Pre-preparation: Clean oil stains and oxide layers on the terminal surface; prepare qualified solder wire, constant temperature electric soldering iron (temperature adjusted to 350-400℃), flux, and take anti-static protection measures.
Flux pre-coating: Apply a small amount of flux evenly on the tinning area of the terminal to avoid excessive flux causing solder overflow.
Terminal preheating with iron: Touch the soldering iron tip lightly to the terminal's tinning area and preheat for 2-3 seconds to bring the terminal to the melting and bonding temperature of solder.
Solder adding and welding: Lean the solder wire gently against the contact between the preheated terminal and the soldering iron tip, let the solder melt naturally and wrap the terminal contact surface evenly, ensuring no cold solder or exposed copper.
Cooling and shaping: After removing the soldering iron and solder wire, keep the terminal stationary for 5-8 seconds to allow the solder to cool and shape naturally; do not touch the high-temperature solder with hands or tools.
Post-inspection: Check that the solder layer is smooth, without pinholes or solder piling, the conductive part of the terminal is closely attached, and clean up residual excess flux.
