Metal tools and implements – making – Blank or process – Drill
Patent
1987-12-15
1989-03-28
Parker, Roscoe V.
Metal tools and implements, making
Blank or process
Drill
364149, 36447401, B21K 502
Patent
active
048153427
ABSTRACT:
A method for modeling and building drill bits. An array of spatial coordinates representative of selected surface points on a drill bit body and on cutters mounted thereon is created. The array is used to calculate the position of each cutting surface relative to the longitudinal axis of the bit body. A vertical reference plane which contains the longitudinal axis of the bit body is established. Coordinates defining each cutter surface are rotated about the longitudinal axis of the bit body and projected onto the reference plane thereby defining a projected cutting surface profile. In manufacturing a drill bit, a preselected number of cutters are mounted on the bit body. A model of the geometry of the bit body is generated as above described. Thereafter, the imbalance force which would occur in the bit body under defined drilling parameters is calculated. The imbalance force and model are used to calculate the position of an additional cutter or cutters which when mounted on the bit in the calculated position would reduce the imbalance force. A cutter or cutters is then mounted in the position or positions so calculated.
REFERENCES:
patent: 4350215 (1982-09-01), Radtke
Brett James F.
Sinor Lawrence A.
Warren Tommy M.
Amoco Corporation
Brown Scott H.
Hook Fred E.
Parker Roscoe V.
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