The machine is used for PVC door and window corner welding seam cleaning.It can clean corner seam welding tumer on top ,bottom and vertical surfaces.By changing different formed cutters,it can clean welding seam of profile with dirrerent sections.It features program control,pneumatic drive,and floating modulated pressure pulling-cutter devices and is suitable for different levels of porofiles.It is the necessary equipment for mass batch door and window processing.