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    Method for piercing titanium alloy solid billet
    3.
    发明授权
    Method for piercing titanium alloy solid billet 有权

    公开(公告)号：US11779972B2

    公开(公告)日：2023-10-10

    申请号：US17483925

    申请日：2021-09-24

    Applicant: Northwestern Polytechnical University

    Inventor： Yanhui Yang ,  Dong Liu ,  Jianguo Wang

    IPC: B21B19/04 ,  B21B23/00

    CPC classification number: B21B19/04 ,  B21B23/00 ,  B21B2203/18

    Abstract: A method for piercing a titanium alloy solid billet, the method including: 1) providing a Mannesmann rotary piercer including two rollers, a feed channel, a plurality of centering devices, and a mandril including a plug; fixing the mandril using the plurality of centering devices, where the Mannesmann rotary piercer has a feeding angle of 6-18°, a cross angle of 15°, and a roll speed of 30-90 rpm; 2) heating a titanium alloy solid billet to 930-990° C.; 3) transferring the titanium alloy solid billet to the feed channel of the Mannesmann rotary piercer; and 4) aligning the titanium alloy solid billet with the plug of the mandril, and driving the titanium alloy solid billet to pass through the plug of the mandril, thereby piercing the titanium alloy solid billet and yielding a titanium alloy tube.

    METHOD FOR PRODUCING SEAMLESS METAL TUBE
    4.
    发明申请
    METHOD FOR PRODUCING SEAMLESS METAL TUBE 有权

    公开(公告)号：US20230054014A1

    公开(公告)日：2023-02-23

    申请号：US17758049

    申请日：2020-09-28

    Applicant: NIPPON STEEL CORPORATION

    Inventor： Kazuhiro SHIMODA ,  Kouji YAMANE ,  Koichi KURODA ,  Yuji INOUE ,  Shusuke SHIMOOKA ,  Kazuyuki MURAKAMI ,  Kota SHINDO

    IPC: B21B19/04 ,  B21B27/02

    Abstract: A method disclosed herewith is a method for producing a first seamless metal tube with a first wall thickness and a second seamless metal tube with a second wall thickness by using a three-roll-type inclined rolling mill, and the method includes a first inclination rolling step (#5), a setting changing step (#10), and a second inclination rolling step (#15). At the first inclination rolling step, a first workpiece is rolled by the inclined rolling mill. At the setting changing step, a setup condition of the inclined rolling mill is changed in a manner (a) or (b) as described below. At the second inclined rolling step, a second workpiece is rolled by the inclined rolling mill under the changed condition. (a) When the second wall thickness is smaller than the first wall thickness, the cross angle of each of the inclined rolls is made greater than the cross angle set for the first inclination rolling step. (b) When the second wall thickness is larger than the first wall thickness, the cross angle of each of the inclined rolls is made smaller than the cross angle set for the first inclination rolling step.

    Method for producing seamless metal pipe
    6.
    发明授权
    Method for producing seamless metal pipe 有权

    公开(公告)号：US11305320B2

    公开(公告)日：2022-04-19

    申请号：US16619631

    申请日：2018-06-08

    Applicant: Nippon Steel Corporation

    Inventor： Kouji Yamane ,  Kazuhiro Shimoda ,  Yuji Inoue ,  Shusuke Shimooka ,  Yuichi Yamanari

    IPC: B21C23/08 ,  B21B19/04 ,  B21C25/08

    Abstract: A method for producing a seamless metal pipe includes the steps of: preparing a billet having a diameter (B); heating the billet; forming, in a center part of a rear end of the heated billet, a hole including four grooves extending in an axial direction of the billet, the grooves each having a groove width (D) satisfying Formula (1), a groove height (H) satisfying Formula (2), and a groove depth (L1) satisfying Formula (3); and subjecting the billet provided with the hole to piercing-rolling from a front end thereof by means of a piercing machine. By this means, the generation of burrs and internal defects at the rear end of a hollow shell after piercing-rolling can be suppressed. 0.12≤D/B≤0.25  (1) 0.10≤H/B≤0.20  (2) 0.05≤L1/B≤0.10  (3)

    CROSS-ROLLING MILL WITH HYDRAULIC ROLLER ACTUATOR
    8.
    发明申请
    CROSS-ROLLING MILL WITH HYDRAULIC ROLLER ACTUATOR 有权

    公开(公告)号：US20210229147A1

    公开(公告)日：2021-07-29

    申请号：US17050852

    申请日：2019-04-24

    Applicant: SMS group GmbH

    Inventor： Frank D'HONE ,  Martin SAUERLAND ,  Matthias KRAHN

    IPC: B21B19/04 ,  B21B38/10

    Abstract: A cross-rolling mill for rolling a block over a mandrel forms a hollow block. It includes a plurality of working rollers, each of which exerts a substantially radially aligned rolling force onto the block. The working rollers are supported in a roll stand, and the gap between the working rollers and preferably also the alignment of the rolling axis of at least one of the working rollers relative to the block can be modified. Hydraulic actuators, preferably hydraulic capsules, are provided in order to modify the rolling gap and preferably also the alignment of the rolling axis of at least one of the working rollers relative to the block.

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