JP3683538B2 - Metal ribbon casting equipment - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a metal ribbon casting apparatus, and more specifically, a metal thin film installed on a movable carriage that can be inserted into and pulled out from a main body of the metal ribbon casting apparatus by a cooling roll for rapidly cooling molten metal. The present invention relates to a band casting apparatus.
[0002]
[Prior art]
It has already been carried out to produce a ribbon-like, powder-like or flake-like casting by quenching a molten metal, and many techniques have been proposed and put into practical use. For example, FIG. 5 is a perspective view of a continuous strip manufacturing apparatus 200 exemplified in Japanese Patent Publication No. 59-42586, and includes a reservoir 208 having an induction heating coil 209 for holding molten metal of an iron alloy or a copper alloy, and a cooling roll. 207. The reservoir 208 is connected to the slotted nozzle 210, and the nozzle 210 is attached very close to the outer peripheral cooling surface of the cooling roll 207. Although not shown, the reservoir 208 is provided with means for applying pressure to discharge the molten metal from the nozzle 210. That is, in this continuous strip manufacturing apparatus 200, the molten metal in the pressurized reservoir 208 is discharged from the nozzle 210 to the outer peripheral cooling surface of the cooling roll 207 rotating at an interval of 0.15 mm, for example, and solidified immediately. Thus, a continuous strip 211 having a thickness of 0.05 mm is formed. However, in Japanese Examined Patent Publication No. 59-42586, there is no description about the attachment of the reservoir 208 provided with the slotted nozzle 210 and the cooling roll 107 and the positioning thereof.
[0003]
Also, JP-A-5-222488, JP-A-6-84624, and JP-A-8-229641 disclose that the molten metal is discharged from the melting furnace to the tundish, and the outer periphery of the cooling roll rotating from the tundish is cooled. Although a method of strip casting on a surface to obtain a strip-shaped casting having a thickness of 0.2 to 0.5 mm is disclosed, these are similarly applied to attachment of a tundish and a cooling roll and positioning thereof. There is no description.
[0004]
(Conventional example 1)
Usually, the cooling roll is often fixedly installed in a one-to-one combination with the tundish directly under the tundish (or reservoir) in the metal ribbon casting apparatus. For example, FIG. 3 is a front view drawn to show the internal configuration of the metal ribbon casting apparatus 101 of Conventional Example 1 for casting a metal ribbon in a vacuum or an inert gas atmosphere, and FIG. FIG. 6 is a similar cross-sectional view in the [4]-[4] line direction. Referring to FIGS. 3 and 4, in the metal ribbon casting apparatus 101, main components are installed in a main body 103 surrounded by a frame 102 which is a strength member and a wall surface 102 w. That is, the main body 103 is defined by an inner partition wall 104 into an upper melting chamber 110 and a lower roll chamber 120. The melting chamber 110 includes a melting furnace 111 (not shown in FIG. 3) and a tundish 115. And a cooling roll 121 is installed in the roll chamber 120.
[0005]
As shown in FIG. 4, the melting furnace 111 of the melting chamber 110 is tilted around the tilting shaft 112 to discharge the molten metal inside to the tundish 115. The tundish 115 is installed on the partition wall 104, and a lower end portion where the nozzle slit 116 is formed in the axial direction of the cooling roll 121 is slightly suspended from the partition wall 104. Then, the pressure in the melting chamber 110 is set to a value higher than the pressure in the roll chamber 120, and the molten metal inside is cast from the nozzle 116 to the outer peripheral cooling surface of the cooling roll 121 that rotates in the direction of the arrow in the roll chamber 120. As shown in FIG. 3, the rotary shaft 122 of the cooling roll 121 is supported by a support 123 provided in the side wall 102 w of the main body 103 and the roll chamber 120, and a rotary bearing 125 that rotatably supports the rotary shaft 122. The other end of the rotating shaft 122 is a universal joint 126 including a water supply pipe provided in the rotating shaft 122 for water cooling the cooling roll 121, a water supply port 126i for connection to the drain pipe, and a drain port 126d. The belt is driven by a timing belt 129 wound between a pulley 124 attached to the rotary shaft 122 between the side wall 102w and the universal joint 126 and a pulley 128 of a drive motor 127 installed on a floor mount. The
[0006]
(Conventional example 2)
On the other hand, in Japanese Patent Application No. 2000-234958 of an earlier application by the applicant of the present application, a melting casting chamber under vacuum is provided via a preparation chamber that is installed in a movable carriage and capable of evacuation adjacent to the melting casting chamber. A cooling roll that reciprocates between the atmosphere side is disclosed. That is, by preparing a plurality of mobile trolleys equipped with such cooling rolls, casting can be continuously performed by replacing with other cooling rolls during maintenance and inspection of one cooling roll, thereby improving production efficiency. You can do that.
[0007]
[Problems to be solved by the invention]
Cooling rolls in metal ribbon casting equipment are often made smooth surfaces made of copper or copper alloy, and at least the outer peripheral cooling surface is often mechanically and thermally damaged. When the cooling surface becomes rough, a uniform rapid cooling effect cannot be expected, so that the surface is polished almost constantly. When the surface is roughened, it is rotationally ground by a cutting tool. Further, since the above maintenance is frequently performed, the cooling roll is periodically replaced as a consumable item. Therefore, how quickly these operations can be performed dominates the productivity of castings such as metal ribbons.
[0008]
In view of the above, in the metal ribbon casting apparatus 101 of Conventional Example 1, the cooling roll 121 is fixedly installed in the narrow roll chamber 120 with the cooling roll 121 positioned directly below the tundish 112 in the main body 103, It is extremely difficult to grind the roughened cooling surface of the cooling roll 121 in the roll chamber 120. Further, when replacing the cooling roll 121, an operation close to disassembling the main body 103 is required. Further, although not shown, a scraper, a brush roll, and a baffle are attached in the vicinity of the outer peripheral cooling surface of the cooling roll 121, but it is extremely difficult to attach these to the periphery of the cooling roll 121 in the roll chamber 120. Cost.
[0009]
In the cooling roll of Conventional Example 2, when the cooling roll is in the melt casting chamber, the two flexible hoses connecting the cooling water supply end, the drain end and the cooling roll provided in the preparation chamber are melt casting. It is necessary to pass through an internal door that shuts off the chamber and the preparation chamber, and it is somewhat difficult to maintain the melting casting chamber at a predetermined degree of vacuum, and a preparation chamber is provided in addition to the melting casting chamber. The size of the apparatus is slightly increased and the total apparatus cost is increased, such as a door and an external door that shuts off the preparation chamber and the atmosphere side.
[0010]
The present invention has been made in view of the above-described problems, and provides a metal ribbon casting apparatus that can easily insert, position, and maintain a cooling roll without increasing the apparatus cost, and can greatly improve productivity. The task is to do.
[0011]
[Means for Solving the Problems]
The above problem can be solved by the configuration of claim 1, and the means for solving the problem will be described as follows.
[0012]
The metal ribbon casting apparatus according to claim 1 supplies a molten metal from a tundish nozzle to a cooling surface at the outer periphery of a cooling roll rotating at high speed in an atmosphere of vacuum or inert gas, and rapidly cools to form a metal ribbon. In the metal ribbon casting apparatus, the cooling roll is installed in the moving carriage, and on the other hand, the insertion of the cooling roll on the moving carriage is inserted into the side wall of the main body of the metal ribbon casting apparatus in which the tundish is installed. An opening is formed, and when the cooling roll is inserted, the insertion opening is sealed by a cover plate attached to the movable carriage.
Such a metal ribbon casting apparatus can easily and quickly perform maintenance, inspection and replacement work in a wide place by pulling a cooling roll from the main body of the metal ribbon casting apparatus to the outside. Further, the inside of the main body of the metal ribbon casting apparatus and the atmosphere side can be easily shut off by the cover plate attached to the movable carriage.
[0013]
According to a second aspect of the present invention, the main body of the metal ribbon casting apparatus is defined by an upper melting chamber in which a tundish is accommodated and a lower roll chamber in which a cooling roll is accommodated via a partition wall. The cooling roll installed on the cantilever of the movable carriage is inserted into the roll chamber by the movable carriage together with the cantilever.
In such a metal ribbon casting apparatus, only the roll chamber need only be evacuated from atmospheric pressure at the start of casting, so the time required for evacuation is shortened and the required power is reduced, and the melting chamber and roll chamber are also reduced. The molten metal can be cast from the nozzle / slit of the tundish to the outer peripheral cooling surface of the cooling roll by the differential pressure that can be easily controlled.
[0014]
The metal ribbon casting apparatus according to claim 3 that is dependent on claim 2 is configured such that when the cooling roll is inserted into the roll chamber, a drive motor is installed in a portion of the movable carriage that is on the atmosphere side outside the roll chamber, In this device, the rotating shaft of the cooling roll is fixed to the movable carriage, and is supported by a rotating bearing that penetrates the cover plate and is airtightly rotated.
Such a metal ribbon casting apparatus does not require a special drive motor because the end portions of the drive motor and the rotary shaft are on the atmosphere side, and a cooling passage is provided by providing a refrigerant passage inside the rotary shaft. In the case of cooling, a coolant supply port and a discharge port can be provided at the end of the rotating shaft, so that cooling can be performed easily.
[0015]
The thin metal strip casting apparatus according to claim 4 that is dependent on claim 2 is configured so that the scraper and the cleaning rolls disposed on the outer peripheral cooling surface of the cooling roll are inserted into the roll chamber together with the cooling roll. Is a device that is installed in a portion of the moving carriage on the atmosphere side, and whose drive shaft is fixed to the movable carriage and is pivotally supported by a drive bearing that penetrates the cover plate and is airtightly driven.
Such a metal ribbon casting device can perform maintenance and inspection of cooling rolls, scrapers and cleaning rolls in a wide area outside the main body pulled out by a mobile carriage, and after completion of the maintenance and inspection, the cooling roll A scraper and cleaning rolls can be set on the cooling surface of the outer periphery and inserted into the roll chamber, greatly reducing the time required for these operations and reducing the number of man-hours.
[0016]
The metal ribbon casting apparatus according to claim 5 that is dependent on claim 2 has two positioning members that are horizontally arranged at the tip of the cantilever beam inserted into the main body when the cooling roll is inserted into the main body. This is a device in which the cooling roll is positioned in contact with two stoppers provided corresponding to the body.
Such a metal ribbon casting device accurately reproduces the insertion position of the cooling roll with respect to the tundish and the parallelism of the cooling roll axis with respect to the tundish nozzle by positioning the tip of the cantilever of the movable carriage. Is done.
[0017]
The thin metal strip casting apparatus according to claim 6 that is dependent on claim 2 is an apparatus in which the movable carriage is provided with means for fixing to the floor surface during rotational grinding of the outer peripheral cooling surface of the cooling roll.
In such a metal ribbon casting apparatus, vibration of the cooling roll during grinding of the outer peripheral cooling surface of the cooling roll is suppressed, and a trouble that the grinding bite bites into a depth beyond the plan can be avoided.
[0018]
DETAILED DESCRIPTION OF THE INVENTION
As described above, the metal ribbon casting apparatus of the present invention supplies a molten metal or iron alloy or non-ferrous alloy from a tundish nozzle to the outer peripheral cooling surface of a cooling roll rotating at high speed in a vacuum or inert gas atmosphere. In the metal ribbon casting apparatus that forms a metal ribbon by rapid cooling, the cooling roll is installed on the moving carriage, and on the other hand, the side wall of the metal ribbon casting apparatus on which the tundish is installed is placed on the moving carriage. An insertion opening for inserting the cooling roll from the outside is formed, and when the cooling roll is inserted, the insertion opening is sealed by a cover plate attached to the movable carriage.
[0019]
It is preferable that the moving carriage on which the cooling roll is installed travel along the rail, and the movement becomes easy. The moving carriage may be moved by human power or may be self-propelled with a traveling motor attached. In addition, the moving carriage on which the cooling roll is installed moves the cooling roll in the direction of the rotation axis thereof, and is inserted from the side wall of the main body of the metal ribbon casting apparatus, thereby depending on other components of the metal ribbon casting apparatus. It is easy to avoid three-dimensional obstacles, and the moving distance of the moving carriage can be reduced, and it is easy to obtain merits such as simplifying the shape of the insertion opening provided on the side wall of the main body of the metal ribbon casting apparatus . The insertion opening can be opened and closed by the lid plate simultaneously with the insertion and withdrawal of the cooling roll by the movable carriage by attaching the lid plate to the movable carriage, and no special opening / closing mechanism is required.
[0020]
The metal ribbon casting apparatus may be of a type in which the tundish and the cooling roll are arranged together without dividing the inside of the main body. The inside of the dish is pressurized to cast the molten metal from the nozzle to the cooling roll surface. In this case, the pressure is likely to fluctuate and it is somewhat difficult to keep the cast amount constant. If a cooling roll is installed on a moving carriage and inserted into the main body to cast a thin metal strip, and the cooling roll is to be pulled out from the main body, the entire main body is removed from atmospheric pressure to a predetermined degree of vacuum each time casting is started. It is necessary to evacuate to the point. On the other hand, when the inside of the main body is vertically divided by an internal partition and a melting furnace and tundish are installed in the upper chamber and a cooling roll is installed in the lower chamber, the pressure in the upper chamber is higher than the pressure in the lower chamber. However, it is possible to cast the molten metal from the tundish nozzle by the differential pressure, and it is easy to control the differential pressure. In addition, casting is started by inserting a cooling roll into the lower chamber with a moving carriage and pulling it out. Sometimes only the lower chamber needs to be evacuated from atmospheric pressure, so the time required for evacuation is shortened and the required power is saved.
[0021]
Furthermore, the drive motor for the cooling roll can be inserted into the main body of the vacuum system together with the movable carriage, but by installing it on the atmosphere side outside the main body, the drive motor has a special specification. No longer need it. In order to set the drive motor to the atmosphere side, when inserting the cooling roll, the rotating shaft of the cooling roll is pivotally supported by a rotary bearing that is fixed to the portion of the moving carriage that is on the atmosphere side and penetrates the cover plate, and is airtightly rotated. Cost. In addition, when the cooling roll is cooled with water, for example, a cooling water supply pipe and a drain pipe are provided inside the rotary shaft. Therefore, a universal joint is provided at the end of the rotary shaft to provide an atmosphere side water supply line and It is preferable to use a configuration in which a pulley is provided in the middle of the rotating shaft and the belt is driven in place where the drainage line is connected. Of course, the drive motor may be directly connected to the end of the rotating shaft and rotated, or a gear may be attached to drive the gear, but in those cases, a connection point with a water supply line or a drainage line is provided in the middle of the rotating shaft. Therefore, the configuration of the universal joint is somewhat complicated.
[0022]
Furthermore, there are the following merits because the cooling roll can be inserted and pulled out by the movable carriage. That is, after a molten metal having a high temperature, for example, 1000 ° C. to 1400 ° C. is cast and solidified on the outer peripheral cooling surface of the cooling roll, the metal strip is peeled off from the outer peripheral cooling surface of the cooling roll by a scraper. Since the iron and thin strips remain on the outer cooling surface of the chill roll, the temperature uniformity is lost, and when the chill roll is rotated once and the molten metal is cast, the homogeneity of the resulting metal strip decreases. A brush roll for wiping off impurities on the outer peripheral cooling surface after stripping the ribbon and a baffle for polishing the outer peripheral cooling surface as necessary are disposed on the outer peripheral cooling surface. The drive shafts of these scrapers and rolls are fixed to the movable carriage, are pivotally supported by drive bearings that pass through the cover plate, and are hermetically driven by a drive source installed on the atmosphere side of the movable carriage.
[0023]
With the above configuration, the scraper, brush roll, and baffle are also inserted and withdrawn at the same time when the cooling roll is inserted and withdrawn, so that these maintenance inspections and settings can be easily and quickly performed in a large space. Can be done. In addition, although it is an extraordinary work, when the outer peripheral cooling surface of the cooling roll becomes rough, surface grinding is performed with a cutting tool. In this case, the grinding jig can be mounted and ground in a wide area, and even when the cooling roll is replaced, the cooling roll can be lifted from the movable carriage. Compared to the case, it can be carried out in a very short time and with fewer man-hours.
[0024]
The positioning of the cooling roll is performed by two positioning members arranged horizontally at the tip of the cantilever which is an insertion portion into the main body of the movable carriage, and two stoppers provided on the main body side corresponding to these positioning members. Is done by. For example, a horizontal pin with a conical or frustoconical head is provided on the stopper, and a locking hole having a conical or frustoconical surface is provided on the positioning member at the tip of the cantilever, so that the pin head Cooling rolls against tundish by allowing the conical surfaces to slide in each other when the part is inserted into the locking hole and adjusting the stopper pin mounting position with a fine pitch. And the parallelism of the axis of the cooling roll with respect to the tundish nozzle can be accurately reproduced.
[0025]
If the outer peripheral cooling surface of the cooling roll is damaged and irregularities with a depth greater than or equal to a predetermined depth are formed, the cooling roll is rotated and surface-ground to regenerate a smooth outer peripheral cooling surface. It is necessary to prevent the bite blade from biting beyond the planned depth by vibrating. Any means may be adopted to prevent the vibration of the movable carriage, but for example, a support may be interposed between the cantilever beam and the floor surface of the movable carriage. Furthermore, the fixing jig is firmly fixed so as to prevent the grinding tool from vibrating, so that the tool bite can be more reliably eliminated.
[0026]
【Example】
Next, the metal ribbon casting apparatus of the present invention will be specifically described with reference to the drawings.
[0027]
(Example)
FIG. 1 is a front view showing an entire metal ribbon casting apparatus 1 according to the embodiment and its internal configuration, and FIG. 2 is a similar side view in the [2]-[2] line direction in FIG. Referring to FIGS. 1 and 2, a thin metal strip casting apparatus 1 has a melting chamber 10 and a roll chamber 20 defined vertically through a partition wall 4 in a main body 3 surrounded by a frame 2 made of steel. A melting furnace 11 and a tundish 15 are installed in the melting chamber 10. As shown in FIG. 1, the cooling roll 21 is installed on the cantilever 33 of the movable carriage 31 and is inserted into the roll chamber 20 when casting a thin metal strip, and is indicated by a one-dot chain line during maintenance of the cooling roll 21. Thus, it is pulled out of the main body 3 from the roll chamber 20. During casting of the metal ribbon, the pressure in the melting chamber 10 is maintained higher than the pressure in the roll chamber 20, and a nozzle long in the axial direction of the cooling roll 21 formed at the lower end portion of the tundish 15 by the differential pressure. From the slit 16, for example, a molten metal of a rare earth element-containing iron alloy is cast onto the cooling surface of the cooling roll 21. The main body 3 and the partition wall 4 are provided with ribs 3r and struts 4s for reinforcement. What is shown above the tundish 15 is a tundish upper lid 19 that is pulled up and is in a standby position.
[0028]
As shown in FIG. 2, in the melting chamber 10, a melting furnace 11 having an induction heating cable 14 is supported by a tilting shaft 12, and as shown in FIG. 1, a bearing 13 fixed to the main body 3 is attached to a bearing 13. It is tilted in an airtight manner by a drive shaft of an atmospheric tilting mechanism (not shown) that is pivotally supported, and the molten metal inside is tapped into the tundish 15 as shown in FIG. Further, the tundish 15 provided with the induction heating cable 17 has a lower end portion in which the nozzle / slit 16 is formed slightly hung from the partition wall 4 to the roll chamber 20, and as shown in FIG. The height position can be adjusted by a jack 61 driven by a drive source 18 provided on the outer side. Although not described in detail, the tundish 15 is capable of moving in the horizontal direction and adjusting the inclination of the central axis in addition to the vertical movement by the jack 61. And between the tundish 15 and the partition 4 is airtightly sealed, and the differential pressure between the melting chamber 10 and the roll chamber 20 is maintained.
[0029]
FIG. 1 shows a state in which the cooling roll 21 is inserted into the roll chamber 10 by the cantilever 33 of the moving carriage 31, but the moving carriage 31 is assembled in a frame shape by the shape steel 32. The rotating shaft 22 on the insertion end side is supported by a bearing 23 on a support 34 erected on the cantilever 33, and the rotating shaft 22 on the moving carriage 31 side is connected to the atmosphere side of the moving carriage 31 when the cooling roll 21 is inserted. It is pivotally supported by a rotary bearing 25 that is fixed to this portion and provided through the lid plate 35 and is airtightly rotated. The other end of the rotary shaft 22 on the atmosphere side is a universal joint provided with a water supply pipe provided in the rotary shaft 22 for water cooling the cooling roll 21, a water supply port 26i for connection to the drain pipe, and a drain port 26d. 26.
[0030]
The cooling roll 21 is wound around the pulley 28 of the drive motor 27 and the pulley 24 of the rotary shaft 22 that are installed in the portion of the moving carriage 31 that is on the atmosphere side when the cooling roll 21 is inserted into the roll chamber 20. The belt 29 is driven by the belt 29 to rotate. The movable carriage 31 is a self-propelled type having a running motor 37 and wheels 38 and is drawn along the rail 39 in the direction indicated by the arrow in FIG. Note that the drawn mobile carriage 31 can be fixed with a support column between the cantilever 33 on which the cooling roll 21 is installed and the floor surface, although not shown. Rotate the outer peripheral cooling surface roughened with a cutting bit to prevent the cooling roll from vibrating when regenerating a smooth outer peripheral cooling surface, and the cutting bit of the grinding bite bites beyond the expected depth It is prevented.
[0031]
The insertion of the cooling roll 21 by the movable carriage 31 is performed from the insertion opening 5 formed in the side wall 3w of the main body 3 in FIG. Then, two positioning members 36 provided side by side in the horizontal direction at the tip of the cantilever 33 inserted into the roll chamber 20 together with the cooling roll 21 are provided correspondingly on the bottom surface of the roll chamber 20. The stopper 7 comes into contact with and stops. A horizontal positioning pin 8 having a truncated cone-shaped head is attached to the stopper 7 so as to be adjustable forward and backward, and a positioning pin 8 having a conical surface hole corresponding to the conical surface of the head. When the member 36 contacts the positioning pin 8, the insertion depth of the cooling roll 21 is reproduced with high accuracy. That is, the positioning is performed at two positions at the tip of the cantilever 33, whereby the insertion depth of the cooling roll 21 with respect to the tundish 15 and the parallelism of the axis of the cooling roll 21 with respect to the nozzle / slit 16 of the tundish 15. Is accurately set with good reproducibility. The movable carriage 31 is provided with a cover plate 35 that closes the insertion opening 5 at the time of insertion. The cover plate 35 is bolted to the side wall 3w with a sealing material interposed therebetween, and the insertion opening 5 is sealed.
[0032]
In addition, as shown in FIG. 2, a scraper 41 for detaching the metal ribbon formed on the outer peripheral cooling surface of the cooling roll 21 by casting the molten metal from the cooling roll 21 can be attached to and detached from the outer peripheral cooling surface of the cooling roll 21. It is attached. The scraper 41 is attached to the upper end side of the rod 42 having the lower end portion as a fulcrum, and is attached to and detached from the outer peripheral cooling surface of the cooling roll 21 by the rotation of the rotating cam 43 in contact with the rod 42. As shown in FIG. 1, the rotation cam 43 is rotated by a rotation shaft 44 driven by a rotation drive source 47 installed in a portion that becomes the atmosphere side of the movable carriage 31 when the cooling roll 21 is inserted. However, as in the case of the rotating shaft 22 of the cooling roll 21, the rotating shaft 44 is pivotally supported by being supported by a rotating bearing 45 attached to the movable carriage 31 and penetrating the lid plate 35.
[0033]
Further, as shown in FIG. 2, the outer peripheral cooling surface of the cooling roll 21 is polished with a brush roll 48 for wiping away wrinkles and small thin pieces remaining after the metal ribbon is peeled, and if necessary, the outer peripheral cooling surface is polished. Although not shown in the drawing, these are also driven by a drive source installed in a portion on the atmosphere side of the movable carriage 31 by a mechanism similar to the scraper 41. That is, the scraper 41, the brush roll 48, and the baffle 49 are all set on the outer peripheral cooling surface of the cooling roll 21, and are inserted and pulled out together with the cooling roll 21 by the moving carriage 31.
[0034]
The metal ribbon casting apparatus of the present invention is configured as described above, and its operation will be described next.
[0035]
Referring to FIG. 1, the cooling roll 21 installed on the cantilever 33 of the moving carriage 31 under the atmospheric pressure shown by the one-dot chain line is moved along the rail 39 by the wheel 38 rotated by the traveling motor 37. It is moved and inserted into the roll chamber 20 of the main body 3 from the insertion opening 5 of the metal ribbon casting apparatus 1. At this time, the scraper 41, the brush roll 48, and the baffle 49 arranged on the outer peripheral cooling surface of the cooling roll 21 shown in FIG. 2 are simultaneously inserted from the atmosphere side. Then, the two positioning members 36 arranged in the horizontal direction at the front end of the cantilever 33 abut against the two stoppers 7 provided on the bottom surface of the roll chamber 20 to correspond to the tundish 15. The insertion depth of the cooling roll 21 is determined, and the parallelism of the axis of the cooling roll 21 with respect to the nozzle / slit 16 of the tundish 15 is determined. At the same time, the cover plate 35 integral with the movable carriage 31 closes the insertion opening 5 of the main body 3, so that the roll chamber 20 is hermetically sealed by bolting to the peripheral edge of the insertion opening 5 through a sealing material.
[0036]
On the other hand, in the melting chamber 10, as shown in FIG. 2, the melting furnace 11 is tilted around the tilting shaft 12 and discharged from the tundish 15 with the upper lid 19 that can preheat the tundish 15, and the tundish 15 Is filled with molten metal, and after the position of the nozzle / slit 16 of the tundish 15 with respect to the cooling roll 21 is finely adjusted, the melting chamber 10 and the roll chamber 20 have a predetermined differential pressure and rotate in the direction indicated by the arrow. The molten metal is cast from the nozzle / slit 16 to the outer peripheral cooling surface of the cooling roll 21. The molten metal is rapidly cooled and solidified to form a thin metal strip, but is peeled off from the cooling roll 21 by the scraper 41 disposed in contact with the cooling surface of the cooling roll 21 and flies forward. Further, the outer peripheral cooling surface of the cooling roll 21 is cleaned of wrinkles and small thin pieces by the subsequent brush roll 48, and is cleaned with a baffle 49 if necessary, and returns to the position immediately below the nozzle / slit 16.
[0037]
Thus, normally, the molten metal is replenished from the melting furnace 11 to the tundish 15, and when the molten metal in the melting furnace 11 is consumed, the roll chamber 20 is set to atmospheric pressure, the bolt of the cover plate 35 is removed, The cooling roll 21 on the cantilever 33 is drawn out from the insertion opening 5 of the main body side wall 3w by the moving carriage 31 to the outside. If necessary, a support column is interposed between the cantilever 33 of the movable carriage 31 and the floor so that the movable carriage 31 does not vibrate, and the cooling roll 21, the scraper 41, the brush roll 48, and the buffalo 49 maintenance and inspections are performed. Further, when the unevenness due to the damage of the outer peripheral cooling surface of the cooling roll 21 exceeds a predetermined standard, the outer peripheral cooling surface is fixed by the grinding tool while fixing the movable carriage 31 with the support column and rotating the cooling roll 21 as described above. The surface is ground to a certain depth to regenerate a smooth outer peripheral cooling surface. Since vibration is prevented at the time of grinding, the cutting edge of the grinding bite does not bite beyond a certain depth from the outer peripheral cooling surface of the cooling roll. At this time, the grinding tool can also be more precisely ground by preventing vibration.
[0038]
When the maintenance and inspection are completed, the scraper 41, the brush roll 48, and the baffle 49 are placed and set on the outer periphery of the cooling roll 21 as they are, and are inserted into the roll chamber 20 of the thin metal strip casting apparatus 1 by the movable carriage 31. Casting is resumed.
[0039]
As mentioned above, although the metal strip casting apparatus of this invention was demonstrated by the Example, of course, this invention is not limited to this, A various deformation | transformation is possible based on the technical idea of this invention.
[0040]
For example, in this embodiment, the cooling roll is moved in the axial direction by the moving carriage and inserted from the insertion opening provided in the side wall of the main body, but the cooling roll is moved in the direction perpendicular to the axial center. It is also possible to insert from the back side of the main body.
Further, in this embodiment, the case where the cantilever with the cooling roll installed is inserted into the roll chamber, but a rail that matches the external rail is provided on the bottom surface of the roll chamber, and the cooling roll for the mobile carriage is installed. You may make it insert a part into a roll with a wheel.
Further, in this example, the case of producing a metal ribbon was illustrated, but the metal ribbon of the present invention is also used when producing a metal flake or metal powder by pulverizing a discontinuous metal ribbon or a metal ribbon. Band casting equipment is applied.
[0041]
【The invention's effect】
The metal ribbon casting apparatus of the present invention is implemented in the form as described above, and has the following effects.
[0042]
According to the metal ribbon casting apparatus of claim 1, since the cooling roll can be pulled out from the main body of the metal ribbon casting apparatus by the moving carriage, maintenance, inspection and replacement work can be easily and quickly performed in a wide place. It is possible to reduce the casting play time and increase the casting amount in the metal ribbon casting apparatus, thereby improving the operating rate. In addition, since the lid plate for the insertion opening on the side wall of the metal ribbon casting apparatus is attached to the movable carriage, no special opening / closing mechanism is required, and when inserting the cooling roll by the movable carriage, the insertion opening is inserted through the sealing material. It is possible to easily seal the main body by bolting the cover plate to the peripheral edge portion.
[0043]
According to the metal ribbon casting apparatus of the second aspect, since the cooling roll installed on the cantilever of the movable carriage is inserted into the roll chamber together with the cantilever, only the roll chamber is evacuated from the atmospheric pressure at the start of casting. In addition to shortening the time required for exhaustion and reducing the required power, it is easy to control the differential pressure between the melting chamber and the roll chamber, and the molten metal from the tundish nozzle to the outer cooling surface of the cooling roll Therefore, the thickness of the metal ribbon is always kept constant.
[0044]
According to the metal ribbon casting apparatus of the third aspect, the cooling roll inserted into the roll chamber is rotated by the drive motor installed in the portion on the atmosphere side of the movable carriage, so that a special specification is required for the drive motor. In addition, the refrigerant of the cooling roll can be easily supplied and discharged from the rotating shaft on the atmosphere side.
According to the metal ribbon casting apparatus of claim 4, since the scraper and cleaning rolls arranged on the outer peripheral cooling surface of the cooling roll are inserted and pulled out simultaneously with the cooling roll into the roll chamber, the cooling roll, scraper and cleaning rolls are provided. Maintenance and inspection can be performed quickly and with very little man-hours.
[0045]
According to the metal ribbon casting apparatus of claim 5, when the cooling roll installed on the cantilever is inserted into the roll chamber, the two positionings provided side by side in the horizontal direction at the tip of the cantilever Since the member is positioned in contact with two stoppers provided correspondingly on the bottom surface of the roll chamber, the insertion position of the cooling roll with respect to the tundish and the axial center of the cooling roll with respect to the nozzle slot of the tundish Parallelism is accurately reproduced.
According to the metal strip casting apparatus of the sixth aspect, the cantilever and the floor surface of the movable carriage drawn out from the main body to the atmosphere side are fixed at the time of surface grinding of the outer peripheral cooling surface of the cooling roll. It is possible to avoid the trouble that the grinding tool bites into the depth more than planned without vibration.
[Brief description of the drawings]
FIG. 1 is a front view of a metal ribbon casting apparatus according to an embodiment.
FIG. 2 is a side view taken along line [2]-[2] in FIG.
FIG. 3 is a front view of a metal ribbon casting apparatus of Conventional Example 1.
4 is a cross-sectional view taken along line [4]-[4] in FIG.
FIG. 5 is a perspective view showing a prior art molten metal reservoir and a cooling roll for producing a metal ribbon.
[Explanation of symbols]
1 Metal ribbon casting equipment
3 Body
4 Bulkhead
5 Insertion opening
10 Dissolution chamber
11 Melting furnace
15 Tundish
16 Nozzle slit
20 roll room
21 Cooling roll
25 Rotating bearing
27 Drive motor
31 Mobile cart
33 Cantilever
35 Cover plate
37 Traveling motor
38 wheels
39 rails

Claims (6)

In a metal ribbon casting device that supplies a molten metal from a tundish nozzle to the outer cooling surface of a cooling roll that rotates at high speed in a vacuum or an inert gas atmosphere and forms a metal ribbon by rapid cooling.
The cooling roll is installed in the moving carriage, and on the other hand, an insertion opening for inserting the cooling roll on the moving carriage from the outside is formed on the side wall of the main body of the metal strip casting apparatus where the tundish is installed. And
The metal ribbon casting apparatus, wherein the insertion opening is sealed by a cover plate attached to the movable carriage when the cooling roll is inserted. The inside of the main body is defined by an upper melting chamber in which the tundish is accommodated via a partition wall and a lower roll chamber in which the cooling roll is accommodated, and is installed on the cantilever of the movable carriage. 2. The metal ribbon casting apparatus according to claim 1, wherein the cooling roll is inserted into the roll chamber by the moving carriage together with the cantilever. When the cooling roll is inserted into the roll chamber, a driving motor of the cooling roll is installed in a portion of the movable carriage that is on the atmosphere side outside the roll chamber, and the rotation shaft of the cooling roll is moved. 3. The metal ribbon casting apparatus according to claim 2, wherein the metal ribbon casting apparatus is supported by a rotary bearing that is fixed to a carriage and penetrates the lid plate and is airtightly rotated. Each drive source is installed in a portion on the atmosphere side of the movable carriage so that a scraper and cleaning rolls arranged on the outer peripheral cooling surface of the cooling roll are inserted into the roll chamber together with the cooling roll. The metal strip casting apparatus according to claim 2, wherein the drive shaft is fixed to the movable carriage and is pivotally supported by a drive bearing penetrating the lid plate to be airtightly driven. When the cooling roll is inserted into the main body, two stoppers provided in the main body corresponding to two positioning members arranged horizontally at the tip of the cantilever beam inserted into the main body The metal ribbon casting apparatus according to claim 2, wherein the cooling roll is positioned in contact with the metal ribbon. At the time of rotational grinding of the outer peripheral cooling surface of the cooling roll, the moving table includes a fixing means for fixing to the floor surface.
The apparatus for casting a metal ribbon according to claim 2.

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