Drill bit for fiber reinforced plastics.
Номер патента: EP0107651A4
Опубликовано: 30-07-1985
Автор(ы): Michael L Skidmore
Принадлежит: Ford France SA, Ford Motor Co, Ford Motor Co Ltd, Ford Werke GmbH
Опубликовано: 30-07-1985
Автор(ы): Michael L Skidmore
Принадлежит: Ford France SA, Ford Motor Co, Ford Motor Co Ltd, Ford Werke GmbH
Реферат: A rotary drill bit (100) suitable for drilling fiber reinforced plastic (6), which drill bit comprises a spade drill head (2) comprising a primary cutting edge (9); a disc-shaped base (3) intergral with and axially aligned with said drill head, having a diameter substantially equal to the width of said drill head wherein the radially outer edge (5) of the rearward face of said base is of sufficiently small radius to form a fiber-cutting reverse cutting edge; a collar (4) integral with and axially aligned with said base, having diameter substantially less than that of said base; and, preferably, a shank (14) integral with and axially aligned with said collar, having diameter less than or equal to that of said base.
Step drill bit and method for drilling a workpiece by using a step drill bit
Номер патента: US12053831B2. Автор: Hongjia Wang. Владелец: Individual. Дата публикации: 2024-08-06.