S. J. Sam Easley, Boeing, Berkekely, MO
Milling, fabrication, inspection and assembly of parts on the order of 10 to 500 microns (with features smaller than 5 microns) results in particular problems not experienced with larger parts. The purpose of this presentation is to address some of these problems, identify areas that will require further research and to review what Boeing has done in the area of small parts manufacturing research to date. Problems associated with small tools, on the order of 10 to 500 microns, end mills and drills running at speeds of 160,000 RPM's will be discussed. Handling and assembly of micro sized parts will also be discussed. Where a small amount of pressure can serve to make tight parts fit together in large parts, but will deform and destroy micro-scale parts. Inspection of these parts is difficult due to the size of the current inspection tools. Optical inspection techniques will be discussed. Other issues such as workpiece fixturing , assembly and inspection will be presented. Areas for application of small parts and mechanisms within the Boeing Company will be addressed as well.
Summary: Milling, fabricating, inspecting and assembling of parts on the order of 10 to 500 microns and finding the right applications to use these new parts and manufacturing technique will be the purpose of this paper. We will look at the unique problems in using end mills and drills on the order of 10 microns in diameter. Topics such as workpiece fixturing, tool life, tool breakage, process parameters, part quality and part assembly will be addressed in depth. Areas for application of small parts and mechanisms within the Boeing Company will be addressed as well.