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1.发明授权公开(公告)号：US11484991B2
公开(公告)日：2022-11-01
申请号：US16959877
申请日：2018-10-25
Applicant: South China University of Technology
Inventor： Qinxiang Xia , Jinchuan Long , Xiuquan Cheng , Yingchao Xiong , Gangfeng Xiao
Abstract: The present disclosure discloses an internal and external clamping method and device of a thin-wall tubular part during rotary processing. A plurality of support blocks of this device are spaced to form an annular structure around the flange bush; the middle portion of each support block is provided with a through hole; a support claw is provided between every two support blocks, and the side surface of the support claw is provided with the through hole; a rotary shaft penetrates through the through holes in the support claws and the support blocks; and the plurality of support claws are spaced to form a support claw ring having the annular structure.
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公开(公告)号：US12179255B2
公开(公告)日：2024-12-31
申请号：US17600121
申请日：2019-10-31
Applicant: SOUTH CHINA UNIVERSITY OF TECHNOLOGY
Inventor： Qinxiang Xia , Xiuquan Cheng , Gangfeng Xiao , Xuyang Bian
Abstract: Disclosed is a roll spinning forming device for a toothed part. The device is mounted on a machine tool body. A blank, a mandrel and a driving synchromesh gear are mounted on a machine tool spindle. A driven synchromesh gear and a roller are arranged in parallel on the spindle. The driven synchromesh gear and the roller are connected by a telescopic constant speed universal joint and rotate at a same angular speed. The driven synchromesh gear is driven by a spring mechanism in the radial direction, and the roller is driven by a servo motor assembly in the radial direction. Further disclosed is a roll spinning forming method for a toothed part, the rotating speed of the blank is maintained to be matched with the rotating speed of the roller according to a gear ratio during the movement of the roller toward the blank.
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公开(公告)号：US11358202B2
公开(公告)日：2022-06-14
申请号：US16498449
申请日：2017-11-24
Applicant: South China University of Technology
Inventor： Qinxiang Xia , Ningyuan Zhu , Xiuquan Cheng , Gangfeng Xiao
Abstract: Provided is an integrated shape/property control method for hot power spinning of a cylindrical part based on a hot processing map. The method comprises: during the process of thermoplastic forming of a difficult-to-deform metal, performing a high-temperature mechanical property test on the metal material at a temperature and a strain rate range where dynamic recrystallization occurs; constructing, based on the power dissipation during the thermoplastic forming and a judging criterion for flow instability and on a flow stress-strain relation obtained from the high-temperature mechanical property test, power dissipation maps and flow instability maps at different strains, respectively; combining the power dissipation maps with the flow instability maps to obtain a hot processing map of the material; according to a profile of a power dissipation rate factor η and the flow instability criterion, obtaining potential dangerous forming conditions met with the flow instability criterion, and safe forming conditions under which the power dissipation rate factor η is large and the thermoplastic forming is facilitated; and finally performing hot power spinning of the cylindrical part at the temperature and strain rate that facilitates the thermoplastic forming of the material according to the hot processing map.
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公开(公告)号：US20210276067A1
公开(公告)日：2021-09-09
申请号：US16498449
申请日：2017-11-24
Applicant: South China University of Technology
Inventor： Qinxiang Xia , Ningyuan Zhu , Xiuquan Cheng , Gangfeng Xiao
Abstract: Provided is an integrated shape/property control method for hot power spinning of a cylindrical part based on a hot processing map. The method comprises: during the process of thermoplastic forming of a difficult-to-deform metal, performing a high-temperature mechanical property test on the metal material at a temperature and a strain rate range where dynamic recrystallization occurs; constructing, based on the power dissipation during the thermoplastic forming and a judging criterion for flow instability and on a flow stress-strain relation obtained from the high-temperature mechanical property test, power dissipation maps and flow instability maps at different strains, respectively; combining the power dissipation maps with the flow instability maps to obtain a hot processing map of the material; according to a profile of a power dissipation rate factor η and the flow instability criterion, obtaining potential dangerous forming conditions met with the flow instability criterion, and safe forming conditions under which the power dissipation rate factor η is large and the thermoplastic forming is facilitated; and finally performing hot power spinning of the cylindrical part at the temperature and strain rate that facilitates the thermoplastic forming of the material according to the hot processing map.
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