Patents by Inventor Changhai Li

Changhai Li 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: 10919083
    Abstract: A process for manufacturing an aluminum alloy wheel includes: casting, de-flashing, soaking, spinning, thermal treatment, de-gating, X-ray and machining. During the casting, a casting mold is cooled with water, and a cast blank is produced from carrying out the casting. The de-flashing includes removing flashes of the cast blank at a rim of the cast blank with a de-flashing device. The soaking includes reheating on the cast blank that has been de-flashed. The spinning includes an adaptive spinning mold. The thermal treatment includes direct solution treatment and aging on the cast blank in a thermal treatment furnace after spinning.
    Type: Grant
    Filed: July 3, 2018
    Date of Patent: February 16, 2021
    Assignee: CITIC Dicastal CO., LTD.
    Inventors: Zuo Xu, Haiping Chang, Lijuan Zhang, Shiwen Xu, Changhai Li, Zhihua Zhu
  • Patent number: 10807160
    Abstract: The present application discloses an aluminum alloy low-pressure casting device and an aluminum alloy low-pressure casting process. A riser tube is canceled, and the pressure kettle replaces original injection of compressed air into a holding furnace, thereby reducing the consumption of compressed air, and improving the production efficiency of the low-pressure casting process. A non-return stopper is used to space the low-pressure casting and the holding furnace, and molten aluminum alloy can be added into the holding furnace in real time without interrupting the low-pressure casting process, so that rejects affected by temperature field changes due to interrupt of the continuous casting process can be reduced, and the yield of the casting process is improved.
    Type: Grant
    Filed: July 31, 2018
    Date of Patent: October 20, 2020
    Assignee: CITIC DICASTAL CO., LTD
    Inventors: Dexi Du, Changhai Li
  • Publication number: 20200290396
    Abstract: An automobile hub with a hollow rim includes a wheel disc and the rim with at least one hollow cavity, in which the rim includes at least two mutually nested rings and an axial end cap at the same ends of the at least two rings, and the hollow cavity consists of the rings and the axial end cap. The outer side of one end of the wheel disc includes axial rim mounting grooves, and the rim is inserted into the rim mounting grooves and fixed to the wheel disc through the end without the axial end cap. By employing the automobile hub with the hollow rim, the hub assembling method, and the automobile having the hub, the weight of the hub can be further reduced, and the hub has sufficient strength.
    Type: Application
    Filed: August 23, 2019
    Publication date: September 17, 2020
    Applicant: CITIC Dicastal CO., LTD.
    Inventors: Chuan CHENG, Changhai LI, Xu WANG, Hongbiao LI, Lin ZHU, Zhen LI, Yule ZHOU
  • Patent number: 10758973
    Abstract: Disclosed is an aluminum alloy wheel squeeze casting process and an aluminum alloy wheel squeeze casting device. Molten aluminum is injected into a mold cavity from the bottom by adopting a U-shaped pipe, so that the filling is stable and the quality problem of the pore defect of a squeeze cast rim is solved; the squeeze deformation effect of the rim is strengthened using a mold locking ring; and through a secondary pressurization process for the center of the aluminum wheel, the internal dendritic spacing of the aluminum wheel casting is reduced, the yield strength and the elongation in the material mechanical properties of the casting are improved, and a necessary technical foundation is provided for overall weight reduction of the aluminum wheel.
    Type: Grant
    Filed: August 8, 2018
    Date of Patent: September 1, 2020
    Assignee: CITIC DICASTAL CO., LTD
    Inventors: Dexi Du, Changhai Li, Yongwang Zhao
  • Publication number: 20200254812
    Abstract: An automobile hub of a multilayer rim includes a wheel disc and a rim that is composed of at least two layers of metal rings by nesting, and a gap is preset between two adjacent metal rings; an outer side of one end of the wheel disc includes axial rim mounting grooves, and one end of the rim is inserted into the rim mounting grooves to fix the rim to the wheel disc.
    Type: Application
    Filed: August 26, 2019
    Publication date: August 13, 2020
    Applicant: CITIC Dicastal CO., LTD.
    Inventors: Chuan CHENG, Changhai LI, Xu WANG, Hongbiao LI, Zhen LI, Yule ZHOU, Zenglei HE
  • Patent number: 10675675
    Abstract: A water-cooled mold for low-pressure casting of an aluminum alloy wheel includes an upper mold, a lower mold and a side mold which surround a cavity of aluminum alloy, in which a cooling insert is embedded into a side mold frame of the side mold; an upper parting surface, a lower parting surface and a side parting surface of the cooling insert are respectively in contact parting with the side mold frame, the side parting surface includes a front zone and a rear straight zone, and a gap of 1.5-2.5 mm is formed between the rear straight zone and the side mold frame.
    Type: Grant
    Filed: November 29, 2018
    Date of Patent: June 9, 2020
    Assignee: CITIC Dicastal CO., LTD.
    Inventors: Lin Zhu, Changhai Li, Hongbiao Li, Baojun Shi
  • Patent number: 10654099
    Abstract: A mold for reducing defects in low pressure casting of an aluminum alloy wheel includes a top mold, a side mold and a bottom mold, wherein the top mold is arranged above the bottom mold to mold a back cavity of a wheel, the bottom mold is arranged below the top mold to mold a front wheel disc of the wheel, the side mold is arranged on the side of the top mold and the bottom mold, and the top mold, the side mold and the bottom mold collectively surround a casting cavity of the aluminum alloy wheel, wherein the upper surface of the bottom mold includes a recessed portion configured to form a spoke and a boss portion configured to form a window and wherein the boss portion configured to form the window includes cooling ducts.
    Type: Grant
    Filed: March 22, 2019
    Date of Patent: May 19, 2020
    Assignee: CITIC Dicastal Co., Ltd.
    Inventors: Kaiqing Wang, Xianyi Xu, Changhai Li
  • Publication number: 20200147742
    Abstract: A wheel deburring machine is capable of meeting the demand for mixed-line high-precision clamping in a wheel burr brushing process when being used and is ideal in effect, high in efficiency, safe and reliable in working and high in automation degree so as to be particularly suitable for mass production on a production line.
    Type: Application
    Filed: July 4, 2019
    Publication date: May 14, 2020
    Applicant: CITIC Dicastal CO., LTD.
    Inventors: Yao ZHENG, Jiandong GUO, Lei YANG, Xuesong WANG, Xiaoguang HUANG, Weidong LIU, Zhihua ZHU, Changhai LI
  • Patent number: 10576534
    Abstract: A mold for improving solidification speed of an aluminum alloy cast hot section includes a top mold, a side mold and a lower mold, the top mold being arranged at top and configured to complete a back cavity of a wheel, the bottom mold being arranged below the top mold and configured to complete shaping of a front wheel disc of the wheel, the side mold being arranged on side of the top mold and bottom mold, the top mold, side mold and bottom mold jointly surrounding a cast cavity of the aluminum alloy wheel, the center of the top mold includes a step hole through which a shunt cone is mounted, the shunt cone is connected with the top mold by bolts; the upper part of the shunt cone is assembled with the center hole of the top mold of the mold, the two are in zero clearance fit.
    Type: Grant
    Filed: December 14, 2018
    Date of Patent: March 3, 2020
    Assignee: CITIC Dicastal CO., LTD.
    Inventors: Kaiqing Wang, Xianyi Xu, Changhai Li
  • Patent number: 10549339
    Abstract: Disclosed in the present application is a low-pressure casting mold for an aluminum wheel. V-shaped grooves are formed in the cavity surface of a side mold, a cavity is formed in the back cavity of the side mold, a cooling duct is arranged in the cavity of the side mold, and a main air pipe is perpendicular to an annular branch; the annular branch is concentric with a wheel casting, and air pipes are 5-10 mm away from the bottom surface of the cavity; the two ends of the annular branch are welded with plugs; air outlet holes are arranged on the annular branch, and the holes are perpendicular to the bottom surface of the cavity; the diameters of the air outlet holes are 3 mm, and the holes are uniformly distributed at intervals of 10-15 mm in the circumferential direction.
    Type: Grant
    Filed: July 31, 2018
    Date of Patent: February 4, 2020
    Assignee: CITIC DICASTAL CO., LTD
    Inventors: Kaiqing Wang, Song Sheng, Yingfeng Wang, Xianyi Xu, Changhai Li
  • Patent number: 10499462
    Abstract: The present application discloses an on-line induction heating device for a wheel blank, consisting of a frame, a servo motor, guide posts I, guide sleeves I, a lower fixed plate, a lifting top plate, a bearing seat, a jacking cylinder, a piston connecting rod, a top cone, reset springs, radial positioning blocks, upper fixed plates, induction heating cylinders, connecting rods, double-head fastening nuts, fixed slide rails, mounting plates, outer protective jackets, induction coils, a displacement sensor I, a compression cylinder, a guide sleeve II, a guide post II, a gland, pressure sensors, asbestos, a displacement sensor II, water inlet pipes, water outlet pipes, a roller bed, transverse sliding tables, positioning cylinders, a supporting plate and lifting cylinders.
    Type: Grant
    Filed: September 1, 2017
    Date of Patent: December 3, 2019
    Assignee: CITIC DICASTAL CO., LTD
    Inventors: Haiping Chang, Zhixue Wang, Jin Zhang, Rui Li, Dawei Xu, Bowen Xue, Changhai Li
  • Patent number: 10494699
    Abstract: The invention provides a method of refining aluminum alloy, which is characterized in that aluminum-based nanometer quasicrystal alloy is used as an aluminum alloy refiner to refine the aluminum alloy; the aluminum-based nanometer quasicrystal alloy does not comprise Si, Fe or Cr; the aluminum-based nanometer quasicrystal alloy consists of (1) Al; (2) Mn and (3) La and/or Ce. The refiner selected in the invention is rare earth-containing alloy which has a strong refinement ability on the aluminum alloy, and is nanometer quasicrystal; after adding the rare earth-containing alloy to melt, the element distribution of the rare earth-containing alloy is more uniform than that of traditional alloy; and nanometer quasicrystal particles substantially increase the number of heterogeneous nucleation particles and improve the grain refinement effect of the aluminum alloy.
    Type: Grant
    Filed: March 16, 2016
    Date of Patent: December 3, 2019
    Assignees: CITIC DICASTAL CO., LTD., Hebei University of Technology
    Inventors: Lisheng Wang, Yongning Wang, Zhihua Zhu, Chunhai Liu, Changhai Li, Lateng A, Zhendong Zhang, Bangwei Bai, Weimin Zhao, Zhifeng Wang
  • Patent number: 10456822
    Abstract: A tandem water spot cooling device for a top die. The device includes a spot cooling device main body, a lower sealing plate, an outer-ring circular track, an inner-ring serpentine passage, outer-ring flow dividing baffles, inner-ring flow dividing baffles, outer-ring through holes, inner-ring through holes, bolt hole reservation positions, stripper rod reservation positions, and water inlet and outlet connection through holes.
    Type: Grant
    Filed: April 10, 2017
    Date of Patent: October 29, 2019
    Assignee: CITIC Dicastal CO., LTD
    Inventors: Lin Zhu, Changhai Li, Hongbiao Li, Yong Li
  • Publication number: 20190321878
    Abstract: A mold for reducing defects in low pressure casting of an aluminum alloy wheel includes a top mold, a side mold and a bottom mold, wherein the top mold is arranged above the bottom mold to mold a back cavity of a wheel, the bottom mold is arranged below the top mold to mold a front wheel disc of the wheel, the side mold is arranged on the side of the top mold and the bottom mold, and the top mold, the side mold and the bottom mold collectively surround a casting cavity of the aluminum alloy wheel, wherein the upper surface of the bottom mold includes a recessed portion configured to form a spoke and a boss portion configured to form a window and wherein the boss portion configured to form the window includes cooling ducts.
    Type: Application
    Filed: March 22, 2019
    Publication date: October 24, 2019
    Inventors: Kaiqing Wang, Xianyi Xu, Changhai Li
  • Publication number: 20190299706
    Abstract: A wheel and a rim with a weight reduction inner flange are provided. The rim includes an inner flange, a middle portion and an outer flange which are all annular and connected end to end to form an annular rim, in which the inner flange or the outer flange includes multiple groups of edge weight reduction sockets arranged side by side on one side of the inner cavity of a hub, and multiple groups of inner weight reduction sockets arranged side by side are provided inside the edge weight reduction sockets on the rim; a group of edge weight reduction sockets includes a first edge weight reduction socket and a second edge weight reduction socket at the edge of the inner flange or the outer flange, and the first edge weight reduction socket is in the shape of a right-angled triangle having round angles.
    Type: Application
    Filed: November 29, 2018
    Publication date: October 3, 2019
    Inventors: Zhen LI, Xu WANG, Kaiqing WANG, Yule ZHOU, Chuan CHENG, Changhai LI, Tiefeng HU, Hui CHI
  • Publication number: 20190299276
    Abstract: Disclosed in the present application is a low-pressure casting mold for an aluminum wheel. V-shaped grooves are formed in the cavity surface of a side mold, a cavity is formed in the back cavity of the side mold, a cooling duct is arranged in the cavity of the side mold, and a main air pipe is perpendicular to an annular branch; the annular branch is concentric with a wheel casting, and air pipes are 5-10 mm away from the bottom surface of the cavity; the two ends of the annular branch are welded with plugs; air outlet holes are arranged on the annular branch, and the holes are perpendicular to the bottom surface of the cavity; the diameters of the air outlet holes are 3 mm, and the holes are uniformly distributed at intervals of 10-15 mm in the circumferential direction.
    Type: Application
    Filed: July 31, 2018
    Publication date: October 3, 2019
    Applicant: CITIC Dicastal CO., LTD
    Inventors: Kaiqing WANG, Song SHENG, Yingfeng WANG, Xianyi XU, Changhai LI
  • Publication number: 20190291173
    Abstract: A water-cooled mold for low-pressure casting of an aluminum alloy wheel includes an upper mold, a lower mold and a side mold which surround a cavity of aluminum alloy, in which a cooling insert is embedded into a side mold frame of the side mold; an upper parting surface, a lower parting surface and a side parting surface of the cooling insert are respectively in contact parting with the side mold frame, the side parting surface includes a front zone and a rear straight zone, and a gap of 1.5-2.5 mm is formed between the rear straight zone and the side mold frame.
    Type: Application
    Filed: November 29, 2018
    Publication date: September 26, 2019
    Inventors: Lin ZHU, Changhai LI, Hongbiao Li, Baojun Shi
  • Publication number: 20190291174
    Abstract: A mold for improving solidification speed of an aluminum alloy cast hot section includes a top mold, a side mold and a lower mold, the top mold being arranged at top and configured to complete a back cavity of a wheel, the bottom mold being arranged below the top mold and configured to complete shaping of a front wheel disc of the wheel, the side mold being arranged on side of the top mold and bottom mold, the top mold, side mold and bottom mold jointly surrounding a cast cavity of the aluminum alloy wheel, the center of the top mold includes a step hole through which a shunt cone is mounted, the shunt cone is connected with the top mold by bolts; the upper part of the shunt cone is assembled with the center hole of the top mold of the mold, the two are in zero clearance fit.
    Type: Application
    Filed: December 14, 2018
    Publication date: September 26, 2019
    Inventors: Kaiqing WANG, Xianyi Xu, Changhai Li
  • Publication number: 20190283122
    Abstract: The present application relates to a low-pressure casting multi-sprue process and device for an aluminum alloy wheel. A multi-sprue casting method is adopted, and a plurality of sprues are arranged at the end of the inner flange of a wheel, so that molten aluminum enters at the inner flange first, then enters from a center sprue after a mold cavity at the rim is full of the molten aluminum. The mold assembly is pressurized and cooled after the mold cavity is full of the molten aluminum. During cooling, starting from the outer flange of the wheel filled with the molten aluminum last, side mold ring water coolers are started.
    Type: Application
    Filed: August 8, 2018
    Publication date: September 19, 2019
    Applicant: CITIC Dicastal CO., LTD
    Inventors: Dexi DU, Changhai LI
  • Publication number: 20190283121
    Abstract: Disclosed is an aluminum alloy wheel squeeze casting process and an aluminum alloy wheel squeeze casting device. Molten aluminum is injected into a mold cavity from the bottom by adopting a U-shaped pipe, so that the filling is stable and the quality problem of the pore defect of a squeeze cast rim is solved; the squeeze deformation effect of the rim is strengthened using a mold locking ring; and through a secondary pressurization process for the center of the aluminum wheel, the internal dendritic spacing of the aluminum wheel casting is reduced, the yield strength and the elongation in the material mechanical properties of the casting are improved, and a necessary technical foundation is provided for overall weight reduction of the aluminum wheel.
    Type: Application
    Filed: August 8, 2018
    Publication date: September 19, 2019
    Applicant: CITIC Dicastal CO., LTD
    Inventors: Dexi DU, Changhai LI, Yongwang ZHAO