变距双滑块曲柄驱动结晶器非正弦波形及参数  

Non-sinusoidal Waveform and Parameters of Distance Changeable Double-slider Crank Mechanism for Mold

作　　者：任廷志[1] 何保卫[1] 陈锦江[1] 金昕[1] 

机构地区：[1]燕山大学机械工程学院,秦皇岛066004

出　　处：《机械工程学报》2009年第12期269-273,共5页Journal of Mechanical Engineering

基　　金：河北省自然科学基金资助项目(E2008000819)

摘　　要：针对现有液压驱动的连铸机结晶器非正弦振动技术同步性较差、伺服缸偷停和维修量大,以及机械驱动的连铸机结晶器振动装置非正弦振动振幅和特有的波形偏斜率在线不可调的问题,研究开发一种新型的变距双滑块曲柄驱动结晶器非正弦振动发生装置。该装置与以往机械式驱动的非正弦振动发生装置不同,随着变距δ的变化波形函数振幅A和偏斜率α也随之变化,实现了结晶器非正弦振动的波形偏斜率、振幅和振动频率均能在线可调,为拉坯速度和振动参数的精确同步控制创造了条件。实现的波形更加符合连铸结晶器振动的机理,在上升期具有较小且较恒定的上升速度,在下降期具有较大的负滑脱速度和较小的负滑脱时间,有利于提高铸坯质量和拉坯速度。驱动装置尺寸小、波形调节简单,投资少,特别便于现有连铸机改造,是一种较理想的连铸机结晶器振动发生装置。Because hydraulic driven continuous casting non-sinusoidal oscillation system has some disadvantages, such as bad system synchronization, missing action of servo cylinder and large amount of maintenance, and the amplitude and the waveform deviation rate cannot be on-line changed in mechanically driven continuous casting non-sinusoidal oscillation system, a new device driven by double-slider crank mechanism used for concaster mold oscillation is developed. In the new mechanically driven continuous casting non-sinusoidal oscillation system, with the changing of the rod length, the amplitude A and the waveform deviation rate a will be changed, thereby the waveform deviation rate, amplitude and fi＇equency of oscillation can be on-line adjusted. It provides a precondition for the precise synchronization control of casting speed and oscillation parameters. The developed waveform more accords with the mechanism of continuous casting mold oscillation. Its traits are lower and stabler velocity in rising period, great negative slip speed and short negative slip time in descending period. These improve the strand surface quality and casting speed. This kind of oscillation device is small in size and its oscillation wave can be adjusted easily. The equipment investment is low and it is convenient for the transformation of the existing concasters. It＇s a perfect continuous casting mold oscillation device.

关 键 词：连铸 结晶器 非正弦振动 双滑块曲柄机构 

分 类 号：TG249[金属学及工艺—铸造]