公开(公告)号：US20230321740A1

公开(公告)日：2023-10-12

申请号：US17733117

申请日：2022-04-29

Applicant: Changsha University of Science and Technology

Inventor： Cong MAO ,  Ziyang CHEN ,  Yinghui REN ,  Wei LI ,  Yuanqiang LUO ,  Gang WU ,  Mingjun ZHANG ,  Kun TANG ,  Yongle HU ,  Feng SHI ,  Weidong TANG ,  Ci SONG

IPC: B23H5/10 ,  B23H5/12 ,  B23H5/06 ,  B24B7/22 ,  B23H9/00 ,  B24B7/24

CPC classification number: B23H5/06 ,  B23H5/10 ,  B23H5/12 ,  B23H9/008 ,  B24B7/228 ,  B24B7/24

Abstract: The invention provides an electrochemical discharge-assisted micro-grinding device for micro-components of brittle and hard materials. The device includes a micro-grinding tool, grinding fluid, a workpiece, an auxiliary electrode, a processing groove, and a pulsed DC power supply; the processing groove is filled with grinding fluid; the micro-grinding tool, the workpiece, and the auxiliary electrode are immersed in the grinding fluid; the micro-grinding tool is composed of a conductive grinding tool base, an electroplating layer, and insulated superabrasives. The micro-grinding tool is connected to the negative electrode of the pulsed DC power supply; the grinding fluid is composed of H2O2, Na2CO3, EDTA-Fe-Na, and deionized water; the workpiece material is brittle and hard; a large number of micro structures need to be produced on the surface of the workpiece.

公开(公告)号：US20230294189A1

公开(公告)日：2023-09-21

申请号：US17733109

申请日：2022-04-29

Applicant: Changsha University of Science and Technology

Inventor： Cong MAO ,  Weidong TANG ,  Yuanqiang LUO ,  Yinghui REN ,  Wei LI ,  Mingjun ZHANG ,  Kun TANG ,  Gang WU ,  Yongle HU ,  Feng SHI ,  Ziyang CHEN ,  Zhuo WEN

IPC: B23H9/02 ,  B23H3/02 ,  B23H3/08

CPC classification number: B23H9/02 ,  B23H3/02 ,  B23H3/08 ,  B23H2300/10

Abstract: This paper describes an invention involving an electrochemical discharge-enabled micro-grinding process for micro-components of silicon-based materials. The specific machining method is described below. A micro-grinding tool and an auxiliary electrode are respectively connected to the negative and positive electrodes of a pulsed DC power supply. When the current flows through the loop, an electrochemical hydrogen evolution reaction (HER) occurs at the micro-grinding tool in the grinding fluid, which generate multiple hydrogen bubbles. The bubbles coalesce into an insulating gas film and separate the micro-grinding tool from the grinding fluid; when the critical voltage is reached, the gas film is broken down and an electrochemical discharge occurs accompanied by discharge spark; under the action of the discharge spark, the surface material of the workpiece in the discharge-affected region is directly ablated to generate a heat-affected layer (HAL), namely, physical modification.

公开(公告)号：US20210268626A1

公开(公告)日：2021-09-02

申请号：US17321394

申请日：2021-05-14

Applicant: Changsha University of Science and Technology

Inventor： Cong MAO ,  Lairong YIN ,  Yujie ZHONG ,  Yongle HU ,  Yuanqiang LUO ,  Weidong TANG ,  Peihao CAI ,  Mingjun ZHANG ,  Yifeng JIANG ,  Aiming TANG

IPC: B24D5/02

Abstract: An orderly-micro-grooved PCD grinding wheel includes a wheel hub, a polycrystalline diamond (PCD) film, a number of micro-grinding units and a number of microgrooves. The PCD film is deposited on an outer circumferential surface of the wheel hub. The PCD film is processed by a water-jet guided laser device to form the microgrooves with high depth-width ratio and micro-grinding units with positive rake angles on the entire outer circumferential surface of the PCD film. An axial length of each micro-grinding unit and an axial length of each microgroove are equal to a thickness of the grinding wheel, respectively. The microgrooves are spaced apart by the micro-grinding units.