JPH03281001A - Reversing cold rolling equipment - Google Patents

Abstract

PURPOSE:To treat a scrap strip in a short time and with high efficiency by providing a scrap coiling drum in parallel to a coiler so as to be freely movable between the coiling axis of coiler and a parallel and standby position. CONSTITUTION:When the final pass is started, a coiling device 7 for scrap strip is moved from the standby position and situated in parallel on the side of coiler 3, a scrap coiling drum 9 is expanded its diameter by the action of cylinder and a extruding plate is situated at the base part of the scrap coiling drum 9. Next, the step part Sba of the strip S on the side of the coiler 3 is cut off with a shear 4 just after it is passed through the position of a shear 4 on the side of the coiler 3. All of unrolled part Sb is coiled by winding the side of a cut unrolled part around the scrap coiling drum 9 using a wrapper device. When coiling is ended, the scrap coiling drum 9 is reduced its diameter by operating the cylinder inversely and a coiled unrolled part Sb is extruded by moving the extruding plate and dropped into a vessel for scrap.

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention is directed to a method that prevents unrolled portions from remaining on the inner and outer circumferential portions of a coil that has been wound up after reverse rolling that allows multi-bus rolling. The present invention relates to a reverse type cold rolling equipment that can easily and efficiently cut and remove unrolled parts within the rolling equipment.

[Conventional technology]

Cold rolling is generally carried out in the rolling process for manufacturing relatively thin metal plates such as ordinary steel plates and stainless steel plates, and in particular, reverse type cold rolling that allows multi-pass rolling is used. It is widely practiced because it is advantageous in terms of cost. Such reverse cold rolling will be explained with reference to the drawings. Fig. 5 is a schematic explanatory diagram of a conventional reverse type cold rolling equipment, Fig. 6 is an explanatory diagram schematically showing a cross section of an unrolled portion of a strip obtained by reverse type cold rolling, and Fig. 7 is an explanatory diagram schematically showing a cross section of an unrolled portion of a strip obtained by reverse type cold rolling. It is an explanatory view showing a state where a portion is wound up.

As shown in FIG. 5, a conventional reverse type cold rolling equipment 1' includes a rolling mill 2, and on both sides thereof a coil winding machine 3 and a shear 4, which are also used as a coil unwinding machine 3'. Although not shown, there is also a rolling oil supply device 9, a mount insertion device,
Various auxiliary devices such as belt wrapper devices are installed.

Reverse cold rolling using the reverse cold rolling installation 1' is performed as follows. The strip S is unwound from the coil S' which is set on the unwinding shaft 3a' of the coil unwinding member 3' together with the sleeve 6 (this sleeve 6 may not be used), and the strip S is unwound from the coil S' which is set on the unwinding shaft 3a' of the coil unwinding member 3'.
a, 2a with a sufficient gap formed between the strips S
5. Attach the tip of the deflector roll. Rolling mill 2. The deflector roll 5 is guided with red wire, and the coil winding machine 3 winds #3a.
After winding the strip S around the sleeve 6 (this sleeve 6 may not be used in some cases), the rolling It & 2 is activated to roll the strip S while applying tension and winding it with the work roll 28. The coil S'
As the unwinding of the coil S' on the coil unwinding machine 3' side approaches its end, each side of the previous 9 windings is reversed and the strip S is wound in the opposite direction. Rolling is performed again while running, and this process is repeated until a predetermined thickness is achieved.

Therefore, the end portion of the strip S forming the coil S' obtained by reverse rolling in this manner is not subjected to strong pressure by the rolling mill 2 and is not rolled. For example, both ends are the sixth
As shown in the figure, the unrolled portion sb has a cross section that is thicker than the rolled portion Sa, and is connected to the rolled portion S8 at a stepped portion Sba in plate thickness. Since the end portion of the strip S forming the coil S′ obtained by reverse rolling has such a stepped portion Sba, it is possible to prevent a decrease in product yield during rolling and to make winding easier. For the purpose,
Prior to rolling, a service tail is welded to both ends of the strip S in advance, with the portion that will become the unrolled portion sb being a separate strip. In this case, this service tail becomes the unrolled part sb, so this step part S
In order to reduce the step difference in ba, a slightly thicker service tail is used, but its thickness still needs to be balanced with the thickness of the strip S to be rolled before rolling.
There are two limits, and it does not eliminate the level difference after rolling.

Not only until the end of this rolling, but also after the end of rolling.

Coil S in various treatment steps such as heat treatment 9 surface treatment
The unwinding and 2nd winding of ' is repeated. At this time, as described above, the strip S has unrolled portions sb at both ends (with a service tail if a service tail is used).
is wound as it is into the form of coil S', then 1
During winding, the unrolled portion sb is rolled up as shown in FIG. 7, and due to the presence of the tip, a portion sbb subjected to stress concentration and a stepped portion Sba appear on the circumferential surface. A normal thin rolled part Sa is subsequently rolled up on this unrolled part sb, and at this time, a plate is placed at a position corresponding to the development position of each of the above-mentioned parts Sbb and Sba over the entire length of the rolled part Sa to be rolled up. A bend-like defect occurs as if it were billinted, and this defect further induces abrasions, scratches, etc. In particular, the thickness of the rolled part s8 is 0.3wlIy
In the case of extremely thin sheets of less than m, such bend-like defects become fatal defects, and in the worst case, the rolled portion Sa, which has been painstakingly rolled, has no choice but to become scrap instead of becoming a product.

Therefore, in order to prevent such various defects and scraps from occurring, it is necessary to remove the unrolled portion during any reversal (when changing the rolling direction) during multi-pass rolling or at least during the final bus of rolling. Removal of sb is preferred and was actually practiced.

Conventionally, the unrolled portion sb in the final bus was removed as follows. When starting the final bus, the strip S is divided into the unrolled part sb and the rolled part Sa on the coil winding machine 3 side.
Coil winding 4113 at the rolled part S8 close to the boundary with
The unrolled part sb (the tip of which is still wound around the coil winder 3) is cut by the side shear 4 and wound into the coil winder 3 as a waste strip. When the sleeve 6 is set on the winding shaft 38 of No. 3, the sleeve 6 (this sleeve 6 is used when the thickness of the strip S is thin, and is often not used when the thickness of the strip S is thick; (I will explain the case in which it will be used later) together with a coil car or sleeve extractor (
A new sleeve 6 was attached to the empty winding shaft 3a, the tip of the rolled portion Sa was wound around it, and the final pass of rolling was started. When the rolling progresses and the boundary between the unrolled portion sb and the rolled portion Sa on the coil unwinding machine 3' side is unrolled and reaches the shear 4 on the coil unwinding machine 3' side, this shear 4
The rolled portion Sa close to the boundary is cut off and the rolled portion Sa is wound up as it is on the coil winding machine 3, and the remaining unrolled portion sb is scraped by rotating the previous coil unwinding machine 3' in the reverse direction. After being wound up as a strip, it was extracted together with the sleeve 6 using a coil car and transported. In this way, the inner and outer circumferential parts of the coil S that have completed the final bus are not included in the unrolled portion sba, thereby preventing the occurrence of each of the above-mentioned defects.

However, when using the conventional reverse type cold rolling equipment 1' as described above, a coil car must be used to extract and transport the waste strips from the coil unwinder 3' and the coil winder 3. Sleeve 6
When using coil unwinding machine 3, insert a new sleeve 6.
' and the coil winder 3 must be reattached using a coil car, which is a difficult task and requires a great deal of labor and time.

[Problem to be solved by the invention]

The present invention eliminates the drawbacks of the prior art and makes it easy to cut off the unrolled portions generated at both ends of the strip as scrap strips and then transport them, thereby enabling highly efficient scrap strip processing in a short time. The objective is to configure a reverse-type cold rolling facility.

[Means to solve the problem]

As a result of various studies, the inventor of the present invention has developed a dedicated winding device for winding the waste strip onto a waste take-up drum without using a sleeve. By arranging them parallel to the winding shaft of the take-up machine and movable between them and the standby position,
The present invention has been completed by finding out that the above-mentioned problems can be achieved.

DESCRIPTION OF THE PREFERRED EMBODIMENTS The reverse type cold rolling equipment according to the present invention will be explained in detail below with reference to one drawing.

FIG. 1 is a schematic explanatory diagram of an example of a reverse type cold rolling equipment according to the present invention, and FIG. 2 is a front view of an example of a scrap strip winding device used in the present invention.

FIG. 3 is a side view of the same, and FIG. 4 is an explanatory view showing the state in which the waste strip is wound onto the waste strip winding device.

As shown in FIG. 1, the reverse type cold rolling equipment @1 according to the present invention comprises a rolling mill 2, a coil winder 3 (also known as a coil unwinder 3') and a shear 4 on both sides thereof. In addition to the configuration of the reverse type cold rolling equipment 1', a scrap strip winding device [7] having the structure described below has a scrap winding drum 9 parallel to the winding shaft 3a of the coil winding machine 3. The coil winding machine 3 is arranged side by side with each coil winding machine 3 so as to be movable between the standby position and the standby position.

The waste strip winding device 7 is preferably located on the side opposite to the rolling mill 2 of the coil winding machine 3 (coil unwinding machine 3'), as shown in the example in Figure 1, from the viewpoint of operability and installation space. However, if the site conditions permit, it may be placed on the opposite side, that is, between the coil winder 3 (coil unwinder 3') and the rolling mill 2. Further, the standby position of the waste strip winding device 7 is not limited, and may be located, for example, in the axial direction of the waste winding drum 9 placed side by side with the coil winding machine 3 (coil unwinding machine 3'). It may also be located along the length of the rolled and running strip S, or it may be located in any direction or position, and the moving means may be appropriately selected, such as a track type or a free moving type, depending on the direction of the standby position. You can.

This waste strip winding device 17 includes a layer winding drum 9 whose diameter can be expanded and contracted to wind up the waste strip, and a waste strip that is directly wound on the layer winding drum 9 without using a sleeve. An extrusion device for extruding from the open end side of the layer winding drum 9! It is equipped with 28. When the thickness of the waste strip wound on the layer winding drum 9 is thick, for example when the above-mentioned service tail is used, the waste strip may loosen and become loose from the layer winding drum 9. This makes transport and post-processing difficult.

It is preferable to include a presser roll 23 that presses the outer periphery of the waste strip until the band is automatically bound to prevent loosening. This will be explained in more detail using specific examples shown in FIGS. 2 and 3. The waste strip winding device 7 includes a horizontal drum shaft 11 rotatably supported at an angle of 1° on a bearing io on a main body frame 8, and this drum shaft! With a layer winding drum 9 mounted on l.

It mainly consists of a sprocket 12 fixed to the drum shaft 11, and a prime mover 14 with a reduction gear for rotating the drum shaft 11 by a chino 13 hooked between the sprockets 12 and the sprocket 12 fixed to the drum shaft 11. The mechanism for expanding and contracting the diameter of the layer winding drum 9 may be one that is generally used in steel strip winding devices. For example, the mechanism shown in FIG. 2 has the following structure. The peripheral wall of the layer winding drum 9 is divided into a plurality of pieces with cuts in the axial direction, and the base of the rod 15 inserted through the drum shaft 11 is connected to the cylinder 16 whose position is fixed on the main body frame 8. The part of the rod 15 which is rotatably connected to the cylinder rod 17 and the connector part 18 and which is inserted into the hollow part of the layer winding drum 9 and the inner circumferential wall of the divided piece of the layer winding drum 9, Wedges 15a and 9a are the second
As shown in the figure, wedge surfaces that are opposed to each other and formed obliquely are formed so as to protrude so as to come into contact with each other. With this structure, when the cylinder 16 is actuated to move the rod 15 forward or backward in the axial direction, the diameter of the layer winding drum 9 is expanded or contracted (other pressing forces necessary to achieve this effect). (The illustration of springs, etc., to constantly generate this on the wedge surface is omitted). In addition, this layer winding drum 9
It is preferable to place a wrapper device 19 around the area. Particularly illustrated is a roll-type upper attachment, in which arms 22, 22 are mounted on a rotating shaft 21 rotatably supported by bearings 20, 20 installed on the body frame 8 along the layer winding drum 9. is fixed, and a presser roll 23 is attached to the tip thereof. The base of another arm 24 is fixed to the rotating shaft 21, and its tip is rotatably connected to a cylinder rod 27 of a cylinder 26 whose base is rotatably attached to the main body frame 8 with a pin 25. It has a similar structure. As this wrapper device 19, for example, a belt type wrapper can also be used.

In the extrusion device [28] shown in FIG. 3, an extrusion plate 29 having an inner peripheral edge close to at least half of the outer circumference of the layer winding drum 9 is connected to the main body frame as shown in FIG. It is attached to the tip of a cylinder rod 31 of a cylinder 30 that is fixed in position parallel to the axial direction of the layer winding drum 9 on the layer winding drum 9 (or indirectly, such as on the same side).

The extrusion plate 29 is capable of reciprocating movement between the base and the tip of the layer winding drum 9, and a guide 32 is provided to engage with the extrusion plate 29 for smooth movement of the extrusion plate 29. (The guide 32 on the same side is a guide bar fixed to the main body frame 8 and passes through the extrusion plate 29, but the drawing only shows the vicinity of the penetration part to avoid confusion).

As a means for moving the waste strip winding device 7, which includes the layer winding drum 9 and the extrusion device 28, between the standby position and the standby position, when the movement is in a straight line, a track type is preferred because it is simple and robust. is a case where the standby position is in the axial direction of the layer winding drum 9 placed side by side with the coil winding machine 3, and the axle 33 attached to the rail 34 and the main body frame 8 is in the same axial direction as the layer winding drum 9. It is provided so that the waste strip winding device 7 can be moved in this direction. Furthermore, when the standby position is in a direction other than the above, it is generally preferable to use a type that can be moved freely in direction using only the axle 33. In either case, it is preferable to provide a device for fixing the position unevenly at predetermined positions.

[Function] When starting the last bus, the waste strip winding device t7
is moved from the standby position and positioned parallel to the side of the coil winding machine 3 as shown in FIG. 1, and the cylinder 16 is operated to expand the diameter of the layer winding drum 9.

The cylinder 30 is operated to position the extrusion plate 29 at the base of the layer winding drum 9. Next, the stepped portion Sba of the strip S on the coil winding machine 3 side is located at the position of the shear 4 on the coil winding machine 3 side. As shown in FIG. 1, the cut unrolled portion sb is cut by a shear 4 on the side of the coil winding machine 3 as shown in FIG. 19 to completely wind this unrolled portion sb, the cylinder 16 is operated in the opposite direction to the above to reduce the diameter of the layer winding drum 9, and then the cylinder 30 is operated. Extrusion plate 29
is moved to the tip side of the layer winding drum 9, and the unrolled portion sb wound up from the open end side is pushed out and dropped into a waste container prepared in advance. Next is the waste strip winding device! 7 to the standby position. After the unrolled portion sb has been wound onto the layer winding drum 9, the diameter reduction and extrusion operations of the layer winding drum 9 are carried out using the waste strip winding device! 7 to the standby position. Afterwards or as a simultaneous operation, the cut end of the rolled strip S is wound around the winding shaft 38 of the coil winder 3, and the final pass is carried out as usual. When the rear end of the rolled portion S8 of the strip S approaches, the stepped portion Sba is rolled by the coil unwinding machine 3.
It is cut immediately before passing the position of the shear 4 on the ' side, and the rolled portion Sa is wound up on the coil winding machine 3 while being rolled as it is. The unrolled portion sb remaining on the unrolling shaft 3a' of the coil unwinding machine 3' is removed by moving the waste strip winding device 17 on the coil unwinding machine 3' side to the side of the coil unwinding machine 3' in the same manner as above. Drop it into the container by moving and manipulating it. From the strip S that has been reverse rolled in this way, the unrolled portion sb is removed without requiring the troublesome work of removing and reattaching the sleeve 6, and the inner periphery of the resulting rolled coil S' is removed. There is no unrolled portion sb in the area and the outer peripheral area.

〔Effect of the invention〕

The reverse type cold rolling equipment according to the present invention as described in detail above has, in addition to the conventional reverse type cold rolling equipment, winding devices for directly winding the scrap strip onto a layered winding drum whose diameter can be expanded and contracted. The unrolled portions of the front and rear ends are cut in the rolling equipment in the final bus, and the unrolled parts are cut into scrap strips in the final bus. By making it possible to remove the layer by winding it up on the layer winding drum, it has the following effects, and its industrial value is very great.

■ When using conventional equipment, the unrolled part is wrapped around a sleeve attached to a coil winder and removed.
The troublesome work of removing the sleeve with the scrap strip wrapped around it and installing a new sleeve is no longer necessary and can be done very easily, making it possible to save a lot of labor and time in reverse rolling operations. , labor saving and automation of waste stripping process.

Furthermore, it contributes to improving rolling productivity.

■ Above all, when strips are rolled into ultra-thin strips, the product yield can be improved more than ever before, and the occurrence of fatal defects can be prevented.

[Brief explanation of drawings]

FIG. 1 is a schematic explanatory diagram of an example of a reverse type cold rolling equipment according to the present invention, FIG. 2 is a front view of an example of a scrap strip winding device used in the present invention, and FIG. 3 is a side view of the same. FIG. 4 is an explanatory view showing the state in which the waste strip is wound onto the waste strip winding device. Figure 5 is a schematic explanatory diagram of a conventional reverse type cold rolling equipment;
FIG. 6 is an explanatory view schematically showing a cross section of an unrolled portion of a strip obtained by reverse cold rolling, and FIG. 7 is an explanatory view showing a state in which the unrolled portion is wound up. In the drawings 1...Reverse type cold rolling equipment 1' according to the present invention.
... Conventional reverse type cold rolling equipment 2 ... Rolling mill 2a ... Work roll 3 ... Coil winder 3a ... Winding shaft 3' ... Coil winding Unloader 3a'... Unwinding shaft 4... Shear 5... Deflector roll 6... Sleeve 7... Waste strip winding device 8... Main body frame 9. ... Layer winding drum 9a ... Wedge 10 ... Bearing 11 ... Drum shaft 12 ... Sprocket 13 ... Cheno 14 ... Prime mover with reducer 15 ... ... Rod 15a ... Wedge 16 ... Cylinder 17 ... Cylinder rod 18 ... Connector part 19 ... Wrapper device 20 ... Bearing 21 ... Rotating shaft 22... Arm 23... Presser roll 24... Arm 25... Pin 26... Cylinder 27... Cylinder rod 28... Extrusion device 29... Extrusion plate 30...Cylinder 31...Cylinder rod 32...Guide guide 33...Axle 34...Rail S...Strip Sa...Rolled part sb...・・Unrolled part Sba ・・・Step part sbb ・・・Part subjected to stress concentration S′ ・・・・Coil patent applicant Nissin Steel Co., Ltd. 13 Figure

Claims (1)

[Claims] 1. A rolling mill (2) and a coil winding machine (3) which is also used as a coil unwinding machine (3') and a shear (4) on both sides thereof.
A reverse cold rolling facility comprising: a scrap winding drum (9) whose diameter can be expanded and contracted for winding up a scrap strip consisting of an unrolled portion (Sb) of the strip (S); (9) and a pushing device (28) for pushing out the wound strip from the open end side of the waste take-up drum (9).
) places the waste take-up drum (9) parallel to each coil winder (3) parallel to the winding shaft (3a) of the coil winder (3) and movable between it and the standby position. Reverse type cold rolling equipment (1) characterized by: 2 The waste strip take-up device (7) is connected to the waste take-up drum (9).
2. The reverse cold rolling equipment (1) according to claim 1, further comprising a presser roll (23) that presses the outer periphery of the coil of the scrap strip that has been wound up.