JPH03174908A - Inner housing type rolling mill with plural rolls - Google Patents

Abstract

PURPOSE:To easily and quickly perform on-line roll change by providing inner housings inside frames and providing guides with which roll chocks which are separated from draft adjusting devices are supported within those housing. CONSTITUTION:In a rolling mill with plural rolls, the inner housings 11 are provided in the frames 6 so as to be attachable and detachable and to enable to be integrated with the frames 6 by sliding in the direction of pass line. And, within those inner housings 11, the guides 9 with which roll chocks 7 which are connected to the draft adjusting devices 10 in freely attachably and detachably are supported in freely movably forwards and backwards toward the pass line L are provided. In the case of roll change, the connection of the roll chocks 7 with the draft adjusting devices 10 is disconnected and roll units can be easily taken out by drawing the inner housings 11 out of the frames 6. Next, by setting spare inner housings 11' within which roll units are housed inside the frames 6 in inverse process, on-line roll change is easily and quickly done.

Description

[Detailed Description of the Invention] <Industrial Application Field> This invention is applicable to a
The present invention relates to a multi-roll rolling mill such as a single-roll rotary rolling mill.

<Prior art> A 30-mill type rotary rolling mill 1 is shown in FIGS. 18 to 2.
As shown in Fig. 1, three rolls 2 are arranged at equal intervals in the circumferential direction around the workpiece W to be rolled, with the roll center axis C along the pass line L, and the input of the rolls 2 is By relatively moving the side roll chock and the exit roll chock, the roll center axis C is inclined with respect to the pass line L, and the roll 2 is rotated by the electric motor 3, reduction gear 4, and universal joint 5, and the steel bar etc. Rolling is performed while rotating and feeding.

Conventionally, as shown in FIGS. 14 to 17, such a rolling mill has a rotary frame 6B rotatably provided inside the entrance side of the fixed frame 6A in the pass line direction, and the fixed frame 6A and the rotary frame 6B are connected to each other. Each fixed side roll chock 7A.

Install the rotating side roll chock 7B and fix the fixed frame roll A.
The rotary frame 6B is rotated by a hydraulic cylinder 8 attached to the rotary frame 6B, so that the roll center axis c is inclined with respect to the pass line L.

Roll chocks 7A and 7B are guides 9A.

9B supports the pass line L so that it can move forward and backward,
It is attached to a fixed frame 6A and a rotating frame 6B via reduction adjustment devices 10A and 10B consisting of a screw rod and a hydraulic cylinder. In addition, roll chock 7A
, 7B has a structure in which the roll shaft is supported by a spherical surface and a spherical bearing, and an increase in the distance between the bearings due to the inclination is absorbed by the end of the roll shaft which is slidable on the rotating side bearing.

<Problems to be Solved by the Invention> In the rolling mill structure as described above, when replacing the rolls, there is a main body replacement method in which the main body stand assembly is replaced online each time the rolls are replaced, or a main body is moved offline at the time of roll replacement. , a main body shift type in which the rolls are replaced off-line has been adopted, but because the structure is relatively complex, both methods have had the problem that the ξ roll is stopped for a very long time during roll replacement. Additionally, large wheels have the problem of not being easy to replace or shift the main body.

This invention was made to solve the above-mentioned problems, and its purpose is to provide a multi-roll rolling mill that can easily and quickly change rolls online without moving the main body. be.

Means for Solving the Problems> As shown in FIGS. 1 to 3, the present invention provides a plurality of rolls 2 arranged around a material to be rolled W at intervals in the circumferential direction. The pass line L is adjusted by the reduction adjustment device 10.
In a multi-roll rolling mill that is attached to a frame 6 so as to be movable toward the pass line, an inner housing 11 is provided on the frame 6 so as to be detachable by sliding in the pass line direction and to be integrated with the frame 6. A guide 9 is provided within the roll chock 11 to support the roll chock 7, which is detachably connected to the reduction adjustment device 10, so as to be movable forward and backward toward the pass line L.

<Function> The roll unit (roll 2 and roll chock 7) can be easily taken out from the frame 6 by disconnecting the roll chock 7 and the rolling down adjustment device 10 and pulling out the inner housing 11 from the frame 6.

By setting the spare inner housing 11° in which the roll unit is housed in the frame 6 in the reverse order, the roll can be replaced easily and quickly online.

<Example> The present invention will be described below based on an illustrative example. This is an example of a 30-mill type rotary rolling mill for billets, and the same reference numerals are given to parts that are the same as or correspond to conventional ones.

As shown in FIGS. 1 to 3, on the entrance side of the fixed frame 6A fixed to the base 13, a substantially ring-shaped rotating frame 6B is mounted on the entrance side of the fixed frame 6A fixed to the base 13, using roller bearings 14 as the center of the pass line L. The fixed frame 6A is installed in a rotatable manner and is rotatable relative to the fixed frame 6A by a hydraulic cylinder (not shown). Inner housing IIA is located inside the rotating frame 6B.

11B are provided respectively.

The inner housings 11A, 11B have an outer diameter that can be fitted into the fixed frame 6A and the rotating frame 6B, and have a large number of fixed paths spaced apart in the circumferential direction, as shown in FIGS. 4 to 6. Line direction guide key 15A
, 15B, it can be slid on and removed from the fixed frame 6A and the rotating frame 6B in the pass line direction, and can be positioned and fixed in the circumferential direction.

Further, the contact ends of the inner housings IA and IB are connected by a connecting plate 16 so that they can be pulled out and inserted as one unit. As shown in FIG. 4, this connecting plate 16 is buried so as not to protrude from the outer surfaces of the inner housings IIA and IIB, and
The rotating inner housing 11B is fixed in the pass line direction by the hook-shaped end and can be rotated together with the rotating frame 6B.

Furthermore, the inner housings IIA and IIB are inserted from the opposite side of the drive system of the roll 2, and for positioning at the time of insertion, a locking step 17 is provided on the stationary side inner housing IIA (see Fig. 4). , and an inner housing clamp device 1 for positioning and fixing the stationary inner housing IIA in the pass line direction so that the inner housings 11A and IIB do not move in the pass line direction after insertion.
2 is provided on the fixed frame 6A (see FIG. 3).

This inner housing clamp device 12 is disposed between the fixed side pressure adjustment devices 10A, and is vertically attached to the drive system side end of the fixed frame 6A via a support bracket 18, as shown in FIGS. 7 and 8. a hydraulic cylinder 19, and a guide member 2 which is pivotally attached to the lower end of the piston shaft of the hydraulic cylinder 19 and is slidably supported within the fixed frame 6A.
0, and a locking protrusion 21 that is integrally provided at the lower end of the guide member 20 and has an inclined surface 21a that narrows downward toward the drive system. By inserting the fixed side inner housing IIA into the locking hole 22, the fixed side inner housing IIA is attached to the fixed frame 6A.
Position and fix.

The fixed inner housing IIA is connected to the inner housing clamp device 12 and the fixed guide key 15A.
The rotating side inner housing IIB is fixed to the fixed frame 6A in the pass line direction and the circumferential direction by the inner housing clamping device 12.
6 to the fixed frame 6A only in the pass line direction, and is fixed to the rotating frame 6B by the rotation side guide key 15B so that it can rotate.

As shown in Figures 1 to 3, the roll chock 7A
The guides 9A and 9B that support the guides 9A and 9B such that they can move forward and backward with respect to the pass line L have the same structure as the conventional ones, and the guides 9A and 9B, which have a guide plate 24 attached to a substantially V-shaped base 23, are attached to the inner housing IIA, Provided integrally inside IIB.

The reduction adjustment device 10A and IOB are screw rods 2 which are rotatably driven by a worm and a worm wheel as in the past.
5, a pull pack cylinder 26 for removing backlash, a fixed frame 6A, and a rotating frame 6.
The screw rods 25A, 25B and the roll chocks 7A, 7B are brought into contact with the spherical seats 27, and the pullback cylinders 26A, 2
6B and the roll chocks 7A, 7B are removably connected to each other by relatively moving in the pass line direction by a protrusion 28 and a dovetail groove 29 at the tip of the piston shaft.

Further, the exchange device shown in FIGS. 9 to 11 is used to pull out and insert the inner housings IIA and IIB. This exchange device connects the pass line L from the opposite drive system side.
The guide bar 30 inserted along the guide bar 3
The guide bar 30 is inserted into the center of the inner housing IIA, IIB using an appropriate moving/supporting means, and the hydraulic jack 31A is installed at a position corresponding to the roll chocks 7A, 7B.
, 31B press and fix the roll chocks 7A, 7B. Note that this hydraulic cylinder 31A,
31B are arranged at equal intervals in the circumferential direction in correspondence with the roll chocks 7A and 7B.

Further, as shown in FIGS. 12 and 13, a housing exchange cart 33 that runs perpendicular to the entrance table 32 is provided on the entrance side of the rolling mill, and an inner housing drawer space 34 is provided on this cart 33. At the same time, the spare inner housing 11 is inserted through the spare stand entrance table 35.
Set up ゛.

In the above configuration, the operation is as follows.

(i) When pulling out the old roll unit, screw rods 25A and 25B into inner housings IIA and I
Move outside of IB.

(ii) While removing the locking protrusion 21 of the inner housing clamp W12 from the locking hole 22, the guide bar 30
Insert into the center of the inner housing from the side opposite to the drive system, and tighten the hydraulic jack 31A.

31B presses the roll chocks 7A and 7B.

(ii) The roll chocks 7A and 7B are in contact with the inner periphery of the inner housing and are prevented from moving outward.
It is pressed and fixed by hydraulic jacks 31A and 31B, and by pulling out the guide bar 30, the inner housing IIA
, IIB are pulled out from within the frames 6A and 6B together with the roll unit onto the exchange cart 33.

(iv) Replace the spare inner housing 11' with the new roll unit set from the guide bar 3 on the trolley 33.
0 to insert into frames 6A and 6B. The spare inner housing 11 is inserted by aligning the guide keys 15A and 15B positions, the text part 28, and the dovetail groove 29, and when stopped by the locking step part 17, is fixed by the inner housing clamp device 12. Next, roll chock 7A
, 7B and the screw rods 25A, 25B with the spherical seat 27
When the rollers come into contact with each other, the roll exchange is completed.

Although the above description has been made regarding a 30-wheel type rotary rolling mill, the present invention is not limited to this, and the present invention can be applied to other rolling mills in which a plurality of rolls are attached to a frame via a rolling reduction adjustment device.

<Effects of the Invention> As described above, the multi-roll rolling mill according to the present invention includes an inner housing provided inside the frame, a guide provided in the inner housing for supporting the roll chock to be separated from the rolling adjustment device, and a roll unit. Since the inner housing can be replaced together with the inner housing, roll replacement can be quickly performed online, and roll replacement can be significantly shortened. Further, since the roll chocks are simply uncoupled, rolls can be replaced extremely easily even in large mills.

[Brief explanation of drawings]

Fig. 1 is a cross-sectional view showing a 30-hole rotary rolling mill according to the present invention, Figs. 2 and 3 are cross-sectional views taken along the line ■-■ in Fig. 1, and Fig. 4 is a cross-sectional view taken along the line ■-■. A sectional view showing the inner housing and roll unit according to the present invention, FIG.
Figure 6 is a cross-sectional view taken along the line V-V and VI-VI in Figure 4, Figures 7 and 8 are side and front views showing the inner housing clamp device, and Figure 9 is a replacement device. cross section,
Figures 10 and 11 are cross-sectional views taken along the line X-X in Figure 9;
12 and 13 are a plan view and side view showing a mill layout according to the present invention, FIG. 14 is a schematic sectional view showing a conventional example, and FIGS. 15 and 16 are FIG. X of
17 is a plan view showing the inclination of the rolls, FIGS. 18 and 19 are a plan view and side view schematically showing a conventional rolling line, FIG. 21 is a schematic front view and a schematic plan view showing the arrangement of the rolls. 1...30 single type rotary rolling machine 2...Roll, 3...Electric motor 4...Reducer, 5...Universal joint 6A...Fixed frame, 6B...Rotating frame 7
A... Fixed side roll chock 7B... Rotating side roll chock 8... Hydraulic cylinder 9A... Fixed side guide, 9B... Rotating side guide 1
0A...Fixed side pressure adjustment device 10B...Rotating side pressure adjustment device 11A...Fixed side inner housing 11B...Rotating side inner housing 12...Inner housing clamp device 15A...Fixed side guide key 158 B... Rotation side guide key 16... Connection plate, 17... Locking step portion 19...
...Hydraulic cylinder, 20...Guide member 21...
Locking protrusion, 22... Locking hole 23... Base,
24...Guide plate 25...Screw rond 26...Pullback cylinder 27...Spherical seat, 28...Protrusion 29...
Dovetail groove, 30... Guide bar 31... Hydraulic jack Fig. 5 Fig. 8 Fig. 9 Fig. 1

Claims (1)

[Claims] (1) A multi-roll rolling mill in which a plurality of rolls are arranged around the material to be rolled at intervals in the circumferential direction, and the rolls are attached to a frame so as to be movable toward the pass line by means of a rolling reduction adjustment device, as described above. An inner housing is provided on the frame so that it can be attached and detached by sliding in the direction of the pass line and can be integrated with the frame, and within this inner housing, a roll chock that is detachably connected to the reduction adjustment device is moved back and forth toward the pass line. An inner housing type multi-roll rolling mill characterized by having a guide that supports freely.