• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    In a method of horizontal continuous casting with a horizontal or inclined mold (1), and heat treating the casting, which is at least partially solidified in the mold, the latter is supplied with melt (13) from a furnace or casting box preferably tippable about the center line of the mold, and via a casting pipe (2), the forward end of which projects into the mold opening. The mold (1) is movable in relation to the pipe (2) and is rotated continuously or stepwise in one direction or turned reciprocally about its center line. Bridging of solidified melt (13) between the pipe (2) and the casting skin (20) solidified in the mold (1) is prevented by a repelling electromagnetic force being caused to act in a substantially radial direction on the melt (13) flowing into the mold (1).
    公开号:SU1695822A3
    申请号:SU874202602
    申请日:1987-05-11
    公开日:1991-11-30
    发明作者:Аллан Олссон Эрик
    申请人:Эрик Олссон Аг (Фирма)；
    IPC主号:
    专利说明:

    The invention relates to metallurgy, in particular, to continuous casting on a horizontal or inclined casting plant.
    The purpose of the invention is to increase the stability of the casting process and the quality of the cast billet by healing the gaps formed in the billet shell when it is pulled.
    FIG. 1 shows the device, side view; in fig. 2 is a section A-A in FIG. one; in fig. 3 is a section BB in FIG. one; in fig. 4 - a device with a metal reservoir, side view; in fig. 5 - detail of the device, a longitudinal section; in fig. 6 — device with additional means, side view; in fig. 7 shows the device of FIG. 4, top view; in fig. 8 - 10 - means of additional processing of the device.
    The device contains a mold 1. which can freely rotate relative to the metal line 2 and is cooled by the liquid 4 sprayed by the collectors 3. The mold 1 is made of a material with good thermal conductivity, such as copper, and supported by rollers 5 and 6. The rollers are provided with flanges 7. which coincide with the groove 8, made in the mold. The latter is thus fixed longitudinally and can freely expand in this direction. The mold 1 is provided with a sprocket 9 at its output end for rotation or rotation (less than 360 °). The sprocket is driven by an engine through sprocket 11 and chain 10. Preferably, a variable speed reversing motor is used. Drive means 12 for asterisks 11 can be made different.
    The inductor is powered by alternating current, is located around the gap 13 adjacent to the input end of the mold. It is designed to prevent the melt from penetrating into the compound, which is the space between the crystallizer and the metal conduit 2 fixed to the metal receiver, through which the melt is fed into the crystallizer 1. The alternating electromagnetic field generated by the inductor excites alternating currents in the melt 14. A repulsive force is created in the direction perpendicular to the inductor and the electromagnetic field surrounding it. This force removes the melt 14 from the gap and from the surface of the mold in the zone of action of the electromagnetic field. The repulsive effect of the floor on the melt depends on the electromagnetic permeability of the material and its thickness. The distance to the inductor also plays an important role. Therefore, the wall thickness of the mold is reduced at this point (position 15). The antifriction agent does not reduce the adhesion of the melt to the wall of the mold, but reduces the friction between its wall and the crust cast on it. This agent is supplied through pipe 16. The location of pipe 16 around the crystallizer or metal conductor is determined by the agent used. The dosage of agent can be ensured by feeding a screw to extend the pipe 16 shown.
    The rolls 5 and 6 for rotation (rotation) of the mold and the driven sprocket 11 are located in the frame on the support plate 17. To perform oscillatory movements, i.e. longitudinal reciprocating movement to rotate (rotate) the mold, the support plate can be equipped with wheels, wheel segments or bushings with needle bearings 18. Thus, low friction is provided for reciprocating movement of the crystallizer and its drive means.
    The movement may be performed using an eccentric cam or cylinder-piston means 19, which may be hydraulic or pneumatic. In this case, when the crystallizer is moved in the direction of casting, the crust 20 formed acts in its longitudinal direction to compress the transverse cracks formed during the extrusion.
    A stepped motor can be used to move the mold in steps, or a system moving along with its oscillations, while the mold is rotated one step during the drawing stroke.
    In the manufacture of narrow castings or castings with different sizes, it is advisable to use the roller rings instead of the shape of the mold directly on the rolls, while the forms of various sizes can be mounted on the roller rings,
    0 The metal pipe can be equipped with an internal wear-resistant refractory material, such as zirconium oxide, aluminum oxide with a content of more than 90% A10, magnesite, etc.
    5 In FIG. 4 shows schematically a casting on a device for continuous casting of hollow ingots. The metal receiver is common to all molds and castings 21 flowing in the direction of casting,
    0 while castings can have different sizes. The metal conduit 2 installed in the metal receiver and projecting into the mold 1 must have a constant length, i.e. distance from the metal receiver
    5 to the mold should not depend on
    expansion of the metal receiver 23
    due to heat. In connection with this
    The body is equipped with a cooling jacket.
    The metal receiver 23 is mounted on the guide 24, which can be displaced in the longitudinal direction of the castings by means of the piston 25, while the guide is part of the carriage 26, which can move transversely relative to this direction. This device allows you to quickly replace metal receivers.
    The melt 27 is fed through the metal conduit 2 to the crystallizer 1, which is filled to the level corresponding to
    0 melt in the metal reservoir 23. The length of the melt meniscus inside the solidified crust of the casting and, consequently, the length over which the crust can gain thickness depends on the level of the melt in the metal receiver. The thickness5 of the walls of each casting can be determined by selecting the appropriate drawing and casting speeds, which are determined by the corresponding speeds of the drive rolls 28. Continuous drawing of the casting 21 from the mold is provided by an electromagnetic field due to the repulsive effect on the melt, while bridging is prevented
    5 between the melt solidified in the metal wire and the crust solidified in the crystallizer.
    The electromagnetic field is generated by conductor 29 through which a strong current passes and which is located at
    input area of the mold. This arrangement is due to the fact that in this case the melt flow in the metal conductor 2 is not disturbed and not interrupted.
    The drive rolls are inclined relative to the axial line of the casting for the entry of the hollow casting 21, the crust of which is rotated in the mold. If the speed of rotation of the crust is sufficiently large relative to the speed of drawing out of the casting, the thickness of the crust formed, i.e. the thickness of the walls of the casting will always be the same around the periphery. During readjustment of the device, the drive means of the casting can be located on the rotary support plates, with the help of which it is possible to change the inclination of the rolls and the speed of rotation of the casting relative to the speed of its drawing. In this case, all the rolls should be horizontally or vertically, rather than transversely, as shown in FIG. four,
    The rotation or rotation of the mold is performed by drive means, which (FIG. 4) include an electric motor 30 with a coupling 31, a chain transmission 32 and a sprocket rigidly mounted on the crystallizer. In certain cases, it is sufficient to rotate the mold due to the friction of the pulled rotating casting 21. In this case, the driving means can be disconnected by the coupling 31. The braking means can be adapted to periodically braking or stopping this movement, while half of the coupling and is turned on or off by an electromagnet.
    The casting can be cut into desired lengths using known techniques
    These machining operations can be used in a horizontal continuous casting machine when producing solid rods after casting the desired sizes with rolls, as shown in FIG. 8 and 9.
    FIG. 5 shows a device in which the molding unit and the casting are inclined in the direction of casting. The mold 1 has a cooling jacket 33. Electromagnetic inductor 34 is embedded in the jacket 33, which is made of magnetic material and equipped with at least welded strips of such material to prevent vortex leaks currents as a result of heating the shirt. An annular yoke 35 consisting of laminated plates is designed to create a magnetic flux around the inductor. Laminated ring 36 between the electrical conductor 37 and
    metal conduit 2 prevents the closure of radially directed electromagnetic forces and the violation of the flow of the melt 27 supplied through the metal conduit 2.
    To prevent the melt from sticking to the wall of the mold in the presence of an unintentional tilt, the outer front surface of the metal wire 2 is made somewhat convex (indicated by arrow B); In this case, the conductor 37, located around the metal wire, can be powered by a higher frequency current compared to the current supplied to the inductor 34, located around the mold, since there is no electrically conductive material between the melt and the conductor. The electromagnetic repulsive force is lower when using higher frequency currents, but the heat emitted by the melt is greater, which helps prevent the solidified melt from sticking to the metal conduit and forming bridges of the solidified melt between it and the crust solidified in the crystallizer in the zone of the inductor 34 termination.
    FIG. 6-10 illustrate examples of the use of the invention. The manufactured casting 21 rotating in the device is cut into desired sections in a known manner, for example using a steam lamp 38 (Fig. 6 and 7), or the casting is fed directly to a rolling mill or a horizontal forging machine.
    FIG. 8 shows a planetary rolling mill with a multiplicity of tapered rolls 39 which rotate around the casting 21 planetaryly to give it the desired dimensions. If necessary, the rotating casting may be subjected to surface treatment, for example, hot grinding to remove scale.
    During the rotation of the casting, the planetary rolling mill (Fig. 9), if necessary, can be supplemented with stationary rotating rolls 40, which simplifies the drive of the rolls as compared to the drive of the mill. FIG. Figure 9 shows only one pair of mutually opposite rolls engaging the periphery of the casting, however, three or more pairs of rolls are used to prevent the casting from forming or forming in its center of the cavity. If necessary, the rolling equipment can be replaced by holding equipment,
    Combined rolling of a rotating casting is characterized in that it is possible to produce castings of various sizes using the same workpiece size.
    in one casting operation by setting the desired gap between the rolls.
    Then, the rolled casting 21, which continues to rotate and has not yet been cut, can be directed, if necessary, after additional heating or leveling stretching when heated to a conventional rolling mill, for example, for the manufacture of rebar or wire. For this, the rotation of the casting can be stopped. This is done by rotating the lead screw 41 (Fig. 10) of the rolls for feeding the round casting into the rotating drum 42, from which the casting is fed tangentially to the rolling mill 43 for further rolling or shaping.
    As shown in FIG. 6 and 7, casting is carried out from a bucket 44 provided with a sliding gate 45 and a casting tube 46. The position of the gate and, consequently, the mass flow to the metal receiver 23 can be automatically adjusted according to its filling level. The metal receiver can be tilted around the centerline, and the casting is performed by means of a piston-cylinder 47. As the mold rotates, uniform cooling can be achieved by directly spraying water 4. Rotation or rotation of the mold is performed by driving means 48, and longitudinal oscillations — by means of a cylinder 49. Secondary cooling means are indicated by reference numeral 50, and the support rolls for rotating the casting 21 are referred to by reference number 51. Around the casting there are moving means 52 for electromagnetic action asplav in the center of the casting. The inclined rolls 28 for rotational feeding of the casting 21 are shown in different planes, but if rotation is required with respect to the feed rate, they are preferably arranged so that they engage with the casting from only two directions to obtain a simpler drive.
    The invention makes it possible to increase the stability of the casting process due to the repulsion generated by the electromagnetic force of the melt from the mold wall, since this achieves a more uniform and efficient distribution of the anti-friction agent in the metal pipeline, in particular, due to the fact that this repulsion leads to the formation of an inclined bark edge casting, s also improve the quality of the cast billets by healing the gaps formed in the casing.

    0 5 0 5 0 5
    five
    0
    权利要求:
    Claims (11)
    [1]
    1. A device for continuous horizontal or inclined casting of workpieces containing a metal receiver connected to the mold by means of a metal conductor, an inductor and mechanisms for pulling the workpiece and machining the workpiece to a predetermined cross section, while the metal conductor with its front end is buried in the cavity of the mold, so that In order to increase the stability of the casting process and the quality of the cast billet due to the healing of the gaps formed in the shell of the billet when it is pulled out, the inductor is located en outside the mold adjacent to its input end, while the electromagnetic field of the inductor is directed radially to the technological axis of the device.
    [2]
    2. Device pop. 1, characterized in that the mold is installed with the possibility of continuous or stepwise rotation with respect to the metal conductor or with the possibility of reciprocating rotation with respect to the technological axis,
    [3]
    3. The device according to claim 2, that is, that the mold is installed with the possibility of oscillatory movement along the technological axis.
    [4]
    4. The device according to claim 1, of which there is a mechanism for pulling out the - | cooking contains a means for its rotational movement.
    [5]
    5. The device according to claim 4, wherein the means for the rotational movement of the workpiece is made in the form of supporting or dragging rollers mounted on the pillars at an angle to the technological axis, which have the ability to change the angle inclination, and has the ability to change the rotational movement of the workpiece in accordance with the speed of its drawing.
    [6]
    6. Device pop. 1, characterized in that the inductor is designed with the possibility of creating an electromagnetic field that is uneven around its perimeter.
    [7]
    7. Device pop. 1, characterized in that, in order to obtain a preform in the form of a tube, it further comprises means for creating an electromagnetic field along the technological axis.
    [8]
    8. Device pop. 1, characterized in that the mold and the mechanism for pulling the workpiece are installed with their axes tilted down towards the direction of drawing the workpiece.
    [9]
    9. Device pop. 1, characterized in that the mold and mechanism for
    stretching the workpiece is set with their axes tilted upward to the direction of drawing the workpiece.
    [10]
    10. The device according to claim 1, characterized in that the mechanism for processing the workpiece to a predetermined cross section comprises tapered rollers made stationary or with the possibility of planetary rotation.
    [11]
    11. A device pop 1, characterized in that the mechanism for pulling the workpiece comprises means for preventing the rotational movement of the workpiece and means for forming a round cross-section workpiece made in the form of a curved screw having the possibility of rotation simultaneously with the workpiece.
    Fig 2
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    C / 4 # 40 Xx FIG. 9
    FIG. 8
    21 /
    FIG. YU
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    同族专利:
    公开号 | 公开日
    SE8504252D0|1985-09-13|
    EP0237558A1|1987-09-23|
    ZA866963B|1987-05-27|
    CN86106731A|1987-05-13|
    NO871949D0|1987-05-12|
    ES2001785A6|1988-06-16|
    BR8606863A|1987-11-03|
    FI872097A|1987-05-12|
    PT83360A|1986-10-01|
    AU587867B2|1989-08-31|
    EP0237558B1|1992-01-22|
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    SE464619B|1991-05-27|
    HUT43518A|1987-11-30|
    WO1987001632A1|1987-03-26|
    DE3683635D1|1992-03-05|
    FI872097A0|1987-05-12|
    SE8504252L|1987-03-14|
    DK241487A|1987-05-12|
    AU6374786A|1987-04-07|
    DK241487D0|1987-05-12|
    KR870700426A|1987-12-29|
    NO871949L|1987-07-07|
    引用文献:
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    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    SE8504252A|SE464619B|1985-09-13|1985-09-13|SETTING AND PLANTING FOR STRENGTHENING WITH HORIZONTAL OR SLEEPING COCKLE|
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