Abstract:
The identification of steel type by practicable and dependable spark testing
corresponding to JIS G 0566 standard can be carried out with a simple approach.
However, short-term interval sparks require sharp detecting skills, resulting in an
unfavorable method. Therefore web camera was applied to investigate the sparks in
conjunction with the JIS G 0566 standard. The clips were transferred into sill pictures
prior to the analysis via the spark classification program. The 12- million high density
pixel web cameras were utilized. The spark analyzing program, making use of the
criteria of the flicker length, angle and color could identify 14 kinds of steel. In this
regard, the high speed 27,000 rpm mini grinder and 30 mm A36N grinder wheels were
employed. As results, the SS 400 average for length = 40.88 cm while the shortest spark
was generated by SUJ 2 = 24.7 cm. The average angle caused by SCM 440 = 46.50°
compared with 33.4° produced from SK 4. In short, the designed experiment could
distinguish all grades of steel. Regarding stainless steel, however, SUS 304 and SUS
316 L categories cannot be differentiated due to their closest in spark resemblance.