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Method for coating brazing filler metal layer

A solder and brazing technology, applied in welding/welding/cutting items, manufacturing tools, metal processing, etc., can solve the problem of the inability to guarantee the quantitative application of flux and the rapid automatic pre-coating of solder sheets, unstable production quality, and product scrapping The problem of high rate of production can be improved to achieve the effect of improving production efficiency and yield, strong practicability, and simple and feasible operation.

Inactive Publication Date: 2016-12-14
SHANGHAI HIWAVE COMPOSITE MATERIALS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In practical application, this method usually needs to manually apply the flux to the surface of the solder piece or the base metal, and then manually transfer the solder piece to the surface of the contact, so the quantitative application of the flux and the automatic rapid pre-preparation of the solder piece cannot be guaranteed. cover
Secondly, because the solder is easy to spread excessively under the action of the heat source, the production quality is unstable and the product scrap rate is high

Method used

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  • Method for coating brazing filler metal layer
  • Method for coating brazing filler metal layer
  • Method for coating brazing filler metal layer

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] This embodiment provides a method for coating the solder layer, which can realize automatic continuous solder coating by using an automatic paste dispensing device and an automatic feeding device. The basic operation steps are as follows:

[0027] In the first step, use YCL B-800 dispenser to control the extrusion of solder paste, set the input air pressure to 60psi, fill the syringe with solder paste, and adjust the solder paste extrusion volume to about 0.05ml;

[0028] In the second step, the silver contacts are placed on the conveyor belt with a vibrating plate feeder;

[0029] The third step is to fill the syringe with 15% silver solder paste, adjust the position of the syringe and the contact, and turn on the paste dispensing device. After the solder paste is extruded, it is just coated on the contact surface;

[0030] In the fourth step, the conveyor belt moves the silver contacts to directly below the induction welder coil;

[0031] The fifth step is to set the...

Embodiment 2

[0036] This embodiment provides a method for coating the solder layer, which can realize automatic continuous solder coating by using an automatic paste dispensing device and an automatic feeding device. The difference between this embodiment and Embodiment 1 is that the paste dispensing device is used to The point surface forms a triangle, the basic operation steps are as follows:

[0037] This embodiment provides a method for coating the solder layer, which can realize automatic continuous solder coating by using an automatic paste dispensing device and an automatic feeding device. The basic operation steps are as follows:

[0038] The first step is to use a special continuous dispenser to control the extrusion of solder paste, set the input air pressure to 40psi, fill the syringe with solder paste, and adjust the solder paste extrusion volume to about 0.01ml;

[0039] In the second step, the contacts are placed on the conveyor belt with a vibrating plate feeder;

[0040] T...

Embodiment 3

[0047] This embodiment provides a method for covering a solder layer. The difference between this embodiment and Embodiment 1 is that the paste is dispensed manually, and the heating method of the solder paste is changed. The basic operation steps of this embodiment are as follows:

[0048] In the first step, the solder paste is evenly coated on the contact surface manually;

[0049] In the second step, the solder paste is heated by flame brazing;

[0050] In the third step, the solder paste is heated and melted to spread, forming a solder layer on the contact surface.

[0051] The solder-clad contacts prepared by the above solution can be directly used for automatic welding. The formed welded joint has high strength and high brazing rate. 26wt% flux is evenly mixed in the solder paste in advance, so the produced contacts with solder layer can be directly used for automatic soldering.

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Abstract

The invention provides a method for coating a brazing filler metal layer. The method comprises the steps that firstly, the surface of a contact is painted with soldering paste, specifically, painting is achieved by adopting manual pasting equipment or automatic pasting equipment for quantitative and fixed-point pasting; and secondly, the soldering paste is heated, so that the soldering paste melts and spreads after being heated, and the brazing filler metal layer is formed on the surface of the contact. According to the method, quantitative and fixed-point accurate painting of the soldering paste can be achieved through an automatic pasting system, and efficient pre-coating of the brazing filler metal layer is achieved. Besides, flux can be evenly mixed in the soldering paste, the flux is stilled reserved after the soldering paste melts and spreads, thus, welding can be directly carried out after the contact is coated with the brazing filler metal layer, and no extra brazing filler metal or brazing flux needs to be added; and continuous automation can be achieved in the welding process, so that the labor cost is greatly reduced.

Description

technical field [0001] The invention belongs to the field of welding technology, in particular to a method for automatically covering the surface of a contact with a solder layer, which is mainly used in the fields of low-voltage and high-voltage electrical appliances. Background technique [0002] Contacts are the core components in electrical contact systems, mainly used in contactors, relays, circuit breakers, cam controllers, compensators, travel switches, foot switches, auxiliary switches, etc. Most of the currently produced contacts do not have a solder layer themselves. In the actual application process, additional soldering materials and fluxes are required to be soldered. The process is cumbersome and consumes a lot of manpower. Therefore, some manufacturers choose to cover the soldering sheet in a certain form on the surface of the contact to be welded before welding to form an electrical contact with its own solder layer structure, so as to achieve rapid welding. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K1/20B23K101/36
CPCB23K1/20
Inventor 毛琳王鹏鹏陈乐生
Owner SHANGHAI HIWAVE COMPOSITE MATERIALS CO LTD
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