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Specific introduction for the composition of the reflow soldering technique
publié le 04/03/2021 à 04:15 |
Reflow soldering, generally known as "reflow soldering" or "reflow oven" (Reflow Oven Machine), should be to supply a heating environment to warmth the solder paste to soften and permit surface area mount factors and PCB pads to pass through the solder paste A device where by alloys are reliably merged with each other. Just what exactly are the key process parts from the reflow soldering equipment for manage? Guangshengde reflow soldering is here to share along with you.
Nitrogen reflow soldering
1. Reflow soldering transportation method
Reflow soldering composition
PCB products and solutions are transported from the reflow oven through the transportation program. The transportation process is mainly composed of transportation rails, transmission sprocket, chain, and transmission mesh belt. The conveying mesh belt is really a standard 440mm (Max 560mm) chrome steel mesh belt, as well as conveying velocity is steplessly altered by the management computer software. The width in the transportation guide rail could be adjusted freely according to the measurement from the PCB board in the course changer, the screw rod along with the nut generate, as well as width is often altered to 400mm-460mm.
It adopts chain community transmission, and the push system is put in with the exit of your furnace. The driving machine involves a driving motor, a driving shaft, a driving chain plus a sprocket, a information screw and other rail transportation factors.
2. The inner temperature zone composition of the reflow soldering furnace
The reflow soldering furnace overall body is mainly composed of an inlet, a preheating zone, a warmth preservation zone, a reflow zone and also a cooling zone. With all the tutorial rail given that the heart, the upper and reduced temperature zones circulate independently and regulate the temperature independently. The airflow in every unique temperature zone is accelerated, pressurized and heated, and then uniformly acts around the higher and lessen sides of the PCB with the rectifier plate. All heating zones of reflow soldering have two heating modules on best and base, which flow into independently and management temperature independently. Each and every temperature zone adopts the exact same modular framework, which is uncomplicated to maintain and replace.
three. Reflow soldering cooling zone
The reflow soldering cooling zone is usually a specially designed cooling module after the reflow zone, and an external chiller can recognize effective cooling.
If the nitrogen machine is selected, dual cooling zone cooling is made use of: the gas following warmth trade cooling is placed on the PCB board from previously mentioned with the water-cooled heat exchanger, cooling fan, and air curtain on the outlet. Soon after the PCB board is pressured to cool within the cooling zone, it is transported into the outdoors on the furnace with the transportation method to accomplish the reflow soldering.
The heat exchanger includes a filtering result within the flux, which might make sure that the cleanse gasoline circulates within the furnace; the cooling enthusiast has an appropriate air quantity to keep up a steady inert gas content in the cooling zone.
Adopt modular construction, warmth exchanger, cooling fan and rectifying orifice are effortless to keep up.
four. Reflow soldering transportation speed regulate
The velocity from the reflow oven transportation method could be set in accordance with the requires of buyers and managed by program. The control accuracy can achieve ?¨¤2mm/min.
5. Reflow soldering temperature management
The set temperature of each and every temperature zone of Guangshengde reflow soldering is set by computer software procedure. The particular temperature of each and every temperature zone is transmitted in the thermocouple mounted in every temperature zone and shown around the Personal computer watch display screen. At the same time, the command signal can be fed back again for the electric The stable state relay within the regulate box delivers ample energy to take care of the temperature for the established value.
6. Reflow soldering temperature measurement line interface
The temperature measurement line interface with the reflow oven is mounted within the operation user interface around the entrance from the device. The input close on the temperature measuring line is linked with the temperature measuring card around the industrial laptop or computer, and also the temperature curve during soldering is usually captured from the reflow oven manage software, as well as temperature curve can be displayed, printed, stored and recalled.
seven. Alarm safety for reflow soldering temperature exceeding tolerance
In the event the actual temperature exceeds the upper and reduced limits in the set temperature, the procedure will send out out an alarm sign and screen the alarm info from the software command, and simultaneously all heating zones will stop heating (the cooling zone will only alarm if your temperature is more than Established to 200??, once the upper and decrease restrict temperature is ready to 10??, once the genuine temperature exceeds 210?? or decrease than 190??, an alarm might be issued), the transportation method will continue to function, as well as the PCB board is going to be safely and securely sent outside of the reflow oven. Right after the cause of the fault is eliminated, turn on the heating switch again for heating.
eight. Reflow soldering gasoline management
Guangshengde reflow soldering furnace requires a gas manage unit, as the furnace have to be equipped with thoroughly clean nitrogen or air. The fuel handle units are:
l Import and export air curtain
l Ingestion and exhaust units and command application
l Circulation meter and oxygen concentration analyzer (optional for nitrogen sort)
l Optional flux recovery device
nine. Reflow soldering control technique
The reflow oven management procedure consists of PC+PLC and reflow oven manage software program. Can comprehend the setting from the procedure,
Precise control of the process (these kinds of as speed, temperature, functioning time), real-time monitoring on the position (temperature curve, over-temperature, lack of electricity phase) together with other functions.
The reflow soldering display screen is put in on the cantilever frame at 1 conclusion from the furnace, along with the cantilever might be rotated to adjust the situation on the screen and keyboard according to the requirements of use; the Personal computer is put in during the rack under the exhibit, surrounded by equipment door defense, and connected towards the PLC by a community cable.
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