| 摘要 |
<p>PURPOSE:To obtain a rolling method for a welded part by a continuous cold mill which can prevent the welded part from breaking. CONSTITUTION:An amount of undergage of a plate thickness on the outlet side of a final stand is estimated and when this amount does not arrive at a reference value, a correction is added to a prescribed area, a feedforward(FF) AGC10 at the neighborhood where the welded part passes the 1st stand thickness gage 4 and controlled. When the amount of undergage exceeds the reference value, the operations of the gage AGC 9 and a monitor AGC 8 are stopped at a time when the welded part have arrived at a prescribed position before the 1st stand 1a and the roll gap of the 1st stand is opened by a prescribed amount and when the welded part passes the 1st stand, the roll gap is closed by the correction. The control of the (FF)AGC is stopped in the welded part between a prescribed position before the 1st stand thickness gage and the passed point of the thickness gage and the (FF)AGC is reopened when the welded part passes the thickness gage and the gage AGC is reopened when the roll gap of the 1st stand returns to the origin.</p> |
