Hyundai Motor Company

Kia Motors Corporation

Unist-academy Industry Research Corporation

Jae Ryeon Hwang

Franklin Don Bien

Heong Joo Park

Byung Hun Kim

Jong Ho Maeng

Nguyen Ngoc Quang

Liu Zhenyi

Jang Choon Park

Chan Woo Jeong

ByungHun Kim

Hyon Gi Yoo

Seul Ki Rom Kim

An apparatus for detecting a defect of a press panel includes: an acoustic emission sensor unit configured to detect at least one elastic wave signal emitted from the press panel as a detection target during press work, a period measurer configured to measure a period as a section in which there are consecutive signals with a greater voltage than a threshold voltage among the at least one detected signals, and a defect existence determination unit configured to determine that a defect is generated in the press panel when the measured period is greater than a first reference value, and to determine that the press panel is in a normal state when the measured period is smaller than a second reference value which is smaller than the first reference value.

Apparatus and method for detecting defect of press panel

A heat treatment apparatus for hot stamping includes a frame, and heating units provided to be vertically movable at both upper and lower sides of the frame and configured to heat a cold formed steel plate by electrifying the steel plate. Cooling units are provided to be vertically movable at centers of the upper and lower sides of the frame and are configured to cool the heated steel plate while pressurizing the steel plate from upper and lower sides.

Heat treatment apparatus for hot stamping and forming method using the same

Growing community of inventors

Ulsan, South Korea

Jae Ryeon Hwang