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Spring-shaped environment-friendly coating silver solder ring

A silver brazing filler metal and environment-friendly technology, which is applied in the field of spring-shaped environment-friendly coated silver brazing filler metal rings, can solve the problems of not being able to produce non-strip or rod covered brazing filler metals, harming the health of operators, polluting the environment, etc. , to achieve the effect of shortening the melting time, low production cost and simple production process

Active Publication Date: 2017-05-17
ZHENGZHOU RES INST OF MECHANICAL ENG CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Chinese patent CN202804495 U discloses "a brazing material coated with a coating", which is to press-coat the coating onto a brazing rod, but this method can only produce brazing rods with a thick coating and cannot be used for production Non-strip or rod-shaped sheathed solder; Chinese patent CN101190479 A also discloses a kind of "red copper tungsten argon arc welding welding wire with flux sheath layer", which uses acrylic resin adhesive to bond the flux, and then the flux Pressure-coated onto the welding wire; the signed article "Development of Coated Brass Solder" also introduces a layer of coating on the surface of filamentary brass solder, and the coating is bonded together by organic adhesive
Since the above methods all use organic adhesives to press-coat the flux onto the welding wire, the burning during welding not only pollutes the environment, but also damages the health of the operator, which is not environmentally friendly.

Method used

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  • Spring-shaped environment-friendly coating silver solder ring

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] The preparation method of the spring-shaped environment-friendly type drug-coated silver solder ring of the present invention is as follows:

[0018] a) Mix silver, copper, zinc, and tin according to the ratio of 34:36:27.5:2.5 and melt them, cast them into Φ50 mm rod-shaped solder alloy ingots, cut off the risers and turn the ingots to remove scale ,stand-by;

[0019] b) Raise the temperature of the solder extrusion equipment to 460 °C, place the turned ingot in the muffle furnace for preheating, the preheating temperature is 470 °C, put the preheated ingot into the mold of the extrusion equipment Inside, extruded into a Φ1.7 mm solder wire, and drawn to a Φ0.7 mm silver solder wire;

[0020] c) Clean the drawn silver brazing wire and put it into the material tray of the ring-making equipment, and wind the silver brazing wire into a hollow structure with a middle diameter of Φ4.5 mm and a number of turns of 4 turns. A spring-shaped solder core with a distance (the ax...

Embodiment 2

[0025] The preparation method of the spring-shaped environment-friendly type drug-coated silver solder ring of the present invention is as follows:

[0026] a) Silver, copper, zinc, nickel, and manganese are mixed according to the ratio of 49:16:23:4.5:7.5 and smelted, cast into a Φ50mm rod-shaped solder alloy ingot, cut off the riser and turn the ingot Remove the oxide skin and set aside;

[0027] b) Raise the temperature of the solder extrusion equipment to 460 °C, place the turned ingot in the muffle furnace for preheating, the preheating temperature is 470 °C, put the preheated ingot into the mold of the extrusion equipment Inside, extruded into Φ2.5 mm solder wire, and drawn to Φ1.0 mm silver solder wire;

[0028] c) Clean the drawn silver brazing wire and put it into the material tray of the ring-making equipment, wind the silver brazing wire into a hollow structure with a middle diameter of Φ8.0mm, the number of turns is 2 turns, and the pitch (The axial distance betw...

Embodiment 3

[0033]The preparation steps are the same as in Example 1, and the difference is that the solder composition is silver: copper: zinc=45:30:25; the preheated ingot is put into the die barrel of the extrusion equipment and extruded into Φ2. 0 mm brazing wire, and rolled into oblate silver solder with a thickness of 0.9 mm; then the oblate silver solder was made into a spring-shaped silver solder core with a middle diameter of Φ6. Silver flux containing 20% ​​sodium fluoride, 35% potassium fluoroborate, 42% boric acid, and 3% elemental boron is placed in a container and water is added to make a viscous saturated flux liquid.

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Abstract

The invention discloses a spring-shaped environment-friendly coating silver brazing material ring, which consists of at least two rings of spring-shaped silver brazing material cores with a median diameter of 2.0 mm to 56.0 mm wound by filaments or thin narrow strips of silver brazing material It is composed of silver brazing flux coating coated on the outside of the spring-shaped silver solder core. The silver brazing flux includes at least one of inorganic fluoride, potassium fluoroborate, boric anhydride, borate, and elemental boron. The silver brazing flux , polyvinyl alcohol, methyl cellulose and water according to a certain ratio to prepare flux solution, directly coated on the outer surface of the spring-shaped silver solder core, after drying, you can get a spring-shaped environment-friendly coating silver solder Finished material ring. The spring-shaped environment-friendly coating silver solder ring of the present invention, because it does not contain organic binders, complies with ROHS standards, greatly reduces environmental pollution during brazing and combustion, thereby protecting the health of operators, and greatly reducing the risk of environmental pollution. Reduced the labor intensity of the brazing process.

Description

technical field [0001] The invention relates to welding materials, in particular to a spring-shaped environment-friendly coating silver solder ring suitable for brazing copper or steel thin-wall pipelines in various industries such as machinery, air conditioning and refrigeration. Background technique [0002] The traditional brazing process of air-conditioning and refrigerator pipelines is manual flame brazing with silk or strip-shaped silver solder. The heating time is longer when welding metals with fast heat conduction such as copper. When brazing, it is necessary to use wire or strip-shaped silver brazing material to coat the flux on the workpiece before heating or pre-heating. The amount of brazing material cannot be guaranteed, and problems such as welding leakage and welding blockage are prone to occur The rework, rework or even scrapping caused the waste of silver solder and raw materials and increased the manufacturing cost. In addition, the pre-soldering operati...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23K35/24B23K35/14B23K35/363B23K35/40
CPCB23K35/0222B23K35/24B23K35/362B23K35/40
Inventor 龙伟民吕登峰董显张雷张青科杨继东齐剑钊程亚芳
Owner ZHENGZHOU RES INST OF MECHANICAL ENG CO LTD
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