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
  • B22D11/04—Continuous casting of metals, i.e. casting in indefinite lengths into open-ended moulds
  • B22D11/057—Manufacturing or calibrating the moulds
• • 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
  • B22D11/04—Continuous casting of metals, i.e. casting in indefinite lengths into open-ended moulds
  • B22D11/053—Means for oscillating the moulds
• • 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
  • B22D11/07—Lubricating the moulds
• • 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
  • B22D11/124—Accessories for subsequent treating or working cast stock in situ for cooling

Definitions

• the invention relates to a device for changing a changing part of a mold arrangement of a continuous casting installation according to the preamble of claim 1 and a method for operating a device according to claim 1.
• a mold or at least one component of the mold usually has to be replaced from time to time.
• the action of a strand which solidifies in the mold cavity of a mold on the mold cavity wall delimiting the mold cavity leads to signs of wear in the long term and requires repair or replacement of the mold cavity wall.
• Incidents that occur during the casting operation such as breakthroughs in a strand shell or overflows of the metal melt via the pouring opening of the mold, generally lead to an interruption of the casting operation on the mold concerned.
• parts of the continuous casting plant in particular the mold or parts of the mold and strand guiding devices below the mold, have to be freed of solidified metal or even replaced before the casting operation can be started again.
• molds are usually carried by a holding device which is designed in such a way that the molds can be oscillated in a casting position.
• the holding device is usually designed as an oscillating table, which is accessible from above for the installation and removal of a mold.
• intermediate vessels are arranged in the casting operation above the molds, from which molten metal is poured into the mold cavity, usually several molds with melt being supplied from one intermediate vessel with several spouts.
• the movable sliding table requires open pits along the travel path in the Giessbühenteil, which are undesirable for safety reasons.
• large strand spacings and thus large intermediate vessels are required. Installation of this changing device in multi-strand systems not only leads to a high level of design effort, but also to high operating costs due to the maintenance of the wear-prone intermediate vessels.
• fluctuations in the casting parameters occur, for example differences in the casting temperature or the overheating temperature in the different molds. These fluctuations usually increase with increasing strand spacing and lead to unacceptable fluctuations in the quality of the strands drawn from the different molds.
• a device for changing a mold in a continuous casting machine equipped with an oscillating holding device for the mold is known.
• the holding device comprises a platform on which the mold can be fastened in an operating position and the height of which can be changed with the aid of two lever systems provided with independent drives.
• a first lever system enables the platform to be lowered and raised and serves as a transport device for transporting the mold from the operating position to a second position, in which the mold can be gripped by a second transport device below the casting platform, lifted off the platform and transported further.
• a second lever system enables the mold to oscillate around the position specified by the first lever system by moving the assembly formed from the mold, the platform and the first lifting system as a whole using the second lever system.
• This construction has the disadvantage that a relatively large total mass has to be kept in motion in the casting operation for the oscillation of the mold and that the first lever system has to be stabilized against the vibrations transmitted by the second lever system in order to be able to maintain the casting conditions in a controlled manner over a longer period of time.
• Furthermore, in the initial phase of the mold change with the Transport device can be moved a relatively large mass in addition to the mold.
• the invention has for its object to avoid the disadvantages of the known devices and to provide a structurally simplified device and a method for changing an interchangeable part of a mold arrangement of a continuous casting plant, it should be possible in a multi-strand system with ongoing casting operation, the change process in a single to carry out the selected mold.
• the mold in addition to a mold cavity wall that forms a strand, comprises a support structure for the mold cavity wall.
• a separable connection of the mold cavity wall to the oscillatable holding device can be produced with the support structure.
• the holding device determines the casting position of the mold.
• a part of the mold arrangement is regarded as a stationary part, which is connected to the change part in the casting operation and defines and remains the spatial arrangement of the change part, hereinafter called the change position of the change part, when the change part is removed from the operating position with the aid of the transport device.
• the stationary part comprises at least the holding device.
• the interchangeable part comprises at least one component of the mold, the holding device and the interchangeable part being designed in such a way that the interchangeable part can be moved from the operating position into a space below the casting position after being separated from the stationary part by means of the transport device. Because the change part is first separated from the stationary part at the start of a change process, the change part is decoupled from the oscillatable holding device. In this way it is possible to change the changing part without moving the stationary part. The mass load on the transport device during operation can thus be reduced to a minimum. Furthermore, the transport device can be designed in such a way that it is separated from the holding device and in the casting operation the holding device can be oscillated together with the mold without being influenced by the transport device.
• the interchangeable part can be moved from the operating position into a space below the casting position by means of the transport device after the separation from the stationary part, the interchangeable part can also be exchanged during the casting operation in multi-strand systems, even if intermediate vessels via the molds provide access to the Block interchangeable parts from above.
• multi-strand systems with any strand spacing can be realized and a device according to the invention, adapted to a predetermined strand spacing, can be constructed.
• the strand spacing can be minimized if the transport device is designed, for example, in such a way that a mold can be moved in the strand guiding direction into the space below the casting position. In this way, a movement of the mold in the direction of an adjacent strand is avoided.
• Different embodiments of the device according to the invention differ in the design of the mold arrangement. This can be designed so that parts of the mold and / or the mold can be changed. The interchangeable part can be grasped by the transport device.
• the interchangeable part consists only of the mold cavity wall of the mold.
• the stationary part of the mold arrangement can be equipped with guide elements in order to facilitate automatic positioning of the interchangeable part when moving into its operating position. Seals, which can be integrated into the guide members, are provided in order to automatically seal the mold cavity wall when changing against the leakage of coolant with which the mold cavity wall can be acted upon.
• This embodiment is particularly easy to implement in connection with a mold with spray cooling; in this case a spray cooling device for cooling the mold cavity wall can be assigned to the stationary part of the mold arrangement.
• this embodiment is also applicable to molds with water jacket cooling.
• the interchangeable part is formed from the mold cavity wall with a coolant channel for cooling the mold cavity wall.
• the coolant channel can be designed, for example, as a water jacket cooling surrounding the mold cavity wall.
• the interchangeable part comprises the mold in its entirety.
• the support structure of the mold cavity wall is separably connected to the holding device in such a way that the mold can be grasped by the transport device and can be moved out of the operating position into a space below the casting position.
• the mold or mold arrangement can usually comprise devices which serve to influence the casting and / or solidification processes and / or to monitor and / or control the function of the continuous casting installation. Further embodiments according to the invention can be differentiated according to which of the devices mentioned can optionally be attributed to the stationary part of the mold arrangement or the interchangeable part.
• devices on the interchangeable part which are intended to act directly on an emerging strand at the outlet opening of the mold cavity.
• These devices include, for example, castors and / or spray cooling devices and / or an electromagnetic stirrer for the strand.
• Devices that need to be replaced less frequently can advantageously be formed as part of the stationary part of the mold arrangement and, for example, connected to the holding device in the periphery of the mold or, if the support structure for the mold cavity wall is attributable to the stationary part, can be arranged on the support structure .
• Such devices are, for example, devices for electromagnetic stirring and / or braking for molten metal in the mold cavity and / or in the strand or a spray cooling device for the strand. If such devices are particularly heavy, their assignment to the stationary part of the mold arrangement leads to a particularly advantageous embodiment of the device according to the invention, since the transport device can be designed for lower loads.
• devices which are to be operated in connection with complex supply facilities can advantageously be used in the stationary part of the mold arrangement.
• Assignment must be assigned so that the connection to the supply facility does not have to be excessively complex, for example in the form of detachable supply connections.
• This category includes, for example, measuring devices for controlling the casting operation, in particular for measuring a casting level and / or for checking the temperature of parts of the mold.
• an interchangeable part which comprises one or more components which require a supply by means of stationary supply connections.
• the stationary part has at least one supply connection and the interchangeable part is designed such that when the interchangeable part is exchanged, the supply connection is coupled or uncoupled to a corresponding supply connection of the interchangeable part in order to establish or disconnect a supply connection.
• supply connections can be used to supply energy or coolants or lubricants or to exchange signals.
• an automatically connected supply connector can be used to supply electrical energy to an electromagnetic stirrer integrated in the interchangeable part, to supply lubricant to a lubricant line opening into the mold cavity, or to measure and / or control signals between a controllable device connected to the interchangeable part or a measuring probe, for example a temperature probe Measurement of the temperature in the mold cavity wall or other segments of the interchangeable part can be exchanged with control and / or measuring devices in the periphery of the interchangeable part.
• the transport device can comprise a lifting device with which the interchangeable part can be connected and which is designed such that the interchangeable part of the operating position can be moved into the space below the casting position.
• the transport device can be designed such that the interchangeable part can be moved from the operating position at least along a tell path essentially tangentially to the strand guiding direction at the outlet opening.
• This embodiment of the transport device has the advantage that the changing part covers a particularly small volume when changing. In this way it is possible to build the mold arrangement in a particularly compact manner.
• components of the stationary part of the mold arrangement for example an electromagnetic stirrer or a pouring level measuring device, are as close as possible to the interchangeable part. tion, the exchangeable part must be removed from its operating position when changing with little freedom of movement.
• the interchangeable part can be moved from the operating position in a piece-wise straight and / or piece-wise curved path. This results in the possibility, which can be used with advantage, of moving the interchangeable part from the operating position into any desired, expedient position in which the interchangeable part can be subjected to further treatment.
• the transport device in such a way that it can be positioned outside the secondary cooling chamber and the interchangeable part can be detected through a closable opening in the cooling chamber wall and after a movement tangential to the strand guiding direction it can be conveyed out of the secondary cooling chamber.
• the transport device In the casting operation, the transport device would be largely protected by the cooling chamber wall from damaging influences of the casting operation, for example starting from strand breaks. It is also possible to design the transport device as a mobile unit.
• this construction offers the advantage that several molds can be operated with the same transport device, in that the transport device is suitably positioned in the vicinity of the exchangeable part to be replaced. It is also conceivable to arrange the transport device stationary with respect to the continuous caster. For example, a transport device can be assigned to each mold. In this case, there is no need for complex positioning of a transport device once set on a replaceable part. This simplifies automation of a device according to the invention.
• Fig. 1 shows a vertical section through a mold arrangement
• F Fiigg. 3 3 shows a vertical section through a further example of a mold arrangement
• FIG. 5 shows a section along the line IV - IV of FIG. 4
• 6 shows a vertical section through a further example of a mold arrangement
• FIG. 7 shows a section along the line VI-VI of FIG. 6.
• Fig. 1 shows a mold arrangement 1, which protrudes through an opening in a bottom 6 of a casting platform.
• the mold arrangement 1 comprises a mold 2 with a mold cavity 3 and a holding device 4 for the mold 2.
• the mold 2 is provided as an interchangeable part of the mold arrangement 1 and can be separated from the other components of the mold arrangement 1 forming a stationary part and by means of a transport device 23 be moved.
• reference numerals 2a, 2b etc. are used to identify the mold 2 in different positions.
• the mold cavity 3 is formed by a mold cavity wall 9 with a pouring opening at the upper end and an outlet opening for a strand 3 ′ at the lower end of the mold 2.
• the strand 3 ' is shown as a solidified strand residue, which is cut off directly at the outlet opening of the mold 2 and has an upper end 3 "which corresponds to the casting level in the casting operation.
• the mold 2 has an outer jacket 20, which serves as a support structure for the mold cavity wall 9 and can be connected to the holding device 4.
• the space between the jacket 20 and the mold cavity wall 9 is designed for the flow of a coolant, for example water, with a gap between the mold cavity wall 9 and one Mold cavity wall 9 surrounding tube 49 serves as a coolant channel through which the coolant can be supplied from a feed 15 'to a discharge 16'.
• the holding device 4 is designed as a mold table 4 'with an opening through which the mold 2 can be brought into a casting position 2a from below, and with wedges 13' which can be moved along the mold table 4 '. As indicated in FIG. 1 by a double arrow in the strand guide direction, the holding device 4 can be oscillated by means of a drive (not shown).
• the casting position 2a is defined by the positioning organ 13 connected to the mold 2, which are to be brought into a detachable connection with the mold table 4 'by means of the wedges 13'.
• the ends of the inlets and outlets 15 'and 16' for the coolant facing away from the shell 20 of the mold are each designed as supply connections.
• a temperature measuring device 70 is indicated in FIG Measurement of the temperature of the coolant is installed at the outlet end of the tube 49 and can be connected via electrical contacts on the outside of the mold to corresponding contacts 71 on the casing 11, in order to supply electrical energy or to exchange measurement and / or control signals to care.
• the transport device 23 enables the mold 2 to be moved with two degrees of freedom and is composed of a plurality of functional groups 23a, 23b, 23c, 23d.
• a connection between the transport device 23 and the mold 2a can be established via a coupling element 23d.
• the coupling element 23d can be moved in the arrow direction 23 'by means of the linear drive 23c, the linear drive 23c in turn being able to be moved in the arrow direction 23 "by means of the swivel arm 23b and a stationary swivel device 23a for the swivel arm 23b.
• the coupling element 23d is connected to the mold 2a after the transport device 23 has been suitably positioned, and the connection of the mold 2a to the holding device 4 is released by moving the wedge 13 '. Then, by actuating the linear drive 23c, the mold is moved along the arrow 23 ', ie essentially tangentially to the direction of the strand 3' at the outlet opening of the mold 2a, into a space 29 below the casting position 2a, the supply connection of the supply or Drains 15, 15 'or 16, 16' at the coupling points 15 "or 16" is released. Openings in the mold table 4 'and in the casing 11 serve as guide surfaces 4 "and 11'.
• the mold 2 can then be actuated by the pivoting device 23a into a position expedient for further treatment of the mold 2, for example into the position in FIG. 1 indicated position 2b, these operations are reversible for inserting a new mold 2 into the casting position 2a.
• 2 shows a casting vessel 30, which serves as an intermediate vessel for two strands 3 ', above two mold arrangements 1'.
• the mold arrangements 1 'sit on a mold table 4' which can be set in vibration by an oscillation device 5.
• the mold arrangements 1 ' are each made up of an interchangeable part, consisting of a mold 2' with a mold cavity wall 9 and with a support structure 10 designed as a cooling water housing for the mold cavity wall 9, and a stationary part.
• the stationary part comprises the mold table 4 ', coupling devices 14 with inlets and outlets 15 and 16 for cooling water for connecting the support structure 10 to a cooling water circuit.
• the coupling devices 14 also serve as holding devices for the
• Interchangeable part and are designed as sliding plates that can be moved transversely to the direction of the strand (arrow 17). For reasons of a better overview, the drive for the movement according to arrow 17 is omitted.
• An additional holding device for the pour-side half of the interchangeable part is a lubricating oil distribution plate 18, which forms the upper part of a casing 11 of the mold 2 '.
• a conical guide surface 19 serves simultaneously as the centering of the interchangeable part and as a coupling surface for lubricating oil which is supplied via a line 21.
• a lifting device 22 is shown as a telescopic lifting cylinder in the secondary cooling chamber 7.
• a gripping device 24 is shown as a connecting link between the lifting device 22 and the interchangeable part.
• the gripping device 24, provided with a centering guide 25 and movable bolts 26, can, together with the lifting device 22, change in the vertical direction, i.e. essentially axially to the mold cavity wall 9, pull it out of its operating position or insert it into it from below.
• the lifting device 22 is arranged on a carriage 27 which can be inserted and fixed in the secondary cooling chamber 7 on an intermediate stage 28. Before the carriage 27 can be pushed into the secondary cooling chamber 7, a cast strand which may be clamped in the mold must be cut off below the mold and removed. Before or after the separation, the spray devices of the secondary cooling and, if present, guide rollers are removed by pivoting or moving away.
• the same reference numerals are used for identical parts of the mold arrangements.
• a separated strand part 31 which is stuck in a mold 2 "is shown in a mold arrangement 1".
• the mold 2 is provided as an interchangeable part.
• the support structure 10 for the mold cavity wall 9 of the mold 2 is provided with a guide 32 for cooling water circulation along the mold cavity wall 9.
• the mold cavity wall 9 is curved and can have a round or rectangular etc. cross section.
• the outer shape of the support structure 10 is cylindrical or Prismatic design so that the interchangeable part can be pulled out or pushed into the operating position in the direction of an arrow 33 in a straight line, perpendicularly and essentially axially to the mold cavity wall 9.
• the mold arrangement 1 "in FIG. 3 is provided with various additional devices.
• An electromagnetic stirring or braking device 51 is arranged within the casing 11 and the mold 2".
• a stirrer 34, casters 35 and spray devices 36 are provided on the mold 2 ".
• the mold cavity wall 9 and the support structure 10 are gripped by the appropriately designed gripping device 38 and pulled out vertically Lifting device can place the defective interchangeable part in a vertical position on an interchangeable part feeding device or pick up the new one.
• the changing parts can also be mechanically lifted or set down in a horizontal position by the changing part feeding device In the casting position, the interchangeable part is held or clamped to the casing 11 by coupling devices 14 in the form of sliding plates which can be moved along guides 39 and by the conical guide surfaces 19.
• the mold can also be changed with a crane when the system is at a standstill from above a casting platform 41. After removal of the lubricating oil distribution plate 18, it is possible to pull the mold 2 "upwards. However, it is also possible to remove the mold arrangement 1", i.e. the mold 2 "and the casing 11, as a unit with or without mold table 4 ', are to be exchanged upwards.
• FIGS. 4 and 5 show a mold arrangement with an interchangeable part, which consists of a segment of a mold 2 '", in particular a mold cavity wall 40 and a sealing flange 43, and has guide surfaces 42, 44.
• the sealing flange 43 is connected to the mold cavity wall 40
• the circular guide surface 44 also has the function of a sealing surface and is supported on a surface 45 of a further annular flange 46.
• the flange 46 belongs together with the support structure formed from a guide and support flange 48 and a side wall 47 ' 47 for the mold cavity wall 40, a water jacket 49 and a stirring device 50 for the stationary part of the mold 2 '".
• a part of a partially illustrated lifting device 56 for pulling out the mold cavity wall 40 is visible below the mold.
• a connection between the sealing flange 43 and the lifting device 56 can be created by means of hammer head bolts 57.
• a mold cavity wall 60 of a mold 2 "" is installed in a support structure 61.
• a spray water cooling system consisting of spray tubes 62 and spray nozzles 63 is arranged, which are connected to a supply network via a cooling water supply line 72 and a cooling water discharge line 73.
• the interchangeable part of the mold arrangement 1 "" consists of the mold cavity wall 60, an upper sealing flange 65 with a lubricant supply 66 and a lower sealing flange 67 which is supported on a flange 68 of the support structure 61.
• a coupling part of a lifting device 69 is shown schematically.
• Another flange 70 is arranged between the upper sealing flange 65 and the support structure 61. This flange 70 can together with the
• Interchangeable part can be removed with a lifting device 75 when the intermediate vessel is removed.
• the mold arrangements in FIGS. 1-7 have interchangeable parts that can be exchanged according to the invention in the following process steps:

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• Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• Manufacturing & Machinery (AREA)
• Continuous Casting (AREA)
• Casting Devices For Molds (AREA)
• Moulds For Moulding Plastics Or The Like (AREA)
• Confectionery (AREA)

Applications Claiming Priority (3)

Publications (2)

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• 1998
  • 1998-07-16 PL PL98338470A patent/PL338470A1/xx unknown
  • 1998-07-16 EP EP98941350A patent/EP0999907B1/fr not_active Expired - Lifetime
  • 1998-07-16 KR KR10-2000-7000756A patent/KR100529588B1/ko not_active IP Right Cessation
  • 1998-07-16 CA CA002300388A patent/CA2300388A1/fr not_active Abandoned
  • 1998-07-16 CZ CZ20000466A patent/CZ302003B6/cs not_active IP Right Cessation
  • 1998-07-16 ES ES98941350T patent/ES2183408T3/es not_active Expired - Lifetime
  • 1998-07-16 AT AT98941350T patent/ATE222519T1/de not_active IP Right Cessation
  • 1998-07-16 AU AU89763/98A patent/AU728547B2/en not_active Ceased
  • 1998-07-16 BR BR9811138-8A patent/BR9811138A/pt not_active IP Right Cessation
  • 1998-07-16 TR TR2000/00367T patent/TR200000367T2/xx unknown
  • 1998-07-16 DE DE59805256T patent/DE59805256D1/de not_active Expired - Fee Related
  • 1998-07-16 CN CN98807913A patent/CN1096899C/zh not_active Expired - Fee Related
  • 1998-07-16 JP JP2000507073A patent/JP2001513444A/ja active Pending
  • 1998-07-16 WO PCT/EP1998/004447 patent/WO1999007498A1/fr active IP Right Grant
  • 1998-08-05 ZA ZA987015A patent/ZA987015B/xx unknown
• 2000
  • 2000-02-08 US US09/499,945 patent/US6289973B1/en not_active Expired - Fee Related

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