【作者】 李祥；

【导师】 程洁；

【作者基本信息】 东南大学 ， 机械工程， 2018， 硕士

【摘要】 铸造过程难以直接观察,一般是根据工艺工程师的经验来确定初始铸造工艺,采用试浇法改进工艺,浇注后才能确定铸造工艺的合理性;铸造过程仿真结果的正确性难以验证,没有实现铸造生产数据的实时采集。本文为解决以上问题,提出了一种在铸造过程中进行温度数据的采集,用实验数据验证仿真结果来证明工艺合理性的通用型方法,并用实例加以验证。具体研究成果如下:利用计算机仿真方法对铸件的铸造生产过程进行了模拟。以一个机床床身铸件实例,利用ProCAST仿真软件对其铸造过程的充型阶段、凝固阶段分别进行讨论,并对其缺陷分布情况进行分析。提出了浇冒系统的改进,并对其工艺参数作适当优化。最后将原工艺和改进工艺的凝固过程、缺陷分布分别作了对比,验证其工艺改进的合理性。设计并开发了一套面向铸造生产过程的通用型温度数据采集系统的硬件和软件。针对铸造生产的温度采集系统的特殊需求,提出了该温度采集系统的框架结构和功能模块。对系统的上位机显示端设计开发,完成了下位机检测端关键组件的选型,并完成了上位机和下位机端的通信及其通信协议的制定。研究了用于铸造生产领域的传感器在铸造型腔中的布置方法。最后以机床床身铸件的实际生产过程为例,对铸件生产过程的重要部位进行温度监测和数据采集,并重点分析了各部位的凝固过程温度变化,与仿真结果作对比,验证了仿真改进工艺的浇冒系统和工艺参数的合理性,证明了该改进工艺的可行性。更多还原

【Abstract】 The traditional casting process is difficult to observe directly.Generally,the casting process is determined based on the experience of process designers.Testing method is used to improve casting process and the rationality of casting process can only be evaluated after the process.The real-time data collection of foundry production is not realized,so the correctness of the simulation results is difficult to verify.In order to solve the above problems,the general method of collecting temperature data in casting process and verifying the simulation results with experimental data to prove the process rationality was put forward.The specific research results are as follows:The casting process was simulated by computer simulation technology.Taking a machine tool bed as an example,the filling stage and solidification stage of casting process were discussed with software ProCAST and the distribution of the defects was also analyzed.The improvement of gating system and riser was put forward,and its technological parameters were properly optimized.Finally,the solidification process and defect distribution of the original process and the improved process were contrasted respectively,and the rationality of the process improvement was verified.The hardware and software of the universal temperature data acquisition system for foundry production process were designed and developed.Based on the special demand of temperature acquisition system in foundry production,the frame and function module of the system were put forward.The upper and lower computer terminals of the system were designed and developed respectively,and their communication and communication protocols were completed.The layout method of sensors used in casting cavity was explored.Finally,taking the actual production process of machine tool bed as an example,temperature monitoring and data acquisition for important parts of casting in production process were carried out.The temperature change during solidification process was analyzed and compared with the simulation results.The rationality of gating system and process parameters improved by simulation was verified and feasibility of the improved process was proved.更多还原