Labeling process where a needle is driven into the surface to create a pattern. Beskrivning The process A pulsating current running through a coil [1] where a magnetic marking pin [2] runs freely inside. The pulsating current creates a magnetic field that repels the marking pin. Marking pin tip, typically made of carbide or diamond presses thus into the workpiece, leaving a depression in the surface. The stylus returns after impact to the top position and is then moved according to a preset path to make repeated strokes creating characters or patterns. The strokes are usually repeated with a frequency of about 200Hz. There are dot peening for both manual and fully automatic labeling. Dot peening Advantages and disadvantages In comparison with alternative methods Creates a label with very low stresses Flexible process Can be fully automated Adjustable marking depth Low definition of mark Very Loud process Not optimal for plastics Object requires clamping
