Rotary drill bit with cutting insert having edge preparation
作者： Nicholas J. Paros , Glenn W. Sheffler , Stephen M. George , Don C. Rowlett
DOI:
关键词: Surface (mathematics) 、 Edge (geometry) 、 Geometry 、 Structural engineering 、 Rake angle 、 Insert (composites) 、 Drill bit 、 Geology
摘要: A rotary drill bit for engaging an earth strata material includes elongate body having axial forward end and rearward end, a cutting insert attached to the of body. The has rotatable about central axis pair symmetrical halves axis, each half including leading face, top surface relief surface, T-land extending between face edge formed at intersection surface. can have negative rake angle. include primary secondary
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