We found a match
Your institution may have access to this item. Find your institution then sign in to continue.
- Title
Forensic Analysis of a CNC Lathe Window Guard Failure.
- Authors
Batzer, Stephen A.
- Abstract
An analysis of an industrial lathe accident is presented in this paper. During operation, the rotating chuck lost its grip upon the cylindrical workpiece. The detached workpiece impacted the inside of the lathe cabinet, rebounded, struck the composite viewing window, and penetrated it. While observing the machining process through the window, the machinist was struck in the chest by the workpiece. He fell backward, suffering a severe traumatic brain injury when the back of his head impacted the concrete floor. The forensic analysis incorporated an event reconstruction to include an estimate of the ejection angle, velocity, and kinetic energy of the workpiece, the impact energy capacity of the window, and a failure analysis of the window and its frame. A kinetic energy analysis was performed by destructive testing of door/window replicas and high-speed videography. Impact testing of exemplar workpieces against alternative design highly impact-resistant windows was also performed
- Subjects
LATHES; BRAIN injuries; KINETIC energy; CONCRETE floors; HEAD injuries; WINDOWS; IMPACT testing
- Publication
Journal of the National Academy of Forensic Engineers, 2023, Vol 40, Issue 1, p1
- ISSN
2379-3244
- Publication type
Article
- DOI
10.51501/jotnafe.v40i1.838