The invention discloses an internal
grinding machine for steel pipes, which comprises a track, a first trolley and a second trolley arranged on the track, the first trolley is provided with supporting wheels for supporting and driving the steel
pipe to rotate, and the second trolley is provided with The lifting column, the connecting piece, and the sleeve connected with the connecting piece, the sleeve is provided with a first rotating shaft, the first rotating shaft is connected with a worm, the worm is meshed with a worm wheel, the worm wheel is threaded on the second rotating shaft, and the second rotating shaft The shaft is connected to the sleeve through a
parallel beam sensor, and a clamping mechanism is also arranged in the sleeve; the axis of the
grinding wheel of the present invention is perpendicular to the axis of the first rotating shaft, and the first rotating shaft is only subjected to the
bending moment on the
vertical plane, and It will not be subjected to the
bending moment on the horizontal plane, and under the action of the support of the sleeve, the bending of the first rotating shaft on the
vertical plane is avoided; and the
parallel beam sensor can detect the pressure of the
grinding wheel on the inner wall of the steel
pipe, so that the
grinding wheel The inner wall of the steel
pipe has a suitable amount of grinding to avoid excessive pressure affecting the size of the inner
diameter of the steel pipe.