公开(公告)号：US20220025500A1

公开(公告)日：2022-01-27

申请号：US17380090

申请日：2021-07-20

Applicant: BEIJING INSTITUTE OF TECHNOLOGY

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

IPC: C22F3/00 ,  B06B1/02

Abstract: A device for reducing and homogenizing residual stress of a metal frame including a substrate, a frame fixing device and ultrasonic vibrators. A groove with an upward opening is provided in the middle of the substrate, and a shape enclosed by vertical side walls of the groove matches a shape of an outer frame of a metal frame to be processed. A plurality of through holes that are horizontally diverged are arranged around the side walls of the groove, and the through holes are vertically intersected with the groove. The ultrasonic vibrators are provided on the substrate and front ends of the ultrasonic vibrators extend into respective through holes to abut against the metal frame in the groove. The frame fixing device is also arranged in the groove where the metal frame is located, after the metal frame to be processed is placed in the groove.

公开(公告)号：US20210323161A1

公开(公告)日：2021-10-21

申请号：US17051072

申请日：2019-07-16

Applicant: BEIJING INSTITUTE OF TECHNOLOGY

Inventor： Chunguang Xu ,  Canzhi Guo ,  Juan Hao ,  Wanxin Yang ,  Xianchun Xu ,  Ruili Jia ,  Xinhao Zheng

IPC: B25J9/16 ,  G01N29/04 ,  G01N29/265 ,  B25J9/00

Abstract: An ultrasonic testing system of dual robot arms and an ultrasonic testing method for use in testing quality of surface and interior of a workpiece. The system includes an extension rod provided between a tail-end of a master robot arm and an emitting probe and/or between a tail-end of a slave robot arm and a receiving probe. One or more connected extension rod rotating shafts is provided between the extension rod and the emitting probe or between the extension rod and the receiving probe. The method uses an X-axis constraint method to convert posture data of the discrete points in a trajectory file of the tested workpiece into Euler angles, and constrain the X-axes of the auxiliary coordinate systems at the same time so that the positive direction of the X-axis of each of the auxiliary coordinate systems is the trajectory tangent direction.

公开(公告)号：US20210033566A1

公开(公告)日：2021-02-04

申请号：US16910993

申请日：2020-06-24

Applicant: BEIJING INSTITUTE OF TECHNOLOGY

Inventor： Chunguang Xu ,  Canzhi Guo ,  Juan Hao ,  Wanxin Yang ,  Xianchun Xu ,  Xinhao Zheng

IPC: G01N29/28 ,  G01N29/04

Abstract: An ultrasonic testing device that can make a robotic testing system reach the surface of a complex curved composite workpiece that is not easy to reach and perform a quality testing. By pumping a coupling liquid into the device so that the coupling liquid enters a waveguide and jets onto the surface of the workpiece, an ultrasonic wave can be transmitted in the waveguide and reach the surface of the workpiece and penetrate the workpiece, thereby achieving the purpose of quality testing of the workpiece. By providing two ultrasonic testing devices without a waveguide on both sides of a tested workpiece, respectively, and by mounting the waveguide on one side or both sides of the ultrasonic testing devices, it is possible to transmit the ultrasonic waves to the surface of the workpiece or to receive the ultrasonic waves from the surface of the workpiece.

公开(公告)号：US20200370143A1

公开(公告)日：2020-11-26

申请号：US16878892

申请日：2020-05-20

Applicant: BEIJING INSTITUTE OF TECHNOLOGY

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

IPC: 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.

公开(公告)号：US09989496B2

公开(公告)日：2018-06-05

申请号：US14647813

申请日：2013-03-12

Applicant: Beijing Institute of Technology

Inventor： Chunguang Xu ,  Lang Xu ,  Qinxue Pan ,  Dingguo Xiao ,  Xiao Li ,  Wentao Song

IPC: G01N29/04 ,  G01N1/28 ,  G01L1/25 ,  G01N3/00 ,  G01L5/00 ,  B23K31/02 ,  C21D9/46 ,  B23K31/12 ,  B23K103/04

CPC classification number: G01N29/04 ,  B23K31/02 ,  B23K31/125 ,  B23K2103/04 ,  C21D9/46 ,  G01L5/0047 ,  G01N3/00 ,  G01N2203/0296 ,  G01N2203/0298 ,  G01N2291/0421 ,  G01N2291/0423 ,  G01N2291/267

Abstract: A fixed value residual stress test block, comprising a main body (1) and two welded blocks (2); the main body (1) and the welded blocks (2) are all rectangular metal blocks; the welded blocks (2) are welded onto the two opposite side surfaces of the main body (1); the main body (1) is deformed under the upper and lower pressures and generates residual stress. The fixed value residual stress test block has a simple structure.

公开(公告)号：US20240091875A1

公开(公告)日：2024-03-21

申请号：US18353160

申请日：2023-07-17

Applicant: BEIJING INSTITUTE OF TECHNOLOGY

Inventor： Chunguang Xu ,  Wenjun Zhang ,  Bo Yang ,  Wenkai Li

IPC: B23K20/10 ,  B22F12/00 ,  B22F12/30

CPC classification number: B23K20/10 ,  B22F12/226 ,  B22F12/30 ,  B33Y30/00

Abstract: A multi-source self-adaptive low-stress additive manufacturing apparatus including a multi-axis manipulator additive manufacturing system, a high-energy sound beam regulation system, a substrate and a self-adaptive additive manufacturing workbench. The multi-axis manipulator additive manufacturing system includes multi-axis manipulator(s), welding torch(es), manipulator controller(s) and a guide rail, where base(s) of the multi-axis manipulator(s) is connected with the guide rail, the welding torch(es) is held by distal end(s) of the multi-axis manipulator(s), the multi-axis manipulator(s) is controlled by the manipulator controller(s) to move the welding torch(es) to conduct low-stress additive manufacturing on the workpiece to be additive manufactured. The high-energy sound beam regulation system includes one or more high-energy sound beam exciters, each having a high-energy sound beam excitation unit and a titanium alloy special adiabatic amplitude transformer so as to realize the regulation of residual stress generated in the additive manufacturing process of the workpiece.

公开(公告)号：US11919040B2

公开(公告)日：2024-03-05

申请号：US17364071

申请日：2021-06-30

Applicant: BEIJING INSTITUTE OF TECHNOLOGY

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

IPC: B06B1/06 ,  B06B3/00 ,  B23K20/10

CPC classification number: B06B1/0622 ,  B06B3/00 ,  B23K20/10 ,  B06B2201/72

Abstract: A control device for reducing and homogenizing welding residual stress by acoustic waves, comprising: a fixing tool having two rows of through holes; a plurality of ultrasonic transducers each having a body and a conical horn transmitting portion at a lower end of the body, wherein lower ends of the horn transmitting portions are fixedly connected with flanges, the horn transmitting portions of the ultrasonic transducers extend into respective through holes of the fixing tool to be in contact with welded parts below the fixing tool, the flanges are fixed to the fixing tool by bolts, and the two rows of through holes are arranged both sides of a welding seam of the welded parts; and a driving device for driving the ultrasonic transducers to operate. A corresponding control method is also provided. The control device can be used to control residual stress at the welding seam of steels.

公开(公告)号：US20240033825A1

公开(公告)日：2024-02-01

申请号：US18353166

申请日：2023-07-17

Applicant: BEIJING INSTITUTE OF TECHNOLOGY

Inventor： Chunguang Xu ,  Wenjun Zhang ,  Wenkai Li ,  Bo Yang

IPC: B22F10/30 ,  B22F10/28 ,  B22F12/90 ,  B33Y10/00 ,  B33Y50/02

CPC classification number: B22F10/30 ,  B22F10/28 ,  B22F12/90 ,  B33Y10/00 ,  B33Y50/02

Abstract: A multi-source self-adaptive low-stress additive manufacturing method that includes arranging one or more high-energy sound beam excitation units on an additive manufacturing platform according to a size and a structure of a metal workpiece; planning an additive path according to the size and the structure of the workpiece; fixing a substrate on a self-adaptive additive manufacturing workbench; conducting additive manufacturing of the workpiece and starting a high-energy sound beam regulation system synchronously to generate high-energy sound beam(s) that are transmitted to the workpiece according to a control sequence; acquiring position information of molten pool(s) and position information of the one or more high-energy sound beam excitation units in the additive manufacturing process; continuously monitoring a surface temperature of the workpiece; and closing the high-energy sound beam regulation system when the additive manufacturing of the workpiece is finished and the surface temperature of the metal workpiece is reduced to room temperature.

公开(公告)号：US11680858B2

公开(公告)日：2023-06-20

申请号：US17377200

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 ,  G01N29/27 ,  G01N29/04 ,  G01N29/28

CPC classification number: G01L1/255 ,  G01N29/043 ,  G01N29/07 ,  G01N29/27 ,  G01N29/28 ,  G01N2291/101

Abstract: A device and a method for ultrasonic detecting a rotating member based on magnetic fluid coupling, wherein the device comprises an ultrasonic probe, magnetic field protection rings, magnetic fluid and a magnetic fluid protection cover. The ultrasonic probe is arranged above the rotating member that is horizontally placed. Front ends of a transmitting ultrasonic transducer and a receiving ultrasonic transducer of the ultrasonic probe are provided with the magnetic field protection rings for generating magnetic fields in the magnetic field protection rings. The protective cover is sleeved on a circumferential outer side of the rotating member where a detected position is located, and the front ends of the ultrasonic probe are arranged to penetrate through the magnetic fluid protective cover. A cavity formed between the magnetic fluid protective cover and the rotating member is filled with the magnetic fluid and the magnetic fluid is a liquid mixture solution.

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.