Lead-free high-frequency soldering table abandons the concept of resistance ceramic heater used in traditional temperature control soldering iron, that is, it adopts high-frequency eddy current heating principle (induction heating principle). In order to obtain a certain temperature for welding, it is necessary to choose the corresponding heating methods, such as conduction, convection, radiation, etc. The traditional temperature-controlled soldering iron adopts the conduction method, that is, a certain amount of heat energy generated by the ceramic heater is transmitted to the welding head through contact and stored energy to meet the welding temperature;

 

A: Electromagnetic welding tables (SMY-303,305,306) adopt the principle of high-frequency eddy current heating, which makes the welding head heat itself, eliminates the heat conduction process, reduces the heat loss, and makes the temperature rise and return quickly.

When the heating core is electrified with 380K high-frequency alternating current, an alternating magnetic field will be generated in the coil of the heating core. At this time, magnetic lines will pass through the welding head installed at the front end of the heating core. Due to the change of magnetic field intensity, an annular closed induced current will be generated in the welding head. This induced current is called eddy current. Because of the thermal effect of the current, the welding head heats up and the temperature rises rapidly.

 

B: The temperature sensor of the lead-free high-frequency soldering table is placed in front, and the welding head directly acts on the soldering position during the soldering process. How the welding head temperature directly affects the soldering quality, so it is very important to reflect and control the true temperature of the tip of the soldering iron. The sensor of ordinary constant temperature welding table is usually about 20mm away from the head of welding head, and the temperature reflected by it is not the actual temperature of welding head's mouth; However, the sensor of lead-free high-frequency welding table can reach the head of welding head and sensitively reflect the head temperature, that is, the actual temperature of the welding point, thus making the compensation and shutdown of heat energy more sensitive.

 

C: Based on the above points A and B, the lead-free high-frequency welding table is not only suitable for lead-free welding, but also suitable for large spot welding, rapid continuous welding and specified low-temperature welding. There is no need to idle a high temperature. When the temperature of the induction welding head drops, the heating power of 90W makes the heat energy spurt out immediately, completing good welding, and avoiding the phenomenon of weak connection caused by cold welding.

 

D: In general constant temperature welding tables, such as SMY 936 and 937, in most cases, the heating core is not damaged naturally, but caused by human factors when the heating element is not fixed satisfactorily. The lead-free high-frequency soldering station adopts a special bayonet fixing method to scientifically fix the heating element (induction coil) and the handle grip into a whole, thus avoiding the phenomenon of lead wire breakage or circuit short circuit caused by twisting the welding head or heating element.