Patents by Inventor Shujun Chen

Shujun Chen 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: 11897049
    Abstract: The invention provides a retractable friction stir welding spindle, aims at the deficiencies and defects of the existing friction stir welding spindle technology, that is, when the welding is finished, the stirring needle leaves a keyhole at the end of the weld seam, which affects the forming performance of the workpiece, the overall structure design of the spindle is complicated with many transmission chains and low reliability which is difficult to realize modularization. The retractable friction stir welding spindle includes an electric spindle system and a retracting mechanism. The electric spindle system includes stirring shaft shoulder, hilt, front end cover, hollow spindle, motorized spindle shell, motor rotor, motor stator, tail end cover, etc. The retracting mechanism includes stirring needle, connecting ball head and electric cylinder. The invention has the advantages of simple structure and can be mainly divided into two modules to improve reliability and integrity.
    Type: Grant
    Filed: April 10, 2023
    Date of Patent: February 13, 2024
    Assignee: BEIJING UNIVERSITY OF TECHNOLOGY
    Inventors: Shujun Chen, Bo Cheng, Xinhong Xie, Zirui Cao
  • Publication number: 20230286049
    Abstract: A device and a method for controlling a size of a molten pool in a wire and arc additive manufacturing process are provided. The device includes additive manufacturing equipment, a connecting device, bilateral gas flow devices and a CCD camera. By adjusting the connecting device, the bilateral gas flow devices and a welding gun have proper relative positions. The CCD camera is clamped on a rear side of the welding gun and matched with a proper optical filter to detect size information of the molten pool. In the additive manufacturing process, the bilateral gas flow devices and the welding gun keep moving synchronously, welding wires are conveyed to a designed position of a deposited layer by a wire feeding device, and bilateral gas flows can directly and synchronously act on a melting region. A flow controller is adjusted in real time according to the size of the molten pool.
    Type: Application
    Filed: March 10, 2023
    Publication date: September 14, 2023
    Applicant: Beijing University of Technology
    Inventors: Fan JIANG, Guokai ZHANG, Bin XU, Debao LI, Shujun CHEN
  • Publication number: 20230241707
    Abstract: The invention provides a retractable friction stir welding spindle, aims at the deficiencies and defects of the existing friction stir welding spindle technology, that is, when the welding is finished, the stirring needle leaves a keyhole at the end of the weld seam, which affects the forming performance of the workpiece, the overall structure design of the spindle is complicated with many transmission chains and low reliability which is difficult to realize modularization. The retractable friction stir welding spindle includes an electric spindle system and a retracting mechanism. The electric spindle system includes stirring shaft shoulder, hilt, front end cover, hollow spindle, motorized spindle shell, motor rotor, motor stator, tail end cover, etc. The retracting mechanism includes stirring needle, connecting ball head and electric cylinder. The invention has the advantages of simple structure and can be mainly divided into two modules to improve reliability and integrity.
    Type: Application
    Filed: April 10, 2023
    Publication date: August 3, 2023
    Inventors: Shujun Chen, Bo Cheng, Xinhong Xie, Zirui Cao
  • Patent number: 11511712
    Abstract: A train compartment brake control method includes: acquiring the number of train compartments of a current train; acquiring the number and type of a current train compartment; and on the basis of a train brake instruction and the number of train compartments of the current train, calculating a braking force of the current train compartment, and performing brake control on the current train compartment. The technical solution described in the present application is applicable to a train having any number of train compartments. The above method acquires the number of train compartments of a train in real time, calculates the braking force required by each train compartment according to the number and type of a current train compartment, and performs brake control on the train.
    Type: Grant
    Filed: December 29, 2017
    Date of Patent: November 29, 2022
    Assignee: CRRC TANGSHAN CO., LTD.
    Inventors: Shujun Chen, Jiaying Qin, Zhonghua Liu, Yingyu Zhang, De Quan, Chuan Ma, Liqiang Zhu, Qinggang Zhang, Zhenhong Wang, Huijie Du, Yanxiang Liu
  • Publication number: 20210163047
    Abstract: A method for train suspension control by means of multiple air springs includes: receiving a vehicle load pressure; and controlling height adjustment valves according to the vehicle load pressure to adjust the pressure of a first air spring set, a second air spring set and/or a third air spring set. Three height adjustment valves are provided, and the three height adjustment valves form a triangular structure. Each of the first air spring set, the second air spring set and the third air spring set comprises a plurality of individual air springs, and all the individual air springs in each of the air spring sets are correspondingly connected to the same height adjustment valve. A system for train suspension control by means of multiple air springs and a train are further provided.
    Type: Application
    Filed: May 9, 2018
    Publication date: June 3, 2021
    Applicant: CRRC TANGSHAN CO., LTD.
    Inventors: Huijie DU, Shujun CHEN, Zheng LIU, Xinyong ZHANG, Zhonghua LIU, Jiaying QIN, Yongqin YANG, Wenhao HU, Liangjie LI, Limin ZHANG
  • Publication number: 20200164843
    Abstract: A train compartment brake control method comprises the following steps: acquiring the number of train compartments of a current train; acquiring the number and type of a current train compartment; and on the basis of a train brake instruction and the number of train compartments of the current train, calculating a braking force of the current train compartment, and performing brake control on the current train compartment. The technical solution described in the present application is applicable to a train having any number of train compartments. The above method acquires the number of train compartments of a train in real time, calculates the braking force required by each train compartment according to the number and type of a current train compartment, and performs brake control on the train.
    Type: Application
    Filed: December 29, 2017
    Publication date: May 28, 2020
    Applicant: CRRC TANGSHAN CO., LTD.
    Inventors: Shujun CHEN, Jiaying QIN, Zhonghua LIU, Yingyu ZHANG, De QUAN, Chuan MA, Liqiang ZHU, Qinggang ZHANG, Zhenhong WANG, Huijie DU, Yanxiang LIU
  • Patent number: 9656341
    Abstract: A low-back-pressure penetrating arc welding apparatus and a welding method using the same are disclosed. Through vacuuming a central vacuum chamber of a low-back-pressure protection device by a suction device, a plume of a penetrating arc located in the central vacuum chamber, as well as a back side of a keyhole molten pool, are maintained in a negative-pressure vacuum state relative to an argon gas ambience. A pressure gradient in the keyhole molten pool is thus generated that points from a front side of the keyhole molten pool to the back side of the keyhole molten pool. The pressure gradient thus further enhances a stiffness of the front side of the keyhole molten pool as well as a stability of the penetrating arc, resulting in an enhancement in the piercing capability of the penetrating arc, without changing a force distribution and a temperature gradient of the keyhole molten pool.
    Type: Grant
    Filed: October 13, 2014
    Date of Patent: May 23, 2017
    Assignee: BEIJING UNIVERSITY OF TECHNOLOGY
    Inventors: Fan Jiang, Jianxin Wang, Shujun Chen, Jinlong Gong, Guangqiang Men
  • Patent number: 9457420
    Abstract: Gas metal arc welding (GMAW) is a widely used process for joining metals. Its main advantage over its competition gas tungsten arc welding (GTAW) is its high productivity in depositing metals. However, to melt metal from the wire to deposit into the work-piece, additional heat is consumed and applied to the work-piece with an uncontrolled fixed proportion to the effective heat that melts the wire. Such additional heat is often in excess of the needed heat input for the work-piece. The side-effects include a waste of the energy, an increased distortion, and possible materials property degradation. This invention is to device a method to transfer this part of heat to melt the wire by adding two wires, which form a pair of arc spots, under a tungsten arc. It also devices a method to assure the arc between the two wires be maintained stable such that the transfer be successfully continuous.
    Type: Grant
    Filed: June 13, 2013
    Date of Patent: October 4, 2016
    Assignee: BEIJING UNIVERSITY OF TECHNOLOGY
    Inventors: Shujun Chen, Liang Zhang, Ning Huang, Xuping Wang, Zhenyang Lu, Fan Jiang
  • Publication number: 20160243642
    Abstract: A low-back-pressure penetrating arc welding apparatus and a welding method using the same are disclosed. Through vacuuming a central vacuum chamber of a low-back-pressure protection device by a suction device, a plume of a penetrating arc located in the central vacuum chamber, as well as a back side of a keyhole molten pool, are maintained in a negative-pressure vacuum state relative to an argon gas ambience. A pressure gradient in the keyhole molten pool is thus generated that points from a front side of the keyhole molten pool to the back side of the keyhole molten pool. The pressure gradient thus further enhances a stiffness of the front side of the keyhole molten pool as well as a stability of the penetrating arc, resulting in an enhancement in the piercing capability of the penetrating arc, without changing a force distribution and a temperature gradient of the keyhole molten pool.
    Type: Application
    Filed: October 13, 2014
    Publication date: August 25, 2016
    Inventors: Fan Jiang, Jianxin Wang, Shujun Chen, Jinlong Gong, Guangqiang Men
  • Publication number: 20160067811
    Abstract: The present disclosure relates to a central negative pressure arc welding apparatus and method. Through a pumping gas pipeline from the suction device to hollow tubular electrode, a suction device may establish a stable, high energy density and binding arc beneath hollow tubular electrode. The binding degree, energy density and voltage of arc may be adjusted by changing the value of negative pressure in the center of arc. Accordingly, welding heat input and coefficient of weld may be precisely controlled. This apparatus may further set up central pulsating negative pressure arc by turning on valve periodically to make a periodic negative pressure in the center of arc. This present disclosure both possesses good stability and adaptability of traditional Gas Tungsten Arc Welding and achieves binding arc and good penetration of Plasma Arc Welding. Furthermore, this present disclosure improves the mechanical properties of welded joints.
    Type: Application
    Filed: September 25, 2015
    Publication date: March 10, 2016
    Inventors: Fan JIANG, Jianxin Wang, Shujun Chen, Shan Sheng, Jinlong Gong
  • Publication number: 20140291297
    Abstract: Gas metal arc welding (GMAW) is a widely used process for joining metals. Its main advantage over its competition gas tungsten arc welding (GTAW) is its high productivity in depositing metals. However, to melt metal from the wire to deposit into the work-piece, additional heat is consumed and applied to the work-piece with an uncontrolled fixed proportion to the effective heat that melts the wire. Such additional heat is often in excess of the needed heat input for the work-piece. The side-effects include a waste of the energy, an increased distortion, and possible materials property degradation. This invention is to device a method to transfer this part of heat to melt the wire by adding two wires, which form a pair of arc spots, under a tungsten arc. It also devices a method to assure the arc between the two wires be maintained stable such that the transfer be successfully continuous.
    Type: Application
    Filed: June 13, 2013
    Publication date: October 2, 2014
    Inventors: SHUJUN CHEN, LIANG ZHANG, NING HUANG, XUPING WANG, ZHENYANG LU, FAN JIANG
  • Publication number: 20110171041
    Abstract: A vacuum pump comprises an actuator with an actuating shaft; a mounting base with a first side being attached to the actuator; a pumping device having a pump ring being attached to a second side of the mounting base opposite to the first side; and a sound-proof cap being attached to an end face of the pump ring and the pumping device being driven by the actuating shaft penetrating through the mounting base.
    Type: Application
    Filed: September 21, 2009
    Publication date: July 14, 2011
    Inventors: Bing Zhao, Ye Yuan, Shujun Chen, Zhenlin Tang