Teeth Quenching Slewing Ring Bearing for Industrial Manipulator,Robotics

Upon an analysis of a failure to the slewing bearing, some engineer puts forward a countermeasure in which a three-row roller slewing bearing replaces the original ball/roller combined slewing bearing, thereby greatly extending the slewing bearing's service life and guaranteeing the smooth running of the onsite equipment.

Its actual running often appears with some faults such as overload, abnormal impact, groove wear, noise, material properties, subsurface stresses. This paper mainly analyzes the causes of the faults from three aspects of the bearing's installation mode, its load condition, and its lubrication maintenance. So the solution is putted forward to improve the slewing bearing's accuracy.

A computational procedure for calculation of Slewing Bearing Failure is presented. The calculation is based on the strain-life approach, and it takes into consideration depth-dependent material properties of the slewing bearing raceway.

The slewing bearing friction coefficient can be estimated for a slewing ring bearing using the formula noted below. The resulting values assume that the bearing is mounted according to the guidelines outlined in this catalog. This estimate only applies when load is applied to the bearing, and does not reflect starting torque in an unloaded condition.

Also not considered are slewing bearing friction coefficientgenerated by the lubricant, seals and weight of the components. This does however provide a starting point, and with additional experience adjustments can be made in the assembly to accommodate for additional torque.

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