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US 4,357,819 AGranted
Method and apparatus for simultaneously forming three uniform metal rounds
AssigneeStructural Metals, Inc.
InventorDayton W. Elley
Life of this patent
Estimating the term…
Abstract
Method and apparatus for splitting a single metal rod into three equal cross-section areas by passing the rod through pairs of rollers to form three connected equal areas, but not identically shaped strands, then applying a separating force to separate the rods into individual lengths.
Claims8
A method for simultaneously forming three uniform metal rounds from a single rod, comprising the steps of:
- (1) forming a single elongated metal rod;
- (2) rolling said metal rod to form in said metal rod a cross-section having serially adjacent first, second and third strands of substantially equal areas but not identical shapes, said first strand connected to said second strand by a first thin connecting portion and said second strand connected to said third strand by a second thin connecting portion;
- said first and third strands form substantially identical elliptical shapes with a minor axis of approximately 0.437 inches and a radius of curvature measured about said minor axis of approximately 0.312 inches, said minor axis being vertical;
- said second strand forms a substantially diamond shape with a minor diagonal of approximately 0.452 inches and a major diagonal of less than approximately 0.625 inches with the ends along said major diagonal rounded, said major diagonal being vertical;
- said first and second strands and said second and third strands have approximately a 60.degree. angle of separation;
- said thin connecting portions have a width of approximately 0.031 inches;
- (3) separating said strands along said thin connecting portions;
- and
- (4) simultaneously rolling each of said strands into rounds of substantially equal cross-sectional area.
6 more elements
A method for simultaneously forming three uniform metal rounds from a single rod, comprising the steps of:
- (1) forming a single elongated metal rod;
- (2) preliminarily rolling said metal rod to form in said metal rod a cross-section having serially adjacent first, second and third preliminary strands;
- said first preliminary strand connected to said second preliminary strand by a first thick connecting portion and said second preliminary strand connected to said third preliminary strand by a second thick connecting portion;
- said first and third preliminary strands from substantially elliptical shapes;
- said second preliminary strand forms a substantially rectangular shape with truncated corners;
- (3) rolling said metal rod to form in said metal rod a cross-section having serially adjacent first, second and third strands of substantially equal areas but not identical shapes, said first strand connected to said second strand by a first thin connecting portion and said second strand connected to said third strand by a second thin connecting portion;
- (4) separating said strands along said thin connecting portions;
- and
- (5) simultaneously rolling each of said strands into rounds of substantially equal cross-sectional area.
6 more elements
Apparatus for simultaneously forming three metal rounds, comprising:
- a pair of preliminary rollers;
- each of said preliminary rollers having identical cylindrical surfaces with serially adjacent first, second and third grooves formed therein perpendicular to the longitudinal axis of said preliminary rollers;
- said first and third grooves being approximately an elliptical arc having a radius of curvature measured about the major axis of approximately 0.125 inches, a maximum width of approximately 0.369 inches and a maximum depth of approximately 0.203 inches;
- and
- said second groove being generally a truncated V-shape, having a greatest width of approximately 0.452 inches, a depth of approximately 0.100 inches and a narrowest width of approximately 0.270 inches.
2 more elements
Apparatus for simultaneously forming three metal rounds, comprising:
- a pair of forming rollers;
- each of said forming rollers having identical cylindrical surfaces with serially adjacent first, second and third grooves formed therein perpendicular to the longitudinal axis of said forming rollers;
- said first and third grooves being approximately an elliptical arc having a radius of curvature of approximately 0.312 inches measured about the minor axis, a greatest width of approximately 0.437 inches and a maximum depth of approximately 0.125 inches;
- said second groove being generally a rounded V-shape having a maximum width of approximately 0.425 inches and a maximum depth of approximately 0.312 inches;
- said first and second grooves connected by a flat portion with a width of approximately 0.031 inches;
- and
- said second and third grooves connected by a flat portion with a width of approximately 0.031 inches.
4 more elements
Separating means for use in simultaneously forming three metal rounds, comprising:
- a housing with a top housing portion and a bottom housing portion;
- each housing portion having first, second and third entry guide grooves and first, second and third exit guide grooves;
- a first separating ridge formed between said first and second entry guide grooves for providing horizontal tearing force;
- a second separating ridge formed between said second and third entry guide grooves for providing horizontal separating force;
- a roller mounted within said housing portion between said entry guide grooves and said exit guide grooves, perpendicular to said entry guide grooves and said exit guide grooves;
- third and fourth separating ridges formed in one of said rollers for providing further horizontal separating force;
- and
- said top housing portion and said bottom housing portion adapted for mounting so that said entry and exit guide grooves cooperate to form guides for a three strand metal rod to be separated.
5 more elements
Dependencies are inferred from the claim text.