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Application research of internal spray door opening robot
Painting is a crucial component of the four major processes in automobile manufacturing. With the rapid growth of China's automotive industry in recent years, internal surface painting has become increasingly important, and robotic systems have been widely adopted in car painting lines. As a global leader in robotics, FANUC offers mature robot solutions and advanced technologies specifically for internal surface coating applications.
The P-20iB is a specialized door-opening robot developed by FANUC, designed to handle internal surface painting tasks efficiently. It features a 3-axis configuration, allowing it to be installed either on the ground or on rails, making it adaptable to different coating line requirements such as stop-and-go operations and conveyor tracking.
To meet diverse customer needs, the P-20iB can be equipped with various types of door-opening devices. One common option is the pin-type opener, which grasps the workpiece by contacting the window of the door panel. A mechanical displacement sensor triggers during the pressing process to determine if the grip was successful.
Another innovative solution is the magnetic hammer-type door opener, a next-generation device developed by FANUC. This system uses a magnet to suction the inside of the door panel, and an optical fiber sensor detects the position of the magnet to confirm successful gripping. When releasing the workpiece, compressed air is used to detach the magnet from the surface, ensuring a smooth and controlled release.
Compared to the pin-type opener, the magnetic hammer-type design does not directly touch the workpiece during the gripping process, minimizing any force applied to the surface. This reduces the risk of paint damage or misalignment, preserving the quality of the finished product.
As automotive designs continue to evolve rapidly, more manufacturers are incorporating door-opening mechanisms into new models. The P-20iB robot’s unique 2- and 3-axis bi-directional bending design provides an ideal solution for flexible internal spray stations. It not only lowers customer investment costs but also supports the development of new models by offering a versatile production platform.
In terms of software, the P-20iB comes pre-installed with FANUC's specialized painting software, PaintTool. This tool significantly simplifies the programming process, reducing both installation and debugging time, while also lowering the complexity of maintenance and secondary development for customers.
During operation, inserting the StartPartCheck subroutine allows the robot to identify and monitor the workpiece in real-time. Similarly, using the StopPartCheck command enables the robot to release the workpiece and deactivate the monitoring function.
Through the application of the P-20iB robot, FANUC’s internal spray system demonstrates flexibility and adaptability, helping to drive the continued growth and innovation of the Chinese automotive industry.