307results about How to "For precise control" patented technology

The invention discloses a cold-hot compound die molding method for an aluminum alloy sheet metal component, and relates to a molding method for a sheet metal component. The invention aims to solve the technical problems that the conventional hot-state molding method for the aluminum alloy sheet metal component is low in molding efficiency and can easily cause local crinkles and fractures, and provides the cold-hot compound die molding method for the aluminum alloy sheet metal component. The cold-hot compound die molding method comprises the following steps of: 1, heating a lower die to a temperature of between 200 and 900 DEG C; 2, placing an aluminum alloy plate blank on the lower die and heating the aluminum alloy plate blank to the deformation temperature of the aluminum alloy plate blank; 3, closing the die to press the aluminum alloy plate blank into the aluminum alloy sheet metal component; 4, separating the aluminum alloy sheet metal component, an upper die and a blank holder from the lower die; and 5, cooling the upper die and the blank holder, keeping the temperature for a certain period of time, and taking the aluminum alloy sheet metal component down to finish the cold-hot compound die molding of the aluminum alloy sheet metal component. According to the method, a cold-hot compound die in which the upper die is in a cold state and the lower die is in a hot state is adopted to mold the aluminum alloy sheet metal component. The cold-hot compound die molding method is suitable for making the aluminum alloy sheet metal component.

The invention relates to a horizontal well forced gas drainage method with coal bed gas subjected to staged fracturing. In order to solve the problems that hole forming performance of horizontal drilling in a coal bed is poor and buried drill accidents can happen easily and to achieve the forced gas drainage effect on tectonic soft coal, the well track of a horizontal well is controlled in mudstone or sand stone with a certain range above a coal bed top boundary, and the horizontal well is docked with a drainage vertical well at a far end. An ultra deep penetration perforating technology is used, according to the requirement for certain hole density and orientation, orientated perforating is conducted downwards on the horizontal well section in a segmented mode, a steel sleeve, a well cementation cement ring and a mudstone top plate are penetrated, and the horizontal well is communicated with a target coal layer below. Then, a clear water sand carrying fracturing technology is used, staged fracturing is conducted on the target coal bed according to the requirements for large discharge capacity, large liquid amount, high prepad fluid ratio, large sand amount and middle sand ratio, and the purpose of increasing production is achieved.

The invention discloses an incremental forming indenter for sheet material with an adjustable pressure. The indenter comprises a forming indenter cylinder body, wherein a forming motor is fixedly mounted at the upper end of the cylindrical forming indenter cylinder body; a forming ball head is moveably arranged at the lower end of the forming indenter cylinder body via a ball cup, and the forming ball head is provided with an overhang ball cap part which extends out of the lower end of the forming indenter cylinder body; a transmission pair composed of a screw rod and a screw nut, and a pressure sensor are sequentially arranged from top to bottom in an inner cavity of the forming indenter cylinder body, and the pressure sensor is positioned between an upper backing plate and a lower backing plate; the screw rod is connected with an output shaft of the forming motor, and the screw nut is supported on the upper backing plate; and a ball head spring is supported between the lower backing plate and the ball cup. Based on the principle of 'layered manufacture', a thin-shell piece with a required shape is produced by adopting the layered incremental forming, therefore, the indenter is characterized by high machining accuracy, good surface quality, accurate and stable forming, adjustable and controllable pressure, etc., and is widely applicable to the forming processes of various complex curved shapes and various trial-manufacture stamping parts in small amount.

The invention discloses a near-net forming method of the 3D braided fiber reinforced metal-based composite material, and belongs to the technical field of advanced composite materials. The method is characterized in that a vacuum air pressure infiltration preparation technology based on a liquid binder is adopted to assist in accurately controlling the shape and the size of a 3D braided fiber preform structure; in the 3D weaving process of the fiber preform, a liquid binder is adopted to accurately fix and shape the 3D braided fiber preform, then the size precision of the 3D braided fiber reinforced metal-based composite material is accurately controlled through the impregnated graphite mold of the embedded fiber preform, and deformation and local fiber polarization of the 3D braided fiberpreform in the infiltration process are prevented. The prepared 3D braided fiber reinforced metal-based composite material has high dimensional accuracy and excellent mechanical properties, the near-net forming of the 3D braided fiber reinforced metal-based composite material is realized, batch industrial production can be realized, the near-net forming method has a wide application prospect in the fields of aerospace, national defense, military and the like.

The invention discloses a control method of roll gap punching in sector segment slight press control technique, which includes the following steps: (1) the target gap values of the rolls at the inlet and the outlet sides of the sector segment are set; (2) the target roll gap values are converted into target hydraulic cylinder position values and transferred to a hydraulic system, wherein, the calculation formula of converting the target roll gap values into target hydraulic cylinder position values is: Xec = {[L-(a+a2)]/L}.Xe.costhelta1+[(a+a2)/L].Xd.costhelta2 Xdc = [(b+b2)/L].Xe.costhelta1+{[L-(b+b2)]/L}.Xd.costhelta2; (3) after receiving the target hydraulic cylinder position values, the hydraulic system controls the stroke of the hydraulic cylinder piston to move the hydraulic cylinder piston to the position indicated by the target hydraulic cylinder position values; (4) the movement of the hydraulic cylinder piston drives the roll to move to achieve the set target roll gap target values, thus achieving the control of the roll gaps. The invention is capable of achieving the precise control of the roll gaps via the hydraulic system.

The invention provides a clamping rotary cutting type underactuated two-finger grape picking device, which mainly comprises underactuated finger mechanisms, a rotation mechanism, a pushing mechanism, a rotary cutting mechanism, a wrist connecting mechanism, a main support plate and a binocular camera, wherein the underactuated finger mechanisms are distributed at two sides of the main support plate; the wrist connecting mechanism is connected with the rotation mechanism; the rotation mechanism is connected with the main support plate; the pushing mechanism is connected with the rotation mechanism; the rotary cutting mechanism is connected with the pushing mechanism; the wrist connecting mechanism is connected with the waist of a mechanical arm; a motor A drives the underactuated finger mechanisms to move; through the effects of an S-shaped pressure sensor, a potentiometer, a flat plate pressure sensor and a tension spring, the flexible target object gripping and the closed loop real-time control on the underactuated finger mechanisms by a controller are realized; the rotary cutting mechanism controls a circular disc cutter blade to realize rotary cutting action on target fruit stems through a direct current motor. The grape picking device has the advantages that the structure is ingenious; the flexibility is high; the finger pose work space is large; high picking success rate can be obtained; the mechanical damage to plants and fruits can be reduced; the picking on clustered fruits such as grapes can be realized; the characteristics of self-adaption capability to the fruit shape and contact force controllability are realized.

The invention belongs to the field of technical processes for cast aluminium alloys, and specifically relates to a continuous casting and rolling method for ZL114A welding wire rods. The method comprises the following steps: raw material weighing and preparation; aluminium alloy smelting, and online degassing and deslagging; modification treatment; grain refinement, alloy blank continuous casting; casting blank induction heating; casting blank hot-continuous rolling; wire solution treatment; and wire winding. The method disclosed by the invention overcomes the shortages of the prior art; online detection and accurate control can be realized for the chemical components of the produced aluminium alloy wire blanks; the alloy has a low hydrogen content inside and less inclusion, and is almost free from segregation; welding wires are good in welding manufacturability, and free from splashing and chip falling during a use process; welding arcs are stable; and welded joints have high interior quality and mechanical property.

The present invention discloses an indoor parking stall accurate guidance system and method based on the WiFi. The system concretely comprises three parts consisting of an outdoor navigation module, an indoor parking stall accurate guidance module and a reverse vehicle tracking module. The outdoor navigation module is achieved mainly based on development of an outdoor parking guidance subsystem and a mobile communication terminal by employing a third-party platform, and a personal reputation evaluation system is added in the system; and the indoor parking stall accurate guidance module and thereverse vehicle tracking module achieve indoor parking stall accurate guidance of a vehicle and reverse vehicle tracking guidance of a user indoor parking stall by mainly employing WIFI location, a route guidance subsystem, an ultrasonic wave-indicating lamp-parking lock integration subsystem, the mobile communication terminal and a server. The indoor parking stall accurate guidance system and method based on the WiFi combine outdoor navigation and indoor parking stall accurate guidance, and therefore, the management level of parking facilities is improved and full utilization of parking resources is promoted to facilitate alleviate road traffic congestion.

The plug-and-play mechanical arm system based on distributive control in robotic technology includes system unit, USB interface module, central controller, internal distributive control system and mechanical arm. The system unit is connected via a USB cable with USB interface module, and the central controller is located between the USB interface module and the internal distributive control system, which are connected to the central controller via parallel bus. The internal distributive control system consists of several parallel subsystems with the same functions, and each of the subsystems includes one PID controller, one DC motor driver and one DC motor with feedback; and connected via control lines to the mechanical arm. The present invention provides complete interface and control scheme for the popular future robot.

The invention discloses a 4D printing process method capable of presetting internal stress. Different grades of thermal expansion coefficient materials are used to construct a composite system, so that different thermal expansion coefficient materials change with temperature environment and the like during processing to produce different degrees of strain an stress; a 3D printed additive manufacturing process or a 3D printing process and traditional processing manner mixed process is used for preparing samples; energy accumulation and internal stress distribution control of different spatial position materials are realized through ordered and controllable change of material composition manner, external environment and printing process parameters. The 4D printed composite system constructedthrough composition printing of multiple materials lays a material foundation for stress control during printing, and accurate control of stress, strain and deformation of samples during printing arerealized under the control of multiple factors such as material distribution, process parameters and environment parameters in the printing process.

The invention provides a single side soft absorption type automatic drilling robot which is applicable to operation such as hold drilling, reaming, dimpling and the like at wings and fuselage parts, and the machining for materials which are hard to machine such as titanium alloy (Ti) and composite materials (CPRF) is realized. The robot is fixed at an expected machining area by using a gas source provided by a vacuum generator and by using a vacuum chuck; and a soft track can adapt to different machining curves according to different curvature. The positioning of a drilled hole and the adjustment of the verticality of a drill bit are realized according to a drill plate. A pneumatic main shaft is adopted as the main shaft of the robot; and in combination of an ultrasonic vibration machining technology, the quality and efficiency of the machining are improved; the machining difficulty is reduced; the current detection at a feeding direction can be carried out in real time during the hole making process; and the protection and precise control for the machining process are realized.

The invention relates to a control method and a control system for integral vehicle load computation. The control method includes: acquiring an engine speed, a rotating speed of an output shaft of a gearbox and engine torque when a brake pedal is not in a braking state and a clutch is in a slipping friction state; determining a theoretical acceleration speed of an integral vehicle according to the engine speed and the engine torque; computing an actual acceleration speed of the integral vehicle according to the rotating speed of the output shaft of the gearbox; determining the load of the integral vehicle according to a ratio of the actual acceleration speed and the theoretical acceleration speed of the integral vehicle and an accompanying mass of the integral vehicle. The control method and the control system solve the problem of inaccuracy in integral vehicle control and are capable of reducing energy waste and improving power performance and economic performance of the integral vehicle.

The invention provides an engineering project intelligent dynamic safety supervision system based on BIM, and the system comprises: a model building module which is used for building an engineering project BIM model according to the basic information of an engineering project; a project management and control module which is used for associating the construction progress of the engineering projectwith an engineering project BIM model to form an engineering project 4D BIM model; a safety analysis module which is used for analyzing dangerous large projects in the engineering project 4D BIM model according to the engineering project 4D BIM model and marking corresponding dangerous large project information in the engineering project 4D BIM model; and a safety supervision module which is usedfor monitoring the on-site construction process of the dangerous large project, acquiring on-site safety management information, and performing safety risk assessment and safety risk management according to the on-site safety management information. The intelligent dynamic safety management and control system is helpful for acquiring basic information of a project, analyzing dangerous large projects in the project by combining with the support of a database, and carrying out key safety supervision, analysis and management and control on the dangerous large projects, so that the efficiency ofengineering project safety supervision is improved.

A splitter valve for splitting an inlet stream into a plurality of outlet streams. The valve comprising an inlet (31) and a plurality of outlets, one for each outlet stream. An outer sleeve (20) has a plurality of first outlet orifices (32, 33), one for each stream. An inner element (30) is moveably retained within the outer sleeve and has an inlet and a plurality of second outlet orifices (32, 33), one for each stream. The relative proportion of the inlet stream fed to each outlet is determined by the relative position of the inner element and outer sleeve. The first and second outlet orifices are shaped such that the flow through each outlet varies substantially linearly with the relative position of the inner element and outer sleeve.