First, the application of robots in the automotive industry mainly focuses on the problems of spot welding, arc welding, spraying, and handling with low accuracy requirements. However, laser pointer cutting often requires very high position accuracy, and has high requirements for the accuracy of small trajectories such as small circles. The cutting of small circular holes with a diameter of less than 5mm is unmatched by ordinary robots, and cutting 10mm small circles will also Shapes such as ellipses appear; the efficiency of the initial robot is generally slower than the joint motion control of each axis of the robot, and the weight of the robot arm is too large to be suitable for high-speed movement; The traceability is poor, and the robot is deformed so badly that it cannot accurately reach the precise position to be cut in the target digital model. Therefore, it is understandable that robots popular in the traditional automotive industry are questioned by customers in laser cutting.
With a century of experience in precision machinery and high-speed motion control, Stäubli has the widest design field in the automotive industry. In response to the needs of the automotive industry, Stäubli realized the RX160L flip-chip gantry structure robot flexible cutting system solution in the laser field. The system has made breakthroughs in the following aspects:
1. Large-format robot wide format. Using RX160L robot, 2.05m spherical working area, the width of the cutting table can reach 3m, exceeding the width of the worktable of the expensive five-axis machine tool. The general automotive parts are all within the working area of the RX160L flip robot, and some large workpieces can also be used. This is achieved through mobile platforms.
2. The arm has light weight and good rigidity. Stäubli uses an integrally cast tubular structure to maintain rigidity; the material replaces aerospace cast aluminum with less deformation and lighter weight. The weight of the RX160L robot arm is only 250kg, while the robot with the same arm in Europe is more than 400kg, which is very unsuitable for the needs of robot flexible laser cutting.
3. The robot's mechanical accuracy is different. In addition to the size difference, the mechanical precision of the green laser pointer of the robot is the most important difference is the error of the mechanical transmission, and the error of the mechanical transmission is mainly reflected in the reducer. The deceleration system of general robots is very large, and they all use the ordinary reducer structure, and the gear gap is large, which cannot meet the needs of robot flexible laser cutting in the automotive industry. The unique patented deceleration system JCS used by Stäubli. This is why Stäubli Bier can be recognized by customers for small hole cutting.