基于PLC和触摸屏技术的压铸模型芯针冷却控制系统  

Control System of Core Pin Cooling in Die-casting Mould Based on PLC and Touch Screen Technology

作　　者：吴克亦[1] 万里[1] 邹广[1] 吴树森[1] 黄志垣 张百在 

机构地区：[1]华中科技大学材料成形与模具技术国家重点实验室 [2]广东鸿图科技股份有限公司

出　　处：《特种铸造及有色合金》2013年第4期337-341,共5页Special Casting & Nonferrous Alloys

摘　　要：压铸模细小型芯针的工作温度是压铸模温度控制中的一大难点。针对压铸件小尺寸孔洞成形质量差,型芯针容易变形、粘模、断裂等问题,开发了基于PLC和触摸屏技术的型芯针冷却控制系统。本系统采用高压冷却水结合吹压缩空气的冷却方法控制型芯针的温度,且冷却水独立封闭循环使用。系统硬件设计采用了"PLC+触摸屏"控制方案,以PLC作为上位机,结合嵌入式触摸屏和A/D转换模块组成整个系统的核心;系统软件设计应用触摸屏组态界面并结合PLC控制程序。生产应用表明,采用本系统后,型芯针温度波动小,使用寿命大幅延长;铸件质量提高,废品率降至2%以下。同时系统界面直观、简洁;参数输入、查询显示方便;控制动作稳定可靠。The temperature of thin-fine core pin in die-casting mold is a major difficulty in the die-casting mold temperature control, which has significant effects on internal quality of the casting holes and service life of core pin. In order to solve such problems as the poor quality of small holes of die casting and deformation, soldering and fracture of thin-fine core pin, the control system of core pin cooling based on PLC and touch screen technology has been developed. High pressure cooling water combined with air blowing was used to decrease the temperature of the core pin in the system. The cooling water has the characteristics of independent, closed and circular. The hardware system was designed through the 'PLC + touch screen' technology, in which PLC was the host computer, embedded touch screen combined with A/D conversion module as the core of whole system. The software system was composed of PLC control program and configuration system. Production and application results show that core pin temperature exhibits a lower fluctuation and service life is increased greatly after using the system. Meanwhile, casting quality is improved and the reject rate is reduced to below 2%. The advantages of the system include convenience for display, visualized, simple interface and stable and reliable controlling.

关 键 词：压铸模 型芯针温度 冷却 PLC 触摸屏 

分 类 号：TG249.2[金属学及工艺—铸造] O242[理学—计算数学]