On-line roller distance dynamic fine adjusting device

Abstract

The invention discloses an on-line roller distance dynamic fine adjusting device, belongs to the technical field of oblique rolling, and relates to a two-roller seamless steel tube rolling mill. The problems that after a steel tube passes a stretch reducing mill, the longitudinal wall thickness precision is low, and the loss of the crop end is serious are solved. The on-line roller distance dynamic fine adjusting device comprises a rotating device fixed into a shell, a rotating friction pair and a quick-opening oil cylinder. The rotating friction pair is composed of a rotating ring and a static ring, wherein the end face of the rotating ring is a spiral face. The rotating device rotates in the shell through a bearing, and the rotating ring is fixed to the tail end face of the rotating device. The quick-opening oil cylinder is fixed into the shell through limiting keys and can only move back and forth along the axis. The static ring is fixed to a cylinder of the quick-opening oil cylinder, and the end face of the rotating ring and the end face of the static ring are coaxially and oppositely installed. A common hydraulic system and an electric control system are adopted, a hydraulic and control system is simplified, the investment of the device is reduced, and the reliability, simplicity and convenience of device running are improved.

Description

technical field [0001] The invention belongs to the technical field of cross rolling, and relates to a two-roller seamless steel pipe mill, in particular to an on-line dynamic fine-tuning device for roll spacing used in a two-roller cross-rolling seamless steel pipe mill. technical background [0002] The hot-rolled seamless steel pipe production technology is a technology that processes solid pipe blanks into seamless steel pipes through the processes of heating, piercing, mill rolling, sizing, and straightening. The traditional two-roll seamless steel pipe rolling mill does not have the on-line Adjustment function, in the process of rolling steel pipes, there will be a phenomenon that the wall thickness of the steel pipe head and tail is out of tolerance, resulting in the increase of the length of the head and tail, which directly affects the yield of the steel pipe. [0003] In order to solve the above-mentioned problems existing in the prior art, the present invention de...

AI Technical Summary

Problems solved by technology

[0004] The present invention provides an online dynamic fine-tuning device for roll spacing in order to solve the problems of low longitudinal wall thickness accuracy and serious head-to-tail loss of steel pipes after passing through a stretching and reducing machine.

The device adopts the principle of mechanical amplification to solve the problem of online dynamic and accurate control of roll distance

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