JPH0246957A - Method for carrying rapidly cooled metal strip - Google Patents

Abstract

PURPOSE:To enable stable carrying by passing a metal strip rapidly cooling and solidifying molten metal on the surface of cooling roll to pinch rolls composing of one pair of brushing roll and solid roll and specifying the speed of the pinch rolls at the time of carrying the metal strip to the coiling reel. CONSTITUTION:The rapid cooled and solidified metal strip on the cooling roll 1 surface is passed to the pinch rolls 7 composing of one pair of the brushing roll 7b and the solid roll 7a. Variety of tension developed caused by shifting of the pinch rolls 7 is absorbed with slip in the pinch rolls 7 and meandering of the strip is prevented with the centering function of the brushing roll having helical gear shape. The peripheral speed V1 of the cooling roll 1, the peripheral speed V2 of the pinch roll 7 and the shifting speed V3 of the pinch roll 7 are made to widen the permissible range of the adjusting accuracy of the speed by satisfying V2+V3>V1 and V1>=V3. By this method, in the carrying process to the reel 12 winding the rapid cooled strip, by correcting the line and giving the suitable tension, the stable carrying is executed.

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Field of Application) The present invention relates to a method of transporting a cold metal ribbon after production to a winding roll.

Rapidly cooled metal ribbons (hereinafter referred to as ribbons), such as amorphous ribbons, which are continuously produced at high speed, have many technical difficulties in transporting them after production, but this invention leads to a take-up reel. This aims to stabilize conveyance guidance.

(Prior Art) For example, in manufacturing an amorphous ribbon, a molten metal is rapidly solidified on the surface of a cooling roll rotating at high speed, and a thin ribbon is continuously manufactured. In particular, when manufacturing amorphous ribbons with a thickness of about 30 μI, the circumferential speed of the cooling roll is 20 to 40 m/min.
It was implemented around s.

In order to wind up the ribbon produced at such high speeds, special measures are required to transport and guide the ribbon.

Japanese Unexamined Patent Publication No. 59-43772 discloses that air is blown out as a driving fluid from a duct-like transport space that partitions a cavity with a flat rectangular cross section, and that due to the influence of pressure drop on the surrounding environment of the high-speed fluid, the inside of the duct It is disclosed that the surrounding fluid is suctioned to smoothly introduce the ribbon into the duct and carry it out. This technology peels off the ribbon more stably than a cooling roll,
If there is no turbulence in the surrounding environment fluid, sequential conveyance is possible, but if the ribbon gets clogged in the duct or the peeling point of the ribbon on the cooling roll moves up and down unstablely, the ribbon can be conveyed at the entrance side of the duct. disconnects.

On the other hand, JP-A-56-12257 and JP-A-59-138
No. 572 publications propose carrying out the ribbon using two brush rolls and applying tension by sliding resistance, but the advancement of the ribbon is unstable and, for example, due to tension difference, etc. Meandering easily occurs, making it difficult to convey the ribbon continuously. Furthermore, in order to apply an appropriate tension, it is necessary to apply a large rolling blade to the upper and lower brush rolls, and the ribbon is likely to break.

Furthermore, Japanese Utility Model Application Publication No. 61-167248 proposes a ribbon conveying device consisting of a combination of upper and lower pinch rolls, an air nozzle, and a guide conveyor, but there is no meandering correction device for the ribbon, and high-speed threading is not possible. It's impossible. Furthermore, in this device, tension applying devices are arranged one after another after the cooling roll, and a large tension is generated at the initial stage of winding, which inevitably causes the ribbon to be cut between the cooling roll and the pinch roll.

Furthermore, Japanese Patent Publication No. 59-34467 shows a system in which a magnetic reel for winding is arranged close to a cooling roll, but since the magnetic reel is in close contact with the cooling roll, there is no risk of damage to the ribbon due to splash. There is a risk that the measurement
It is difficult to install a control system, making it unsuitable for industrialization where stable production is desired.

(Intelligence B to be solved by the invention) For example, molten metal is rapidly solidified on the surface of a cooling roll rotating at high speed, and when the continuously manufactured rapidly chilled ribbon is conveyed, meandering is corrected and appropriate tension is applied. It is an object of the present invention to propose a method that can realize stable conveyance.

(Means for Solving the Problems) This invention provides a pinch roll that is a pair of a brush roll and a solid roll, which is disposed between a cooling roll for rapidly solidifying molten metal and a take-up reel. The cold metal ribbon produced by rapidly cooling and solidifying the molten metal is passed through, and then the pinch roll is moved to the take-up reel.In conveying the cold metal ribbon to the take-up reel, the circumferential speed of the cooling roll is V8, The circumferential speed v2 of the pinch roll and the moving speed ν of the pinch roll are ν2+ν, > V, and V, ≧
This is a method for conveying a rapidly cooled metal ribbon, characterized by adjusting the circumferential speed and moving speed of the pinch rolls under a relationship that satisfies the condition ν.

Now, FIG. 1 shows a ribbon conveying device and a take-up reel which are advantageously adapted to the present invention. In the figure, 1 is a cooling roll, 2 is a nozzle that supplies molten metal to the circumferential surface of the cooling roll 1, 3 is a ribbon, 4 is an air knife that separates the ribbon 3 from the cooling roll 1 by blowing air, and 5 is a deflore. , 6 is a duct hood equipped with a suction port facing in the tangential direction of the cooling roll 1;
7 is a pinch roll placed behind the duct hood 6.
11 is a solid roll, 7b is a brush roll, 8 is a fan disposed downstream of the pinch roll, 9 is a trolley for moving the guiding device 10 consisting of the pinch roll 7 and the fan 8, and 11
is the revolution of the take-up reel 12, 13 and 14 are carousel reels, 15 is a swing arm, 16 is a defrole,
19 is a dancer roll, and 20.21 is a def roll. Note that the solid roll 7a of the pinch roll 7 may be, for example, a crown roll, which is advantageous for preventing ribbon meandering, and the brush roll 7b may be, for example, one in which a wire is spirally wound in the axial direction.

Next, the procedure for conveying the ribbon will be explained.

Now, as shown in FIG. 1, the molten metal poured from the nozzle 2 is rapidly solidified on the surface of the cooling roll 1 to form a ribbon 3.

Next, the thin ribbon 3 attached to the surface of the cooling roll 1 and rotating,
It is peeled off from the cooling roll 1 using an air knife 4. The peeled ribbon 3 is introduced from the duct hood 6 into the opening between the rotating solid roll 7a and the brush roll 7b, and then the unsteady tip of the ribbon 3 is crushed by the fan 8. On the other hand, the remaining thin ribbon 3 in the steady portion is rolled down between the solid roll 7a and the brush roll 7b and tension is applied thereto. In this state, the pass line of the ribbon 3 is stable, and peeling from the cooling roll 1 progresses while contacting the deflation roll 5.

Next, as shown in FIG.
The winding reel 12 maintains the tension applied to the ribbon 5.
Move in the direction of. At this time, the peripheral speed V1 of the cooling roll,
Pinch roll circumferential speed vt and trolley (pinch roll)
The relationship between the moving speed v3 of is V, +V, > V, and V, >V.

FIG. 3 shows the state in which the ribbon 3 has been passed through the take-up reel 12 and just before being wound around the carousel reel 13, 14. After the cart 9 has advanced to the rear of the take-up reel 12, the dancer The ribbon 3 is brought into contact with the roll 11, the deflore rolls 20, 21, 22, and 16, and preparations for winding begin. Then, the take-up reel 12 is rotated, and the first carousel reel 13 is
approach.

Next, as shown in FIG. 4 immediately before winding, the ribbon 3 is cut with a knife 17 to separate the ribbon 3 on the guiding device 10 side, and at the same time, the ribbon 3 is transferred to a carousel reel with a presser roll 18. Press it to 13. The carousel reel 13 has the function of winding the ribbon and starts continuous winding.

(Function) Conventional feeding of the ribbon is generally carried out using a pinch roll that is paired with a solid roll, and the circumferential speed of the cooling roll is v1.
If the circumferential speed v2 of the pinch roll and the moving speed V of the pinch roll are not controlled so as to strictly satisfy the relationship V, + V, = V, the ribbon will break or sag.

On the other hand, if the ribbon is fed by a pinch roll that is a pair of a brush roll and a solid roll, the tension fluctuation caused by the movement of the pinch roll is absorbed by the slip in the pinch roll, and the meandering of the ribbon in the - direction is caused by a double helical pattern. This can be prevented by the centering function of the shaped brush roll, and V2 and V are Vz
It is sufficient to satisfy +V3 >L or >v3, and the allowable range of speed adjustment accuracy can be widened.

Therefore, it is usually advantageous not to adjust the speed by leaving the circumferential speed of the cooling roll as it is, and adjusting the circumferential speed and moving speed of the other pinch rolls as necessary.
Appropriate tension can be maintained on the ribbon.

In addition, it is preferable in actual operation that the circumferential speed v11 of the cooling roll, the circumferential speed v2 of the pinch roll, and the moving speed v3 are set within the following ranges.

That is, if the upper limit of vl is set to 40 m/s or less in consideration of the manufacturing conditions of the amorphous ribbon, and the lower limit exceeds Om/s, it is possible to manufacture a thick crystalline ribbon.

The upper limit of v2 is 10011I/s due to the life of the brush roll.
The conveyance tension for an amorphous ribbon that is very easy to break is 2 to 8 kgf, but in order to keep the tension within this range, the ratio of the pinch roll circumferential speed to the cooling roll circumferential speed (draw ratio) should be set to 1. It is desirable to set it to .0-1.3. For this reason, v2 is set to 50 m/s or less.

v3 must be within a range that does not exceed vl, so
The speed shall be 40m/s or less.

(Example) Fe-
Si-B amorphous alloy ribbon (25 μm thick, 10
0III1 width) was conveyed to the take-up reel at a circumferential speed of the solid roll and brush roll: 32 m/s and a moving speed of the platform and wheel (pinch roll) of 1 m/s. As a result, the almost constant tension ( 1.5kg f/las
z), stable conveyance and winding could be performed from beginning to end, and coils with a heat size of up to 1 ton were obtained.

(1) Solid roll (crown shape) Roll diameter Center part: 83mm Both ends: 80mn+ Roll axis length: 170 varm Roll material: 545C (2) Brush roll Roll diameter: 80mn+ Roll axis length: 1701111 Roll axis diameter: 251 0 - Shaft material: S45C Brush wire diameter: 0.2 mm Brush wire material: Stainless steel Brush wire winding structure: The center of the brush roll body length is distributed so that the center of the thin plate is aligned in the direction of movement of the thin plate. For double helical winding with opposite thread winding and right hand winding, the Fe-Si-B amorphous ribbon is guided to the pinch roll using a pinch roll that is a pair of the brush roll with the same specifications as in the above-mentioned embodiment. When the ribbon was captured, the tension slack as shown in FIG. 6 occurred, and the ribbon meandered and was cut, making it impossible to convey it to the take-up reel. Note that V, Vt and v3 were set to the same conditions as in the example.

When the Fe-Si-B amorphous ribbon was guided to the pinch roll using a pinch roll paired with a solid roll having the same specifications as in the above example, and the ribbon was captured, the result is shown in Fig. 7. The tension fluctuation as shown occurred, and the ribbon was cut, making it impossible to guide the conveyance. Note that V, , V, and V were the same conditions as in the example.

(Effects of the Invention) As described above, according to the present invention, rapidly quenched ribbons, such as amorphous ribbons, which are produced continuously at high speed by a single roll method or a melt draft method, are produced from a cooling roll. Stable conveyance can be achieved by correcting meandering during the conveyance process from peeling to the take-up reel and applying appropriate tension.

[Brief explanation of the drawing]

FIGS. 1 to 4 are explanatory diagrams showing the conveyance procedure according to the present invention, and FIGS. 5 to 7 are graphs showing tension fluctuations during conveyance of the ribbon. 1... Cooling roll 2... Nozzle 3... Thin strip 4... Air knife 5... Deflore roll 6... Duct hood 7... Pinch roll 7a... Solid roll 7b... Brush roll 8...Fan 9...Dolly
10... Guidance device 11... Revolution axis 13, 14... Carouselry 15... Swing arm 17... Knife 19... Dancer roll 12... Winding-rule 16... Defroll 18...Presser roll 20, 21...Def roll Figure 5 Time (SeC)

Claims (1)

[Scope of Claims] 1. A pinch roll, which is a pair of a brush roll and a solid roll, is arranged between a cooling roll and a take-up reel for rapidly cooling and solidifying the molten metal, and the molten metal is rapidly solidified on the surface of the cooling roll. When passing the quenched metal ribbon produced by the process, and then moving the pinch roll to the take-up reel to convey the quenched metal ribbon to the take-up reel, the peripheral speed of the cooling roll V_1, the peripheral speed of the pinch roll V_2, and Pinch roll movement speed V_3 is V_2+V_3
>V_1 and V_1≧V_3, the peripheral speed and moving speed of the pinch rolls are adjusted.