US 6,085,565 AGranted

Eight-roller type rolling mill and method of rolling using the mill

AssigneeDaido Steel Co., Ltd.

InventorsHiroshi Suda, Tatsuo Tajima

Life of this patent

Estimating the term…

Abstract

A final finish-rolling stand of a rolling machine for producing round bar material is constructed as an eight-roller type rolling machine comprising: front four rollers of "+" distribution and back four rollers of "X" distribution which are contained in one housing block. Only one driving source is used for the rolling machine, and the driving force from the driving source is transmitted to one roller of the front four rollers to forcibly drive this roller. The remaining rollers are freely rotatable and rotate synchronously with transfer of the material being rolled so as to carry out rolling down of the material. Structure of the rolling machine is simple and adjustable range of sizes of the product is wide.

Claims7

Dependent claims

An eight-roller type rolling mill comprising:

(A) front four rollers comprising a first pair of rollers disposed oppositely with intermediation of a material to be rolled, axes of the rollers of the first pair being parallel;
and a second pair of rollers disposed oppositely with intermediation of said material to be rolled at a same position as that of the rollers of the first pair in a longitudinal direction of said material to be rolled, axes of the rollers of the second pair being perpendicular to the axes of the rollers of the first pair, the first and the second pair of the rollers simultaneously rolling said material to be rolled at the same point in the longitudinal direction of the material;
(B) back four rollers installed in the down stream of the material being rolled comprising a third pair of rollers disposed oppositely with intermediation of said material to be rolled, axes of the rollers of the third pair being 45.degree. inclined to those of the rollers of the first and the second pairs;
and a fourth pair of rollers disposed oppositely with intermediation of said material to be further rolled at a same position as that of the rollers of the third pair in the longitudinal direction of said material, axes of the rollers of the rollers of the fourth pair being perpendicular to the axes of the rollers of the third pair;
the third and the fourth pair of the rollers simultaneously rolling said material to be rolled at the same point in the longitudinal direction of the material;
and
(C) a housing block in which the front four rollers and the back four rollers are installed within a sufficiently small distance that no guide is necessary therebetween and so that said material being rolled is directly passed from the front four rollers to the back four rollers;
wherein only one driving source is provided as a driving source for the rollers at rolling of said material to be rolled;
the driving source drives any one roller of the front four rollers, and the remaining three rollers of the front four rollers and all the four rollers of the back four rollers are kept substantially fee rotating so that the free rotating rollers may rotate following advance of said material to be rolled.

6 more elements

An eight-roller type rolling mill comprising:

(A) front four rollers comprising a first pair of rollers disposed oppositely with intermediation of a material to be rolled, axes of the rollers of the first pair being parallel, and a second pair of rollers disposed oppositely with intermediation of said material to be rolled at a same position as that of the rollers of the first pair in a longitudinal direction of said material to be rolled, axes of the rollers of the second pair being perpendicular to the axes of the rollers of the first pair;
the first and the second pair of the rollers simultaneously rolling said material to be rolled at the same point in the longitudinal direction of the material;
(B) back four rollers installed in the down stream of the material being rolled comprising a third pair of rollers disposed oppositely with intermediation of said material to be rolled, axes of the rollers of the third pair being 45.degree. inclined to those of the rollers of the first and the second pairs;
and a fourth pair of rollers disposed oppositely with intermediation of said material to be further rolled at a same position as that of the rollers of the third pair in the longitudinal direction of said material, axes of the rollers of the rollers of the fourth pair being perpendicular to the axes of the rollers of the third pair;
the third and the fourth pair of the rollers simultaneously rolling said material to be rolled at the same point in the longitudinal direction of the material;
and
(C) a housing block in which the front four rollers and the back four rollers are installed within a sufficiently small distance that no guide is necessary therebetween and so that said material being rolled is directly passed from the front four rollers to the back four rollers;
and
(D) a single driving means for driving the eight rollers, the driving means only driving one roller of the front four rollers and thereby rolling said material to be rolled, and the remaining three rollers of the front four rollers and all the four rollers of the back four rollers are free rotating so that the free rotating rollers rotate following advance of said material to be rolled.

6 more elements

An eight-roller type rolling mill comprising:

(A) front four rollers comprising a first pair of rollers disposed oppositely with intermediation of a material to be rolled, axes of the rollers of the first pair being parallel;
and a second pair of rollers disposed oppositely with intermediation of said material to be rolled at a same position as that of the rollers of the first pair in a longitudinal direction of said material to be rolled, axes of the rollers of the second pair being perpendicular to the axes of the rollers of the first pair;
the first and the second pair of the rollers simultaneously rolling said material to be rolled at the same point in the longitudinal direction of the material;
(B) back four rollers installed in the down stream of the material being rolled comprising a third pair of rollers disposed oppositely with intermediation of said material to be rolled, axes of the rollers of the third air being 45.degree. inclined to those of the rollers of the first and the second pairs;
and a fourth pair of rollers disposed oppositely with intermediation of said material to be further rolled at a same position as that of the rollers of the third pair in the longitudinal direction of said material, axes of the rollers of the rollers of the fourth pair being perpendicular to the axes of the rollers of the third pair;
the third and the fourth pair of the rollers simultaneously rolling said material to be rolled at the same point in the longitudinal direction of the material;
(C) a housing block in which the front four rollers and the back four rollers are installed within a sufficiently small distance that no guide is necessary therebetween and so that said material being rolled is directly passed from the front four rollers to the back four rollers;
and
(D) driving means for driving the eight rollers, the driving means having a single main driving source for driving one roller of the front four rollers thereby rolling said material to be rolled, and smaller driving forces, which are smaller than the main driving source, for driving the remaining three rollers of the front four rollers and all the four rollers of the back four rollers, so that the remaining three rollers of the front four rollers and all the four rollers of the back four rollers idle rotate in the same rotating direction as that under rolling, prior to engagement of said material to be rolled by the rollers.

6 more elements

An eight-roller type rolling mill comprising:

(A) front four rollers comprising a first pair of rollers disposed oppositely with intermediation of a material to be rolled, axes of the rollers of the first pair being parallel, and a second pair of rollers disposed oppositely with intermediation of said material to be rolled at a same position as that of the rollers of the first pair in a longitudinal direction of said material to be rolled, axes of the rollers of the second pair being perpendicular to the axes of the rollers of the first pair;
the first and the second pair of the rollers simultaneously rolling said material to be rolled at the same point in the longitudinal direction of the material;
(B) back four rollers installed in the down stream of the material being rolled comprising a third pair of rollers disposed oppositely with intermediation of said material to be rolled, axes of the rollers of the third pair being 45.degree. inclined to those of the rollers of the first and the second pairs;
and a fourth pair of rollers disposed oppositely with intermediation of said material to be further rolled at a same position as that of the rollers of the third pair in the longitudinal direction of said material, axes of the rollers of the rollers of the fourth pair being perpendicular to the axes of the rollers of the third pair;
the third and the fourth pair of the rollers simultaneously rolling said material to be rolled at the same point in the longitudinal direction of the material;
and
(C) a housing block in which the front four rollers and the back four rollers are installed within a sufficiently small distance that no guide is necessary therebetween and so that said material being rolled is directly passed from the front four rollers to the back four rollers;
wherein two of the front four rollers have a diameter larger than a diameter of the other two front four rollers, and the rolling mill includes a single driving means for driving the eight rollers, the driving means having a main drive force only driving one of the larger rollers of the front four rollers and thereby rolling said material to be rolled, and the remaining three rollers of the front four rollers and all the four rollers of the back four rollers are free rotating so that the free rotating rollers rotate following advance of said material to be rolled.

5 more elements

Dependencies are inferred from the claim text.

Facts

Application: 09/156,655Filed 18 Sep 1998 · continuation
Priority: JP 7-33785530 Nov 1995
Granted: 11 Jul 2000
Term ends: Not estimatedThe source records don’t support an estimate.

Classification8 codes

B21B 35/04
For continuously-operating mills: each stand having its own motor or motors
B21B 1/18
For rolling wire rods, bars, merchant bars, rounds wire or material of like small cross-section: in a continuous process
B21B 13/12
With differently-directed roll axes, e.g. for the so-called "universal" rolling process: axes being arranged in different planes
B21B 13/005
Metal-rolling stands, i.e. an assembly composed of a stand frame, rolls, and accessories: cantilevered roll stands

Family

Serial757,879Parent of this continuation · filed 27 Nov 1996
US 6,085,565 AThis patent

From the US filing history. Foreign family members aren’t listed.

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Abstract

An eight-roller type rolling mill comprising:

(A) front four rollers comprising a first pair of rollers disposed oppositely with intermediation of a material to be rolled, axes of the rollers of the first pair being parallel;
and a second pair of rollers disposed oppositely with intermediation of said material to be rolled at a same position as that of the rollers of the first pair in a longitudinal direction of said material to be rolled, axes of the rollers of the second pair being perpendicular to the axes of the rollers of the first pair, the first and the second pair of the rollers simultaneously rolling said material to be rolled at the same point in the longitudinal direction of the material;
(B) back four rollers installed in the down stream of the material being rolled comprising a third pair of rollers disposed oppositely with intermediation of said material to be rolled, axes of the rollers of the third pair being 45.degree. inclined to those of the rollers of the first and the second pairs;
and a fourth pair of rollers disposed oppositely with intermediation of said material to be further rolled at a same position as that of the rollers of the third pair in the longitudinal direction of said material, axes of the rollers of the rollers of the fourth pair being perpendicular to the axes of the rollers of the third pair;
the third and the fourth pair of the rollers simultaneously rolling said material to be rolled at the same point in the longitudinal direction of the material;
and
(C) a housing block in which the front four rollers and the back four rollers are installed within a sufficiently small distance that no guide is necessary therebetween and so that said material being rolled is directly passed from the front four rollers to the back four rollers;
wherein only one driving source is provided as a driving source for the rollers at rolling of said material to be rolled;
the driving source drives any one roller of the front four rollers, and the remaining three rollers of the front four rollers and all the four rollers of the back four rollers are kept substantially fee rotating so that the free rotating rollers may rotate following advance of said material to be rolled.

6 more elements

Facts

Application

09/156,655Filed 18 Sep 1998 · continuation

Priority

JP 7-33785530 Nov 1995

Granted

11 Jul 2000

Term ends

Not estimatedThe source records don’t support an estimate.

Classification8 codes

B21B 35/04
For continuously-operating mills: each stand having its own motor or motors
B21B 1/18
For rolling wire rods, bars, merchant bars, rounds wire or material of like small cross-section: in a continuous process
B21B 13/12
With differently-directed roll axes, e.g. for the so-called "universal" rolling process: axes being arranged in different planes
B21B 13/005
Metal-rolling stands, i.e. an assembly composed of a stand frame, rolls, and accessories: cantilevered roll stands