公开(公告)号：US20200031057A1

公开(公告)日：2020-01-30

申请号：US16248296

申请日：2019-01-15

Applicant: Huazhong University of Science and Technology

Inventor： Chunze YAN ,  Hongzhi WU ,  Yusheng SHI ,  Shifeng WEN ,  Lichao ZHANG

IPC: B29C64/393 ,  B29C64/118 ,  B29C64/268 ,  B29C64/209 ,  B33Y10/00 ,  B33Y30/00 ,  B33Y50/02

Abstract: The invention belongs to the field of filament additive manufacturing, and discloses a polymer multi-material high-flexibility laser additive manufacturing system and a method thereof. The system comprises a first robot arm, a second robot arm, a positioner, a rotational extrusion nozzle in which a plurality of extrusion modules are disposed and a laser, each extrusion module is used for extruding one kind of filament, and the rotational extrusion nozzle is connected with the first robot which drives the rotational extrusion nozzle to move according to a preset trajectory; the laser is connected with the second robot, and is used for emitting a laser to fuse the filament extruded from the rotational extrusion nozzle, and through the cooperative motion of the first robot and the second robot, the extrusion and fusion of the filament are performed synchronously; the positioner serves as a forming mesa, and the rotation of the positioner cooperates with the motions of the two robots. With the present invention, problems such as easy blocking and short service life of the extrusion nozzle in the FDM forming are solved, thereby ensuring high flexibility of the manufacturing system and achieving the extrusion forming of the multi-material filaments.

公开(公告)号：US20200376708A1

公开(公告)日：2020-12-03

申请号：US16655215

申请日：2019-10-16

Applicant: Huazhong University of Science and Technology

Inventor： Yusheng SHI ,  Chunze YAN ,  Zhaoqing LI ,  Peng CHEN ,  Zhufeng LIU ,  Jiamin WU ,  Shifeng WEN ,  Chenhui LI ,  Lichao ZHANG

IPC: B28B1/00 ,  B33Y10/00 ,  B33Y30/00 ,  B33Y40/00 ,  B29C64/153 ,  B29C64/35 ,  B29C64/232 ,  B29C64/236 ,  B29C64/245 ,  B29C64/25 ,  C23C16/24

Abstract: A selective laser sintering (SLS) device. The SLS device includes a laser forming unit, a support platform and a driving mechanism. The support platform is configured to support a plurality of raw materials for additive manufacturing of an object including a plurality of sections. The laser forming unit is disposed on the support platform and is configured to lay powders on a surface of each section of the object and sinter the powders. The driving mechanism is disposed under the laser forming unit and includes a vertical driving mechanism and a horizontal driving mechanism. The vertical driving mechanism is connected to the laser forming unit and configured to lift the laser forming unit layer by layer. The horizontal driving mechanism is configured to drive the laser forming unit to move in a horizontal direction with respect to the support platform.

公开(公告)号：US20200114583A1

公开(公告)日：2020-04-16

申请号：US16357791

申请日：2019-03-19

Applicant: Huazhong University of Science and Technology

Inventor： Shifeng WEN ,  Peng CHEN ,  Chunze YAN ,  Lei YANG ,  Zhaoqing LI ,  Hongzhi WU ,  Yusheng SHI

IPC: B29C64/393 ,  B29C64/153 ,  B29C64/245 ,  B33Y30/00 ,  B33Y50/02

Abstract: The present disclosure belongs to the technical field of advanced manufacturing auxiliary equipment, and discloses an independently temperature-controlled high-temperature selective laser sintering frame structure, comprising a galvanometric laser scanning system, a powder feeding chamber, a forming chamber and a heat-insulating composite plate, and targeted optimization design is performed on the respective functional components. According to the invention, the independently temperature-controlled frame structure can simultaneously ensure the uniformity of the powder preheating temperature field of the powder feeding chamber platform and the uniformity of the processing temperature field of the forming chamber platform, so that powder on the powder feeding chamber platform can reach the sinterable temperature before being conveyed, and conveyance of cold powder to the sintered melt is avoided, thereby reducing the possibility of warpage of the parts while reducing actual sintering delay time and improving actual sintering efficiency. The independently temperature-controlled frame structure of the present disclosure is particularly suitable for high-temperature laser sintering of high-performance polymers such as polyaryletherketones and aromatic polyamides at 400° C.

公开(公告)号：US20230027566A1

公开(公告)日：2023-01-26

申请号：US17785914

申请日：2020-11-26

Applicant: HUAZHONG UNIVERSITY OF SCIENCE AND TECHNOLOGY

Inventor： Yusheng SHI ,  Rongzhen LIU ,  Gong CHEN ,  Yu YANG ,  Jie LIU ,  Shifeng WEN ,  Jiamin WU

IPC: B28B1/00 ,  B33Y10/00 ,  B33Y30/00

Abstract: The present invention belongs to the technical field related to additive manufacturing, and provides a multi-field composite-based additive manufacturing device and method. The device comprises a powder delivery adjustment module, a sound field control module, a microwave field/thermal field control module and a microprocessor. The powder delivery adjustment module, the sound field control module and the microwave field/thermal field control module are respectively connected to the microprocessor; the powder delivery adjustment module comprises a raw material dispersion chamber, and the raw material dispersion chamber is provided within a forming cavity formed by a housing; the sound field control module is also provided within the forming cavity and is located below the raw material dispersion chamber; the microwave field/thermal field control module comprises a plurality of microwave generators provided in the forming cavity, the plurality of microwave generators are respectively located at two sides of a forming area.

公开(公告)号：US20190330119A1

公开(公告)日：2019-10-31

申请号：US16503613

申请日：2019-07-04

Applicant: Huazhong University of Science and Technology

Inventor： Chunze YAN ,  Wei ZHU ,  Hua FU ,  Zhongfeng XU ,  Yusheng SHI ,  Chenhui LI ,  Jiamin WU ,  Shifeng WEN ,  Zhaoqing LI

IPC: C04B35/565 ,  C04B35/80 ,  C04B35/622

Abstract: A method of preparing a C/C-SiC composite part, including: preparing, using a solvent evaporation process, carbon fiber composite powders coated with a phenol resin; according to a three-dimensional model of a to-be-prepared part, forming a green part corresponding to the to-be-prepared part using the carbon fiber composite powders and a 3D printing technology; densifying the green part to yield a C/C porous body having a density of 0.7 to 1.1 g/cm3 and an open porosity of 30 to 50%; and siliconizing the C/C porous body under vacuum, removing excess silicon to yield a primary carbon fiber reinforced carbon-silicon carbide (C/C-SiC) body, densifying the primary C/C-SiC body, to obtain a final C/C-SiC composite part.