Continuous casting machine and method for manufacturing rough-drawn wire
Patent Information
- Authority / Receiving Office
- JP · JP
- Patent Type
- Applications
- Current Assignee / Owner
- PROTERIAL LTD
- Filing Date
- 2025-01-24
- Publication Date
- 2026-08-05
Smart Images
Figure 2026126838000001_ABST
Abstract
Description
Technical Field
[0001] The present invention relates to a continuous casting machine and a method for manufacturing a rough-drawn wire using the continuous casting machine.
Background Art
[0002] Conventionally, as a method for producing a rod-shaped casting bar from a molten metal obtained by melting a raw material metal, a belt & wheel type continuous casting and rolling method is known. In the belt & wheel type continuous casting and rolling method, an endless belt is wound around a casting wheel having an annular concave groove formed on its outer peripheral surface to form an arc-shaped mold between the casting wheel and the endless belt. While rotating the casting wheel, molten metal is supplied to one end of the mold, and a casting bar is taken out from the other end of the mold. In a continuous casting machine that performs casting by this continuous casting and rolling method, as described in Patent Documents 1 and 2 for example, cooling water is applied from pipes (the tubular sprinkler in Patent Document 1, the cooling manifold in Patent Document 2) to the casting wheel and the endless belt to cool the casting wheel and the endless belt. The casting bar obtained by the continuous casting and rolling method is continuously supplied to a rolling mill and hot-rolled to become a rough-drawn wire. The rough-drawn wire is further subjected to wire drawing to become, for example, a conductor of an electric wire.
Prior Art Documents
Patent Documents
[0003] [[ID=For example, if the temperature of the casting bar supplied from the continuous casting machine to the rolling mill fluctuates from the temperature range suitable for hot rolling by the rolling mill due to the operating conditions of the melting furnace used to melt the raw metal, it may negatively affect the quality of the rough-drawn wire. Furthermore, if a device is installed to adjust the temperature of the casting bar, it is desirable to record the operating status of that device as part of the manufacturing record in order to improve traceability.
[0005] The present invention has been made in view of the above circumstances, and its object is to provide a continuous casting machine and a method for manufacturing rough-drawn wire that can adjust the temperature of continuously cast bars and improve traceability. [Means for solving the problem]
[0006] The present invention aims to solve the above problems and provides a continuous casting machine that performs casting in a continuous casting method comprising a casting wheel having an annular groove formed on its outer surface and an endless belt wrapped around the casting wheel, and which supplies molten metal to a mold portion formed by closing the groove with the endless belt and removes a casting bar from the casting outlet of the mold portion, the continuous casting machine comprising a movable nozzle having a discharge port for discharging cooling water toward the casting bar and a position detection device for detecting the position of the movable nozzle.
[0007] Furthermore, the present invention aims to solve the above problems and provides a method for manufacturing rough-drawn wire, which involves manufacturing rough-drawn wire by rolling a casting bar using a rough-drawn wire manufacturing apparatus equipped with the above-mentioned continuous casting machine and a hot rolling mill for hot rolling the casting bar obtained by the continuous casting machine, wherein the position of the movable nozzle detected by the position detection device during the manufacturing of the rough-drawn wire is recorded as production history information in the control device of the rough-drawn wire manufacturing apparatus. [Effects of the Invention]
[0008] According to the continuous casting machine and rough wire manufacturing method of the present invention, it is possible to adjust the temperature of the continuously cast bars and improve traceability. [Brief explanation of the drawing]
[0009] [Figure 1] A schematic diagram showing the general configuration of a rough-drawn wire manufacturing apparatus including a continuous casting machine according to the first embodiment of the present invention. [Figure 2] (a) is a schematic diagram showing an example of the configuration of a continuous casting machine. (b) is a cross-sectional view of (a) along line AA. [Figure 3] This is a schematic diagram showing an example of the configuration of the operating mechanism for moving a movable nozzle. [Figure 4] (a) and (b) are explanatory diagrams to illustrate the operation of the operating mechanism. [Figure 5] This is an explanatory diagram showing a schematic example of the configuration of a position detection device. [Figure 6] This is a schematic diagram showing the operating mechanism of a continuous casting machine according to the second embodiment. [Modes for carrying out the invention]
[0010] [First Embodiment] Figure 1 is a schematic diagram showing the general configuration of a rough-drawn wire manufacturing apparatus including a continuous casting machine according to the first embodiment of the present invention. This rough-drawn wire manufacturing apparatus 1 includes a melting furnace 11 that heats and melts raw copper 20 as raw material metal to make molten copper, an upper trough 121 for transferring the molten metal from the melting furnace 11, a holding furnace 13 for storing the molten metal and maintaining it at a constant temperature, a lower trough 122 for transferring the molten metal from the holding furnace 13, a tundish 14 equipped with a spout (pouring port) 141 for pouring the molten metal, a belt and wheel type continuous casting machine 15 for casting the molten metal into rod-shaped casting bars 21, guide rollers 16 for guiding the casting bars 21 continuously discharged from the continuous casting machine 15, a hot rolling mill 17 for shaping the casting bars 21 into rough-drawn wire 22 of a predetermined size using multiple sets of rolling rollers 171, a coiler (winding machine) 18 for spirally unwinding the rough-drawn wire 22 rolled by the hot rolling mill 17 onto a pallet 10, and a control device 19 for controlling each part of the rough-drawn wire manufacturing apparatus 1. The storage unit 190 of the control device 19 stores production history information 191 that shows the operating status of each part of the rough-drawn wire manufacturing apparatus 1 during the manufacturing of the rough-drawn wire 22. The production history information 191 recorded in the storage unit 190 of the control device 19, which is part of the rough-drawn wire manufacturing apparatus 1, may be output to a display device, printing device, etc., for visual visualization. This configuration further improves traceability and enhances the convenience of the rough-drawn wire manufacturing apparatus 1.
[0011] Figure 2(a) is a schematic diagram showing an example of the configuration of the continuous casting machine 15. Figure 2(b) is a cross-sectional view along line AA in Figure 2(a). In Figure 2(a), the top and bottom directions of the drawing correspond to the vertical direction.
[0012] The continuous casting machine 15 includes a casting wheel 3 that is rotationally driven around a drive shaft 150, an endless belt 4 wrapped around the casting wheel 3, a plurality of guide rollers 51 to 55 that circulate the endless belt 4, an inner water cooling pipe 61 and an outer water cooling pipe 62 arranged on the inner and outer circumferences of the casting wheel 3, a movable nozzle 70 positioned near the casting outlet 300 of the casting bar 21 in the casting wheel 3, an operating mechanism 7 that operates the movable nozzle 70, a position detection device 8 that detects the position of the movable nozzle 70, and a radiation thermometer 151 as a temperature detection device that measures the temperature of the casting bar 21. One of the plurality of guide rollers 51 to 55, guide roller 55, is biased away from the casting wheel 3 by a coil spring 50, and tension is applied to the endless belt 4 by this biasing force.
[0013] As shown in Figure 2(b), the cast wheel 3 has an annular groove 3b formed on its outer surface 3a, and molten metal is supplied from the spout 141 of the tundish 14 to one end of the mold section 30 formed by closing the groove 3b with the endless belt 4. The mold section 30 has an arc shape when viewed from a direction parallel to the rotation axis O1 of the cast wheel 3, and the cast bar 21 is removed upward from the casting outlet 300, which is the end of the mold section 30. The inner water cooling pipe 61 and the outer water cooling pipe 62 are provided in an arc shape in the areas corresponding to the inner and outer circumferences of the mold section 30.
[0014] The cast wheel 3 integrally comprises a hub portion 31 attached to the drive shaft 150, a rim portion 32 with a groove 3b formed therein, and a plurality of spoke portions 33 connecting the hub portion 31 and the rim portion 32. An inner water cooling pipe 61 is arranged inside the rim portion 32, and cooling water W is discharged onto the inner circumferential surface 32a of the rim portion 32 from a plurality of nozzles 611 provided on the inner water cooling pipe 61. The outer water cooling pipe 62 is provided with a plurality of nozzles 621 on the portion facing one side of the endless belt 4, and cooling water W is discharged onto the endless belt 4 from the plurality of nozzles 621.
[0015] The movable nozzle 70 is rod-shaped and is rotatable about a rotation axis O2 parallel to the rotation axis O1 of the casting wheel 3. The rotation axis O2 of the movable nozzle 70 is located at a position corresponding to the casting outlet 300. More specifically, the rotation axis O2 is located at a position corresponding to the lower end of the movable nozzle 70 when the movable nozzle 70 is arranged along the casting bar 21 taken out from the casting outlet 300. In FIG. 2(a), the movable nozzle 70 when moving in the direction away from the casting bar 21 is shown by a solid line, and the movable nozzle 70 when moving toward the casting bar 21 side is shown by a two-dot chain line. The position detection device 8 detects the rotational position of the movable nozzle 70 with respect to the rotation axis O2. Details of the position detection device 8 will be described later.
[0016] FIG. 3 is a schematic configuration diagram showing a configuration example of the operation mechanism 7 for operating the movable nozzle 70 together with the movable nozzle 70, the casting bar 21, and the position detection device 8. FIGS. 4(a) and (b) are explanatory diagrams for explaining the operation of the operation mechanism 7. In the present embodiment, the continuous casting machine 15 has two movable nozzles 70, and the casting bar 21 moves between the two movable nozzles 70. The two movable nozzles 70 are arranged parallel to each other so as to overlap when viewed from a direction parallel to the rotation axis O2.
[0017] Each movable nozzle 70 discharges the cooling water W from a plurality of discharge ports 700 toward the casting bar 21 taken out from the casting outlet 300, and directly cools the casting bar 21 immediately after casting. The plurality of discharge ports 700 are formed so as to be arranged in the longitudinal direction of the movable nozzle 70. When the movable nozzle 70 moves toward the casting bar 21 side, more cooling water W is applied to the casting bar 21, and the effect of reducing the temperature of the casting bar 21 is greater than when the movable nozzle 70 is separated from the casting bar 21. Further, the amount of the cooling water W applied to the casting bar 21 can be greatly increased or decreased only by changing the angle of the movable nozzle 70. For example, compared with the case where the amount of the cooling water W discharged from the movable nozzle 70, the inner water-cooling pipe 61, and the outer water-cooling pipe 62 is changed by the opening degree of the valve, the temperature of the casting bar 21 can be adjusted quickly.
[0018] The operating mechanism 7 includes a handle 71 rotated by an operator, a gearbox 72 to which the handle 71 is connected, an upper shaft 73 that moves vertically relative to the gearbox 72 by the rotation of the handle 71, a guide member 74 that guides the upper shaft 73 so that it moves vertically, a lower shaft 76 connected to the upper shaft 73 via a joint 75, a lever member 77 that is rotatably connected to the lower shaft 76 by a support shaft 761 provided at the tip of the lower shaft 76, a rotating shaft member 78 to which the lever member 77 is fixed, and a support member 79 that rotatably supports the rotating shaft member 78. The two movable nozzles 70 each have one longitudinal end corresponding to their lower end fixed to the rotating shaft member 78 and are rotatable about this longitudinal end. The rotating shaft member 78 rotates together with the lever member 77 within a predetermined angular range about the rotation axis O2.
[0019] The operator operating the handle 71 adjusts the position of the movable nozzle 70 so that the temperature of the casting bar 21, as detected by the radiation thermometer 151, falls within a predetermined temperature range suitable for hot rolling (for example, 890°C to 930°C). In other words, when the temperature of the casting bar 21 approaches the upper limit of the predetermined temperature range, the operator operates the handle 71 to bring the movable nozzle 70 closer to the casting bar 21 so that more cooling water W discharged from the movable nozzle 70 is applied to it, and when the temperature of the casting bar 21 approaches the lower limit of the predetermined temperature range, the operator operates the handle 71 to move the movable nozzle 70 away from the casting bar 21.
[0020] Information on the rotational position of the movable nozzle 70 detected by the position detection device 8, and information on the temperature of the casting bar 21 detected by the radiation thermometer 151, are recorded in the storage unit 190 of the control device 19 as production history information (traceability information) 191. This production history information 191 is referenced, for example, when any malfunction occurs in the product, the rough-drawn wire 22, or the rough-drawn wire manufacturing device 1, and is used to clarify the cause of the malfunction and to improve quality through process improvements. The production history information 191 records information on the rotational position of the movable nozzle 70 and the temperature of the casting bar 21 at predetermined time intervals (for example, 1 second).
[0021] FIG. 5 is an explanatory diagram showing a schematic configuration example of the position detection device 8. In this example, the position detection device 8 is a three-phase output type incremental encoder, and includes a rotating disk 81 in which a plurality of outer peripheral slits 811 and one origin slit 812 for origin detection are formed, a fixed slit plate 82 arranged side by side with the rotating disk 81 in the axial direction, and a plurality of light emitting elements 83 and light receiving elements 84. The fixed slit plate 82 and the plurality of light emitting elements 83 and light receiving elements 84 are fixed to a housing 85 of the position detection device 8 shown by a two-dot chain line in FIG. 5. The rotating disk 81 is fixed to a shaft 86 that is rotatably supported with respect to the housing 85, and rotates integrally with the shaft 86. The shaft 86 rotates together with the rotating shaft member 78 of the operation mechanism 7.
[0022] In the fixed slit plate 82, A-phase slits 821, B-phase slits 822, and Z-phase slits 823 are formed so that the output signal from the position detection device 8 can be made into a plurality of phases to detect the rotation direction and origin position of the shaft 86. The A-phase slits 821 and B-phase slits 822 are formed at positions facing the outer peripheral slits 811 of the rotating disk 81 so that the phase difference between the A-phase output signal and the B-phase output signal is 90°. The Z-phase slit 823 is formed at a position facing the origin slit 812.
[0023] <0000၁၀၅>The plurality of light receiving elements 84 respectively receive the light of the light emitting elements 83 that have passed through the outer peripheral slits 811 and the origin slit 812 of the rotating disk 81, and the A-phase slits 821, B-phase slits 822, and Z-phase slits 823 of the fixed slit plate 82, and output A-phase, B-phase, and Z-phase pulse signals. These pulse signals are input to the control device 19, and the position of the movable nozzle 70 is calculated by the control device 19. Note that the shaft 86 is fixed to the rotating shaft member 78 of the operation mechanism 7 so that the origin position can be detected by the Z-phase pulse signal within the angle range in which the movable nozzle 70 rotates.
[0024] (Effect of the First Embodiment) According to the first embodiment described above, the temperature of the continuously cast casting bar 21 can be adjusted by the position of the movable nozzle 70, and since the continuous casting machine 15 is equipped with a position detection device 8 that detects the position of the movable nozzle 70, the position of the movable nozzle 70 detected by the position detection device 8 can be recorded as production history information 191, improving traceability. In addition, since the position of the movable nozzle 70 is quantified by the position detection device 8, the work content of the operator operating the handle 71 of the operating mechanism 7 can be standardized, and even if there are multiple operators operating the handle 71, it becomes easier to share know-how and pass on technology among the operators.
[0025] [Second Embodiment] Figure 6 is a schematic diagram showing the operating mechanism 7A of a continuous casting machine according to a second embodiment. The operating mechanism 7A includes an electric motor 9 as an actuator controlled by a control device 19, instead of the handle 71 of the operating mechanism 7 according to the first embodiment. The electric motor 9 has a rotating shaft 91 and an encoder 92 that detects the rotational position of the rotating shaft 91. The other configurations of the operating mechanism 7A are the same as those of the operating mechanism 7 according to the first embodiment, and the electric motor 9 can change the position of the movable nozzle 70 by rotating the rotating shaft 91. The control device 19 adjusts the electric motor 9 based on the temperature measured by the radiation thermometer 151 so that the temperature of the casting bar 21 is within a predetermined temperature range suitable for hot rolling.
[0026] In this second embodiment, as in the first embodiment, the temperature of the continuously cast bar 21 can be adjusted by the position of the movable nozzle 70, and traceability is improved by recording the position of the movable nozzle 70 detected by the position detection device 8 as production history information 191. Alternatively, the encoder 92 of the electric motor 9 may be used as a position detection device to detect the position of the movable nozzle 70, and the detection result of the encoder 92 may be recorded as production history information 191.
[0027] (Summary of the embodiments) Next, the technical concept understood from the embodiments described above will be described using the reference numerals and other symbols from the embodiments. However, the reference numerals in the following description are not limited to the components in the claims that are specifically shown in the embodiments.
[0028] [1] A continuous casting machine (15) that performs casting in a continuous casting method, comprising a casting wheel (3) having an annular groove (3b) formed on its outer surface (3a), and an endless belt (4) wrapped around the casting wheel (3), wherein molten metal is supplied to a mold section (30) formed by closing the groove (3b) with the endless belt (4), and a casting bar (21) is removed from the casting outlet (300) of the mold section (30), the continuous casting machine (15) comprising a movable nozzle (70) having a discharge port (700) formed for discharging cooling water (W) toward the casting bar (21), and a position detection device (8) for detecting the position of the movable nozzle (70).
[0029] [2] The continuous casting machine (15) according to [1] above, wherein the movable nozzle (70) is rotatable about a rotation axis (O2) parallel to the rotation axis (O1) of the casting wheel (3), and the position detection device (8) detects the rotational position of the movable nozzle (70).
[0030] [3] The continuous casting machine (15) according to [2] above, wherein the movable nozzle (70) has a rod shape formed such that a plurality of discharge ports (700) are arranged in the longitudinal direction, is rotatable about one end in the longitudinal direction, and the axis of rotation (O2) of the movable nozzle (70) is located at a position corresponding to the casting outlet (300).
[0031] [4] The continuous casting machine (15) according to [1] above, further comprising: a temperature detection device (8) for measuring the temperature of the casting bar (21); an actuator (electric motor 9) capable of changing the position of the movable nozzle (70); and a control device (19) for controlling the actuator (9) based on the temperature measured by the temperature detection device (8).
[0032] [5] A method for manufacturing a rough-drawn wire, comprising a rough-drawn wire manufacturing apparatus (1) equipped with a continuous casting machine (15) described in any of [1] to [4] above, and a hot rolling mill (17) for hot rolling the casting bar (21) obtained by the continuous casting machine (15), wherein the position of the movable nozzle (70) detected by the position detection device (8) during the manufacturing of the rough-drawn wire (22) is recorded as production history information (191) in the control device (19) of the rough-drawn wire manufacturing apparatus (1).
[0033] Although the first and second embodiments of the present invention have been described above, these embodiments do not limit the invention as defined in the claims. Furthermore, it should be noted that not all combinations of features described in the embodiments are necessarily essential for solving the problem of the invention. [Explanation of symbols]
[0034] 15...Continuous casting machine 151...Infrared thermometer (temperature detection device) 19...Control device 191...Production history information 21...Casting bar 22...Roughly drawn wire 3...Cast wheel 30...Mold 300...Casting outlet 3a...Outer surface 3b…Concave groove 4…Endless belt 70…Movable nozzle 8…Position detection device 9…Electric motor (actuator) O1, O2…Rotation axis W... Cooling water
Claims
1. A continuous casting machine comprising a casting wheel having an annular groove formed on its outer surface and an endless belt wrapped around the casting wheel, wherein molten metal is supplied to a mold portion formed by closing the groove with the endless belt, and a casting bar is removed from the casting outlet of the mold portion, wherein the machine performs casting in a continuous casting manner, A movable nozzle having a discharge port formed for discharging cooling water toward the casting bar, A position detection device for detecting the position of the movable nozzle, A continuous casting machine equipped with [a specific feature / equipment].
2. The movable nozzle is rotatable about a rotation axis parallel to the rotation axis of the cast wheel. The position detection device detects the rotational position of the movable nozzle. The continuous casting machine according to claim 1.
3. The movable nozzle has a rod-like shape with multiple discharge ports arranged in the longitudinal direction, and is rotatable about one end in the longitudinal direction. The rotation axis of the movable nozzle is located at a position corresponding to the casting outlet. The continuous casting machine according to claim 2.
4. A temperature detection device for measuring the temperature of the casting bar, An actuator capable of changing the position of the movable nozzle, A control device that controls the actuator based on the temperature measured by the temperature detection device, The continuous casting machine according to claim 1, further comprising the features described in claim 1.
5. A method for producing a rough-drawn wire by rolling a cast bar using a rough-drawn wire manufacturing apparatus that includes a continuous casting machine according to any one of claims 1 to 4 and a hot rolling mill for hot rolling the cast bar obtained by the continuous casting machine, The position of the movable nozzle detected by the position detection device during the manufacturing of the rough-drawn wire is recorded as production history information in the control device of the rough-drawn wire manufacturing apparatus. A method for manufacturing rough-drawn wire.