Pressing mechanism for seaming steel pipes

Abstract

The invention discloses a pressing mechanism for seaming steel pipes. A first pressing roller, two second pressing rollers and two third pressing rollers are arranged on a pressing roller fixing seat; the first pressing roller is arranged at the middle position of the top of the pressing roller fixed seat; the second pressing rollers are arranged at two sides of the top of the pressing roller fixed seat and form included angles alpha of 45 degrees with the horizontal direction; the ratio of the width L1 of a first circular rolling wheel to the width L2 of a second circular rolling wheel is 7:6; the third pressing rollers are arranged at the bottom of two sides of the pressing roller fixed seat and form included angles beta of 17 degrees with the horizontal direction; each third pressing roller comprises a roller row and a bearing bracket; multiple pressing roller are arranged in the groove in the bottom of the bearing bracket; the pressing rollers are arranged through two circular truncated cone-shaped rolling wheels and form a structure which is concave in the middle and convex in two ends; and the other ends of the third pressing rollers are connected with a hydraulic oil cylinder. From multiple aspects, multiple pressing rollers are used for pressing, pressing deformation of the steel pipes can be effectively avoided; and the pressing effect is improved and the production efficiency of an enterprise is greatly improved.

Description

technical field [0001] The invention relates to a pressing mechanism, in particular to a pressing mechanism used for jointing of steel pipes. Background technique [0002] At present, most of the large-diameter steel pipes are made of single steel plates, which need to be fixed by spot welding after forming a cylinder to prepare for the welding process. Before spot welding, since the middle seam is left when the steel pipe is reeled, it is necessary to close the seam of the steel pipe. When the seaming machines at the present stage are used to seam steel pipes, most of them use pressing rollers to press from three directions: top, left and right. During use, it is found that pressing from only three directions will cause steel pipes to Due to uneven force, the process of pressing may cause deformation of the steel pipe, and the pressing effect is not good, which reduces the production efficiency of the enterprise. Contents of the invention [0003] The technical problem ...

AI Technical Summary

Problems solved by technology

When the seaming machines at the present stage are used to seam steel pipes, most of them use pressing rollers to press from three directions: top, left, and right. During use, it is found that pressing from only three directions will cause steel pipes to Uneven stress, the pressing process may cause steel pipe deformation, the pressing effect is not good, reducing the production efficiency of the enterprise

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