JP2007275926A - Device and method for changing take-up roll of amorphous thin strip - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a device and a method for changing take-up rolls of amorphous ribbons which are simple and inexpensive regardless of an amount of take-up at the time of taking up the amorphous ribbons by using the take-up device equipped with a plurality of the take-up rolls having magnetism on the surfaces and realizes stable changing of the take-up rolls without trobles such as a fracture of the ribbons and winding deviation. <P>SOLUTION: The take-up device takes up the amorphous ribbons having the magnetism on the surfaces by two or more units of the take-up rolls having the magnetism on the surfaces by using quick cooling rolls. The take-up roll changing device for the amorphous ribbons having the magnetism on the surfaces is characterized in that the device has a plurality of the press rolls to press and contact the cast amorphous ribbon to the next press rolls at the time of changing the take-up rolls in the progressing direction of the amorphous ribbons and that knife blades for cutting the amorphous ribbons are disposed between the plurality of the press rolls. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to an apparatus and a method for winding an amorphous ribbon cast using a quenching roll on-line using a winding device comprising a plurality of winding rolls.

  The rapid solidification method for producing an amorphous ribbon includes a single roll method and a twin roll method, and the most common method is a single roll method. This single roll method is a method in which molten metal is jetted onto the surface of a cooling roll rotating at high speed, and rapidly solidified on the cooling roll to obtain an amorphous ribbon continuously. When manufacturing on an industrial scale, it is usually necessary to collect the rapidly solidified amorphous ribbon by winding it. Until now, various methods and apparatuses have been proposed for winding an amorphous ribbon on-line immediately after casting. Generally, a winding roll is used to wind the amorphous ribbon by rotating the winding roll. Methods and apparatus are employed. For example, Patent Document 1 discloses the range of the roll speed of the winding roll when capturing the tip of the amorphous ribbon using a winding roll having a magnetic amorphous ribbon on the surface. A winding method of 90% or more and less than 100% is proposed. However, it is necessary to balance the winding conditions such as casting speed, winding speed, tension, etc., because winding using only one winding roll has restrictions on the winding weight on equipment. Normally, winding is performed using a plurality of winding rolls. Examples of the winding device using a plurality of winding rolls include a carousel type winding device composed of two or more winding rolls having a magnetic surface.

  When winding a cast ribbon continuously with a plurality of winding rolls, it is necessary to switch the winding roll, but it is possible to instantly switch to another winding roll with a winding roll having a magnetic surface. It has been difficult to stably wind up an amorphous ribbon. Therefore, in Patent Document 2, the next winding roll that rotates at a high speed is entered from below into the ribbon pass line that is being wound, and the winding roll is brought into contact with the ribbon to limit the space between the two winding rolls. A method of cutting at a position and winding around the next winding roll has been proposed. In this proposal, the relationship between the distance L1 between the cutting position and the next winding roll and the distance L2 between the next winding roll and the cooling roll is L1 ≧ L2 / 20, and the ribbon speed and winding This is a method of switching the roll speed difference within ± 2 m / sec.

  However, in the method disclosed in Patent Document 2, when the winding amount of the amorphous ribbon is constant, the positional relationship between the amorphous ribbon to be cut and the cutting blade is constant, and switching to cutting is possible without any trouble. However, if the winding amount is different from the planned amount, the winding thickness will be different, and as a result, the relationship between the amorphous ribbon to be cut and the blade will not be constant and cutting will be performed well. In some cases, cutting failure or winding of the amorphous ribbon occurs, and switching cannot be performed. Therefore, in order to stabilize the switching, a detection device such as the winding thickness, the positional relationship between the amorphous ribbon and the cutting blade, an angle control device for the cutting blade, and the like are required. It becomes difficult to switch.

JP-A-8-318352 JP 11-28552 A

  The present invention uses a winding device having a plurality of winding rolls having magnetism on the surface, and when winding an amorphous alloy ribbon, it is simple and inexpensive regardless of the amount of winding, and the ribbon The present invention provides an amorphous ribbon winding roll switching apparatus and method that realizes stable switching of a winding roll without any trouble such as breakage or winding deviation.

  The present invention has been made to solve the above-mentioned problems, and the gist of the present invention is that two or more winding rolls having magnetized amorphous ribbons cast with a quenching roll and magnetized on the surface. A plurality of holding rolls in the advancing direction of the amorphous ribbon that press the cast amorphous ribbon and contact the next winding roll when switching the winding roll And a winding roll switching device for the amorphous ribbon having magnetism, wherein a blade for cutting the amorphous ribbon is provided between the plurality of pressing rolls, and using a quenching roll In the method of winding the amorphous ribbon having magnetism cast by using two or more winding rolls having magnetism on the surface, when the winding roll is switched, the cast amorphous ribbon is Next press roll with multiple holding rolls in the direction of the amorphous ribbon An amorphous ribbon winding roll characterized in that after the contact is made even after contact, the ribbon is cut with a blade for cutting the ribbon provided between the pressing rolls and switched to the next winding roll. Switching method.

  The present invention relates to a winding device comprising two or more winding rolls having magnetism on the surface, and when the winding roll is switched, the amorphous thin ribbon cast on the next winding roll is made amorphous. By pressing with a plurality of pressing rolls in the advancing direction of the ribbon and cutting the amorphous ribbon with a blade for cutting the ribbon provided between the pressing rolls, the amount of ribbon taken up by the previous roll can be reduced. To provide a switching device for a winding roll of an amorphous ribbon that can always cut at the same position of the amorphous ribbon and the cutting blade regardless of fluctuations in the pass line due to the size, etc. Can do.

  The present invention will be described with reference to the drawings. FIG. 1 is a schematic diagram showing a schematic configuration example of an amorphous ribbon take-up roll switching device according to the present invention in the case where a carousel system having two take-up rolls is adopted. Fig. 2 shows the next winding roll pressed against the amorphous ribbon being wound by the pressing roll (Figs. 1-6 show an example in which two pressing rolls are arranged in the direction of movement of the amorphous ribbon). FIG. 3 is a schematic diagram showing a state in which the amorphous ribbon is cut with a cutting blade, and FIG. 4 is an amorphous view on the next winding roll after cutting the amorphous ribbon. FIG. 5 is a schematic diagram showing a state in which a thin ribbon is wound, FIG. 5 is a schematic diagram showing a state in which the press roll is retracted, and FIG. 6 is a schematic diagram showing a state in which winding is started with the next winding roll. FIG. The winding roll switching process will be described with reference to FIGS.

  In FIG. 1, the molten metal 2 in the tundish 1 is sprayed onto the surface of the cooling roll 4 rotating at high speed via the nozzle 3, rapidly solidified to form an amorphous ribbon C, and close to the cooling roll 4. The carousel type winding device 5 is wound up. This carousel type winding device 5 has a structure in which it is wound up alternately by winding rolls 6, 7 provided at opposing positions, and after a certain amount is wound up by one winding roll 6. The winding operation is performed by switching the winding to another winding roll 7 that is opposed. These winding rolls 6 and 7 have a function of embedding permanent magnets on the surface of each roll, capturing the leading end of the ribbon C with the force of the magnet, and then winding it by rotating the winding roll. A cutting device 8 connected to a drive mechanism (not shown) provided separately is disposed above the winding device 5. The cutting device 8 includes two pressing rolls 11 and 12 arranged at the leading end of an arm 9 in the traveling direction of the amorphous ribbon, and is positioned approximately in the middle of the pressing rolls 11 and 12 and has a ribbon pass line. A cutting mechanism 10 having a built-in cutting blade 13 is connected to P in a direction entering from above. The two pressing rolls 11 and 12 have a rotation axis parallel to the rotation axis of the winding rolls 6 and 7, and have the same width as the winding rolls 6 and 7. The press rolls 11 and 12 need only have a width equal to or greater than the width of the thin ribbon in order to stably hold the amorphous ribbon C, and the diameter of the press roll is less than the stroke of the cutting blade 13. good. Further, the cutting device 8 is configured to rotate in an arc shape so as to be close to the winding roll 6 at the time of cutting the ribbon C. In this example, the cutting device 8 is rotated in an arc shape, but may be a device that is driven in the vertical direction to approach the winding roll 6.

  In the winding process of FIG. 1, in a steady state, the next winding roll 7 facing the winding roll 6 is the amorphous ribbon C in the pass line P formed by the surface of the cooling roll 4 and the winding roll 6. The amorphous ribbon C is wound up in a state of waiting before coming into contact with the surface. Here, the winding roll 7 rotates in the moving direction of the pass line P at a surface speed substantially equal to the moving speed of the pass line P (amorphous ribbon C).

  Next, as shown in FIG. 2, when the take-up roll 6 has taken up a certain amount of the amorphous ribbon C, the cutting device 8 is viewed from above between the take-up roll 6 and the next take-up roll 7. Is rotated in an arc from the position A to the position B, the amorphous ribbon C is pressed by the two pressing rolls 11 and 12 incorporated in the cutting mechanism 10, and the next winding roll 7 is amorphous. The strip C is brought into contact with 1/2 or less of the winding roll circumference, preferably at least 50 mm or more. At this time, by arranging a plurality of pressing rolls (in this example, two pressing rolls 11 and 12), regardless of the winding amount of the winding roll 6, and further regardless of the size of the cooling roll 4. (In normal use, the diameter of the cooling roll 4 decreases because grinding and polishing are performed), and the pass line P ′ of the amorphous ribbon cutting portion formed by the pressing rolls 11 and 12 always has a fixed positional relationship.

  Further, as shown in FIG. 3, a cutting blade raising and lowering mechanism (not shown) provided separately with a cutting blade 13 provided between the pressing rolls 11 and 12 brought into contact with the amorphous ribbon C is operated, The cutting blade is lowered to contact the amorphous ribbon C and cut. At this time, since the pass line P ′ of the amorphous ribbon is always in a constant positional relationship, the relationship between the amorphous ribbon and the cutting blade 13 is also constant, and the cutting of the amorphous ribbon is stable and can be switched. Stabilize.

  As shown in FIGS. 4 to 6, the cut amorphous ribbon C has its tip captured by the magnetic force on the surface of the next winding roll 7 and starts winding. Here, the reason for bringing the amorphous ribbon C into contact with 1/2 or less of the winding roll circumferential length is that not only the lowering of the arm 9 but also the expansion / contraction mechanism in order to make contact with more than 1/2 of the cooling roll circumferential length. This is because the equipment becomes complicated and the equipment becomes expensive. Further, the reason why the contact length is preferably 50 mm or more is that the winding roll having a magnetic force on the surface (the magnetic force on the surface is 1000 G or more) is not 100% if the amorphous ribbon is contacted by 50 mm or more. This is because it has been experimentally found that the tip of the crystalline ribbon can be captured. After starting winding on the next winding roll 7, the cutting device 8 is retracted and returned to the original position. When winding is started with the winding roll 7, the winding roll 6 that has wound the amorphous ribbon is extracted by a winding roll changer (not shown), and a new winding roll is mounted. The winding roll 6 wound with the amorphous ribbon is transported by a transport device (not shown) and sent to the next step. After the new take-up roll is installed, the position of the take-up roll 7 is reversed so that the take-up roll 6 is continually taken up at the position of the take-up roll 6. The series of operations is repeated to continue the take-up operation. Will be.

本発明例においては巻取厚みがＮｏ．１〜７に示す通り２０〜３００ｍｍの範囲で変動しても巻取ロールの切り替えは問題なく可能である。比較例では設定した巻取厚みがＮｏ．１１〜１２に示す通り１５０〜２００ｍｍの範囲では問題なく切り替え可能であるが、Ｎｏ．９および１２に示す通り設定厚みから離れるに従い巻きずれが発生し、Ｎｏ．８，１３，１４に示す通り１００ｍｍ以上巻取厚みが外れると切断不良が発生し巻取ロールの切り替えが不可能となる。 As an example of the present invention, an amorphous ribbon comprising atomic percent, Fe: 80.5%, B: 15.0%, Si: 3.0%, C 1.0%, and the balance of inevitable impurities. Casting and switching between winding and winding rolls were attempted. The nozzle opening shape used for casting was 170 mm × 0.85 mm. Further, the amount of the molten alloy melted by the high frequency induction method was 50 kg / min, and it was jetted onto the surface of an internal water-cooled cooling roll made of a copper alloy to form an amorphous ribbon. The cooling roll had a diameter of 1198 mm, a width of 250 mm, a thickness of 19 mm, and a surface speed of 22 m / s. The winding roll had a diameter of 600 mm, a width of 375 mm, a magnetic force on the surface of 2000 G, a surface speed of 22 m / s, and a contact length of 30 cm.
As a comparative example, L1 = 30 cm and L2 = 5 m were set by the method disclosed in Patent Document 2, and the other amorphous ribbons were manufactured under the same casting conditions as the present invention example, and the winding and winding rolls were switched. Tried. In both the inventive example and the comparative example, switching was performed by changing the winding amount. The results are shown in Table 1.

In the example of the present invention, the winding thickness is No. Even if it fluctuates in the range of 20 to 300 mm as shown in 1 to 7, switching of the winding roll is possible without any problem. In the comparative example, the set winding thickness is No. In the range of 150 to 200 mm as shown in FIGS. As shown in Nos. 9 and 12, winding deviation occurs as the distance from the set thickness increases. As shown in 8, 13 and 14, when the winding thickness is more than 100 mm, cutting failure occurs, and the winding roll cannot be switched.

It is a schematic diagram (side view) which shows the schematic structural example of the winding roll switching apparatus of the amorphous ribbon by this invention. It is a schematic diagram (side view) which shows the state which pressed the amorphous ribbon in winding by this invention with the pressing roll, and was made to contact with the following winding roll. It is a schematic diagram (side view) which shows the state which cut | disconnected the amorphous ribbon with the cutting blade at the time of winding roll switching by this invention. It is a schematic diagram (side view) which shows the state by which the amorphous ribbon was wound around the next winding roll by this invention. It is a schematic diagram (side view) which shows the state which the press roll retracted | retreated after the amorphous ribbon switching by this invention. It is a schematic diagram (side view) which shows the state by which winding was started with the next winding roll by this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Tundish 2 Molten metal 3 Nozzle 4 Cooling roll 5 Carousel type winding device 6 Winding roll 7 Winding roll 8 Cutting device 9 Arm 10 Cutting mechanism 11 Pressing roll 12 Pressing roll 13 Cutting blade C Amorphous ribbon P path Line P 'Pass line A Cutting device standby position B Cutting device operating position

Claims (2)

  A winding device for winding a magnetic amorphous thin ribbon cast using a quenching roll with two or more winding rolls having magnetism on the surface, which is cast when the winding roll is switched. A blade that has a plurality of pressing rolls in the advancing direction of the amorphous ribbon and presses the amorphous ribbon and cuts the amorphous ribbon between the plurality of pressing rolls. A winding roll switching device for amorphous ribbon having magnetism, characterized by comprising:   In the method of winding the amorphous amorphous ribbon cast using the quenching roll using two or more winding rolls having magnetism on the surface, the amorphous cast when switching the winding roll The thin ribbon is pressed against the next winding roll with a plurality of pressing rolls in the advancing direction of the amorphous ribbon, and then the previous ribbon is cut with a blade for cutting the ribbon provided between the pressing rolls. A method for switching a winding roll of an amorphous ribbon, characterized by cutting and switching to the next winding roll.

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