JPH0446613A - Device for cooling roll on rolling mill - Google Patents

Abstract

PURPOSE:To make the cooling header to follow to the fluctuation of upward and downward of the work roll by supporting the roll cooling device body at the above elevating/descending frame in freely approaching and separating against the work roll, and making the roll cooling device body to move against the work roll in freely approaching and separating. CONSTITUTION:The guides 68, 69 for adjusting the interval which extend to the feeding direction 28 are set under the supporting members of both ends of the upper and lower elevating/ descending frames 49, 50, the roll cooling device body 70, 71 extending parallel with the work roll 20 are fit in and supported between this guides 68, 69 for adjusting the interval with the guide parts for adjusting the interval which are formed at both ends of the roll cooling device bodies 70, 71 so as to be freely movable to the feeding direction 28 against the above guides 68, 69 for adjusting the interval. And the devices 74, 75 for adjusting the interval of the wormjack, etc., under the elevating/descending frames 49, 50, and the top end of the driving shafts 76, 77 of the worm-screw, etc., extending to the work roll 20 side of the devices 74, 75 for adjusting the interval are connected at the roll cooling devices 70, 71 through the rotary fittings 78, 79. To cool the roll can be executed without trouble in the rolling by elevating/descending the upper roll cooling device body 70 following to the elevating/descending movement of the work roll 20 of the upper side.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a roll cooling device for a rolling mill.

[Prior Art] Conventionally, as a roll cooling device for a rolling mill, a spray type device that injects a cooling liquid directly onto the rolls has been used.

However, in spray-type roll cooling devices, the sprayed coolant may reflect on the roll surface, or the sprayed coolant may interfere with each other, or the sprayed coolant may interfere with the coolant reflected on the roll surface. Therefore, the cooling capacity was low.

However, in recent years, due to the interconnection of continuous casting equipment and rolling equipment, the thermal load on rolls has tended to increase, and roll cooling equipment with high cooling capacity has been required. It's here.

Therefore, for example, as described in Japanese Utility Model Application Publication No. 59-16210fli, a roll cooling device has been proposed in which the cooling capacity is increased by flowing a cooling liquid in a laminar flow over the surface of the roll. .

Hereinafter, a conventional rolling mill roll cooling device will be explained using FIG. 8.

In the figure, 1 is a work roll of a rolling mill, 2 is a backup roll, and 3 is a rolled material.

A frame 4 is provided in a housing of a rolling mill (not shown) in close proximity to the work roll 1, and brackets 5 are provided on the work roll 1 side of the frame 4 and near both ends of the work roll 1, respectively.

Between the brackets 5 is a support shaft B parallel to the work roll 1.
The center portion of a dogleg-shaped arm 7 is rotatably pivoted through the arm 7, and a counterweight 8 is fixed to the upper end portion of the arm 7.

On the other hand, a guide plate 9 having a curvature approximately equal to that of the work roll 1 is provided so as to face the surface of the work roll 1 with a small distance S, and the supply side has a slit IO parallel to the work roll l facing the work roll 1. A header part 11 is provided at the lower part of the guide plate 9, and a collection side header part 13 having a slit 12 parallel to the work roll 1 toward the work roll l is provided at the upper part of the guide plate 9.
A cooling header 15 is configured by providing a seal member 14 that surrounds the supply header portion 11 and the recovery header portion 13 and contacts the surface of the work roll 1 to form a liquid-tight space therebetween.

A holding piece 17 attached to the side of the cooling header 15 opposite to the work roll I is rotatably attached to the lower end of the arm 7 via a fulcrum pin 16 parallel to the work roll 1.

Incidentally, reference numeral 18 denotes a draining plate whose rear end is fixed to the frame 4 and whose tip is brought into contact with a portion below the contact position of the cooling header 15 of the work roll I.

The counterweight 8 urges the tip of the arm 7 to rotate upward about the support shaft 6, and the cooling header 15 is pivotally connected to the tip of the arm 7 via a fulcrum pin 16. It is pressed against the surface of the work roll ■.

In this state, the cooling liquid is supplied from the slit 10 of the supply side header part 11 to the space S between the work roll 1 and the guide plate 9, and after flowing the cooling liquid in a layered manner in the space S, the cooling liquid is poured from the slit 12. The work roll 1 is cooled by being collected into the recovery side header part 13.

[Problems to be Solved by the Invention] However, the above conventional rolling mill roll cooling device has the following problems.

That is, the position of the work roll 11, especially the upper work roll 1, fluctuates up and down due to disturbances such as changes in plate thickness during rolling, but the cooling header 15 is connected to the arm 7 on the frame 4 fixed to the housing of the rolling mill. Since it is simply attached to the work roll l so that it can move toward and away from the work roll l, it is possible to replace the work roll l with one of a different diameter. I was unable to make them follow suit.

Therefore, it was difficult to actually use it for cooling the work roll 1 during rolling.

SUMMARY OF THE INVENTION In view of the above-mentioned circumstances, an object of the present invention is to provide a roll cooling device for a rolling mill that can support a cooling header so as to follow the vertical movement of a work roll.

[Means for Solving the Problems] The present invention provides an elevating frame that can be raised and lowered integrally with a work roll, and a roll cooling device main body having a cooling pad having approximately the same curvature as the work roll on the work roll side is attached to the elevating frame. Rolling characterized by supporting the work roll so that it can move toward and away from the work roll, and further comprising a distance adjusting device that moves the roll cooling device main body toward and away from the work roll between the roll cooling device main body and the lifting frame. This is related to the roll cooling device of the machine.

[Function] According to the present invention, by supplying cooling water between the cooling pad of the roll cooling device main body and the work roll surface,
Cooling water flows over the work roll surface in a layered manner to efficiently cool the work roll.

By moving the roll cooling device main body toward or away from the work roll using the spacing adjustment device, it is possible to accommodate work rolls with different diameters.

Since the roll cooling device main body is supported by an elevating frame that can be raised and lowered together with the work roll, the roll cooling device main body also moves up and down as the work roll moves up and down.

[Example] Embodiments of the present invention will be described below with reference to the drawings.

1 to 6 show an embodiment of the present invention.

In the figure, 19 is the housing of the rolling mill, 20 is the work roll of the rolling mill, 21 is the backup roll, 22 is the axle box of the work roll 20, 23 is the axle box of the backup roll 21,
24 is the housing 19 and the upper backup roll 21
a hydraulic reduction cylinder 25 provided between the axle box 23 and the axle box 23;
26 is a balance beam that urges the axle box 23 of the upper backup roll 21 upward by a counter balance cylinder (not shown) provided in the housing 19; 26 is a balance beam provided between the housing 19 and the axle box 22 of the work roll 20; Shift guide part 27 is the axle box 2 of the work roll 20
2 and the shift guide part 26, 28 is a feeding direction of the rolled material, 29 is a pass line for the rolled material, 30 is a work roll exchange rail, and 31 is provided on the exit side of the rolling mill. It is a looper.

As shown in FIG. 4, a pair of left and right attachment/detachment parts are provided with a guide portion 32 located on the exit side of the rolled material feed direction 28 of the housing 19 and above the pass line 29, and which moves upward as it goes toward the exit side of the feed direction 28. A guide body 33 is provided, and a detachable frame 35 extending parallel to the work roll 20 is installed between the detachable guide bodies 33 as shown in FIG.
Guide portions 34 formed at both ends of the guide portion 32 are fitted and supported in a detachable manner to the guide portion 32 .

As shown in FIG. 1, a dogleg link 37 is pivotally mounted above the attachment/detachment guide body 33 of the housing 19 via a horizontal shaft 3B, and the lower end of the dogleg link 37 is pivoted so as to be vertically rotatable. and the detachable frame 35 are connected via a small link 38, and a detachable cylinder 39 extending vertically is interposed between the upper end of the dogleg link 37 and the housing 19.

Furthermore, upper and lower threading guides 40 and 41 are integrally attached to the lower part of the detachable frame 35.

Similarly, as shown in FIG. 4, a pair of left and right attachment/detachment guide bodies 43 have a guide portion 42 extending in the feed direction 28 at a position on the exit side of the rolled material feed direction 28 of the housing 19 and below the pass line 29. As shown in FIG. 3, a detachable frame 45 extending parallel to the work roll 20 is provided between the detachable guide bodies 43, and a guide portion 44 formed at both ends of the detachable frame 45 is provided with a guide portion 44 extending parallel to the work roll 20, as shown in FIG. It is fitted and supported so that it can be attached and detached freely.

An attaching/detachable cylinder 46 extending in the feeding direction 28 is interposed between the attaching/detachable guide body 43 and the detachable frame 45.

Upper and lower removable frames 35. 45 Work rolls 20 on both ends
As shown in FIG. 2, FIG. 3, and FIG. The elevating frame 49.50 extends from the elevating frame 49.
．． Guide portions 51.52 formed at both ends of the guide portion 50 are fitted and supported with respect to the elevating guide portions 47.48 so as to be movable up and down.

A vertically extending arm 53 is provided between the upper elevating frame 49 and the balance beam 25, and between the lower elevating frame 50 and the downwardly extending arm 53 provided on the lower detachable frame 45. Locked state release cylinder 5
4.55 is inserted.

On the other hand, as shown in FIGS. 2, 3, and 6, support members 56, 57 and 5 extend toward the work roll 20 at both ends and intermediate portions of the upper and lower lifting frames 49, 50, respectively.
8.59 are provided protrudingly, and the support members 56, 57 and 58
．． 59 allows a telescopic locking device 64° 65, which is formed by integrating a locking cylinder rod 0.61 parallel to the work roll 20 and a locking pin 62° 63, to be freely movable in the axial direction of the work roll 20. A locking device such as a hook that penetrates and supports the shaft box 22 of the work roll 20 and locks both ends of the locking device 64 and 65 from below and releases from the top or side. Member 66.67
will be established.

Upper and lower lifting frames 49.50 Support members 58 at both ends
．． Interval adjustment guide 8 extending in the feed direction 28 at the bottom of 58
8.89 is provided, and between the interval adjustment guides 68° and 69,
A roll cooling device main body 7 extending parallel to the work roll 20
0.71 are fitted and supported so that the interval adjustment guide parts 72 and 73 formed at both ends of the roll cooling device main body 70 and 71 are movable in the feeding direction 28 relative to the interval adjustment guides 68 and 69. do.

Then, a distance adjustment device 74.75 such as a worm jack is attached to the lower part of the lifting frame 49.50, and the tip of a drive shaft 78.77 such as a worm screw extending toward the work roll 20 side of the distance adjustment device 74.75 is connected to the rotary joint 78.
．． 79 to the roll cooling device main body 70.71.

The roll cooling device main body 70.71 includes a cooling liquid chamber 80.81, and a narrow cylindrical cooling space 82 fixed to the cooling liquid chamber 80.81 on one side and extending along the surface of the work roll 20 on the other side. .83, a cylindrical surface 84.85 with a curvature approximately equal to or slightly larger than that of the work roll 20 is formed, and a cooling liquid chamber 8 is provided inside.
A cooling pad 88,89 formed with a slit-shaped coolant supply path 86,87 parallel to the work roll 20 that communicates between the cylindrical surface 84 and 85, and the coolant chamber 8.
0.81 and a cooling liquid supply pipe 90.91 for supplying cooling liquid.

A distance detector 92.93 is attached to the cooling pad 88.89 to detect the distance formed between the cooling pad 88.89 and the work roll 20, and the distance is adjusted by the detection signal from the distance detector 92.93. Devices 74, 75 are controlled to maintain a small distance between cooling pads 88, 89 and work roll 20.

Next, the effect will be explained.

Coolant supply pipe 90.91 to coolant chamber 80°8
When the coolant is supplied to the coolant chamber 8, the coolant flows into the coolant chamber 8.
0.81 to the narrow cylindrical cooling space 82.83 formed between the cooling pad 88.89 and the work roll 20 through the cooling liquid supply path 86.87 formed in the cooling pad 88.89. The liquid is sent out, flows in a laminar flow over the surface of the work roll 20, and cools the work roll 20. In this way, by cooling the work roll 20 with the laminar cooling liquid, a high cooling capacity for the work roll 20 can be obtained.

When a disturbance such as a change in the thickness of the rolled material occurs during rolling, the upper work roll 20 moves up and down, or in the present invention, the upper elevating frame 49 is moved between the guide part 51 and the elevating guide part 47.
Since it is fitted and supported to the detachable frame 35 so as to be able to rise and fall freely, the lock can be released by releasing pressure from the pressure chamber of the lock release cylinder 54 provided between the lift frame 49 and the detachable frame 35. The upper lifting frame 49, which is locked to the axle box 22 of the work roll 20 via the device 64 and the locking member 66, moves up and down following the vertical movement of the upper work roll 20, and therefore the lifting frame 49 The supported upper roll cooling device main body 70 is the upper work roll 2
It moves up and down following the up and down movement of 0. In this way, by moving the upper roll cooling device main body 70 up and down following the up and down movement of the upper work roll 20, the work roll 20 can be cooled without any trouble during rolling.

At this time, the distance detector 92°9 is attached to the cooling pad 88.89.
3 is installed to detect the distance between the cooling pad 88.89 and the work roll 20, and the distance adjustment device 74.75 is controlled by the detection signal from the distance detector 92.93, and the distance between the cooling pad 88.89 and the work roll 20 is detected. Since the distance between the workpiece and the roll 20 is maintained at a small distance, a high cooling capacity can be maintained at all times, and even when the workpiece roll 20 is replaced with one of a different diameter, it is automatically cooled. It is possible to respond to this.

Moreover, when shifting the work roll 20 in the axial direction,
The locking devices 64 and 65 on the lifting frame 49.50 side are supported by the support members 5G, 57, 58.59 so as to be movable in the axial direction, so even if the work roll 20 is shifted in the axial direction, the locking devices 64 and 65 are not locked. Locking device 64°65 and locking member 6
B, [The locking device 64. while keeping the locked state of li7.
65 and support members 56.57, 58.59 move relative to each other in the axial direction, and the roll cooling device main body 70.71
is kept in its original position.

When removing the roll cooling device from the rolling mill, the lifting frame 49 is
．． 50 and locking member 68.87 and locking device 84.
Release the wedged state with 65 and remove the upper attachment/detachment cylinder 39.
By extending and moving the dogleg link 37, the dogleg link 37 is rotated by a required angle counterclockwise in FIG. By pulling the frame 49 diagonally upward and to the right from the housing 19 and at the same time retracting the lower attachment/detachment cylinder 39, the elevating frame 50 along with the detachable frame 45 is moved to the housing 19 via the guide portion 44.42 and the attachment/detachment guide body 43. Make sure to pull it out to the right. At this time, by pulling out the upper detachable frame 35 diagonally upward and to the right from the housing 19, the upper detachable frame 35 can be removed from the rolling mill without interfering with the looper 31. Incidentally, when attaching a roll cooling device to a rolling mill, the above procedure is reversed.

FIG. 7 shows another embodiment of the present invention, in which the work roll 2
This embodiment has the same structure as the embodiment described above, except that it is applied to a rolling mill in which zero does not shift in the axial direction, and the same effects and effects can be obtained.

It should be noted that the present invention is not limited only to the above-described embodiments, and it goes without saying that various changes can be made without departing from the gist of the present invention.

[Effects of the Invention] As explained above, according to the roll cooling device for a rolling mill of the present invention, the main body of the roll cooling device is supported by an elevating frame that can be raised and lowered integrally with the work roll, so that vertical fluctuations of the work roll can be avoided. An excellent effect can be achieved in that the roll cooling device main body can be moved up and down following the roll cooling device.

[Brief explanation of drawings]

Fig. 1 is a side view of one embodiment of the present invention, Fig. 2 is a view taken from the ■-■ arrow in Fig. 1, Fig. 3 is a view taken from the ■■ arrow in Fig. 1, and Fig. 4 is a view taken from the Fig. 2. - IV-IV arrow view in Figure 3, Figure 5 is a v-■ arrow view in Figure 1, Figure 6 is a Vl-Vl arrow view in Figure 2, and Figure 7 is a view other than the present invention. FIG. 8 is a side view of the conventional example, which is similar to FIG. 2 of the embodiment. In the figure, 20 is a work roll, 49.50 is a lifting frame,
70.71 is the main body of the roll cooling device, 74.75 is the interval adjustment device, and 88.89 is the cooling pad.

Claims (1)

[Claims] 1) An elevating frame that can be raised and lowered integrally with the work roll is provided, and a roll cooling device main body having a cooling pad having approximately the same curvature as the work roll on the work roll side is supported on the elevating frame so as to be able to move toward and away from the work roll. A roll cooling device for a rolling mill, characterized in that a distance adjusting device for moving the roll cooling device main body toward and away from the work roll is provided between the roll cooling device main body and the elevating frame.