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US 9,790,564 B2Granted
Heat treatment apparatus for hot stamping and forming method using the same
AssigneeHyundai Motor Company
InventorsJae Ryeon Hwang, Byung Hun Kim, Jong Ho Maeng, Jang Choon Park, Heong Joo Park
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Abstract
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.
Claims17
A heat treatment apparatus for hot stamping, comprising:
- a frame;
- 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;
- and
- cooling units provided to be vertically movable at centers of the upper and lower sides of the frame, and configured to cool the heated steel plate while pressurizing the steel plate from upper and lower sides,
- wherein the heating units include:
- first and second upper electrodes installed at the upper sides of the frame, respectively, and vertically moving according to operations of first actuators;
- and
- first and second lower electrodes installed at the lower sides of the frame to correspond to the first and second upper electrodes, respectively, and
- wherein the first and second upper electrodes and the first and second lower electrodes are provided to be horizontally movable.
6 more elements
A hot stamping forming method, comprising steps of:
- (a) providing a steel plate cut from a steel sheet;
- (b) cold-forming the steel plate to a shape corresponding to a finish product;
- (c) trimming and piercing the cold formed steel plate;
- (d) transforming a phase by heating and cooling the trimmed steel plate in the same apparatus;
- and
- (e) extracting the phase transformed steel plate,
- wherein in the step (d), the heat treatment apparatus includes:
- frame;
- and
- cooling units provided to be vertically movable at centers of the upper and lower sides of the frame, and configured to cool the heated steel plate while pressurizing the steel plate from upper and lower sides, and
- wherein in step (d), in the state where the steel plate is heated, an upper mold and a lower mold of the cooling units are combined and the heated steel plate is cooled by cooling channels formed inside the combined upper and lower molds.
8 more elements
Dependencies are inferred from the claim text.