TRAVEL A real time particle velocity measuring system for use in shot peening.

Author:  Y.Lecoffre, X.Bonazzi, F.Jouet, D. Huet
Source:  The Shot Peener magazine, Vol 07/Issue 2, Summer 1993
Doc ID:  1993122
Year of Publication:  1993
Abstract:  
ABSTRACT: This paper presents a new device for measuring shot velocity in air blasting and wheel blasting operations. This device is based on an original concept developed and patented by Helispire. The commercial name of the product is TRAVEL. The application of TRAVEL to shot peening has been made under a joint development program between Wheelabrator Allevard and Helispire. The system is a non-contact optical device where continuous measurements can be made 10cm away from the shot jet. It gives the velocity of individual shots passing through the 4mm measuring volume. Dedicated software has been developed for data processing and for the presentation of the results. Mean velocity and standard deviation, as well as shot velocities histograms, can be instantaneously displayed. Experiments have been carried out in the Wheelabrator Allevard test center in a true shot peening environment. The corresponding design of experiments includes all the principal parameters, such as type of nozzle, distance, flow rates and shot sizes. The results obtained are briefly described in this paper. This new device will help to solve the everlasitng question of an instantaneous measurement of shot kinetic energy in the peening process.