Frictional Behavior of Ball Rolling with Plastic Deformation

Abstract

In order to examine the frictional behavior between the ball and the material during the ball rolling process, the rolling friction test apparatus in which the peripheral speed of the ball and the processing load can be measured was developed. In dry and lubricated conditions, soon after the process starts, the difference in the behavior of the horizontal force and the peripheral speed of the ball are observed. It is considered that the contacting conditions vary depending on the amplitude of the plastic flow in the material at the early stage of the process. Since the lubricant oil is captured at the valley part of the roughened surface caused by the forward plastic flow, the surface defects remained at the processed surface in lubricated condition.

Keywords

• dimple forming
• ball burnishing
• rolling friction
• frictional behavior