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    • 2. 发明授权
    • Process for straightening a tube
    • 矫直管的工艺
    • US07654122B2
    • 2010-02-02
    • US12247912
    • 2008-10-08
    • Satoshi TsuyuguchiKouichi KurodaTomio Yamakawa
    • Satoshi TsuyuguchiKouichi KurodaTomio Yamakawa
    • B21D1/02B21B19/02
    • B21D3/04
    • In straightening a tube using a roll straightening machine provided with drum type straightening roll pairs vertically opposingly disposed, at least an outer layer portion of a roll main body is made of elastic material having spring type hardness Hs (JIS K 6301 A type) of 50 to 100 in at least three pairs of straightening rolls on an outlet side of the roll straightening machine, and an offset amount is imparted to a tube engaged in the three pairs, at least, of straightening opposing rolls such that η defined by an equation (1) ranges from 1.0×10−3 to 1.5×10−3. The offset amount is set at three positions along a tube axis where the upper and lower rolls of each pair horizontally cross. Therefore, an S/N ratio can be enhanced in an eddy current test from inside of the tube to improve inspection efficiency, and excellent quality accuracy can be ensured in a heat transfer tube used in a steam generator and the like. [ Formula ⁢ ⁢ 1 ] η = 1 R × ( d 2 ) ( 1 ) where a relationship of R=(δ2+L2)/2δ holds, assuming that d (mm) is a tube outside diameter, L (mm) is a roll stand span of the roll straightening machine, and δ (mm) is an offset amount.
    • 在使用设置有垂直相对设置的滚筒式矫直辊对的辊矫正机矫直管时,至少辊主体的外层部分由弹簧型硬度Hs(JIS K 6301A型)为50的弹性材料制成 至少在辊矫直机的出口侧的三对矫正辊中至少100个,并且至少对对置的三个对的管赋予偏移量,使得由等式( 1)的范围为1.0×10 -3〜1.5×10 -3。 偏移量设置在沿着每个对的上下辊的横轴交叉的管轴的三个位置处。 因此,可以在管内部的涡流试验中提高S / N比,提高检查效率,并且可以确保在蒸汽发生器等中使用的传热管中具有优良的质量精度。 假设d(mm)为管外径,则L(mm)为R =(delta2 + L2)/ 2delta的关系为[公式1] 1 = 1 R x(d 2)(1) 辊矫正机的轧辊架跨距,delta(mm)是偏移量。
    • 3. 发明申请
    • METHOD FOR STRAIGHTENING TUBE AND STRAIGHTENING ROLL
    • 用于连接管和连接辊的方法
    • US20120304724A1
    • 2012-12-06
    • US13589342
    • 2012-08-20
    • Yoshiyuki KUROIWAKouichi KurodaTomio Yamakawa
    • Yoshiyuki KUROIWAKouichi KurodaTomio Yamakawa
    • B21D3/04B21D37/00
    • B21D3/04
    • A method for straightening a tube by using an asymmetric roll, which has different diameters D1 (exit side), D2 (entry side) at relative maximum diameter portions, left and right roll shoulder portions, as a straightening roll of a straightener, wherein the roll shoulder having a smaller diameter is disposed to be located on the tube entry side. The straightening roll used therefor comprises roll shoulders 3a and 3b and a roll barrel portion 4, in which D1>D2 and 0.004≦(D1−D2)/d≦0.2 (d: outer diameter of tube to be straightened) are satisfied. Further, an aspect of the invention may define radii of curvatures of entry-side and exit-side shoulder potions in a section of the roll cut along a plane including the roll central axis, or a curve representing an outer surface of the roll barrel portion.
    • 通过使用作为矫直机的矫直辊的相对最大直径部分(相对最大直径部分)D2直径(入口侧)不同直径的不对称辊矫直管的方法,其中, 具有较小直径的辊肩设置在管入口侧。 用于其的矫直辊包括辊肩3a和3b以及辊筒部分4,其中D1> D2和0.004& N1;(D1-D2)/d≤n1E.0.2(d:要矫直的管的外径)。 此外,本发明的一个方面可以限定沿着包括辊中心轴的平面的辊切割部分中的入口侧和出口侧肩部的曲率半径,或表示辊筒部分的外表面的曲线 。
    • 4. 发明授权
    • Method for straightening tube and straightening roll
    • 矫正矫直辊的方法
    • US08783085B2
    • 2014-07-22
    • US13589342
    • 2012-08-20
    • Yoshiyuki KuroiwaKouichi KurodaTomio Yamakawa
    • Yoshiyuki KuroiwaKouichi KurodaTomio Yamakawa
    • B21B23/00B21D3/04B21D3/05B21B19/00
    • B21D3/04
    • A method for straightening a tube by using an asymmetric roll, which has different diameters D1 (exit side), D2 (entry side) at relative maximum diameter portions, left and right roll shoulder portions, as a straightening roll of a straightener, wherein the roll shoulder having a smaller diameter is disposed to be located on the tube entry side. The straightening roll used therefor comprises roll shoulders 3a and 3b and a roll barrel portion 4, in which D1>D2 and 0.004≦(D1−D2)/d≦0.2 (d: outer diameter of tube to be straightened) are satisfied. Further, an aspect of the invention may define radii of curvatures of entry-side and exit-side shoulder potions in a section of the roll cut along a plane including the roll central axis, or a curve representing an outer surface of the roll barrel portion.
    • 通过使用作为矫直机的矫直辊的相对最大直径部分(相对最大直径部分)D2直径(入口侧)不同直径的不对称辊矫直管的方法,其中, 具有较小直径的辊肩设置在管入口侧。 用于其的矫直辊包括辊肩3a和3b以及辊筒部分4,其中D1> D2和0.004& N1;(D1-D2)/d≤n1E.0.2(d:要矫直的管的外径)。 此外,本发明的一个方面可以限定沿着包括辊中心轴的平面的辊切割部分中的入口侧和出口侧肩部的曲率半径,或表示辊筒部分的外表面的曲线 。
    • 5. 发明授权
    • Method for producing seamless tube/pipe
    • 生产无缝管/管的方法
    • US09254511B2
    • 2016-02-09
    • US13991635
    • 2011-12-06
    • Kenichi SaitouKazuhiro ShimodaTomio Yamakawa
    • Kenichi SaitouKazuhiro ShimodaTomio Yamakawa
    • B21B21/02B21B19/04B21B25/00
    • 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  (2) 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(2)在式(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。
    • 7. 发明申请
    • Method of manufacturing seamless pipes
    • 制造无缝管的方法
    • US20090301155A1
    • 2009-12-10
    • US12453568
    • 2009-05-15
    • Tomio YamakawaKazuhiro Shimoda
    • Tomio YamakawaKazuhiro Shimoda
    • B21B19/04
    • B21B19/04B21B25/00
    • Seamless pipes excellent in quality features with high productivity is made by a by carrying out piercing-rolling using a piercer provided with a pair of inclined rolls. The piercing-rolling is carried out under conditions such that the plug tip draft (TDFT) or the root of the product of the plug tip draft (TDFT) are controlled along with the number of billet revolutions (N), namely (TDFT×N)0.5. In addition, positions of the inclined rolls are controlled in connection with the gorge draft (GDFT) indicating the ratio of the roll gap (Rg) which is minimal in the gorge section between the inclined rolls to the billet outside diameter (Bd). The piercing-rolling is carried out using a plug having a particular shape.
    • 通过使用设置有一对倾斜辊的穿孔机进行穿孔轧制,可以实现高生产率的质量特性优良的无缝管。 穿孔轧制在条件下进行,使得塞子末梢吃水深度(TDFT)或塞子末梢吃水深度(TDFT)的产物根与坯锭转数(N)一起被控制,即(TDFTxN)0.5 。 此外,倾斜辊的位置与峡谷吃水(GDFT)相关联地控制,表示倾斜辊之间的峡谷部分中的辊间隙(Rg)与坯料外径(Bd)之间的最小比例。 使用具有特定形状的塞子进行穿孔轧制。
    • 10. 发明申请
    • Seamless tube piercing/rolling plug, and seamless tube producing method using same
    • 无缝管穿孔/滚塞,以及使用其的无缝管生产方法
    • US20080134742A1
    • 2008-06-12
    • US12010303
    • 2008-01-23
    • Tomio YamakawaKazuhiro Shimoda
    • Tomio YamakawaKazuhiro Shimoda
    • B21B19/04
    • B21B25/06B21B25/00
    • The present invention provides a seamless tube piercing/rolling plug and a seamless tube producing method in which piercing/rolling is performed with an inclined rotary piercing mill while the seamless tube piercing/rolling plug is used as a piercing tool. The seamless tube piercing/rolling plug is used while a front part and a rear part of the split plug are held as an integral plug, at least the front part is made of low alloy steel, and oxide films are formed on surfaces of the front part and rear part. The present invention also provides a seamless tube piercing/rolling apparatus and a seamless tube producing method in which the front part and/or rear part is replaceable in a tube making process line using the seamless tube piercing/rolling apparatus. In the seamless tube piercing/rolling apparatus, the front part and rear part are held as the integral plug, the front part and/or rear part is removably mounted, a mandrel bar holding the plug goes through the rear part, and the mandrel bar is coupled with the front part. It is preferable that a thickness of the oxide film formed in the front part be set to 200 μm or more while the oxide film formed in the front part is thicker than the oxide film formed in the rear part. Even if a hard working material is pierced/rolled, a seam defect and inside surface defects are eliminated, and excellent life-time of plug and excellent plug cost per production quantity can be achieved.
    • 本发明提供了一种无缝管穿孔/滚压塞和无缝管制造方法,其中在使用无缝管穿孔/滚塞作为穿孔工具的同时,用倾斜的旋转穿孔机进行穿孔/轧制。 使用无缝管穿刺/滚压塞,而分离塞的前部和后部被保持为整体塞,至少前部由低合金钢制成,并且氧化膜形成在前表面 部分和后部。 本发明还提供了一种无缝管穿孔/轧制装置和无缝管制造方法,其中使用无缝管穿孔机可以在管制造线中替换前部和/或后部。 在无缝管穿刺/轧制装置中,前部和后部被保持为一体式塞子,前部和/或后部可拆卸地安装,保持插头的芯棒穿过后部,并且芯棒 与前部相结合。 优选的是,形成在前部的氧化膜的厚度设定为200μm以上,而在前部形成的氧化膜比形成在后部的氧化膜厚。 即使硬质材料被刺穿/轧制,也可以消除接缝缺陷和内表面缺陷,并且可以实现优异的插头寿命和优异的插头成本。