PFSA185 3BSE074212R1 Copper and Aluminum Tube Welding Process

PFSA185 3BSE074212R1 In order to achieve high-quality welding of copper and aluminum tubes and to match the high control accuracy of PLC, it is necessary to design and manufacture a high-precision actuator.This paper analyzes the copper and aluminum tube welding process and its characteristics, the welding process is broken down into six actions, which contains the movement are linear, so as to consider the use of hydraulic cylinders or cylinders as the main components of the actuator. After comparison, it was decided to adopt pneumatic system to design the actuator of copper and aluminum pipe butt welding machine. Fixture is also one of the key components of the actuator, so this paper is also a more detailed analysis of the design of copper and aluminum pipe butt welding machine fixture.

PFSA185 3BSE074212R1 copper-aluminum pipe shape as a whole is not limited, so only consider the shape of the tube near the end. To be welded to the end of the copper tube is conical, aluminum tube is always cylindrical, as shown in Figure 1 (a), (b). Welding, the copper tube to the aluminum tube relative movement, when the copper tube inserted into the aluminum tube and its contact, connected to the welding circuit, the copper and aluminum tubes between the generation of large currents, so that the two tubes heat, the temperature of the aluminum tube is close to the melting point, the copper and aluminum began to combine, when the copper tube movement in place, cut off the welding circuit, to be combined with a solid copper and aluminum tubes, the end of the welding process. Figure 1 (c) gives a schematic diagram of the copper and aluminum pipe joint after welding. This welding method has many advantages, such as a wide bonding surface, high welding strength; easy to realize, low production costs; not subject to the overall shape of the pipe limitations; a good shape, beautiful appearance and so on. Practice has proved that this type of joint is particularly suitable for the refrigeration industry.