【作者】 张磊；

【导师】 李素玲；

【作者基本信息】 山东理工大学 ， 检测技术与自动化装置， 2011， 硕士

【摘要】 在国内汽车工业快速发展的今天,汽车变截面板簧的应用越来越多,需求量也日益增多。但由于国内生产工艺的限制,多采用传统的轧机对板簧多次加热反复轧制,多次修边切整,导致板簧的生产精度不高,易破坏板簧的金属的组织性能,产量较高,生产成本较高,效率低下。针对这一情况,本课题采用了一类新型的一次成形板簧轧机能够利用变值成形技术生产变截面的板簧,但是必须要求轧机能够稳定控制多个轧辊的协调运动,使坯料经过一次轧制后得到理想的变截面形状的板簧。本文的主要内容包括：一、本文对工件变值成形工艺进行了分析,研究了变值成形工艺设备的理论要求,根据实际生产设备与技术提出单道次一次成形板簧变值成形工艺,并采用了现在比较新的V-H单道次变值成形设备。二、对该轧机中控制部分所采用的电液伺服控制系统各个元件进行设计,设计了一次成形板簧轧机电液伺服系统的原理图并建立了数学模型,根据实际应用的特点,对该数学模型进行了简化。三、针对V-H变值成形轧机的V轧部分两轧辊需要得到协调运动控制的问题,采用了液压同步控制技术。在分析同等方式、主从方式和耦合方式的优缺点的基础上选用主从式同步控制方式控制V轧系统运动。并分别建立了主从式的和同等式的同步控制系统模型图,进了相应的仿真实验验证。四、针对板簧变值成形电液伺服控制系统的结构特点,分别采用传统PID控制、常规模糊控制和模糊PID对液压伺服系统进行控制与仿真实验,比较三种控制方法的优缺点,最后采用模糊PID算法来智能控制板簧变值成形电液伺服系统；实验仿真结果表明,V-H单道次一次成形工艺的理论可行性,可以满足控制精度的要求。模糊PID控制策略能够有效地控制电液伺服系统的运行,比PID控制和单纯的模糊控制更具有抗干扰能力、稳态性能好、跟随性好。采用主从同步控制方式能有效控制V轧两立辊协调同步运动,有效减少同步误差,提高同步跟随性能。基于模糊PID的板簧变值成形电液伺服控制系统的研究具有较大的理论价值和实际指导意义,可以提高变截面板簧的生产效率和生产质量,增强板簧产品在同行业中的竞争力。更多还原

【Abstract】 With the auto industry fast developing today in the domestic, the application of leaf-spring in car cross-section are more and more increasing demand. But because the restriction of the domestic production technology, more traditional mill use heated to leaf-spring rolling repeatedly, and trimming cut the whole many times, leading to the production and precision of leaf-spring are low, easy to destroy the organization performance of metal leaf-spring, so the methods is not high yield, production cost is high and low efficiency. In view of this situation, this subject adopts a new type of a forming leaf-spring mill can use in the produce of variable value variable cross-section of the forming technology but must demand the leaf-spring rolling rolls to stabilize motion coordination control many blank after a rolling, to get ideal cross-section shapes of leaf-spring.The main content of this article include:One, this paper studies on the forming process variable value and the forming process equipment variable value according to the actual requirements, studies the theory of production equipment and technology single-channel times, then put forward a forming leaf-spring variable value forming process, and used the now relatively new V-H single-channel times variable value forming equipment.Second, in part of designing the electro-hydraulic servo control system of the mill, design each component of the forming leaf-spring mill electro-hydraulic servo system diagram and established the mathematical model, simplifies the application of the mathematical model according to the characteristics of practical.Three, aimed at the problems of V-H variable value of mill V rolling forming part two roll need be controlled coordinated movement, using a hydraulic synchronous control technology. A the same times, analysis the advantages and disadvantages of. In the same mode, master-slave mode and the coupling mode on the basis of synchronous control subordinate type selection the better mode to control V rolling system movement. And the subordinate types are established with synchronous control equation with diagrams, into the system model corresponding simulation experiment.Four, aimed at leaf-spring variable value forming electro-hydraulic servo control system used to the characteristic of structure, the traditional PID control, conventional fuzzy control and fuzzy PID control of hydraulic servo system with simulation experiment respectively, compare the advantages and disadvantages of three control methods, then using fuzzy PID algorithm to intelligent control the leaf-spring variable value forming electro-hydraulic servo system;Simulation results show that V-H single-channel times once forming process theory, can satisfy the feasibility of the control accuracy requirements. Fuzzy PID control strategy can effectively control electro-hydraulic servo system, the operation result better than PID control and simple fuzzy control, and it has more anti-interference ability and steady-state performance, following is good. Adopt master-slave synchronous control way can effectively control V rolling roll coordination greatly, effectively reduce the synchronous movement, improve timed with synchronous error performance. Based on fuzzy PID variable value of leaf-spring forming electro-hydraulic servo control system has a greater theory value and practical significance, can improve the production efficiency varingarea leaf-spring production and quality, enhance the competitiveness of products in the leaf-spring industry.更多还原