Halogen-free soldering flux in solder stick for automatic soldering robot and preparation method

An automatic welding and robot technology, applied in welding equipment, welding medium, welding/cutting medium/material, etc., can solve the problems of high insulation resistance and low residue, achieve high surface insulation resistance, improve wetting force, and enhance reliability The effect of solderability

Inactive Publication Date: 2016-01-06
广东中实金属有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to overcome the shortcomings and deficiencies of the above-mentioned prior art to provide a halogen-free flux in solder wire for automatic welding robots, which is not easy to appear intermittent a

Method used

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  • Halogen-free soldering flux in solder stick for automatic soldering robot and preparation method
  • Halogen-free soldering flux in solder stick for automatic soldering robot and preparation method
  • Halogen-free soldering flux in solder stick for automatic soldering robot and preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Raw materials and mass percentages are as follows:

[0026]

[0027] Add 90.8kg of hydrogenated rosin into the container, heat and stir until completely melted, then add 2kg of FC4430, 1kg of nonylphenol polyoxyethylene ether, 1kg of polyethylene glycol monooleate, 0.4 kg of benzotriazole, 3kg of diethylene glycol and 1.8kg of triethylene glycol monobutyl ether, continue to stir for 30 minutes, let stand for 3 minutes, and make a kind of solder for automatic welding robot after filtering with a 200-mesh filter screen Halogen-free flux in wire Halogen-free flux. Pour the flux prepared above into the rosin barrel of the extrusion machine, extrude it into the solder wire at a temperature of 130°C and an air pressure of 0.15MPa, the flux accounts for 2.4% by weight of the solder alloy, and draw it through a wire drawing machine Solder wire with a wire diameter of Φ0.6mm was produced, and the performance test results are shown in Table 1.

Embodiment 2

[0029] Raw materials and mass percentages are as follows:

[0030]

[0031]

[0032] Add 90.49kg of water-white rosin into the container, heat and stir until completely melted, then add 2.5kg of FSN100, 0.5kg of nonylphenol polyoxyethylene ether, and 0.5kg of polyethylene glycol monoester at 135°C Ester, 0.01kg of methyl benzotriazole, 4kg of propylene glycol butyl ether and 2kg of diethylene glycol monohexyl ether, continue to stir for 40 minutes, let stand for 5 minutes, filter with a 200-mesh filter screen to make a The invention discloses a halogen-free flux in a solder wire for an automatic welding robot. Pour the flux prepared above into the rosin barrel of the extruder, extrude it into the solder wire at a temperature of 135°C and an air pressure of 0.18MPa, the flux accounts for 2.3% by weight of the solder alloy, and draw it through a wire drawing machine Solder wire with a wire diameter of Φ0.8mm was produced, and the performance test results are shown in Tabl...

Embodiment 3

[0034] Raw materials and mass percentages are as follows:

[0035]

[0036] Add 80kg of hydrogenated rosin and 10.25kg of disproportionated rosin into the container, heat and stir until completely melted, then add 2.5kg of FC4430, 0.5kg of NP-9, and 0.5kg of nonylphenol polyoxyethylene at a temperature of 140°C Ether, the hydroxybenzotriazole of 0.25kg, the diethyl succinate of 4.5g, the triethylene glycol monobutyl ether of 1kg and the triethyl carbitol ether of 0.5kg, continue stirring for 45 minutes, stand still for 5 minutes After filtering with a 200-mesh filter screen, a halogen-free flux in solder wire for automatic welding robots is made. Pour the flux prepared above into the rosin barrel of the extruder, extrude it into the solder wire at a temperature of 140°C and an air pressure of 0.18MPa, the flux accounts for 2.5% by weight of the solder alloy, and draw it through a wire drawing machine Solder wire with a wire diameter of Φ1.0mm was produced, and the performa...

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PUM

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Abstract

The invention relates to halogen-free soldering flux in a solder stick for an automatic soldering robot and a preparation method. The halogen-free soldering flux is characterized by being prepared from a high-temperature solvent, a high-boiling-point organic solvent, an activating agent, nonionic surfactant, corrosion inhibitor and modified rosin. The halogen-free soldering flux has the advantages that the excellent soldering assist effect on Sn-Cu series and Sn-Ag-Cu series lead-free solder is achieved, solder joint quality defects such as continuous tin, tip pulling, missing solder and solder beading are greatly reduced after soldering of the automatic soldering robot, oxidation films can be effectively removed, rapid soldering assist is achieved, no halogen-containing compound is added completely, and no harm is caused to health and the environment.

Description

technical field [0001] The invention relates to a halogen-free flux in solder wire for an automatic welding robot, which belongs to the field of electronic welding materials. [0002] The invention also relates to a preparation method of the halogen-free flux. technical background [0003] With the rapid development of the electronics industry, due to the low efficiency of manual welding and the increasing labor costs, many companies 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, most of the fluxes in the solder wire used by automatic welding robots use halogen-containing compounds or salts. Because this type of f...

Claims

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Application Information

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IPC IPC(8): B23K35/363B23K35/40
CPCB23K35/3612B23K35/362B23K35/40
Inventor 方喜波梁静珊熊有德方瀚宽方瀚楷
Owner 广东中实金属有限公司
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