How does the copper and aluminum tube butt welding machine reduce costs for air conditioners?

       Copper and aluminum pipe butt welding machineIt can connect copper pipes to copper pipes, aluminum pipes to aluminum pipes, and copper pipes to aluminum pipes. It has attracted attention because it is used in air conditioners and refrigerators.

Copper has excellent electrical conductivity, thermal conductivity, corrosion resistance and good processability. It is widely used as an electrical and thermal conductive material in the fields of power, electrical, refrigeration and energy. However, copper is a scarce metal and its price is relatively high, so finding substitutes for copper has become a top priority for researchers. Among many metals, aluminum’s electrical and thermal conductivity ranks fourth after silver, copper, and gold. Its density is only 1/3 of copper. It is rich in resources and cheap. Therefore, replacing copper with aluminum can reduce the weight of components, save materials, and reduce costs. However, the strength of aluminum is low, and aluminum cannot completely replace copper in some load-bearing components. Therefore, copper-aluminum welding has become a key technology in the research of replacing copper with aluminum.

The thermophysical properties of copper and aluminum are very different, resulting in poor weldability of copper and aluminum. The main problem is that intermetallic compounds such as Cu2Al, Cu;Al, CugAl4, CuAl, and CuAl2 are easily generated during the welding process. Intermetallic compounds are hard and brittle, and the formation of a large amount of intermetallic compounds in joints will lead to a decrease in plasticity, toughness and electrical conductivity. The degree of impact of intermetallic compounds on performance is related to its type, quantity, shape and distribution. The more intermetallic compounds in the weld and they are distributed in a network at the product boundary, the worse the performance of the welded joint will be. Research shows that the critical thickness of the intermetallic compound layer of aluminum-copper joints is 2.5 μm. If the thickness is greater than this value, the strength and conductivity will decrease rapidly. Therefore, the core issue of aluminum-copper welding is to avoid the generation of intermetallic compounds or to control the thickness of intermetallic compounds below the critical thickness.

​ ​ So what kind of welding machine can meet this requirement? Needless to say, it is a dedicated copper and aluminum pipe butt welding machine for Xinxing resistance welding machines. It uses a constant current control mode to accurately control energy, movement, positioning amount, and pressure. It does not require welding wire, flux, solder, or gas. It saves power and energy. It can be operated with one button at a speed of more than 10 people, and the stripping length exceeds 4mm and reaches 5mm. It is popular at home and abroad.

Wuxi Xinxing Welding Equipment Factory has been engaged in resistance welding machines for 29 years. Its core technical products include: semi-automatic butt welding machine, pneumatic-flash butt welding machine, multi-strand wire welding machine, foot pedal spot welding machine, pneumatic spot welding machine, medium frequency spot welding machine Machine, row welding machine mesh welding machine, resistance automatic welding machine, energy storage welding machine, copper rod aluminum rod disc circular welding machine, auto parts spot welding machine, sheet metal parts spot welding machine, home appliance hardware spot welding machine, small electrical appliance spot welding machine, copper row copper pipe welding machine,Nut spot welding machine, stainless steel welding machine, foil strip spot welding machine, aluminum spot welding machine, multi-head spot welding machine, bag cage spot welding machine, mesh welding machine, ton rack welding production line, resistance automatic welding machine, brazing machine, diffusion welding machine, projection welding machine, seam welding machine, wire and cable optical cable supporting equipment, etc., reaching more than 300 kinds. If you are interested in our welding equipment, please contact us.