On the Drilling of Metals: 1—Basic Mechanics of the Process

Autor: C. J. Oxford
Rok vydání: 1955
Zdroj: Journal of Fluids Engineering. 77:103-111
ISSN: 0097-6822
Popis: The cutting action of a twist drill is very complex. This paper describes an investigation of this complex phenomenon through use of a quick-stop technique to freeze the action. The formation of chips, both along the cutting edges and under the chisel edge, is considered. Chip-flow angles, measured experimentally, are related to effective rake angle along the cutting edges, using a new derivation of the normal rake angle for a twist drill. The effects of point angle, drill design, and workpiece material are considered. The split (crankshaft) point for heavy web drills is investigated and its operation described.
Databáze: OpenAIRE