Rotary Peening Method
The rotary peening process is a mechanical surface treatment where eccentrically rotating carbide pins or balls act on the workpiece. It is often used where conventional blasting cabinets are not practical.
Physicochemical Mechanism of Action
The rotary ball method uses eccentrically rotating carbide pins or balls to machine the workpiece. The balls constantly change position and lead to even material removal on the workpiece surface.
Metallurgical Relevance & Welding Risks
Machining with rotary balls can change the surface structure by removing material and smoothing the surface. This can improve the weld strength, since a smooth surface absorbs less stress. However, there is a risk of over-machining if the balls are too hard or machine too long, which can lead to deformation or damage of the workpiece.
Workshop Practice & Instructions
When using the rotary ball method, check and change the carbide pins or balls regularly to make sure they are not damaged. The machining time should be kept exactly to avoid deformation from over-machining. Recommended values for the ball hardness are 50-60 HRC, and the ball speed should be between 1000 and 3000 rpm.