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    • 78. 发明授权
    • Method of controlling inter-stand tension in rolling mills
    • 控制轧机间间张力的方法
    • US4089196A
    • 1978-05-16
    • US781327
    • 1977-03-25
    • Katsuya KondoTomio Yamakawa
    • Katsuya KondoTomio Yamakawa
    • B21B1/18B21B37/00B21B37/48B21B37/52G05D13/62B21B37/06
    • B21B37/52B21B37/48B21B1/18
    • There is disclosed a method of controlling inter-stand tension in rolling mills in which a tension measuring device is provided on each stand. The tension measuring device comprises a pair of load sensing devices provided respectively at the entry and delivery sides of the roll stand. Difference between outputs from the pair of load sensing devices is used as an output value of the tension measuring device. First, while a workpiece is captured by the second stand but is not yet captured by the third stand and when the tension in the workpiece between the first and second stands is consistent with a desired value, the output value from the tension measuring device of the second stand is stored. After the workpiece has been captured by the third stand, the difference between the stored output value and the output value from the tension measuring device of the second stand is used as the measured value of tension. The tension control for the workpiece between the second and third stands is carried out on the basis of the difference between the measured value and a desired value of tension between the second and third stands.
    • 公开了一种控制轧机的机架间张力的方法,其中在每个支架上设置张力测量装置。 张力测量装置包括分别设置在辊架的入口侧和出口侧的一对负载感测装置。 使用来自一对负载感测装置的输出之间的差异作为张力测量装置的输出值。 首先,当工件被第二支架捕获但是尚未被第三支架捕获时,并且当第一和第二支架之间的工件中的张力与期望值一致时,来自张力测量装置的输出值 第二支架被存储。 在第三支架被捕获工件之后,使用来自第二支架的张力测量装置的存储的输出值和输出值之间的差作为张力的测量值。 基于第二和第三机架之间的测量值和期望的张力值之间的差异来进行第二和第三机架之间的工件的张力控制。
    • 80. 发明申请
    • METHOD FOR PRODUCING SEAMLESS TUBE/PIPE
    • 生产无缝管/管的方法
    • US20130255342A1
    • 2013-10-03
    • US13991635
    • 2011-12-06
    • Kenichi SaitouKazuhiro ShimodaTomio Yamakawa
    • Kenichi SaitouKazuhiro ShimodaTomio Yamakawa
    • B21B21/02
    • B21B21/02B21B19/04B21B25/00B21B2261/08B21B2261/10
    • By using a piercing mill that includes a pusher on the entrance side, a plug on the exit side along a pass line, and a plurality of angled rolls as being provided around the plug so as face to each other, in the case where the maximum diameter of an unsound region consisting of center segregation and porosity in a cross section of a billet is d [mm], piercing-rolling is performed under the condition that the plug nose rolling reduction ratio (TDF) expressed by Formula (1) satisfies Formula (2). TDF=(Bd−D1)/Bd  (1) TDF≦−0.50×(d/Bd)+0.06  (6) In Formulae (1) and (2), Bd is the billet diameter [mm], and D1 is the opening [mm] between the angled rolls at the plug nose position. Thereby, when piercing-rolling is performed, the occurrence of an inner surface flaw attributable to the center segregation and porosity in the billet can be prevented reliably.
    • 通过使用包括在入口侧的推动器的穿孔机,沿着通行线的出口侧的塞子和在插头周围设置成彼此面对的多个成角度的辊,在最大值 在坯料的横截面中由中心偏析和孔隙率组成的不固定区域的直径为d [mm],在由式(1)表示的塞子前端滚动压下率(TDF)满足公式的条件下进行穿孔轧制 (2)。 TDF =(Bd-D1)/ Bd(1)TDF@-0.50×(d / Bd)+0.06(6)在公式(1)和(2)中,Bd是坯料直径[mm],D1是 在插头前端位置的成角度的卷轴之间打开[mm]。 因此,当进行穿孔轧制时,可以可靠地防止由于中心偏析引起的内表面缺陷的发生和坯料中的孔隙率的发生。