测量轮胎均匀性的试验方法

[中文适用范围]： 本国际标准规定了在受控条件下进行的测试方法，用于验证乘用车、商用车和摩托车轮胎的均匀性。 注：轮胎周围缺乏均匀性会导致轮胎施加到车辆上的力发生变化，并且这种影响会随着轮胎的每次旋转而重复。 然而，就目前的技术水平而言，不可能制造出完全一致的轮胎。 对整个制造过程的严格控制只能最大限度地减少影响均匀性的材料、组件和工艺不可避免的缺陷。 涵盖了测量轮胎径向和侧向几何跳动的方法，以及测量以下参数的方法： ——径向力变化； ——侧向力变化； ——帘布层转向； ——锥度。 并非所有这些测量都必然与每种情况相关。 本国际标准不包括静态和动态不平衡的测量方法，也不包括与轮胎车轮组件相关的方法。 本国际标准规定的测试方法不适用于轮胎的分级或质量等级的定义。 [外文原描述]： This International Standard specifies test methods carried out under controlled conditions for verifying the uniformity of tyres for passenger cars, commercial vehicles and motorcycles. NOTE — Lack of uniformity around a tyre produces variations in forces applied by the tyre to the vehicle and this influence is repeated with each revolution of the tyre. At the present state of the art, however, it is impossible to manufacture perfectly uniform tyres. A rigid control of the complete manufacturing process can only minimise the unavoidable imperfections of materials, components and processes affecting uniformity. Methods for measuring the geometrical run-out of the tyre in both radial and lateral directions are covered, as well as methods for measuring the following parameters: -radial force variation; -lateral force variation; -ply steer; -conicity. Not all of these measurements will necessarily be relevant in every situation. This International Standard does not include methods for measuring the static and the dynamic unbalance nor methods related to tyre-wheel assemblies. The test methods specified in this International Standard are not intended for the gradation of tyres or the definition of quality levels.