JP2008093679A - Method and apparatus of changing winding roll for thin amorphous belt - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a method and an apparatus of changing a winding roll for an thin amorphous belt which are simple and inexpensive and also the winding roll can be surely changed without breaking the thin belt when winding the thin amorphous alloy belt by using a winding device provided with a plurality of winding rolls having the magnetized surface. <P>SOLUTION: In the method of winding the thin amorphous belt which is cast by using quenching rolls by using two or more winding rolls, by this method of changing the thin amorphous belt, when changing the winding rolls to the next winding roll, the winding roll is changed by rolling-in the nose part of the thin amorphous belt after changing after pressing it against the surface of the next winding roll with a guide devices. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to an on-line method and apparatus for winding an amorphous ribbon cast using a quenching roll, using a winding device including 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.
Further, as a winding device using a plurality of winding rolls, there is 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 set to L1 ≧ L2 / 20, and the ribbon speed and the winding speed are further set. This is a method of switching the roll speed difference within ± 2 m / sec.

  However, in the method disclosed in Patent Document 2, the tip of the cut amorphous ribbon is captured by the next winding roll, but the amorphous ribbon still breaks immediately after switching, such as the amorphous ribbon is broken. There was a case where the take-up could not be continued, and the take-up roll could not be switched reliably.

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, inexpensive, and reliably wound without breaking the ribbon. An amorphous ribbon winding roll switching method and apparatus capable of switching rolls are provided.

  The present invention has been made in order to solve the above-mentioned problems, and the gist of the present invention is (1) a method of winding an amorphous ribbon cast using a quenching roll using two or more winding rolls. When switching to the next take-up roll, the leading end of the amorphous ribbon after the change is pressed against the surface of the next take-up roll by the guide device, and then the roll is switched. In a method for switching a crystalline ribbon, (2) in a method for winding an amorphous ribbon having magnetism cast using a quenching roll using two or more winding rolls having magnetism on the surface, When switching the take-up roll, the amorphous ribbon is brought into contact with the next winding roll, the ribbon is cut between the winding roll and the next winding roll, and the cut amorphous ribbon tip is Before winding on the next winding roll, the next winding roll Next, the tip of the amorphous ribbon cut by the guide device installed in the vicinity of the next winding roll at the position from the contact position with the amorphous ribbon to the winding of the amorphous ribbon is next A method for switching an amorphous ribbon, wherein the amorphous ribbon is wound after being pressed against the surface of the take-up roll, and the winding roll is switched. (3) Amorphous amorphous material cast using a quenching roll A winding device for winding a thin ribbon with two or more winding rolls having magnetism on the surface. When the winding roll is switched, the cast amorphous ribbon is used as the next winding roll. It has a cutting mechanism for cutting the amorphous ribbon after being contacted, and the position from the contact position with the amorphous ribbon in the next winding roll circumferential direction until the amorphous ribbon is wound, Close to the next take-up roll and press the tip of the cut amorphous ribbon against the take-up roll surface (4) Two or more amorphous thin ribbons having magnetism cast using a quenching roll and having magnetism on the surface Winding device for winding with a winding roll of the above, when switching the winding roll, press the cast amorphous ribbon and contact the next winding roll with the pressing roll to move the amorphous ribbon And a blade for cutting the amorphous ribbon is provided between the plurality of pressing rolls, and the amorphous thin film is formed from the position of contact with the amorphous ribbon in the circumferential direction of the next winding roll. (3) The guide device for pressing the front end of the cut amorphous ribbon to the surface of the take-up roll is provided at a position until the belt is wound. An amorphous ribbon switching device.

  The present invention provides a winding device composed of two or more winding rolls having magnetism on the surface, and when the winding roll is switched, the cut amorphous thin ribbon tip is wound on the next winding roll. In the meantime, at the position from the position of contact with the amorphous ribbon in the circumferential direction of the next winding roll to the winding of the amorphous ribbon, the tip of the cut amorphous ribbon is next guided by the guide device. Switching the winding roll of the amorphous ribbon that prevents the trouble such as fracture of the amorphous ribbon that occurred immediately after switching by winding it after pressing on the surface of the winding roll, and enables the switching reliably A method and switching device can be provided.

  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 when a carousel system having two take-up rolls is adopted. FIG. 2 shows the amorphous ribbon being wound by the pressing roll (FIGS. 1 to 6 show an example in which two pressing rolls are arranged in the advancing direction of the amorphous ribbon) and contact the next winding roll. FIG. 3 is a schematic diagram showing a state in which the amorphous ribbon is cut with a cutting blade, and FIG. 4 is a diagram showing the next winding roll after the amorphous ribbon is cut. Fig. 5 is a schematic diagram showing a winding start state after the leading end of the ribbon is captured and the leading end of the amorphous ribbon is pressed against the surface of the winding roll by the guide device. FIG. 6 is a schematic diagram showing a retracted state. FIG. 6 is a schematic diagram showing a state where winding is started by the next winding roll. 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 the winding rolls 6 and 7 are alternately wound at opposite positions, and after winding a certain amount by one winding roll 6, The winding operation is performed by switching the winding to another winding roll 7 facing the other. 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.
As shown in FIG. 2, the next winding roll 7 is brought close to the winding roll 7 at a position R from the contact position M with the amorphous ribbon in the circumferential direction to the winding of the amorphous ribbon. 14 is installed. The guide device 14 is arranged in the axial direction of the take-up rolls 6 and 7 so as not to interfere with the equipment as shown in FIG. 8 when the take-up starts or when the carousel type take-up device 5 is rotated after the take-up roll is switched. The moving mechanism 17 is provided so as to move to a guide position E close to the winding roll 7 as shown in FIG. ing. In this example, the example of movement of the winding roll axis is shown, but the moving mechanism is not limited as long as it does not interfere with the equipment such as moving in the direction perpendicular to the surface of the winding roll. The guide device 14 takes up the amorphous ribbon end portion T shown in FIG. 3 on the surface of the take-up roll 7 and the next roll of the amorphous ribbon end portion T after passing through the guide roll 15 and the guide roll 15. It comprises a guide plate 16 for introduction into the roll-in part R of the roll 7 (see FIG. 1). The guide roll 15 and the guide plate 16 are preferably made of a non-magnetic material such as aluminum so as not to be affected by the permanent magnet embedded in the surface of the take-up roll, but a magnetic material may be used. The gap G1 between the guide roll 15 and the take-up roll 7 and the gap G2 between the guide plates 16 are 1 mm or more and 200 mm or less, preferably 1 mm or more and 100 mm or less. The reason for setting the gap G1 in the above range is that when the gap G1 is 200 mm or more, the effect of pressing the amorphous ribbon tip portion F against the take-up roll 7 is reduced, and when the gap G1 is 1 mm or less, the amorphous ribbon tip portion T is reduced. It is because it became difficult to pass through the guide roll 15 and the guide plate 16 experimentally. Further, the width of the guide roll 15 and the guide plate 16 only needs to be equal to or greater than the width of the amorphous ribbon, and the roll diameter and the plate thickness are not particularly limited. It is necessary to prevent it from occurring. In this example, the guide roll 15 and the guide plate 16 are used as the guide device 14 for pressing the amorphous ribbon tip portion T against the surface of the take-up roll 7, but the amorphous ribbon tip portion T is used as the take-up roll. 7 may be provided alone, such as a guide roll, a semi-cylinder, a triangular column, a quadrangular column, or a guide plate as shown in FIG. 9 (the gap on the entrance side of the amorphous ribbon is wide). A structure that narrows gradually is preferable), and a plurality of the above shapes may be combined. However, an appropriate gap is set in advance by experiments or the like.

  A cutting device 8 connected to a drive mechanism (not shown) provided separately is disposed above the winding device 5 of FIG. 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). The guide device 14 stands by in the vicinity of the winding roll 7 at the position from the contact position with the amorphous ribbon in the circumferential direction to the next winding roll 7 until the amorphous ribbon is wound. In a steady state, the guide device 14 moves from the retracted position F shown in FIG. 8 to the guide position E shown in FIG.

  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 / 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 and brought into contact with the amorphous ribbon C for cutting, but since the pass line P ′ of the amorphous ribbon is always in a fixed positional relationship, the amorphous ribbon and the cutting blade 13 The relationship is also constant and the cutting of the amorphous ribbon is stable.

As shown in FIG. 3, the cut amorphous ribbon C captures the tip by the magnetic force on the surface of the next winding roll 7.
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.

The tip portion T of the amorphous ribbon captured at this time is folded back by air resistance as shown in FIG. As shown in FIG. 4, the leading end portion T is pressed against the take-up roll 7 by the guide roll 15 by the guide device 14, and further the amorphous thin strip pressed against the take-up roll 7 by the guide plate 16 is applied to the take-up portion R. Guide the amorphous ribbon tip.
Although the present inventors stably realized the cutting of the amorphous band and the capture of the tip, the reason for the amorphous ribbon to break and rewinding failure when the casting speed, plate thickness, etc. are changed However, as a result of analyzing the state at the time of switching by installing a high-speed video, it was found that the folded shape of the leading end portion T of the amorphous ribbon is caused. That is, it has been found that when the shape of the folded tip portion T swells greatly, the amorphous ribbon is broken at the winding portion R of the amorphous ribbon. For this reason, the leading end portion is pressed against the take-up roll 7 by the guide roll 15 to prevent the folded portion of the amorphous ribbon leading end portion T from expanding, and the guide plate 16 presses against the take-up roll 7. It has been found that by switching the ribbon to the entrainment portion R, switching can be performed without causing the ribbon to break under any conditions.

  After the leading end of the amorphous ribbon is wound on the next winding roll 7, the cutting device 8 is retracted and returned to the original position as shown in FIG. 5, and the guide device 14 is also installed in the facility as shown in FIG. Retreat to the retreat position F so as not to interfere. When the winding roll 7 starts winding as shown in FIG. 6, the winding roll 6 wound with the amorphous ribbon is extracted by a winding roll changer (not shown), and a new winding roll is taken up. Installing. 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 mounted, the take-up roll 7 is rotated at the position of the take-up roll 6 so that the take-up roll 6 is constantly taken up. The series of steps is repeated to continue the take-up. It will be.

本発明例のＮｏ．１〜１０においては鋳造速度および板厚が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が、比較例のＮｏ．１１〜２０では鋳造速度が遅い場合には板厚にかかわらず切り替えは可能であるが、鋳造速度が速くなり、また板厚が厚くなると非晶質薄帯の切断及び先端補足は良好であるが、非晶質薄帯巻き込み時に破断が発生し巻取ロールの切り替えが不可となる。 As an embodiment of the present invention, an amorphous ribbon comprising Fe: 80.5%, B: 15.0%, Si: 3.0%, C 1.0% and the balance of inevitable impurities is cast as atomic percent. The casting roll and the sheet thickness were changed using the apparatus shown in FIG. The nozzle used for casting had an opening shape of 170 mm × 0.85 mm, and 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, and a wall thickness of 19 mm. The winding roll had a diameter of 600 mm, a width of 375 mm, a magnetic force of 5 mm from the surface of 350 G or more, and a contact length of 30 cm. As shown in FIG. 7, the guide device has a structure in which a guide roll and a guide plate are combined. The guide roll is made of aluminum, has a width of 200 mm, a roll diameter of φ60 mm, and a gap with the winding roll of 15 mm. The guide plate was made of aluminum having a length of 200 mm and a length of 300 mm, and the gap between the guide plate exit guide plate and the take-up roll was 5 mm.
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, the winding thickness on the winding roll was about 200 mm, and the switching was performed by changing the casting speed and the plate thickness. The results are shown in Table 1.

No. of the example of the present invention. In Nos. 1 to 10, even if the casting speed and the plate thickness vary, the winding roll can be switched without any problem. In the case of 11 to 20, when the casting speed is slow, switching is possible regardless of the plate thickness, but when the casting speed is fast and the plate thickness is thick, the cutting of the amorphous ribbon and the tip supplementation are good. When the amorphous ribbon is wound, a breakage occurs and the winding roll cannot be switched.

The schematic diagram (side view) which shows the winding roll switching apparatus of the amorphous ribbon by this invention. The schematic diagram (side view) which shows the winding roll switching state by this invention. The schematic diagram (side view) which shows the cutting | disconnection state of the amorphous ribbon at the time of winding roll switching by this invention. The schematic diagram (side view) which shows the winding state immediately after winding of the amorphous ribbon by the switched winding roll by this invention. The schematic diagram (side view) which shows the winding state by the switched winding roll by this invention. The schematic diagram (side view) which shows the state of the winding continuation by the switched winding roll by this invention. The schematic diagram which shows the guide position of the guide apparatus by this invention. The schematic diagram which shows the retracted position of the guide apparatus by this invention. The schematic diagram which shows another example of a form of the guide apparatus 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 14 Guide device 15 Guide roll 16 Guide Plate 17 Guide position moving mechanism C Amorphous ribbon P Pass line P 'Pass line A Cutting device standby position B Cutting device operating position E Guide device guide position F Guide device retracted position G1 Guide roll and winding G2 Gap between the guide plate and the take-up roll M Contact position between the take-up roll 7 and the amorphous ribbon R Amorphous ribbon entrainment part T Amorphous ribbon tip after cutting

Claims (4)

  In the method of winding an amorphous ribbon cast using a quenching roll using two or more winding rolls, when switching to the next winding roll, the tip of the amorphous ribbon after switching is A method for switching an amorphous ribbon, wherein the winding roll is wound after being pressed against the surface of the next winding roll by a guide device, and the winding roll is switched.   In the method of winding a magnetic amorphous thin ribbon cast using a quenching roll using two or more winding rolls having magnetism on the surface, when the winding roll is switched, the next winding is performed. The amorphous ribbon is brought into contact with the roll, the ribbon is cut between the winding roll and the next winding roll, and the next end of the cut amorphous ribbon is wound on the next winding roll. The amorphous film cut by the guide device installed in the vicinity of the next winding roll at a position from the contact position with the amorphous ribbon in the circumferential direction of the winding roll to the winding of the amorphous ribbon. A method for switching an amorphous ribbon, comprising: pressing a leading end of a ribbon against a surface of a next winding roll, and then winding the amorphous ribbon to switch a winding roll.   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. Having a cutting mechanism for cutting the amorphous ribbon after the amorphous ribbon is brought into contact with the next winding roll, and from the contact position with the amorphous ribbon in the circumferential direction of the next winding roll A guide device for pressing the tip of the cut amorphous ribbon to the surface of the winding roll is provided near the next winding roll at a position until the amorphous ribbon is wound. Switching device for crystalline ribbon.   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. There are a plurality of pressing rolls that hold the amorphous ribbon in contact with the next winding roll in the traveling direction of the amorphous ribbon, and the amorphous ribbon is cut between the plurality of pressing rolls. A cut amorphous ribbon adjacent to the next winding roll at a position from the contact position with the amorphous ribbon in the circumferential direction of the next winding roll to the position where the amorphous ribbon is wound. 4. A switching device for an amorphous ribbon according to claim 3, further comprising a guide device for pressing the tip of the wire against the surface of the winding roll.

Images