Double wave soldering process

Double wave soldering process

Application range of double wave soldering.Usually single wave soldering can not be competent for the welding of double-sided sticker printed circuit board.It will produce a lot of leakage welding and bridge connection.In order to meet the new requirements, dual-wave soldering has emerged as the times require

The basic working principle of double wave soldering is that there are two peaks in the front and back,the first one is narrower,and the peak ends are three to five rows of small peak heads.In this case,the gas is removed and the surface tension is weakened under the action of a turbulent wave with constant rapid flow,thus,all the surfaces to be welded are well wetted.The latter wave peak is a wide flat wave with two directions.The flow of solder is flat and slow,which can remove excess solder and eliminate the undesirable phenomena of bridge connection

Welding process Introduction According to the secondary welding process,there are four different process combinations

Dip welding

Shear foot immersion welding.The cost of this technology is relatively low,and it is applied in small electronic enterprises.It is suitable for the welding process with more product types,but less product quantity.The welding quality of the products is not high, and the welding quality of the products is not ideal.

Bleed Shear Foot Wave Soldering.This process is suitable for the welding process that requires less welding.

Wave Soldering-+ Shear Foot-Wave Soldering.This technology is suitable for the production line of manual plug-in components.

This is also a way for large electronic manufacturing enterprises to adopt,which is more suitable for the explosion of circuit boards on both sides,make a good business from the nest to diffuse the welding machine with a vibration or ultrasonic,so that the solder can penetrate into the Ye into the internal.Welding quality analysis and welding

Welding quality analysis of the causes of solder joint virtual welding and the harm of virtual welding,solder joint virtual welding mainly have the following several reasons: 1 is subject to oxidation of the solder pin;

The surface of the weldment pin has dirt;

The quality of the solder is poor;

The welding quality is not good,and the amount of soldering tin is too little;

electric iron temperature is too low or too high,the welding time is too long or too short;

solder shake before solidification.Virtual welding brings great hidden trouble to product commissioning and product maintenance of the factory.Some electronic products are not exposed for a time,but because of the large contact resistance between the welding parts and the solder,the temperature increases continuously in the long-term work,make solder joints solder crack,mechanical vibration will cause poor contact