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    Deoxidation of cross-rolled hollow blocks
    1.
    发明授权
    Deoxidation of cross-rolled hollow blocks 有权

    公开(公告)号：US09833820B2

    公开(公告)日：2017-12-05

    申请号：US14419684

    申请日：2013-08-29

    Applicant: SMS MEER GMBH

    Inventor： Peter Thieven

    IPC: B21B19/04 ,  B21B45/00 ,  B21B45/04 ,  B21B25/00 ,  B21B23/00

    CPC classification number: B21B19/04 ,  B21B23/00 ,  B21B25/00 ,  B21B45/00 ,  B21B45/04

    Abstract: The invention relates to a method for producing a tube (2) or tubular pre-product from a solid billet in a rolling mill, comprising at least one roll (5a, 5b) acting from the outside on the solid billet or tubular pre-product and a mandrel (4) carrying a piercing head (3) and engaging from the inside in the tube or tubular pre-product, wherein immediately after the solid billet has been completely pierced by the piercing head a fluidized deoxidation agent and/or an inert gas is supplied to the end of the tube or tubular pre-product facing the roll and is guided through the tube or tubular pre-product into the interior of the tube or tubular pre-product when the mandrel is withdrawn. The invention further relates to a rolling mill for performing the method according to the invention, comprising at least one roll acting from the outside onto the solid billet or tubular pre-product and a mandrel carrying a piercing head and engaging from the inside in the tube or tubular pre-product, wherein a device is provided for feeding and introducing a fluidized deoxidation agent and/or an inert gas to the end of the tube or tubular pre-product facing the at least one roll.

    PIERCING MANDREL HAVING AN IMPROVED SERVICE LIFE FOR PRODUCING SEAMLESS TUBES
    2.
    发明申请
    PIERCING MANDREL HAVING AN IMPROVED SERVICE LIFE FOR PRODUCING SEAMLESS TUBES 有权
    具有改进生产无缝管的服务寿命的悍马人

    公开(公告)号：US20160346820A1

    公开(公告)日：2016-12-01

    申请号：US14917371

    申请日：2014-12-12

    Applicant: SANMINA CORPORATION

    Inventor： Winfried Braun ,  Christian Klempel ,  Rene Baadjou ,  Rolf Kümmerling

    IPC: B21B25/00

    CPC classification number: B21B25/00

    Abstract: A piercing mandrel for piercing heated round blocks of metal for the production of seamless pipes, having a piercing mandrel nose and a piercing mandrel main body which can be connected to a mandrel bar. The outer diameter of the piercing mandrel nose is formed in a conically tapering manner in the longitudinal direction towards the piercing mandrel main body in order to increase the durability of the piercing mandrel when used for piercing round blocks of metal, in particular higher-alloyed steel materials which are difficult to work, by means of skew rolling providing a qualitative improvement of the inner surface of the pierced round block and reducing tool costs.

    Abstract translation: 一种用于刺穿加热的金属圆块的穿孔心轴，用于生产无缝管，具有穿刺心轴鼻和可连接到芯棒的穿刺心轴主体。 穿刺心轴鼻部的外径在朝向穿孔心轴主体的纵向方向上以锥形锥形形成，以便在用于刺穿圆形金属块，特别是较高合金钢的时候增加穿孔心轴的耐久性 通过倾斜轧制难以加工的材料提供穿孔圆块的内表面的定性改进并降低工具成本。

    METHOD OF PRODUCING PLUG FOR PIERCING-ROLLING
    3.
    发明申请
    METHOD OF PRODUCING PLUG FOR PIERCING-ROLLING 审中-公开
    生产滚珠丝杠的方法

    公开(公告)号：US20150132501A1

    公开(公告)日：2015-05-14

    申请号：US14395245

    申请日：2013-03-19

    Applicant: NIPPON STEEL & SUMITOMO METAL CORPORATION

    Inventor： Yasuto Higashida ,  Yasuyoshi Hidaka

    IPC: C23C4/12 ,  C23C4/06 ,  B21B25/00

    CPC classification number: C23C4/06 ,  B21B19/04 ,  B21B25/00 ,  C23C4/131

    Abstract: A method for producing a plug for use in a piercing rolling mill for producing a seamless steel tube/pipe includes an arc-spraying step of melting iron wires, and spraying molten material thereof onto a surface of a base metal of a plug by use of an arc-spray gun, so as to form a film containing oxide and Fe on the surface of the base metal of the plug. In the arc-spraying step, the surface of the base metal of the plug is divided into plural sections along an axial direction of the plug, and in turn, the arc-spraying is separately carried out in each of the plural sections while an intersection angle between the center line of a spraying stream from the arc-spray gun and the surface of the plug base metal is maintained within a range of 35 degrees to 90 degrees.

    Abstract translation: 一种用于生产无缝钢管/管道的穿孔轧机中使用的塞子的方法包括熔化铁丝的电弧喷涂步骤，并且通过使用以下方式将熔融材料喷射到塞子的母材表面上 电弧喷枪，以便在插头的贱金属的表面上形成含有氧化物和Fe的膜。 在电弧喷涂工序中，将插头的母材的表面沿着插头的轴向分割为多个部分，然后在多个部分中分别进行电弧喷涂，同时， 来自电弧喷枪的喷射流的中心线与插头母材的表面之间的角度保持在35度至90度的范围内。

    Plug, piercing-rolling mill, and method of producing seamless tube by using the same
    4.
    发明授权
    Plug, piercing-rolling mill, and method of producing seamless tube by using the same 有权
    插头，穿孔轧机，以及使用其制造无缝管的方法

    公开(公告)号：US08544306B2

    公开(公告)日：2013-10-01

    申请号：US13212929

    申请日：2011-08-18

    Applicant: Yasuto Higashida ,  Yasuyoshi Hidaka ,  Kazuhiro Shimoda ,  Tomio Yamakawa

    Inventor： Yasuto Higashida ,  Yasuyoshi Hidaka ,  Kazuhiro Shimoda ,  Tomio Yamakawa

    IPC: B21B19/04

    CPC classification number: B21B25/00 ,  B21B19/04 ,  B21B25/04

    Abstract: A plug includes a front edge portion having a convex curvature; a cylindrical portion having a truly or nearly cylindrical shape; a trunk portion having an outer diameter gradually increasing toward a rear edge thereof; a mandrel joint provided in a rear edge portion of the plug; a lubricant ejection hole running through the trunk portion from the mandrel joint that opens on the surface of the cylindrical portion; and a coating comprising oxides and Fe that is formed on the base metal surface of each of the front edge portion as well as the trunk portion by arc spraying using an iron wire. In this way, the plug can prevent inner surface flaws from occurring in a hollow blank that is deformed by piercing-rolling, and can extend its life without requiring a long time for making it.

    Abstract translation: 塞子包括具有凸曲率的前边缘部分; 具有真正或近似圆柱形形状的圆柱形部分; 躯干部分的外径朝向其后缘逐渐增加; 设置在所述插头的后端部的心轴接头; 润滑剂喷射孔，其从所述心轴接头穿过所述躯干部分，所述心轴接头在所述圆筒部分的表面上开口; 以及通过使用铁丝的电弧喷涂而形成在前边缘部分和后端部的基底金属表面上的氧化物和Fe的涂层。 以这种方式，塞子可以防止在通过穿孔轧制变形的中空坯件中发生内表面缺陷，并且可以延长其使用寿命而不需要很长时间来制造它。

    ROLLING PROCESS AND RELATING LONGITUDINAL, MULTI-STAND ROLLING MILL OF CONTINUOUS, RESTRAINED TYPE FOR HOLLOW BODIES
    6.
    发明申请
    ROLLING PROCESS AND RELATING LONGITUDINAL, MULTI-STAND ROLLING MILL OF CONTINUOUS, RESTRAINED TYPE FOR HOLLOW BODIES 有权
    滚动过程和相关的长期连续的多台式轧机，中空机构的限制类型

    公开(公告)号：US20120103049A1

    公开(公告)日：2012-05-03

    申请号：US13379625

    申请日：2010-06-29

    Applicant: Ettore Cernuschi ,  Mauro Lattanzi

    Inventor： Ettore Cernuschi ,  Mauro Lattanzi

    IPC: B21B1/00

    CPC classification number: B21C45/00 ,  B21B17/14 ,  B21B23/00 ,  B21B25/00 ,  B21B25/02

    Abstract: A longitudinal, multi-stand rolling mill of the continuous, restrained type for rolling hollow bodies is described, which comprises a main rolling mill (2) and an extracting rolling mill (4) in line and downstream of the main rolling mill, at a distance from the main rolling mill larger than the maximum length of the hollow body and of the spindle, and in which the spindle is extracted at the outlet of the main rolling mill in the gap between said main rolling mill and extracting rolling mill, and is laterally unloaded.

    Abstract translation: 描述了用于轧制中空体的连续约束型纵向多立式轧机，其包括在主轧机的直线和下游的主轧机（2）和提取轧机（4），在 距主轧机的距离大于中空体和主轴的最大长度，主轧机在主轧机的出口处在主轧机与提取轧机之间的间隙中提取主轴，并且 横向卸载

    ROLLING MILL OF ROTATING EXPANDER TYPE FOR TUBULAR BODIES WITH TIP-STABILIZING SYSTEM
    8.
    发明申请
    ROLLING MILL OF ROTATING EXPANDER TYPE FOR TUBULAR BODIES WITH TIP-STABILIZING SYSTEM 有权
    旋转式膨胀机类型用于带有稳定系统的管状体

    公开(公告)号：US20110154876A1

    公开(公告)日：2011-06-30

    申请号：US12736995

    申请日：2009-05-29

    Applicant: Ettore Cernuschi ,  Fabrizio Marini

    Inventor： Ettore Cernuschi ,  Fabrizio Marini

    IPC: B21B19/08 ,  B21B25/00

    CPC classification number: B21B19/08 ,  B21B25/00

    Abstract: A rolling mill of rotating expander type for tubular bodies, comprising: working rollers (1, 2) arranged inclined with respect to the rolling axis; a tip (3) fitted on a beam (4), so that the tubular body is pushed in rotation between the rollers and the tip, and subjected to deformation in order to increase the perimeter; a tip-stabilizing system placed behind said tip, about the beam, and integrated in the rolling mill.

    Abstract translation: 一种用于管状体的旋转膨胀机型轧机，包括：相对于滚动轴线倾斜布置的加工辊（1,2） 安装在梁（4）上的尖端（3），使得管状体在辊和尖端之间旋转地被推动，并且变形以增加周长; 一个尖端稳定系统，放置在所述尖端的后面，围绕梁，并集成在轧机中。

    Plug for use in piercing mill
    9.
    发明授权
    Plug for use in piercing mill 有权
    插头用于穿孔机

    公开(公告)号：US07530248B2

    公开(公告)日：2009-05-12

    申请号：US12155657

    申请日：2008-06-06

    Applicant: Kazuhiro Shimoda ,  Tomio Yamakawa

    Inventor： Kazuhiro Shimoda ,  Tomio Yamakawa

    IPC: B21B19/04

    CPC classification number: B21B25/00 ,  B21B19/04

    Abstract: A plug has a tip end portion, a taper portion, and a middle portion. The surface of the tip end portion is a spherical surface whose radius of curvature is R1 and length is L1 that is shorter than R1. The outer diameter of the taper portion on the front end side is D1, and the outer diameter on the back end side is D2 that is larger than D1, and the length is L2. The plug satisfies Expression (1), Expression (2) if 0

    Abstract translation: 插头具有尖端部分，锥形部分和中间部分。 前端部的表面是曲率半径为R1，长度为L1的比R1短的球面。 前端侧的锥形部的外径为D1，后端侧的外径为D2，D1的长度为L2。 如果0 0.5D1 <？in-line-formula description =“In-line Formulas”end =“lead”？> 1.0 <？in-line-formula description =“In-line Formulas”end =“lead”？> 1.0

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