Production of phi-0.1 cored lead-free soldering wire

A lead-free solder and production method technology, applied in wire drawing dies, welding equipment, welding media, etc., can solve the problems of unstable starting of AC motors, inability to guarantee extension without deformation, high hardness and small elongation coefficient, etc., and achieve tensile strength. The effect of reducing, small torque, and improving compactness

Active Publication Date: 2007-11-21
昆山成利焊锡制造有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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, t

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0026] Example 1

[0027] By weight, the tin-silver-copper-lanthanum alloy containing 0.1% silver, 2.2% copper, 0.01% lanthanum and 97.69% tin, and flux (flux amount according to customer requirements) is extruded with a hydraulic press of no less than 350 tons Pressed into φ6.0mm cored lead-free solder wire, the pressure is 160Kg / cm 2 , The temperature of the front chamber of the extrusion is 95±5℃, the temperature of the rear chamber is 65±5℃, and the wire-out speed is controlled to 3.0m / min; then the φ6.0mm cored lead-free solder wire is drawn with a wire drawing machine to φ0.6mm cored Lead-free solder wire, select imported drawing oil, the temperature of the drawing oil is 50℃, and then draw the φ0.6mm cored lead-free solder wire with a DC motor. When drawing, use 8 groups of natural diamond molds to match the molds from group A, Group B, Group C, Group D, Group E, Group F, Group G, Group H have a total of 66 dies drawn to φ0.1mm cored lead-free solder wire. Die below group D...

Example Embodiment

[0036] Example 2

[0037] By weight, the tin-silver-copper-lanthanum alloy containing 0.5% silver, 1.5% copper, 0.05% lanthanum and 97.95% tin and flux are extruded into a φ8.0mm coreless alloy with a hydraulic press of no less than 350 tons. Lead solder wire, pressure is 180Kg / cm 2 , The temperature of the front chamber of extrusion is 95±5℃, the temperature of the rear chamber is 65±5℃, and the wire-out speed is controlled to 2.0m / min; then the φ8.0mm cored lead-free solder wire is drawn with a wire drawing machine to φ0.6mm with core Lead-free solder wire, select imported drawing oil, the temperature of the drawing oil is 60℃, and then draw the φ0.6mm cored lead-free solder wire with a DC motor. When drawing, use 8 groups of natural diamond molds to match the molds from group A, Group B, Group C, Group D, Group E, Group F, Group G, Group H have a total of 66 dies drawn to φ0.1mm cored lead-free solder wire. Die below group D will be drawn for 2 hours and then replace the spare ...

Example Embodiment

[0038] Example 3

[0039] By weight, the tin-silver-copper-lanthanum alloy containing 1.0% silver, 1.0% copper, 0.1% lanthanum and 97.9% tin, and flux is extruded into a φ10.0mm coreless alloy with a hydraulic press of no less than 350 tons. Lead solder wire, pressure is 200Kg / cm 2 , The temperature of the front chamber of the extrusion is 95±5℃, the temperature of the rear chamber is 65±5℃, and the wire-out speed is controlled to 1.5m / min; then the φ10.0mm cored lead-free solder wire is drawn with a wire drawing machine to φ0.6mm cored Lead-free solder wire, select imported drawing oil, the temperature of the drawing oil is 70℃, and then draw the φ0.6mm cored lead-free solder wire with a DC motor. When drawing, use 8 groups of natural diamond molds to match the molds from group A, Group B, Group C, Group D, Group E, Group F, Group G, Group H have a total of 66 dies drawn to φ0.1mm cored lead-free solder wire. Die below group D will be drawn for 2 hours and then replace the spare ...

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PUM

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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...

Claims

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Application Information

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IPC IPC(8): B23K35/40B23K35/26B21C23/08B21C31/00B21C1/02B21C3/02
Inventor 苏明斌严孝钏何繁丽苏传港苏传猛
Owner 昆山成利焊锡制造有限公司
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