Industrial welding robot is an industrial robot engaged in welding (including cutting and spraying), which is used in the field of industrial automation. In order to adapt to different purposes, the mechanical interface of the last axis of the industrial welding robot is usually a connecting flange, which can be connected with different tools or end actuators. The industrial welding robot is to install welding tongs or welding tongs on the flange of the final shaft of the industrial robot Welding (cutting) gun, which can be used for welding, cutting or thermal spraying.
The requirement of spot welding for welding robot is not very high. Because spot welding only needs point position control, there is no strict requirement for the moving track of welding tongs between points, which is also the reason why robots can only be used in spot welding. The robot for spot welding should not only have enough load capacity, but also move quickly, stably and accurately to reduce the time of shifting
High efficiency. How much load capacity the spot welding robot needs depends on the type of welding tongs used. For welding tongs separated from the transformer, a robot with a load of 30-45 kg is sufficient. However, on the one hand, due to the length of the secondary cable, the power loss is large, which is also not conducive to the robot to extend the welding clamp into the workpiece for welding; on the other hand, the cable is constantly swinging with the robot movement, so the cable damage is fast. Therefore, at present, more and more integrated welding tongs are used. The weight of the welding tongs together with the transformer is about 70kg.
Considering that the robot should have enough load capacity and can send the welding tongs to the space position for welding with large acceleration, the heavy-duty robot with 100-150kg load is generally selected. In order to adapt to the requirements of short distance and rapid displacement of welding tongs during continuous spot welding. The new heavy-duty robot has the function of completing 50 mm displacement in 0.3 s. This puts forward higher requirements for the performance of the motor, the operation speed and algorithm of the microcomputer.