WO2015015686A1 - 引上式連続鋳造方法 - Google Patents
引上式連続鋳造方法 Download PDFInfo
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- WO2015015686A1 WO2015015686A1 PCT/JP2014/003010 JP2014003010W WO2015015686A1 WO 2015015686 A1 WO2015015686 A1 WO 2015015686A1 JP 2014003010 W JP2014003010 W JP 2014003010W WO 2015015686 A1 WO2015015686 A1 WO 2015015686A1
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- acceleration
- molten metal
- speed
- pulling
- starter
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- 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
- B22D11/041—Continuous casting of metals, i.e. casting in indefinite lengths into open-ended moulds for vertical casting
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- 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
- B22D11/01—Continuous casting of metals, i.e. casting in indefinite lengths without moulds, e.g. on molten surfaces
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- 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
-
- 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
- B22D11/14—Plants for continuous casting
- B22D11/145—Plants for continuous casting for upward casting
Definitions
- the present invention relates to a pull-up type continuous casting method.
- Patent Document 1 proposes a free casting method as an innovative pull-up type continuous casting method that does not require a mold.
- the starter is immersed in the surface of the molten metal (molten metal) (that is, the molten metal surface) (that is, the molten metal surface)
- the molten metal follows the starter by the surface film or surface tension of the molten metal.
- a casting having a desired cross-sectional shape can be continuously cast by deriving and cooling the molten metal through a shape determining member installed in the vicinity of the molten metal surface.
- the shape in the longitudinal direction is defined along with the cross-sectional shape by the mold.
- the cast casting since the solidified metal (that is, the casting) needs to pass through the mold, the cast casting has a shape extending linearly in the longitudinal direction.
- the shape defining member in the free casting method defines only the cross-sectional shape of the casting, and does not define the shape in the longitudinal direction.
- regulation member can move to the direction (namely, horizontal direction) parallel to a molten metal surface, the casting in which the shape of a longitudinal direction is various is obtained.
- Patent Document 1 discloses a hollow casting (that is, a pipe) that is formed in a zigzag shape or a spiral shape instead of being linear in the longitudinal direction.
- a molten gas is indirectly cooled by spraying a cooling gas onto a casting immediately after solidification connected to a starter.
- the solidification speed the solidification speed
- the cooling capacity for the pulled molten metal remains constant (that is, the solidification rate remains constant), and even if only the pulling speed is increased, the solidification interface rises and the pulled molten metal is broken. That is, when the cooling capacity is determined, an appropriate pulling speed corresponding to the cooling capacity is determined.
- the steel sheet is accelerated from a stopped state to a desired pulling speed (that is, an appropriate pulling speed commensurate with the cooling capacity described above).
- a desired pulling speed that is, an appropriate pulling speed commensurate with the cooling capacity described above.
- the pulling acceleration is too large, there is a problem that the molten metal pulled up by the starter is broken before the desired pulling speed is reached, and even casting cannot be performed.
- the pulling acceleration is reduced in order to prevent the molten metal from being broken during the acceleration, it takes time to reach a desired pulling speed, resulting in poor productivity.
- the present invention has been made in view of the above, and an object of the present invention is to provide a pull-up type continuous casting method that is excellent in productivity while suppressing tearing of the molten metal pulled up during acceleration.
- the up-drawing continuous casting method is as follows. It is a pulling-up-type continuous casting method for pulling up the molten metal held in the holding furnace using a starter, When accelerating the starter to a predetermined pulling speed at the start of casting, A first acceleration section accelerating at a first acceleration from a stopped state to a first speed; A second acceleration section accelerating at a second acceleration from the first speed to the second speed; And a constant speed section in which the starter is pulled up at the first speed between the first acceleration section and the second acceleration section. With such a configuration, it is possible to provide a pulling-up-type continuous casting method that is excellent in productivity while suppressing tearing of the drawn molten metal during acceleration.
- the first acceleration is an acceleration at which the molten metal pulled up by the starter is broken before reaching the predetermined pulling speed when accelerating from a stopped state
- the first acceleration of 2 is preferably an acceleration at which the molten metal pulled up by the starter is broken before reaching the predetermined pulling speed when the acceleration is continued from the stop state.
- Productivity can be increased.
- the first acceleration and the second acceleration are equal.
- the first acceleration and the second acceleration be the maximum acceleration that can be exhibited by the pulling machine that pulls up the starter. Further, the starter is moved between the second acceleration section and the third acceleration section, the third acceleration section accelerating at the third acceleration from the second speed to the third speed, and the second acceleration section and the third acceleration section. And a constant speed section that is pulled up at the second speed.
- the second acceleration may be larger than the first acceleration.
- it is particularly preferable that the second acceleration is the maximum acceleration that can be exhibited by the pulling machine that pulls up the starter.
- FIG. 1 is a schematic cross-sectional view of a free casting apparatus according to Embodiment 1.
- FIG. 3 is a plan view of a shape defining member 102 according to Embodiment 1.
- FIG. 3 is a schematic graph showing a method for accelerating the pulling speed according to the first embodiment.
- 6 is a schematic graph showing a pulling speed acceleration method according to Modification 1 of Embodiment 1.
- 10 is a schematic graph showing a pulling speed acceleration method according to Modification 2 of Embodiment 1.
- 6 is a plan view of a shape defining member 102 according to Embodiment 2.
- FIG. 6 is a side view of a shape defining member 102 according to Embodiment 2.
- FIG. 1 is a schematic cross-sectional view of a free casting apparatus according to Embodiment 1.
- FIG. 3 is a plan view of a shape defining member 102 according to Embodiment 1.
- FIG. 3 is a schematic graph showing a method for accelerating the pulling speed according to
- FIG. 1 is a schematic cross-sectional view of a free casting apparatus according to Embodiment 1.
- the free casting apparatus according to Embodiment 1 includes a molten metal holding furnace 101, a shape defining member 102, a support rod 104, an actuator 105, a cooling gas nozzle 106, and a pulling machine 108.
- the xy plane in FIG. 1 constitutes a horizontal plane, and the z-axis direction is the vertical direction. More specifically, the positive direction of the z axis is vertically upward.
- the molten metal holding furnace 101 accommodates a molten metal M1 such as aluminum or an alloy thereof, and holds the molten metal M at a predetermined temperature having fluidity.
- a molten metal M1 such as aluminum or an alloy thereof
- the surface of the molten metal M1 decreases as the casting progresses.
- the molten metal may be replenished to the molten metal holding furnace 101 at any time during casting to keep the molten metal surface constant.
- the molten metal M1 may be another metal or alloy other than aluminum.
- the shape determining member 102 is made of, for example, ceramics or stainless steel, and is disposed in the vicinity of the molten metal surface. In the example of FIG. 1, the main surface (lower surface) on the lower side of the shape defining member 102 is disposed so as to contact the molten metal surface.
- the shape defining member 102 defines the cross-sectional shape of the casting M3 to be cast, and prevents the oxide film formed on the surface of the molten metal M1 and foreign matters floating on the surface of the molten metal M1 from entering the casting M3.
- the casting M3 shown in FIG. 1 is a solid casting in which the shape of a horizontal cross section (hereinafter referred to as a transverse cross section) is a plate shape.
- the cross-sectional shape of the casting M3 is not particularly limited.
- the casting M3 may be a hollow casting such as a round pipe or a square pipe.
- FIG. 2 is a plan view of the shape defining member 102 according to the first embodiment.
- the cross-sectional view of the shape defining member 102 in FIG. 1 corresponds to the II cross-sectional view in FIG.
- the shape defining member 102 has, for example, a rectangular planar shape, and has a rectangular opening portion (a molten metal passage portion 103) having a thickness t ⁇ b> 1 ⁇ a width w ⁇ b> 1 for allowing the molten metal to pass through a central portion.
- a molten metal passage portion 103 having a thickness t ⁇ b> 1 ⁇ a width w ⁇ b> 1 for allowing the molten metal to pass through a central portion.
- the xyz coordinates in FIG. 2 coincide with those in FIG.
- the molten metal M ⁇ b> 1 is pulled up following the casting M ⁇ b> 3 by its surface film and surface tension, and passes through the molten metal passage portion 103 of the shape determining member 102. That is, when the molten metal M1 passes through the molten metal passage portion 103 of the shape defining member 102, an external force is applied from the shape defining member 102 to the molten metal M1, and the cross-sectional shape of the casting M3 is defined.
- the molten metal pulled up from the molten metal surface following the casting M3 by the surface film or surface tension of the molten metal is referred to as a retained molten metal M2.
- the boundary between the casting M3 and the retained molten metal M2 is a solidification interface SIF.
- the support rod 104 supports the shape defining member 102.
- a support rod 104 is connected to the actuator 105.
- the shape defining member 102 can be moved in the vertical direction (vertical direction) and the horizontal direction by the actuator 105 via the support rod 104. With such a configuration, the shape determining member 102 can be moved downward as the molten metal surface is lowered due to the progress of casting. Further, since the shape defining member 102 can be moved in the horizontal direction, the shape of the casting M3 in the longitudinal direction can be changed.
- the cooling gas nozzle (cooling unit) 106 is a cooling unit that blows cooling gas (air, nitrogen, argon, etc.) supplied from a cooling gas supply unit (not shown) onto the casting M3 to cool it. Increasing the flow rate of the cooling gas can lower the position of the solidification interface SIF, and decreasing the flow rate of the cooling gas can increase the position of the solidification interface SIF. Although not shown, the cooling gas nozzle (cooling unit) 106 can also move in the horizontal direction and the vertical direction in accordance with the movement of the shape defining member 102.
- the casting M3 is pulled up by the pulling machine 108 connected to the starter ST and the casting M3 is cooled by the cooling gas, the retained molten metal M2 in the vicinity of the solidification interface SIF is sequentially solidified to form the casting M3.
- Increasing the pulling speed by the pulling machine 108 can raise the position of the solidification interface SIF, and decreasing the pulling speed can lower the position of the solidification interface SIF.
- the free casting method according to Embodiment 1 will be described with reference to FIG. First, the starter ST is lowered, and the tip of the starter ST is immersed in the molten metal M1 through the molten metal passage portion 103 of the shape defining member 102.
- start-up of the starter ST is started at a predetermined speed.
- the retained molten metal M2 pulled up from the molten metal surface following the starter ST is formed by the surface film or surface tension.
- the retained molten metal M ⁇ b> 2 is formed in the molten metal passage portion 103 of the shape defining member 102. That is, the shape defining member 102 imparts a shape to the retained molten metal M2.
- the pulling speed is accelerated from the stopped state to a desired pulling speed (that is, an appropriate pulling speed commensurate with the cooling ability of the cooling gas nozzle 106).
- the free casting method according to Embodiment 1 has one feature in the method of accelerating the pulling speed at the start of casting.
- a method for accelerating the pulling speed at the start of casting will be described with reference to FIG.
- FIG. 3 is a schematic graph showing the pulling speed acceleration method according to the first embodiment.
- the horizontal axis represents time, and the vertical axis represents the pulling speed (mm / s).
- the case where the acceleration is continued at the acceleration a1 is indicated by a one-dot chain line for comparison.
- Vmax which is an appropriate pulling speed commensurate with the cooling ability of the cooling gas nozzle 106
- the retained molten metal M2 is broken into pieces.
- the acceleration a1 is, for example, the maximum acceleration that the pulling machine 108 can exhibit.
- the pulling speed reaches the speed V1
- the retained molten metal M2 is broken into pieces.
- the acceleration a2 is the maximum acceleration that can reach the maximum pull-up speed Vmax without breaking the retained molten metal M2 even if the acceleration is continued from the stopped state. That is, if the acceleration is continued from the stop state at an acceleration larger than the acceleration a2, the retained molten metal M2 is broken before reaching the maximum pulling speed Vmax. On the other hand, if acceleration is continued from the stopped state at an acceleration a2 or less, the retained molten metal M2 can reach the maximum pulling speed Vmax without being broken. As shown in FIG. 3, when the acceleration is continued at the acceleration a2, the time to reach the maximum pulling speed Vmax is time t2, which is inferior in productivity.
- a constant speed operation section is provided between the acceleration operation sections in order to improve productivity while preventing tearing of the retained molten metal M2.
- the acceleration operation at the acceleration a1 is switched to the constant speed operation before reaching the speed V1 at which the held molten metal M2 is broken.
- the speed V11 is smaller than the maximum pulling speed Vmax commensurate with the cooling capacity. Therefore, the solidification interface SIF decreases in the constant speed operation section at the speed V11.
- the operation is switched from the constant speed operation to the acceleration operation at the acceleration a1 again.
- the acceleration in the acceleration operation section need not be the same. However, it is preferable from the viewpoint of productivity improvement that the acceleration in any acceleration operation section is larger than the acceleration a2. In other words, the acceleration in the acceleration operation section is such that if the acceleration continues from the stop state at that acceleration, the holding molten metal M2 is accelerated before reaching the maximum pulling speed Vmax, thereby improving productivity. From the viewpoint of
- the operation is switched again to the constant speed operation at the speed V12 (> V1). Thereafter, the operation is switched again to the acceleration operation at the acceleration a1, and finally the maximum pulling speed Vmax is reached. That is, the constant speed operation section is provided twice.
- the number of constant-speed operation sections is preferably as small as possible from the viewpoint of productivity.
- the constant speed operation section may be provided a plurality of times.
- productivity can be improved as the length of each constant speed operation section is shorter.
- the constant speed operation section is too short, the solidification interface SIF is not sufficiently lowered in the constant speed operation section, and when the operation is switched to the acceleration operation, the retained molten metal M2 is easily broken.
- the time to reach the maximum pulling speed Vmax is time t1 ( ⁇ t2), which is excellent in productivity.
- FIG. 4 is a schematic graph showing a lifting speed acceleration method according to the first modification of the first embodiment.
- the case where acceleration is continued at an acceleration a3 smaller than the acceleration a1 and larger than the acceleration a2 is also indicated by a one-dot chain line for comparison.
- the acceleration continues at the acceleration a3, the retained molten metal M2 is broken into pieces before reaching the maximum pulling speed Vmax.
- the pulling speed reaches V2, which is higher than the speed V1, the retained molten metal M2 is broken into pieces.
- the operation is switched to the constant speed operation when the speed V21 that is larger than the speed V1 and smaller than the speed V2 is reached. That is, in the example of FIG. 4, the acceleration is reduced compared to the example of FIG. 3, while the constant speed operation section is only once. Thus, it is preferable to optimize the number of constant speed operation sections according to the acceleration. Moreover, since the retained molten metal M2 is likely to be broken immediately after the start of casting, it is preferable to start accelerating at an acceleration a3 smaller than the acceleration a1.
- FIG. 5 is a schematic graph showing a method for accelerating the pulling speed according to the second modification of the first embodiment.
- the accelerations before and after the constant speed operation section are both acceleration a3.
- the acceleration after the constant speed operation section is set to the acceleration a1 which is larger than the acceleration a3 before the constant speed operation section.
- the arrival time t4 to the maximum pulling speed Vmax in Modification 2 is earlier than the arrival time t3 to the maximum pulling speed Vmax in Modification 1. That is, the free casting method according to Modification 2 is superior in productivity to the free casting method according to Modification 1.
- a constant speed operation section is provided in the middle of acceleration at the start of casting. Therefore, when accelerating is continued, it is possible to prevent the retained molten metal M2 from being broken while accelerating at an acceleration at which the retained molten metal M2 is broken. Further, the maximum pulling speed Vmax can be reached in a shorter time than in the past, and the productivity is excellent.
- FIG. 6 is a plan view of the shape defining member 102 according to the second embodiment.
- FIG. 7 is a side view of the shape defining member 102 according to the second embodiment. Note that the xyz coordinates in FIGS. 6 and 7 also coincide with those in FIG.
- the shape defining member 102 according to Embodiment 1 shown in FIG. 2 is composed of one plate, the thickness t1 and the width w1 of the molten metal passage portion 103 are fixed.
- the shape defining member 102 according to the second embodiment includes four rectangular shape defining plates 102a, 102b, 102c, and 102d as shown in FIG. That is, the shape defining member 102 according to the second embodiment is divided into a plurality of parts. With such a configuration, the thickness t1 and the width w1 of the molten metal passage portion 103 can be changed. Further, the four rectangular shape defining plates 102a, 102b, 102c, and 102d can move in the z-axis direction in synchronization.
- the shape defining plates 102 a and 102 b are arranged to face each other in the x-axis direction. Further, as shown in FIG. 7, the shape defining plates 102a and 102b are arranged at the same height in the z-axis direction. The distance between the shape defining plates 102a and 102b defines the width w1 of the molten metal passage portion 103. Since the shape defining plates 102a and 102b can move independently in the x-axis direction, the width w1 can be changed.
- a laser displacement meter S1 may be provided on the shape defining plate 102a and a laser reflecting plate S2 may be provided on the shape defining plate 102b as shown in FIGS. .
- the shape defining plates 102c and 102d are arranged to face each other in the y-axis direction. Further, the shape defining plates 102c and 102c are arranged at the same height in the z-axis direction. The distance between the shape defining plates 102c and 102d defines the thickness t1 of the molten metal passage portion 103. Since the shape defining plates 102c and 102d are independently movable in the y-axis direction, the thickness t1 can be changed.
- the shape defining plates 102a and 102b are disposed so as to contact the upper side of the shape defining plates 102c and 102d.
- the drive mechanism of the shape defining plate 102a will be described with reference to FIGS.
- the drive mechanism of the shape defining plate 102a includes slide tables T1, T2, linear guides G11, G12, G21, G22, actuators A1, A2, and rods R1, R2.
- the shape defining plates 102b, 102c, and 102d also have a drive mechanism similar to the shape defining plate 102a, but are omitted in FIGS.
- the shape defining plate 102a is placed and fixed on a slide table T1 that can slide in the x-axis direction.
- the slide table T1 is slidably mounted on a pair of linear guides G11 and G12 extending in parallel with the x-axis direction.
- the slide table T1 is connected to a rod R1 extending from the actuator A1 in the x-axis direction.
- the linear guides G11 and G12 and the actuator A1 are placed and fixed on a slide table T2 that can slide in the z-axis direction.
- the slide table T2 is slidably placed on a pair of linear guides G21 and G22 extending in parallel with the z-axis direction.
- the slide table T2 is connected to a rod R2 extending in the z-axis direction from the actuator A2.
- the linear guides G21 and G22 and the actuator A2 are fixed to a horizontal floor surface or a pedestal (not shown). With the above configuration, the shape defining plate 102a can slide in the z-axis direction.
- the actuators A1 and A2 can include hydraulic cylinders, air cylinders, motors, and the like.
- the shape of the molten metal passage portion 103 can be changed. Therefore, the cross-sectional shape of the casting M3 can be changed during casting. Furthermore, in the acceleration operation section at the start of casting, the shape of the molten metal passage portion 103 may be controlled to be small. By reducing the mass of the retained molten metal M2, the retained molten metal M2 can be further prevented from being broken.
- the present invention is not limited to the above-described embodiment, and can be changed as appropriate without departing from the spirit of the present invention.
- the present invention can be applied to a pulling-up-type continuous casting method that does not use the shape defining member 102 as long as it is a pull-up-type continuous casting method that pulls up the molten metal using the starter ST.
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Abstract
Description
これに対し、自由鋳造方法における形状規定部材は、鋳物の断面形状のみを規定し、長手方向の形状は規定しない。そして、形状規定部材は、湯面に平行な方向(すなわち水平方向)に移動可能であるから、長手方向の形状が様々な鋳物が得られる。例えば、特許文献1には、長手方向に直線状でなく、ジグザグ状あるいは螺旋状に形成された中空鋳物(すなわちパイプ)が開示されている。
特許文献1に記載の自由鋳造方法では、スタータに連なる凝固した直後の鋳物に冷却ガスを吹き付け、間接的に溶湯を冷却している。ここで、上から下へ向かって進行する凝固の速度(以下、凝固速度という)と引上速度とがほぼ釣り合った状態で、鋳造を進行させる必要がある。例えば、引き上げられた溶湯に対する冷却能は一定のまま(つまり凝固速度一定のまま)、引上速度のみを大きくしても、凝固界面が上昇し、引き上げられた溶湯が千切れてしまう。つまり、冷却能が定まれば、その冷却能に見合った適切な引上速度が定まることになる。なお、引上速度を大きくし、生産性を向上させるには、上述の冷却能を高める必要がある。
保持炉に保持された溶湯を、スタータを用いて引き上げる引上式連続鋳造方法であって、
鋳造開始時に前記スタータを所定の引上速度まで加速する際に、
停止状態から第1の速度まで、第1の加速度で加速する第1の加速区間と、
前記第1の速度から第2の速度まで、第2の加速度で加速する第2の加速区間と、
前記第1の加速区間と前記第2の加速区間との間において、前記スタータを前記第1の速度で引き上げる等速区間と、を備えたものである。
このような構成により、加速時における引き上げられた溶湯の千切れを抑制しつつ生産性に優れる引上式連続鋳造方法を提供することができる。
さらに、前記第2の速度から第3の速度まで、第3の加速度で加速する第3の加速区間と、前記第2の加速区間と前記第3の加速区間との間において、前記スタータを前記第2の速度で引き上げる等速区間と、を更に備えていてもよい。
まず、図1を参照して、実施の形態1に係る自由鋳造装置(引上式連続鋳造装置)について説明する。図1は、実施の形態1に係る自由鋳造装置の模式的断面図である。図1に示すように、実施の形態1に係る自由鋳造装置は、溶湯保持炉101、形状規定部材102、支持ロッド104、アクチュエータ105、冷却ガスノズル106、引上機108を備えている。図1におけるxy平面は水平面を構成し、z軸方向が鉛直方向である。より具体的には、z軸のプラス方向が鉛直上向きとなる。
なお、図2におけるxyz座標は、図1と一致している。
アクチュエータ105には、支持ロッド104が連結されている。アクチュエータ105によって、支持ロッド104を介して形状規定部材102が上下方向(鉛直方向)及び水平方向に移動可能となっている。このような構成により、鋳造の進行による湯面の低下とともに、形状規定部材102を下方向に移動させることができる。また、形状規定部材102を水平方向に移動させることができるため、鋳物M3の長手方向の形状を変化させることができる。
まず、スタータSTを降下させ、形状規定部材102の溶湯通過部103を通して、スタータSTの先端部を溶湯M1に浸漬させる。
次に、図4を参照して、実施の形態1の変形例1に係る自由鋳造方法について説明する。図4は、実施の形態1の変形例1に係る引上速度の加速方法を示す模式的グラフである。図4には、加速度a1よりも小さく加速度a2よりも大きい加速度a3で加速し続けた場合についても、比較のために一点鎖線で示されている。加速度a3で加速し続けた場合も、最大引上速度Vmaxに到達する前に、保持溶湯M2に千切れが発生する。しかしながら、図4に示すように、引上速度が速度V1よりも大きいV2に到達した段階で、保持溶湯M2に千切れが発生している。
次に、図5を参照して、実施の形態1の変形例2に係る自由鋳造方法について説明する。図5は、実施の形態1の変形例2に係る引上速度の加速方法を示す模式的グラフである。図4では、定速運転区間の前後における加速度がいずれも加速度a3であった。これに対し、図5では、定速運転区間後の加速度を定速運転区間前の加速度a3よりも大きい加速度a1としている。これにより、変形例2における最大引上速度Vmaxへの到達時刻t4は、変形例1における最大引上速度Vmaxへの到達時刻t3よりも早くなる。すなわち、変形例1に係る自由鋳造方法よりも変形例2に係る自由鋳造方法の方が生産性に優れている。
次に、図6、7を参照して、実施の形態2に係る自由鋳造装置について説明する。図6は、実施の形態2に係る形状規定部材102の平面図である。図7は、実施の形態2に係る形状規定部材102の側面図である。なお、図6、7におけるxyz座標も、図1と一致している。
形状規定板102a、102bは、形状規定板102c、102dの上側に接触するように配置されている。
さらに、鋳造開始時の加速運転区間において、溶湯通過部103の形状を小さくするように制御してもよい。保持溶湯M2の質量を減らすことにより、さらに保持溶湯M2の千切れを抑制することができる。
例えば、本発明はスタータSTを用いて溶湯を引き上げる引上式連続鋳造方法であれば、形状規定部材102を用いない引上式連続鋳造方法にも適用することができる。
102 形状規定部材
102a~102d 形状規定板
103 溶湯通過部
104 支持ロッド
105 アクチュエータ
106 冷却ガスノズル
108 引上機
A1、A2 アクチュエータ
G11、G12、G21、G22 リニアガイド
M1 溶湯
M2 保持溶湯
M3 鋳物
R1、R2 ロッド
S1 レーザ変位計
S2 レーザ反射板
SIF 凝固界面
ST スタータ
T1、T2 スライドテーブル
Claims (7)
- 保持炉に保持された溶湯を、スタータを用いて引き上げる引上式連続鋳造方法であって、
鋳造開始時に前記スタータを所定の引上速度まで加速する際に、
停止状態から第1の速度まで、第1の加速度で加速する第1の加速区間と、
前記第1の速度から第2の速度まで、第2の加速度で加速する第2の加速区間と、
前記第1の加速区間と前記第2の加速区間との間において、前記スタータを前記第1の速度で引き上げる等速区間と、を備えた引上式連続鋳造方法。 - 前記第1の加速度は、停止状態から加速し続けた場合、前記所定の引上速度に到達する前に、前記スタータにより引き上げられた前記溶湯に千切れが発生する加速度であり、
前記第2の加速度は、停止状態から加速し続けた場合、前記所定の引上速度に到達する前に、前記スタータにより引き上げられた前記溶湯に千切れが発生する加速度である、
請求項1に記載の引上式連続鋳造方法。 - 前記第1の加速度と前記第2の加速度とを等しくする、
請求項1又は2に記載の引上式連続鋳造方法。 - 前記第1の加速度及び前記第2の加速度を、前記スタータを引き上げる引上機が発揮できる最大の加速度とする、
請求項3に記載の引上式連続鋳造方法。 - 前記第2の速度から第3の速度まで、第3の加速度で加速する第3の加速区間と、
前記第2の加速区間と前記第3の加速区間との間において、前記スタータを前記第2の速度で引き上げる等速区間と、を更に備えた、
請求項1~4のいずれか一項に記載の引上式連続鋳造方法。 - 前記第2の加速度を、前記第1の加速度とよりも大きくする、
請求項1又は2に記載の引上式連続鋳造方法。 - 前記第2の加速度を、前記スタータを引き上げる引上機が発揮できる最大の加速度とする、
請求項6に記載の引上式連続鋳造方法。
Priority Applications (4)
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US14/908,908 US20160158833A1 (en) | 2013-07-30 | 2014-06-05 | Pulling-up-type continuous casting method |
EP14832044.3A EP3028790A1 (en) | 2013-07-30 | 2014-06-05 | Upward-drawing continuous casting method |
CN201480041026.9A CN105392579A (zh) | 2013-07-30 | 2014-06-05 | 上引式连续铸造方法 |
KR1020167000601A KR20160018784A (ko) | 2013-07-30 | 2014-06-05 | 인상식 연속 주조 방법 |
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JP2013158202A JP6003840B2 (ja) | 2013-07-30 | 2013-07-30 | 引上式連続鋳造方法 |
JP2013-158202 | 2013-07-30 |
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US (1) | US20160158833A1 (ja) |
EP (1) | EP3028790A1 (ja) |
JP (1) | JP6003840B2 (ja) |
KR (1) | KR20160018784A (ja) |
CN (1) | CN105392579A (ja) |
WO (1) | WO2015015686A1 (ja) |
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KR102237422B1 (ko) * | 2020-05-08 | 2021-04-08 | 제일기술산업(주) | 로딩암의 작업 범위 감지 모니터링 시스템 |
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-
2014
- 2014-06-05 US US14/908,908 patent/US20160158833A1/en not_active Abandoned
- 2014-06-05 WO PCT/JP2014/003010 patent/WO2015015686A1/ja active Application Filing
- 2014-06-05 CN CN201480041026.9A patent/CN105392579A/zh active Pending
- 2014-06-05 EP EP14832044.3A patent/EP3028790A1/en not_active Withdrawn
- 2014-06-05 KR KR1020167000601A patent/KR20160018784A/ko not_active Application Discontinuation
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Also Published As
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EP3028790A1 (en) | 2016-06-08 |
KR20160018784A (ko) | 2016-02-17 |
JP6003840B2 (ja) | 2016-10-05 |
US20160158833A1 (en) | 2016-06-09 |
CN105392579A (zh) | 2016-03-09 |
JP2015027689A (ja) | 2015-02-12 |
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