关键词: 表面组装技术, 焊点质量, 虚拟成形, 图像获取, 检测与控制

Abstract: The principles of the Surface Mount Technology (SMT) solder joints quality assurance technology based on the solder joints shape theory and the solder joints virtual evolving technology could be described as following： the practical solder joint shape was obtained by image acquisition and compared with the reasonable solder joint shape obtained by solder joints virtual evolution technology firstly. Then based on the comparison, both the types and the causes of the practical solder joints assembly fault could be acquired by intelligent detection. Furthermore, feedback information used to adjust assembly process parameters was formed in order to adjust and control correlative assembly process. As a result, the assembly quality of the solder joints would be improved and guaranteed. Based on expatiation of the principles of the SMT solder joints quality assurance technology, its implementation method and steps were introduced with practical examples. Some key technologies, including image acquisition and processing, solder joints quality analysis and evaluation were also discussed. Some results were given as examples to verify feasibility of this technology.

Key words: surface mount technology, solder joints quality, virtual evolving, image acquisition, detection and control