Abstract: A multi-angle two-dimensional ultrasonic vibration assisted nanofluid micro-lubrication grinding device includes a workpiece fixture for clamping a workpiece and a grinding wheel for grinding the workpiece, the fixture being connected with a two-dimensional ultrasonic vibration device to maintain the sharpness of the grinding wheel cutting edge and cool the grinding temperature on the workpiece surface; a jetting mechanism used for jetting nanofluid to the workpiece is arranged on one side of the grinding wheel so as to form two-dimensional ultrasonic vibration and nanofluid micro-lubrication grinding coupling; the device applies the variable-angle two-dimensional ultrasonic vibration technology to grinding processing, and adjusts the angles of two ultrasonic vibrators to generate different combined vibration directions to change the relative movement trajectories of abrasive particles and a workpiece.

Abstract: The disclosure provides a milling system and method under different lubrication conditions. The system uses a tool to mill the workpiece, a force measuring system to measure the milling force, a tool change system to replace the tools, a tool storage to store the tools. It can store the tools, provide the lubricating oil to the milling surface, select different tools according to different processing conditions, select the best angle differences of the unequal spiral angle tools according to different conditions comprising dry cutting, casting-type lubrication, minimal quantities of lubrication or minimal quantities of nanofluid lubrication, and/or choose the optimal tool according to different cutting parameters in order to obtain the minimum milling force.

Abstract: The disclosure provides a method and system for milling injected cutting fluid under different working conditions. By analyzing influence of airflow fields in a milling area under different working conditions on injection of cutting fluid, an influence rule of a helical angle and a rotation speed of a cutter on the flow field is quantitatively analyzed, an optimal target distance of a nozzle, an angle between the nozzle and a milling cutter feeding direction and an angle between the nozzle and the surface of a workpiece are comprehensively determined, the nozzle is set according to a determined setting manner, and lubricating oil is sprayed to the milling area by utilizing the nozzle.

Abstract: The present invention discloses a tool device for auxiliary chip breaking and a tool system for auxiliary chip breaking under different lubricating conditions, which solves the problem that long chips affect the surface quality of a workpiece in the prior art and has the beneficial effects of realizing chip breaking and wide scope of application. The solution of the present invention is as follows: the tool device for auxiliary chip breaking includes a cutting mechanism for cutting the workpiece, arranged above the workpiece; a tool magazine mechanism, including a first rotating mechanism and a plurality of tools connected with the first rotating mechanism; and a tool changing mechanism, including a second rotating mechanism and manipulators connected with the second rotating mechanism, and arranged between the tool magazine mechanism and the cutting mechanism.

Abstract: The present invention relates to a milling machine processing system with an intelligently follow-up cutting fluid nozzle and a working method. The milling machine processing system comprises a workpiece stage, wherein a milling machine box body is arranged above the workpiece stage; a milling cutter mechanism is mounted on the milling machine box body for processing workpieces on the workpiece stage; a rotating mechanism is mounted on an end surface of the milling machine box body located at one side of a milling cutter; the rotating mechanism is connected with a two-axis linkage mechanism and drives the two-axis linkage mechanism to rotate about a center line on which the milling cutter is located; the two-axis linkage system is connected with a nozzle through an angle adjusting mechanism and is used for adjusting a position and an angle of the nozzle.

Abstract: The present invention discloses an MDOF (multi-degree-of-freedom) micro-lubrication intelligent spray head system for a CNC milling machine, comprising an annular rotating platform, a longitudinal telescopic part, a rotating part, an intelligent spray head mounting platform and an information acquisition system. The annular rotating platform comprises a rotating piece which rotates along a horizontal circumferential direction; a bottom of the rotating piece is connected with at least one longitudinal telescopic part; a lower end of the longitudinal telescopic part is connected with the rotating part; the rotating part rotates within a set angle range by taking a point connected with the longitudinal telescopic part as an axis; the intelligent spray head mounting platform is connected with the rotating part and moves along with the rotating part; and the information acquisition system is mounted on the intelligent spray head mounting platform.

Abstract: The present invention discloses an integrated online measurement system for thermophysical property parameters of nanofluid cutting fluid, consisting of a gas path system, a fluid path system, a nanofluid thermal conductivity measurement device, a measurement device for a convective heat transfer coefficient and a nanofluid/workpiece heat partition ratio of the nanofluid cutting fluid, and a grinding force and grinding temperature measurement device or a milling force and milling temperature measurement device; the nanofluid thermal conductivity measurement device is located in the fluid path system; the gas path system provides pressure for the nanofluid in the fluid path system, two nozzles lead out from the fluid path system, and the nanofluid gas spray ejected by the nozzle I is sprayed onto the surface of a workpiece I to form the measurement device for the nanofluid convective heat transfer coefficient and the nanofluid/workpiece heat partition ratio; and the nanofluid gas spray ejected by the nozzle II

Abstract: A NMQL grinding device of ultrasonic vibration assists grinding fluid micro-channel infiltration, and solves the problem that nanofluids are difficult to fully infiltrate the grinding zone in the prior art. Fully considers the impact of thickness of undeformed grinding debris on the grinding process and the lubrication state of single grains during material removal in the grinding process, the advantage of ultrasonic vibration assistance on improving the lubri-cooling performance of NMQL grinding is effectively achieved. According to the solution, the device includes an ultrasonic vibration mechanism capable of adjusting the spatial position of ultrasonic vibrators, the mechanism being arranged on a worktable; a NMQL grinding mechanism, arranged above a workpiece fixing table; and a grinding force measuring mechanism, including a dynamometer and a grinding force controller connected with the dynamometer, the dynamometer being arranged at the bottom of the ultrasonic vibration mechanism.

Abstract: A method of encapsulating a solid sample in a droplet, the method including flowing a continuous phase through a first fluid channel at a first flow rate; flowing a dispersed phase through a second fluid channel at a second flow rate, the dispersed phase including a plurality of particles, cells or beads; trapping the plurality of particles, cells or beads in a mixing region that receives the dispersed phase and the continuous phase; and reducing the first flow rate to encapsulate the trapped particles, cells or beads in droplets of the dispersed phase generated when the dispersed phase and the continuous phase exit the mixing region through an orifice.

Abstract: A continuous supply precision minimum quantity lubrication pump supporting different lubrication conditions, including a pump system, a gas source processor, a driving system, an oil cup, a water pump, a two-position three-way solenoid valve, a water tank and an emulsion storage tank, wherein the processor is connected with the pump system through a bidirectional joint, the oil cup is connected with the pump system through an oil cup joint, the water pump is installed in a driving box body of the driving system and is connected with the pump system through a hose, the water tank and the emulsion storage tank are connected with the two-position three-way solenoid valve, the two-position three-way solenoid valve is connected with the driving system, and the driving system and the water pump are respectively driven by a stepping motor I and a stepping motor II.

Abstract: An electrostatic atomization ultrasonic aided low-damage and controllable biologic bone grinding process and device, which solve the problem of debris blockage and have good cooling effect and high operation efficiency. The device includes: a spindle, arranged rotatably; a water-catching grinding tool for grinding a biologic bone, the spindle being connected with the tool through an ultrasonic vibration mechanism, the tool achieving longitudinal and rotary motions under the drive of the spindle and mechanism; a cooling and film forming mechanism on one side of the tool and connected with an ultrasonic generator in the mechanism, a nozzle connected with a medical nano liquid storage cup arranged at the bottom, compressed gas capable of being introduced into the nozzle to perform pneumatic-ultrasonic atomization on a medical nanofluid, the nanofluid being flushed into a grinding zone in droplets for effective cooling and lubrication; and an endoscope on the other side of the tool.

Abstract: A multi-angle two-dimensional ultrasonic vibration assisted nanofluid micro-lubrication grinding device includes a workpiece fixture for clamping a workpiece and a grinding wheel for grinding the workpiece, the fixture being connected with a two-dimensional ultrasonic vibration device to maintain the sharpness of the grinding wheel cutting edge and cool the grinding temperature on the workpiece surface; a jetting mechanism used for jetting nanofluid to the workpiece is arranged on one side of the grinding wheel so as to form two-dimensional ultrasonic vibration and nanofluid micro-lubrication grinding coupling; the device applies the variable-angle two-dimensional ultrasonic vibration technology to grinding processing, and adjusts the angles of two ultrasonic vibrators to generate different combined vibration directions to change the relative movement trajectories of abrasive particles and a workpiece.

Abstract: A microfluidic droplet system that employs flow-focusing methods to generate droplets of desired sizes for encapsulating particles, cells or beads. The microfluidic droplet system can comprise an air cavity that can be vibrated to reduce trapping of cells or beads in flow-focusing regions of the microfluidic droplet systems thereby increasing the encapsulation efficiency of the cells/beads.

Abstract: New Group III nitride based field effect transistors and high electron mobility transistors are disclosed that provide enhanced high frequency response characteristics. The preferred transistors are made from GaN/AlGaN and have a dielectric layer on the surface of their conductive channels. The dielectric layer has a high percentage of donor electrons that neutralize traps in the conductive channel such that the traps cannot slow the high frequency response of the transistors. A new method of manufacturing the transistors is also disclosed, with the new method using sputtering to deposit the dielectric layer.

Abstract: New Group III nitride based field effect transistors and high electron mobility transistors are disclosed that provide enhanced high frequency response characteristics. The preferred transistors are made from GaN/AlGaN and have a dielectric layer on the surface of their conductive channels. The dielectric layer has a high percentage of donor electrons that neutralize traps in the conductive channel such that the traps cannot slow the high frequency response of the transistors. A new method of manufacturing the transistors is also disclosed, with the new method using sputtering to deposit the dielectric layer.