Hot rolled material take-up equipment and take-up method

Details Hot rolled material take-up equipment and take-up method Hot rolled material take-up equipment and take-up method

1998-10-29

2001-02-13

Butler, Rodney A. (Department: 3725)

Metal deforming

By use of roller or roller-like tool-element

Including tautening of work during deformation

C072S250000

Reexamination Certificate

active

06185971

ABSTRACT:

BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to take-up equipment and a take-up method for a finish rolling mill for dividing a strip into a plurality of coiled products when taking up the strip on the exit side of the finish rolling mill.
An object of dividing the strip at the exit side of the finish rolling mill is to split the strip, which is made from a slab having heavy individual weight, into several lighter coils to permit easier handling. Another object is to divide the strip at the exit side of the finish rolling mill in order to accommodate it to so-called endless rolling in hot rolling wherein a plurality of strips are joined at the entrance side of the finish rolling mill by connecting the trailing ends of preceding strips to the leading ends of following strips to perform nonstop rolling. The take-up equipment and the take-up method in accordance with the present invention can be applied to fulfill both objects described above.
2. Description of Related Art
FIG. 1
is a schematic diagram showing conventional take-up equipment. In conventional hot rolling, a single slab has been batch-rolled to produce a single coil. As illustrated in
FIG. 1
, a strip
22
leaving a last stand
21
of a finish rolling mill travels on table rollers
30
to be taken up by a take-up equipment constituted by pinch rolls
23
,
25
, and down coilers
24
,
26
so as to be finished as a coiled product. In this illustrated case, the two pinch rolls
23
,
25
and the two down coilers
24
,
26
alternately take up the strip.
Thus, the take-up equipment described above has been unable to handle divided materials that are taken up by dividing the strips at the exit side of a finish rolling mill or to take up an endless rolled material.
SUMMARY OF THE INVENTION
The present invention has been made with a view toward solving the problem described above. It is an object of the present invention to provide equipment and a method for taking up a hot-rolled material that make it possible to divide an uncut strip which has been rolled to a predetermined thickness at the exit side of a finish rolling mill and to take up the cut strips by a down coiler into a coiled product in taking up split materials or in taking up divided materials or in the endless hot rolling wherein a plurality of strips are joined and rolled. It is another object of the present invention to provide equipment and a method for taking up a hot-rolled material that permit a thin strip running fast to be taken up in a stable manner.
According to the present invention, there is provided equipment for taking up hot-rolled material, the equipment being equipped with: a plurality of take-up machines (
24
,
26
, K
1
, K
2
) disposed at a downstream side of a hot finish rolling mill; a shearing machine (
27
,
2
) provided on an upstream side of a pinch roll (
23
,
4
) of the take-up machines (
24
, K
1
) at the uppermost stream end; and a strip passing device (
28
,
6
a
) provided between the shearing machine and the pinch roll at the uppermost stream to prevent a strip from rising.
In a preferred embodiment of the present invention, a pinch roll (
1
) is provided at an entrance side end of the shearing machine (
2
), and strip passing devices (
82
,
83
) for preventing a strip from rising are provided between the pinch roll (
1
) and the shearing machine (
2
). Further, a strip passing device (
29
,
6
b
) for preventing a strip from rising is also provided between the plurality of take-up machines.
Further, a pinch roll (
3
) is provided near an exit side of the shearing machine (
2
) and a strip passing device (
84
) for preventing a strip from rising is provided between the pinch roll and the shearing machine. The upper pinch rolls of the foregoing pinch rolls (
23
,
25
,
1
,
3
,
4
,
5
) are adapted so that they can be moved toward or away from the lower ones by hydraulic cylinders. The strip passing devices (
28
,
29
,
82
,
83
,
84
) are guiding devices for restricting the rising height of a strip. Or, the strip passing devices (
28
,
29
,
6
a,
6
b
) are airflow suction type strip passing devices that draw in a strip under suction using airflow.
The constitution of the present invention described above can be applied also to a case where several coils are produced from a single strip or a case where a plurality of strips are joined and rolled in endless hot rolling in which the joined strip that has been rolled to a predetermined thickness at an exit side of a finish rolling mill is cut by a shearing machine provided on the upstream side of the pinch roll of a down coiler at the uppermost stream end, then the cut strips are taken up by a plurality of down coilers provided at the downstream side of the hot finish rolling mill thereby to produce coiled products.
In a preferred embodiment of the present invention, the plurality of take-up machines (K
1
, K
2
) are down coilers. A pinch roll (
4
) disposed on the entrance side of the coiler (K
1
) other than the down coilers at the lowermost stream end of a line is equipped with a changing means for altering the advancing direction of a strip.
In a further preferred embodiment, the plurality of take-up machines have carousel type reels, each having two take-up drums (
66
a,
66
b
). The take-up drum (
66
a
) located at a lowermost downstream portion of a pass line P is provided with a wrapper roll (
67
) while the other take-up drum (
66
b
) located off the pass line P is provided with a snubber roll (
68
) which holds a trailing end. A swing type strip passing device (
69
) for drawing a strip in under suction using airflow is disposed between the other take-up drum (
66
b
) and a pinch roll (
64
) positioned on the pass line P, and a strip trailing end guide (
70
) is provided between the downstream end of the strip passing device and the other take-up drum (
66
b
).
In a further preferred embodiment of the present invention, only the strip passing devices (
6
a,
6
b
) disposed immediately before the entrance sides of the respective take-up machines employ the airflow suction type strip passing devices that draw a strip in under suction using airflow.
Strip passing guides (
82
,
83
,
84
,
85
,
86
a,
86
b,
87
,
88
a,
88
b
) for guiding a strip along the pass line are provided above the pass line at the positions corresponding to points between the pinch rolls (
4
,
5
) disposed at the entrance sides of the take-up machines (K
1
, K
2
) and the airflow suction type strip passing devices (
6
a,
6
b
) disposed immediately before the entrance side thereof, between the airflow suction type strip passing device (
6
a
) and the pinch roll (
3
) disposed immediately before the entrance side thereof, and between the shearing machine (
2
) and the pinch rolls (
1
,
3
) disposed at the exit sides and entrance sides, respectively.
she Strip passing guides (
86
a,
86
b,
88
a,
88
b
) provided between the pinch rolls (
4
,
5
) disposed at the entrance sides of the take-up machines (K
1
, K
2
) and the airflow suction type strip passing devices (
6
a,
6
b
) disposed immediately before the entrance sides thereof are constituted by pinch roll introducing guides (
86
a,
88
a
) provided very closely to the pinch rolls (
4
,
5
) and top guides (
86
b,
88
b
) separate therefrom. When the airflow suction type strip passing devices are retracted from the pass line, the top guides are placed in a position between the airflow suction type strip passing devices and the pass line to guide the leading end of a strip to the pinch roll introducing guides. When the airflow suction type strip passing devices are rested in the vicinity of the pass line where they can be put in operation, the top guides are retracted to the position between the airflow suction type strip passing devices and the pinch rolls or to the position away from the pass line.
Further according to the present invention, there is provided a method for taking up a hot-rolled material wherein: strip passing devices (
86
a,
86
b,
88
a,
88
b
) at entrance sides of pinch r

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