Lead-free tin-soldering wire applied to automatic soldering robot and preparation method thereof

Abstract

The invention relates to a lead-free tin-soldering wire applied to an automatic soldering robot and a preparation method thereof. The lead-free tin-soldering wire is characterized by comprising Cu, Se, Ni, P, Nd and Sn. The preparation method of the lead-free tin-soldering wire applied to the automatic soldering robot comprises the following steps: respectively preparing a Sn-Cu alloy, a Sn-Ge alloy, a Sn-Ni alloy, a Sn-P alloy and a Sn-Nd alloy through Cu, Ge, Ni, P, Nd and Sn according to a ratio; then heating the prepared Sn-Cu alloy in a smelting furnace, adding the Sn-Ni alloy, stirring, preserving heat, then adding the Sn-Ge alloy and the Sn-Nd alloy, then cooling, adding the Sn-P alloy, finally reducing the temperature of the furnace to 300-340 DEG C, preserving heat, discharging the alloys out of the furnace to prepare a soldering flux column; extruding and drawing to obtain the lead-free tin-soldering wire. The lead-free tin-soldering wire can be suitable for the soldering flux of various automatic soldering robots in a large range; the defects of continuous tin, lcicles and tin balls can be reduced and solved to a maximum extent; the lead-free tin-soldering wire is high in corrosion resistance; crystals are thinned; the resistance to high temperature of the welding flux is improved; the advantage and the effect of oxidation resistance of soldering points are improved.

Description

technical field [0001] The invention relates to a lead-free solder wire for an automatic welding robot, which belongs to the field of electronic solder. [0002] The invention also relates to a preparation method of the lead-free solder wire for the automatic welding robot. technical background [0003] With the rapid development of the electronics industry, due to the low efficiency of manual welding and higher labor costs, many manufacturers gradually use automatic welding robots to replace manual solder wire welding. The welding efficiency of automatic welding robots is higher than that of manual labor, the cost advantage is obvious, the amount of tin used is accurate, and the amount of waste residue is reduced, but there are also some obvious shortcomings. It cannot judge the quality defects of solder joints and fill tin like humans. At present, the solders used in automatic welding robots are mainly Sn‐0.7Cu, Sn‐3.0Ag‐0.5Cu, Sn‐0.3Ag‐0.7Cu and other types. The common d...

AI Technical Summary

Problems solved by technology

The welding efficiency of automatic welding robot is higher than that of manual labor, the cost advantage is obvious, the amount of tin used is accurate, and the amount of waste residue is reduced, but there are also some obvious shortcomings. It is impossible to judge the quality defects of solder joints and fill tin like humans

At present, the solders used in automatic welding robots are mainly Sn‐0.7Cu, Sn‐3.0Ag‐0.5Cu, Sn‐0.3Ag‐0.7Cu and other types. The common defects in the use of automatic welding robots mainly include: , pull tip, tin bead