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    • 1. 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 。
    • 2. 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 。
    • 3. 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。
    • 5. 发明授权
    • Mechanical pipe-end expander and a method of manufacturing seamless steel pipe
    • 机械管端膨胀机及无缝钢管制造方法
    • US07765850B2
    • 2010-08-03
    • US12230892
    • 2008-09-08
    • Tsutomu AritaMasayoshi AkiyamaKouichi KurodaTatsuya Okui
    • Tsutomu AritaMasayoshi AkiyamaKouichi KurodaTatsuya Okui
    • B21D41/02B21D39/20B21D39/08
    • B21D41/02B21D39/20
    • The present invention provides a mechanical pipe-end expander comprising a cone and a die having tapered wedge bodies whose outer radius is larger towards a flangeless end direction from a flange end, wherein a pipe-end zone is expanded by a wedge effect of the die, which results from a procedure that the cone and the die are inserted together into the pipe-end zone to be expanded, and that then only the cone is axially drawn outwards leaving the die within the pipe-end zone. A seamless steel pipe with an expanded pipe-end zone is manufactured by applying a mechanical pipe-end expander comprising a die having tapered wedge bodies whose outer radius is larger towards a flangeless end direction from a flange end. The resulting seamless steel pipe has satisfactory pipe-end dimensional accuracy, and exhibits characteristics with excellent field welding workability.
    • 本发明提供了一种机械管端膨胀机,其包括具有锥形和锥形的模具,所述锥体和模具具有锥形楔形体,其外径比法兰端的无法兰端方向更大,其中管端区域通过模具的楔形效应而膨胀 这是由锥体和模具一起插入到管端区域中以扩展的程序产生的,然后只有锥体被轴向地向外拉出,使得模具在管端区域内。 具有扩展的管端区域的无缝钢管通过应用机械管端膨胀机制造,所述机械管端膨胀机包括具有锥形楔形体的模具,所述模具的外径从凸缘端朝向无凸缘端方向较大。 所得到的无缝钢管具有令人满意的管端尺寸精度,并具有优异的现场焊接加工性能。
    • 6. 发明申请
    • Induction hardened hollow driving shaft
    • 感应淬火空心驱动轴
    • US20090023506A1
    • 2009-01-22
    • US11903940
    • 2007-09-25
    • Kunio KondoKouichi Kuroda
    • Kunio KondoKouichi Kuroda
    • F16C3/02C22C38/60C22C38/18
    • C21D9/08C21D1/10C21D1/18C21D1/42C21D9/28F16C3/02F16C2204/62F16C2326/06Y02P10/253
    • The present invention provides an induction-hardened hollow driving shaft that comprises, as a raw material, a steel pipe that contains, by mass %, 0.30 to 0.47% C, 0.5% or less Si, 0.3 to 2.0% Mn, 0.018% or less P, 0.015% or less S, 0.15 to 1.0% Cr, 0.001 to 0.05% Al, 0.005 to 0.05% Ti, 0.004% or less Ca, 0.01% or less N, 0.0005 to 0.005% B and 0.0050% or less O (oxygen) and the balance Fe and impurities and of which Beff defined by an equation (a) or (b) below is 0.0001 or more, wherein a prior austenite grain size number (JIS G0551) after the hardening is 9 or more. Here, in the case of Neff=N−14×Ti/47.9≧0, Beff=B×10.8×(N−14×Ti/47.9)/14 . . . (a), and, in other cases, Beff=B . . . (b). According to the present invention, a hollow driving shaft that is simultaneously provided with excellent cold workability, hardenability, toughness and torsional fatigue strength and can exert stable fatigue lifetime can be obtained and can be widely utilized.
    • 本发明提供一种感应淬火的中空驱动轴,其包括以质量%计含有0.30〜0.47%C,0.5%以下的Si,0.3〜2.0%Mn,0.018%或以下的钢管作为原料 较小的P,0.015%以下的S,0.15〜1.0%的Cr,0.001〜0.05%的Al,0.005〜0.05%的Ti,0.004%以下的Ca,0.01%以下的N,0.0005〜0.005%的B和0.0050%以下的O (氧),余量为Fe和杂质,其中由下式(a)或(b)定义的Beff为0.0001以上,硬化后的原奥氏体晶粒数(JIS G0551)为9以上。 这里,在Neff = N-14xTi / 47.9> = 0的情况下,Beff = B××××(N-14×Ti / 47.9)/ 14。 。 。 (a),而在其他情况下,Beff = B。 。 。 (b)。 根据本发明,可以获得同时具有优异的冷加工性,淬透性,韧性和扭转疲劳强度并且可以发挥稳定的疲劳寿命的中空驱动轴,并且可以被广泛使用。
    • 10. 发明授权
    • Control apparatus for washing machine
    • 洗衣机控制装置
    • US5265446A
    • 1993-11-30
    • US4146
    • 1993-01-13
    • Kouichi KurodaHajime SuzukiMasakatsu MorishigeKatsuji Oonishi
    • Kouichi KurodaHajime SuzukiMasakatsu MorishigeKatsuji Oonishi
    • A47L15/42A47L15/46D06F39/00G01D3/036G01F23/292D06F33/02
    • A47L15/4297D06F39/004G01D3/036G01F23/2921
    • The control apparatus of the present invention is used for a washing machine in which a photosensor having a light emitting element and a light receiving element opposite thereto, detects the degree of light transmission in washing water, and in which, based on variations of the degree of light transmission in washing water thus detected, the respective steps of washing, rinsing and draining are controlled. Correction is made such that the photosensor presents a predetermined sensitivity to set a current which flows in the light emitting element, after which a washing operation is started. After drainage, when the next water supply operation is started and the level of water thus supplied reaches a predetermined level within a predetermined period of time, it is judged that washing water used at the previous washing remains in a washing tank. Then, control is made such that no adjustment is made of the sensitivity of the photosensor and a standard current flows in the light emitting element. Thereafter, a washing operation is started. Thus, the control apparatus of the present invention is adapted such that no influence is exerted upon the degree of washing by variations of the characteristics of light emitting elements and light receiving elements.
    • 本发明的控制装置用于其中具有发光元件和与其相对的光接收元件的光电传感器检测洗涤水中的光透射度的洗衣机,其中,基于该程度的变化, 在如此检测的洗涤水中的透光性,控制洗涤,漂洗和排水的各个步骤。 进行校正,使得光传感器呈现预定的灵敏度以设定在发光元件中流动的电流,之后开始洗涤操作。 在排水之后,当下一个供水操作开始并且这样提供的水位在预定时间段内达到预定水平时,判断在先前洗涤中使用的洗涤水保留在洗涤槽中。 然后进行控制,使得不对光电传感器的灵敏度进行调整,并且在发光元件中流动标准电流。 此后,开始洗涤操作。 因此,本发明的控制装置适于使得不会因发光元件和光接收元件的特性的变化而对洗涤程度产生影响。