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公开(公告)号：US4190887A
公开(公告)日：1980-02-26
申请号：US878169
申请日：1978-02-15
CPC分类号： B21B17/08
摘要： A press roll piercing method wherein a polygonal billet is pushed in the axial direction thereof between a pair of driven rolling rolls mounted one above the other and a piercing plug is supported in the center of the pass by a mandrel, is improved by selecting a pushing force of a predetermined value which corresponds to a stress above the yield stress of the billet at the starting of the piercing although the actual stress occurring at the starting of the piercing may or may not exceed the yield stress by selecting the pushing speed and/or the peripheral speed of the rolls such that the volume of the billet pushed in per unit time and the volume of the hollow shell discharged from the rolling rolls become substantially equal, whereby the billet is positively gripped by the rolling rolls.
摘要翻译： 一种挤压辊穿孔方法，其中多个坯料在轴向上被推动在一对彼此上下安装的一对从动轧辊和穿孔塞之间，通过心轴被支撑在通道的中心，通过选择推动 对应于在穿刺开始时坯料的屈服应力以上的应力的预定值的力，尽管在开始开始时产生的实际应力可以通过选择推进速度和/或 轧辊的圆周速度使得每单位时间推入的坯料的体积和从轧制辊排出的中空壳的体积基本相等，由此轧辊能够正确地夹持坯料。
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公开(公告)号：US4052874A
公开(公告)日：1977-10-11
申请号：US706563
申请日：1976-07-19
CPC分类号： B21B17/08
摘要： A method of producing a cylindrical metallic tubular body in a press roll piercing mill. The method involves applying a pressing force to a polygonal metal billet in the axial direction thereof while guiding the billet by means of a guide during its advance, rolling corner portions of the billet to a certain degree with a pair of rolling rolls having semicircular grooves disposed above and below the billet prior to the contacting of a plug with the center of the front end surface of the billet, and successively piercing the billet by means of the plug while the billet is rolled, the tip portion the plug being retained on the pass center line by the rolling rolls.
摘要翻译： 一种在压辊穿孔机中制造圆筒形金属管状体的方法。 该方法包括在多边形金属坯料的轴向方向上施加按压力，同时通过一对具有半圆形槽的轧制辊将坯料的前进滚动角部分引导到导向件 在塞子与坯料的前端表面的中心接触之前和之下的坯料上方和下方，并且在坯料被轧制的同时通过塞子连续地刺穿坯料，所述塞子保持在通道上 中心线由轧辊。
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公开(公告)号：US4006618A
公开(公告)日：1977-02-08
申请号：US597812
申请日：1975-07-21
摘要： In a method of producing seamless steel tube from billet having a square or rectangular cross-section by the step of piercing a workpiece and rolling steps following the piercing step, each of such steps being conducted with a plug held by a mandrel toward the center of cross section of the workpiece while the workpiece is rolled by a pair of rolls with axes arranged horizontally. The piercing step includes guiding the workpiece by a plurality of pairs of guide rolls provided along the rolling line ahead of the rolling rolls as the billet is forced therethrough to maintain the billet in such a position that the hollow shell will not have any nonuniformity of wall thickness and piercing workpiece with a plug as the workpiece is pushed and inserted between the rolling rolls under the forced guidance by a pushing force working in the axial direction, and as the plug progresses into the center of cross section of the workpiece, so as to pierce the workpiece, thereby producing seamless steel tube having very little nonuniformity of the wall thickness.
摘要翻译： 在通过穿孔工件和穿孔步骤之后的轧制步骤的具有正方形或矩形横截面的坯料生产无缝钢管的方法中，每一个步骤都是用一个心轴向中心延伸的 当工件被水平排列的一对辊轧制时，工件的横截面。 穿孔步骤包括当坯料被迫穿过其中时沿着轧制线前面的轧制线设置的多对导向辊来引导工件，以将坯料保持在这样的位置，使得中空壳体不会具有任何不均匀的壁 厚度和穿孔工件随着工件被推动并在强制引导下通过在轴向工作的推力而插入轧辊之间，并且当插头进入工件的横截面中心时，以便 刺穿工件，从而生产壁厚不均匀的无缝钢管。
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公开(公告)号：US4106318A
公开(公告)日：1978-08-15
申请号：US759868
申请日：1977-01-17
摘要： In the rolling of metallic material by using a rolling mill having a working roll for each surface of the workpiece reduced and having the shafts fixed with respect to movement in the direction of travel of the workpiece, the workpiece is rolled at such a high reduction rate in cross-sectional area that the contact angle .theta. between the working roll and the workpiece can have a value of .gtoreq. tan.sup.-1 .mu. (.mu. being the coefficient of friction between the working roll and the workpiece), and the rolling operation is carried out by pushing the workpiece between the working rolls, so that a neutral point of relative movements between the rods and the workpiece wire remain within the surface along which the working roll and the workpiece contact each other. The rolling apparatus has a device to push the workpiece between the working rolls and a rolling mill or rolling mills of high reduction capacity to roll the thus pushed workpiece at a high reduction rate of the cross-sectional area, whereby there can be rolled strip, bar, wire rod shape, beam blank or the like in a limited number of passes.
摘要翻译： 在通过使用具有用于工件的每个表面的工作辊的轧机减少金属材料并使轴相对于在工件的行进方向上移动而固定的工件的轧制中，工件以如此高的压下率滚动 在工作辊和工件之间的接触角θ可以具有> / = tan-1 mu的值（μ是工作辊和工件之间的摩擦系数）的横截面积，并且轧制操作是 通过在工作辊之间推动工件来实现，使得杆和工件线之间的相对运动的中性点保持在工作辊和工件相互接触的表面内。 轧制装置具有在工作辊之间推动工件的装置和具有高还原能力的轧机或轧机以横截面积的高减速率滚动如此推动的工件，由此可以轧制带材， 棒，线棒形状，梁坯料等。
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公开(公告)号：US4455849A
公开(公告)日：1984-06-26
申请号：US255482
申请日：1981-04-20
CPC分类号： B21B17/08
摘要： In a press-rolling process for producing a metal tubular product, which comprises a pipe-forming procedure in which a square metal billet is fed into a rolling mill which consists of a pair of pressing rolls which have semi-circular grooves forming circular shape and which is provided with a plug held in the center line of the circular shape, according to the present invention, the press-rolling process is characterized in that a cavity is formed in the center portion of the forward surface of the billet before the pipe-forming procedure, the diameter of the cavity corresponding to 70% or more but less than 100% of the diameter of the plug and the volume of the cavity being equal to or more than the volume of a portion of the plug located in the inserting side of the billet from the axial center of the rolling mill.
摘要翻译： 在一种用于生产金属管状产品的压制方法中，其包括一种成形方法，其中方形金属坯料被供给到由具有形成圆形形状的半圆形槽的一对加压辊组成的轧机中， 其具有保持在圆形中心线上的塞子，根据本发明，压制方法的特征在于，在管状管坯之前的坯料的前表面的中心部分中形成有空腔， 形成过程中，空腔的直径对应于塞子的直径的70％以上但小于100％，并且空腔的体积等于或大于位于插入侧的插头的一部分的体积 的坯料从轧机的轴心。
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公开(公告)号：US4382375A
公开(公告)日：1983-05-10
申请号：US270123
申请日：1981-06-03
CPC分类号： B21B1/222
摘要： Three or more work rolls are arranged substantially in line with each other so that the adjoining work rolls each form a roll pass between them. The work rolls are driven in such a way that the rolls closer to the exit end of the rolling mill stand rotate with increasingly greater peripheral speeds. Metal strip is continuously passed through each roll pass and is wound around part of the periphery of the work rolls disposed between the work rolls at both ends of the stand. Thus, the strip is rolled between each pair of the adjoining work rolls. The work rolls are also driven in such a way that at least in one of the pairs of the work rolls, the peripheral speed of the higher-speed work roll is greater than the speed with which the strip leaves the roll pass formed by the pair of work rolls.
摘要翻译： 三个或更多个工作辊彼此基本一致地布置，使得相邻的工作辊在它们之间形成辊道。 工作辊以这样的方式驱动，使得靠近轧机机架的出口端的辊随着越来越多的圆周速度而旋转。 金属带连续通过每个辊道，并且缠绕在设置在支架两端的工作辊之间的工作辊的周边的一部分周围。 因此，条带在每对邻接的工作辊之间滚动。 工作辊也被驱动，使得至少在一对工作辊中，高速工作辊的圆周速度大于条带离开由该对形成的辊道的速度 的工作卷。
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