Internal grinding machine for steel pipe

Abstract

The invention discloses an internal grinding machine for a steel pipe. The internal grinding machine comprises a rail, a first trolley and a second trolley, wherein the first trolley and the second trolley are arranged on the rail; a riding wheel for supporting and driving the steel pipe to rotate is arranged on the first trolley; a lifting column, a connecting piece and a sleeve connected with the connecting piece are arranged on the second trolley; a first rotating shaft is arranged in the sleeve; and the first rotating shaft is connected with a worm. The worm is meshed with a worm wheel; asecond rotating shaft penetrates through the worm wheel; the second rotating shaft is connected with the sleeve through a parallel beam sensor; and a clamping mechanism is further arranged in the sleeve. The axis of a grinding wheel is perpendicular to the axis of the first rotating shaft; the first rotating shaft only bears the bending moment on the vertical plane instead of the bending moment onthe horizontal plane; and the first rotating shaft is prevented from being bent on the vertical plane under the supporting effect of the sleeve. The parallel beam sensor can detect the pressure of the grinding wheel on the inner wall of the steel pipe, so that the right amount that the inner wall of the steel pipe is ground is got by using the grinding wheel; and the influence of overlarge pressure on the inner diameter of the steel pipe is avoided.

Description

technical field [0001] The invention belongs to the technical field of steel pipe production equipment, and relates to an internal grinding machine for steel pipes. Background technique [0002] The grinding of existing steel pipes generally uses manual grinding or simple mechanical grinding head grinding, which has low efficiency, high manual labor intensity, and obviously insufficient working conditions, which cannot meet the requirements of the era of high efficiency and high quality. In addition, the inner surface of steel pipes produced generally has defects such as scars, inner folds, thread lines, oxide scales, etc., which need to be polished. Steel pipes with smaller diameters can be processed by deep hole drilling machines, but the diameter is larger. Large steel pipes are more troublesome. [0003] At present, for the steel pipe internal grinding machine with larger diameter, it generally includes a track arranged on the ground, and a support trolley that can supp...

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Problems solved by technology

[0006] In view of the above problems, the present invention proposes an internal grinding machine for steel pipes, which well solves the problems in the prior art that the grinding wheel jumps under force, the rotating shaft bends, and the grinding amount of the grinding wheel cannot be controlled.

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