SMT sticks a circumfluence in treatment to solder the critical process of machine

As the fervent growth of electron of car of new energy resources, drove include to charge the demand of the car electron equipment such as picket increases, also drove SMT to stick a growth that machines demand, be based on the requirement of tall precision of car electron equipment, stick a quality to SMT also rising ceaselessly, and SMT sticks a process in, each link is crucial, cannot have any accident, small today make up the circumfluence in learning SMT to stick a treatment together with everybody to solder the introduction of machine and critical process. Circumfluence solders equipment is the crucial equipment that SMT assembles a process, the solder drop quality that PCBA solders depends on completely circumfluence solders the setting of the function of equipment and temperature curve. Circumfluence solders the technology experienced board type radiate to heat, quartz is infra-red the canal heats, infra-red sirocco heats, compulsive sirocco heats, compulsive sirocco heats the development process that adds the different form such as nitrogen protection. The requirement of the cooling process that circumfluence solders promotes, also solder to circumfluence stimulative action reachs since the development of equipment cooling zone, cooling zone is cooled by room temperature nature, wind is cold the water-cooling system to to suit to solder without lead design. Circumfluence solders because equipment produces craft to control the promotion of the requirement such as the uniformity of temperature of accuracy, lukewarm area, deferent speed to temperature. And by 3 lukewarm areas development went 5 lukewarm areas, 6 lukewarm areas, 7 lukewarm areas, 8 lukewarm areas, 10 lukewarm areas to wait to solder differently system. Circumfluence solders facility construction sketch map one, circumfluence solders the crucial parameter of equipment 1, the amount of lukewarm area, length and width; 2, the symmetry of fluctuation heater; 3, the uniformity that the temperature inside lukewarm area distributings; 4, lukewarm interval is deferent speed pilot independent character; 5, the protection of inert gase solders function; 6, the gradient control that cooling zone temperature drops; 7, circumfluence solders heater is highest temperature; 8, circumfluence solders heater temperature controls precision; 2, circumfluence welder the critical process parameter of foreword 1, solder temperature curve: The basis is the over all dimension of PCB, multilayer ply number and ply, solder the cupreous level on the bulk of yuan of parts of an apparatus and density, PCB is accumulated and the element such as ply, those who check solder point point is actual solder temperature comes set temperature curve. 2, undertake controlling to warm-up time, circumfluence time, cooling time: According to heater length, control the contrail of circumfluence curve through coming to the control of conveyer belt speed, cooling zone boils fall gradient is controlled by cooling time and cooling zone wind force. 3, the jackknife of referenced temperature curve that circumfluence temperature curve creams with stannum supplier place is offerred as far as possible. 4, when handling circumfluence of two sides SMT to solder, solder first commonly the one side of small quality component, when if two sides all has great quality,face of parts of an apparatus of outfit great quality must be being stuck first on parts of an apparatus or craft, when undertaking the 2nd circumfluence solders, answer bottom already the great quality parts of an apparatus with good solder undertakes protective, prevent circumfluence 2 times to cause great quality parts of an apparatus to fall off. 5, when undertaking via circumfluence solders, should notice equipment and deferent system shake cause component displacement. The temperature curve that circumfluence solders CNC Milling