National Chung Shan Institute of Science and Technology

Yi-Cherng Ferng

Kuo-Kuang Jen

Chun-Hsiang Huang

Yi-Jen Chiu

Chao-Kuei Lee

Yuan-Yao Lin

Shun-Yi Jian

Ming-Hsien Lin

Chia-Hsiang Chang

Yu-Chih Tzeng

Chun-Hsiang Kao

Chia-Yu Lee

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.

Powdered surface monitoring system of additive manufacturing

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.

Electropolishing treatment method for stainless steel workpiece

Growing community of inventors

Taoyuan, Taiwan

Yi-Cherng Ferng