闽江学院学报

针对砂型铸造配件在传统粘土砂造型机下生产铸件无法根据不同动作的需求进行适配调速，导致机械能耗大、生产效率低下、分型面紧实度不足的问题，设计了以可编程逻辑控制器为控制平台的上下箱双射砂造型机全自动控制系统。结合工作流程对造型设备总体方案进行设计，该设备结构主要由砂型合模压实系统、推型系统以及砂筒射砂系统组成。在控制系统硬件方面，确立控制系统总体方案，选择PLC型号、设计电路接线图和I/O分配表；在控制系统软件方面，实现通过触摸屏手动调速作业速度和实时检测运行状态的自动调速作业模式。试验结果表明，新型造型机运行平稳，分型面紧实度测量值达80以上，工艺成品率为96.5%,液压站能耗较原机械降低12.3%,造型速度可达37 s·型^-1,为传统砂型铸造行业的现代化转型提供了可行的技术路径。

In order to solve the problems that the casting parts under the traditional clay sand molding machine can not be adjusted according to the requirements of different actions, which leads to high mechanical energy consumption, low production efficiency and insufficient tightness of parting surface, a fully automatic control system of the upper and lower box double-shot sand molding machine based on PLC is designed.The overall plan of the molding equipment is designed in conjunction with the workflow.The equipment structure mainly consists of a sand mold clamping and compacting system, a mold pushing system,and a sand barrel shooting system.In terms of control system hardware,the overall con-trol system plan is established,the PLC model is selected,and the circuit wiring diagram and I/O allo-cation table are designed.In terms of control system software,the manual speed adjustment of the oper-ating speed through the touch screen and the automatic speed adjustment operation mode with real-timedetection of the operating status are realized.The test results show that the new molding machine runssmoothly,the compactness of the parting surface is over 80,the process yield is 96.5%,the energy con-sumption of the hydraulic station is 12.3% lower than that of the original machine,and the moldingspeed can reach 37 s·mold^-1,providing a feasible technical path for the modernization transformationof the traditional sand casting industry.