Analysis on Buffer Oscillation Behavior for Continuous Casting Mold

doi:10.12068/j.issn.1005-3026.2024.05.008

Abstract

Abstract:

The modified eight?stage non?sinusoidal oscillation waveform of the continuous casting mold leads to less crack defects in the casting billet and has stronger ability to heal such defects. However， the acceleration of the continuous casting mold is larger， which is sensitive to oscillation impact and affects the operation of the mold easily. By rigid clamping and flexible buffering with leaf spring and flexible spring respectively， the inertial force generated by oscillation impact of mold oscillation was reduced， it can achieve the purpose of reducing the oscillation impact. Calculation results show that the stress of spiral spring is larger than that of leaf spring under the same load. When the load of the continuous casting mold is increased by 10%， the increase of maximum stress of spiral spring is 21.23 N more than that of leaf spring. By bisection‐method calculation， it is found that， by allocating 87.5% and 12.5% of the inertia force for leaf spring and spiral spring respectively， more than 90% of the impact from oscillation acceleration is reduced. These results may provide some references for the application of the eight‐stage non‐sinusoidal oscillation technology in continuous casting mold.

Key words: continuous casting, mold, non‐sinusoidal oscillation, impact, buffer oscillation

CLC Number:

TF 341.6

Xiang-ning MENG, Ming-jiang WANG, Xiang-yang LIU, Yue-wei SHENG. Analysis on Buffer Oscillation Behavior for Continuous Casting Mold[J]. Journal of Northeastern University(Natural Science), 2024, 45(5): 668-674.

Figures/Tables 13

Fig.1 Schematic diagram of the mold

Fig.2 Eight‐stage non‐sinusoidal oscillation waveform curves

Fig.3 Schematic diagram of mold oscillation

Fig.4 Force analysis diagram of mold beforeand after buffer oscillation

Table1 Parameters of the mold

d/mm	b_c/mm	v_c/(m·min^-1)	g /(m·s^-2)	η/(Pa·s)	ρ/(kg·m^-3)	m/kg	l₄/mm
30	250	-0.03	9.8	0.4	7200	50	400

Fig.5 Force curves of the mold

Fig.6 Acceleration of the mold

Fig.7 Leaf spring stress and spiral spring stress at 100% load

Fig.8 Leaf spring stress and spiral spring stress at 50% load

Fig.9 Maximal stress of leaf spring and spiral spring at different loads

Fig.10 Force and acceleration of mold before and after buffer oscillation of scheme 4

Fig.11 Force and acceleration of mold before and after buffer oscillation of scheme 5

Fig.12 Torque of eccentric shaft before and after buffer oscillation

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