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PCBA Tech
SMT machine paste and manual welding comparison
PCBA Tech
SMT machine paste and manual welding comparison

SMT machine paste and manual welding comparison

2021-11-11
View:36
Author:Downs

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

1. Welders: As we all know, welding requires that welders have proficient operating skills, rich practical experience, and stable welding level; 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 welder’s job is a job with a certain technical content. For SMT factories, 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.

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. Mood fluctuations are affected by certain factors. The welding quality and output of products are affected every day. Impact, this is the second bottleneck of manual welding.

pcb board

3. Cost of welding accessories: Welding workers’ skills and emotions are more or less unable to estimate the accessories used in 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.

  4. 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 the premise of ensuring reliable solder joints; that is, we are While performing high-efficiency welding, one should avoid paying the price of a higher rejection rate.

   2. 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 market requirements, 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. In terms of soldering technology, these dip soldering, single-wave soldering, double-wave soldering, etc. are all flow soldering (Flow Soldering), where the molten liquid solder and the workpiece to be welded move relative to each other 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 the different welding requirements for the processed circuit PCB and parts.