Classifications

• • 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
  • B22D11/10—Supplying or treating molten metal
  • B22D11/106—Shielding the molten jet
• • 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
  • B22D11/0637—Accessories therefor
  • B22D11/064—Accessories therefor for supplying molten metal
  • B22D11/0645—Sealing means for the nozzle between the travelling surfaces
• • 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
  • B22D11/0637—Accessories therefor
  • B22D11/0665—Accessories therefor for treating the casting surfaces, e.g. calibrating, cleaning, dressing, preheating
• • 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
  • B22D11/0637—Accessories therefor
  • B22D11/0697—Accessories therefor for casting in a protected atmosphere

Definitions

• the present invention relates to a sealing device for a twin roll forging machine.
• FIG. 1 shows an example of a twin-roll forging machine, which includes a pair of cooling holes 1 arranged horizontally and a pair of side weirs 2 attached to the cooling roll 1.
• the cooling roll 1 is configured such that cooling water flows through the roll 1 and the roll gap G can be adjusted in accordance with the thickness of the strip 3 to be produced.
• the rotation direction and speed of the cooling roll 1 are set so that each outer peripheral surface moves from the upper side toward the roll gap G at a constant speed.
• One side weir 2 is in surface contact with one end of each cooling roll 1, and the other side weir 2 is in surface contact with the other end of each cooling roll 1.
• the transition piece 4 is arranged so as to be in surface contact with the upper end of the side weir 2.
• a molten metal supply nozzle 5 is incorporated so as to be positioned immediately above the roll gap G, and from this molten metal supply nozzle 5 to a space surrounded by the cooling roll 1 and the side weir 2 When the molten metal is supplied toward the molten metal, a molten metal pool 6 is formed.
• a cover for covering the molten metal reservoir 6 is provided, and an inert gas is sent into the cover to prevent the molten metal from being oxidized.
• the rotating body around which the woven fabric is wound is arranged so as to contact the outer surface of the cover as described above and the entire length in the axial direction of the outer peripheral surface of the cooling roll 1, and the atmosphere inside the cover is laid by the woven fabric.
• a water sump cover that suppresses intrusion of water (for example, patent literature)
• nitrogen is used as the inert gas fed into the cover.
• argon with relatively low thermal conductivity is mixed with nitrogen to cover the inside of the cover.
• Patent Document 1 Japanese Patent No. 2760695
• the rotation direction of the rotating body is opposite to that of the cooling roll 1 with which the rotating body abuts when viewed from the axial direction, and therefore, between the rotating body and the cooling roll 1.
• the atmosphere is trapped, and as a result, the accompanying air to the cooling roll 1 is promoted.
• the present invention has been made in view of the above-described circumstances, and an object thereof is to provide a sealing device for a twin roll forging machine that can suppress the accompanying air to the cooling roll.
• the present invention provides a transition piece positioned above a molten metal pool formed between cooling rolls, and a molten metal pool extending in the same direction as the cooling roll and below the transition piece.
• a cylindrical brush that can rotate with respect to the entire length of the outer peripheral surface of the cooling roll in the axial direction from the opposite side of the cooling roll, and a first piece that is connected to the transition piece and also covers the cooling roll between the brushes.
• a second cowling that surrounds a portion of the first cowling that is not in contact with the cooling roll of the brush and a third cowling that is continuous with the second cowling and covers the cooling roll below the brush
• an outlet for sending sealing gas between the transition piece and the cooling roll is guided by the first, second, and third cowlings covering the cooling roll and the brush so as to reverse in the cooling roll rotating direction.
• the brush is rotated in the same direction as the cooling roll in contact with the brush, or the speed of the seal gas flowing along the outer peripheral surface of the cooling roll is set to the cooling roll peripheral speed. Try to exceed the absolute value.
• FIG. 1 is a conceptual diagram showing an example of a conventional twin roll forging machine.
• FIG. 2 is a conceptual diagram showing an embodiment of a sealing device for a twin roll forging machine of the present invention. Explanation of symbols
• FIG. 2 shows an embodiment of the sealing device for a twin roll forging machine according to the present invention.
• This twin-roll forging machine sealing device includes a cylindrical brush 7 extending in parallel with the cooling roll 1 and capable of rotating, and an outlet 8 for discharging a sealing gas S such as pure nitrogen or argon-containing nitrogen.
• a sealing gas S such as pure nitrogen or argon-containing nitrogen.
• a first cowling 9, a second cowling 10, and a third cowling 11 that are attached to each cooling roll 1 and form a flow path of the seal gas S are provided.
• the brush 7 is disposed so as to abut on the opposite side force of the molten metal pool 6 below the transition piece 4 over the entire length in the axial direction of the outer peripheral surface of each cooling roll 1, and is driven from the axial direction by a drive mechanism such as a motor.
• the brush 7 can rotate in the same direction as the cooling roll 1 with which the brush 7 is in contact.
• the outlet 8 is attached to the lower surface of the transition piece 4 so as to be positioned directly above each cooling roll 1.
• the first cowling 9 is connected to the lower surface of the transition piece 4 and covers the outer peripheral surface and end surface peripheral portion of the cooling roll 1 between the transition piece 4 force brushes 7.
• the distance between the outer surface of the first cowling 9 and the cooling roll 1 is set in the range of 5 mm to 10 mm.
• the second cowling 10 is connected to the first cowling and surrounds a portion of the brush 7 that is not in contact with the cooling roll 1, and the outer peripheral surface and the end surface peripheral portion of the cooling roll 1 located in the vicinity thereof. Covering.
• the distance between the outer periphery of the second cowling 10 and the brush 7 is set to 10 mm or less so that the dust does not enter the first cowling 9 side by the rotation of the brush 7.
• the third cowling 11 is connected to the second cowling 10, and the cooling roll 1 below the brush 7 Cover the outer peripheral surface and the peripheral edge of the edge.
• the distance between the outer peripheral surfaces of the third cowling 11 and the cooling roll 1 is set equal to or less than three times the interval between the first cowling 9 and the outer peripheral surface of the cooling roll 1 described above.
• the length of the cooling roll of the third cowling 11 in the circumferential direction is set to 50 mm or more so that the seal gas S delivered from the outlet 8 is filled to the outlet portion of the third cowling 11. And ensure that the atmosphere does not enter the interior of the third cowling 11.
• the distance between the first cowling 9 and the outer peripheral surface of the cooling roll 1 is 10 mm
• the length of the cooling roll 1 is 1350 mm
• the seal gas is delivered from the two outlets 8.
• the speed (gas flow rate) of the seal gas S flowing between the first cowling 9 and the cooling roll 1 is as follows: It becomes about 93m.
• Gas flow rate Gas discharge amount Z Number of rolls X Overall length of roll X Clearance of cowling roll
• the absolute value of the peripheral speed of the cooling roll 1 is converted to the seal gas S delivered from the outlet 8 by the first, second and third cowlings 9, 10 and 11 covering the cooling roll 1 and the brush 7. And the brush 7 that is in contact with the cooling roll 1 is rotated in the same direction as the cooling roll 1, so that the air accompanying the cooling roll 1 is effective. Can be suppressed.
• sealing device for a twin roll forging machine of the present invention is not limited to the above-described embodiments, and can of course be modified without departing from the gist of the present invention. It is.
• the sealing device for twin roll forging machine of the present invention can be applied to the production of various metal strips including steel.

Landscapes

• Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• Continuous Casting (AREA)
• Heat Treatment Of Strip Materials And Filament Materials (AREA)

Priority Applications (5)

Applications Claiming Priority (1)

Publications (1)

Family

ID=38667493

Family Applications (1)

Country Status (5)

Families Citing this family (2)

Citations (3)

Family Cites Families (5)

• 2006
  • 2006-04-26 WO PCT/JP2006/308707 patent/WO2007129372A1/ja active Application Filing
  • 2006-04-26 US US12/295,328 patent/US20090242162A1/en not_active Abandoned
  • 2006-04-26 EP EP06745685A patent/EP2011589A4/en not_active Withdrawn
  • 2006-04-26 BR BRPI0621615-3A patent/BRPI0621615B1/pt not_active IP Right Cessation
  • 2006-04-26 CN CN200680054396.1A patent/CN101426601B/zh not_active Expired - Fee Related

Patent Citations (3)

Non-Patent Citations (1)

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