High-frequency welding machine for copper tube brazing compressor copper tube welding capillary welding

The following is an introduction about the high-frequency welding machine used for welding copper pipes, compressor copper pipes and capillaries:

principle of operation

Electromagnetic induction principle: the internal circuit of high-frequency welding machine generates high-frequency current, and the high-frequency alternating magnetic field is generated through the induction coil. When the induction coil is close to the copper tube to be welded, compressor copper tube or capillary tube, strong eddy current will be generated in these metal tubes due to electromagnetic induction. Because the metal has resistance, the electric energy is converted into heat energy when the eddy current flows in the metal tube, so that the welding part is quickly heated to a molten state, and then welding materials are added to fill the weld, and the welding is completed after cooling and solidification.

Skin effect and proximity effect: The eddy current generated by high-frequency current mainly concentrates on the conductor surface, which leads to the rapid temperature rise of the surface. This is the skin effect, which makes high-frequency welding suitable for surface heating and local heating. When two or more conductors are close to each other and connected with high-frequency current in opposite directions, the magnetic field interaction between them will generate extra heat, that is, proximity effect, which can further improve the heating efficiency.

advantage

Flexible operation: Hand-held high-frequency welder is small and light, and can be flexibly adjusted in narrow spaces with complicated internal structures such as air conditioners and refrigerators and at various angles, so that the induction coil can be accurately aligned with the welding position, which is not limited by space and is convenient for on-site maintenance, and welding work can be carried out anytime and anywhere.

High welding efficiency: High-frequency current has a high heating speed, which can heat the welding parts of copper pipes to a molten state in a short time, greatly shorten the welding time of a single welding point in mass production and improve the overall production efficiency. And the equipment has good heat dissipation and electrical performance, and can be continuously operated for a long time.

High weld quality: the heating speed is fast and the area is concentrated, which reduces the contact time between copper tube and air at high temperature and reduces the probability of welding defects such as oxidation and porosity. It can also accurately control the temperature and heating time of the welding part, so that the metal structure at the welding seam can be well fused and crystallized, and the strength and performance of the welding seam can be improved.

Energy saving and environmental protection: compared with traditional flame welding, high-frequency welding machine has no open flame, does not produce harmful gas and smoke, reduces environmental pollution, and at the same time, has high power utilization rate and significantly reduces energy consumption.

Strong controllability: the heating temperature and depth can be accurately controlled by adjusting the heating frequency, power and time, which can adapt to the size and shape of different materials and meet the requirements of high-precision temperature control. It can also integrate an automation system to realize full-process automatic production.

Application scenario

Refrigeration industry: In the manufacture of refrigeration equipment such as air conditioners, refrigerators, freezers, etc., it is used to connect copper pipes of compressors with other parts, and to weld capillaries with other pipelines, so as to ensure the tightness of refrigeration systems and the smooth circulation of refrigerants.

Automobile manufacturing: it can be used for welding copper pipes in automobile radiator, air conditioning system, braking system and other parts.

Electronic industry: it is suitable for welding some small copper tubes and capillaries in electronic equipment, such as the capillary copper tube welding of temperature equalizing plate, to ensure the efficient heat dissipation of electronic equipment.

Aerospace: used for welding copper pipes of cooling system, hydraulic system and pneumatic system of aircraft, rockets and other aerospace vehicles.