JP2506412B2 - Entry side guiding device for cold rolling equipment - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an inlet side guide device for cold rolling equipment, and more particularly to an inlet side guide device suitable for a continuous / batch type cold tandem mill.

[Conventional technology]

As the cold rolling equipment, there are generally a batch type in which rolling is performed for each coil and a continuous type in which endless continuous strip is rolled. In batch mode, generally,
A strip tip biting device for forcibly biting the tip of the coil strip into the work roll of the rolling mill for each coil, and a backward tension applying device for imparting backward tension to the strip for stable rolling Is installed on the entrance side of the rolling mill. Further, also in the continuous type, generally, a rear tension imparting device is installed on the entrance side of the rolling mill in order to impart rear tension to the strip to perform stable rolling. However, since the strip is already provided with the backward tension in the upstream equipment on the inlet side of the rolling mill, the backward tension applying device that is stronger than the batch type is not required.

As a conventional strip tip biting device, Japanese Patent Publication No. 46-31
There is a belt type device as described in Japanese Patent No. 724, and a strong pressing device composed of wood chips and the like as described in Japanese Patent Laid-Open No. 54-101745.

Further, as a rear tension imparting device, there is a device described in JP-A-54-1017.
A plate pressing device that doubles as a rear tension applying device, which is also composed of a piece of wood described in No. 45, and Japanese Patent Publication No. 49-1794
There is a strip guide device composed of bridle rollers as described in No. 7.

Further, as described in JP-A-60-111713, a bridle unit as a backward tension applying device is provided as a device for both rolling of a rolling mill as described in JP-A-60-111713, which has both a strip tip biting function and a backward tension applying function. There is an entrance side guiding device that moves to the driving side.

[Problems to be Solved by the Invention]

As described above, the plate pressing device composed of a piece of wood or the like has a strip biting function and can give a strong rearward tension. On the other hand, the bridle roller type does not have a function of holding and pushing the strip because the roller rotates. Therefore, the bridle roller unit
It is used in a continuous mill, which is a facility that does not require the biting operation of the strip, and the plate pressing device is used in a batch coil tandem mill in which the biting operation of the strip and the application of backward tension are essential.

However, in a plate pressing device composed of wood pieces and the like, the wood pieces and a part of the synthetic resin used for this are heavily consumed and maintenance is difficult. There was a problem that it bites and this causes harmful damage to the product. For this reason, the roll gap is set from the beginning to a level that does not require the forced biting operation, and a rolling method that does not require the forced biting function but reduces the yield is adopted. There is also equipment that has been given.

On the other hand, in order to improve the productivity, it has been recently studied and implemented to improve the equipment of the conventional coil batch tandem mill to a continuous mill. However, in order to completely make a continuous mill, the equipment before and after that and several existing mills need to be remodeled significantly, and enormous equipment restructuring costs and long-term operation suspension are required. Therefore, there is a demand for a semi-continuous type mill that can be rolled only as a continuous mill in a time zone without changing rolls, and can be used for conventional batch coil rolling without changing the equipment before and after the mill. In this case, in a batch-type modification equipped with a plate pressing device composed of wood pieces or the like, the wood pieces or the like are consumed during the stay of the strips during the operation as a semi-continuous type, and it is necessary to replace them. Since it is extremely difficult to exchange wood chips, etc. while strips remain,
The above-mentioned consumption and maintenance of wood chips and the like and damage to the product are particularly problematic.

On the other hand, in order to rationalize productivity, a mill with a small diameter work roll that is thick and capable of strong reduction is desired, but with small-diameter work rolls, biteability becomes worse and The forced bite function has become indispensable for improving retention.

In view of the above background, an entrance side guiding device in a cold rolling mill as described in JP-A-60-111713 has been proposed. However, in this proposed device, the bridle unit can be moved to the drive side due to the limitation of the space such as the drive mechanism in many cases because of the existing facility arrangement. Therefore, there is a demand for an entrance-side guide device that has a biting function, has less scratches on the strip, requires less maintenance, can apply a backward tension suitable for a continuous mill, and can be installed in an existing space.

The purpose of the present invention is to forcefully bite a thick strip of material plate thickness to the work roll, and there is no scratch on the strip,
It is an object of the present invention to provide an entry-side guide device for cold rolling equipment, which can provide a long-life rearward tension application function and can be stored and installed in a conventional existing space.

[Means for solving the problem]

The above object is to install a guide frame inside the two housings on the operating side and the driving side, and to this guide frame, a strip pressing device including an upper movable pressing member and a lower fixed pressing member, and the strip pressing device. The guide frame can be horizontally moved in the strip path direction by mounting a roller unit that is arranged rearward in the strip path direction and is composed of a fixed roller and a movable roller that can move up and down individually and that also functions as a bridle roller. This is achieved by the entrance side guide device of the cold rolling facility characterized by being configured.

The guide frame is preferably further provided with a side including a plurality of rigid guide rollers arranged on both sides of the strip pressing device and means for adjusting and moving the rigid guide rollers in the strip width direction. Install the guide device.

Further, a clutch and a bearing, which have a large rotational resistance or cannot rotate in the rotation direction opposite to the strip path direction, are preferably attached to the shaft ends of the rollers in the roller unit.

[Action]

In order to perform the biting operation of the strip tip, the upper movable pressing member of the strip pressing device is lowered to sandwich the strip, and the roller unit is in the form of a pinch roller to advance the entire guide frame. At this time, this forward force is given by the moving inertia energy of the entire guide frame, and the force concentrates on the tip end portion of the strip clamped by the strip pressing device and the roller unit as the pinch roller, and Push between work rolls with strong force. Further, since the strip pressing device can be arranged close to the bite part of the work roll, the strip can be clamped at a portion closer than the tip of the strip, and reliable buckling operation with less buckling can be performed.

After the strip bites into the work roll, the upper movable holding member of the strip holding device rises, releasing the strip and making the roller unit in the form of a bridle roller. In this bridle roller, tension is applied by applying plastic bending by the roller to the strip. Therefore, unlike the conventional plate pressing device using wood chips, there is no problem of maintenance due to scratches and abrasion, and semi-continuous operation is possible.

When the guide frame further incorporates the side guide device, it is possible to prevent the strip from meandering near the work roll.

Further, when the above-mentioned clutch and bearing are mounted on the roller unit, it is possible to hold the strip by preventing the roller from reversing in the strip retracting direction in the form of a pinch roller with a compact structure.

〔Example〕

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

FIG. 1 to FIG. 3 show the main part of the tandem mill on the inlet side, which is modified from a batch type to a semi-continuous type and a batch type by arranging an inlet side guiding device according to an embodiment of the present invention. Is. In these figures, 1 is a roll housing on the driving side and an operating side, the roll housing 1 is fixed on a sole plate 2 fixed to the ground foundation, and a strip is provided on the window frame portion 1B of the roll housing 1. A pair of work rolls 3 and 3'for rolling and a pair of reinforcement rolls 4 and 4'for reinforcing and supporting the work rolls 3 and 3'are arranged such that both ends are supported by a bearing box. A box-shaped guide frame 5 is provided between the entry side post portion 1A of the roll housing 1 on the driving side and the operation side.
Are arranged, and the guide frame 5 has both ends 5A and 5B.
The guide rails 6A and 6B fixed to the lower side of the post section 1A.
It is supported so that it can move horizontally in the pass direction. The lower side of the guide frame 5 is a hydraulic cylinder 8 for moving a frame held by a holding frame 7 fixed to the source plate 2.
It is connected with the continuous pin 9.

Stoppers 10 and 10 'are fixed to the upper part and the lower part of the entrance side post portion 1A of the roll housing 1 so that the guide frame 5 does not advance more than a predetermined amount. On the inside front side of the guide frame 5, both side portions 5A, 5A of the guide frame 5 are provided.
A pair of hydraulic cylinders 12 are supported by a beam-shaped member 11 fixed between B, and an upper pressing member 14 is mounted on the hydraulic cylinders 12. The upper pressing member 14 has a supporting member 15 and an upper wood piece 13 held by the supporting member 15, and the supporting member 15 is detachably attached to the rod tip of the hydraulic cylinder 15 for replacement of the upper wood piece 13. There is. On the other hand, below the upper pressing member 14, the lower pressing member 18 holding the lower tree piece 16 by the supporting member 17 is provided.
Is arranged. The support member 17 is movably supported in the plate width direction of the strip on the upper part of the guide frame 20 fixed in a beam shape between the both side portions 5A and 5B of the guide frame 5. Support member
A plurality of rigid guide rollers 21 that constitute a side guide device are also installed on the 17 side. A screw shaft 19 that guides the support member 17 in the width direction of the strip is disposed on the guide frame 20 so as to be driven by a hydraulic pressure or an electric prime mover (not shown).

Further, a beam member 30 is fixed between the upper side portions 5A and 5B of the guide frame 5 behind the guide frame 5 in the pass direction, and two types of hydraulic cylinders 31 are staggered in the plate width direction of the beam member 30. , 32 have been installed. A movable frame is attached to the rod tip of the hydraulic cylinder 32, which is located in the center of the plate width direction.
36A is mounted on the movable frame 36A via the double-ended bearing box 48 shown in FIG. 4 and FIG. 5 which is guided inside the upper side portions 5A, 5B of the guide frame 5 so as to be vertically movable. A central free roller 33 is supported. Movable frames 36B located before and after the movable frame 36A are attached to the rod tips of the hydraulic cylinders 31 located on both sides in the plate width direction, and the front and rear movable frames 36B similarly have both upper side portions of the guide frame 5, respectively. Upper front and rear free rollers 34, 35 are supported via bearings 48 on both sides that are vertically guided inside 5A, 5B.

Below each of the upper rollers 33, 34, 35, another lower roller 37, 38, 39 is arranged on the vertical line of the shaft center of each of the upper rollers. Box 48
have. A bearing box 48 of the central lower roller 37 is driven by a hydraulic or electric prime mover (not shown) via a movable frame 41A to move a screw up and down.
It is supported by a hydraulic cylinder 40 or another hydraulic cylinder, and is guided up and down inside the both side portions 5A, 5B of the guide frame 5 in the vertical direction. On the other hand, the lower front and rear free rollers 38, 39 are located in front of and behind the central lower free roller 37, and the bearing boxes 48 at both ends are fixed in two beams 5A and 5B inside the guide frame 5 in a beam shape. It is attached to the support member 41B.

Behind the entrance-side guide device in the path direction, it is used during coil batch rolling, so the unwinder 42 and the passage position of the strip 44 from the strip coil 43 mounted on the unwinder 42 are kept constant. A deflector roller 45 is arranged for this purpose.

Furthermore, the guide plate 46 for winding the strip coil 43, which is not rolled, is fed out from the pinch roller of the pickling equipment located at the rear of the strip moving direction without the leading and trailing ends. It is arranged behind the launch vehicle 42.

The upper and lower free rollers 33, 34, 35, 37, 38, 3 above
As shown in FIGS. 4 and 5, the bearing box 48 that supports both shaft portions of 9 has a bearing 47 and a one-way clutch 56 located axially outside the bearing 47. Is the inner ring 49 fixed by the key 50 on the shaft end of the roller and the fixing pin 53.
Alternatively, with the fixed member 52, the movable frame 36A which is a supporting member,
36B, 41A or the outer ring 51 fixed to the fixed support member 41B,
A large number of lock pins arranged between the inner ring 49 and the outer ring side 51
It consists of 54. By configuring the bearing box 48 with the bearing 47 and the one-way clutch 56 in this way, it is possible to prevent the roller from reversing in the backward direction and to provide the function of a pinch roller with a compact configuration.

Here, the operation of the entrance guide device having the above-described configuration will be described.

When the semi-continuous operation is performed, the continuous strip 44 'is fed by the pinch rollers of the pickling equipment which is the equipment at the front side of the tandem mill on the inlet side. At this time, due to the tip biting operation of the strip 44 ′, as shown in FIG. 6, the inlet side guide frame 5 is in a position where it is retracted by the frame moving hydraulic cylinder 8 and stands by. 33, 35 and upper pressing member 14
Is in a raised position so that it can pass the strips. Strip 44 '
Is inserted into the entrance guide device in this state. At this time, strips
The position of the tip portion 44'a of the 44 'is correctly set at a predetermined distance from the bite of the rolling rolls 3, 3'by a discharge tube type position detector, which is installed on the guide frame 5 and includes two members (not shown). Be stopped. The leading end portion 44'a of the strip stopped at this position is the rigid guide roller of the side guide device.
It is correctly positioned in the center of the width by 21, and immediately thereafter, the strip upper pressing member 14 descends, and the strip 44 'is formed by the upper tree piece 13 attached to this and the lower tree piece 16 fixed to the lower side. To be held. At the same time, the strips on the upper surface of the lower rollers 38, 37, 39 with the roller upper surface set on the passage line of the strips.
By driving the hydraulic cylinders 31 and 32, 44 ′ is strongly pressed and clamped by the upper rollers 34, 33 and 35. In this state, a strip 44 'is provided behind the upper rear roller 34 and the lower rear roller 38.
So that the loop 44'b is formed, the strip 44 'is slightly sent out by the pinch roller of the pickling equipment of the preceding equipment, and this value is set to the distance between the rolling roll bite and the tip portion 44'a. Then, the inlet side guide frame 5 is moved forward by the frame moving hydraulic cylinder 8. In addition, loop 44 '
The length of the strip 44 'on which b is formed may be predicted in advance, and the entrance-side guide frame 5 may be advanced at the same time when the strip is fed. The forward force at this time is given by the moving inertia energy of the entire weight of the guide frame of the entrance side guiding device, and the force is the strip pressing members 14, 18 and the upper and lower rollers 33-3.
Concentrated on the tip portion 44'a of the retained strips of 5,37-39,
It is pushed into the rolling rolls 3, 3'with a strong force.

In this case, unlike the conventional roller, the one-way clutch 56 including the outer ring 51, the inner ring 49, and the lock pin 54 is provided at the end of the roller of the present invention, as described with reference to FIGS. 4 and 5. As shown in FIG. 7, since each roller can freely rotate in the arrow direction as shown in FIG. 7, it can be rotated in the opposite direction. The lock pin 54 protrudes from the groove 55 of the inner ring and acts as a lock to prevent rotation. That is, the roller unit including the rollers 33 to 35 and 37 to 39 does not rotate in the direction of pushing the strip, but acts as a pinch roller. Therefore, the strip 44 'is not limited to the upper and lower presser plates 14 and 18, but the roller units 33 to 35 and 37 to.
It is also strongly held by 39, and as in the conventional case, the reverse feeding or the strip stops, and only the roller and the frame do not advance.

In this way, after the strip 44 'is bitten into the rolling rolls 3, 3', as shown in FIG. 8, the upper front and rear rollers 34, 35 acting as pinch rollers are lifted and the strips The roller 37 in the lower central portion is sufficiently lowered from the strip passage surface and separated from 44 ', and at the same time, the upper central roller 33 on the vertical line of the lower roller 37 is further lowered from the strip passage line, and the lower front and rear sides. The strips are curved between the rollers 38 and 39, and the strips 44 'are plastically bent so that rearward tension is applied. This bending amount needs to be adjusted by the plate thickness of the strip 44 ', which can be arbitrarily adjusted by the position of the hydraulic cylinder 32 and the hydraulic pressure adjustment.

As described above, after biting the tip of the strip 44 ', the roller units 33 to 35, 37 to 39 are formed into bridle rollers, and the backward tension is applied by applying plastic bending by the roller to the strip. By applying the method, there is no problem of maintenance due to scratches and abrasion, unlike the conventional plate pressing device using wood chips.

During the rolling operation, the strip 44 'between the rolling work rolls 3 and 3'and the lower rear roller 39 and under tension is guided in the width direction by the rigid guide roller 21. At this time, the rigid guide roll 21 is installed very close to the rolling rolls 3 and 3 ', so that it effectively acts to position the strip width direction at the center and exhibits a descent to prevent meandering.

As mentioned above, in semi-continuous operation, the upper and lower wood pieces 1
Unlike the conventional method, the replacement of 3,16 is performed from the window frame portion 1B of the housing 1. However, since only the operation of biting the strip end 44b is used, the wear is small, and the replacement frequency is the same as the conventional one.
Since it is less than one-tenth, and since it is not used continuously, it is possible to use not only timber but also synthetic resin having wear resistance and long life. Further, since the length of the wood piece is short and the size of the wood piece is small, the handling becomes extremely easy.

When performing a batch operation, the vertical pressing members 14 and 18 can be used as needed to apply rearward tension, as required.

〔The invention's effect〕

According to the present invention, when the strip biting operation is performed, the strip is clamped by the strip pressing device and the roller unit in the form of a pinch roller, and the entire guide frame is moved to force the strip on the work roll. Can be bitten into. Further, when applying the rearward tension, the roller unit is formed into a bridle roller shape to apply the rearward tension.
Without causing harmful flaws due to the clamping action on the strip,
It is possible to provide a backward tensioning function having a long life. Also, since the guide frame that can move in the strip path direction is simply equipped with the strip pressing device and the roller unit, there is no member to move to the rolling mill drive side, and it can be easily stored and installed in the existing space. You can

When the side guide device is further incorporated in the guide frame, meandering of the strip can be effectively prevented.

When the clutch and the bearing are mounted on the roller unit, it is possible to hold the strip by preventing the roller from reversing in the strip retracting direction in the form of a pinch roller with a compact structure.

[Brief description of drawings]

FIG. 1 is a vertical cross-sectional view of an entrance-side guide device for rolling equipment according to an embodiment of the present invention, showing a state in which a strip is sandwiched and bitten into a work roll, and FIG. FIG. 4 is a view taken along the line II-II, and FIG. 3 is a top view showing a state in which the upper working roll 3 and the upper reinforcing roll 4 of the entrance guide device shown in FIG. 1 are removed, and FIG. Is a cross-sectional view of the roller bearing box of the entrance-side guide device, FIG. 5 is a cross-sectional view taken along the line VV of FIG. 4, and FIG. 6 is a strip clamping of the entrance-side guide device. FIG. 7 is a view similar to FIG. 1 showing the previous standby state, FIG. 7 is a cross-sectional view showing the roll rotation direction of the roller unit of the entry-side guide device, and FIG. 8 is a line of the entry-side guide device. It is a figure similar to FIG. 1 which shows the state which applied the back tension to the piece. Explanation of code 1 …… Housing 1A …… Inlet side post part (housing) 5,5A, 5B …… Guide frame 6A, 6B …… Guide rail 14 …… Upper movable presser member (strip presser device) 18 …… Down Side fixed presser member (strip presser device) 19 …… Screw shaft (moving means) 21 …… Stiff guide roller (side guide device) 33 to 35,37 …… Movable roller (roller unit) 8,39 …… Fixed Roller (roller unit) 48 …… Bearing box, 56 …… One-way clutch

Claims (4)

(57) [Claims] 1. A guide frame is incorporated inside two housings on an operating side and a driving side, and the guide frame is
A strip pressing device including an upper movable pressing member and a lower fixed pressing member, and a pinch roller and a bridle, which are arranged rearward of the strip pressing device in a strip path and each include a fixed roller and a movable roller that can move up and down individually. An inlet side guide device for cold rolling equipment, comprising a roller unit that also serves as a roller, and the guide frame is configured to be horizontally movable in the strip pass direction. 2. The guide frame further comprises a plurality of rigid guide rollers arranged on both sides of the strip pressing device, and means for adjusting and moving the rigid guide rollers in the strip width direction. The inlet guide device for cold rolling equipment according to claim 1, further comprising a side guide device. 3. A pair of upper and lower pairs of rollers having an axis on a vertical plane, at least one of the pair of rollers moving up and down so that the strip can be caught and the strip can be pushed. A guide unit for a cold rolling facility, wherein a bendable roller unit is mounted on a guide frame, and the guide frame is horizontally movable in a strip path direction. 4. A clutch and a bearing are mounted on a shaft end of each roller in the roller unit, the clutch and the bearing having a large rotational resistance or being incapable of rotating in a rotational direction opposite to the strip path direction. The entrance guide device of the cold rolling facility according to claim 1.