Wheelpeening Equipment in Nozzle-Like Configuration

Author:  R. G. Bosshard, Anvil Developments, Volketswil-Swi
Source:  The Shot Peener magazine, Vol 14 / Issue 1, Spring 2000
Doc ID:  2000024
Year of Publication:  2000
Abstract:  
Problem Shot peening commonly will be performed either with air powered or wheel powered technique. The systems are entirely different and in many applications a peening job could be done in both ways whereas particular jobs require the only applicable method. From the technical point of view, wheel equipment works e.g. at a 300 kg/min shot rate with a velocity of 60 m/s thus requiring 20 HP. Air propelled shot at a rate of 5 kg/min, even at a lower projectile speed, will require a 30 HP motor to drive the compressor. Even this figures are very approximate, the difference of energetic efficiency in practical work is at least a factor of over 100. Also an unpleasant effect is the expanded air inside a process cabin or such an necessary enclosure. So the ventilation system with filter and blower will be considerably bigger for air operated machine.