Gear cutting – milling – or planing – Milling – Cutter spindle or spindle support
Patent
1990-04-04
1991-07-30
Briggs, William
Gear cutting, milling, or planing
Milling
Cutter spindle or spindle support
B23C 526, B23B 3102
Patent
active
050355570
ABSTRACT:
A rotary chuck for axially clamping a tool includes a spindle terminus forming part of a rotary machine tool spindle; a clamping element holder immobilized in the central bore of the spindle terminus; and a plurality of clamping elements circumferentially evenly distributed about the holder. Each clamping element is a one-armed spreading lever having a first end pivotally supported in the holder to provide for a pivotal movement of each clamping element in a plane containing the spindle axis. Each clamping element has a second end having a radially outwardly swung clamping position in which each second end is adapted to be clamped against an inner shoulder of a hollow tool shank received in the spindle bore for axially pulling the tool into engagement with a frontal end face of the spindle terminus. Each second end has a radially inwardly swung releasing position in which the tool is released from the chuck. There is further provided a clamping drive extending coaxially with the spindle axis and being operatively coupled to the clamping elements. The clamping drive is axially movable in a first direction for displacing the clamping elements into the clamping position and in a second direction for displacing the clamping elements into the releasing position.
REFERENCES:
patent: 3323419 (1967-06-01), Riedel
patent: 3533638 (1970-10-01), Sedgwick
patent: 3791257 (1974-02-01), Frazier et al.
patent: 4406195 (1983-09-01), Kruger et al.
patent: 4844671 (1989-07-01), Reinauer
patent: 4863323 (1989-09-01), Glaser
Jager Horst
Kohlbauer Johann
Briggs William
Hertel AG Werkzeuge & Hartstoffe
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