User:CSK45Kays/sandbox/Machine hammer peening (MHP)

Machine hammer peening (MHP) is a manufacturing process for modifying metal surfaces, thereby improving their fatigue performance. The main benefits of the treatment are the induction of compressive residual stresses, the increase in hardness of the upper surface layer and the smoothening of the surface up to mirror-like quality.

Operating Principle: In MHP, a workpiece surface is struck at high frequency by a (usually spherical) hammering tool. The hammering tool is moved along the workpiece surface by means of an actuator such as a robot or machine tool so that a series or field of plastic indentations is created. Electromagnetic, pneumatic and piezoelectric systems are possible methods for driving the hammering tool.