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127results about How to "Ensure high precision requirements" patented technology
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Digital loudspeaker drive method and device based on quaternary code dynamic mismatch reshaping
ActiveCN103152673AImprove efficiencyImprove reliabilityLoudspeaker signals distributionMOSFETSound sources
The invention relates to a digital loudspeaker drive method and a device based on quaternary code dynamic mismatch reshaping. The method comprises the steps of (1) conducting input format conversion, (2) conducting multi-bit sigma to delta modulation, (3) conducting thermometer code conversion, (4) conducting dynamic mismatch reshaping processing, (5) conducting channel data combination and mapping coding, (6) controlling metal-oxide-semiconductor field effect transistor (MOSFET) pipe of a full-bridge power amplifier network to conduct opening and closing status switching, and driving a digitalized loudspeaker load to produce sound. The device comprises a sound source (1), a digital format converter (2), a multi-bit sigma to delta modulator (3), a thermometer coder (4), a dynamic mismatch reshaper (5), a channel data combiner (6), a mapping coder (7), a multi-channel digital amplifier (8) and the digitalized loudspeaker load (9). The units are sequentially connected in order. According to the digital loudspeaker drive method and the device based on quaternary code dynamic mismatch reshaping, use efficiency of an amplifier pipe and the load is improved, development periods and hardware implementation cost are saved, and good immunity is provided for frequency response deviation of digital channels.
Owner:INST OF ACOUSTICS CHINESE ACAD OF SCI
Electronic sphygmomanometer
ActiveCN1923134ALow costEnsure high precision requirementsEvaluation of blood vesselsAngiographyExhaust valveMeasurement device
The invention relates to an electric blood pressure meter, which comprises automatic aerator, pressure device, measurer, controller and display. Wherein, it uses aerator to aerate the pressure device, uses sensor to sense the pressure of air bubble to obtain the pressure valve, and display the valve on analogue mercury ruler; the ruler is divided into several sections, based on pressure values to display the section at said pressure value, and indicate relative ruler scale. Therefore, the electric blood pressure meter can avoid display whole mercury ruler, but display segmented, to reduce the cost and avoid hand-operated aerating, to simplify the operation, and uses the automatic discharge valve to uniformly discharge air to improve the accuracy.
Owner:潘卫江 +1
Master-slave type plastic spraying robot
InactiveCN102059691AEnsure high precision requirementsIncrease stiffnessProgramme-controlled manipulatorLiquid surface applicatorsMicrocontrollerRectangular coordinates
The invention discloses a master-slave type plastic spraying robot. The master-slave type plastic spraying robot consists of an X direction traversing rail component, a direct current motor, a Z direction lifting rail component, a cross arm, a stepping motor, a wrist part and a clamping part. The master-slave type follow-up plastic spraying robot consists of a master hand and a slave hand, wherein the master hand acquires signals of an operator and sends the signals to the slave hand, and the slave hand executes corresponding actions according to a master hand instruction. The mechanical part of a slave machine is provided with a rectangular coordinate type mechanical hand, a robot body part transmits movement by using screws and nuts, and the wrist part is driven by the stepping motor, is accurately positioned, can be arbitrarily raised and put down within a range of 180 DEG and can spray at multiple angles. The core of a control part realizes dual-machine communication by using a singlechip, and angle sensors are arranged in the robot body and the wrist part to feed the movement information of the slave machine back to a master machine.
Owner:王雪
Hinged mounting base on 100% modern city tramcar
ActiveCN104015749AReduce weightEnsure high precision requirementsRailway couplingsArchitectural engineeringAlloy
The invention discloses a hinged mounting base on a 100% modern city tramcar. The hinged mounting base comprises an upper panel, a lower panel, a connecting rib plate, a rear block plate and a base, wherein the connecting rib plate is respectively connected to the upper panel, the lower panel and the rear block plate in a welding manner; the upper panel and the lower panel are welded on the rear block plate; the rear block plate is welded on the base; a hole for riveting is formed in the base. The hinged mounting base can be applied to installation of an upper hinge device of a 100% low-floor tramcar. The connection mode of the hinged mounting base and a car body is a riveting manner, so that not only is the hinged mounting base not limited by a roof end part material, but also the hinged mounting base can be conveniently repaired and replaced after being damaged. The hinged mounting base is welded by a high-strength carbon steel material, so that the hinged mounting base has enough strength and rigidity, and is especially applicable to local reinforcement on the hinged part on an aluminum alloy car body, the strength index of the overall car body is met, the weight of the car body is reduced, and the hinged mounting base has significant advantages of simple structure, reliable performance, good repairability and the like, and is convenient to assemble.
Owner:CHENGDU XINZHU ROAD & BRIDGE MASCH CO LTD
Automobile light knob switch elastic sheet contact automatic assembling method
Owner:JIANGSU ZENTO ELECTRICS
A method for modeling and forecasting that motion trajectory of space cluster target
ActiveCN109242886AHigh precisionComprehensive portrayal of sports characteristicsImage analysisAviationMathematical model
A method for characterizing and forecasting that trajectory of space group target features is disclosed, relating to the field of aerospace. That the mathematical model of the trajectory of group target is used to characterize the trajectory of space group target, and the tracking and forecasting accuracy of such target is improved. This method decomposes the cluster target motion into two parts:the whole cluster motion event and the salient target motion event in the cluster. For the whole cluster, the movement rule is characterized and predicted from the movement trend of cluster center, the evolution of cluster spatial structure and the relative movement of subgroups. For the salient target, based on the target resolution, the hierarchical modeling idea, the application of dynamics, kinematics and compensation modeling techniques are combined to achieve the characterization and prediction of its motion characteristics. The method described in the patent adopts the idea of combiningthe whole tracking with the local resolution to realize the modeling and prediction of the motion trajectory of the space cluster targets, and can directly serve the design of the tracking methods inthe fields of the space debris environment monitoring, the on-orbit service, the anti-missile early warning, the situation sensing, and the like, so as to improve the tracking performance of the cluster targets.
Owner:NO 63921 UNIT OF PLA
Guidance method for endoatmospheric powered phase of RLV (reusable launch vehicle)
The invention provides a guidance method for the endoatmospheric powered phase of a RLV (reusable launch vehicle), which includes the following steps: (S1) according to flight altitude, the ascent phase of the flight track of the RLV is divided into a previous flight phase and a later flight phase; (S2) open-loop guidance is adopted at the previous flight phase, and closed-loop guidance is adopted at the later flight phase; (S3) in the process of closed-loop guidance at the later flight phase, a compensation scheme for altitude and / or trajectory inclination angle is adopted. Compared with the prior art, the guidance method has the following advantages: (1) according to flight altitude, the guidance method divides the ascent phase into the two phases, which respectively adopt open-loop guidance and closed-loop guidance, consequently, not only is the problem that the robustness of closed-loop guidance is decreased by strong interference factors within the dense atmosphere effectively prevented, but also the high precision requirement of the guidance is ensured, and thereby both the robustness of a guidance algorithm and the high precision are taken into consideration; (2) the requirement of the scheme on the memory space and on-line computation load of an onboard computer of launch vehicle is low, guidance commands can be obtained only by interpolation and simple calculation, the reliability is high, and engineering implementability is ensured.
Owner:CHINA ACAD OF LAUNCH VEHICLE TECH
Flip box automatic production line and production method thereof
ActiveCN103753865AIncrease productivityReduce production efficiencyBoxes/cartons making machineryProduction linePaper sheet
The invention discloses a flip box automatic production line and a production method thereof. The flip box automatic production line comprises, arranged according to process sequence, a bottom box producing module, a cover producing module and an upper cover and bottom box combining module. The production method includes 1, automatically forming a bottom box and packaging with paper; 2, automatically forming an upper cover and packaging with paper; 3, combining the bottom box and the upper cover to produce a finished product. The flip box automatic production line and the production method thereof have the advantages that producing efficiency is improved greatly, and labor investment is reduced.
Owner:星光印刷(苏州)有限公司
Rotating type varying stiffness flexible joint
The invention relates to a rotating type varying stiffness flexible joint. The joint is characterized by comprising a driving disc, an end cover, a torsional spring, a special-shaped gear set, a standard gear set, a first shaft, a second shaft, an output shaft, a shaft end fixed frame, a worm, a worm gear, a direct-current speed reduction motor, a coupler, a connecting plate, a worm fixing block, a clamping spring, a motor mounting base, fixing blocks and a bearing pedestal; the driving disc is fixed to the end cover, the end of the driving disc is connected with an outer motor directly through a speed reducer to serve as input of the flexible joint, the bearing pedestal and the shaft end fixing frame are arranged in the driving disc, the bearing pedestal and the driving disc are of an integral structure, the driving disc and the end cover are connected through a bolt to serve as a shell of the joint, the two ends of the shaft end fixing frame are fixed to the driving disc through the fixing blocks, the output shaft is fixedly arranged between the end cover and the shaft end foxing frame through a deep groove ball bearing, and the output shaft is connected with an outer component; the first shaft and the second shaft are fixed to the driving disc and the end cover through the deep groove ball bearing and the bearing pedestal.
Owner:HEBEI UNIV OF TECH
Mold for integrally molding J-shaped reinforced composite material wall plate
The invention belongs to a resin-based composite material molding technology, and relates to a mold for integrally molding a J-shaped reinforced composite material wall plate. The mold provided by the invention comprises an appearance mold 1, a positioning block 2, an upper flange forming mold 3, a limiting mold 4, a lower flange forming mold 5, and an auxiliary mold 6. According to the invention, the appearance mold 1 is adopted as a basis, and the positioning block 2, the upper flange forming mold 3 and the limiting mold 4 are positioned sequentially. Through the controlling over position precision of the assembled upper flange forming mold 3 and the assembled limiting mold 4, precision of the upper flange appearance surface of the J-shaped reinforcing rib and axis position precision of the reinforcing rib are ensured. Therefore, mold manufacturing cost is reduced, and manufacturing cycle is shortened.
Owner:AVIC COMPOSITES
Twelve-point support based vertical launching platform attitude leveling control method
InactiveCN106094880ASignificant coupling effectGuaranteed synchronization stabilityControl using feedbackMathematical modelSimulation
The invention discloses a twelve-point support based vertical launching platform attitude leveling control method. The method comprises the steps of firstly building a mathematical model of a twelve-point supported vertical launching platform attitude leveling system, adjusting the position through a position error control based attitude leveling method, adjusting the angle through an angle error control based attitude leveling method, and finally carrying out joint simulation on the vertical launching platform attitude leveling system. According to the invention, a control algorithm applicable to twelve-point leveling is explored on the basis of four-point leveling. The algorithm adopts an idea of block leveling and converts complex multi-point leveling into three-point or four-point leveling which is easy to implement, ideal simulation effects in both leveling precision and leveling time are acquired, and excellent servo control performance of a launching platform is ensured.
Owner:NANJING UNIV OF SCI & TECH
Attitude Compensation Method for Agile Satellite Imaging with Pushbroom Velocity Mismatch in Any Direction
ActiveCN102267575AImprove mission performanceIncrease diversitySpacecraft guiding apparatusEarth's rotationTime delays
The invention relates to a posture compensation method for dealing with mismatching of a push-scanning speed for imaging along random direction of a quick satellite. For breaking through the limitation (only taking the deflecting effect caused by earth rotation into consideration) of the posture compensation method under a traditional imaging mode (fixed direction from satellite to earth), the reason why the deflecting effect is generated under the imaging mode with constantly changing posture-to-earth direction (namely, posture-to-earth direction constantly changes under the condition of mismatching between a satellite spot speed and a camera push-scanning speed) when the satellite is used for push-scanning along random direction is analyzed and the imaging deflecting effect is analyzed from three aspects of orbital motion, earth rotation and camera push-scanning speed, thereby acquiring a deflecting angle calculation formula under such a mode according to the track posture parameters and the basic definition of a deflecting angle. Based on the deflecting angle calculation formula and a basic principle of TDICCD (Time Delay Integral Charge-coupled Device) imaging as well as a yawcontrol principle, the posture compensation method, which can meet the imaging requirement for push-scanning along random direction of the quick satellite, is provided.
Owner:AEROSPACE DONGFANGHONG SATELLITE
Infrastructure structure deformation monitoring method based on Beidou high-precision positioning
ActiveCN111795639ATo achieve the purpose of real-time monitoringReal-time deformation monitoringElectrical/magnetic solid deformation measurementSatellite radio beaconingOriginal dataSimulation
The invention provides an infrastructure structure deformation monitoring method based on Beidou high-precision positioning. The method comprises four steps of Beidou satellite signal data acquisition, wireless network communication and data analysis, Beidou real-time processing and Beidou post-processing. Beidou real-time processing adopts Kalman filtering to update and estimate parameters in real time to obtain a real-time calculation result, and Beidou post-processing adopts double Kalman filtering to process the real-time calculation result and historical result data. A Beidou high-precision positioning equipment terminal is used, Beidou original data can be collected in real time, and then calculation is performed through a real-time and static post-processing algorithm and a processing flow so that real-time and post-millimeter-level deformation monitoring of infrastructure structures (such as high-rise buildings, dams, mountains, bridges and electric towers) can be realized.
Owner:HUNAN LIANZHI BRIDGE & TUNNEL TECH
Manufacturing device and manufacturing method for supportless polarized separation grid at microwave band
InactiveCN103219594AReduce manufacturing costReduce manufacturing difficultyAntennasMicrowave bandManufacturing engineering
The invention relates to a manufacturing device and a manufacturing method for a supportless polarized separation grid at a microwave band. The manufacturing device comprises a support (1), a grid framework (3), a die (2) and a tensioning weight (5). On the basis of the application of the device disclosed by the invention, the invention further provides a manufacturing method for the supportless polarized separation grid at the microwave band. The method and device for manufacturing the polarized separation grid have the characteristics of low production cost, simple system components and production process, high precision of produced products, supportless manufacture, high reliability, convenience in maintenance and better production flexibility in production device; and the method and the device meet demands of the medium-small batch production and scientific application.
Owner:NAT SPACE SCI CENT CAS
Method for manufacturing buoyancy tanks of semi-submerged ship
InactiveCN102030075AEnsure high precision requirementsVessel partsMarine engineeringMechanical engineering
Owner:CSSC HUANGPU WENCHONG SHIPBUILDING COMPANY
Automatic assembly line for automobile lamplight knob switch elastic piece contact points and work method thereof
The invention discloses an automatic assembly line for automobile lamplight knob switch elastic piece contact points and a work method thereof. The automatic assembly line for the automobile lamplight knob switch elastic piece contact points comprises an automatic feeding station, a silver point containing station on one side of a guide flow channel, a silver point riveting station, a copper point containing station, a copper point riveting station and an automatic discharging station, wherein the automatic feeding station, the silver point containing station, the silver point riveting station, the copper point containing station, the copper point riveting station and the automatic discharging station are arranged according to the process order. The automatic assembly line for the automobile lamplight knob switch elastic piece contact points has the advantages of being high in efficiency, low in cost, high in product quality and the like.
Owner:JIANGSU ZENTO ELECTRICS
Gas filling bottle welding rotating device and working method thereof
ActiveCN104084668AIncrease productivityFast manufacturingWelding/cutting auxillary devicesElectrode supporting devicesProduct gasEngineering
The invention discloses a gas filling bottle welding rotating device and a working method thereof. The device comprises a machine frame, a driving rotating body, a driven rotating body, clamping sleeves and a motor and the like, wherein the driving rotating body and the driven rotating body can move relatively, and the clamping sleeves are installed on the driving rotating body and the driven rotating body. The working method of the gas filling bottle welding rotating device comprises the steps of feeding, clamping, rotation and blanking and the like. The gas filling bottle welding rotating device can greatly improve gas filling bottle production efficiency and reduce manpower resource investment.
Owner:无锡市迪索数控焊接设备有限公司
Method for detecting orifice of conical bore
InactiveCN106643423AEasy to operateLow costMechanical diameter measurementsVernier scaleCircular cone
The invention discloses a method for detecting the orifice of a conical bore, and the method comprises the steps: the size analysis of a to-be-detected part, the machining of a measuring tool, the setting of an upper deviation line, the setting of a lower deviation line, and the measurement. According to the invention, a conical body with the same taper as a to-be-detected conical bore is provided with the upper and lower deviation lines at an interval, and the conical body is put in the conical bore of the to-be-detected part. When an end face of the detected part is located within the two scribed lines on the conical body, the detected part is determined to be qualified; or else, the detected part is detected to be unqualified. Compared with a conventional measurement method employing a vernier caliper, the method is convenient for operation, is low in cost, is high in measurement precision, can greatly reduce the manpower and time consumption, and also can meet the high-precision requirements of measurement.
Owner:贵州凯星液力传动机械有限公司
Attitude Compensation Method for Agile Satellite Imaging Side Swing Pushbroom Velocity Mismatch
ActiveCN102267574AImprove mission performanceEnsure high precision requirementsSpacecraft guiding apparatusEarth's rotationDrift angle
The invention discloses a posture compensation method in case of mismatched side-swing push-broom velocity in imaging of an agile satellite. For the limitation (only the drift action caused by auto-rotation of the earth is considered) of the posture compensation method in the traditional imaging mode (the pointing direction of the satellite to the ground is fixed), the drift angle calculation formula is obtained under the mode according to the track posture parameter by analyzing the reason for the generation of the drift angle under the imaging mode (namely the condition that the substellar point velocity is mismatched with the push-broom velocity of a camera, and the pointing direction of the posture at the moment to the earth changes continuously) that the pointing direction of the side-swing push-broom posture of the satellite to the earth changes continuously, considering the drift action of the imaging from the three aspects such as orbital motion, auto-rotation of the earth andthe push-broom velocity of a camera and combining the basic definition of the drift angle. On the basis, by combination of the basic principle of TDICCD (time delay integration charged coupling device) imaging and the yawing control principle, the satellite posture compensation method is given, so that the imaging requirement for side-swing push and broom of the agile satellite can be met.
Owner:AEROSPACE DONGFANGHONG SATELLITE
Gas filling bottle welding swinging frame and working method thereof
ActiveCN104084705AEfficient and fully automatedIncrease productivityWelding/cutting auxillary devicesAuxillary welding devicesBottleSoldering gun
The invention discloses a gas filling bottle welding swinging frame and a working method thereof. The gas filling bottle welding swinging frame is fixed on a machine frame through an L-shaped connecting piece, the L-shaped connecting piece is fixedly connected with a translation base plate, the translation base plate is provided with a movable table driven by a screw rod and a screw rod nut, and a hand wheel is installed at the end of the screw rod. The vertical column is fixedly installed on the movable table, a clamping sleeve is installed on the column, a beam is installed on the clamping sleeve, a swing device is installed at the end of the beam, and a welding gun is fixedly clamped on the swing device. The working method comprises the steps of feeding, welding and blanking and the like. The gas filling bottle welding swinging frame can greatly improve gas filling bottle production efficiency and reduce manpower resource investment.
Owner:无锡市迪索数控焊接设备有限公司
Assembly device and welding method using same
ActiveCN105215618AEnsure high precision requirementsGuaranteed coaxialityWelding/cutting auxillary devicesAuxillary welding devicesPipe fittingIndustrial engineering
The invention discloses an assembly device and a welding method using the same. The assembly device comprises a base, the base is provided with a supporting base, the supporting base is provided with a supporting platform used for supporting work-pieces, and a moving base used for supporting the work-pieces is arranged at the position, close to the end of the supporting base, of the base. According to the technical scheme, the size requirement for high accuracy between two assembled pipes and between flanges and pipes can be met, and assembly welding of lots of pipes of large and heavy work-pieces and assembly welding of the flanges and the pipes of the large and heavy work-pieces can be achieved at the same time; the assembly welding efficiency is high; controllable fine adjustment of distance between the large and heavy work-pieces can be achieved, the labor intensity of workers is low, adjustment is convenient, and the coaxiality can be well guaranteed; assembly welding of the work-pieces of the same specification can be achieved fast and efficiently.
Owner:HIMILE MECHANICAL MFG
Workpiece micro shock excitation device and workpiece micro shock excitation method for vibration machining
ActiveCN104923470ARealize micro-excitation machiningEnsure high precision requirementsMeasurement/indication equipmentsMechanical vibrations separationMotor driveMonitoring system
The invention discloses a workpiece micro shock excitation device and a workpiece micro shock excitation method for vibration machining, in order to solve the problem that no simple and practical workpiece micro shock excitation device or workpiece micro shock excitation method for the vibration machining exists at present. The workpiece micro shock excitation device is characterized in that a servo motor drives an eccentric shaft; an eccentric groove at the bottom of a vibration table is tangent with an eccentric wheel of the eccentric shaft; n pin rollers are equally divided into two groups to be arranged on the two sides of the eccentric shaft; two sliding blocks are arranged on the two sides of the bottom of the vibration table; and the top and the bottom of each sliding block correspond to one group of pin rollers to form a rolling pair. The workpiece micro shock excitation method for the vibration machining comprises the steps as follows: a workpiece is arranged at the top of a three-directional force sensor and clamped by a fixture; the servo motor drives the eccentric shaft to excite the vibration table to vibrate; and a monitoring system monitors and optimizes workpiece vibration cutting, and controls the servo motor to adjust the vibration frequency of the workpiece. According to the workpiece micro shock excitation device and the workpiece micro shock excitation method for the vibration machining, workpiece micro shock excitation machining can be realized efficiently, and the micro displacement vibration frequency and the cutting carrying capacity of the workpiece are monitored, detected and diagnosed in real time.
Owner:长沙启铭机电设备有限公司
Damage control method for ultraprecision turning of crystal material
ActiveCN107199642AGuaranteed extensionReduce thicknessAfter-treatment detailsFine working devicesHigh energy acceleratorEngineering
The invention relates to a damage control method for ultraprecision turning of a crystal material. The damage control method for ultraprecision turning of the crystal material comprises the steps that a multi-layer amorphous system is designed according to the to-be-machined material and cutting parameters, the number, the depth and the thickness of amorphous layers are determined, the ion irradiation process is simulated through the Monte Carlo numerical method, and an ion source, implantation energy and the dosage combination are worked out; ion irradiation is conducted through an ion implanter or a high-energy accelerator according to the worked-out implantation parameters, and a multi-layer amorphous structure in the material is prepared; the allowable maximum feed rate for turning is determined according to the arc radius of a tool, the cutting depth, geometrical parameters of the amorphous layers, and the brittleness-plasticity conversion thickness of the workpiece material; and planar machining is conducted on a modified crystal according to the turning parameters.
Owner:TIANJIN UNIV
Method for estimating pose of refueling cover of automatic refueling robot
PendingCN113610922AHigh precision requirementsImplement IntelliSenseImage analysisComputer visionFuel dispenser
The invention discloses a method for estimating the pose of a refueling cover of an automatic refueling robot, and is applied to the technical field of automatic refueling of a fuel vehicle. A scheme of combining passive binocular stereoscopic vision and visual servo is provided, wherein the passive binocular stereoscopic vision is used for sensing environmental information, and the pose information of a refueling cover grabbing point is obtained by using a stereoscopic matching technology; in addition, a visual servo method is added; a passive binocular camera is responsible for a coarse positioning part of an early-stage perception task, that is, the process of calculating pose information of the grabbing point through a binocular stereo matching method; and visual servo carries out fine positioning on the basis of coarse positioning, that is, the process of guiding a mechanical arm to move to the position of the grabbing point through a visual servo technology, so that it is guaranteed that the mechanical arm moves to the refueling cover grabbing point position, the refueling cover is unscrewed subsequently, and a refueling gun stretches into the refueling cover for refueling.
Owner:BEIJING INSTITUTE OF TECHNOLOGYGY
Fixture for roof prism gluing part production
The invention discloses a fixture for roof prism gluing part production, and belongs to the technical field of optical component production. The fixture for roof prism gluing part production comprises a base, two limit blocks, three square flat plates, a 45-degree rest and a square brick. Glue grooves are formed in the middles of the limit blocks, a glue groove is formed in the middle of a large surface of the 45-degree rest, the square brick has a 90-degree angle, angular accuracy is within 1', the two limit blocks are vertically used, the three square flat plates are placed among the two limit blocks and the base and between a semi-finished product and the base, the surface evenness of the base is lambda / 4, the finish degree of the base is second level, accuracy of the 90-degree angle of the limit blocks is within 30', and the tolerance of the square flat plates is + / -0.01mm. Processing accuracy of a roof ridge surface is ensured, processing cycle is shortened, working efficiency and angular accuracy are improved, dimensional errors are decreased, and product qualification ratio is increased.
Owner:JIANGNAN OPTICS CO LTD
Precise forming powder in type of top tightened frame mount
An accurate powder compacting machine with prestressed frame is composed of enclosed frame-type main body, main cylinder assembly and bottom cylinder assembly. Said main cylinder assembly installed at upper part of main body consists of main cylinder, and nested cylinder fixed to the top of piston rod of main cylinder. Its advantages are less tensional deformation, high rigidity, and high machining accuracy. It is suitable for shaping the workpiece with complex shape and central hole.
Owner:SOUTH CHINA UNIV OF TECH
Combined mold for processing gas thrust bearing bump foil of elastic foil sheet
The invention relates to a combined mold for processing gas thrust bearing bump foil of an elastic foil sheet, which comprises a bump foil processing mold ring 1, a bump foil processing mold ring 2, a bump foil processing mold ring 3, a bump foil processing mold ring 4, a bump foil processing mold ring 5, a bump foil processing mold ring 6 and a bump foil processing mold ring 7 which are nested and combined, wherein the bump foil processing mold rings (1-7) are connected together through a positioning cylinder 9, and bolts 8 are arranged at two ends of the positioning cylinder 9. A new combined mold structure can be formed by rotating one of the mold rings. The invention has the characteristics of compact structure, combined processing, low cost and high precision.
Owner:XI AN JIAOTONG UNIV
Turning fixture for once clamping processing of valve
InactiveCN102179713ASolving Machining ComplexitySolve the processing technologyPositioning apparatusMetal-working holdersEngineeringGasket
The invention discloses a turning fixture for once clamping processing of a valve, wherein bottom outer side walls of a support block (6) and an angle iron module (1) are horizontal; a bottom central hole of the angle iron module is tightly matched with the central hole of the support block; a T-shaped bolt (5) is placed in the support block (6) through an opening slot, passes through two throughholes on the bottom of the angle iron module (1) and then is fixed by a locking nut (2); a correcting block which is leveled is fixed on the support block (6) through a bolt (4); bottoms of two hanging bolts (10) are respectively arranged in the support block (6); top mounting pressing blocks (11) of the two hanging bolts (10) are fixed by hanging nuts (12); and a rotary spindle (8) is connected to the central hole of the support block (6) and the central hole of the angle iron module (1) through a gasket (7), thereby integrally forming the turning fixture. By using the turning fixture, the threads and openings at two ends of the valve can be once fixed and successfully processed by using a common lathe or a numeric control lathe, the cost is lowered, the processing efficiency is increased, and the problem of difficult processing of similar parts is thoroughly solved.
Owner:JIANGSU JINSHI VALVE
Dual-servo motor control device for flat plate type digital ink-jetting printing machine
InactiveCN102501631AHigh precision printingEasy to installTypewritersPower drive mechanismsDigital inkCost performance
The invention provides a dual-servo motor control device for a flat plate type digital ink-jetting printing machine. Two high-precision servo motors 1 and 2 are adopted, wherein the servo motor 1 is used for controlling motions of a nozzle group in a width direction of a printed textile, and the servo motor 2 is used for controlling motions of a machine head subassembly in a length direction of the printed textile. Furthermore, the servo motor 2 is connected with the servo motor 1 by a signal converting device, so that the synchronous intermittent movement which is complementary in time of the servo motor 1 and the servo motor 2 is accurately traced. Therefore, the heights of the motions of the machine head subassembly are coordinated and consistent, and the high-precision requirement in printing can be effectively ensured. The device can be directly applied to the ordinary flat plate type digital ink-jetting printing machine and has the advantages of convenience for entire installation and high cost performance.
Owner:JIANGNAN UNIV
Assembly process of blind hole tool with high precision requirement
ActiveCN111168326AReduce dependency on skill levelGuaranteed accuracy requirementsStructural engineeringMachine
The invention belongs to the field of machining, and relates to an assembly process of a blind hole tool with a high precision requirement. The assembly process comprises the following steps of 1) processing a base, and ensuring the parallelism of two surfaces of the thickness of the base and the perpendicularity with an alignment reference surface; 2) processing a support plate, and ensuring theparallelism of the two surfaces of the thickness of the support plate and the perpendicularity with the bottom surface; 3) processing a support, and ensuring the parallelism of the two of the thickness of the support and the perpendicularity with the bottom surface; 4) processing a positioning plate; 5) processing a guide plate; 6) assembling the base, the support and the positioning plate into anintegral structure, fixing the integral structure on a workbench of the coordinate boring machine, machining a blind hole in the support by adopting a boring cutter, axially lifting the boring cutter, assembling the support plate on the base, replacing the boring cutter, and machining a through hole in the support plate on the support plate; and 7) assembling the guide plate on the support by anadjusting assembly method. According to the assembly process of the blind hole tool with the high precision requirement, the requirement for the assembly form and location tolerance is met, dependenceon the skill level of workers is reduced, and the assembly qualification rate can be greatly increased.
Owner:XIAN AERO ENGINE CONTROLS
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