公开(公告)号：US11897219B2

公开(公告)日：2024-02-13

申请号：US17685712

申请日：2022-03-03

Applicant: Dalian University of Technology

Inventor： Zhubin He ,  Haihui Zhu

IPC: B21D26/00 ,  B30B1/00 ,  B21D22/02 ,  B21D37/12

CPC classification number: B30B1/001 ,  B21D22/02 ,  B21D37/12

Abstract: An impact forming device and method for local small features on a metal thin-walled curved-surface part. The impact forming device includes impact forming dies, impact loading units and a forming supporting die, wherein the impact forming die is provided with an impact forming part, and the impact forming part is a convex part corresponding to a local small feature; the forming supporting die can support and fix a metal thin-walled curved-surface part without forming local small features, and the forming supporting die is provided with concave parts matched with the impact forming parts; and the impact loading unit includes a guide rail, an explosive ball and a detonating block, under the impact loading of the impact loading units, the impact forming parts can impact the metal thin-walled curved-surface part without forming local small features under the matching action of the concave parts to form the local small features.

公开(公告)号：US11459648B2

公开(公告)日：2022-10-04

申请号：US17189229

申请日：2021-03-01

Applicant: Dalian University of Technology

Inventor： Xiaobo Fan ,  Shijian Yuan ,  Zhubin He

IPC: C22F1/04 ,  C21D9/46 ,  C22C21/00

Abstract: Provided is a performance controlling method for a high-strength aluminum alloy shell during an ultra-low temperature forming process. The present disclosure greatly improves the performance of an aluminum alloy sheet by applying an ultra-low temperature. The present disclosure cools the aluminum alloy sheet to an ultra-low temperature by using an ultra-low temperature cooling medium, so as to compensate for insufficient hardening caused by insufficient deformation and avoid cracking caused by increased deformation. The present disclosure cools the sheet blank zonally according to a deformation law of a desired curved part, and controls the ultra-low temperature distribution of the sheet blank during forming so as to promote the formation of a substructure in a small-deformation zone. In this way, the present disclosure improves a subsequent age-hardening effect, and corresponding uniformity of microstructure and performance, and effectively solves the problem of non-uniformity due to uneven deformation.

公开(公告)号：US10576524B1

公开(公告)日：2020-03-03

申请号：US16537382

申请日：2019-08-09

Applicant: Dalian University of Technology ,  Harbin Institute of Technology

Inventor： Shijian Yuan ,  Zhubin He ,  Xiaobo Fan ,  Yanli Lin ,  Guofeng Wang ,  Chang Qi

IPC: B21D37/16 ,  B21D37/02 ,  B21D22/02 ,  B21D37/08 ,  C21D1/673

Abstract: The present invention provides a die capable of achieving rapid forming and quenching therein. The die includes an upper die, a blank holder and a lower die, where the upper die is composed of an internal solid die core and a thin-walled skin. Grooves in communication with each other are disposed between the internal solid die core and the thin-walled skin. In a forming stage, the grooves are not filled or filled with a heat insulating material such as a gas; and in a quenching stage, a low-temperature medium is introduced into the grooves. The die can be used to achieve rapid forming and quenching of metal materials of different types and thicknesses.

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.

公开(公告)号：US11612960B2

公开(公告)日：2023-03-28

申请号：US17864176

申请日：2022-07-13

Applicant: DALIAN UNIVERSITY OF TECHNOLOGY

Inventor： Zhubin He ,  Jiangkai Liang ,  Wei Du ,  Xinyu Hu ,  Yi Xu

IPC: B23K26/342 ,  B23K26/082 ,  B23K26/70 ,  B21B47/00 ,  B21B37/24 ,  B33Y50/02 ,  B33Y10/00 ,  B33Y40/20

Abstract: Laser additive manufacturing and a method for preparing thin-walled preforms by laser metal deposition and follow-up rolling. This can solve the problems that when the existing laser metal deposition technology prepares the thin-walled preforms, the limit width size of a molten pool at high power affects the forming wall thickness of the preforms so that it is difficult to prepare preforms with wall thickness less than 2 mm, and the problems of poor surface quality and low accuracy of preforms due to convex and concave peaks caused by the interlayer overlapping, but also can solve the problems that a laser beam with a preset trajectory cannot act on the end surfaces of the preforms due to preform deformation caused by residual stress in a printing process so that the preforms cannot be continuously formed.

公开(公告)号：US20210162482A1

公开(公告)日：2021-06-03

申请号：US17105138

申请日：2020-11-25

Applicant: DALIAN UNIVERSITY OF TECHNOLOGY

Inventor： Zhubin He ,  Jianshu Liu ,  Xiaobo Fan ,  Jiangxiang Yu

IPC: B21D37/10 ,  B21D22/02

Abstract: A method for forming a large-size curved thin-walled metal skin is disclosed, wherein the position and size characteristics of stiffeners on a curved panel is extracted; the thickness of the curved panel and the thin-walled skin after assembly is assumed to be m, and a forming surface of the punch is offset outwards along a normal line by the thickness m to obtain the characteristics of the inner surface of a female die; the number of the discrete support moulds is set to be the same as the number n of the stiffeners based on the size and distribution of the stiffeners on the curved panel; and the punch and the female die combined with the discrete support moulds are used to carry out stamping of a curved thin-walled slab to obtain a required thin-walled skin component.

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

IPC: B21D9/15 ,  B21D9/08 ,  B21D9/18

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.

公开(公告)号：US11292057B2

公开(公告)日：2022-04-05

申请号：US16863199

申请日：2020-04-30

Applicant: Dalian University of Technology

Inventor： Zhubin He ,  Yi Xu ,  Jiangkai Liang ,  Wei Du ,  Peng Lin

IPC: B22F10/00 ,  B21D26/041 ,  B21D26/049 ,  B33Y10/00 ,  B22F10/10

Abstract: The present invention discloses a method for manufacturing a thin-walled metal component by three-dimensional (3D) printing and hot gas bulging. The present invention uses 3D printing to obtain a complex thin-walled preform, which reduces a deformation during subsequent hot gas bulging. The present invention avoids local bulging thinning and cracking, undercuts at the parting during die closing, and wrinkles due to the uneven distribution of cross-sectional materials, etc. The present invention obtains a high accuracy in the form and dimension through hot gas bulging. After a desired shape is obtained by hot gas bulging, a die is closed to keep the component under high temperature and high pressure for a period of time, so that a grain and a phase of the material are transformed to form a desired microstructure.

公开(公告)号：US11413675B2

公开(公告)日：2022-08-16

申请号：US16937660

申请日：2020-07-24

Applicant: DALIAN UNIVERSITY OF TECHNOLOGY

Inventor： Zhubin He ,  Yanan Li ,  Yanli Lin ,  Xinyu Hu ,  Linwei Leng ,  Shijian Yuan

IPC: B21D26/041 ,  B21D26/045 ,  B21D26/049

Abstract: A method and device for manufacturing a large-sized thin-walled tubular part by gas-liquid internal high pressure forming (IHPF). A gas and a liquid are filled at a certain volume ratio into a thin-walled blank. The pressure of the gas-liquid mixed fluid is mainly determined by the gas pressure. During the deformation of the thin-walled blank, due to a large compression ratio of the gas, the gas-liquid pressure will not basically change with the change of the volume of a blank cavity. A support pressure on the cavity of the thin-walled blank is stable in the entire forming process. In addition, even if there is a slight leakage of the liquid or gas during the forming process, the medium pressure inside the blank will not fluctuate largely. In this way, embodiments lower the requirements for the sealing effect during the tubular part forming process.

公开(公告)号：US11229939B1

公开(公告)日：2022-01-25

申请号：US17350826

申请日：2021-06-17

Applicant: DALIAN UNIVERSITY OF TECHNOLOGY

Inventor： Zhubin He ,  Yi Xu ,  Jiangkai Liang ,  Ying Sun ,  Shijian Yuan

IPC: B21D26/027 ,  B21D37/16 ,  B21D26/053 ,  C23C10/28 ,  C23C26/00 ,  C21D9/52 ,  C22C19/03 ,  C22C14/00

Abstract: The present invention provides a method for manufacturing a curved thin-walled intermetallic compound component by winding a mandrel with metal foil strips, which comprises the following steps: designing a prefabricated blank; preparing a support mandrel; determining thicknesses and layer numbers of foil strips; determining widths of the foil strips; establishing a laying process; pretreating surfaces of the foil strips; laying A foil and B foil; carrying out bulge forming on the prefabricated blank; carrying out diffusion reaction and densification treatment on a bulged component; and carrying out subsequent treatment of a thin-walled component. The present invention can solve the problems that impurities generated in the separation process of a support mould and a laminated foil prefabricated blank influence the final performance of a part, and a single homogeneous intermetallic compound component in thickness direction has poor plasticity and toughness at room temperature.