PROBLEM TO BE SOLVED: To provide a practical and effective evaluation method for the wear performance of a pneumatic tire 2.SOLUTION: This evaluation method comprises: (1) the step of acquiring the section of a tire 2 vertical to the circumferential direction of the tire 2; (2) the step of specifying the contour of a carcass 12 in the section of the tire 2; (3) the step of turning the contour of the carcass 12 on the rotation axis of that tire 2 thereby to specify the three-dimensional shape of the carcass 12; (4) the step of cutting the three-dimensional shape of the carcass 12 to acquire a cut area 54; (5) the step of acquiring the length Lc of a segment CL, the length La of a segment Al and the length Lb of a segment BL thereby to specify the shape of a cut area 54; and (6) the step of deciding the wear performance of the tire 2 in dependence upon whether a ratio (La/Lc) satisfies 0.70 to 0.73 and a ratio (Lb/Lc) satisfies 0.83 to 0.88.SELECTED DRAWING: Figure 5
【課題】実用的でしかも有効な、空気入りタイヤ2の摩耗性能の評価方法の提供。【解決手段】この評価方法は、(1)タイヤ2の周方向に対して垂直な、このタイヤ2の断面を得る工程、(2)タイヤ2の断面におけるカーカス12の輪郭を特定する工程、(3)カーカス12の輪郭をこのタイヤ2の回転軸を中心に回転させて、カーカス12の立体形状を特定する工程、(4)カーカス12の立体形状を切断し、切り口54を得る工程、(5)線分CLの長さLc、線分ALの長さLa及び線分BLの長さLbを得て、切り口54の形状を特定する工程及び(6)比(La/Lc)が0.70以上0.73以下を満たし、比(Lb/Lc)が0.83以上0.88以下を満たすかによって、タイヤ2の摩耗性能を判定する工程を含む。【選択図】図5
EVALUATION METHOD FOR PNEUMATIC TIRE
空気入りタイヤの評価方法
2017-06-01
Patent
Electronic Resource
Japanese
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