WO2006013654A1 - Dispositif pour le laminage direct de metal en fusion - Google Patents

Dispositif pour le laminage direct de metal en fusion Download PDF

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Publication number
WO2006013654A1
WO2006013654A1 PCT/JP2005/004601 JP2005004601W WO2006013654A1 WO 2006013654 A1 WO2006013654 A1 WO 2006013654A1 JP 2005004601 W JP2005004601 W JP 2005004601W WO 2006013654 A1 WO2006013654 A1 WO 2006013654A1
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WO
WIPO (PCT)
Prior art keywords
molten metal
rolling
roll
groove
rolls
Prior art date
Application number
PCT/JP2005/004601
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English (en)
Japanese (ja)
Inventor
Yoshihiro Saito
Naoki Goto
Kenichi Horaguchi
Katsuhiro Nojima
Original Assignee
Central Motor Wheel Co., Ltd.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Central Motor Wheel Co., Ltd. filed Critical Central Motor Wheel Co., Ltd.
Priority to JP2006531255A priority Critical patent/JP4415018B2/ja
Publication of WO2006013654A1 publication Critical patent/WO2006013654A1/fr

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
    • B22D11/06—Continuous casting of metals, i.e. casting in indefinite lengths into moulds with travelling walls, e.g. with rolls, plates, belts, caterpillars
    • B22D11/0622—Continuous casting of metals, i.e. casting in indefinite lengths into moulds with travelling walls, e.g. with rolls, plates, belts, caterpillars formed by two casting wheels

Definitions

  • the present invention relates to a molten metal direct rolling apparatus for forming a metal sheet by subjecting molten metal to direct rolling.
  • the molten metal direct rolling method is a method of forming a desired metal plate by solidifying and rolling a molten metal injected between a pair of rolling rolls, and can not be obtained by the strip continuous method. It can form a metal plate with a hot-rolled structure.
  • Non-Patent Document 1 As such a molten metal direct rolling method, the inventors of the present invention, for example, as shown in Non-Patent Document 1 (see FIG. 8), pass through a pair of rolling rolls 61 and 62 through both rotation axes.
  • the plane f is arranged so as to incline approximately 45 degrees to the discharge side with respect to the vertical direction, and the injection difference is reduced in the area defined by the rolling rolls 61 and 62 and the side dams provided on both sides thereof.
  • an apparatus 60 is proposed for injecting a molten metal X (a molten metal of an aluminum alloy) to form a metal sheet Y ′ (aluminum alloy sheet).
  • the position where the solidified metal (solidified shell) solidified by the molten metal in contact with the rolling rolls 61, 62 is fed by the rolling rolls 61, 62 is located between the rolling rolls 61, 62.
  • a large clamping force (rolling load) is generated in the metal immediately after solidification, which can not be generated by the above strip continuous method. It can be rolled at high and low rolling reduction rates.
  • the rolling reduction is a reduction ratio of the distance between the rolling rolls 61 and 62 to the position where the solidification metal meets and solidification is completed (details will be described later).
  • this molten metal direct rolling mill 60 is equivalent to a hot-rolled thin plate in a single process of molten metal X by solidifying the molten metal X and performing rolling processing at a large reduction ratio equivalent to normal hot rolling. It is an apparatus which can shape
  • Non-Patent Document 1 Journal of Japan Society for Plastic Processing No. 36 ⁇ 418 issue pl281— pl287 Disclosure of the invention
  • the molten metal is dropped from the weir-like tundish onto the lower rolling roll, and is then defined by the upper and lower rolling rolls and the side dams. It is made to flow into the area to form a pool.
  • this conventional molten metal direct rolling mill since a small pool is formed on the rolling rolls, the surface level of the molten metal, which is difficult to control the level of the surface of the pool uniformly, tends to fluctuate. For this reason, the rolling load and the reduction rate are fluctuated according to the tendency that the solidification metal encounters and the completion position of the solidification fluctuates as described above.
  • the mechanical properties such as strength, ductility, etc. are not stable in the longitudinal direction of the metal sheet, and problems occur.
  • the molten metal direct rolling mill of the conventional configuration since the molten metal is supplied by being dropped into a pool on a rolling roll, the surface of the molten metal tends to be wavy. As a result, the molten metal is disturbed at the first contact point with the rolling roll (so-called contact start point), and a surface defect is easily generated on the formed metal sheet.
  • the molten metal is supplied between the rolling rolls using a bowl-shaped tundish, it is difficult to uniformly supply the molten metal in the roll width direction.
  • the temperature distribution of the molten metal tends to be uneven in the roll width direction.
  • the rolling reduction also becomes uneven in the roll width direction, and according to this, when forming a wide thin plate which tends to become uneven in thickness, structure 'mechanical property, etc. of the metal plate, the thin plate It is easy to cause shape defects such as flatness defects, and also causes problems.
  • the structure form is formed asymmetrically in the thickness direction. It was strong.
  • the reverse segregation occurs in which the solute is concentrated as it approaches the plate surface, and furthermore, the distribution of this solute is also asymmetric in the thickness direction. It had become.
  • the metal plate thus formed into the asymmetric structure exhibits a mechanical property which is biased in the thickness direction, which is undesirable for the mechanical property of the product!
  • the present invention solves a pressing problem and proposes a practicable molten metal direct rolling mill capable of stably forming a metal plate of excellent quality.
  • a pair of upper and lower water-coolings are disposed such that both rotation axes are horizontal and parallel to each other, and planes passing through both rotation axes are inclined to the vertical or discharge side within about 45 degrees.
  • a molten metal supply means for sequentially supplying molten metal held in the molten metal so as to maintain a substantially constant surface level in the supply path of the horizontal supply nozzle, and the horizontal supply nozzle force is supplied.
  • Molten metal power The upper and lower contact circumferential lengths from the upper and lower contact start ends in contact with the upper and lower rolling rolls to the narrowest narrowest rolling end between the upper and lower rolling rolls are approximately equal.
  • Molten metal characterized by soaking It is a direct rolling device. This molten metal direct rolling mill forms a hot-rolled sheet (metal sheet) from molten metal in a single step by performing rapid solidification of the molten metal and rolling processing corresponding to ordinary hot rolling on the solidified metal. It can be done.
  • the molten metal is quietly fed in a calm state by the horizontal supply nozzle and the molten metal supply means that can not form a pool on the rolling rolls as in the above-described conventional configuration. Are sequentially supplied between upper and lower rolling rolls.
  • the molten metal can be stably supplied at a substantially constant surface level, the upper and lower rolling rolls and the solidified metal (solidified shell) solidified by contacting with each other meet and the solidification is completed. Because it is always fixed and can be applied with a nearly constant rolling reduction and rolling load, It is possible to stably form a metal plate having a desired thickness and structure form.
  • the surface of the metal sheet does not have any surface defects due to the surface of the molten metal or the like.
  • this horizontal supply nozzle can be disposed at an arbitrary position on the supply side of the top end portion of the lower rolling roll, the contact where molten metal contacts the lower rolling roll The perimeter can be set arbitrarily.
  • the contact circumferential length at which the molten metal contacts the upper rolling roll can be arbitrarily adjusted by the surface level. Therefore, since the contact circumferential lengths of the upper and lower rolling rolls can be made equal arbitrarily, the structure morphology and mechanical properties may be asymmetrically formed in the thickness direction as in the above-described conventional configuration. It is possible to form a metal plate whose shape and mechanical properties are symmetrical in the thickness direction.
  • this horizontal supply nozzle is mounted so as to be arranged in a noncontact manner with a fine gap between it and the lower rolling roll, the horizontal supply nozzle is mounted by the lower rolling roll. Since the nozzles are not contact cooled !, the temperature drop of the molten metal in the feed path of the horizontal feed nozzle can be minimized.
  • the rolling roll and the first roll are Since the temperature of the molten metal at the contact start point in contact with the metal can be uniformly controlled in the roll width direction, the rolling reduction also becomes uniform in the roll width direction, and the thickness, structure, mechanical properties, etc. of the metal plate also follow the roll width direction. Can be uniform.
  • the rolling process is started according to the rotation of the rolling rolls 21 and 22.
  • the rolling rolls 21 and 22 slip with the solidified metal X to start rolling force.
  • the inclination angle ⁇ of the plane f passing through 1 2 is
  • the upper limit of the inclination angle ⁇ is obtained.
  • the coefficient of friction is generally about 0.4 when performing hot, non-lubricated rolling of an aluminum alloy, the upper limit value of the inclination angle ⁇ ⁇ ⁇ is about 45 degrees.
  • the lower limit value of the inclination angle ⁇ ⁇ ⁇ is determined by the condition that the molten metal X is not inserted into the gap between the tip 13 of the horizontal supply nozzle 12 and the lower rolling roll 22 to cause leakage of hot water.
  • the condition is that the depth of the molten metal h 1S at the tip 13 of the horizontal supply nozzle 12 is this gap and the surface tension of the molten metal
  • the inclination angle ⁇ may be 0 degree.
  • the arrangement form of the upper and lower rolling rolls 21, 22 is a plane passing through the rotation axis P, P of each rolling roll 21, 22.
  • the pair of upper and lower rolling rolls have a water cooling type cooling function so as to appropriately solidify the metal melt in contact.
  • a water cooling function of this water cooling system an internal water cooling system provided with a circulation passage for circulating cooling water inside the roll
  • an external water cooling type configuration in which the roll processed surface is directly cooled by cooling water from the outside of the roll can be used.
  • the rolling rolls can exhibit excellent heat removal capability and can rapidly solidify the molten metal.
  • the molten metal direct rolling mill of the present invention performs rolling processing at a large rolling reduction equivalent to normal hot rolling, a large rolling load acts on the rolling mill. Therefore, rolling rolls must have high cooling capacity and sufficient strength. For this reason, as a rolling roll, it is possible to suitably use a sleeve type water cooling roll force of an internal water cooling type optimally designed using an alloy tool steel having both strength and thermal conductivity.
  • a metal plate of excellent quality which has no surface defects and has a structure morphology and mechanical properties symmetrically in the thickness direction is stably obtained.
  • it can be molded, it can be sufficiently used as a practical manufacturing apparatus.
  • a configuration that enables rolling is proposed.
  • a metal solidified by upper and lower rolling rolls is rolled by the same roll at a reduction ratio of about 40% or more to form a dendrite formed during solidification which is elongated in the longitudinal direction.
  • internal defects such as microvoids and cracks that may be generated during solidification or immediately after rolling and surface defects such as ripple marks are repaired by pressure bonding or smoothing to obtain excellent quality metal plates. It can be molded.
  • the rolling reduction is defined as (the narrowest distance between one roll t Z total thickness solidification start thickness t) x 100%. Also, the narrowest distance t between the rolls is as shown in FIG.
  • the full thickness solidification start thickness t is the thickness where the molten metal X completes solidification and rolling starts
  • a concave groove formed circumferentially on the surface of the lower rolling roll, and a fitting convex circumferentially formed on the surface of the upper rolling roll and capable of being fitted into the concave circumferential groove The molten metal supplied between the upper and lower rolling rolls by the horizontal supply nozzle is rolled and solidified by the groove bottom surface of the recessed peripheral groove and the convex top surface of the fitted convex peripheral portion.
  • the solidified rolling metal is obtained by this high rolling reduction. It tries to spread and deform between rolls.
  • the bottom surface of the groove of the lower rolling roll and the convex top surface of the fitting convex peripheral portion of the upper rolling roll solidify the molten metal supplied by the horizontal supply nozzle, And it is a roll processing surface which carries out rolling processing.
  • the concave circumferential groove formed on the surface of the lower rolling roll is provided with groove side walls on both sides inclined outward at about 3 degrees or more and about 10 degrees or less.
  • the groove side wall of the concave circumferential groove circumferentially formed on the surface of the lower rolling roll is removed. It should be provided with an appropriate inclination angle (so-called "falling slope"). This is a well-known technology in a processing apparatus for hot-rolling a metal square between a recessed groove and an insertion projection.
  • the groove side wall is formed to have a falling slope of about 3 degrees, a high surface pressure is generated between the groove side wall and the metal plate, and therefore the metal plate is partially baked and the metal plate is wound on the lower rolling roll. It also tends to stick.
  • the gap between the groove side wall and the convex peripheral wall becomes large, so the surface pressure between the groove side wall and the metal plate is reduced and the metal plate easily loses the lower rolling roll force. Since the thick and large burrs are formed along the upper rolling roll during the rolling force S, there is also a tendency for the upper rolling roll to be easily wound.
  • a lubricant release agent is applied to the groove side walls formed on both sides of the concave circumferential groove of the lower rolling roll and the convex circumferential wall formed on both sides of the fitting convex circumferential portion of the upper rolling roll.
  • a configuration provided with a release agent coating device is proposed. In such a configuration, when the molten metal direct rolling device is forming a metal plate, an appropriate amount of the lubricant release agent is applied to the groove sidewall and the convex peripheral wall by the lubricant release agent applying device. It is intended to maintain the state of roaring. Thereby, even if the metal plate is continuously formed, the metal plate can be prevented from being seized on the groove side wall and the convex peripheral wall by the lubricant release agent.
  • the lubricant release agent applying apparatus is controlled to always apply a predetermined amount of lubricant release agent, or is regularly controlled to apply a lubricant release agent at predetermined intervals. It can be
  • molten metal direct rolling mill on the surface of a rolled metal that solidifies and rolls the molten metal supplied from the pair of upper and lower water-cooled rolling roll force horizontal supply nozzles.
  • a configuration is proposed in which many small depressions of 5 m or more and about 5.0 m or less are formed.
  • Ra of about 0.5 ⁇ m or more and about 5.0 ⁇ m or less means that the average depth of the depressions is in the range of about 0. or more and 5.0 m or less.
  • the molten metal direct rolling method Since the metal immediately after solidification is rolled at a large rolling reduction, the mold release agent is likely to peel off, and the molten metal is seized at the peeled portion, so that the mold release agent application is for continuous forming of the metal plate. Not suitable.
  • the molten metal direct rolling mill in which a large clamping force acts, the molten metal can be prevented from being baked on the processed surface of the roll without applying the mold release agent.
  • this rolled surface can roll-roll the metal immediately after solidification without causing slip even at a large rolling reduction because the coefficient of friction is sufficiently high. Therefore, in the case where the desired metal sheet is continuously formed by the molten metal direct rolling apparatus of the present invention, this configuration can further enhance the formation stability of the metal sheet and can exhibit high practicability. .
  • the depression on the rolled surface is smaller than RaO. 5 ⁇ m, the coefficient of friction becomes small, and thus slippage tends to occur.
  • it is larger than Ra5.0 m In such a case, the function of preventing the seizing of the molten metal decreases, and the surface of the formed metal plate becomes rough and the gloss also becomes dull.
  • a pair of upper and lower water-cooled rolling rolls solidifies and melts the molten metal supplied from the horizontal supply nozzle, and the rolled surface is substantially uniform.
  • a configuration formed by shot-pei-ung-cha using spherical shot particles is proposed.
  • the rolled surface having a strong structure is formed by forming a large number of substantially uniform curved minute depressions, and when viewed microscopically, the depressions may be smoothly continuous.
  • This roll car surface is further excellent in the effect of preventing the above-mentioned seizing of the molten metal.
  • shot pey ung ka is sprayed by injecting shot grains at a relatively high speed, the surface temperature of the coated surface will rise during this processing.
  • the durability of the roll car surface can be further improved.
  • the effect of the rolled surface is sustained for a long time, so that the practicability of the molten metal direct rolling mill of the present invention is further enhanced.
  • the above-described molten metal supply means is connected to the horizontal supply nozzle, and communicates with the tundish which holds the molten metal at the same level as the horizontal supply path of the horizontal supply nozzle, and the tundish. And a holding furnace for holding the molten metal at a predetermined temperature, and a connecting passage between the holding furnace and the tundish, so as to keep the surface level of the molten metal in the tundish substantially constant.
  • a configuration is proposed that includes a control valve that controls the inflow of molten metal.
  • the tundish is an intermediate holding furnace for temporarily transferring the molten metal from the holding furnace and supplying it to the horizontal supply nozzle.
  • the molten metal is allowed to flow through the holding furnace power tundish to the horizontal supply nozzle so that the molten metal can be quietly supplied along the horizontal direction between the upper and lower rolling rolls, and
  • the control valve controls the amount of inflow of molten metal to the tundish in the holding furnace so that the surface level of the molten metal between the supply path of the horizontal supply nozzle and the inside of the tundish can be kept approximately constant. is there.
  • the above-described horizontal supply nozzle is provided with a side dam on both sides of the horizontal supply passage for supplying molten metal, which prevents the molten metal flowing through the horizontal supply passage from protruding in both directions.
  • the side dam prevents the molten metal flowing in the horizontal supply path of the horizontal supply nozzle from protruding in both directions, and the molten metal supplied between the upper and lower rolling rolls may also protrude in both directions. We are trying to prevent it. Therefore, since almost all of the molten metal supplied from the horizontal supply nozzle is formed as a metal plate, the production efficiency of the material can be extremely high.
  • both rotation axes are horizontal and parallel to each other, and planes passing through both rotation axes are disposed so as to be inclined within about 45 degrees to the vertical or discharge side.
  • the upper and lower contact perimeters from the upper and lower contact start ends where the molten metal supplied from the upper and lower rolls contacts the upper and lower rolling rolls and the narrowest and narrowest rolling end of the distance between the upper and lower rolls are almost equal.
  • Molten metal straightened to the length It is a contact rolling device. According to this molten metal direct rolling mill, it is possible to stably form a metal plate of excellent quality having no structural defects and having symmetrical structure and mechanical properties in the thickness direction. Thus, the molten metal direct rolling mill of the present invention can be sufficiently used as a practical manufacturing machine.
  • the working effect of the present invention described above is suitably applied as a molten metal direct rolling device that can perform rolling processing that applies a large clamping pressure corresponding to normal hot rolling. It can be positively and surely exhibited, and has high practicality.
  • a concave circumferential groove circumferentially formed on the surface of the lower rolling roll, and a fitting convex circumferential portion circumferentially formed on the surface of the upper rolling roll and capable of being fitted into the concave circumferential groove are provided.
  • a metal plate of a fixed width can be continuously formed, and the formation stability of the metal plate can be further improved.
  • the groove side wall circumferentially formed on the surface of the lower rolling roll is provided with groove side walls inclined outward by about 3 degrees or more and about 10 degrees or less.
  • rolling is performed
  • the processed metal sheet can be discharged straight without being wound on a rolling roll, and the metal sheet can be stably and continuously formed.
  • a lubricant release agent is applied to the groove side walls formed on both sides of the concave circumferential groove of the lower rolling roll and the convex circumferential wall formed on both sides of the fitting convex circumferential portion of the upper rolling roll.
  • the groove side wall and the convex peripheral wall can be maintained in a state in which the lubricating mold release agent is appropriately applied, and the molten metal is formed on the groove side wall or convex peripheral portion. You can prevent burning. Thus, the molten metal direct rolling mill can be more practical.
  • the molten metal direct rolling mill described above Ra about 0. 6 on the roll processed surface that solidifies and rolls the molten metal supplied from the upper and lower water-cooled rolling force flat supply nozzles.
  • the molten metal direct rolling mill according to the present invention can further enhance the forming stability of the metal sheet and exhibit high practicability, in the case where the desired metal sheet is continuously formed.
  • the pair of upper and lower water-cooled rolling rolls solidifies and melts the molten metal supplied from the horizontal supply nozzle, and the rolled surface is substantially uniform.
  • the rolled surface has a further excellent effect of preventing seizing of the above-described molten metal. Become.
  • the durability of the roll cover surface can be further improved, the above-described effect of the roll processed surface is long. It can last for a period of time, further enhancing the practicability of the molten metal direct rolling mill of the present invention.
  • the above-described molten metal supply means is connected to the horizontal supply nozzle, and communicates with the tundish which holds the molten metal at the same level as the horizontal supply passage of the horizontal supply nozzle, and the tundish. And a holding furnace for holding the molten metal at a predetermined temperature, and a connecting passage between the holding furnace and the tundish, so as to keep the surface level of the molten metal in the tundish substantially constant.
  • a constant amount of molten metal can be sequentially supplied between the rolling rolls while maintaining a predetermined temperature, and the above-mentioned excellent-quality metal The plate can be formed easily and properly.
  • the above-described horizontal supply nozzle has a side dam provided on both sides of the supply path for supplying the molten metal, which prevents the molten metal flowing in the supply path from protruding in both directions.
  • a side dam provided on both sides of the supply path for supplying the molten metal, which prevents the molten metal flowing in the supply path from protruding in both directions.
  • almost all of the molten metal supplied from the horizontal supply nozzle can be formed as a metal plate, and the production efficiency of the material can be extremely high.
  • FIG. 1 is a longitudinal side view showing a molten metal direct rolling mill 1 according to an embodiment of the present invention.
  • FIG. 2 It is an enlarged view showing the arrangement of the horizontal supply nozzle 12.
  • FIG. 3 A cross-sectional view of the horizontal supply nozzle 12 between M and M 'shown in FIG.
  • FIG. 4 It is a schematic diagram showing the arrangement
  • Fig. 5 is an explanatory view showing a fitting convex peripheral portion 24 of the upper rolling roll 21 and a recessed circumferential groove 25 of the lower rolling roll 22.
  • FIG. 6 is a table showing the results of evaluating the bakeability of the molten metal X and the surface morphology of the metal plate Y with respect to the depth of the depression 28 forming the convex top surface 26 and the groove bottom 27.
  • FIG. 7 is a table showing the evaluation results of the groove inclination angles of the groove side walls 29, 29 of the concave groove 25 and the bakeability of the molten metal X and the burr formation state of the metal plate Y.
  • FIG. 8 An explanatory view showing an apparatus 60 of a conventional configuration in which the upper and lower rolling rolls 61, 62 are inclined at about 45 degrees.
  • the molten metal direct rolling mill 1 of this embodiment is shown in FIG.
  • the molten metal direct rolling mill 1 is provided with a holding furnace 2 for holding the molten metal X at a predetermined temperature, and a heater 3 for holding the molten metal X stored at the predetermined temperature is disposed in the holding furnace 2. It is done. Also this Along the holding furnace 2, a tundish 4 is provided.
  • the holding furnace 2 is provided with a protruding upper portion 6 protruding toward the tundish 4 side, and the tundish 4 is provided with a protruding lower portion 7 protruding toward the holding furnace 2 side.
  • the lower part 7 of the Tundish 4 is disposed below the upper part 6 of the holding furnace 2, and between the lower bottom of the upper part 6 and the upper surface of the lower part 7 is a holding furnace 2 and a tundish.
  • a communication passage 5 is provided to communicate with 4. Further, the communication passage 5 is provided with a control valve 8 for converting the communication passage 5 into an open state and a closed state, and the open / close operation of the control valve 8 is controlled by a control device not shown.
  • the control valve 8 can adjust the opening amount of the communication passage 5 in accordance with the instruction of the control device. For example, it is possible to control the amount of the molten metal X sent from the holding furnace 2 to the tandem heater 4 by setting the opening amount to 1Z4 opening or 1Z2 opening.
  • the controller for controlling the opening and closing of the control valve 8 is provided in the tundish 4 by the float 10 floating according to the surface of the molten metal X held in the tundish 4. The height of the surface of X is detected. And, by opening and closing the control valve 8 in accordance with the surface level, the surface level is controlled so as to be almost constant at all times. Also in the tundish 4, a heater 3 for keeping the molten metal X stagnating at a predetermined temperature is disposed.
  • the molten metal X is appropriately added to the holding furnace 2, and the surface level of the molten metal X stored in the holding furnace 2.
  • the control valve 8 is opened, the molten metal X in the holding furnace 2 also flows into the tundish 4 through the communication passage 5.
  • the control valve 8 is also disposed at a position higher than the surface level of the molten metal X held in the tundish 4.
  • the communication passage 5 is also filled with the molten metal X. Therefore, the control valve 8 is opened and held.
  • the molten metal supply control means is constituted by the holding furnace 2, the tundish 4, the communication passage 5, the control valve 8, the control device and the like.
  • the above-described tundish 4 has a supply port 9 on the side opposite to the holding furnace 2.
  • a horizontal supply nozzle 12 is provided which supplies the molten metal X in the tundish 4 along the horizontal direction.
  • a rolling mill 20 provided with a pair of upper and lower rolling rolls 21, 22 provided in parallel in the vertical direction along the horizontal direction orthogonal to the horizontal supply nozzle 12. It is done.
  • the rolling device 20 is inclined in the range of about 45 degrees or less from the vertical direction to the opposite side (discharge side) of the tandem shaft 4 from the plane passing through the rotational axes of the upper and lower rolling rolls 21 and 22.
  • the lower rolling rolls 21 and 22 can be tilted.
  • the angle formed by the plane f with respect to the vertical direction is the angle of inclination of the pair of upper and lower rolling rolls 21 and 22.
  • the angle of inclination is about 45 from the vertical direction (0 degree).
  • the range to the degree is shown (see Figure 4).
  • a control device (not shown) for controlling rotation of the upper and lower rolling rolls 21 and 22 is disposed in the rolling device 20, and the upper rolling roll 21 and the lower rolling roll 22 are reversely directed to each other. Control is made to rotate at the same rotational speed.
  • the discharge side direction in which the upper molten roll 21 and the lower roll 22 are rolled and the molten metal X supplied from the horizontal supply nozzle 12 is rolled and formed into the metal plate Y Involvement rotate each other. That is, on the sheet surface of FIGS. 1 and 2, the upper rolling roll 21 is rotated counterclockwise, and the lower rolling roll 22 is rotated clockwise. Further, in the rolling mill 20, the upper rolling roll 21 can be moved parallel to the lower rolling roll 22 in the vertical direction along the surface f, and pressed downward along the surface f. A movable roll 23 is also provided.
  • a concave circumferential groove 25 is circumferentially formed on the surface of the lower rolling roll 22, and a fitting convex circumferential portion 24 which can be fitted into the concave circumferential groove 25 is circumferentially formed on the upper rolling roll 21.
  • the outer peripheral diameter of the groove bottom surface 27 of the recessed peripheral groove 25 and the outer peripheral diameter of the convex top surface 26 of the fitting convex peripheral portion 24 are substantially the same diameter.
  • the pair of upper and lower rolling rolls 21 and 22 are formed on the surface f passing through the two rotation axes P and P described above, and the concave circumferential groove 25 of the lower rolling roll 22;
  • the fitting convex circumferential portion 24 is fitted in the recessed circumferential groove 25 so that the distance between the upper rolling roll 21 and the fitting convex circumferential portion 24 is the narrowest (see FIG. 4).
  • the concave circumferential groove 25 and the fitting convex circumferential portion 24 are sequentially rotated and changed circumferentially along the circumferential position 1S at which they are fitted. .
  • the distance between both By appropriately adjusting the narrowest distance t between the narrowest rolls, the thickness of the metal sheet Y formed by the molten metal direct rolling mill 1 can be set.
  • the convex top surface 26 of the fitting convex peripheral portion 24 of the upper rolling roll 21 and the groove bottom surface 27 of the concave peripheral groove 25 of the lower rolling roll 22 are each circumferentially
  • a large number of minute depressions 28 are formed substantially uniformly over the entire area.
  • the convex top surface 26 and the groove bottom surface 27 are the roll cover surfaces that are suitable for the present invention.
  • the depressions 28 are formed so that the depth thereof is in the range of Ra about 0.5 m or more and 5.0 m or less, and the depressions 28 adjacent to each other are smooth in a micro view. It has a continuous shape.
  • the convex top surface 26 and the groove bottom surface 27 do not get seized even when the molten metal X contacts, even if the mold release agent is not applied, and the solidified metal melt (hereinafter, solidified metal) It is possible to send X in the discharge side direction without slipping and to start rolling calories.
  • the metal sheet Y can be shaped as having a reasonably smooth and shiny surface. The convex surface 26 and the groove bottom 27 having a shape in which a large number of depressions 28 are formed will be described in detail later.
  • the concave circumferential groove 25 of the lower rolling roll 22 is provided with outwardly sloping groove side walls 29, 29 on both sides.
  • the groove inclination angle (draft inclination) ⁇ of the groove side walls 29, 29 is formed to be in the range of about 3 degrees or more and about 10 degrees or less.
  • burrs are formed along the groove inclination angle ⁇ in the gap between the groove side walls 29, 29 and the convex peripheral wall 30, 30 of the inset convex peripheral portion 24, which spreads in the roll width direction. It can be suppressed by doing this. As a result, the force acting directly on the groove sidewalls 29, 29 can be reduced, so that the lubricant release agent applied to the groove sidewalls 29, 29 can be prevented from being damaged. Can be prevented from sticking to the groove side walls 29, 29. Furthermore, by means of the groove side walls 29, 29 of the recessed circumferential groove 25, the rolled metal sheet can be discharged straight without being wound around the rolling rolls 21, 22, and the metal sheet can be continuously formed. .
  • convex peripheral walls 30, 30 formed on both sides of the fitting convex peripheral portion 24 of the upper rolling roll 21 and the lower rolling.
  • a lubricant release agent application device 31 for applying a paste-like lubricant release agent is provided on the groove side walls 29 and 29 of the concave circumferential groove 25 of the roll 22.
  • the lubricant release agent applying apparatus 31 includes a release agent supply source for holding a lubricant release agent (not shown), and a supply pipe 32 for supplying a predetermined lubricant release agent from the release agent supply source.
  • An application section 33 connected to the most downstream end of the supply pipe 32 for applying the lubricating release agent supplied from the supply pipe 32 to the convex peripheral walls 30, 30 and the groove side walls 29, 29, and the release agent supply source It comprises a controller (not shown) for controlling the amount of release agent supplied.
  • the application portion 33 is supported and fixed by the application case 34 so that the lubricant release agent can be stably applied to the convex peripheral walls 30, 30 and the groove side walls 29, 29. It is connected to the supply pipe 32 in 34.
  • the coating portion 33 has convex circumferential walls on the outlet side of the metal plate Y (the inclined side of the upper and lower rolling rolls 21 and 22) formed by the upper rolling roll 21 and the lower rolling roll 22.
  • groove sidewalls 29 and 29 are respectively disposed at four adjacent locations so as to be in contact with each other.
  • the application portion 33 is in the form of a brush, and the lubricant release agent can be applied almost uniformly and smoothly to the convex peripheral walls 30, 30 and the groove side walls 29, 29.
  • the amount of supply from the release agent supply source is set by the above-described control device so that the convex peripheral wall 30, 30 and the groove side walls 29, 29 are always coated with a substantially constant amount of the lubricant release agent. It controls appropriately. As a result, the mold release effect by the lubricating mold release agent is always properly exhibited, and the solidified metal X is prevented from burning on the convex peripheral walls 30, 30 and the groove side walls 29, 29.
  • the tundish 4 is formed on the side opposite to the holding furnace 2.
  • a horizontal feed passage 11 through which the molten metal X flows from the tundish 4 is formed in the horizontal direction on the horizontal feed nozzle 12 connected to the inlet 9.
  • the horizontal supply path 11 is composed of a road bottom portion 15 extending in the horizontal direction and side dams 16 and 16 standing up on both sides of the road bottom portion 15.
  • the horizontal supply nozzle 12 is disposed to be orthogonal to the pair of upper and lower rolling rolls 21 and 22 described above.
  • the tip 13 of the bottom 15 of the horizontal feed nozzle 12 is the side opposite to the inclination direction of the plane f passing through the rotational axes P, P of the upper and lower rolling rolls 21, 22, Of the lower roll 22
  • the tip 13 of the horizontal supply nozzle 12 is disposed closer to the supply side than the topmost portion (upper circumferential position in the vertical radial direction) of the lower rolling roll 22.
  • the lower rolling roll 22 does not interfere with the rotation of the lower rolling roll 22 and the lower rolling roll 22. Prevents the horizontal supply passage 11 from being cooled.
  • the horizontal feed nozzle 12 can be disposed at any position on the supply side of the tip end 13 of the lower rolling roll 22 from the topmost part of the lower rolling roll 22, the molten metal X is firstly transferred to the lower rolling roll 22 according to this position.
  • the contact circumferential lengths L and L (see FIG. 4) of the solidified metal X in contact with the upper and lower rolling rolls 21 and 22 respectively with the rolling rolls can be set to any equal lengths.
  • a heat insulating material (not shown) is provided on the inner peripheral surfaces of the bottom 15 of the horizontal supply passage 11 and the side dams 16 and 16 so that the molten metal X flowing through the horizontal supply passage 11 does not solidify. It is done. Further, the side dams 16 of the horizontal supply nozzle 12 do not fit into the recessed circumferential grooves 25, and the tip side portions 17 of the side dams 16 follow the arc shape of the surface of the upper and lower rolling rolls 21 and 22. It is provided to project to a position immediately before the position where the narrowest distance t is obtained. The distal end side portion 17 of the side dam 16 prevents the molten metal supplied to the recessed circumferential groove 25 from protruding to the side.
  • the horizontal feed path 11 of the horizontal feed nozzle 12 is formed to have substantially the same width as the width of the concave groove 25 of the lower rolling roll 22, and the horizontal feed path
  • the molten metal X is supplied almost uniformly to the entire groove width of the recessed circumferential groove 25 from 11.
  • the metal plate Y can be stably formed to have a substantially uniform thickness and structure, etc. in the sheet width direction, and can be formed to be substantially straight with high flatness. .
  • the molten metal X has a predetermined level of molten metal surface height, In this way, it is supplied quietly and gradually between the inset convex peripheral portion 24 of the upper rolling roll 21 and the concave peripheral groove 25 of the lower rolling roll 22.
  • the contact start end B (see FIG. 4) which is in first contact with the upper rolling roll 21 is almost the same at all times.
  • the solidified metal X can be rolled at an almost constant rolling reduction. Therefore, the metal plate Y can be stably formed into a desired plate thickness, structure, and the like. In addition, since the molten metal X is supplied quietly while always maintaining a calm state, bubbles and the like are not generated in the molten metal X, and disturbance such as the surface of the molten metal is generated. Nor. Therefore, the metal plate Y can be shaped without causing internal defects or surface defects like streaks.
  • a weir 19 is disposed on the upper side of the horizontal supply passage 11 in the horizontal supply nozzle 12.
  • the weir 19 is formed to have substantially the same width as the width of the horizontal supply passage 11 and is provided so as to be fitted into the horizontal supply passage 11.
  • the horizontal supply passage 11 communicates with the lower side of the weir 19, ie, the lower side of the horizontal supply passage 11, so that the molten metal X is supplied between the upper and lower rolling rolls 21 and 22 through the lower side. ing.
  • the upper rolling roll 21 and the lower rolling roll 22 are planes passing through the rotation axes P and P of the both.
  • the narrowest distance between the narrowest rolling end A and the narrowest distance A with A is the narrowest distance t between rolls.
  • the angle forming the contact circumferential length L is the molten metal contact angle ⁇ .
  • the arc length is a contact circumferential length L
  • the contact circumferential length L is a contact circumferential length L of the lower roll 22 and
  • the molten metal depth h is set.
  • the molten metal X supplied from the horizontal supply nozzle 12 has a lower pressure.
  • the contact start end B of the extending roll 22 and the contact start end B of the upper roll 21 are brought into contact with each other and condensed.
  • a distance of one circumferential length L is sequentially sent to be subjected to a rolling process.
  • the coefficient of friction is approximately 0.2 to 0.4. From these conditions (see equation (3) above), the upper limit value of the inclination angle ⁇ of the upper and lower rolling rolls 21 and 22 is approximately 45 with respect to the vertical direction. The degree was set.
  • the tip 13 of the horizontal supply nozzle 12 is disposed in a noncontact manner with the lower rolling roll 22 and having a fine gap, the molten metal X is inserted into this gap and leaked. It is a condition that does not occur. This condition is the above-mentioned melt depth h force This gap and the surface of the melt
  • the distance h between the contact start end B and the contact start end B so as not to exceed a critical value determined by tension or the like.
  • upper and lower rolling rolls 2 are provided.
  • the inclination angle 1, of 1, 22 ranges from the vertical direction to the discharge side to about 45 degrees.
  • the molten metal X supplied from the horizontal supply nozzle 12 arranged in this manner has a contact start end B in contact with the upper rolling roll 21 and a contact start end B in contact with the lower rolling roll 22.
  • Coagulation is started at 1 2. Then, when the upper and lower rolling rolls 21 and 22 are sequentially fed toward the narrowest rolling ends A and A by the rotation of the upper and lower rolling rolls 21 and 22, between the upper rolling roll 21 and the lower rolling roll 22
  • the gap gradually narrows, and solidified metal X meets on both the upper and lower sides to complete solidification. That is, it solidifies in the whole region in the plate thickness direction. Then, the solidified metal X is further fed in the plate direction in the entire plate thickness direction, so that the sheet is rolled.
  • the molten metal X can be vertically
  • the solidified metal X can be rolled equally from the vertical direction along the thickness direction.
  • the metal plate Y having a symmetrical structure can be formed in the thickness direction.
  • this reduction ratio can be set to about 40% or more, and the molten metal X is rapidly solidified, and a large clamping pressure corresponding to general hot rolling is achieved.
  • the molten metal X by rolling with (rolling load) The force can also form the metal plate Y in one step.
  • the dendrites generated during solidification are transformed into a longitudinally stretched processed structure by setting the high reduction ratio to about 40% or more, and microvoids that may be generated during solidification or immediately after the start of rolling Internal defects such as cracks and surface defects such as ripple marks can be repaired by pressure bonding or smoothing to form a metal plate of excellent quality.
  • the reduction ratio is set to about 50% or more, so that the effect by the rolling process can be further enhanced. As described above, this rolling reduction ratio corresponds to the narrowest roll distance t and the full thickness solidification start thickness t.
  • the thickness of the metal plate Y It is decided by the thickness of the metal plate Y, and it can be set as needed by appropriately setting the thickness design of the metal plate Y, the roll diameter and inclination angle of the upper and lower rolling rolls 21 and 22, the contact circumferential length L and L, etc.
  • the surface level of the molten metal X flowing in the horizontal supply passage 11 of the horizontal supply nozzle 12 is the same as that of the molten metal X at the contact start end B at which the tip 13 of the horizontal supply nozzle 12 is disposed.
  • the inside of the tundish 4 is maintained at the same hot water level.
  • the control valve 8 controls the control valve 8 to open / close the molten metal X from the holding furnace 2 to the tundish 4 to open / close the molten metal X from the holding furnace 2 to the tundish 4
  • the molten metal X in the tundish 4 is treated as the molten metal Always maintain it.
  • a constant amount of molten metal X can be supplied quietly between the vertical rolling rolls 21 and 22 while keeping the molten metal X in a steady state.
  • the rolling load applied at the time of rolling is set to a size that can be practically used sufficiently.
  • the rolling load also becomes relatively large as the outside diameter is increased.
  • the entire device will grow and there will be a lot of negative effects on installation in the factory.
  • the contact circumferential lengths L and L of the molten metal X become shorter as the outside diameter becomes smaller.
  • the outer diameter of the upper and lower rolling rolls 21 and 22 is determined within a range where it can be practically used, and the outer diameter which is generally used for rolling of molten metal and doing. Then, according to the upper and lower rolling rolls 21 and 22 of this size, the inclination angle ⁇ , the molten metal contact angle ⁇ , etc. are set as described above, and the molten metal X is supplied by the horizontal supply nozzle 12 and the molten metal By making the contact circumferential lengths L and L of X and the respective rolling rolls 21 and 22 equal
  • the molten metal direct rolling apparatus 1 according to the present invention is thus constructed.
  • the depression 28 prevents the occurrence of seizing to the upper and lower rolling rolls 21 and 22 and allows the molten metal X to be appropriately trapped without slipping.
  • the metal plate Y is provided to have a moderately smooth and shiny plate surface.
  • the depressions 28 have a depth of about Ra about 0.5-5. O / zm, and the depressions adjacent to each other are formed so as to be smoothly continuous with each other in a micro view. There is.
  • the convex top surface 26 and the groove bottom surface 27 are formed by shot peening in the present embodiment.
  • This shot-peeling shot is carried out using substantially uniform spherical shot particles having hardness equal to or higher than the material of the inset convex circumferential portion 24 and the concave circumferential groove 25 of the upper and lower rolling rolls 21 and 22.
  • this shot grain has a diameter of about 50-150 ⁇ m, and the shot grain is circumferentially extended on the convex top surface 26 and the groove bottom surface 27 by a jet velocity of about 150-300 mm Zsec. It injects almost uniformly.
  • minute depressions 28 with a depth of about Ra 0.5-5. 0 m are formed such that adjacent ones are smoothly continued.
  • the surface temperature of these particles is raised to the A3 transformation point.
  • the surface temperature reaches the A3 transformation point, a hardening action can be performed, and thus the durability of the convex top surface 26 and the groove circumferential surface 27 can be improved.
  • the convex top surface 26 and the groove circumferential surface 27 are formed in a surface shape in which a large number of minute depressions 28 are formed.
  • the depth range of the depressions 28 is prepared by preparing upper and lower rolling rolls in which the depressions 28 having different depths are formed on the convex top surface 26 and the groove bottom 27, respectively.
  • the molten metal direct rolling mentioned above Using apparatus 1, the inclination angle ⁇ of the upper and lower rolling rolls was about 25 degrees, and the rolling reduction was about 50%, and the formability in the case of forming the metal sheet Y was examined.
  • the results are shown in Figure 6.
  • the convex top surface and the groove bottom surface (roll processing surface) of each of the upper and lower rolling rolls are formed by the above-described shot-peel cutting.
  • the Ra is about 0.5-5. 0 m
  • the maximum depth Rmax exceeds about 15 m
  • the image may be locally seized or formed.
  • a dull spot occurs locally on the surface of the metal plate Y. Therefore, it is also necessary to set Rmax to about m or less.
  • the minimum depth Rmin is smaller than about 0.2 m, the solidified metal X can not be drawn over the entire contact circumference L, L, so
  • the recess 28 is formed to satisfy Rmax and Rmin.
  • the same experiment was conducted also in the case where the inclination angles ⁇ of the upper and lower rolling rolls were appropriately set within a range of about 45 ° from the vertical direction to the discharge side.
  • the depth of the depression 28 is preferably about Ra about 0.5-5. O / zm.
  • the molten metal direct rolling mill which is advantageous to the present invention 1 Therefore, even if the rolling reduction is large (about 50%), seizing of the molten metal X can be prevented, and the solidified metal X can be sequentially fed appropriately in the sheet processing direction, so the metal plate Y of excellent quality can be obtained. It can be stably and continuously molded.
  • a lubricant release agent is applied to the side peripheral walls 29, 29 by the lubricant release agent applying device 31 to prevent the molten metal X from being seized.
  • the groove inclination angle of about 3 degrees or more and about 10 degrees or less outward with respect to the direction orthogonal to the groove bottom surface 27 of the concave groove 25. It is provided to incline at ⁇ .
  • the groove The force acting on the side walls 29, 29 can be reduced, and furthermore, the friction between the solidified metal X and the groove side walls 29, 29 caused by this force can be suppressed.
  • the lubricant release agent applied to the groove side walls 29, 29 can be prevented from being damaged by the wide force S deformation force, so that the anti-seizure action by the release agent is appropriately made. It is possible to prevent the solidified metal X from burning to the groove side walls 29, 29.
  • the formed metal sheet can be discharged straight without being wound on the rolling rolls, and can be continuously formed with a constant width.
  • the groove inclination angle ⁇ of the groove side walls 29, 29 can appropriately exert the above-described effects.
  • the groove inclination angle ⁇ was approximately perpendicular to the groove bottom 27.
  • the temperature was gradually changed from 0 ° to form the metal plate Y, and the occurrence of baking of the solidified metal X and the solder formed on both side ends of the metal plate were examined.
  • the molten metal direct rolling mill 1 described above was used, the inclination angle ⁇ of the upper and lower rolling rolls was about 25 degrees, and the rolling reduction was about 50%.
  • a graphite grease type lubricant release agent is applied to the groove side wall and the convex peripheral wall of the fitting convex peripheral portion.
  • the convex top surface 26 of the inset convex peripheral portion 24 and the groove bottom surface 27 of the concave peripheral groove 25 are substantially uniformly spaced along the circumferential direction, as described above.
  • the shape is a large number of
  • the Rmax of the depression 28 was about 7.0 m, and the Rmin was about 0.3 / z m.
  • the inclination angle ⁇ of the upper and lower rolling rolls 21 and 22 was set to about 25 degrees.
  • the narrowest distance t between the upper and lower rolls 21 and 22 is set so as to form a metal plate Y having a thickness of about 6 mm.
  • the narrowest distance t between the rolls is positioned by moving the upper rolling roll 21 up and down by the roll moving device 23.
  • the molten metal contact angle ⁇ is set to about 30 degrees, and the tip 13 of the horizontal supply nozzle 12 is disposed in a noncontact manner on the lower roll 22 and this contact circumferential length L and the contact circumferential length L Of the tip 13 to be equal
  • the height of the surface of the hot water is always between the inside of the tundish 4 and the horizontal feed passage 11 of the horizontal feed nozzle.
  • the holding furnace 2 to the tundish 4 are maintained so that the hot metal surface height in the tundish 4 and the horizontal supply passage 11 is maintained constant. Molten metal X is flowing. That is, the control valve (not shown) is controlled to open and close the control valve 8 according to the height position of the float 10 floating on the surface of the tundish 4 so that the molten metal X held at a predetermined temperature in the holding furnace 2 Is made to flow into the tundish 4 through the communication passage 5.
  • the heaters 3 of the holding furnace 2 and the tandem 4 are operated to hold the molten metal X at about 720.degree.
  • the groove width of the concave circumferential groove 25 (groove width at the groove bottom 27) is about 160 mm, and the groove side walls 29, 29 constituting the concave circumferential groove 25 are as follows: Groove inclination about 5 degrees outward It is inclined at the angle ⁇ . Further, the width of the fitting convex peripheral portion 24 of the upper drawing roll 21 is also set so as to be able to be fitted in the concave peripheral groove 25.
  • the convex peripheral walls 30, 30 of the fitting convex peripheral portion 24 are formed to be substantially orthogonal to the convex top surface 26.
  • the lubricant release agent in the form of a graphite paste is applied to the groove side walls 29 and 29 of the concave groove 25 and the convex peripheral walls 30 and 30 of the fitting convex peripheral portion 24 by the above-described lubricant release agent coating device 31.
  • the agent is applied so that the application amount is almost constant.
  • a lubricant release agent is not applied to the groove bottom surface 27 of the recessed circumferential groove 25 and the convex top surface 26 of the fitted convex peripheral portion 24.
  • the upper and lower rolling rolls 21 and 22 are used to form a metal sheet with a width of about 160 mm.
  • the vertical stretching rolls 21 and 22 are rotated in opposite directions with a force toward the discharge side at a constant rotational speed.
  • the rotational speeds of the upper and lower rolling rolls 21 and 22 are controlled to be equal.
  • the cooling water is circulated in the circulation passage 35 formed inside each of the rolling rolls 21 and 22 to cool the concave circumferential groove 25 and the fitting convex circumferential portion 24.
  • the molten metal X flowing into the tundish 4 from the holding furnace 2 through the communication passage 5 is fitted into the convex peripheral portion 24 of the upper rolling roll 21 through the horizontal supply passage 11 of the horizontal supply nozzle 12. And the concave circumferential groove 25 of the lower rolling roll 22 sequentially.
  • the molten metal X is kept constant at the above-described surface level and held at a predetermined temperature, so that the molten metal and the surface of the molten metal are calmly and smoothly without disturbance.
  • the contact start points B and B with which the molten metal X contacts are the top
  • the convex top surface 26 and the groove bottom surface 27 are in a concavo-convex shape in which a large number of depressions 28 having an Ra of about 2.4 m are formed.
  • the solidified metal X can be properly pumped in, and the solidified metal X can be sequentially sent in the discharge side direction without slipping.
  • a desired metal sheet Y is formed by rolling the solidified metal X to the narrowest narrowest distance t between rolls.
  • the dendrite formed when the molten aluminum alloy solidifies is further enhanced in the action of extending along the longitudinal direction.
  • dendrites are formed so as to be substantially orthogonal to the solidification interface (two-dot chain line in FIG. 4) where molten metal X solidifies, it is necessary to carry out the rolling before being subjected to the rolling process.
  • the plate center portion is formed so as to be inclined toward the upper and lower sides in a direction toward the plate processing direction.
  • this branch-like crystal is modified by rolling into a kaw's structure elongated along the longitudinal direction. Furthermore, with this large reduction ratio rolling caulk, repair internal defects such as microvoids and cracks that may be generated during solidification or immediately after rolling and surface defects such as ripple marks by pressure bonding or smoothing. Can.
  • the metal plate Y is formed to a high quality capable of exhibiting high mechanical properties. Incidentally, when passing through the narrowest distance t between the rolls, the convex top surface 26 and the groove bottom surface 27 are separated, and the metal plate Y is released from the convex top surface 26 and the groove bottom surface 27 and discharged. Ru.
  • the convex top surface 26 and the groove bottom surface 27 in the present embodiment example have a large number of depressions 28 of about R a of about 2.4 / zm, and therefore also have an excellent mold release action, There is no damage to the surface of the metal plate Y during mold release.
  • the spread deformation acting on the groove side walls 29, 29 It is possible to reduce the mechanical force and to prevent so-called widening of the width, so it is possible to suppress the frictional force between the groove side walls 29, 29 and the solidified metal X, and the lubricant release agent applied to the groove side walls 29, 29 is peeled off. Etc. can be prevented. Therefore, the solidified metal X can be prevented from burning on the groove side walls 29, 29.
  • the metal plate Y obtained in this manner is formed into a substantially constant width and straight form, with only small burrs being formed on both side ends thereof. For this reason, even in the case of providing a processing step to adjust the both ends of the metal sheet Y, the processing step is only relatively easy processing! It takes less time.
  • the metal sheet Y was formed to about 100 m by the molten metal direct rolling mill 1 of the present embodiment. During this forming, the groove bottom surface 27 and the groove side walls 29, 29 of the concave circumferential groove 25 of the lower rolling roll 22 and the convex top surface 26 and the convex circumferential wall 30, 30 of the fitting convex circumferential portion 24 of the upper rolling roll 21. The trouble caused by burn-in and other problems did not occur. Furthermore, it was possible to take out in a relatively straight form relatively easily without any trouble caused by the solder formed on both sides of the metal plate Y. Then, it was possible to continuously form a substantially constant metal plate Y with a plate thickness of about 6 mm and a plate width of about 160 mm.
  • the metal plate Y is formed on the surface of the plate which is moderately smooth and has the desired gloss over the entire length, and only slight burrs are formed on both sides of the metal plate Y. There was a good side edge shape. Further, as a result of examining this metal plate Y in detail, it was found that internal defects, surface defects and the like did not occur over the entire length, and impurities and the like were not mixed. Furthermore, as a result of observing the structure of this metal plate Y, it is found that the tissue form stretched along the longitudinal direction is formed as a symmetrical structure in the plate thickness direction, and substantially homogeneous in the width direction The formation of tissue formation was confirmed over the entire length.
  • the inclination angle ⁇ of the upper and lower rolling rolls 61, 62 of the above-described conventional configuration shown in FIG. Lower An apparatus 60 was prepared in which the molten metal X was supplied to the side rolling rolls 62 by flowing down.
  • the fitting convex peripheral portion 64 is formed on the upper rolling roll 61 of the conventional configuration, and the concave circumferential groove 65 is formed on the lower rolling roll 62, and the fitting convex is the same as the embodiment described above.
  • the circumferential portion 64 can be fitted into the concave circumferential groove 65.
  • the convex top surface 66 of the fitting convex peripheral portion 64 and the groove bottom surface 67 of the concave peripheral groove 65 have a smooth planar shape, and the mold due to incomplete combustion of propane gas is used as a mold release agent. It is applied as.
  • the groove side wall (not shown) of the concave circumferential groove 65 of the lower rolling roll 62 is formed (the groove inclination angle is about 0 degree) substantially orthogonal to the groove bottom surface (not shown).
  • the upper and lower rolling rolls 61 and 62 use the same rolling rolls as in this embodiment except that the shapes of the inset convex peripheral portion 64 and the concave peripheral groove 65 are different as described above.
  • the distance t and the inset convex peripheral portion 64 also have the same shape.
  • the molten metal X flowing from the holding furnace 72 into the bowl-like tundish 74 flows from the tundish 74 onto the lower rolling roll 62 to obtain the vertical pressure. It is made to supply sequentially to the pool formed in the area
  • the bowl-shaped tundish 74 is narrower than the groove width of the concave groove 65 of the upper and lower rolling rolls 61, 62, and the molten metal X which flows from the tan-de-sche 74 and supplies to the pool is a roll. It is intended to spread in the width direction. Further, since the molten metal X is made to flow down onto the lower rolling roll 62, the contact circumferential length (not shown) at which the molten metal and the upper and lower rolling rolls contact is the upper rolling roll 61. In comparison, the lower roll 62 is longer.
  • a metal plate Y ′ having a plate width of 160 mm and a plate thickness of about 6 mm was formed in the same manner as the above-described embodiment.
  • seizing of molten metal occurred, so the forming was stopped.
  • the portions of the upper and lower rolling rolls 61 and 62 where the seizure occurred were examined, and the applied release agent was peeled off.
  • the portion where the burn-in occurred was present on the convex top surface 66 of the fitting convex peripheral portion 64 and the groove bottom surface 67 of the concave peripheral groove 65.
  • the metal sheet Y ′ tended to be gradually wound around the lower roll 62.
  • the molten metal direct rolling mill 1 does not cause internal defects, surface defects, etc., and has a smooth and glossy surface, and It is possible to stably produce an excellent quality metal plate capable of exhibiting high mechanical properties, which is formed in a thick, symmetrical, and laterally homogeneous structure form. Further, the molten metal direct rolling mill 1 is rolled by the concave circumferential groove 25 provided with the groove side walls 29 and 29 which are inclined outward by about 3 degrees or more and about 10 degrees or less, and the fitting convex circumferential portion 24.
  • the formed metal plate Y has a substantially constant width And, it can be formed as a substantially straight shape. Furthermore, in the molten metal direct rolling mill 1, the upper and lower rolling rolls 21 and 22 have a convex top surface 26 and a groove bottom surface 27 that form a rough surface by the depressions 28, and the convex top surface 26 and the groove bottom surface 27.
  • the inclination angle ⁇ is set based on the coefficient of friction between the groove bottom surface 27 and the groove bottom surface 27, troubles such as seizing of the molten metal X may be caused without applying a mold release agent to the convex top surface 26 and the groove bottom surface 27. As well as being prevented, the solidified metal X can be properly and sequentially fed in the direction toward the narrowest rolling end A, A without slipping.
  • the molten metal X supplied through the horizontal supply passage 11 of the horizontal supply nozzle 12 is the channel bottom 15 of the horizontal supply passage 11 and the lower rolling roll 22. It is impossible to insert it into the minute gap with the concave circumferential groove 25 and prevent the temperature of the molten metal X from changing rapidly in the horizontal supply passage 11 by this minute interval. Further, the side dams 16, 16 prevent the molten metal X from leaking to the outside of the horizontal supply passage 11.
  • the inclination angle of the upper and lower rolling rolls 21 and 22 is set from the frictional force that can be exerted by the convex top surface 26 of the fitting convex peripheral portion 24 and the groove bottom surface 27 of the concave peripheral groove 25 with which solidified metal X contacts. It is possible to draw in solidified metal X and send it appropriately in the direction of sheet feeding. Therefore, the molten metal direct rolling mill 1 can significantly reduce the frequency of occurrences of troubles and defects in the machine during molding, and also reduce the time and cost required for operations such as maintenance of the machine.
  • the hot-water direct rolling mill 1 according to the present invention, it can be practically used as a production machine for producing a desired metal sheet Y, and the excellent quality and high mechanical strength It is possible to stably produce a product having
  • the inclination angle ⁇ is preferably in the range of about 10 degrees or more and about 40 degrees or less in consideration of the shape of the rolling rolls, the friction coefficient, and the like, and more preferably about 20 degrees or more. A range of about 30 degrees or less is preferable.
  • the reduction ratio is set to be about 50% or more.
  • the rolling reduction may be appropriately set to be about 40% or more.
  • the concave circumferential groove 25 formed on the lower rolling roll 22 is inclined outward at a groove inclination angle ⁇ of about 5 degrees.
  • the groove side walls 29, 29 are provided, as described above, the groove side walls can be inclined within a range of about 3 degrees or more and about 10 degrees or less.
  • the groove side wall and the molten metal can be prevented from being seized and the formation of relatively large grit can be prevented, and the desired metal plate can be continuously formed.
  • the groove inclination angle ⁇ is about 4 degrees or more and about 7 degrees or less so that the effect of preventing seizing and the effect of forming the metal plate in a straight form can be more appropriately exhibited. It is preferable to set it as a range.
  • the minute depressions 28 are circumferentially extended by the above-described shot-peel welding. It is also possible to form by other processing methods such as a force etching tool which is uniformly provided to form asperities.
  • Ra of about 1. O / zm or more is able to further enhance the effect of preventing the molten metal from sticking and forming without causing slip and having the desired gloss. It is preferable to set it to about 2.5 m or less.

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  • Mechanical Engineering (AREA)
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Abstract

L'invention est relative à un dispositif pour le laminage direct de métal en fusion, capable de former de façon stable une tôle métallique d'excellente qualité en laminant directement un métal en fusion. Le dispositif (1) comprend une paire de cylindres de laminage supérieur et inférieur (21) et (22) disposés de telle façon qu'une surface passant par les deux axes de rotation (P1) et (P2) soit inclinée de l'ordre d'environ 45° par rapport à la direction verticale vers le côté de sortie, une buse d'alimentation horizontale (12) disposée sans contact avec les cylindres de laminage dans la direction d'inclinaison et fournissant un métal en fusion (X) entre les cylindres de laminage supérieur et inférieur (21) et (22), et un moyen de fourniture de métal en fusion (X) à la buse d'alimentation horizontale (12) tout en maintenant le niveau approximativement spécifié de métal en fusion. Les longueurs de contact périphériques (L1) et (L2) du métal en fusion en contact avec les cylindres à la fois supérieur et inférieur sont à peu près égales l'une à l'autre. Le dispositif (1) ne provoque pas de défaut de surface, il peut fabriquer de façon stable une tôle de métal ayant une structure symétrique dans la direction de l'épaisseur de la tôle, et il est largement utilisable comme dispositif de fabrication.
PCT/JP2005/004601 2004-08-06 2005-03-16 Dispositif pour le laminage direct de metal en fusion WO2006013654A1 (fr)

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JPS61235045A (ja) * 1985-04-10 1986-10-20 Hitachi Zosen Corp 薄板連続鋳造法
JPH09164454A (ja) * 1995-12-18 1997-06-24 Sumitomo Metal Ind Ltd 薄板連続鋳造装置
JPH11179496A (ja) * 1997-12-24 1999-07-06 Sumitomo Metal Ind Ltd 薄板連続鋳造用分流板および薄板連続鋳造方法

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT201600120426A1 (it) * 2016-11-28 2018-05-28 Profilglass S P A Macchina per la formazione di nastri in alluminio.
EP3326736A1 (fr) * 2016-11-28 2018-05-30 Profilglass S.p.A. Dispositif pour la fabrication des ames en aluminium
CN112986527A (zh) * 2021-01-29 2021-06-18 山东理工大学 一种表征双辊铸轧过程中熔池内传输行为的方法
CN112986527B (zh) * 2021-01-29 2023-10-10 山东理工大学 一种表征双辊铸轧过程中熔池内传输行为的方法

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