JPS5861901A - Rolling method - Google Patents

Abstract

PURPOSE:To increase the rate of gnawing with small rolling energy of a small diameter roll and to improve production efficiency, by providing a slope wherein thickness decreases toward an upper stream side to the succeeding end of a rolled material and gnawing the thin part thereof in the next pass. CONSTITUTION:In the stage of rolling, the gnawing in the first pass of a rolled material S is accomplished by rolling at a required rolling reduction similar to that in ordinary rolling. When the succeeding end of the material S goes near work rolls 1 on progression of the rolling, a lower backup roll 2 and the work roll 1 are moved quickly upward before the tail end passes therethrough and an upper backup roll 2 and the roll 1 are moved downward quickly to provide a slope wherein the thickness is smaller the nearer the succeeding end side is provided to the material S. In the 2nd pass, the space between the rolls 1 and 1 is set at a prescribed space, and the material is rolled with the sloped side at the top. Before the tail end thereof passes through said rolls, a slope is provided to the succeeding end in the same manner as in the 1st pass. In the same manner, the material is subjected to reverse rolling and in the case of finish rolling, no slopes are provided to the material.

Description

【発明の詳細な説明】 本発明は、圧延エネルギーを減少させると同時に噛み込
み量を大きくし得るようにした圧延方法に関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a rolling method capable of reducing rolling energy and increasing the amount of biting at the same time.

第１図に示すごとく、径Ｄ１の小径の作業ロール（ａ）
で圧延材（Ｓ）をＨからみに圧延した場合の圧延エネル
ギーは、第２図に示すごとく、径Ｄ２の大径の作業ロー
ル（α１で同様に圧延した場合の圧延エネルギーより小
さい。これは圧延材（Ｓ）と作　□業ロールの接触弧長
１．がｔ２より小さいためである。しかし、大径の作業
ロール（ｄ）の場合、噛み込み量ΔＩ（−１１−Ａを大
きび取ることができるが、小径の作業ロールｆａ）の場
合は、噛み込み量を大きく取ると、噛み込み時に作業ロ
ールが空転し、圧延が不可能にな２てしまう。As shown in Figure 1, a small diameter work roll (a) with a diameter of D1
As shown in Fig. 2, the rolling energy when the rolled material (S) is rolled in the H direction is smaller than the rolling energy when the rolled material (S) is rolled in the same manner using a large-diameter work roll (α1) with a diameter of D2. This is because the contact arc length 1. between the material (S) and the work roll is smaller than t2.However, in the case of a large diameter work roll (d), the biting amount ΔI (-11-A must be increased). However, in the case of a small-diameter work roll fa), if the biting amount is large, the work roll will idle during biting, making rolling impossible.

本発明の目的は圧延エネルギーが小さく、シかも噛み込
み社を大きく取り得るようにした圧延方法を提薄い部分
を噛み込まずことにより、勾配のない場合に噛み込めな
いような板厚の板を圧延することを特徴とするものであ
る。The purpose of the present invention is to provide a rolling method that requires less rolling energy and can increase the amount of traction, thereby preventing the thinner parts from being erected, thereby producing a plate with a thickness that would not be latched when there is no slope. It is characterized by rolling.

以ド、本発明の実施例を図面を参照しつつ説明する。Hereinafter, embodiments of the present invention will be described with reference to the drawings.

第３図（イ）〜（−）中（１）は小径の作業ロール、（
２）は控ロ　−ルである。圧延に際しては１パス目の圧
延材＋Ｓ）の噛み込みは通常の圧延と同様に行ない、第
３図（イ）に示すごとく所要の圧丁量の圧延を行うが、
圧延が進行して圧延材（Ｓ）の後端が作業ロール（１）
に近付いたら、尻り抜は前に第３図（ロ）に示すごとく
下の控ロ　−ル及び作業ロールを急速に上昇させると共
に上の控ロール及び作業ロールを急速に下降せしめ、第
６図Ｈに示すごとく圧延材（Ｓｌに、後端側に行くほど
板厚が薄い勾配を付する。In Figure 3 (a) to (-), (1) is a small diameter work roll, (
2) is a backup roll. During rolling, biting of the rolled material +S) in the first pass is carried out in the same manner as in normal rolling, and rolling is performed to the required amount of cutting as shown in Fig. 3 (a).
As rolling progresses, the rear end of the rolled material (S) becomes the work roll (1)
When approaching the bottom, the lower backing roll and work roll are rapidly raised as shown in Figure 3 (b), and the upper backing roll and work roll are rapidly lowered, as shown in Figure 6 (b). As shown in H, a gradient is applied to the rolled material (Sl) so that the plate thickness becomes thinner toward the rear end side.

２パス目は第３図に）に示すごとく、作業ロール（１）
　（１１の間隔を所定の間隙に変更し、勾配を付した側
を先頭にして圧延を行ない、尻り抜は前に１パス目と同
様ロールを急速圧下し、後端側に勾配を付する。In the second pass, as shown in Figure 3), the work roll (1)
(Change the interval in step 11 to a predetermined gap, roll with the sloped side at the beginning, and roll down the roll quickly as in the first pass for bottom removal, and apply a slope to the rear end side. .

以下同様にしてリバース圧延を行うが、仕上圧延の場合
は勾配を付さない。Thereafter, reverse rolling is performed in the same manner, but no slope is applied in the case of finish rolling.

上述したごとく尻り抜は前に圧延材に勾配を付すること
により、小径ロールでも噛み込み楡を大きく取ることが
でき、しかも小径ロールな９で圧延エネルギーも小さい
。As mentioned above, by applying a slope to the rolled material before removing the tail, it is possible to obtain a large biting edge even with a small-diameter roll, and the rolling energy is also small with the small-diameter roll 9.

なお、本発明の実施例においては、勾配を付するときに
下のロールを上昇させると共に上のロールを下降させる
場合について説明したが、下のロールを急速上昇させる
たけでも、あるいは上のロールを急速下降させるだけで
もよいこ種々変更を加え得ること、等は勿論である。In addition, in the embodiments of the present invention, the case where the lower roll is raised and the upper roll is lowered when applying a slope has been described, but it is also possible to raise the lower roll rapidly or lower the upper roll. It goes without saying that various changes can be made, such as simply descending rapidly.

本発明の圧延方法によれば、圧延エネルギーが少なくて
よいから省エネルギーに貢献し、噛み込み量を大きく取
ることができるから生産能率が向上する、等種々の優れ
た効果を奏し得る。。According to the rolling method of the present invention, various excellent effects can be achieved, such as contributing to energy saving because less rolling energy is required, and improving production efficiency because the amount of biting can be increased. .

【図面の簡単な説明】[Brief explanation of drawings]

第１図及び第２図は通常の圧延方法の説明図、第３図（
イトに）は本発明の圧延方法の説明図である。 図中（１）は作業ロール、（２）は控ロール、（Ｓ）は
圧延材を示す。 特許出願人 石川島播磨重工業株式会社 第１図 第２図 ゛　ｌFigures 1 and 2 are explanatory diagrams of the normal rolling method, and Figure 3 (
Fig. 1) is an explanatory diagram of the rolling method of the present invention. In the figure, (1) shows a work roll, (2) shows a backing roll, and (S) shows a rolled material. Patent applicant Ishikawajima Harima Heavy Industries Co., Ltd. Figure 1 Figure 2

Claims (1)

【特許請求の範囲】[Claims] １）圧延材進行方向後端側に、進行方向に対し上流側に
向って板厚の薄くなる勾配を付すると共に、進行方向の
逆である次パス噛み込みにおいてこの薄い部分を噛み込
まずことにより、勾配のない場合に噛み込めないような
板厚の板を圧延することを特徴とする圧延方法。1) Add a slope to the rear end of the rolled material in the direction of travel, where the plate thickness becomes thinner toward the upstream side with respect to the direction of travel, and avoid biting this thin part in the next pass that is opposite to the direction of travel. A rolling method characterized by rolling a plate of such thickness that it cannot be rolled if there is no slope.