Abstract: An auto-scraping apparatus for a work piece of a hard rail has a tracking device, a driving device and a tool device. The tracking device has a connecting frame, a moving frame, a lifting frame and a tool frame. The moving frame is movably connected to the connecting frame. The lifting frame is movably connected to the moving frame. The tool frame is rotatably connected to the lifting frame. The driving device is connected to the tracking device and has two linear motion units and a rotating motion unit. One of the linear motion units drives the moving frame and the other linear motion unit drives the lifting frame. The rotating motion unit is mounted in the tool frame and has a rotating shaft. The tool device is detachably connected to the driving device and has a tool carrier and a relieving tool.

Abstract: An auto-scraping apparatus for a work piece of a hard rail has a tracking device, a driving device and a tool device. The tracking device has a connecting frame, a moving frame, a lifting frame and a tool frame. The moving frame is movably connected to the connecting frame. The lifting frame is movably connected to the moving frame. The tool frame is rotatably connected to the lifting frame. The driving device is connected to the tracking device and has two linear motion units and a rotating motion unit. One of the linear motion units drives the moving frame and the other linear motion unit drives the lifting frame. The rotating motion unit is mounted in the tool frame and has a rotating shaft. The tool device is detachably connected to the driving device and has a tool carrier and a relieving tool.

Abstract: An auto-scraping apparatus for a work piece of a hard rail has a driving device, a linking device and a tool device. The driving device has a connecting frame, a driving motor and a cam. The driving motor is mounted in the connecting frame. The cam is mounted on a bottom of the connecting frame and has an abutting face. The linking device is connecting to the driving device and has a main frame, an upper connecting arm, a lower connecting arm, a linking arm and a rotating wheel. The main frame is connected to the driving motor. The connecting arms are pivotally connected to the main frame and the linking arm. The rotating wheel is rotatably mounted on the upper connecting arm and abuts the abutting face of the cam. The tool device is connected to the linking device and has a tool carrier and a relieving tool.