1. Put forward ideas
Through the observation and actual use of the existing electric soldering irons on the market, it is found that the reason why the twisted wires cannot be effectively tinned is that the commonly used electric soldering irons are mainly used for soldering electrical components, and the shape of the soldering iron tip used is basically All of them are pointed, straight, knife-shaped and so on. Such a soldering iron tip can quickly concentrate the heat generated by the heating element of the electric soldering iron to the soldering point that needs to be heated during the soldering operation, reducing the contact time between the soldering iron and the soldered components, facilitating rapid soldering and avoiding heating Excessive damage to components. However, when using such an electric soldering iron for tinning operation, due to the shape limitation of the soldering iron tip, when the soldering iron tip is placed on the twisted part of the wire for heating, the contact between the soldering iron tip and the twisted wire is only a point in most cases. Contact, the contact surface is too small to quickly transfer the heat of the soldering iron tip to the surface of the wire that needs to be tinned, so that the melted solder cannot fully and effectively penetrate into the surface of the stranded wire, so that the melted solder cannot be fully Effective penetration into stranded conductors
Aiming at the problem that the contact surface between the electric soldering iron tip and the twisted wire is too small, which affects the rapid and effective heat transfer, according to the temperature difference, contact area, contact time and other related factors that restrict heat conduction, the author initially proposed to increase the heat transfer by increasing the contact area. idea. The specific idea is to increase the contact surface between the electric soldering iron and the twisted wire by adding a longitudinal groove on the connecting rod of the soldering iron without changing the soldering function of the original soldering iron. In order to better cooperate with the stranded wire, the shape of the longitudinal groove needs to be made into a circular arc. Such arc-shaped grooves can not only greatly increase the contact area between the heating part of the electric soldering iron and the stranded wire, but also facilitate and effectively perform tin melting and tin ironing operations.
2. Physical transformation
In order to realize the above-mentioned plan, considering that it is necessary to make a groove on the connecting rod of the soldering iron tip without affecting the mechanical strength of the connecting rod, the author uses a circular file with a pointed tip of 4mm in diameter on the connecting rod that is common in the market. The connecting rod of the electric soldering iron is about 6mm away from the tip of the soldering iron and longitudinally file an arc-shaped groove with a diameter of about 4mm and a depth of about 1mm. One way of slotting is to slot horizontally along the longitudinal direction of the connecting rod axis of the soldering iron tip, which is relatively easy to implement. Another way is to slot circularly along the longitudinal direction of the connecting rod axis of the soldering iron tip. This modification process is relatively time-consuming and difficult.
