KR940703722A

KR940703722A - Reversible rolling control method of twin cross rolling mill

Info

Publication number: KR940703722A
Application number: KR1019940702370A
Authority: KR
Inventors: 유지 호리; 데쭈야 오가와
Original assignee: 다나까 미노루; 신니뽄 세이데스 가부시끼가이샤
Priority date: 1992-11-10
Filing date: 1993-11-10
Publication date: 1994-12-12
Also published as: GB9412120D0; SE9402305L; KR0148612B1; GB2278464B; SE9402305D0; SE505470C2; GB2278464A; WO1994011129A1

Abstract

쌍교차 압연기에서, 압연중에 발생되는 스러스트 하중의 영향을 받지 않는 참된 압연 실적치 및 좌우측 하중간의 하중차가 계산되고, 검출치 및 계산치에 기초하여 판두께 제어 및 웨지 제어가 학습수정된다. 사전에 결정된 판 크라운을 달성하기 위하여, 실적 판크라운이 예측되고 실시간으로 계산되어 피드백 제어를 수행한다. 패스가 종료되면, 이전 패스의 실적 롤 굽힘량은 다음 패스 및 후속하는 패스의 교차각 설정치에 반영되고, 교차각 설정치는 학습되고 갱신된다. 또한, 각 패스의 압연형상 및 설비능력의 확보를 만족시키는 기계적 크라운의 범위가 계산되고, 패스일정이 결정됨으로써 최단의 패스 수를 얻게 된다.In a twin-cross mill, the load difference between the true rolling performance value and the left and right loads unaffected by the thrust load generated during rolling is calculated, and the plate thickness control and wedge control are learned and corrected based on the detected value and the calculated value. In order to achieve a predetermined plate crown, the historical pan crown is predicted and calculated in real time to perform feedback control. At the end of the pass, the historical roll bending amount of the previous pass is reflected in the crossing angle setpoints of the next pass and subsequent passes, and the crossing angle setpoints are learned and updated. In addition, the range of the mechanical crown which satisfies the rolling shape of each pass and securing the facility capability is calculated, and the path schedule is determined to obtain the shortest number of passes.

Description

Reversible rolling control method of twin cross rolling mill

본 내용은 요부공개 건이므로 전문내용을 수록하지 않았음Since this is an open matter, no full text was included.

제 1 도는 본 발명이 적용되는 압연기의 일예의 개요를 보인 정면도, 제 5 도는 본 발명의 일실시예의 압연기 및 제어기의 구성요소를 보인 블록도, 제 6 도는 제 5 도에 도시한 가역압연기의 기구개요를 보인 측면도.1 is a front view showing an outline of an example of a rolling mill to which the present invention is applied. FIG. 5 is a block diagram showing components of a rolling mill and a controller of an embodiment of the present invention. FIG. 6 is a view of the reversible rolling mill shown in FIG. Side view showing the mechanism outline.

Claims

In the rolling by a rolling mill which performs reversible rolling by relatively intersecting a roll set each consisting of a pair of backup rolls and a work roll arranged in a plane parallel to the rolled material, the load cell and the shaft of the roll load detection for up, down, left and right Using the detection value of the load cell to detect the thrust load generated in the direction, the true rolling performance load and the left and right load difference which are not affected by the thrust load are calculated, and the plate thickness is automatically based on these detected values and the calculated value. And a wedge for controlling automatic sheet thickness in reversible rolling.

In rolling by a rolling mill each consisting of a pair of back-up rolls and work rolls arranged in a plane parallel to the rolled material and performing reversible rolling by relatively crossing a roll set including a roll bending controller at both ends of the roll, In order to achieve a predetermined plate crown in order to flatten the final shape, the actual plate crown is calculated in real time according to the rolling load variation in the plate, roll bending control is performed, and the roll roll amount of the previous pass at the end of the pass. And the plate crown calculation amount is corrected and reflected in the intersection angle set values of the next pass and the subsequent pass to control the shape of the plate.

In rolling by a rolling mill each consisting of a pair of back-up rolls and work rolls arranged in a plane parallel to the rolled material and performing reversible rolling by relatively crossing a roll set including a roll bending controller at both ends of the roll, each pass When modifying the roll bending amount according to the exit shape of, the shape prediction value of the path is corrected from the roll bending performance amount of the path, the plate crown prediction value is corrected, and the mechanical crown targeted in the next pass and subsequent passes. An automatic plate thickness control method in reversible rolling, characterized in that the quantity is recalculated and reflected in the crossing angle set value to control the shape of the plate.

In rolling by a rolling mill which performs reversible rolling by relatively intersecting a roll set each consisting of a pair of backup rolls and work rolls arranged up and down in a plane parallel to the rolling material, the crossing angle of the rolls in the end pass is minimized. Calculate the area that satisfies both the mechanical crown tolerance determined from the shape of each pass and the mechanical crown tolerance determined from the facility capability, and sequentially determine the maximum allowable rolling load. To determine the thickness of the plate, and to simultaneously determine the reduction of the shortest number of passes and the angle of intersection satisfying the shape.

※ Note: The disclosure is based on the initial application.