Gas shielded high frequency brazing

Gas shielded high frequency brazing

  When metals are heated to high temperatures under normal circumstances, oxygen in the air will oxidize the surface of the metal and form oxide scales. The presence of oxides hinders the brazing process, in order to eliminate oxides and clean the surface of the parts. In the process of brazing, we can protect the parts by the following measures.

1. Use flux

  Flux not only has the effect of enhancing the fluidity of the solder but also preventing oxidation, but the anti-oxidation effect of using flux is very limited, and it does not guarantee that the entire part will not be oxidized. If it is necessary to ensure that the entire part is not oxidized, we can adopt vacuum brazing and gas shielded welding.

2. Vacuum high frequency brazing

  One of the advantages of high-frequency brazing is that it can be brazed in a vacuum. Because there is no oxygen involved in vacuum high-frequency brazing, the metal does not undergo oxidation reaction, and no flux is needed to ensure the welding effect. As long as our parts Choose the right one to meet the specifications of vacuum welding. As long as the time is fixed, we can ensure that the brazing quality of all parts is exactly the same. We will introduce the article on vacuum high-frequency brazing in How to Prevent Welding Oxidation (2).

3. Gas shielded welding

  Gas shielded welding is often used for furnace brazing, and furnace brazing is a common brazing method. But the advantages and disadvantages of brazing in the furnace are obvious. For example: the equipment is expensive, brazing in the furnace requires a long heating time and cooling time, and the cost of welding is very high for products with small batches. With the development of brazing technology, the maturity of high-frequency brazing technology has greatly reduced the cost of gas shielded welding!

Advantages of high frequency brazing

  The advantage of high-frequency brazing lies in its flexibility, the ability to arrange production tasks at any time according to the production plan, low manual skills requirements, small equipment footprint, and low use and maintenance costs. As long as our equipment is selected reasonably and in accordance with the welding specifications, the effect of brazing in the furnace can be achieved, or even better!

Case Sharing-High Frequency Brazing of Air Conditioner Solenoid Valve

The electromagnetic valve

  The air-conditioning solenoid valve is a key component to adjust the temperature of the air-conditioning. The welding quality of solenoid valves is mainly evaluated from the following aspects: appearance, whether there is oxide scale or discoloration, whether there is burns, solder accumulation, solder penetration, whether there are pores, whether there is false welding, etc. In the actual use of the solenoid valve, the outer oxide scale will affect the appearance of the part, and the inner oxide scale will affect the welding quality and cause abnormal functions. After analysis, whether there is oxide scale or discoloration has become a key factor affecting the success or failure of this welding. For this reason, we designed a set of special high-frequency brazing equipment for the welding of solenoid valves. After actual use at the customer's site, this set of equipment can effectively guarantee welding quality, improve production efficiency, and reduce costs. The following video records the entire process of high-frequency brazing of solenoid valves.

Summarize

  Gas shielded high frequency brazing is a brazing process to avoid oxidation in the welding process of parts. It has the advantages of flexible use, low labor requirements, low maintenance and use costs, and can achieve ideal welding under the premise of proper use. The effect is a very reliable brazing process. However, there are still some factors in the welding process that can still lead to welding failure if improperly considered! For example: welding power source selection, heating process control, solder selection, tooling design and material selection, shielding gas selection, shielding gas flow rate, cooling medium selection, cooling medium spray angle, opening timing, etc. All are closely related to the final welding effect. If you are interested in learning more, you can leave a message below or leave your contact information, we will be happy to share with you!