Claims
- 1. Rolling mill, comprising:
- (a) a furnace for heating billets having a square cross-sectional shape,
- (b) a primary stand located adjacent the furnace for receiving a billet on-the-corner, the primary stand having a first pair of rolls with horizontal axes and having a second pair of rolls with vertical axes, at least one of said pair of rolls being rotatably driven, the peripheries of all four rolls being grouped to form a roll pass that converts the billet from its square cross-sectional shape to an octagonal cross-sectional shape, the rolls of the primary stand being in the form of discs with narrow peripheries, each periphery being formed with a V-shaped groove having an angle of 135.degree., the edges of all rolls being beveled to provide a narrow slot-like space between adjacent, 90.degree.-related rolls, and
- (c) a secondary stand located in line with the primary stand, the secondary stand consisting of a planetary diagonal rolling mill including rolls which are driven independently of the driven rolls of said primary stand for converting the billet from the octagonal cross-sectional shape to a circular cross-sectional shape.
- 2. Rolling mill as recited in claim 1, wherein the rolls of the primary stand are in the form of oppositely-directed, frusto-conical surfaces whose smaller ends join to form said V-shaped groove.
- 3. Rolling mill as recited in claim 1, wherein a conveyor extends between the primary stand and the secondary stand.
- 4. Rolling mill as recited in claim 1, comprising:
- (a) a shear in line with and spaced from the exit end of the secondary stand, and
- (b) a conveyor extending between the secondary stand and the shear.
Priority Claims (1)
Number |
Date |
Country |
Kind |
2418453 |
Apr 1974 |
DEX |
|
CROSS-REFERENCE TO RELATED APPLICATIONS
This application is a continuation of application Ser. No. 866,795 filed Jan. 5, 1978, abandoned, which is a continuation of application Ser. No. 796,312 filed May 12, 1977, abandoned, which is a continuation-in-part of application Ser. No. 675,478 filed Apr. 9, 1976, abandoned, which is a continuation of application Ser. No. 567,607 filed Apr. 14, 1975, abandoned.
US Referenced Citations (3)
Number |
Name |
Date |
Kind |
2059124 |
Layton |
Oct 1936 |
|
3643488 |
Bretschneider |
Feb 1972 |
|
3735617 |
Bretschneider |
May 1973 |
|
Continuations (3)
|
Number |
Date |
Country |
Parent |
866795 |
Jan 1978 |
|
Parent |
796312 |
May 1977 |
|
Parent |
567607 |
Apr 1975 |
|
Continuation in Parts (1)
|
Number |
Date |
Country |
Parent |
675478 |
Apr 1976 |
|