How to calculate the usage amount of lead-free solder paste and the common practices?

Nowadays, circuit boards have become electronic products that many people need. Let's talk about how much lead-free solder paste is generally used in circuit boards? How many bottles of solder paste can a factory production line use in a day? Calculated this way, how many jin of solder paste are needed in a month? These issues, I think, are a source of concern for many engineers in the production workshop. So, how can we calculate these quantities? Below, JJY Solder Paste Manufacturer can provide an answer:

How to accurately estimate the amount of lead-free solder paste used

1Estimate using the opening area of the steel plate

SMTIf the manufacturer uses the opening area of the steel plate for calculation, a large error will occur. The errors therein include the amount of lead-free solder paste wasted during the cleaning of the instrument, as well as the entire amountSMTThe amount of scrap loss in the welding process, so when calculating using the opening area of the steel plate, lead-free solder paste manufacturers usually increase it0.2For the errors, calculate the quantities of solder paste wasted during the production process together. The common approach to calculating the usage of lead-free solder paste based on the working area of steel plates is as follows: FirstlySMTThe manufacturer needs to ask the steel plate manufacturer to provide itSMTThe opening area of the steel plate used for welding is determined by the thickness of the steel plate. The manufacturer needs to calculate the volume of solder paste that can be accommodated after the opening, and then calculate the amount of solder paste used based on the relationship between density and volume=Opening area*The thickness of openings in steel plates*Solder paste density*1.2. The amount calculated by this method is very precise, down to the amount of lead-free solder paste required for each circuit board.

2Estimate according to the production rules

Although the above method can be used for very precise estimation, in the actual production process, eachSMTThe welding processes of the manufacturers are different. The operation habits of workers in lead-free solder paste manufacturers are different.SMTDifferent cleaning habits of manufacturers will lead to differences in the quantity used in the actual usage process. We can make estimations through production laws, and the specific operation courses can be statistically analyzedSMTThe number of solder joints on the circuit boards soldered by the manufacturer within half a year, and then the number of lead-free solder pastes used in these six months divided by the number of solder joints, will yield the resultSMTThe actual amount of solder paste used by the manufacturer for each solder joint on the circuit board during the soldering process. This method can be comprehensively consideredSMTThe welding habits of the manufacturer The operating habits of production line workers AndSMTThe cleaning habits of the manufacturer. Estimation based on production rules can incorporate the amount of lead-free solder paste lost during the soldering process into the amount of solder paste used for each solder joint. Estimation based on growth rules will significantly improve the accuracy of the estimation, which can beSMTThe manufacturer provides a relatively accurate basis when making an estimation.

To master the relevant solder pasteLead-free solder pasteWe warmly welcome all friends to consult Shenzhen JJY Industrial Production High-tech Co., Ltd. for problems related to solder paste and other soldering methods. Let's learn and grow together!