Wave welding machine is a common machine and equipment in the electronic device manufacturing industry. Generally speaking, it is mainly for the plug-in electronic components inserted in the electronic pcb circuit board after soldering. The wave soldering machine with liquid filler metal is needed in the process of double wave soldering of printed board and single wave soldering of SMC circuit board. Crest welding specifically refers to the molten soft brazing solder (lead tin alloy), the electric pump or electromagnetic pump jet into the design of the solder crest, can also be produced according to the solder pool filled with nitrogen, so that the printed board equipped with electronic devices through the solder crest, Maintain the flexible fiber welding of mechanical equipment and electrical connections between the welding ends of electronic devices or pins and printed board pads.
Wave crest welding (wave crest welder) is specifically used as the traditional through-hole insertion of printed circuit board electrical processing technology, and its surface assembly and through-hole insertion of electronic devices mixed processing technology. Surface assembled electronic devices that can be used in the wave soldering process include rectangular frame and cylindrical chip components, SOTs and smaller Sops. At present, the common key in China are these types: cabinet wave welding machine, double wave welding machine, small wave welding machine and lead-free wave welding machine. Its production process is: insert components into opposite component holes → pre-coating flux → pre-drying (temperature 90-1000C, length 1-1.2m) → wave soldering (220-2400C) → removal of excess plug-in feet → inspection.
When the printed board for dispensing (or packaging printing) adhesive, mounting, adhesive drying and inserting through-hole electronic devices is operated forward from the channel end of the wave welding machine along with the conveyor belt, according to the flux polyurethane foaming (or sprayer) slot, the pad on the bottom surface of the printed board, all the ground terminals of electronic devices and the surface of the pin are evenly coated with a thin layer of flux. With the conveyor belt operation, the printed board into the heating area, the organic solvent in the flux is volatilized, the resin and surface active agent in the flux began to decompose and active, the printed board welding pad, electronic device grounding terminal and foot surface of the air oxide film and other pollutants are removed; At the same time, printed boards and electronic devices get sufficient preheating. The printed board continues to move forward, with the bottom edge of the printed board first passing through the first wave of molten solder. The first solder wave is a turbulent (vibrating or turbulent) wave that hits all pads, electronic ends and pins on the underside of the printed board. The molten solder wets and diffuses on the passivation of the stainless steel which has been purified by flux. Later, the bottom edge of the printed board uses the next molten solder wave, the second solder wave is the smooth wave, the smooth wave separates the bridge between the pin and the welding end, and removes the pull tip (icicle) welding defects. When the printed board continues to run forward away from the second solder wave, natural cooling produces solder joints, that is, complete welding.
Wave welding machine for electronic device manufacturing enterprises is indispensable machinery and equipment, the current sales market wave welding machine manufacturers are very much, but the regular manufacturers are few, buy good quality after-sales service to ensure the wave welding machine or to find a large wave welding machine manufacturers. Chengyuan Automation is your best choice.
Post time: Mar-23-2023