Introduction:

In response to the increasing demand for electronic products, manual soldering methods using soldering iron tools for PCB board pin solder joints are becoming obsolete. This article explores the transition to automated soldering solutions to meet market requirements in terms of production efficiency and product quality.Historical Development:

1. Emergence of Automatic Welding Machines: As electronic production scaled up, semi-automatic and automatic mass soldering equipment, and fully automatic welding machines were introduced. Fully automatic welding machines originated in Japan, initially serving as the primary production equipment for black and white/color TV sets.Introduction to China: In the 1980s, these technologies were introduced to China, including dip soldering machines and single wave soldering machines. The mid-1980s witnessed a rapid development of SMT technology, leading to the appearance of double wave soldering machines.Flow Soldering Technology: Dip soldering, single-wave soldering, and double-wave soldering all fall under flow soldering. This technology involves the relative movement of molten liquid solder and the workpiece, achieving wetting for soldering purposes.Advantages of Automatic Flow Welding: Compared to manual patch welding, automatic flow welding technology offers advantages such as power savings, reduced manpower, improved efficiency, cost reduction, enhanced appearance quality and reliability, and the ability to overcome human factors.Versatility of Automatic Soldering Machines: These machines, when used with various tooling and fixtures, effectively meet diverse welding requirements for processing circuit PCBs and parts.

SMT Patch Manual Welding:

1. Skilled Manual Welding Process: Manual welding allows experienced welders to adjust the welding torch’s position, posture, and walking speed based on visual observations. This process demands a certain level of technical expertise.Limitations of Manual Welding: Manual patch welding is constrained by the operator’s skill level, resulting in uneven welding skills and speed. Emotional fluctuations and external factors affect welding quality and daily output.

Advantages of Manual Placement:

1. Flexibility: Manual placement is more flexible and suitable for small batch sample placement, with a relatively short completion time.No Tray Loading: Loose materials, readily available on the market, eliminate the need for tray loading.No Throwing Situations: Unlike high-speed placement machines, manual placement does not involve throwing situations or additional material preparation, engineering costs, or start-up costs.Quality Inspection: At the end of manual welding, a magnifying glass is used to inspect all products.Visual Alignment System for BGA Welding: Manual welding employs a visual alignment system for BGA welding, ensuring high-quality BGA soldering.

Conclusion: This article delves into the historical evolution of SMT welding technologies, highlighting the shift from manual methods to automated solutions. The advantages and limitations of both automated and manual approaches are discussed, providing insights into their respective roles in electronic production.