Method for operating continuous casting machine
View Patent ↗A primary object of this invention is to provide a method for operating a continuous casting machine with which a mold can oscillate with a predetermined oscillation waveform since the start of operation of an oscillator. This invention is a method for operating a continuous casting machine, the method comprising: withdrawing a slab from a mold while vertically oscillating the mold with an oscillation waveform represented by the following formula (1) by selecting a value of φ according to a value of b so that the following formula (1) satisfies r(0)=0: r ( t )=( S /2){sin(ω t +φ)+ b cos 2(ω t +φ)+ b} (1) where r(t): displacement of the mold (mm), S: vibration stroke of the mold S (mm), ω: angular velocity (=2πf) (rad/s), f: oscillation frequency of the mold (Hz), t: time(s), φ: initial phase (°), and b: non-sine coefficient (0<b≤0.25).
1. A method for operating a continuous casting machine where a slab is withdrawn from a mold for continuous casting while the mold is oscillated in a vertical direction, the method comprising:
oscillating the mold so as to satisfy the following formula (2) with an oscillation waveform represented by the following formula (1):
[
Math
.
1
]
r
(
t
)
=
(
S
/
2
)
{
sin
(
ω
t
+
φ
)
+
b
cos
2
(
ω
t
+
φ
)
+
b
}
(
1
)
φ
=
±
tan
-
1
{
1
2
(
1
+
16
b
2
)
-
1
}
(
2
)
wherein r(t) is displacement of the mold (mm),
S is an oscillation stroke of the mold (mm),
ω is angular velocity (=2πf) (rad/s),
f is oscillation frequency of the mold (Hz),
t is time(s),
φ is the initial phase (rad), and
b is a non-sine coefficient (0<b≤0.25).
2. The method for operating a continuous casting machine according to claim 1 , wherein 0.15≤b.