手持便携式电动工具.振动辐射的评价用试验方法.第2部分:扳手、螺母机和螺丝刀

[中文适用范围]： 本部分ISO 28927规定了一种实验室方法，用于测量用于拧紧和松开螺纹紧固件的手持动力扳手、螺母扳手和螺丝刀在手柄处的传递振动发射。这是一种类型测试程序，用于确定机器在指定负载下操作时握持区域的振动大小。该方法仅针对紧固任务进行了测试。其结果旨在用于比较同一类型机器的不同型号。本部分ISO 28927适用于手持式机器（见第5章），由气动或其他动力驱动，具有冲击或脉冲作用，属于截止型、棘轮型或堵转型，且设计形式包括直式、手枪式、角度式或弓式手柄。它涵盖具有6.3 mm至40 mm（1/4英寸至1 1/2英寸）公制或母制驱动输出轴以及其他几何形状的机器。不适用于设计为仅用于扭矩反作用臂的螺母扳手。 [外文原描述]： ISO 28927-2:2009 specifies a laboratory method for measuring hand-transmitted vibration emission at the handles of hand-held power-driven wrenches, nutrunners and screwdrivers used for tightening and loosening threaded fasteners. It is a type-test procedure for establishing the magnitude of vibration in the gripping areas of a machine when operating at a specified load. The method has been tested for fastening tasks only. It is intended that the results be used to compare different models of the same type of machine. ISO 28927-2:2009 is applicable to hand-held machines, driven pneumatically or by other means, with impact or impulse action, of shut-off, ratchet or stall type, and of all designs — straight, pistol‑grip, angle or bow handle. It covers machines with 6,3 mm to 40 mm (1/4 in to 1½ in) male or female drive output shafts, as well as other geometries. It is not applicable to nutrunners designed to be used only in torque reaction arms.