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
  • B22D11/12—Accessories for subsequent treating or working cast stock in situ
  • B22D11/1206—Accessories for subsequent treating or working cast stock in situ for plastic shaping of strands
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
  • B21B—ROLLING OF METAL
  • B21B1/00—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations
  • B21B1/02—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling heavy work, e.g. ingots, slabs, blooms, or billets, in which the cross-sectional form is unimportant ; Rolling combined with forging or pressing
  • B21B1/026—Rolling
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
  • B21B—ROLLING OF METAL
  • B21B1/00—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations
  • B21B1/46—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling metal immediately subsequent to continuous casting
  • B21B1/463—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling metal immediately subsequent to continuous casting in a continuous process, i.e. the cast not being cut before rolling
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
  • B21B—ROLLING OF METAL
  • B21B15/00—Arrangements for performing additional metal-working operations specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
• • 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
  • B22D11/12—Accessories for subsequent treating or working cast stock in situ
• • 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
  • B22D11/12—Accessories for subsequent treating or working cast stock in situ
  • B22D11/1213—Accessories for subsequent treating or working cast stock in situ for heating or insulating strands
• • 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
  • B22D11/12—Accessories for subsequent treating or working cast stock in situ
  • B22D11/126—Accessories for subsequent treating or working cast stock in situ for cutting
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
  • B23C—MILLING
  • B23C5/00—Milling-cutters

Definitions

• the invention relates to a method for producing a metal strip by continuous casting, wherein first in a casting a slab, preferably a thin slab, is poured, which is deflected from a vertical orientation in a horizontal orientation, wherein in the conveying direction of the slab behind the casting machine, the slab of a Milling operation is performed in a milling machine and at least one rolling operation in at least one rolling mill. Furthermore, the invention relates to an apparatus for producing a metal strip by continuous casting.
• Continuous casting of slabs in a continuous casting plant may result in surface defects such as oscillation marks, casting powder defects or longitudinal and transverse surface cracks. These occur in conventional and thin slab casters. Depending on the intended use of the finished strip, therefore, the conventional slabs are partially flamed. Some slabs are generally flamed on customer request. The demands on the surface quality of thin slab plants are continuously increasing.
• flaming for surface treatment, flaming, grinding or milling are suitable.
• the flame has the disadvantage that the melted material can not be melted down again without treatment due to the high oxygen content.
• metal splinters mix with the grinding wheel dust, so that the abrasion must be disposed of. It therefore offers a surface treatment by milling.
• the hot milling chips are collected and can be packaged and smelted without processing without problems and thus add back to the production process.
• the method according to the invention and the associated device are therefore primarily intended for milling.
• a further embodiment of a surface milling machine is shown in DE 197 17 200 A1.
• EP 0 790 093 B1 Another arrangement of an in-line milling machine in a conventional hot strip mill for processing a pre-strip and its embodiment is proposed by EP 0 790 093 B1, EP 1 213 076 B1 and EP 1 213 077 B1.
• the inline milling machine is generally not used for all products of a Waiz program, but only for those where higher surface requirements are required. This is advantageous for application reasons and reduces the Fräsmaschinenabpart and is therefore useful.
• the fabrication process of the invention is directed to the generation of tube qualities.
• an absolute crack-free slab surface is required.
• a Vorverformungssti in a first rolling mill is necessary.
• the present invention is therefore the object of a method and an apparatus of the type mentioned in such a way that can be achieved that with high efficiency, an improved manufacturing process or processing process can take place.
• the solution of this object by the invention according to the method is characterized in that the rolling and milling operations take place immediately following the casting of the slab in the casting machine, wherein the rolling operation in at least two partial rolling operations in at least a first rolling Road and a second rolling mill is divided and wherein between the two rolling operations or immediately before the first rolling mill, the milling operation takes place in the milling machine.
• the slab can be cleaned in a cleaning and / or descaling device before the first rolling train.
• the milling machine and the first rolling line are located behind the kiln ferry in order to be able to process both strands with it.
• a furnace is arranged between the first and second rolling mill.
• a cleaning and / or descaling device can be arranged before the first rolling train.
• another furnace may be arranged before the first rolling train.
• Each rolling train may each comprise at least one rolling stand; It is particularly thought that the first rolling mill has one or two stands, which are designed as a Duo or Quartogerüst.
• the first rolling train immediately before the milling machine can be designed as a strong driver.
• the device comprises means for adjusting the employment of the milling cutter of the milling machine in dependence on the setting position, the thickness position and / or the pivoting amount of the rolling stand or strong driver in front of the milling machine.
• the milling of the slab in the milling machine is carried out according to an embodiment of the invention so that the slab top and the slab terseite are milled in the conveying direction at the same place.
• the milling of the slab in the milling machine takes place in such a way that the upper side of the slab and the underside of the slab are milled off in the conveying direction at two successive locations.
• the stitch made in the first rolling line may be a smoothing pass, especially if it is a 1-stand rolling mill.
• the first rolling mill before the milling machine can also be designed as a strong driver to ensure the safe transport of the slab through the milling machine.
• the proposed invention also eliminates any existing transverse bending of the slab. Due to the relatively low chip removal during milling, the aim is that no ski, but a straight slab is created.
• the proposed invention can also be advantageously used for molding the slab head before milling in order to facilitate threading into the milling machine.
• the rolling speeds on the roll stand can be different on the top and bottom of the slab.
• Figures 1 to 4 show schematically the side view of an apparatus for producing a metal strip by continuous casting, in which connect to a casting machine in particular rolling mills and a milling machine.
• Fig. 1 an apparatus for producing a metal strip 1 is shown by continuous casting.
• the metal strip 1 or the corresponding slab 3 is continuously cast in a casting machine 2 in a known manner.
• the slab 3 is preferably a thin slab.
• In the strand guide (casting segments) of the cast strand is deflected in a known manner from its orientation in the vertical direction V in the horizontal H or bent. After the deflection into the horizontal H, a sludge cleaning by means of cleaning agents 10 and a subsequent profile measurement or surface inspection by measuring means 11 can take place.
• the surface texture of the slab and its geometric design can be detected.
• the milling of the upper side and that of the underside of the slab 3 takes place at two successive points - viewed in the conveying direction F -, with two roller-shaped cutters 14 being used.
• the slab 3 is supported in each case by support rollers 15.
• the transport speed can be determined by the milling machine 4 regardless of the casting speed (in the casting machine 2) and independent of the second rolling mill 6 (finish rolling).
• the milling machine 4 in front of the rolling train 5 determines the transport speed of the slab 3.
• the first rolling train 5 adapts to it.
• a slab descaling 8 is provided, which is optionally used.
• the rolling train 5 which consists of two rolling stands here. With the two frameworks, a high deformation can be carried out.
• the temperature loss through the milling and rolling process in the first rolling train can largely be compensated by the subsequent second furnace 7, so that advantageously the subsequent transformation in the second rolling train 6 can take place at sufficiently high temperatures in the rolling train 6.
• the second oven 7 can also be designed as an unheated roller casing which reduces the temperature loss of the deformed slab 3. Behind the oven 7 is the descaling device 16 and the already mentioned rolling train 6.
• the rolling train 6 may consist of at least one stand (also Reversiergerüst). In general, however, 4 to 7 rolling stands in the rolling mill 6 are summarized. The further processing behind the rolling mill 6 by cooling and winding of the metal strip 1 or the stacking of thicker metal plates will not be explained here.
• a rolling mill which can be designed as Duooder Quartogerüst.
• a smoothing pass takes place, with which geometrical irregularities on the slab surface can be eliminated.
• a targeted reduction in thickness in the first rolling train 5 can already be made.
• the slab 3 then passes from there into the milling machine. 4
• the first rolling train 5 in front of the milling machine 4 can also be designed as a strong driver to ensure the safe transport of the slab 3 by the milling machine 4. After the milling machine 4, the further processing takes place analogously to FIG. 1 in a second furnace 7, descaling 16 and rolling train 6 to form a finished product 1.
• FIG. 3 A further alternative embodiment of the device is shown in FIG. 3.
• the arrangement and the task are the same as in the system according to FIG. 2. Only here is a first rolling process 5 and a surface treatment by milling in FIG. 3.
• renewed heating of the slab 3 in front of the second rolling train 6 is dispensed with.
• the plant consists of two rolling mills. After casting in the casting plant 2 and heating in the first furnace 9 and in the ferry 12, a first rolling process 5 takes place. After renewed heating of the deformed slab 3 in the second furnace 7, the surface treatment takes place here shortly before the finishing train.
• Fig. 4 is thus shown as a further variant of an apparatus for producing a metal strip 1 by continuous casting.
• the metal strip 1 or the corresponding slab 3 is again continuously cast in a casting machine 2 in a known manner. After the deflection of the slab 3 into the horizontal H, a slab cleaning by means of cleaning agents 10 and a subsequent profile measurement or surface inspection by measuring means 11 can take place. Thus, in turn, the surface texture of the slab and their geometric design can be detected.
• a descaling device 8 is positioned, in which the prepared slab 3 is cleaned or descaled. Then it enters a first rolling train 5.
• a rolling mill which can be designed as a duo or quartet scaffolding.
• a smoothing pass takes place, with which geometrical irregularities on the slab surface can be eliminated.
• a targeted reduction in thickness in the first rolling train 5 can already be made.
• the slab 3 passes after the first rolling mill 5 in a holding furnace 7 and from there into a milling machine 4. Between the holding furnace 7 and the milling machine 4 measuring means 13 are arranged for profile measurement.
• the slab 3 is milled off at its top and bottom. In this case, the milling of the upper side and that of the underside of the slab 3 takes place at two successive points - viewed in the conveying direction F, with two roller-shaped cutters 14 being used.
• the slab 3 is supported in each case by support rollers 15.
• a second rolling mill 6 is arranged, which can and will have a plurality of rolling stands.
• the slab 3 is brought to the final shape of the desired metal strip 1.
• the first rolling train 5 may thus be arranged in front of or behind the second furnace 7.
• the surface treatment can also be done in front of or behind the oven 7.
• the machining surface treatment takes place immediately before the first or alternatively between two forming steps (roll stand groups).
• the milling machine and the rolling train 5 are located immediately in front of the second furnace 7, before the remolding takes place with good input surface quality to the desired final thickness in the finishing train 6.
• the arrangement of a roll stand 5 can also be behind the holding furnace 7.
• the surface machining is directly between the Walz pieces 5 and the holding furnace 7 conceivable, so that a reheating after pre-deformation and surface processing can be performed.
• a respective milling drum can be seen on the top and bottom.
• two milling units in a row each at the top and bottom.
• milling cutters As an alternative to the use of milling cutters, it is also possible to use other milling cutters, such as end milling cutters, or grinding tools or other surface removal tools (such as flames of the surfaces) at the intended locations. It is therefore possible that, as an alternative to the use of milling cutters or face milling cutters, other removal tools are also used.
• a cutting material for the cutting plates of the milling cutter can be provided in particular: HSS; uncoated or preferably coated hard metals; ceramics; polycrystalline cutting materials.
• HSS high-strength-strength-strength-strength-strength-strength-strength-strength-strength-strength-strength-strength-strength-styl-styl-styl-styl-diol-diol, nitride, nitride, nitride, silicon-styl-styl-styl-styrene-styrene-styrene-styrene-styrene-styrene-styrene-styrene-styrene-styrene-styrene-styrene-styrene
• the milling machine can consist of two or more milling units per slab side, which can be arranged one behind the other.
• the milling machine can set the transport speed of the slab independently of the casting machine and the second rolling line in front of the first rolling stand.
• the furnace behind the milling machine serves primarily to compensate for the temperature loss in the area of the milling machine and the first rolling mill.
• the first rolling line is preferably targeted a sharpening of the slab head.
• the setting position of the rolling stand or strong driver in front of the milling machine can also be used. Ie. for the adjustment of the cutters, in particular the Walzenfräseranstellpositionen, the thickness position and the pivot value of the roll stand or driver are used.
• a detected skew can be decided to adapt to this and mill the slab evenly over the width or Facilitzufäsen the slab wedge.

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• Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• Metal Rolling (AREA)
• Continuous Casting (AREA)

Applications Claiming Priority (3)

Publications (1)

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Family Applications (1)

Country Status (14)

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• 2007
  • 2007-05-14 DE DE102007022931A patent/DE102007022931A1/de not_active Withdrawn
  • 2007-05-22 TW TW096118120A patent/TW200812724A/zh unknown
  • 2007-05-23 CA CA2651739A patent/CA2651739C/en not_active Expired - Fee Related
  • 2007-05-23 KR KR1020087027478A patent/KR101068460B1/ko not_active IP Right Cessation
  • 2007-05-23 RU RU2008151784/02A patent/RU2397842C1/ru not_active IP Right Cessation
  • 2007-05-23 AU AU2007267472A patent/AU2007267472B2/en not_active Ceased
  • 2007-05-23 MX MX2008015061A patent/MX2008015061A/es unknown
  • 2007-05-23 WO PCT/EP2007/004561 patent/WO2007137740A1/de active Application Filing
  • 2007-05-23 EP EP07725461A patent/EP2032284A1/de not_active Withdrawn
  • 2007-05-23 US US12/227,531 patent/US20090178778A1/en not_active Abandoned
  • 2007-05-23 JP JP2009511400A patent/JP2009537331A/ja active Pending
  • 2007-05-24 AR ARP070102267A patent/AR061184A1/es unknown
• 2008
  • 2008-11-06 EG EG2008111804A patent/EG25146A/xx active
  • 2008-11-25 MY MYPI20084782A patent/MY142726A/en unknown

Non-Patent Citations (1)

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