the fourth generation intelligent CNC corner cleaning machine is a special equipment that are used to clean PVC window-doors welding slag at 90 angle seam. this machine adopts industrial computer as hardware pivot, and human-machine interface touch display screen of LED liquid crystal is utilized. Equipped with exclusive corner cleaning software developed by our company (operation system supports Chinese and English version) It can finish a comprehensive cleaning, including the opposite side of welding corner, the slope and the ellipse arc of external corner, the upper and the lower planar welding seam, interior planar welding seam of inner angle, sealing strip groove and internal planar welding seam. According to different profiles, it can be set to store more than 100 types of corner cleaning programs. It has the following advantages: perfect function, easy operation, high speed, high accuracy, high efficiency and high degree of automation. It is a high-end, practical corner cleaning equipment that can be used for PVC window-doors processing in large and medium scale enterprises.