PCBA Tech - SMT machine paste and manual welding comparison

1. SMT machine welding

With the mass production of electronic products, the method of manually soldering the pin solder joints on the PCB board with a soldering iron tool can no longer meet the requirements of the PCB market, production efficiency and product quality. As a result, semi-automatic/automatic mass soldering equipment and fully automatic welding machines were gradually invented. Fully automatic welding machines first appeared in Japan as the main production equipment for black and white/color TV sets. Introduced into China in the 1980s, there have been dip soldering machines, single wave soldering machines and so on. In the mid-1980s, the SMT technology of starting and inserting mixed assembly developed rapidly, and double wave soldering machines appeared again. From the perspective of PCB soldering technology, these dip soldering, single-wave soldering, double-wave soldering, etc. are all flow soldering (Flow Soldering), all of which are molten liquid solder and the workpiece to be soldered relative to the movement, and make it wet to achieve soldering .

Compared with manual welding technology, fully automatic flow welding technology obviously has the following advantages: save power, save manpower, improve efficiency, reduce costs, improve appearance quality and reliability, overcome human influence factors, and can complete tasks that cannot be done manually .

The automatic soldering machine is used with various tooling and fixtures, which can effectively meet your different welding requirements for the processed circuit PCB and parts.

As a leader in the field of SMT express delivery in China, Yingchuang is committed to providing customers with R&D proofing, small and medium batch SMT patch processing, and the rapid delivery capability is the industry's first. Adopt the industry-leading multi-function placement machine, ten temperature zone reflow oven configuration, equipped with wave soldering, BGA rework station, AOI, X-RAY testing equipment, 5 existing SMT patch production lines, 2 post-soldering, assembly, and testing A full set of production lines.

2. The current bottleneck status and restrictive factors of manual welding

1. Cost of welding accessories: Welding workers’ skills and emotions are more or less unable to estimate the accessories used during welding. They can be collected from the warehouse as much as they are used. The administrator cannot quantify the daily use of welding accessories, that is, the welding accessories. Cost is a vague concept, and there is no quantification of the cost accounting for the production of products. It is an unexplainable item for customers and own costs. This is the third bottleneck of manual welding.

2. Welding process quality: The manual welding process is limited by the welder's technological level. The welding skills and speed of welders are uneven, and emotional fluctuations are affected by certain factors. The welding quality and output of products every day are affected by it. Impact, this is the second bottleneck of manual welding

3. Welding efficiency: Affected by the skill of the welder, the efficiency of product welding every day cannot be quantified. How many products the factory can produce every day, and whether the product quality is good or not. Under what conditions is the so-called efficiency achieved? We understand that the purpose of welding is to obtain reliable solder joints. Therefore, the welding efficiency we require should be based on ensuring that reliable solder joints are obtained; that is to say, while we are performing high-efficiency welding, we should avoid taking a higher rejection rate as the price.

4. PCB welders: as we all know, on the one hand, welding processing requires welders to have proficient operating skills, rich practical experience, and stable welding level; on the other hand, welding is a kind of poor working conditions, a lot of smoke and dust, and large heat radiation., High-risk work. Welding is different from other industrial processing processes. During manual welding, experienced welders can adjust the position, posture and walking speed of the welding gun according to the actual weld position observed by the eyes to adapt to the welding point and welding track. Therefore, the job of a PCB welder is a job with a certain technical content. For the factory, it is necessary to recruit a skilled welder. The current worker mentality and the factory’s cost accounting for employees become a positive and negative opposite. This is a bottleneck for manual welding.