Fixed steel rail bottom welding seam grinding machine

The utility model provides a fixed type steel rail bottom welding seam grinding machine which comprises a motor, a handrail, a base, a supporting frame, a lifting device supported by the supporting frame, a grinding work head on the top of the lifting device, an upper sliding rail and a lower sliding rail, the lower sliding rail is horizontally fixed to the base, and a sliding device is arranged at the bottom of the supporting frame and used for horizontally sliding on the lower sliding rail. A horizontal upper sliding rail perpendicular to the lower sliding rail is fixed to the top of the supporting frame, a slidable lifting device is arranged on the upper sliding rail, a handrail is connected to the outer side of the lifting device, and a motor controls the lifting device. The machine body can slide forwards, backwards, leftwards and rightwards through two vertical horizontal rails of the upper sliding rail and the lower sliding rail, the lifting device adopts a three-point supporting ball screw, the liftin