JPS63101008A - Method and equipment for reversible cold rolling - Google Patents

Abstract

PURPOSE:To decrease the waste of scrap generation by constituting at least one reel of one unit each of the reels on the inlet side and outlet side of a rolling mill in such a manner that the reel can move at the distance between a reel drum and the rolling mill. CONSTITUTION:A stock 3 which is un-coiled from a stock un-coiling drum 25 is fed through a delivery roller 26 and a retainer 21 into the rolling mill 22. The stock contacts an upper work roll 6 and a lower work roll 7 in the rolling mill 22 and is thereby rolled. The rolled strip is taken up via an outlet side deflector roller 9 on the outlet side reel drum 24. The outlet side reel drum 24 and the inlet side reel drum 23 are positioned to the front ends of turning arms 27, 28, by which the distance from the rolling mill 22 can be changed. The length of the unrolled part existing between the drums 23, 24 and the rolling mill 22 is, therefore, shortened, and the waste of the scrap generation is decreased.

Description

Detailed Description of the Invention (Industrial Field of Application) The present invention relates to cold rolling equipment that cold-rolls a strip (metal plate) and winds it under tension with a reel (winding machine).
In particular, the present invention relates to a reel structure that improves rolling yield in reversible rolling equipment.

[Conventional technology]

FIG. 9 shows an outline of a conventional reversible rolling equipment.

The rolling mill is illustrated as a 6-high rolling mill, but the basic outline is the same whether it is a 4-high rolling mill or a 20-high rolling mill.

That is, the cable material 3 to be turned into a strip is sent out from the raw material coil 2 wound around the entry reel drum 1 and is guided by the entry deflector roller 4 and sent to the rolling mill, where it is rolled up in the roll housing 5 of the rolling mill. Rolling is performed by being sandwiched between the work roll 6 and the lower work roll 7. The deflector roller 4 is used to maintain the material 3 at a constant height despite changes in the diameter of the coil 2. The rolled strip 8 is guided by an exit deflector roller 9 and wound around an exit reel drum 10. At this time, the leading end of the strip 8 is gripped by a drum grip 11 provided on the output reel drum 10. In this way, the entire length of the material 3 is rolled, and after the rolled strip 8 is wound around the exit reel drum 10 and the strip coil 12 reaches its maximum diameter, the strip 8 is sent in the opposite direction. Rolling is done. In this way, the strip 8 is gradually rolled. What is shown in FIG. As an example, there are the following known examples.

・Japanese Unexamined Patent Publication No. 61-52901 ・Hitachi Hyoron Bessatsu No. 29 (May 1960) No. 3 p.
Sensimer ZR22-50 type rolling equipment'' Hideyuki Yamamoto, Tetsuji Taniguchi TJ, r), C621,771,1 and cold rolling mills usually produce strips with a thickness of 2 to 3 m (
The material of the metal plate (metal plate) is reduced in thickness by 3 to 5 times of reversible rolling to 1 to 0.2 I.Unless it is removed from the center of the rolling mill and the grip of the reel drum 1.10, it remains unrolled and remains as an unrolled part. It becomes scrap rather than a product.

[Problem that the invention seeks to solve]

As mentioned above, in the conventional reversible rolling method, the yield decreases due to the generation of unrolled parts, but this is a non-negligible amount. Therefore, it is necessary that the distance "L" between the rolling mill and the reel drum be as short as possible in order to reduce strip scrap and improve the rolling yield. There is a thickness gauge 13 near the deflector roller 9 for measuring the thickness of the strip 8, and a rail 14 is provided to carry out the strip coil 12 after winding the strip 8.
The strip coil 12 is run on the support base 15.
There is an unloading coil car 16 that supports the. and a sheet passing device (not shown) on the rolling mill side.

Necessary space to avoid interference between the plate thickness gauge 13 (Fig. 10), etc. and the strip coil 12 at its maximum diameter, or between the roll housing 5 of the rolling mill and the coil car 16 for unloading the coil. is large, and as a practical matter, there is a limit to shortening the #f, 71 dimension.

Currently, the typical rolling mill dimensions are a maximum plate width of 127 Off 1m.
As the scale, the average rolled material is 2.5W11 thickness, 10
Assuming that the coil weight is 00vn+width, the coil weight is 15 tons, and the monthly production is 30,000 tons, the dimension ■ in Figure 9 is approximately 4.5 m, so
The weight of the unrolled portion of the strip is the sum of the leading and trailing ends of the coil. This corresponds to 1.18% of a 15-ton coil, or 354 tons for a monthly production of 30,000 tons, or 4,248 tons for an annual production of 360,000 tons, resulting in a huge loss. There are two methods to prevent this. One method is to remove the leading and trailing ends of the strip from the drum grip each time, extend it to the end, grip it again, and roll it, but this increases the number of steps and significantly reduces productivity, and removes the grip. As tension cannot be applied to the strip, it is difficult to roll thin materials, so it is only applied to small-scale equipment for non-ferrous metals, where the plate thickness is thick, the coil weight is small, and the rolling speed is slow. It is difficult to apply. Another method is to use a service tail. This is a method in which extra strips are welded to the front and rear ends of the coil to be rolled so that the entire length of the main coil can be rolled. Since the extra cost of cutting and removing after rolling occurs, it is not economically viable unless the material is an expensive material such as stainless steel.

It is an object of the present invention to provide a rolling method and rolling equipment that can significantly reduce the waste of scrap generated by the above-mentioned "L" dimension.

[Means for solving problems]

In the rolling method of the first invention, one
In a reversible rolling facility that is equipped with several reels and performs cold rolling, at least one of the reels has a reel drum that can change the distance between the reel drum and the rolling mill; The present invention is characterized in that the distance is decreased as the diameter of the wound strip coil becomes smaller, and the distance is increased as the diameter becomes larger.

Further, the rolling equipment of the second invention is characterized in that the reel used in the rolling method is provided with a reel drum on the distal end side of the rotating arm rotated by the drive device, and the reel drum is provided on the distal end side of the rotating arm rotated by the drive device. A pinion gear of a take-up motor is coaxially provided at the rotation center, and the pinion gear meshes with the drum gear of the drum shaft of the reel drum through an idler gear located in the middle of the rotation arm, thereby connecting the reel drum and the rolling roller. This allows you to change the distance between you and the aircraft.

[Effect]

As mentioned above, the conventional technology has the drawback that the space required for dimensional arrangement between the reel drum and the rolling mill is determined, and the "L" dimension cannot be shortened.

However, when we looked at the process from the start to the end of rolling, we found the following circumstances. In other words, a space is required when the strip coil reaches its maximum diameter and when the strip coil is unloaded, but a large space is not required when the strip coil has a small diameter (i.e., at the beginning of winding and at the end of unwinding). That's what it means. In the prior art, the reel drum was fixed, and the 'L' dimension remained large because it was determined from the former condition (at the maximum diameter of the strip coil, when using the unloading coil car).In the present invention, the above analysis is applied. Therefore, the position of the reel drum can be moved closer to the rolling machine when the diameter is small (from the beginning of winding to the end of unwinding), and when the coil is thick, it can be moved back to the conventional reel drum position.Since it is reversible rolling, it is possible to move the reel drum closer to the rolling machine. When winding the strip on the reel.

The other reel unwinds the strip, and vice versa for the next rolling. In terms of a single reel drum, at the start of winding, the reel drum is moved closer to the rolling mill, and when the roll thickens, it moves away from the conventional reel drum.At the time of unwinding in the 0th pass, the position of the reel drum is initially moved closer to the rolling mill than the conventional reel drum. The strip is unwound at this position, and as the strip coil becomes smaller in diameter and approaches the end of unwinding, the reel drum position is moved closer to the rolling mill. This shortens the unrolled portion at the leading and trailing ends of the strip, significantly reducing the amount of scrap generated.

〔Example〕

FIG. 1 shows an overall schematic diagram of a reversible rolling facility showing an embodiment of the present invention. In addition, the 0 work rolls 6, 7, etc., which indicate the first pass (especially at the start of rolling) in the reversible rolling process, are housed in the roll housing 5, and the rolling machine is equipped with a plate presser [21, etc.]. One movable reel drum 23, 24 is provided on each of the inlet and outlet sides of the reel 22. At the start of rolling, the material unwinding drum 25 on which the material coil 3 is wound is used. This material unwinding drum 25 is provided separately from the two reel drums 23 and 24, and is provided to simultaneously prepare the next material coil during reversible rolling. The material 3 unwound from the material unwinding drum 25 is transferred to the feed roller 26 and the plate pressing device i! Pass through fi21 and roll mill 2
Enter 2. Rolling is performed in the rolling mill 22 in contact with an upper work roll 6 and a lower work roll 7, and is wound onto an exit reel drum 24 via an exit deflector roller 9. Both the output reel drum 24 and the input reel drum 23, which will be described later, are movable reel drums according to the present invention, and are positioned at the tips of rotating arms 27, 28, so that the distance between them and the rolling mill 22 can be changed. The center of rotation is expressed as O (Os or Oz), and the center of rotation is the output reel drum 24.
At the time when winding is started, the output reel drum 24 has advanced toward the rolling mill 22, and as the winding progresses and the diameter of the coil 12 of the strip 8 made of the rolled material increases, the diameter of the coil 12 increases as indicated by the dotted line in the figure. As shown, the exit reel drum 24' moves back to increase the distance from the rolling mill 22. When the first bus is completed in this way, the rear end of the strip 8 (the rolled and twisted material) is gripped by the inlet reel drum 23, wound up by the inlet reel drum 1123, and the second pass is started. It turns out. Note that the second pass will be explained later in FIGS. 6 to 8.

Next, FIG. 2 shows an enlarged detailed view of the output reel drum 24 (which is a movable reel drum) shown in FIG. 1. The output reel drum 24 is provided on the tip side of the rotating arm 1128. A driving device for rotating the rotating arm 28 is a hydraulic cylinder 29 . At the tip of a piston 30 extending from the hydraulic cylinder 29, the tip side of the rotating arm 28 is pin-coupled 31. Pressure oil in the hydraulic cylinder 29 is supplied by a pump P via an electromagnetic switching valve 32.

Sensors 33 and 34 are provided above the strip coil 12 to measure the diameter of the strip coil. The output signals from the sensors 33 and 34 are sent to the control board 35.
A signal for switching the electromagnetic switching valve 32 is sent from the control board 35.

The hydraulic cylinder 29 is provided on a reel base 36, and the reel base has stoppers 37 and 38 for keeping the rotating arm 28 in a fixed position.

FIG. 3 shows a vertical cross-sectional view of the rotating arm 28 shown in FIG. 2. A drum shaft 41 is provided to pass through the distal end side of the rotating arm 28. As shown in FIG. This drum shaft 41 is formed by an outer hollow shaft 42 and an inner drum shaft core 43. A segment 44 located at the tip of the drum shaft core 43 is for winding the strip coil 12. The segment 44 is in contact with the drum shaft core 43 at a tapered surface 45 to form a wedge structure. Further, the rear end portion of the segment 44 engages with the hollow shaft 42 so that the segment 44 does not move in the axial direction. The rear end of the hollow shaft 42 forms a hydraulic cylinder 46, and the rear end of the drum shaft core serves as a piston 47, which is housed within the hydraulic cylinder 46. Pressure oil is supplied into the hydraulic cylinder 46 from a ground hydraulic supply source via a one-turn joint 48 . When the piston 47 moves in the axial direction due to the action of the hydraulic cylinder 46, the segment 44, which contacts the drum shaft core 43 formed integrally with the piston 47 at the tapered surface 45, expands and contracts in the radial direction. Winding is performed with the segment 44 expanded in diameter, and when the wound strip coil 12 is removed, the diameter of the segment 44 is contracted. The hollow shaft 42 is supported by a frame 50 of the rotating arm 18 via a rolling bearing 49. Frame 50 of the pivoting arm of hollow@42
A drum gear 51 is integrally provided in the inner portion. This drum gear 51 meshes with an idle gear 52 located within the frame 50 of the rotating arm 28. This idle gear 52 meshes with a pinion gear 53 located at the rotation center on the base end side of the rotation arm 28.

This pinion gear 53 is connected to a rotating shaft 55 of a take-up motor 54 via a coupling 56.
4 is fixed externally. Note that what does not rotate in the figure is the take-up motor 54, the pinion gear 53, and the base 58 that supports the rotating arm 28 via a bearing 57.

Next, in FIGS. 4-5, a structure for gripping the strip 8 to the segment 44 is shown. The segment 44 has a slit 61 into which the strip 8 is inserted, and a hydraulic cylinder 62 that can reduce the width of the slit 61 is built into the segment 44. That is, hydraulic cylinder 6
The tip of the second piston 63 forms a part of the slit 61, and by moving forward, the width of the slit 61 is reduced and the strip 8 is gripped.

Pressure oil is supplied to the hydraulic cylinder 62 through the rotary joint 48 (
(Fig. 3) from the ground via an oil hole (not shown). Note that there is a directional switching valve in the middle of this oil hole, and the opening/closing operation of the grip is performed by switching this directional switching valve.

Next, the operation of this embodiment will be explained with reference to FIG. 1 and FIGS. 6 to 8. Note that FIGS. 6 to 8 show the situation of the second pass in reversible rolling. First, as already explained in FIG.

In the first pass, the material coil 2 is unwound from the material unwinding drum 25, rolled by the rolling mill 22, and then wound onto the output reel drum 24.

As this winding progresses and the diameter of the strip coil 12 of the output reel driver 1124 becomes slightly larger, the sensor 33 shown in FIG. 2 detects that the distance HA to the surface of the coil 12 has become smaller and sends a signal to the control board 35. , the control board 35 commands the electromagnetic switching valve 32 to switch, activates the hydraulic cylinder 29, rotates the rotating arm 28, and closes the output reel drum 24.
Move the position from position 1 to position ■ in Figure 2.

Thereafter, winding is performed until the diameter of the strip coil 12 reaches its maximum at this position H. Furthermore, after this first pass, the end of the material coil 3 is attached to the input reel drum 23.
(Figure 6).

This inlet reel drum 23 is a movable reel drum that can change the distance between it and the rolling mill, similar to the outlet reel drum shown in FIG.
This is the solid line shape 8). In the state shown by this solid line, the inlet reel drum 23 is in a state where it does not interfere with the material 3 being unwound from the material unwinding drum 25. In the same manner as the movement of the outgoing reel drum 24, the incoming reel drum 23 continues winding at the position indicated by the solid line in Figure 1 until the diameter of the strip coil becomes larger to a certain extent. When the size increases, the inlet reel drum 23 moves to the position shown in FIG. 7, increasing the distance from the rolling mill 22. At this position, winding is performed until the diameter of the strip coil 12 reaches its maximum. When the sensor 34 detects that the diameter of the strip coil 12 of the output reel drum 24 has become smaller by increasing the distance Hx between the sensor 34 and the surface of the strip coil 12, it issues a signal and controls the control board 35. Via I! Magnetic switching valve 3
2 The output reel drum 2 is controlled by the switching hydraulic cylinder 29.
Move the position 4 from the position ■ to the position ■ in Figure 2. It is also possible to read the number of turns of the strip using a lap counter and start moving the reel. This shortens the distance between the exit reel drum 24 and the rolling mill 22.

The length of the unrolled portion can be minimized (see FIG. 8).

The fact that the length of the unrolled portion can be minimized in this way also applies to the entry reel drum 23. That is, although not shown, for example, when unwinding a strip coil from the input reel drum 23 in the third pass, by setting the input reel drum 23 to the position shown in FIG. 6, the distance between the input reel drum 23 and the rolling mill can be reduced. can be minimized, and therefore the length of the unrolled part can be minimized. Thereafter, similar operations are repeated alternately until the final pass, and rolling can be completed with the length of the unrolled portion minimized.

[Other Examples]

In the present invention, the driving device for rotating the rotating arms 27, 28 is the hydraulic cylinder 29, but in other embodiments, it may be a motor or the like.

Also, although the number of idle gears 52 existing inside the rotating arms 27, 28 is one (FIG. 3), in other embodiments, a plurality of idle gears may be provided to reduce the length of the rotating arms 27, 28. By increasing the length, it is also possible to increase the moving distance of the reel drum.

Further, in the above embodiment, a reel drum that can change the distance between the reel drum l~ and the rolling mill, that is, a movable reel drum using a rotating arm of 1% 27.28 was described, but other embodiments may be used. It is also possible to use a conventional carousel reel. This carousel reel is also described in JP-A-50-100463. A carousel reel is one in which two reel drums are provided on a rotating Harijing, and these two reel drums can revolve according to the rotation. Conventional carousel reels are generally used for unidirectional continuous rolling and are not used for reversible rolling, so the tip and end portions of the strip coil are separated from the drum grip of the reel drum. Since the material was separated and passed through a rolling mill, no unrolled portions were produced. Therefore, the use of conventional carousel reels is not intended to solve the problems that are the object of the present invention.

In addition, the two reel drums that the carousel reel has,
It is used in unidirectional continuous rolling where a large amount of strip is rolled rapidly, and it is also used to quickly replace the strip coil wound up on the exit side of the rolling mill. In other words, the carousel reel is moved so that the reel drum that has finished winding moves backwards (away from the rolling mill), and the reel drum where the strip coil is removed and new winding begins moves forward (closer to the rolling mill). The rotating housing rotates.

Thus, it is meaningful to use the carousel reel in unidirectional continuous rolling.

And the carousel reel housing only rotates in one direction. Therefore, there is no bidirectional rotation as used in the present invention. Therefore, the function is completely different from that of the carousel reel used in the present invention.

Furthermore, as a special example, Japanese Patent Publication No. 61-52901 discloses a conventional example in which a carousel reel is used for reversible rolling. However, unlike the present invention, this conventional example does not change the position of the reel drum during rolling, and therefore the invention of this conventional example also has a completely different technical idea from the present invention.

Furthermore, in the above embodiment, movable reel drums were provided on both sides of the rolling mill, but since the unit weight of the strip coil is light and the number of passes of reversible rolling is small,
The time it takes to extract a coil from the drum makes it necessary to wait for the next coil to start rolling, but in the case of an example in which this time greatly affects productivity, a carousel reel may be provided only on the exit side where the strip coil is extracted. It is possible.

[Effects of Examples]

The distance #la that can be changed between the rolling mill 22 and the 1J-roll drum shown in FIG. 1 was approximately 2 m as a result of a study using actual equipment. Assuming that this many unrolled parts can be omitted, the yield structure will be 0.5%, and a rolling mill with an annual production capacity of 360,000 tons will produce the effect of reducing a large amount of scrap by 1,800 tons per year. Assuming that the unit price of the pickled raw material coil is 60,000 yen per ton and the net price of scrap is 10,000 yen per ton, a profit of 815,000 yen will be generated, resulting in a huge annual profit of 90 million yen. It will produce. Furthermore, the application value of materials with high unit prices such as electrical steel sheets is even greater.1゜[Effects of the Invention] According to the reversible cold rolling method and equipment of the present invention, the reel drum can be moved by making the reel drum movable. The length of the unrolled part existing between the rolling mill and the rolling mill can be shortened, and the waste of scrap generation can be reduced.

[Brief explanation of the drawing]

FIG. 1 is an overall schematic side view showing one embodiment of the present invention, and FIG.
The figure is an enlarged view of the main part of FIG. 1, FIG. 3 is a vertical cross-sectional view of the rotating arm 28 of FIG. 2, FIG. 4 is an enlarged view of the vicinity of the segment 44 of FIG. 3, and FIG. 6 to 8 are views for explaining the operation of the embodiment shown in No. 11m, and No. 9 is a front view of FIG.
The figure is an overall schematic side view showing the prior art, and FIG. 10 is a partially enlarged view of FIG. 9. 1... Inlet reel drum, 2... Material coil, 3...
...Material, 4...Inlet side deflector roller, 5...Roll housing, 6...Upper work roll, 7...Lower work roll, 8...Strip, 9...Outlet side deflector roller , 10...Output reel drum, 11...Drum grip. 12... Strip coil, 13... Plate thickness gauge, 14
... Rail, 15 ... Support stand, 16 ... Unloading coil car, 21 ... Temporary holding device, 22 ... Rolling machine, 2
3.24... Moving reel drum, 25... Material unwinding drum, 26... Delivery roller, 27.28... Rotating arm, 29... Hydraulic cylinder, 30... Piston, 31 ... Bin connection, 32 ... Solenoid switching valve, 33.
34... Sensor, 35... Control board, 41... Drum shaft, 42... Hollow shaft, 43... Drum shaft core, 44
...Segment, 45...Taper, 46...Hydraulic cylinder, 47...Piston, 48...Rotating joint, 49...Rolling bearing, 50...Frame, 51
...Drum gear, 52...Idle gear, 53...
・Pinion gear, 54... Winding motor, 55... Rotating shaft, 56... Coupling, 57... Bearing, 58
...Base, 61...Slit, 62...Hydraulic cylinder, 63...Piston.

Claims (1)

[Scope of Claims] 1. In a reversible rolling equipment that is equipped with one reel on the inlet side and one on the outlet side of the rolling mill and performs cold rolling, at least one of the reels is connected to the reel drum and the reel. It has a movable reel drum that can change the distance between it and the rolling mill, and when the diameter of the strip coil wound on the movable reel drum becomes small, the distance is made small, and when the diameter becomes large, the distance is made large. Features a reversible cold rolling method. 2. The reversible cold rolling method according to claim 1, wherein the reel having a reel drum that can change the distance between the reel drum and the rolling mill is a carousel reel. 3. In a reversible rolling facility that is equipped with one reel each on the entry side and exit side of the rolling mill and performs cold rolling, at least one of the reels is rotated by a drive device. A reel drum is provided on the tip side of the rotating arm, and a pinion gear of the take-up motor is coaxially provided at the center of rotation on the base end side of the rotating arm, and the pinion gear is an idle gear located directly or in the middle of the rotating arm. A reversible cold rolling facility characterized by having a movable reel drum that can change the distance between the reel drum and the rolling mill by meshing with a drum gear of a drum shaft of the reel drum through a movable reel drum.