluloses are made of the paper pulp, TEMPO and the like, water is used as a solvent, main raw materials can be recycled, toxic reagents and medicines are omitted in integral production procedures, accordingly, environments can be protected, and energy can be saved; the renewable nano-celluloses can be produced in an environment-friendly manner, the method is easy and convenient to implement and free of environmental pollution and has a broad application prospect, the renewable nano-celluloses are high in preparation yield and low in cost, and the like.
Owner:TONGJI UNIV
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