基于自适应模糊控制的轧辊变速磨削研究

发布时间：2018-07-06 06:51

本文选题：轧辊辊型 + 在线测量　；参考：《内蒙古工业大学》2015年硕士论文

【摘要】：传统提高轧辊表面及辊型磨削精度的有效方法主要是专注于磨削过程中砂轮和工件的变化,主要有考虑工件轴向刚度最薄弱处,设计中心架以便提高工件的刚度;采取磨削颤振抑制、误差补偿和分析机床变速磨削的机理、变速磨削等措施。在分析变速磨削的机理、变速磨削与磨削颤振抑制、磨削精度之间的关系的基础上,提出了根据轧辊的具体材质、轧辊辊型结构,合理确定所用砂轮自身的磨削特性以及具体磨削加工工艺参数,基于直接自适应性模糊控制的轧辊变速微进给磨削工艺策略。并在充分考虑轧辊磨床、轧辊系统沿轧辊轴向刚度的变化、控制磨削中轧辊变形的基础上提出了基于自适应模糊控制的变速磨削微进给优化自适应性控制的新策略,为提高轧辊磨削的精度提出了一种新的较有突破性、有效解决方法。目前对在线测量技术的应用已经趋于成熟,并且在机械加工领域中得了广泛的应用,为机械加工提供实时加工参数,而且为提高加工效率、保护工件和机床、减小加工误差提供了保障。在先进技术支持的基础上,分析了轧辊磨削检测在钢性板材生产过程中的重要性及目前轧辊辊型及表面粗糙度检测方法的局限性,设计了一种轧辊辊型在线测量仪,克服了轧辊磨削时合成的曲线运动,并实时测量、反馈轧辊磨削时的主要磨削参数,提出了基于模糊控制理论的在线轧辊辊型测量方法,实现了智能测量系统的检测在轧辊磨削中的应用。在线测量数据采集与磨削加工同步,其位置先于磨削系统。进入正常测量加工工序时,在线测量系统把磨削系统对轧辊即将加工的轧辊表面粗糙度、轧辊辊型等相关数据传输给模糊控制系统,模糊控制系统将测量数据与理想模型进行对比、计算。最后输出轧辊磨削的最优磨削速度和磨削力,从而获得理想的轧辊辊型和轧辊表面粗糙度,实现在线测量、自适应控制。
[Abstract]:The traditional effective method to improve the grinding accuracy of roller surface and roll profile is to focus on the change of grinding wheel and workpiece during grinding process, mainly considering the weakest position of axial stiffness of workpiece, and designing the center frame to improve the rigidity of workpiece. Grinding chatter suppression, error compensation, mechanism of machine tool variable speed grinding and variable speed grinding are adopted. On the basis of analyzing the mechanism of variable speed grinding, the relationship between variable speed grinding and grinding chatter suppression and grinding precision, the roll shape structure is put forward according to the material of roller. The grinding characteristics of the grinding wheel itself and the specific grinding process parameters are reasonably determined. Based on the direct self-adaptive fuzzy control, the rolling roll variable speed micro-feed grinding technology strategy is proposed. On the basis of fully considering the variation of roll grinding machine and roll system along the roll axial stiffness and controlling roll deformation in grinding, a new adaptive control strategy of variable speed grinding micro-feed optimization based on adaptive fuzzy control is put forward. In order to improve the precision of roller grinding, a new breakthrough and effective solution is put forward. At present, the application of on-line measurement technology has become mature, and has been widely used in the field of mechanical processing, which provides real-time processing parameters for machining, and to improve processing efficiency, protect workpieces and machine tools, Reducing the machining error provides a guarantee. Based on the support of advanced technology, the importance of roller grinding detection in steel sheet production and the limitation of current roller profile and surface roughness measurement methods are analyzed. A roll profile on-line measuring instrument is designed. The synthetic curve motion of roller grinding is overcome, and the main grinding parameters of roller grinding are measured in real time, and the on-line roller profile measurement method based on fuzzy control theory is proposed. The application of intelligent measuring system in roller grinding is realized. Online measurement data acquisition and grinding process synchronization, its position before the grinding system. When entering the normal measuring and processing process, the on-line measuring system transmits the relevant data of grinding system to the fuzzy control system, such as the surface roughness of the roller, the roll profile and so on, which are about to be processed by the grinding system. The fuzzy control system compares the measured data with the ideal model and calculates. Finally, the optimal grinding speed and the grinding force are outputted, thus the ideal roll profile and surface roughness are obtained, and the on-line measurement and adaptive control are realized.
【学位授予单位】：内蒙古工业大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TG580.6

【参考文献】