摘要:
PURPOSE: A width rolling method of a reversible hot rolling mill is provided to increase the width variable range and decide a width rolling reduction at the pass of the exit side of a roughing mill which reaches to a target width of the rough rolling by carrying out at the exit side of the roughing mill also the width rolling method that is performed only in the reversible hot rolling process including a width rolling mill. CONSTITUTION: The width rolling method comprises the step of first step (21) of judging whether or not a width variable quantity rolled exceeds an ordinary maximum width variable quantity; second step (22 - 25) of setting the number of width rolling pass at the exit side of a horizontal rolling mill and the initial width rolling reduction; third step (26 - 28) of calculating a dog bone width recovery quantity and an exit side width of the rough rolling considering the total rolling reduction of the subsequent pass; and fourth step (29 - 33) of conforming a width of the rough rolling terminating pass with a target width so as to derive a width rolling reduction for the width rolling pass of the exit side of the horizontal rolling mill.
摘要:
본 발명은 업세팅 처리되고 이어서 조압연기열 및 다듬질 압연기열을 통과하는 얇은 스트랜드로부터, 또는 매우 두껍거나 중간 정도의 두께를 갖는 연속 주조 슬래브로부터 강 소재의 평판 제품을 제조하기 위한 방법에 있어서, 평판 제품이 업세팅 공정 전에 자체의 스트립 가장자리에서 스케일 제거되는 것을 특징으로 하는 상기 제조 방법에 관한 것이다. 본원의 제조 방법은 적어도 하나의 제1 업세팅 장치(1)와, 조압연기열과, 다듬질 압연기열을 포함하는 압연기열에서 실시된다. 압연기열은, 제1 업세팅 장치(1)의 전방에 평판 제품의 스트립 가장자리에서 스케일 제거하기 위한 제1 디스케일링 장치(2)가 배치되는 것을 특징으로 한다.
摘要:
PURPOSE: An apparatus for preventing distortion of slab in roughing mill is provided to improve product quality and prevent facility accident by correcting guide panel and touch roller in such a manner that slab is not transferred in a twisted shape, thereby accurately leading in the slab to the next rolling process. CONSTITUTION: The apparatus comprises an edger roller(3) for rolling width of the slab(1); a center guide part(10) positioned on a rear surface of the slab(1) passing through the edger roller(3) and ascended and descended to guide and support the slab(1) when the slab(1) is proceeded in a twisted shape; guide roller parts(20) positioned in front and rear of the center guide part(10) and ascended and descended in ascent and descent directions of the center guide part(10) for guiding the slab(1); and a control part for controlling ascent and descent speed of the guide roller parts(20) and center guide part(10) to a proper ratio.
摘要:
PURPOSE: A device for measuring interval between edge rolls using ultrasonic waves is provided to prevent damage of sensors due to high temperature, moisture and vibration, a stop of operation, frequent demands for maintenance and frequent measurements and to improve accuracy and actual utility. CONSTITUTION: A device for measuring interval between edge rolls using ultrasonic waves includes an edger roll supporting rod measuring unit (44) mounted at a fixed side (41) for measuring interval of edger roll housing (42), and an underwater ultrasonic wave sensor (45) mounted at the center of the edger roll housing (42) for measuring distance from the housing to an edger roll (40) and diameters of the edger roll. The edger roll supporting rod measuring unit has telescopic cylindrical pipes having different diameters and a variable resistor connected to a wire drum shaft for showing the change of length of a wire wound on a wire drum into the change of linear resistance.