Production of phi-0.1 cored lead-free soldering wire

Abstract

The invention is concerned with the manufacture method for core non-plumbum tin wire with 0.1mm diameter, it is: the alloy of tin, silver, copper and lanthanum, that the content is silver 0.1 - 4.0%, copper 0.2-2.2%, lanthanum 0.01-0.5%, and tin is surplus, and flux is extrusion to the core non-plumbum tin wire with 6.0mm - 12.0mm diameter by over 350 ton oil-hydraulic press, pulls the core non-plumbum tin wire with 6.0mm - 12.0mm diameter to core non-plumbum tin wire with 0.6mm diameter, uses crude diamond model allotype that is 66 moulds to pull to be the core non-plumbum tin wire with 0.1mm diameter, uses the mould under D group to pull for two hours then changes the mould that can be used by wash three times after changing by kerosene, cools 25 - 30 minutes for each pull wires then pull it again.

Description

technical field [0001] The invention relates to a production method of cored lead-free solder wire, which belongs to a welding material processing method. Background technique [0002] φ0.1mm lead-free solder wire is a soldering material for high-quality electronic products, especially for high-precision electronic products with high wiring density. Because this kind of lead-free solder wire is not only small in fineness but also high in precision, it is difficult to process. The problem is that it is difficult to match the temperature of the wire drawing oil with the high hardness and small elongation coefficient of the tin wire, especially when the tin wire is drawn to less than 0.25mm, the tin powder and dirt adhering to the die hole and the sizing belt are very easy to cause Broken wire, and ordinary molds cannot guarantee that the extension will not be deformed, the AC motor will not start smoothly, the torque will be large, the accuracy will be low, the speed of wire d...

AI Technical Summary

Problems solved by technology

[0002] φ0.1mm lead-free solder wire is a soldering material for high-quality electronic products, especially for high-precision electronic products with high wiring density. Because this kind of lead-free solder wire is not only small in fineness but also high in precision, it is difficult to process. The problem is that it is difficult to match the temperature of the wire drawing oil with the high hardness and small elongation coefficient of the tin wire, especially when the tin wire is drawn to less than 0.25mm, the tin powder and dirt adhering to the die hole and the sizing belt are very easy to cause Broken wire, and ordinary molds cannot guarantee that the extension will not be deformed, the AC motor will not start smoothly, the torque will be large, the accuracy will be low, the speed of wire drawing will be uneven and unstable, and the wire will be broken due to uneven force and vibration. At present, φ0.1mm cored lead-free solder wire does not have this product in China, basically rely on imports, and the price is high