Patents by Inventor Shijian YUAN

Shijian YUAN has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 11932915
    Abstract: The present invention provides a method for forming an aluminum alloy thin-walled curved part by ultra-low temperature gradient drawing. This method includes: placing the aluminum alloy sheet on a die, and closing a blank holder to hold the aluminum alloy sheet in a flange zone; filling a cavity of a die with an ultra-low temperature medium to cool a die cavity zone of the aluminum alloy sheet to a set low temperature, and forming an ultra-low temperature gradient in which the temperature of the die cavity zone is lower than the temperature in the flange zone; applying a set blank holder force to the blank holder, and controlling a punch to move downwards to form a deep-cavity thin-walled curved part; and controlling the punch to move upwards, opening the blank holder, and taking out the formed deep-cavity thin-walled curved part.
    Type: Grant
    Filed: February 19, 2021
    Date of Patent: March 19, 2024
    Assignee: Dalian University of Technology
    Inventors: Shijian Yuan, Xiaobo Fan
  • Publication number: 20240068793
    Abstract: A method for measuring an r-value of a tube in a circumferential direction: determine a size of an annular sample, and cutting the sample from a to-be-measured tube; making speckles or circular grids on an outer surface of the sample; sleeving the annular sample in a middle of an outside of a ring segmented rigid die; filling a liquid bag with a fluid medium and controlling an internal pressure, and driving the ring segmented rigid die to move outward uniformly in a radial direction using a uniformly distributed load generated by pressurizing the liquid bag, so as to cause equal diameter bulging of the annular sample; measuring strain in width and circumferential directions in a speckle or circular grid region on the annular sample; and determining the plastic strain ratio of the tube in the circumferential direction according to the strain in the width and circumferential directions.
    Type: Application
    Filed: February 13, 2023
    Publication date: February 29, 2024
    Inventors: Xiaolei Cui, Shijian Yuan
  • Patent number: 11813695
    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.
    Type: Grant
    Filed: December 6, 2019
    Date of Patent: November 14, 2023
    Assignee: DALIAN UNIVERSITY OF TECHNOLOGY
    Inventors: Zhubin He, Shijian Yuan, Kailun Zheng, Wei Du, Jianshu Liu
  • Patent number: 11724298
    Abstract: A forming method of a nickel aluminum (NiAl) alloy tubular part with micro flow channels including preparing a laminated tube blank. A step of fixing aluminum wires to an outer surface of the laminated tube blank to prepare a middle tube blank. A step of winding a nickel (Ni) flexible substrate and an Al flexible substrate on an outer surface of the middle tube blank to prepare a composite tube blank. A step of carrying out hot gas forming on the composite tube blank to prepare a composite tubular part. A step of carrying out in-mold first-stage reaction synthesis to make the Ni flexible substrate chemically react with the aluminum (Al) flexible substrate. A step of carrying out in-mold second-stage reaction synthesis to melt all the aluminum wires. A step of carrying out hot isostatic pressing treatment to prepare the NiAl alloy tubular part with the micro flow channels.
    Type: Grant
    Filed: July 14, 2022
    Date of Patent: August 15, 2023
    Assignee: DALIAN UNIVERSITY OF TECHNOLOGY
    Inventors: Ying Sun, Shijian Yuan
  • Publication number: 20230182188
    Abstract: An overlapping and progressive forming method for a high-performance multi-element NiAl-based alloy tubular part, including: winding continuously flexible substrates of Ni and Al, and alloying coating continuously or selectively along a width direction or a rolling direction to obtain coated flexible substrates; winding continuously the coated flexible substrates on an outer surface of a core roller according to a sequence of Ni above and Al below to form a Ni/Al laminated structure having a plurality of layers with an outermost layer being a Ni layer, and consolidating with ultrasonic with assistance of a pulse current to combine the continuously wound flexible substrates into a laminated tube blank; and placing the laminated tube blank into a mold, applying a pulse current to both ends of the laminated tube blank for hot fluid high-pressure forming, and synthesizing in-situ to prepare the tubular part with assistance of the pulse current.
    Type: Application
    Filed: April 20, 2022
    Publication date: June 15, 2023
    Applicant: Dalian University of Technology
    Inventors: Shijian Yuan, Ying Sun
  • Publication number: 20230173567
    Abstract: Disclosed are an apparatus and a method for deep drawing of large-sized thin-wall curved surface parts with servo reverse bulging, which pertain to the technical field of drawing of a thin-wall curved surface part. The apparatus includes a forming die, a jacking unit, and a power unit, wherein the forming die includes an upper die, a lower die, and a blank holder. The upper die and the blank holder are connected to a press machine, the blank holder is disposed above the lower die, and a blank to be drawn is placed between the lower die and the blank holder; the jacking unit is disposed inside the lower die and adapted to move along a moving direction of the upper die, enabling the blank to be drawn to deform by with reverse bulging. The method can inhibit defects of wrinkling and cracking in drawing processes effectively.
    Type: Application
    Filed: July 23, 2021
    Publication date: June 8, 2023
    Applicant: Harbin Institute of Technology
    Inventors: Shijian Yuan, Wei Liu
  • Patent number: 11660653
    Abstract: The present disclosure discloses an ultra-low pressure liquid filling forming system for a special-shaped component, including a control system, a supercharger, a driving device, a preforming unit, and a final forming unit.
    Type: Grant
    Filed: June 4, 2021
    Date of Patent: May 30, 2023
    Assignee: HARBIN INSTITUTE OF TECHNOLOGY
    Inventors: Cong Han, Shijian Yuan, Xiaolei Cui
  • Publication number: 20230084149
    Abstract: A forming method of a deep cavity thin-walled metal component with extremely small fillet radius is provided. In the forming method of a deep cavity thin-walled metal component with extremely small fillet radius, a global cavity is formed by deep drawing by means of a rigid die, an extremely small fillet is formed by means of a extrusion/pushing die, so that the deep drawing process is independent of the extremely small fillet forming process, and the problems of wrinkling, cracking and the like in the process of forming the two simultaneously are avoided. Thus, the problem that the extremely small fillet is difficult or impossible to form can be solved.
    Type: Application
    Filed: December 15, 2021
    Publication date: March 16, 2023
    Inventors: Haihui ZHU, Hang YUAN, Zhubin HE, Shijian YUAN
  • Patent number: 11577297
    Abstract: An accurate springback compensation method for sheet hydroforming component based on liquid volume control is related to a springback compensation method for curved surface part hydroformed with liquid as a punch during deep drawing process. According to the difference between a theoretical volume and a post-springback volume of a target part, an elastic deformation of the die is induced by liquid pressure, the die deformation amount is controlled to be equal to the springback amount. The accurate springback compensation control of a curved surface part is realized to overcome the problems of thickness or mechanical properties variations for different batches of sheets, and the manufacture error of the mould is considered to meet the design requirements. The liquid volume compensation is on-line and in-situ performed without mould re-machining. The advantages is good precision, simple process, high efficiency, short cycle and low cost.
    Type: Grant
    Filed: November 29, 2018
    Date of Patent: February 14, 2023
    Inventors: Shijian Yuan, Wei Liu
  • Patent number: 11571731
    Abstract: The present invention discloses a method for ultra-low temperature forming an ultra-thin curved part of a high-strength aluminum alloy. The method includes the following steps: step 1: selecting a cladding with a suitable thickness according to a wrinkle limit of a sheet; step 2: stacking the sheet and the cladding, then putting into a die, and closing a blank holder; step 3: filling a cavity of a female die with an ultra-low temperature medium to cool the sheet to below ?160° C.; step 4: applying a set blank holding force by the blank holder, and enabling a male die to go down to form a thin-walled curved part; and step 5: opening the die and taking out the formed thin-walled curved part. The present invention utilizes the favorable formability of the high-strength aluminum alloy at the ultra-low temperature and the instability resistance of the thick sheet.
    Type: Grant
    Filed: August 21, 2020
    Date of Patent: February 7, 2023
    Assignee: DALIAN UNIVERSITY OF TECHNOLOGY
    Inventors: Shijian Yuan, Xiaobo Fan
  • Patent number: 11459648
    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.
    Type: Grant
    Filed: March 1, 2021
    Date of Patent: October 4, 2022
    Assignee: Dalian University of Technology
    Inventors: Xiaobo Fan, Shijian Yuan, Zhubin He
  • Patent number: 11440076
    Abstract: The present disclosure provides a device for super cryogenic forming of a metal thin-walled curved surface part, including a super cryogenic medium conveying and pressurizing unit, a press, a die unit and a control system. A blank holder cylinder, a blank holder slide, a deep drawing cylinder and a deep drawing slide are disposed on the press. The die unit includes a male die, a blank holder and a female die. The super cryogenic medium conveying and pressurizing unit includes an autoboosting cryogenic container. A cryogenic channel in the blank holder, a cryogenic channel in the female die and a cavity of the female die are communicated with an outlet of the autoboosting cryogenic container by cryogenic pipes, respectively. A cryogenic pump is disposed on the cryogenic pipe between the cavity of the female die and the autoboosting cryogenic container.
    Type: Grant
    Filed: September 14, 2021
    Date of Patent: September 13, 2022
    Inventors: Shijian Yuan, Xiaobo Fan
  • Patent number: 11413672
    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.
    Type: Grant
    Filed: November 20, 2019
    Date of Patent: August 16, 2022
    Assignee: DALIAN UNIVERSITY OF TECHNOLOGY
    Inventors: Shijian Yuan, Kailun Zheng, Zhubin He
  • Patent number: 11413675
    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.
    Type: Grant
    Filed: July 24, 2020
    Date of Patent: August 16, 2022
    Assignee: DALIAN UNIVERSITY OF TECHNOLOGY
    Inventors: Zhubin He, Yanan Li, Yanli Lin, Xinyu Hu, Linwei Leng, Shijian Yuan
  • Publication number: 20220161308
    Abstract: Disclosed is an ultra-low temperature medium pressure forming method for complex curved-shaped components. The method includes steps of distributing a blank by die closing preforming and forming the complex curved-shaped components by ultra-low temperature medium pressurization, comprising: placing a plate on a female die and tightly pressing the plate by a blank holder; driving a male die to move downwards to make the plate distribute the blank in advance in a large-area mode, thus forming a prefabricated plate blank; filling a cavity with an ultra-low temperature medium to make the prefabricated plate blank be gradually attached to a molded surface of a female die cavity under the pressure action of the ultra-low temperature medium, and thereby forming the complex curved-shaped component; and removing the male die blank holder and taking out the formed complex curved-shaped component.
    Type: Application
    Filed: November 26, 2021
    Publication date: May 26, 2022
    Inventors: Xiaobo FAN, Shijian YUAN
  • Publication number: 20220080488
    Abstract: The present disclosure provides a device for super cryogenic forming of a metal thin-walled curved surface part, including a super cryogenic medium conveying and pressurizing unit, a press, a die unit and a control system. A blank holder cylinder, a blank holder slide, a deep drawing cylinder and a deep drawing slide are disposed on the press. The die unit includes a male die, a blank holder and a female die. The super cryogenic medium conveying and pressurizing unit includes an autoboosting cryogenic container. A cryogenic channel in the blank holder, a cryogenic channel in the female die and a cavity of the female die are communicated with an outlet of the autoboosting cryogenic container by cryogenic pipes, respectively. A cryogenic pump is disposed on the cryogenic pipe between the cavity of the female die and the autoboosting cryogenic container.
    Type: Application
    Filed: September 14, 2021
    Publication date: March 17, 2022
    Applicant: Dalian University of Technology
    Inventors: Shijian Yuan, Xiaobo Fan
  • Patent number: 11260444
    Abstract: The present invention discloses a forming device for a large thin-walled part with a curved surface, which includes a punch, a blank holder, a die, a lower die plate, a first annular sleeve and second annular sleeves. The first annular sleeve is connected with first driving oil cylinders. An inner diameter of the die is greater than an outer diameter of the punch. The first annular sleeve is arranged in a gap between the punch and the die. The second annular sleeve is arranged at the bottom of the punch. The first annular sleeve is arranged outside the second annular sleeve. The second annular sleeve is connected with second driving oil cylinders. The first driving oil cylinders and the second driving oil cylinders are connected with a hydraulic system.
    Type: Grant
    Filed: January 15, 2020
    Date of Patent: March 1, 2022
    Assignee: HARBIN INSTITUTE OF TECHNOLOGY
    Inventors: Yongchao Xu, Shijian Yuan
  • Publication number: 20220056561
    Abstract: The present invention discloses a method for ultra-low temperature forming an ultra-thin curved part of a high-strength aluminum alloy. The method includes the following steps: step 1: selecting a cladding with a suitable thickness according to a wrinkle limit of a sheet; step 2: stacking the sheet and the cladding, then putting into a die, and closing a blank holder; step 3: filling a cavity of a female die with an ultra-low temperature medium to cool the sheet to below ?160° C.; step 4: applying a set blank holding force by the blank holder, and enabling a male die to go down to form a thin-walled curved part; and step 5: opening the die and taking out the formed thin-walled curved part. The present invention utilizes the favorable formability of the high-strength aluminum alloy at the ultra-low temperature and the instability resistance of the thick sheet.
    Type: Application
    Filed: August 21, 2020
    Publication date: February 24, 2022
    Inventors: SHIJIAN YUAN, XIAOBO FAN
  • Publication number: 20220055086
    Abstract: The present disclosure discloses an ultra-low pressure liquid filling forming system for a special-shaped component, including a control system, a supercharger, a driving device, a preforming unit, and a final forming unit.
    Type: Application
    Filed: June 4, 2021
    Publication date: February 24, 2022
    Inventors: Cong HAN, Shijian YUAN, Xiaolei CUI
  • Publication number: 20220048090
    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.
    Type: Application
    Filed: June 17, 2021
    Publication date: February 17, 2022
    Inventors: Zhubin HE, Yi XU, Jiangkai LIANG, Ying SUN, Shijian YUAN