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公开(公告)号：US11413672B2
公开(公告)日：2022-08-16
申请号：US17056878
申请日：2019-11-20
Applicant: DALIAN UNIVERSITY OF TECHNOLOGY
Inventor： Shijian Yuan , Kailun Zheng , Zhubin He
Abstract: The present disclosure discloses an apparatus and a method for forming a large-scale thin-walled ring shell by hot-press bending with internal gas pressure. The method comprises: welding a first head and a second head to the pipe; arranging a first electrode and a second electrode at the two ends of the pipe; charging compressed gas to the heated sealed pipe assembly; placing the sealed pipe assembly between the convex part of the first die and the concave part of the second die, controlling the temperatures of the first and second dies to perform press bending; increasing the gas pressure in the bent sealed pipe assembly, to attach the bent sealed pipe assembly to the die cavity profile; discharging the compressed gas, cutting the first head, second head and extra material to obtain a formed ring shell segment; welding formed ring shell segments to obtain a large-scale thin-walled ring shell.
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公开(公告)号：US12285793B2
公开(公告)日：2025-04-29
申请号：US18622974
申请日：2024-03-31
Inventor： Kailun Zheng , Dechong Li , Lihua Du , Yujie Han
Abstract: A forming device and a forming method for a part with a regular cross-section are provided, and relates to the technical field of metal member forming and manufacturing. A part to be formed is heated by a part heating temperature control assembly to obtain required microstructure evolution, so that the forming performance is improved. A temperature control die assembly can be heated by setting die heating assemblies, so that hot stamping, die quenching and stress relaxation can be carried out. The internal stress state of the part is controlled by an axial force control assembly.
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Patent Agency Ranking
公开(公告)号：US11813695B2
公开(公告)日：2023-11-14
申请号：US16705416
申请日：2019-12-06
Applicant: DALIAN UNIVERSITY OF TECHNOLOGY
Inventor： Zhubin He , Shijian Yuan , Kailun Zheng , Wei Du , Jianshu Liu
IPC: B23K26/24 , B23K20/12 , B23K37/00 , B23K101/18
CPC classification number: B23K26/24 , B23K20/122 , B23K37/003 , B23K2101/185
Abstract: A method for forming a large-diameter special-shaped cross section thin-wall tubular part. A tailor welded barrel blank is adopted as an original blank for forming of the large-diameter special-shaped cross section thin-wall tubular part. After a desired shape is formed, the original weld joint is removed and butt joint tailor welding is performed on the tubular part again. Since the tailor weld joint of the original barrel blank is removed from the final part, there is no need to consider the consistency or coordination of the microstructure of the weld joint and the base metal during the forming process and the subsequent thermal treatment process.
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公开(公告)号：US12116658B2
公开(公告)日：2024-10-15
申请号：US17862769
申请日：2022-07-12
Applicant: Dalian University of Technology
Inventor： Kailun Zheng , Zongren He
CPC classification number: C22F1/04 , B21D22/022 , C22F1/002
Abstract: Solution heat treatment is performed on a blank to dissolve initial coarse secondary phases, to obtain a uniform solid solution microstructure. The blank subjected to the solution heat treatment is transferred into the temperature-controllable forming die to be stamped and quenched. During forming, the temperature and the pressure are further maintained for a period of time. The temperature of the forming die is adjusted to a second-step aging temperature for the second-step aging treatment. In a two-step aging temperature range, stress relaxation occurs while strengthening precipitates are rapidly precipitated, thereby improving strength and dimensional accuracy of the formed part. On the premise of ensuring quality of the formed part, employing stepped aging treatment shortens the aging cycle and reduces energy consumption in the production and manufacturing process.
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5.发明公开公开(公告)号：US20230203633A1
公开(公告)日：2023-06-29
申请号：US17862769
申请日：2022-07-12
Applicant: Dalian University of Technology
Inventor： Kailun Zheng , Zongren He
CPC classification number: C22F1/04 , B21D22/022 , C22F1/002
Abstract: Solution heat treatment is performed on a blank to dissolve initial coarse secondary phases, to obtain a uniform solid solution microstructure. The blank subjected to the solution heat treatment is transferred into the temperature-controllable forming die to be stamped and quenched. During forming, the temperature and the pressure are further maintained for a period of time. The temperature of the forming die is adjusted to a second-step aging temperature for the second-step aging treatment. In a two-step aging temperature range, stress relaxation occurs while strengthening precipitates are rapidly precipitated, thereby improving strength and dimensional accuracy of the formed part. On the premise of ensuring quality of the formed part, employing stepped aging treatment shortens the aging cycle and reduces energy consumption in the production and manufacturing process..
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公开(公告)号：US11207732B2
公开(公告)日：2021-12-28
申请号：US16938648
申请日：2020-07-24
Applicant: DALIAN UNIVERSITY OF TECHNOLOGY
Inventor： Zhubin He , Jiangkai Liang , Yi Xu , Wei Du , Yanli Lin , Kailun Zheng , Peng Lin , Gang Liu , Shijian Yuan
Abstract: An integrated method for manufacturing a high-temperature resistant thin-walled component by preforming by laying a metal foil strip. The integrated manufacturing method includes: designing a preform, preparing a support die, determining a thickness of a foil strip, determining a width of the foil strip, developing a laying process, laying an A foil strip and a B foil strip, obtaining an AB laminated preform, bulging the preform, performing a reactive synthesis and a densification process of a bulged component, and performing a subsequent treatment of the thin-walled component. Various embodiments obtain an integral thin-walled preform with a complex structure, a uniform wall thickness and a shape close to the final part by continuously laying a metal foil strip with an appropriate width.
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公开(公告)号：US20210213528A1
公开(公告)日：2021-07-15
申请号：US16938648
申请日：2020-07-24
Applicant: DALIAN UNIVERSITY OF TECHNOLOGY
Inventor： Zhubin He , Jiangkai Liang , Yi Xu , Wei Du , Yanli Lin , Kailun Zheng , Peng Lin , Gang Liu , Shijian Yuan
Abstract: The present invention discloses an integrated method for manufacturing a high-temperature resistant thin-walled component by preforming by laying a metal foil strip. The integrated manufacturing method includes: designing a preform, preparing a support die, determining a thickness of a foil strip, determining a width of the foil strip, developing a laying process, laying an A foil strip and a B foil strip, obtaining an AB laminated preform, bulging the preform, performing a reactive synthesis and a densification process of a bulged component, and performing a subsequent treatment of the thin-walled component. The present invention obtains an integral thin-walled preform with a complex structure, a uniform wall thickness and a shape close to the final part by continuously laying a metal foil strip with an appropriate width. The present invention does not need to weld the thin-walled preform, and thus solves the problem of weak comprehensive performance of a weld zone in the conventional method of preparing, rolling and welding a laminated sheet into a cylinder. In addition, the present invention reduces a subsequent bulging deformation, avoiding local bulging, thinning and cracking, undercuts at the parting during die closing, and wrinkles due to uneven distribution of materials in each zone.
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