During the past few years, Premier Shot Company has developed new technology for evaluation of both size and shape of shot called Image Analysis (IA). IA uses a video camera to display a layer of shot onto a high resolution monitor. A "PC" computer, using special imaging software, is then able to quickly evaluate both the size and shape of the particles viewed on the monitor.
|
Shot size is reported as particle diameter or radius. Shot shape is measured as a "Shape Factor" or "Roundness" between 0 and 1.000. A perfect circle has a Roundness of 1.000 and a line has a Roundness of 0. |
Roundness Values for common shot particles are shown below: |
||
 0.796 |
 0.869 |
 0.904 |
 0.791 |
 0.912 |
 0.976 |
One of the most commonly used specifications for shot peening is MIL-S-13165 which defines Acceptable, Marginal and Unacceptable shapes. The shapes shown in this specification have Acceptable particles exhibiting Roundness values above 0.830 and Marginal and Unacceptable particles exhibiting Roundness values below 0.830.
In the manufacture of Cut Wire Shot, IA can be used to evaluate the degree of conditioning of a batch of shot. As-cut particles typically have Roundness values below 0.800 where Normal Conditioning values are over 0.900 and Special Conditioning over 0.950.
Image Analysis can be used to evaluate size and shape of new media, used media, and by media suppliers to control the shape of their product. It has also been demonstrated that IA is more accurate and repeatable than traditional methods for size and shape evaluation - Sieve Analysis and Visual Inspection.
Advantages and
Benefits | Cost Savings | Cut Wire Shot | Product List
New Technology
| Premier Shot Company | Quotation & Information
