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    • 5. 发明申请
    • Bearing steel,method for evaluating large-sized inclusions in the steel and rolling bearing
    • 轴承钢,钢和滚动轴承大型夹杂物的评估方法
    • US20060048576A1
    • 2006-03-09
    • US10498876
    • 2003-01-17
    • Akihiro KiuchiYutaka IshiiYouichi MatsumotoMasaru KawabeHiroshi NaraiNaoko Yokoyama
    • Akihiro KiuchiYutaka IshiiYouichi MatsumotoMasaru KawabeHiroshi NaraiNaoko Yokoyama
    • G01M13/04F16C19/00
    • G01N29/11F16C33/12F16C33/30F16C2204/60G01N29/2456G01N29/265G01N29/28G01N2291/014G01N2291/0234G01N2291/02836G01N2291/0421G01N2291/0422G01N2291/101G01N2291/2696
    • A first object is to provide a method for evaluating large-sized inclusions in a bearing steel. The method enables quantitative evaluation of large-sized inclusions even if the steel has a high degree of cleanliness. Further, a second object is to provide an appropriate bearing steel evaluated by the method for evaluating large-sized inclusions. Further, a third object is to provide a rolling bearing capable of eliminating short life products and cracked products and providing longer lifetime for entire bearings. In order to achieve the first object, a round bar formed of a bearing steel to be evaluated and an ultrasonic probe are placed in an ultrasonic transmission medium, and the size and number of large-sized inclusions that are present in the flaw detection volume are measured to estimate the existence probability of large-sized inclusions in the bearing steel to be evaluated. The second object is achieved by specifying large-sized inclusions that are present in the bearing steel in accordance with the method for evaluating large-sized inclusions. Further, to achieve the third object, a rolling bearing is manufactured from a seamless steel tube, as material, having a diameter of 180 mm or less and a wall thickness of 25 mm or less, and ensured that it does not include a defect having a length of 1 mm of more at its material stage.
    • 第一个目的是提供一种用于评估轴承钢中的大尺寸夹杂物的方法。 该方法能够对大尺寸夹杂物进行定量评价,即使钢具有高度的清洁度。 此外,第二个目的是提供通过用于评估大尺寸夹杂物的方法评估的合适的轴承钢。 此外,第三个目的是提供一种能够消除短寿命产品和破裂产品并为整个轴承提供更长寿命的滚动轴承。 为了实现第一个目的,将由待评估的轴承钢形成的圆棒和超声波探头放置在超声波传播介质中,并且存在于探伤体积中的大尺寸夹杂物的尺寸和数量是 测量以评估待评估的轴承钢中大尺寸夹杂物的存在概率。 第二个目的是通过根据用于评估大尺寸夹杂物的方法来指定存在于轴承钢中的大尺寸夹杂物来实现的。 此外,为了实现第三个目的,一种滚动轴承由直径为180mm以下且壁厚为25mm以下的无缝钢管作为材料制造,并且确保不包括具有 在其材料阶段的长度为1毫米。
    • 8. 发明授权
    • Life predicting method for rolling bearing, life predicting device, rolling bearing selecting device using life predicting device, program and environment coefficient determining method
    • 滚动轴承寿命预测方法,寿命预测装置,使用寿命预测装置的滚动轴承选择装置,程序和环境系数确定方法
    • US07305330B2
    • 2007-12-04
    • US10493245
    • 2002-10-24
    • Seigou UrakamiYouichi MatsumotoYasuo Murakami
    • Seigou UrakamiYouichi MatsumotoYasuo Murakami
    • G06G7/48G06F7/60
    • F16C19/00
    • To predict a correction rated life at high accuracy. A life predicting device executes step S1, step S2, step S4 for inputting specification information including a basic dynamic rated load C and basic static rated load C0, step 5 for computing a dynamic equivalent load P based on the specification information. step S3 for setting a reliability factor a1, step S7 and step S8 for determining a contact ellipse area S, step S9 for inputting a foreign substance purchasing diameter ddebris (“debris” means “foreign substance”), step 10 for determining a standardized foreign substance diameter (ddebris/√ S), step S11 for setting a life correction coefficient axyz based on the standardized foreign substance diameter, and step S6 and step S12 for calculating a correction rated life Lnm based on the reliability coefficient, the life correction coefficient, the basic dynamic rated load and the dynamic equivalent load and the like.
    • 以高精度预测校正额定寿命。 寿命预测装置执行步骤S1,步骤S2,步骤S4,用于输入包括基本动态额定负载C和基本静态额定负荷C 0的规定信息,步骤5用于计算动态等效负载 P根据规格信息。 步骤S 3,用于设定可靠性因子α1,步骤S7和步骤S8,用于确定接触椭圆区域S;步骤S 9,用于输入异物购买直径d < SUB“(”碎片“是指”异物“),用于确定标准化异物直径的步骤10(d / S)),用于设定寿命校正系数a 基于标准化异物直径的xyz ,以及用于基于可靠性系数,寿命校正系数,基本动力学来计算校正额定寿命L SUB nm的步骤S 6和步骤S 12 额定负载和动态等效负载等。