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Method for producing lead-free in wire of three cores in diameter 0.25 mm

A lead-free solder and production method technology, applied in welding media, welding equipment, welding/cutting media/materials, etc., can solve the problems of increasing production cost, complex production process, slow welding speed, etc., to prevent stretching The effect of broken wire, good heat dissipation and accurate sizing

Inactive Publication Date: 2007-11-14
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] With the vigorous development of the electronics industry and the improvement of the weight, miniaturization and miniaturization of electronic products, the quality requirements of electronic products are more stringent. Replaced by lead solder, the current development speed of lead-free solder is very fast, especially the lead-free ultra-fine solder wire is not produced in China at present, and it has to rely on imports, and imported products are expensive due to complex production processes, and the cycle is long. The production cost of the enterprise is high, and it is a single-core lead-free solder wire, and the welding speed is relatively slow

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Extrude the tin-copper alloy containing 0.1% copper and the tin-copper alloy and flux with a 350-ton hydraulic press to form a Φ9mm three-core lead-free thick solder wire with a pressure of 160kg / cm 2 , the temperature in the front of the extrusion chamber is 95±5°C, the temperature in the back chamber is 65±5°C, the wire speed is 2.0 m / min, and then the Φ9mm three-core lead-free thick solder wire is drawn to the Φ0.6mm three-core by a wire drawing machine according to the conventional method Lead-free soldering wire, select the wire drawing oil produced in West Germany, the temperature of the wire drawing oil is 25 ℃, and then use four groups of molds to match the Φ0.6mm three-core lead-free solder wire from group A, group B, group C and group D for a total of 38 Each mold is drawn to Φ0.25mm three-core lead-free solder wire. After each group of wire drawing, the tin wire is cooled for 25 minutes before entering the next group of wire drawing. The aperture and number of...

Embodiment 2

[0035] Extrude the tin-copper alloy containing 0.7% copper and the tin-copper alloy and the flux with a 350-ton hydraulic press to form a Φ9mm three-core lead-free thick solder wire with a pressure of 150kg / cm 2 , the temperature in the front of the extrusion chamber is 95±5°C, the temperature in the back chamber is 65±5°C, the wire speed is 1.8 m / min, and then the Φ9mm three-core lead-free thick solder wire is drawn to the Φ0.6mm three-core by a wire drawing machine according to the conventional method Lead-free solder wire, choose domestic wire drawing oil, the temperature of the wire drawing oil is 55 ℃, and then use four groups of molds to match the Φ0.6mm three-core lead-free solder wire from group A, group B, group C and group D, a total of 38 pieces The mold is drawn to Φ0.25mm three-core lead-free solder wire. After each group of wire drawing, the tin wire is cooled for 30 minutes before entering the next group of wire drawing. The aperture and number of molds for each ...

Embodiment 3

[0037] Extrude tin-copper alloy containing 1.0% copper and tin-copper alloy and flux with a 350-ton hydraulic press to form Φ9mm three-core lead-free thick solder wire with a pressure of 140kg / cm 2 , the temperature in front of the extrusion chamber is 95±5℃, the temperature in the back chamber is 65±5℃, the wire speed is 1.6 m / min, and then the Φ9mm three-core lead-free thick solder wire is drawn to the Φ0.6mm three-core by a wire drawing machine according to the conventional method Lead-free solder wire, select wire drawing oil produced in West Germany, the temperature of the wire drawing oil is 70°C, and then use four groups of molds to make Φ0.6mm three-core lead-free solder wire from group A, group B, group C and group D 38 dies are drawn to Φ0.25mm three-core lead-free solder wires. After each group of wires is drawn, the tin wires are cooled for 30 minutes before entering the next group of wires.

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Abstract

A process for preparing 0.25-mm three-core non-lead soldering wire includes proportionally providing SnCu alloy or SnAg alloy and flux, squeezing by 350-ton hydraulic press to obtain 9-mm three-core non-lead soldering wire, conventional drawing to obtain 0.6-mm one, and drawing via 4 groups of 38 dies to obtain 0.25-mm one.

Description

technical field [0001] The invention relates to a production method of Φ0.25mm three-core lead-free solder wire, belonging to a production method of welding materials. Background technique [0002] With the vigorous development of the electronics industry and the improvement of the weight, miniaturization and miniaturization of electronic products, the quality requirements of electronic products are more stringent. Replaced by lead solder, the current development speed of lead-free solder is very fast, especially the lead-free ultra-fine solder wire is not produced in China at present, and it has to rely on imports, and imported products are expensive due to complex production processes, and the cycle is long. The production cost of the enterprise is high, and it is a single-core lead-free solder wire, and the welding speed is relatively slow. Contents of the invention [0003] The purpose of the present invention is to provide a simple and environment-friendly production...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23K35/40B23K35/26
Inventor 苏明斌严孝钏何秀坤苏传港苏传猛
Owner 昆山成利焊锡制造有限公司