公开(公告)号：US11486052B2

公开(公告)日：2022-11-01

申请号：US17562032

申请日：2021-12-27

Applicant: NATIONAL CHUNG SHAN INSTITUTE OF SCIENCE AND TECHNOLOGY

Inventor： Chun-Hsiang Kao ,  Yi-Cherng Ferng ,  Kuo-Kuang Jen ,  Shun-Yi Jian ,  Ming-Hsien Lin ,  Yu-Chih Tzeng ,  Chia-Yu Lee

IPC: C25F3/24 ,  B33Y80/00

Abstract: Provides an electropolishing treatment method for a stainless steel workpiece, wherein the method comprises the following steps: placing the stainless steel workpiece in an oxalic acid solution and performing supersonic oscillation; performing a first electropolishing treatment to the stainless steel workpiece, wherein the first electropolishing treatment uses the stainless steel workpiece as an anode and 10% to 15% perchloric acid as an electrolyte, and when a constant voltage is set as 12V, the first electropolishing treatment procedure is performed; and performing a second electropolishing treatment to the stainless steel workpiece, wherein the second electropolishing treatment uses the stainless steel workpiece after the first electropolishing treatment as an anode, and an electrolyte consists of ethanol, sulfuric acid and perchloric acid, and when a constant voltage is set as 12V, the second electropolishing treatment is performed to obtain the stainless steel workpiece after the second electropolishing treatment.

公开(公告)号：US11850799B2

公开(公告)日：2023-12-26

申请号：US17973552

申请日：2022-10-26

Applicant: NATIONAL CHUNG SHAN INSTITUTE OF SCIENCE AND TECHNOLOGY

Inventor： Kuo-Kuang Jen ,  Yi-Cherng Ferng ,  Chia-Hsiang Chang ,  Chun-Hsiang Huang ,  Yuan-Yao Lin ,  Chao-Kuei Lee ,  Yi-Jen Chiu

IPC: B29C64/386 ,  B29C64/153 ,  B29C64/286 ,  B29C64/268 ,  B33Y50/00 ,  B33Y30/00

CPC classification number: B29C64/386 ,  B29C64/153 ,  B29C64/268 ,  B29C64/286 ,  B33Y50/00 ,  B33Y30/00

Abstract: A powdered surface monitoring system of additive manufacturing comprises an additive manufacturing processing cavity, having therein a working area carrying powder to be sintered; a laser source, generating a laser beam, which passes through a reflector, a dichroic mirror and a scanning vibration mirror and is transmitted to an upper surface of the powder in the working area; a polarization imaging device, having therein a beam expander group, a polarizer group and at least one photodetector, the polarizer group consisting of a plurality of linear polarizers, and the number of photodetectors being equal to the number of the linear polarizers.