ABB PFSA287 3BSE074213R1 Pneumatic System

PFSA287 3BSE074213R1 The actuator of the butt welder has linear motion in each movement. Considering the welding process, the clamping force and propulsion force are not very large, welding φ8 × 1 copper and aluminum pipe, the clamping force and propulsion force is about 1000N, using pneumatic system to achieve the copper and aluminum pipe clamping and propulsion. The advantages of pneumatic system are: the working medium is air, easy to obtain and discharge, do not pollute the environment, realize the green production; faster response than the hydraulic system, fast action; easy to realize the overload protection; gas pipeline for the plastic pipe, cutting, connecting are easy, and can withstand a certain degree of deformation. Figure 3 gives the overall schematic diagram of the copper and aluminum pipe butt welder actuator.

PFSA287 3BSE074213R1 copper and aluminum pipe butt welder is controlled by PLC to realize the coordinated action of each part to complete the welding process. Which the control of the cylinder must be completed through the solenoid valve. This must design the corresponding pneumatic system to meet the control requirements. Figure 4 gives a schematic diagram of the pneumatic system of the copper and aluminum pipe welding machine, PLC through two two four-way valve to control the action of the four cylinders. Solenoid valve PQ1 control clamping cylinder and positioning cylinder. Solenoid valve PQ2 control propulsion cylinder, throttle valve to adjust the propulsion speed. At the air source of the pneumatic system, there is a relief valve to limit the high air pressure, an air pressure switch to limit the low air pressure, and a pressure gauge to display the current air pressure value. Air pressure switch can be too low air pressure signal feedback to the PLC, indicating that at this time the clamping force, propulsion force are not enough to complete the copper and aluminum pipe welding.