SMT回流焊工艺分析及其温控技术的实现  

SMT Reflow Process Analysis and Realization of Temperature Control Technology

作　　者：胡毓晓 张昆 仲文艳 杨雷 胡海波 HU Yuxiao;ZHANG Kun;ZHONG Wenyan;YANG Lei;HU Haibo(Jiangsu Antarctic Star New Energy Technology Co.,Ltd.,Nanjing 210038)

机构地区：[1]江苏南极星新能源技术股份有限公司,南京210038

出　　处：《现代制造技术与装备》2024年第5期155-157,共3页Modern Manufacturing Technology and Equipment

摘　　要：随着电子器件微型化及表面贴装技术(Surface Mounted Technology,SMT)的发展,热风回流焊机在电子制造业中的应用日益广泛。然而,在回流焊过程中,由于被控参数的非线性、不确定性等因素,传统的比例-积分-微分(Proportion Integral Differential,PID)控制器难以取得满意的控制效果。针对SMT回流焊工艺的特点,分析温控技术在回流焊过程中的重要性,并探讨温控技术的实现方法。设计一整套多中央处理器(Central Processing Unit,CPU)嵌入式硬件系统,并使用改进PID控制算法控制热风回流焊机。针对回流焊机温区多、人工参数整定效率低的问题,研究PID参数自整定的方法。在改进PID控制算法的基础上,提出上位机插值模糊PID控制算法。所提出的温控技术能够有效提升回流焊质量,满足现代电子制造业的高精度要求。With the development of miniaturization of electronic devices and Surface Mounted Technology(SMT),hot air reflow welding machine is widely used in electronic manufacturing industry.However,in reflow welding process,the traditional Proportion Integral Differential(PID)controller is difficult to achieve satisfactory control effect because of the nonlinearity and uncertainty of the controlled parameters.According to the characteristics of SMT reflow soldering process,the importance of temperature control technology in reflow soldering process is analyzed,and the realization method of temperature control technology is discussed.A whole set of embedded hardware system with Central Processing Unit(CPU)is designed,and on this basis,the computer control of hot air reflow welding machine is implemented with improved PID control algorithm.Aiming at the problems of many temperature zones and low efficiency of manual parameter setting of reflow welding machine,the PID parameter self-tuning method was studied.On the basis of improved PID control algorithm,the interpolating fuzzy PID control algorithm of upper computer is proposed.The temperature control technology can effectively improve the quality of reflow welding and meet the high precision requirements of modern electronic manufacturing industry.

关 键 词：表面贴装技术(SMT)回流焊 温控技术 比例-积分-微分(PID)控制 

分 类 号：TN405[电子电信—微电子学与固体电子学]