Conventionally Drilled Stainless Steel with the Influence of Subsequent Processing

摘要

A stainless steel parts production plant had to scrap between 8 to 15% of its finished parts due to non-straight deep holes whose nonalignment could only be detected by x-ray inspection of the finished part. The purposes of this study were to determine the causes of hole straightness error in small diameter (d < 0.10 in.) deep (L/d > 20) conventionally drilled holes in stainless steel and to eliminate the drilling errors. The causes of hole straightness error and drilling parameters which affect straightness were studied. It was concluded that accurate small diameter deep holes require custom ground drills and that each drill must be inspected and certified as being within tight tolerances. (ERA citation 06:002714)