Common forms of micro motion damage in deep groove ball bearings

Common forms of micro motion damage in deep groove ball bearings. The micro motion state of precision deep groove ball bearings is actually very complex. Usually, according to a simplified planar contact model and different relative motion directions, micro motion can be divided into four basic motion modes: tangential motion, radial motion, rolling micro motion, and twisting micro motion.

In fact, the latter three types of micro motions often occur or appear in combination with two or more micro motions. There are three main ways in which micro motion can cause damage to precision deep groove ball bearings: micro motion wear of deep groove ball bearings, micro motion fatigue of deep groove ball bearings, and micro motion corrosion of deep groove ball bearings. The micro motion wear of precision deep groove ball bearings is caused by the relative displacement of the contact surface caused by external vibration, and the contact parts bear a large amount of local contact load, which leads to wear of the steel ball and raceway parts in precision deep groove ball bearings.

Micro motion fatigue of precision deep groove ball bearings refers to the micro motion caused by the fatigue alternating stress carried by precision deep groove ball bearings, resulting in damage to the contact surface of precision deep groove ball bearings. Micro corrosion of deep groove ball bearings refers to the damage to the contact surface of precision deep groove ball bearings caused by corrosive media when used in environments such as rainwater and corrosive gases. After being subjected to normal alternating loads, angular contact ball deep groove ball bearings leave circular concave micro motion damage with "pseudo Rockwell indentation" on the inner and outer raceways of precision deep groove ball bearings.

The micro motion wear on the outer ring slows down with increasing load, intensifies with increasing swing angle, and slows down with increasing cycle times. Joint deep groove ball bearings suffer from micro motion wear during movement, which can lead to looseness or inaccurate positioning of the robotic arm, thereby reducing the quality and service life of the product.