A kind of solder preheating method

A soldering and preheating technology, applied in welding equipment, electric heating devices, metal processing equipment, etc., can solve the problems of easy generation of air bubbles in flux, short circuit of electronic components and explosion of solder joints, etc., to reduce the amount of spatter, reduce Short circuit, the effect of reducing the power of solder joint explosion

Active Publication Date: 2018-11-02
DONGGUAN OKATA ELECTRONICS & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] In the traditional soldering process, the tin wire contains flux. During the soldering process, the flux can instantly perform high-temperature rapid hot-melt spot welding on the tin wire. After heating, it is easy to expand the power of solder joint explosion, and the tin beads generated by solder joint explosion splash on the surface of electronic components and easily cause short circuit of electronic components

Method used

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  • A kind of solder preheating method
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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Embodiment 1. The tin wire with a diameter of 0.8mm is preheated. Before the tin wire layer is preheated, the sealing damage treatment is first performed. The tin wire does not set the preheating temperature. The temperature set when the tin wire is soldered with a high-temperature soldering iron is At 380°C, the amount of tin beads produced is less than 60%.

Embodiment 2

[0024] Embodiment 2. The tin wire with a diameter of 0.8 mm is preheated. The sealing damage treatment is not performed before the tin wire layer is preheated. The tin wire preheating time is set to 2 minutes, and the tin wire preheating temperature is set to 65 ℃, the temperature of the preheated soft tin wire for high-temperature soldering iron soldering is 380 ℃, and the amount of tin beads produced is less than 15%.

Embodiment 3

[0025] Embodiment 3. Preheating the tin wire with a diameter of 0.8 mm. Before the tin wire layer is preheated, the sealing damage treatment is first performed. The tin wire preheating time is set to 2 minutes, and the tin wire preheating temperature is set to 65 ℃, the temperature of the preheated soft tin wire for high-temperature soldering iron soldering is 380 ℃, and the amount of tin beads produced is less than 5%. It can be seen that before the tin wire is preheated, the sealing damage treatment is first performed on the tin wire layer. The optimal time for preheating the tin wire is 2 minutes, and the optimal temperature for preheating the tin wire is 65°C. When the optimum temperature of the final soft tin wire for high-temperature soldering iron soldering is selected as 380°C, under this condition, it not only greatly reduces the amount of solder balls produced, but also alleviates the rapid expansion of the flux and weakens the soldering process. The medium flux is r...

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Abstract

The invention discloses a soldering tin preheating principle and application. According to the invention, a bonding wire comprises a solder layer and scaling powder arranged in the solder layer, the soldering tin preheating principle is applied to carry out preheating treatment on solder before soldering iron is used for welding tin at a high temperature, and enables the solder to become the soft state after preheating from the solid state before preheating; after the solder layer and the scaling powder arranged in the solder layer are preheated, the solder layer is enabled to become soft from the solid state, and during the high-temperature welding process, the soft solder layer relieves the sharp expansive force of the scaling powder, weakens the power of welding spot explosion caused by instantaneous, rapid and sharp heated expansion of the scaling powder during the welding process, and reduces the phenomenon that welding spot explosion generates tin balls, and the tin balls splash to the surfaces of electronic elements to cause a short circuit. The preheating time, the temperature, the supply current and the power-on or power-off states can be intelligently controlled according to the production demands, the intelligent operation degree is high, the tin ball splashing quantity during welding spot explosion can be controlled and greatly reduced, the operation is very safe, the yield of the electronic elements is high, the quality effect is excellent, and the production cost is lowered.

Description

technical field [0001] The invention is applied in the technical field of preheating tin wires before soldering with a high-temperature soldering iron, and in particular relates to a soldering preheating method. Background technique [0002] In the traditional soldering process, the tin wire contains flux. During the soldering process, the flux can instantly perform high-temperature rapid hot-melt spot welding on the tin wire. After heating, it is easy to expand the power of solder joint explosion, and the tin beads generated by solder joint explosion splash on the surface of electronic components and easily cause short circuit of electronic components. Therefore, in view of the deficiencies of the above-mentioned technical problems in the traditional soldering process, the applicant has developed a soldering flux inside the tin wire and a tin wire layer containing the flux, which is used to pre-heat the tin wire before soldering with a high-temperature soldering iron. Heat...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23K3/047
CPCB23K3/047
Inventor 吴水鱼
Owner DONGGUAN OKATA ELECTRONICS & TECH
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