Variable die, and pressing apparatus and method
AssigneePosco
InventorJae-Wook Lee
Life of this patent
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Abstract
A variable die according to an embodiment of the present invention may comprise: a first lower die part; and a first upper die part disposed above the first lower die part, wherein: the first lower die part comprises a first lower die center part and a first lower die side part; the first lower die center part includes a first sensor unit which measures a distance; a first lower die side part includes an inner member having a slope, and a drive unit which moves the inner member toward the first lower die center part; the first sensor unit measures a forming distance which is the distance from the first sensor unit to a material; and the driver unit is driven on the basis of the forming distance to adjust a correction distance which is the moving distance of the inner member.
Claims18
A variable die comprising:
- a first lower die portion;
- and
- a first upper die portion disposed above the first lower die portion,
- wherein the first lower die portion includes:
- a first lower die center portion, on which a material is seated, and including a first sensor unit;
- and
- a first lower die side part installed on a side surface of the first lower die center portion,
- the first lower die side part includes:
- an inner member having an inclined surface close to the first lower die center portion from top to bottom;
- and
- a driving unit moving the inner member in a first direction, the first direction is a direction toward the first lower die center portion,
- the first upper die portion includes:
- a first upper die center portion disposed above the first lower die center portion, and the first upper die center portion moving downwardly toward the first lower die center portion;
- and
- a first upper die side part installed on a side surface of the first upper die center portion, the first upper die side part is moving downwardly guided by the inclined surface and rotatably moving to the side surface of the first lower die center portion,
- the first sensor unit measures a forming distance, the forming distance is a distance from the first sensor unit to the material, and
- the driving unit is driven based on the forming distance to adjust a correction distance, the correction distance is a moving distance of the inner member.
A pressing method comprising:
- a first pressing operation of forming a first material with a variable die under a forming condition determined by a first set distance, An, where n is a number of repetitions;
- a forming distance measuring operation of measuring a first forming distance, Bn, the first forming distance is a distance between the first material and a first sensor unit of the variable die;
- a set distance correcting operation of determining a second set distance, An+1, the second set distance is a set distance for a following round, based on a difference between the first set distance and the first forming distance;
- and
- a second pressing operation of forming a second material following the first material with the variable die under a forming condition determined by the second set distance.
Dependencies are inferred from the claim text.