The abnormal noises, such as clunking and popping, are usually generated when the car turns or drives over bumps. It could happen frequently when the free gap (clearance) values in the axial direction of the lower control arm ball joint are higher than normal values. The spherical surface of the ball stud is commonly assumed to have been corroded by foreign substances such as water, and the rough surface of the corroded ball stud accelerates the abrasion of the bearing contact portion to increase the free gap. Thus, the dust cap material and shape have been improved over time. However, there are still recurrences. The objective of this study was to evaluate two ball studs with different plating thicknesses and one uncoated sample from the reproducibility test simulating vehicle behavior conditions under environment test conditions. The findings of this study were as follows: First, the ball stud plating is advantageous in corrosion resistance, however, the thickness of the plating is uneven and the surface becomes rough with time, thereby accelerating the abrasion of the bearing contact portion. Second, as the surface of the ball stud wears, oscillating torque decreases and the axial free gap increases, which is more disadvantageous as the thickness of the ball stud sphere becomes thicker. Therefore, uncoated ball joint was defined as the best option.

当汽车转弯或驶过颠簸时，通常会产生异常声音，例如嘶嘶声和爆裂声。当下控制臂球窝接头的轴向自由间隙（间隙）值大于正常值时，可能会经常发生这种情况。通常假定球头螺栓的球形表面已经被诸如水的异物腐蚀，并且被腐蚀的球头螺栓的粗糙表面加速了轴承接触部分的磨损，从而增加了自由间隙。因此，防尘帽的材料和形状随着时间的推移而得到改善。但是，仍然有重复发生。这项研究的目的是评估在环境测试条件下模拟车辆行为条件的再现性测试中，两个镀层厚度不同的球头螺栓和一个未镀层样品。该研究的结果如下：首先，滚珠螺柱镀层在耐腐蚀性方面是有利的，但是，镀层的厚度不均匀并且表面随着时间而变粗糙，从而加速了轴承接触部分的磨损。其次，随着球头螺栓表面的磨损，振荡扭矩减小并且轴向自由间隙增大，这随着球头螺栓球体的厚度变厚而更加不利。因此，未涂层的球窝接头被定义为最佳选择。摆动扭矩减小，轴向自由间隙增加，当球头螺栓球体的厚度变厚时，这将更加不利。因此，未涂层的球窝接头被定义为最佳选择。摆动扭矩减小，轴向自由间隙增加，当球头螺栓球体的厚度变厚时，这将更加不利。因此，未涂层的球窝接头被定义为最佳选择。