92results about How to "Small size limit" patented technology

The invention provides a binding agent for powder injection moulding, a preparation method of the binding agent and an application method of the binding agent. The binding agent is mainly prepared from the following components in percentage by mass: 65 to 75 percent of polyformaldehyde, 4 to 9 percent of dioctyl phthalate, 6 to 13 percent of polyethylene, 1 to 3 percent of acrylate copolymer, 3 to 8 percent of polyacrylamide, 1.5 to 4 percent of paraffin, 2 to 6 percent of microcrystalline wax and 0.5 to 2 percent of ethylene vinyl acetate copolymer. In the binding agent provided by the invention, multiple types of components are combined through scientific compatibility, so that the compatibility between metal powder or ceramic powder and the binding agent can be obviously improved, and meanwhile, the binding agent can be quickly removed in a degreasing process without causing the defects of bubbling and cracking of a green body, so as to guarantee the quality of the green body.

The invention provides a hyper-spectral image classification method based on a Gaussian process classifier collaborative training algorithm-. The method belongs to the technical field of image processing, and mainly solves the problem of low classification precision when the number of marked samples of hyper-spectral data is small in the prior art. The method comprises the following implementation processes of: firstly, randomly dividing feature vectors of samples into two sub feature vectors which are used as two visual angles of the samples; performing Gaussian process classifier collaborative training by using the two visual angles of partial non-marked samples and existing marked samples to obtain two final Gaussian process classifiers; and marking the two visual angles of all the non-marked samples by using the two final Gaussian process classifiers respectively, wherein the class mark with higher probability is used as the classification result of the non-marked samples. The method applied to hyper-spectral image classification can be used for remarkably improving the classification accuracy under the condition of small marked sample number.

The present invention relates to a pulse detonation rotor shaft engine. In the technical proposal, the pulse detonation rotor shaft engine mainly consists of a pulse detonation engine, a rotor and an output shaft; propulsive gas with the high temperature and high pressure expansion of pulse which is ejected when the pulse detonation engine works is used as a power source to push the rotor to rotate; the rotor drives the output shaft to rotate; a pulse detonation rotor shaft engine uses the output shaft to output most energy produced by the pulse detonation engine by outputting torsion continuously; the output shaft drives various kinds of loads to work. The pulse detonation rotor shaft engine has the beneficial effects as follows: firstly, the pulse detonation rotor shaft engine can be used as a shaft engine to be widely applied in various kinds of dynamic systems, such as ship, submarine, tank, tractor, automobile, train, and the like and has wide purposes; secondly, the pulse detonation rotor shaft engine overcomes the disadvantage of the large noise of the prior pulse detonation engine; thirdly, compared with a piston type engine, the pulse detonation rotor shaft engine has the obvious advantages of simple structure, low cost, high reliability, long service life, light weight, less fraction resistance loss, etc.

The invention provides a wafer level package structure and a formation method thereof. The method comprises the following steps: providing a substrate; forming a cavity in the substrate; forming a redistribution line in the substrate and on part surface of the cavity; providing a chip to be packaged, wherein the chip has a device surface and a basal surface opposite to the device surface; formingan Under Bump Metal on a soldering pad layer surface of the device surface and forming a bump on a surface of the Under Bump Metal; connecting the chip to be packaged with the substrate such that thechip to be packaged faces the cavity and the bump is electrically connected with the redistribution line. The wafer level package structure in the invention has the advantages of a simple structure, high packaging quality, and high compatibility in subsequent combination with PCB plate process. The wafer level package structure formation method in the invention has the advantages of simple process sequence and low cost.

The machine for crushing waste tyre and other rubber product initially consists of one pedestal, one motor, one speed reducer and one crushing mechanism. It features the cutting mechanism comprising the fixed blade in the feeding port of the crushing chamber and the spiral feeding blades in the work rotor. The machine has both cutting and crushing functions, and is suitable for direct crushing of various kinds of waste tyre, especially waste radial tyre with steel wire.

Disclosed is a vibration sound-producing apparatus. A sound output aperture of the vibration sound-producing apparatus is provided at a lateral surface. A diaphragm corresponds to the position of the sound output aperture. A flat sound coil is perpendicular to the diaphragm. A magnet is parallel to the sound coil. The vibrating direction of the sound coil avoids a thickness direction. The vibrating direction of the magnet and a mass block also avoids the thickness direction. The mass block is fixedly joined to a housing via a flexible piece. This facilitates reduced product thickness, increased product performance, and a simplified product production process. Therefore, the vibration sound-producing apparatus of the present invention has the advantages of a great thickness-reduced design, great performance, and simple assembly.

The invention provides an ultrasonic solidification-friction stir composite added material manufacturing device and an application method. The ultrasonic solidification-friction stir composite added material manufacturing device comprises a shell, a machining mechanism, a metal foil conveying mechanism, a driving mechanism, a cutting mechanism, a movable steering mechanism, an extrusion mechanism,an adjusting mechanism and locking universal wheels; the machining mechanism is fixedly connected into the shell; and the machining mechanism comprises a numerical control machining center, a controlpanel, a machining cavity, a substrate, a first electric slide rod, a first electric slide sleeve, a mounting plate, a connecting plate, a machining head, a transducer, an amplitude change rod, an insulation sleeve, a first cylinder, a first piston rod and a friction stir head. The ultrasonic solidification-friction stir composite added material manufacturing device can prepare high-performance metal samples; the mechanical performances of the samples are higher than forgings by 20-50%; and the device is low in size limiting, can machine large-size complex-structured parts, can from more thantwo metal materials according to working conditions and typical performance requirements of parts, and realizes preparation of heterogeneous/gradient function materials.

The invention discloses a thermoelectric device performance testing device which comprises a heating platform, a refrigerating platform, a closed testing cavity and a vacuum pump. The method is designed based on a one-dimensional steady-state heat flow method. A to-be-tested thermoelectric device is arranged in a vacuum test cavity. An infrared radiation heating mode (the temperature of the hot end ranges from 20 DEG C to 600 DEG C) is adopted by the hot end; the size limitation of the thermoelectric device to be tested is reduced due to the liquid heat measurement mode (the temperature rangeof the cold end is-50 DEG C to 200 DEG C) of the cold end, and the output power and the conversion efficiency of the thermoelectric device with the wide size range (10mm to 100mm) can be accurately tested; a test can be carried out at the temperature of 0-650 DEG C under a variable temperature difference condition; moreover, the vacuum pump is used for pumping the test cavity into a vacuum cavityfor testing, so that the influence caused by heat convection is avoided. The method has great advantages in accurate testing of the performance of the non-standard thermoelectric device, repeatabilityand stability testing required by commercialization of the thermoelectric device can be achieved, and the method is high in applicability.

The invention discloses a magnetron sputtering device for coating a film on the inner wall of a pipe with a large length-diameter ratio. The magnetron sputtering device comprises a heating system for heating the pipe with the large length-diameter ratio, a vacuum end adapter and a vacuumizing system connected with one end of the pipe with the large length-diameter ratio, a power supply end adapter and a high-power pulse power supply connected with the other end of the pipe with the large-length-diameter-ratio, and a hollow pipe penetrating through the vacuum end adapter, the pipe with the large-length-diameter ratio and the power supply end adapter and located on the central axis of the vacuum end adapter, the large-length-diameter-ratio pipe and the power supply end adapter, a single or multiple annular target systems and a cooling water system, wherein fine holes are evenly distributed in the hollow pipe; the annular target systems are arranged on the hollow pipe in a sleeving manner and can move along the hollow pipe; and the cooling water system is connected with the annular target systems. An annular target material moves back and forth in a pipe fitting along a center shaft to realize uniform film coating of the inner walls of the pipe fittings with different lengths, the target material can be selected from a metal material and a non-metal material, and multiple target materials can be coated with multiple layers of films through cooperative coating of several target systems, and the problem that an existing pipe fitting inner wall coating technology can only achieve single-component film coating is solved.

The method for producing cold-extruded aluminum tube includes: 1. preparing at least a tube material of aluminium; 2. reducing calibre of one end of the tube material and changing it to small; 3. coating said tube material with lubricating agent; 4. cold-extruding treatment; preparing at least one eye mould and at least noe core shaft, inserting the core shaft into said tube material, pushing one end of said tube material which is undergone the process of head-reducing treatment of drive said tube material and make it pass through the mould eye of said eye mould to make said tube material be formed into the required aluminum tube. It can raise working quality and working speed, and can reduce consumption of aluminium material, and can reduce cost.

A camera actuator according to an embodiment can comprise: a housing; a prism unit disposed inside the housing; a driving part for tilting the prism unit; and a rotation unit for tilting the prism unit about a first axis or a second axis. The rotation unit can comprise: a rotation housing; a rotation guide disposed inside the rotation housing; and a guide pin member coupled to the rotation guide.

The invention relates to a pressure sensor based on asymmetric period surface plasmon lattice resonance. The sensor comprises a lower-layer PDMS substrate and a nano-structure unit array located abovethe upper-layer PDMS substrate, and each nano-structure unit is formed by closely stacking a top metal ridge, a middle dielectric layer and a bottom metal ridge which are sequentially arranged from top to bottom. In a plane parallel to the lower PDMS substrate, the array period parameter Lx of the nano structure unit in the x direction and the array period parameter Ly of the nano structure unitin the y direction are different from each other. And the external pressure acts on the lower PDMS substrate, so that the change of the surface plasmon resonance wavelength is caused, and a pressure signal is converted into an optical signal for detection. The optical device structure provided by the invention has a very high quality factor, can realize accurate detection of micro deformation pressure, has less limitation on the structure size, and has a wider sensing application range.

The invention provides a sealing device of a recoil roller chip removal device. The sealing device of the recoil roller chip removal device comprises a chip removal device body 1, a cover plate 2, a roller end cover 3, a rubber pad 4, a roller 5, packing 6 and self-tapping screws 7. One end of the roller 5 is provided with a vertical part which is perpendicular to the axial direction of the roller. A protruding part which extends in the axial direction of the roller is arranged in the middle of the vertical part. An annular protruding part is formed on the end face of the roller. An annular groove is formed between the annular protruding part and the roller. A circular ring is welded to the inner side face of the roller end cover 3. A labyrinth sealing structure is formed after the roller 5 and the roller end cover 3 are installed, so that primary sealing is achieved. A plurality of holes are formed in the vertical plane of the vertical part, one self-tapping screw 7 is arranged in each hole, the rubber pad 4 is installed on the inner side of the groove, the packing 6 is pressed on the rubber pad 4, and two connectors are fixed to two adjacent self-tapping screws correspondingly. The screws are used for fixing the packing, the situation that a gap is nonuniform due to the rotation of the packing is avoided, and thus filtration is more reliable.

The invention discloses a preparation method of high-strength and high-plasticity 304 austenitic stainless steel with low martensite content, and belongs to the technical field of metal material strengthening. According to the method, small-angle circulating and reciprocating torsional deformation treatment is conducted on a coarse-grain 304 stainless steel bar or pipe, so that dislocation and nano twin crystal deformation microstructures distributed in a gradient mode are introduced into an original coarse-grain structure of 304 stainless steel, and meanwhile, the martensite structure contentof the surface layer of the material is less than 7%; the small-angle cyclic torsional deformation treatment means that one end of the bar or the pipe is fixed, and a force is applied to enable the other end of the bar or the pipe to rotate around the center axis of the bar or the pipe in a reciprocating mode, so one-time reciprocating rotation is one cyclic torsional cycle. Compared with a uniform coarse grain structure with the same components, the material treated by the circulating torsion process is improved by more than 1.5 times in the yield strength, and the metal material has uniformplasticity equivalent to that of coarse grains.

The invention belongs to the field of mechanical transmission and relates to a novel spiral chip remover driving device. The novel spiral chip remover driving device comprises a driving motor (1), a first driving chain wheel (2), a second driving chain wheel (3), a driving shaft (4), a bearing support (6), a first screw rod (11), a pin shaft (12), a double-row roller chain (14), a tensioning wheel (15), a tensioning bearing (16), a tensioning shaft (17), a double-row-tooth driven chain wheel (18), a driven shaft (19) and a second screw rod (20). According to the technical scheme, the novel spiral chip remover driving device has the beneficial effects that a driving method of meshing double rows of chains with the chain wheels is adopted, the conventional thought that one driving motor can only drive one screw rod to operate in the prior art is changed, the working efficiency is improved, the problem that cutting fluid enters the motor and causes damage of the motor due to wet can be effectively solved, the service life of the motor is prolonged, the cost is reduced. The novel spiral chip remover driving device, compared with a device capable of achieving same function, occupies a smaller area and consumes less energy.

The invention relates to an outdoor solar reel, which solves the problem that the size of a flexible solar cell panel is limited and the surface is easy to be damaged due to the existing solar reel peripheral housing. The device has a cylinder core, the cylindrical surface of the cylinder core is wound with a flexible solar cell panel, one end of the flexible solar cell panel is fixed on the outerwall of the cylinder core and is connected with a battery in the cylinder core, The other end is provided with a fixing strip, wherein elastic ropes are pierced through the fixing strip, the elasticropes are pierced out from both ends of the fixing strip and form a collar, the two ends of the cylinder core are provided with fixing parts, the fixing parts are provided with an annular groove, andwhen the flexible solar cell panel is in a rewinding state, the elastic ropes installed in the collar at both ends of the fixing strip are sleeved in the annular groove respectively. The fixing methodof the invention is simple and reliable, and the elastic rope can be pulled out in the middle of the fixing strip and used as a hanging rope suspension; Winding is open, thereby reducing the possibility of scratches; The length of flexible solar panels is adjustable to a certain extent.

The invention discloses a method capable of obtaining flexible graphene current collectors in batches. The method comprises the following steps: (1) mixing concentrated sulfuric acid and crystalline flake graphite so as to prepare a mixed solution; (2) adding hydrogen peroxide with a concentration of 30% into the mixed solution, carrying out stirring, then carrying out standing at a normal temperature, carrying out washing with water, and carrying out drying so as to obtain graphene powder; and (3) rolling the graphene powder into paper by using a rolling technology, then carrying out annealing, and carrying out rolling again so as to obtain flexible graphene paper. According to the preparation method for the flexible graphene current collectors provided by the invention, the flexible graphene current collectors with high conductivity, light weight and hydrophilicity can be obtained in batches by using rolling equipment through simple and low-cost puffing stripping and rolling technologies and preparation from powder to paper.

The invention discloses a cyclic torsion machining process for improving the mechanical property of a metal material, and belongs to the technical field of metal material strengthening. Specifically,the process comprises the steps: applying small-angle circulating torsional deformation to a metal bar, a pipe or a plate sample, and generating shear shaping strain in gradient distribution from thesurface to the interior of a metal material, so deformation microstructures such as dislocation in gradient distribution and nano twin crystals are introduced, and an original coarse grain structure is reserved, wherein the torsion angle amplitude is between 2 degrees and 30 degrees, and the number of torsion cycles is between 2 and 200. Compared with a uniform coarse grain structure with the samecomponents, the metal material treated by the circulating torsion process is improved by more than 1.5 times in yield strength, and the metal material has uniform plasticity equivalent to that of coarse grains. By utilizing the method, the microstructure with gradient distribution is obtained in the original coarse grain and has high strength and good plasticity matching.