公开(公告)号：US4460118A

公开(公告)日：1984-07-17

申请号：US383197

申请日：1982-05-28

申请人： Matsuo Ataka ,  Itaru Aoki ,  Takashi Horita ,  Takehisa Nagao

发明人： Matsuo Ataka ,  Itaru Aoki ,  Takashi Horita ,  Takehisa Nagao

IPC分类号： B21C37/08 ,  B21C37/083 ,  B21D5/12 ,  B23K31/06 ,  B21D39/03

CPC分类号： B21C37/083 ,  B21C37/0822

摘要： In a method for roll forming a flat metal strip through a roll forming machine into a round tubular product while the metal strip is being lengthwise fed therethrough, an improved method wherein regions of a specified width extending inward from the edges of said strip are imparted with substantially zero curvature. The tube forming method prevents decrease in the wall thicknesses at the edges when used in the manufacture of a thick walled electric welded pipe, and prevents the occurrence of edge buckling and springback when used in the manufacture of thick walled pipe so that in either case a proper and satisfactory butt junction for subsequent welding can be obtained.

摘要翻译： 在通过辊成型机将扁平金属条轧制成圆筒形产品同时金属带纵向进给的方法中，提出了一种改进的方法，其中从所述带的边缘向内延伸的特定宽度的区域被赋予 基本上零曲率。 管形成方法防止在制造厚壁电焊管时用于边缘处的壁厚减小，并且在用于制造厚壁管时防止边缘屈曲和回弹的发生，使得在任一种情况下 可以获得用于后续焊接的适当且令人满意的对接接头。

公开(公告)号：US4528834A

公开(公告)日：1985-07-16

申请号：US600282

申请日：1984-04-13

申请人： Koshiro Aoyagi ,  Yukio Noguchi ,  Koe Nakajima ,  Matsuo Ataka

发明人： Koshiro Aoyagi ,  Yukio Noguchi ,  Koe Nakajima ,  Matsuo Ataka

IPC分类号： B21B1/16 ,  B21B1/18 ,  B21B41/00 ,  B21B45/02

CPC分类号： B21B1/18

摘要： Bars and wire rods are rolled from billets or blooms in the disclosed process which includes a primary rolling step resulting in an intermediate material, a secondary rolling step and a heat treatment. The primary (first) rolling step includes rolling the billet or bloom steel material into an intermediate material at a mass flow rate to enable it to be maintained during the primary rolling within a temperature range corresponding to a predetermined deformation resistance level of the steel material. This predetermined deformation resistance level is selected so as to take advantage of an opportunity to save energy. The intermediate material resulting from primary rolling is coiled and its temperature is adjusted so as to maintain the intermediate material at a desired starting temperature for the secondary rolling step. The desired starting temperature for secondary rolling is related to a desired starting temperature for the heat treatment following the secondary rolling enabling heat treatment to be carried out in line.

摘要翻译： 在公开的方法中，棒材和线材从坯料或花纹中轧制，其包括产生中间材料的初步轧制步骤，二次轧制步骤和热处理。 主要（第一）轧制步骤包括以质量流量将坯料或坯料钢材轧制成中间材料，以使其能够在对应于钢材的预定变形阻力水平的温度范围内的一次轧制期间保持。 选择该预定的变形阻力水平以利用节省能量的机会。 由一次轧制得到的中间材料进行卷绕，并调节其温度，以便将二次轧制步骤的中间材料保持在期望的起始温度。 二次轧制的期望的起始温度与二次轧制之后的热处理所需的起始温度有关，使得能够进行热处理。

公开(公告)号：US4307595A

公开(公告)日：1981-12-29

申请号：US99726

申请日：1979-12-04

申请人： Michio Nishikubo ,  Sei Miura ,  Kouki Nanbu ,  Matsuo Ataka

发明人： Michio Nishikubo ,  Sei Miura ,  Kouki Nanbu ,  Matsuo Ataka

IPC分类号： B21B1/02 ,  B21B1/04 ,  B21B1/16 ,  B21B1/18 ,  B21B1/26 ,  B21B3/00 ,  B21B37/52 ,  B21B39/00 ,  B21B39/06 ,  B21B39/14 ,  B21B39/16 ,  B21B1/00

CPC分类号： B21B37/52 ,  B21B1/16 ,  B21B1/18 ,  B21B1/04 ,  B21B1/265 ,  B21B2001/022 ,  B21B2003/001 ,  B21B2003/005 ,  B21B2265/10 ,  B21B2273/08 ,  B21B39/006 ,  B21B39/06 ,  B21B39/14 ,  B21B39/165

摘要： A metal workpiece is rolled in a rolling mill, including an upstream rolling stand or pinch rolls and more than one stream rolling stand. The roll gaps of the workrolls of the downstream rolling stand are set so that the eqivalent contact angle .theta.e (.theta.e=tan.sup.-1 (cos .alpha..times.tan .theta.) wherein .theta. denotes the contact angle between the workrolls in the bottom of the roll groove and the workpiece and .alpha. denotes the inclined angle of the groove) is larger than tan.sup.-1 .mu. (.mu. denotes a coefficient of friction between the workpiece and the workrolls at the time of biting therebetween and also is smaller than tan.sup.-1 .mu.' (.mu.' denotes a coefficient of friction between the workpiece and the workrolls when the workpiece is completely bitten between the workrolls and the rolling operation is in progress). The workpiece is fed to the downstream rolling stand by the upstream rolling stand or the pinch rolls by causing a compressive stress, which is below the yield stress at the rolling time, on the workpiece in a direction along the rolling line which is located between the upstream rolling stand or pinch rolls and the downstream rolling stand.

摘要翻译： 金属工件在轧机中轧制，包括上游轧制机架或夹送辊和多于一个流动轧制机架。 设定下游轧制机架的轧制间隙，使得等效接触角θe（θe = tan -1（cosαx tan theta））其中θ表示辊槽底部的工作辊之间的接触角 并且工件和α表示槽的倾斜角）大于tan-1 mu（μ表示在咬合之间工件和工件之间的摩擦系数，并且还小于tan -1 mu'（ mu'表示当工件被完全咬合在工件之间并且轧制操作正在进行时工件与工件之间的摩擦系数），通过上游轧制机架或夹送辊将工件供给到下游轧制机架 导致在轧制时的轧制时的屈服应力低于沿着轧制线的方向的工件在位于上游轧制机架或夹送辊之间的压缩应力 wnstream轧机架。