Throwaway inserts and throwaway drill

Details Throwaway inserts and throwaway drill Throwaway inserts and throwaway drill

B - Operations, Transporting

23

B

B23B 51/00 (2006.01) B23B 27/14 (2006.01) B23B 51/04 (2006.01)

Patent

CA 2226035

A throwaway drill capable of machining a workpiece stably in a balanced manner even under high-efficiency, high-load conditions and capable of disposing of chips efficiently and smoothly. The drill carries an outer insert and an inner insert. As shown, each insert has a plurality of cutting edges each having a curved crest, a first slope, and a second slope which is at least partially a curved line. The inner and outer inserts are arranged so that the cutting area to be cut by the outer insert alone is partially cut by a cutting edge portion of the inner insert near its corner, and the cutting area which to be cut by the inner insert alone is partially cut by the crest of one cutting edge of the outer insert.

Perceuse jetable capable d'usiner une pièce à travailler de manière équilibrée même sous des conditions de rendement et de charge élevés et d'éliminer les copeaux de manière efficace et régulière. La perceuse comprend des garnitures extérieure et intérieure. Tel que démontré, chaque garniture comprend de nombreux bords de coupe munis chacun d'une pointe courbée, d'une première pente et d'une deuxième pente qui est en partie une ligne incurvée. Les garnitures intérieure et extérieure sont placées de façon que la région à être coupée par la garniture extérieure le soit en partie par une section du bord de coupe de la garniture intérieure près de son coin, et la région à être coupée par la garniture intérieure le soit en partie par la pointe d'un bord de coupe de la garniture extérieure.

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