Non-sinusoidal oscillation method for mold and hydraulic system for same

A hydraulic system and crystallizer technology, applied in fluid pressure actuation system components, fluid pressure actuation devices, mechanical equipment, etc., can solve problems such as reducing the surface quality of slabs

Inactive Publication Date: 2012-07-11
XINXING DUCTILE IRON PIPES CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If the parameters such as amplitude, vibration frequency and deflection rate in the non-sinusoidal vibration of the mold are not set properly, the surface quality of the slab surface will be reduced

Method used

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  • Non-sinusoidal oscillation method for mold and hydraulic system for same
  • Non-sinusoidal oscillation method for mold and hydraulic system for same
  • Non-sinusoidal oscillation method for mold and hydraulic system for same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0025] Such as figure 1 As shown, the hydraulic system of the non-sinusoidal vibration crystallizer of the present invention includes a vibration servo hydraulic cylinder 1, a position sensor 2, a first pressure sensor 3, a second pressure sensor 4, a first relief valve 5, and a second relief valve 6 , electro-hydraulic servo valve 7, accumulator group 8, pressure oil filter 9, first oil return filter 10, second oil return filter 19, check valve 11, electromagnetic overflow valve 12, hydraulic pump 13 and First and second two-position two-way manual reversing valves 17 and 18.

[0026] The oil inlet of the hydraulic pump 13 communicates with the oil tank 14, the oil supply port of the hydraulic pump 13 is connected with the oil inlet P of the electromagnetic overflow valve 12, the oil inlet P of the two accumulators of the accumulator group 8, and the one-way The oil inlet P of the valve 11 is connected, the oil outlet A of the check valve 11 is connected with the oil inlet P...

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Abstract

The invention relates to a non-sinusoidal oscillation control method for a mold of a continuous casting machine and a hydraulic control system for the same, and aims to provide a non-sinusoidal oscillation method for the mold to decrease the depth of a surface oscillation mark of a casting blank and to improve the surface quality of the casting blank. The non-sinusoidal oscillation method for the mold is characterized in that the mold is driven by a servo hydraulic system, and a PLC (programmable logic controller) control system of the mold generates a non-sinusoidal oscillation curve by inputting the control parameters of oscillation amplitude h, oscillation frequency f and deflection rate a to control the servo hydraulic system to work, wherein 1.9mm<=h<=2.3mm, 101cpm<=f<=138cpm, 6.5%<a<8.5%. The hydraulic system comprises a servo hydraulic oscillation cylinder, a position sensor, a pressure sensor, an overflow valve, an electro-hydraulic servo valve, an energy accumulator set, a pressed oil filter, a filter, a one-way valve, an electromagnetic overflow valve and a hydraulic pump.

Description

technical field [0001] The invention relates to the field of continuous metal casting, in particular to a control method and a hydraulic control system for non-sinusoidal vibration of a crystallizer of a continuous casting machine. Background technique [0002] The purpose of the crystallizer vibration is to prevent the slab from sticking to the inner wall of the copper tube of the mold during the solidification process, resulting in cracking or leaking accidents, so as to ensure the surface quality of the slab and reduce the depth of vibration marks. Since the invention of mold hydraulic vibration, it has been rapidly promoted because of its ability to adjust the amplitude, frequency and negative slip parameters online, so as to keep the negative slip rate and negative slip time within the optimal range. In high-speed, high-quality high-efficiency continuous casting production, in order to obtain a good mold vibration process effect, it is hoped that the mold vibration mode...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22D11/053F15B21/08
Inventor 陈鹏张亚彬谢兴华
Owner XINXING DUCTILE IRON PIPES CO LTD
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