Method and apparatus for wire drawing
AssigneeThe Goodyear Tire & Rubber Company
InventorsRobert E. Lionetti, Patrick E. Joseph, Dong K. Kim, Farrel B. Helfer
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Abstract
A method and apparatus for drawing steel wire to produce high tensile strength, steel wire with increased torsional ductility. The wire is drawn through a plurality of standard dies (14) in a wire drawing machine (10). The cross section of the wire is reduced by a constant reduction of about 15% to about 18% at each of the standard dies (14) with the exception of the final two dies (18, 19). The wire is then reduced by about 10% to about 90% of the typical reduction at the next to last die (18) and the remainder of the reduction at the final die (19).
Claims16
A method of drawing steel wire to produce high tensile strength, steel wire with increased torsional ductility, comprising the steps of:
- a. drawing wire through a plurality of standard dies followed by a next to last die and a final die arranged in a wire drawing device;
- b. reducing the cross section of the wire by a constant reduction of about 15% to about 18% at each of the plurality of standard dies;
- and
- c. reducing the wire at said final die and said next to last die of said wire drawing device by a total amount to equal said constant reduction wherein the reduction at the next to last die is between about 10% to about 90% of the constant reduction and the remainder of the reduction is at the final die.
An apparatus for drawing steel wire to produce high tensile strength, steel wire with increased torsional ductility, comprising:
- a. a plurality of standard dies followed by a next to last die and a final die arranged in a wire drawing device;
- b. each of said plurality of standard dies reduces the cross section of the wire by a constant reduction of about 15% to about 18%;
- and
- c. said next to last die and said final die in said wire drawing device reducing the cross section of the wire by a total reduction substantially equal to the constant reduction, said next to last die reducing the cross section of the wire by a reduction of about 10% to about 90% of the constant reduction and the remainder of the cross section being reduced at said final die.
A method of drawing steel wire to produce high tensile strength, steel wire with increased torsional ductility, comprising the steps of:
- a. drawing wire through a plurality of standard dies followed by a final die arranged in a wire drawing device;
- b. reducing the cross section of the wire by a constant reduction of about 15% to about 18% at each of the standard dies;
- and
- c. reducing the cross section of the wire at said final die by a reduction of about 10% to about 70% of the constant reduction.
An apparatus for drawing steel wire to produce high tensile strength, steel wire with increased torsional ductility, comprising:
- a. a plurality of standard dies followed by a final die in a wire drawing device;
- b. each of said plurality of standard dies reducing the cross section of the wire by a constant reduction of about 15% to about 18%;
- and
- c. said final die reducing the cross section of the wire by a reduction of about 10% to about 70% of the constant reduction.
Dependencies are inferred from the claim text.