【作者】 董添；

【导师】 冀群心；

【作者基本信息】 吉林大学 ， 控制理论与控制工程， 2011， 硕士

【摘要】 发动机曲轴箱体轴承座裂解机床电控系统的设计和裂解速度的研究上世纪90年代,裂解工艺的出现打破了以往加工的工艺常规,此项技术的应用,率先使发动机连杆螺栓孔整体加工工艺得到极大的简化。进而使裂解技术成为最有创造力、影响力和竞争力的加工新技术。随着连杆裂解加工工艺的日趋成熟,有很多中外专家也开始逐渐尝试将裂解技术应用到汽车发动机曲轴箱体轴承座的加工领域中。决定一个国家汽车制造行业水平的高与低,往往看重的是其制造发动机的能力,发动机曲轴箱体轴承座的制造水平对于发动机的性能来讲至关重要,所以谁能将裂解加工技术应用到发动机曲轴箱体轴承座的加工工艺上,谁将掌握未来汽车工业制造上的主动权。本文对发动机曲轴箱体轴承座裂解机床进行了全面而又细致的分析,设计了由PLC构成的电控系统,并对裂解速度的检测系统进行了深入研究。本文主要工作如下:1.结合裂解机床的液压系统的相关要求及其它相关的工艺参数,以三菱Q系列PLC为核心,设计并实现了控制系统。2.依照发动机曲轴箱体轴承座裂解机床主机动作流程的要求和裂解机床的设计要求及工艺参数设计了裂解机床的主电路、控制电路、PLC和外部接口电路、功放电路、接近开关检测电路等。3.采用了高速计数模块作为采集系统,增量式编码器为传感器的裂解速度检测系统。通过裂解工艺相关参数,对高速计数器及编码器进行了选型。并设计了人机界面达到对裂解速度过程的实时显示。4.对PID控制在发动机曲轴箱体轴承座裂解机床裂解主机速度控制系统的应用进行了研究,通过自整定参数寻优PID控制方法及单神经元自适应PID控制方法分别对PID控制器的参数采用一定规则进行优化,并获得了满意的控制效果。更多还原

【Abstract】 Research on the Control System and Speed for Fracture Splitting Machine tool of Engine Crankcase Bearing BracketIn 90’s of last century, the emergence of cracking process brings a breakthrough to the previous conventional processing technology, which also greatly simplifies the overall process of producing the engine connecting rod bolt hole. Pyrolysis technology has been to be the most creative, influential and the most competitive, new technology. As the connecting rod fracture splitting technology matures, researchers and experts begin to attempt in adopting cracking technology in automotive engine box bearing the processing field. The nation’s ability in engine manufacturing determines the level of its automobile manufacturing industry; it is the same that the engine crankshaft box bearing is a most determinative factor for the performance of the engine, which means the one who masters the processing technology applied to the pyrolysis engine box bearing will lead the future automotive manufacturing.In this paper, cracking the engine crankshaft bearing machine tool box is presented comprehensively and with detailed analysis on the hydraulic system, PLC control system and designing a cracking speed detection system. The dissertation is structured as follows:1.Introduction to the engine crankshaft bearing box cracking machine hydraulic system. Preliminary selection of the computer control system based on cracking machine requirements relating hydraulic parameters and other relevant parameters. Mitsubishi Q series Q series PLC is selected.2.Design of the main circuit is based on the comprehensive analysis of the machine host working process, design requirements of cracking machine and process parameters of the cracking machine. According to the engine crankshaft bearing box cracking machine control unit requirement to control the splitting machine system on/off, hydro-engine on/off, lubrication system on/off, and overload protection, on which the design of the pyrolysis machine control circuit is based.3.Cracking speed detection solution is made up of a high-speed counter module acquisition system, inductive the TR2 with rack and pinion encoder. Brief introduction on high-speed counter and the TR2 with rack and pinion encoder, based on which selection was carried out. Through high-speed counter compiled, in accordance with the algorithm designed to the host, the instantaneous speed in the cracking three stages is figured out.4.Hence a velocity detecting and controlling system of the comprehensive analysis of the machine host based on this microcomputer is designed. Simulations and experiments research indicate that the algorithms as parameters self-tuning optimizing PID and single neural element adapting PID, applying to the real time velocity control system yield quickly responsibility and great stability of the system.更多还原