Rolling mill for rectangular steel tubes

Abstract

The invention discloses a rolling mill for rectangular steel tubes. The rolling mill comprises a base; the base is fixedly provided with a left rack and a right rack; a top roll, a bottom roll, a left roll and a right roll are respectively arranged on the left rack and the right rack; the rolling mill also comprises an arched adjusting bracket and a cross beam connected with the upper end of the left rack and the upper end of the right rack; U-shaped chutes are respectively formed in the left rack and the right rack; two ends of the arched adjusting bracket are respectively arranged in the U-shaped chutes, and are in vertical sliding fit with the U-shaped chutes; the middle part of the arched adjusting bracket is provided with a lifting rod in screw-thread fit with the cross beam. According to the rolling mill disclosed by the invention, by connecting the cross beam with the left rack and the right rack, the racks form a rectangular frame structure on the whole; the racks are high in rigidity, so that the problem that the existing racks vibrate during rolling can be avoided; moreover, the arched adjusting bracket is connected with the left end and the right end of the top roll, and the top roll is adjusted to rise or fall through the lifting screw rod, so that the roll is convenient to adjust, the adjustment time is short, and the work efficiency is high.

Description

technical field [0001] The invention relates to rolling equipment, in particular to a rolling mill for rolling rectangular steel pipes. Background technique [0002] The rectangular steel pipe rolling mill includes a left frame and a right frame, and the upper roll, the lower roll, the left roll and the right roll are respectively arranged on the left frame and the right frame. [0003] In the prior art, the left frame and the right frame of the rectangular steel pipe rolling mill are separated from each other, and the frame as a whole has a U-shaped structure, which has poor rigidity and is easy to vibrate during the rolling process, resulting in poor surface quality of the steel pipe. And when adjusting the upper and lower positions of the upper roll, it is necessary to adjust the screw rods on the left frame and the right frame simultaneously, which has poor adjustment convenience and takes a long time to adjust. Contents of the invention [0004] In view of this, the ...

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Problems solved by technology

[0004] In view of this, the object of the present invention is to provide a rectangular steel pipe rolling mill to solve the problems of poor frame rigidity and poor roll adjustment convenience in the prior art.

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