JPS5987911A - Work roll shifting device - Google Patents

Abstract

PURPOSE:To shift easily and surely a work roll in its axial direction, by interlocking and releasing one end of a screw shaft with and from the end of an extension arm provided to a roll chock of a work roll with the aid of a keeper plate. CONSTITUTION:Work rolls 5, 6 are respectively disposed freely slidably in the axial directions through roll chocks 9, and extension arms 17 extending to the directions of the axial ends are respectively provided to the roll chocks 9, and vertically interlocking grooves are provided to the ends of the arms 17. On the other hand, connecting parts 22 capable of being interlocked with the arms 17 ends are respectively provided to screw shafts 21 to make the shafts 21 movable in the axial directions by shift motors 26 through reducers. Further, keeper plates 32 are provided, which penetrate the connecting parts 22 and are capable of going into and out of the interlocking grooves of the arms 17 ends. Furthermore, bearing blocks 40 of spindles 38, for connecting the rolls 5, 6 and a roll driving device 37, and the side ends of nonconnecting parts 22 of the shafts 21 are connected through arms 36, shafts 35, and guide frames 25, therefore the spindles 38 can also follow up the shifts of the rolls 5, 6.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a work roll shifting device for shifting work rolls of a rolling mill in the roll axis direction.

In conventional general rolling mills, the work rolls usually do not shift in the roll axis direction. As a result, when rolling plates of the same width are successively rolled, the work roll (a) is worn by the width of the rolled plate (b)), forming a stepped portion (c), as shown in FIG. Therefore, if a wide rolled plate (h) is subsequently rolled after this, uneven thickness will occur in the rolled plate (h) due to the step (c) as shown by the imaginary line. .

Therefore, when rolling a wide rolled plate (b), it is necessary to replace the work roll (a) each time.
There is a problem in that the complicated operations, the stopping and adjustment of the rolling operation in between, require new redoing, and the resulting production of defective products. Therefore, as shown in FIG.
It is conceivable to average the amount of friction in the axial direction.

Furthermore, the work rolls are subject to significant wear and must be replaced frequently, but if the work rolls are shifted based on the above-mentioned principle, the work rolls will be difficult to engage and disengage from the device that shifts the rolls. must be easy and reliable in order to speed up the replacement work.

Currently, there is no concrete device that can shift work rolls (d) (C) by appropriate amounts, and the shifting devices currently proposed have drawbacks such as complex structure, high cost, and long-term implementation. There is.

In view of such circumstances, the present invention is configured such that one end of a shaft provided to be movable in the axial direction of the work roll and the end of an extension arm provided on the axle box of the work roll can be engaged with and separated from each other by a keeper plate. In addition, a downward engaging groove is provided at the end of the extension arm with which the keeper plate engages.

The present invention will be described in detail below with reference to FIGS. 3 and 4.

In the figure, (]) (2) are left and right clamps, (3) [
4) is "1 lower backup roll, (5) (Gl is -1
- Shows the lower workil.

Left and right housing (1) (2+ to 10- upper work roll (
5) A total of two pairs of upper and lower beams (7) facing each other.
) (J, the beam is not shown) is provided so that it can freely slide in the vertical direction, and the lower two pairs of beams (
Force the upper and lower work rolls (5) ((31) into the inner shaft box (8)
) (9) so as to be slidable in the axial direction of the work roll.

The following description will be made regarding the lower work roll (6) side, but the same applies to the upper work roll (5) side.

Axle box support frames (10) (I 1) are fixed to the outer surfaces of the left and right housings (Ll (2+), respectively, and both ends of the beam (7) are also slid in the vertical direction by the C marks on the support frames (10). The support frame (field (II))
The outer axle box (121 (131) of the lower work roll (6) from the non-drive side can be fitted respectively, and the axle box (+2) (+3+) on the I side is fitted with the clamp plate Q4).
The fixation can be released by moving the cylinder (15) in and out.

The inner axle boxes (8) and (9) each have an outer axle box (121).
(+31! [Arm extending outward through (1, G
) Q, 7), the left arm (16) is capable of engaging and disengaging with a roll changing device (not shown), and the right arm (17) has a tip in the opposite direction to the center axis of the work roll. An engagement groove (19) extending vertically is formed on the surface (in the longitudinal direction of the rolling line), and a screw/saw shaft (21) that can be inserted into the roll shift device B (20) (to be described later) is attached to the engagement groove (19). The connecting part (which can be engaged and disengaged).

Next, the roll shift device (20) will be explained.

The gate-shaped mounting frame (23) is attached to the support frame (
A pair of guide rails (24 are fixed to the outer surface of the mounting frame (2:a) symmetrically with respect to the axial extension line of the lower work roll (6), and A guide frame (1) is movably provided between the guide rails (24) (24).The guide frame (25) has a tip end portion of an Arno.0η whose one end extends from the inner axle box (9). While fixing the other end of the screwsha 7) (21) parallel to the work roll axis having a connection part (2) to the
A wheel nut (28), which rotates via a reducer (27), a worm (not shown), etc. driven by a shift motor (26), is screwed onto a part of the intermediate screw (2+) of the shirt (2+). (Remove the iron (--Store freely in the nut case (29) installed on the outer surface of the J frame (23) and screw shirt) (2
1) can be moved in the axial direction of the work roll along the rail (24+) via the guide frame (25) by driving the motor (2ii).
23), guide windows (30) are provided in the direction of the rolling line at opposing positions in the direction of the work roll axis, and a sliding block (3υ is fitted into each guard window (30), and a keeper play 1 which is fitted into the engagement groove at the distal end of the connecting portion (221) of the sliding block (31) and the screw shirt (21);
- (32) is provided so that it can be moved in and out by the operation of the cylinder (33).

Further, a shaft (3ω) is pivotally mounted to the center of the guide frame (25) at right angles to the work roll axis via a Brauts l-(34) (34), and a shaft (3m) is provided at both ends of the shaft (3m).
One end of each arm (3G) is fixed, and the arm (3G) is
In addition to i[i], W:Lj is attached to the bearing block ``jtsuk'' (40 ), and further fix one end of the arm (4I) to the center of the shaft (3), and attach the guide frame (2!i) to the other end of the arm (2! It is configured so that the rond end of the girder cylinder (42) can come into contact with it.

The above is the roll shift + for the lower + 7 - crawl (6) side
- Device n (20), the roll shift device (21) on the upper work roll (5) side also has substantially the same structure, so its explanation will be omitted.

Next, the operation of the roll shift device (20) will be explained, and roll replacement will be explained.

First, the screw shaft in the arm (17) on the work roll (6) side and the shift device fFlf (20)
Assuming that the two connecting parts (1) and the key plate (3) are connected, the shift motor (26)
When the worm is rotated by the Mu M machine (2 forces), each pole nut (28) rotates and synchronizes both screw shafts (2+) (21) in the axial direction:
move it to That is, both screw shafts (2]) (
21) moves, both screw shafts (2])
(2+) One end connecting part (22) Since the tip of the arm (17H17) is connected to (22) via the keeper plate (321), the arm (1 force (17) and the inner shaft box ( 9), the lower 1 no crawl roll (6) shifts.On the other hand, when the lower work roll (G) shifts, the spindle (38) also needs to shift, but the bearing block (40) of the spindle (38) The opposite end of the screw shaft (2) to the connecting part (22) is the end of the screw shaft (2])
G), shaft (35), bracket +341, and guide frame (25), so the spindle (3
8) can also follow the shift of the lower work roll (Gl). Since the spindle (38) moves to follow the lower work roll (6) in this way, another drive is required to shift the spindle (38). Equipment and lower work rolls (
6) It becomes unnecessary to attach and detach the end and the coupling (3!i) using a bottle. Incidentally, during the above-mentioned shift, the sliding flock (31) that holds the keeper plate (3) smoothly slides along the guide g (3G+) of the frame (23) in some cases.

For the upper work roll (51, lower work roll (6
) in the opposite direction to the roll shift of the lower work roll (6
) so that it moves by the same amount as the movement punch of J-.

'7-Role (5) roll shift device (20) Full configuration -, l-'F roll shift device (20)
+20) to perform a roll shift.

Here, the shift amount of −1−lower work roll (!”i+ It is easy to shift the roll by a minute amount. Therefore, the required amount of work is shifted by shifting the lower work roll (51 (6)) and shifting the upper and lower work rolls (5) (GJ The amount of wear in the axial direction can be averaged.

By the way, "1 lower work roll (51 (6)) has a plate thickness G
Correspondingly, the arm may be moved up and down to adjust the distance between the two, but in this case, the arm (key/brake) that engages with 021 (the engagement groove (+9) of 1η is in Because of the elongation, even if the lower work roll (51CG+ moves up and down, the keeper play) (321 moves up and down relative to the engagement groove a9), and the upper and lower work rolls (51 ( The spindle (38) tilts following the rise and fall of G), but even if the spindle (38) tilts, the bearing
The arm (3G) connected to the lock (40) rotates freely, and the one-goal shift device m (20) (20)
(c) This does not in any way impede the lifting and lowering operation of the upper and lower workpieces o-/1z (5) (6).

The next step is to explain how to exchange the second roll.

First, operate the cylinder (33) to pull out the key <-plate (321) from the engagement groove α0 of each arm (1η).
(Pull in l) - Lower work roll (5) (Remove the constraint in the axial direction of 61.

Subsequently, a roll exchange device (not shown) is engaged with the arm (1G) G, and the upper and lower work rolls (51 (61) are pulled out toward the opposite roll shift device (2 (]) (2i).

Regarding the incorporation of the 10F work role (51 (6))” 1
Just follow the withdrawal procedure in the reverse order.

In addition, please do as above”-lower work roll (5) (G
), if you pull out ``1 spind), then 31 ('l
is tilted downward, and when it is installed, the
/ +38) will have to be aligned, so at this time, extend the mouth of the cylinder (42) and press the arm (old) into contact with it.
), the position of the bearing block is held through the arm (3G), and the position of the spindle (C38) is held in place even after the lower work rolls (5) and (6) are pulled out. Ru.

Therefore, engagement and disengagement between the work roll and the roll shift device can be performed easily and reliably, and when the rolling mill is in operation, the arm 07) and the screw shaft (2I) are kept in a keeper position.
(Since they are connected by 321, the engagement relationship is extremely reliable.

According to the present invention, it is possible to provide a roll shift device that has a simple structure, can reliably shift rolls, and can easily manage the amount of shift.

(ii) Work roll 1lQh due to roll shift
Since the wear in the right direction can be made uniform, the usage time of the work roll can be extended.

(iN) A wide plate can be rolled after a narrow plate, saving the trouble of changing rolls.

Ov) Since the frequency of roll exchange can be reduced, productivity can be improved.

(v) Several types of tj-route/lift devices can be installed on the drive side of the work rolls, making it easy to replace the rolls, as well as ensuring that the rolls can be replaced quickly and reducing downtime of the rolling mill.

(Vl) Even when the work roll is raised and lowered, the roll shift device does not impair the IUI of the work roll.

(ViD Since the spindle follows the shift of the work roll, in order to shift the spindle, a separate drive device or the attachment and detachment of the pin between the work roll end and the spindle coupling, which is performed by an operator by turning to the drive side) is required. No more work required.

Demonstrates the effect of giving such things.

[Brief explanation of the drawing]

Fig. 1 is an explanatory diagram showing the worn state of a work roll without conventional roll shifting, Fig. 2 is an explanatory diagram showing the shift direction of the work roll, and Fig. 3 is a rolling diagram equipped with the work roll shifting device of the present invention. FIG. 4, a partial front view of the machine, is a view taken in the direction of arrow IV in FIG. 3. (5) (G)... Work roll, (8) (9)...
Inner shaft box, (17)...Arm, (19)...-Engagement (?h, C21)...Screw shaft, (221
・Connection part, (23)... Torii\J frame, (24)・
・・Guide rail't (25)・・Guide frame,
(2G+...Shift motor, (32...Keeper plate, (331-Cylinder) Special A1-Applicant Ishikawajima Harima Heavy Industries Co., Ltd.

Claims (1)

[Claims] I) The work roll is disposed so as to be slidable in the axial direction through an axle box, and the axle box is provided with an extension arm that extends toward the end of the work roll shaft, and the end of the extension arm is provided with an extension arm that extends in the vertical direction. A shaft is provided with an engagement groove and has a connecting portion that can be engaged with the end of the extension arm, the shaft can be moved in the axial direction by a required drive mechanism, and the connecting portion of the shaft A keeper plate that can be moved in and out of the engagement groove of the end of the extension arm through 1° 1 is provided, and an axle box of a power transmission spindle that connects the work roll and the work roll drive device is provided with the keeper plate. A work roll shift device Wl, characterized in that the spindle is connected to the opposite end of the shaft to the side opposite to the connecting portion, and is configured to move in accordance with the shift of the work rolls.