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    Non-destructive detecting method for weld residual stress and a probe using the same
    2.
    发明授权
    Non-destructive detecting method for weld residual stress and a probe using the same 有权

    公开(公告)号：US11320405B2

    公开(公告)日：2022-05-03

    申请号：US16684900

    申请日：2019-11-15

    Applicant: BEIJING INSTITUTE OF TECHNOLOGY

    Inventor： Chunguang Xu ,  Yuren Lu ,  Dezhi Li ,  Peng Yin

    IPC: G01N29/24 ,  G01N29/22 ,  G01L5/00

    Abstract: The present disclosure provides a non-destructive detecting method for weld residual stress and a probe using the same, in the above method, detecting is performed by an ultrasonic detecting probe in contact with a detected portion of a workpiece to be detected, wherein when the weld residual stress of an intersecting curve weld bead of surfaces of cylinders is detected, for the same position of the intersecting curve weld bead, one of the residual stress of an axial direction of the cylinders and the residual stress of a circumferential direction of the cylinders is detected as a principal stress. For the surface of the cylinder at one side of the intersecting curve weld bead, the detecting of the weld residual stress of the surface of the cylinder can be realized only by using an ultrasonic detecting probe having one type of curved surface.

    ULTRASONIC MONITORING PROBE FOR INTERNAL SERVICE STRESS OF A MARINE STRUCTURAL COMPONENT
    4.
    发明申请
    ULTRASONIC MONITORING PROBE FOR INTERNAL SERVICE STRESS OF A MARINE STRUCTURAL COMPONENT 有权

    公开(公告)号：US20210382014A1

    公开(公告)日：2021-12-09

    申请号：US17329585

    申请日：2021-05-25

    Applicant: BEIJING INSTITUTE OF TECHNOLOGY

    Inventor： Chunguang Xu ,  Shuangyi Li ,  Yuren Lu ,  Peng Yin ,  Dezhi Li ,  Wenyuan Song

    IPC: G01N29/24 ,  G01N29/28

    Abstract: An ultrasonic monitoring probe for internal service stress of a marine structural component. The probe includes a detection wedge provided with two symmetrically arranged inclined surfaces at its top, two connecting channels vertical to the two inclined surfaces and penetrating through the detection wedge and provided with threaded holes close to the inclined surfaces and water storage cavities far away from the inclined surfaces, two ultrasonic transducers mounted in the threaded holes of the two connecting channels and configured for generating and receiving ultrasonic waves; two bottom rings located at a bottom of the detection wedge and arranged relative to the water storage cavities and configured for attachment to a surface of a detected component, a magnet disposed in a magnet placement hole arranged at a central position between the two connecting passages, and a monitoring device electrically connected with the two ultrasonic transducers.

    Device and a method for reducing and homogenizing residual stress of a workpiece generated during machining
    6.
    发明授权
    Device and a method for reducing and homogenizing residual stress of a workpiece generated during machining 有权

    公开(公告)号：US11542570B2

    公开(公告)日：2023-01-03

    申请号：US16878892

    申请日：2020-05-20

    Applicant: BEIJING INSTITUTE OF TECHNOLOGY

    Inventor： Chunguang Xu ,  Dezhi Li ,  Yuren Lu ,  Ruili Jia ,  Peng Yin

    IPC: B06B1/06 ,  B06B3/00 ,  C21D10/00

    Abstract: The present disclosure provides a device and a method for reducing and homogenizing residual stress during machining in which a workpiece is fixed, such as milling, boring, drilling and planning, with which high-energy acoustic waves are emitted to the workpiece via a tight contact between a plurality of high-energy wave exciters on a bench and a workpiece coated with a coupling medium, and residual stress inside the machined workpiece is reduced and homogenized through elastic wave energy generated in the workpiece by the high-energy acoustic waves. In this way, the purpose of reducing and homogenizing the residual stress while machining is achieved, realizing a stress-free machining, and the deformation of the workpiece during and after machining is minimized.

    DEVICE AND METHOD FOR ULTRASONIC DETECTING OF MECHANICAL MEMBER BASED ON MAGNETIC FLUID COUPLING
    7.
    发明申请
    DEVICE AND METHOD FOR ULTRASONIC DETECTING OF MECHANICAL MEMBER BASED ON MAGNETIC FLUID COUPLING 有权

    公开(公告)号：US20220026292A1

    公开(公告)日：2022-01-27

    申请号：US17377162

    申请日：2021-07-15

    Applicant: BEIJING INSTITUTE OF TECHNOLOGY

    Inventor： Chunguang Xu ,  Shuangyi Li ,  Yuren Lu ,  Peng Yin ,  Dezhi Li ,  Wenyuan Song

    IPC: G01L1/25 ,  G01N29/07 ,  G01N29/24 ,  G01L1/26

    Abstract: A device and a method for ultrasonic detecting a mechanical member based on magnetic fluid coupling. The device comprises a magnetic field generating apparatus, magnetic fluid and an ultrasonic probe. The magnetic field generating apparatus has a cylindrical structure, into which the magnetic fluid is injected, where an upper portion of the apparatus is provided with the ultrasonic probe a front end that vertically extends into a liquid level of the magnetic fluid, and a bottom portion of the apparatus covers a detected position of a member under detection. The magnetic fluid at least contains magnetic suspension particles and oil-based or water-based liquid. With the device and the method, the ultrasonic probe is coupled with the member under detection to realize ultrasonic detecting of the service stress of the member under detection.

    ULTRASONIC TEST DEVICE AND TEST METHOD FOR SERVICE STRESS OF A MOVING MECHANICAL COMPONENT
    8.
    发明申请
    ULTRASONIC TEST DEVICE AND TEST METHOD FOR SERVICE STRESS OF A MOVING MECHANICAL COMPONENT 有权

    公开(公告)号：US20210389195A1

    公开(公告)日：2021-12-16

    申请号：US17331045

    申请日：2021-05-26

    Applicant: BEIJING INSTITUTE OF TECHNOLOGY

    Inventor： Chunguang Xu ,  Shuangyi Li ,  Yuren Lu ,  Peng Yin ,  Dezhi Li ,  Wenyuan Song

    IPC: G01L1/25 ,  G01L5/00

    Abstract: An ultrasonic test device and test method for service stress of a moving mechanical component, where the device comprises an ultrasonic probe, a coupling fluid, a pressure-maintaining cover and universal wheels. The cover is vertically arranged above an inspected position of an inspected component, an interior of the pressure-maintaining cover is filled with coupling fluid, a bottom of the cover is provided with a structure permeable to the coupling fluid to form a coupling fluid film between the inspected position and the bottom of the cover, and a top of the cover is equipped with the ultrasonic probe. A detection part at a lower part of the ultrasonic probe extends into the coupling fluid of the cover and is vertical to the bottom of the cover without contact. The distance between the ultrasonic probe and the inspected component is kept unchanged through the universal wheels.

    Device for controlling deformation of a large-scale crankshaft
    9.
    发明授权
    Device for controlling deformation of a large-scale crankshaft 有权

    公开(公告)号：US12103092B2

    公开(公告)日：2024-10-01

    申请号：US17394721

    申请日：2021-08-05

    Applicant: BEIJING INSTITUTE OF TECHNOLOGY

    Inventor： Chunguang Xu ,  Yuren Lu ,  Peng Yin ,  Peilu Li ,  Dezhi Li ,  Shuangyi Li ,  Wenyuan Song ,  Zhaowei Miao

    IPC: B24B5/18 ,  B23B5/18 ,  B23P25/00 ,  B24B1/04 ,  C21D10/00

    CPC classification number: B23B5/18 ,  B24B1/04

    Abstract: A device for controlling deformation of a large-scale crankshaft comprising a crankshaft holder that is arranged for fixing the crankshaft so that the crankshaft is aligned with an axis; a regulatory bracket that is arranged on the crankshaft holder at a position corresponding to the crankshaft; and a high-energy acoustic beam transducer that is arranged on the bracket and is provided with an end part coupled with the crankshaft. The crankshaft is fixed through the crankshaft holder, high-energy ultrasonic waves are injected into the crankshaft by the transducer, mass points in the crankshaft are driven to vibrate along the acoustic beam direction, and machining residual stress of the crankshaft is removed through the high-energy acoustic beam to realize the regulation and control of the residual stress in the material in the specific direction, so that machining precision of the crankshaft is ensured and machining deformation of the crankshaft is reduced.

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