Up-drawing continuous casting method and up-drawing continuous casting apparatus
AssigneeToyota Jidosha Kabushiki Kaisha
InventorsHiroyuki Ikuta, Yuto Tanaka, Naoaki Sugiura
Life of this patent
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Abstract
An up-thawing continuous casting method includes drawing up molten metal (M1) held in a holding furnace (101), through a shape determining member (102) that determines a sectional shape of a cast casting (M3). The sectional shape determined by the shape determining member (102) includes a round-cornered portion, and a value (Rf) of a curvature radius of the round-cornered portion that is determined by the shape determining member (102) is smaller than a design value (Rt) of a curvature radius of a round-cornered portion of the casting (M3).
Claims6
An up-drawing continuous casting method comprising:
- drawing up molten metal held in a holding furnace, through a shape determining
- member that determines a sectional shape of a cast casting, wherein
- the sectional shape determined by the shape determining member includes a round-cornered portion;
- and
- a value of a curvature radius of the round-cornered portion that is determined by the shape determining member is smaller than a design value of a curvature radius of a round-cornered portion of the casting;
- wherein:
- when determining the value of the curvature radius of the round-cornered portion that is determined by the shape determining member, a casting simulation is executed by a computer at a casting speed at which the curvature radius of the round-cornered portion of the casting becomes larger than the curvature radius of the round-cornered portion that is determined by the shape determining member;
- and
- the value of the curvature radius of the round-cornered portion that is determined by the shape determining member is determined based on a curvature radius of a round-cornered portion of a casting obtained by the casting simulation.
An up-drawing continuous casting apparatus comprising:
- a holding furnace that holds molten metal, and a shape determining member that is arranged above a molten metal surface of the molten metal held in the holding furnace, and determines a sectional shape of a cast casting by the molten metal passing through the shape determining member, wherein
- the sectional shape determined by the shape determining member includes a round-cornered portion;
- and
- a computer configured to execute a casting simulation for determining a value of a curvature radius of the round-cornered portion that is determined by the shape determining member at a casting speed at which a curvature radius of a round-cornered portion of the casting becomes larger than the curvature radius of the round-cornered portion that is determined by the shape determining member, wherein:
- the value of the curvature radius of the round-cornered portion that is determined by the shape determining member is determined based on a curvature radius of a round-cornered portion of a casting obtained by the casting simulation;
- and
- the value of the curvature radius of the round-cornered portion that is determined by the shape determining member is smaller than a design value of a curvature radius of a round-cornered portion of the cast casting.
Dependencies are inferred from the claim text.