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Brazing method

A brazing method and brazing technology, applied in the field of brazing and brazing in the electronics industry, can solve problems such as the inability to accurately control the amount of flux, and restrict the quality and efficiency of brazing production, so as to improve the quality and efficiency of spraying, Improve assembly efficiency and reduce physical damage

Inactive Publication Date: 2019-08-09
CHINA ELECTRONIC TECH GRP CORP NO 38 RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is that the traditional brazing production of electronic product components is manual coating of flux and assembly, which cannot accurately control the amount of flux, and also seriously restricts the quality and efficiency of brazing production

Method used

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Examples

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Effect test

Embodiment 1

[0037] refer to figure 1 , the present embodiment discloses a brazing method, comprising the steps of:

[0038] Step 1: Automatically spray flux to form pre-coated solder pads 1

[0039] Pre-spray halogen-free RMA or ROLO flux on the surface of the soldering piece by any of the spraying methods of automatic ultrasonic atomization spraying, air knife blowing or liquid constant flow spraying. Brazing workers do not need to touch liquid flux. Little damage.

[0040] Its principle is that during brazing, rosin and solder and oxides on the surface of the substrate (such as SnO and Cu 2 O etc.) the following reactions occurred:

[0041] 2C 19 h 29 COOH+SnO→Sn(C 19 h 29 COOH) 2 +H 2 O (1)

[0042] 2C 19 h 29 COOH+Cu 2 O→2CuCOOC 19 h 29 +H 2 O (2)

[0043] Since the surface to be welded of the deep cavity shell 2 and the circuit board 3 is gold-plated or silver-plated, the surface to be welded of the deep cavity shell 2 and the circuit board 3 has no oxidation, so it ...

Embodiment 2

[0057] Referring to this embodiment discloses a brazing method, comprising the following steps:

[0058] Step 1: Automated spraying of flux to form a pre-coated solder ring 4

[0059] The surface of the welding ring is pre-sprayed with halogen-free RMA or ROLO flux by any of the spraying methods of automatic ultrasonic atomization spraying, air knife blowing or liquid constant flow spraying. Brazing workers do not need to touch liquid flux. Little damage.

[0060] Its principle is that during brazing, rosin and solder and oxides on the surface of the substrate (such as SnO and Cu 2 O etc.) the following reactions occurred:

[0061] 2C 19 h 29 COOH+SnO→Sn(C 19 h 29 COOH) 2 +H 2 O (1)

[0062] 2C 19 h 29 COOH+Cu 2 O→2CuCOOC 19 h 29 +H 2 O (2)

[0063] Since the surfaces to be welded of the housing 5 and the connector 6 are gold-plated or silver-plated, the surfaces to be welded of the housing 5 and the connector 6 are free from oxidation, so it is not necessary t...

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Abstract

The invention discloses a brazing method. The method comprises the following steps that 1, a soldering flux is sprayed to form pre-coated solder; 2, an assembly is cleaned and subjected to air drying;3, components are assembled; 4, brazing is conducted; and 5, detecting, cleaning and air drying are conducted. The brazing method has the advantages that the soldering flux is automatically sprayed to form a pre-coated soldering terminal, so that the surface coating amount of the soldering flux can be accurately controlled, the penetration rate is ensured, the excessive soldering flux residues caused by excessive coating is avoided, the spraying quality and the spraying efficiency are improved, brazing workers do not need to be in contact with the soldering flux, the harm on human bodies is small, high-efficiency and intelligent production can be matched, so that the efficiency of the whole brazing production is improved, and the requirements of large-batch assembly automation and intelligent production are met.

Description

technical field [0001] The invention relates to the technical field of brazing in the electronic industry, in particular to a brazing method. Background technique [0002] With the development of the electronics industry, the competition for the performance of electronic products has intensified. A complete set of electronic equipment often needs to integrate thousands of components to meet the performance indicators. Facing the huge demand for components and the system requirements for component consistency, automation Production and intelligent production have become the only way to deal with it. The automation, digitization, and intelligent production of electronic products have become the focus of application and research in the market. However, although most of the components that meet the SMT (Surface Mounted Technology abbreviation, surface mount technology) process standards have been gradually trying to be intelligently manufactured, whether it is widely used in ra...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K1/008B23K1/20B23K35/363B23K101/42
CPCB23K1/008B23K1/203B23K1/206B23K35/362B23K2101/42
Inventor 王禾闵志先张加波潘旷任榕
Owner CHINA ELECTRONIC TECH GRP CORP NO 38 RES INST
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