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：US20130039378A1

公开(公告)日：2013-02-14

申请号：US13655478

申请日：2012-10-19

Applicant: Huazhong University of Science and Technology

Inventor： Xiao ZHU ,  Guangzhi ZHU ,  Changhong ZHU ,  Lijun QI ,  Jianli SHANG ,  Xingyun DUAN ,  Peng CHEN

IPC: H01S3/0941

CPC classification number: H01S3/0604 ,  H01S3/0404 ,  H01S3/0407 ,  H01S3/042 ,  H01S3/0623 ,  H01S3/0625 ,  H01S3/08059 ,  H01S3/09408 ,  H01S3/094084 ,  H01S3/09415

Abstract: A laser including a semiconductor laser stack group, a beam compositor, a pump beam collimator, a thin-disk laser crystal, a first and a second parabolic reflectors with the same facial contour function, a corrective reflector, an output mirror, and a jet-flow impact cooling system. The thin-disk laser crystal and the output mirror form a laser resonant cavity. The first parabolic reflector, second parabolic reflector, thin-disk laser crystal, and corrective reflector form a multi-pumping focus cavity. The jet-flow impact cooling system is used for cooling the thin-disk laser crystal. The pump light produced by the semiconductor laser stack group is composited by the beam compositor, collimated by the pump light collimator, and enters the multi-pumping focus cavity. Within the multi-pumping focus cavity, the pump light is focused, collimated, and deflected to converge on the thin-disk laser crystal. The laser resonant cavity produces and outputs a laser beam.

Abstract translation: 包括半导体激光堆叠组，光束合成器，泵浦光束准直器，薄盘激光晶体，具有相同面部轮廓功能的第一和第二抛物面反射器的激光器，校正反射器，输出反射镜和射流 流冲击冷却系统。 薄盘激光晶体和输出镜形成激光谐振腔。 第一抛物面反射器，第二抛物面反射器，薄盘激光晶体和校正反射器形成多泵浦焦点腔。 射流冲击冷却系统用于冷却薄盘激光晶体。 由半导体激光堆组产生的泵浦光由光束合成器复合，由泵浦光准直器准直，并进入多泵浦聚焦腔。 在多泵浦聚焦腔内，泵浦光被聚焦，准直和偏转以会聚在薄盘激光晶体上。 激光谐振腔产生并输出激光束。