Tool turret with reduced switching times

Details Tool turret with reduced switching times Tool turret with reduced switching times

1993-11-04

1994-08-23

Briggs, William

Metal working

Plural diverse manufacturing apparatus including means for...

With turret mechanism

29 485R, 74813C, 74813L, B23B 2932

Patent

active

053395042

ABSTRACT:
A tool turret includes a turret housing and a turret head rotatably mounted in and relative to the turret housing to selectable angular positions about a rotational axis. A preliminary indexing bolt secures the turret head in one of the angular positions following movement of the turret head between angular positions. A three-phase synchronous motor forms a rotary drive for the turret head and has at least first and second sets of pole pairs. The first set provides a first indexing speed. The second set has a smaller number of pole pairs then the first set and provides a second indexing speed. An interlocking member securely interlocks the turret head in any of angular positions. The interlocking member is axially slidable along the rotational axis between an interlocking position, in which the interlocking member teeth simultaneously engage the teeth and tooth spaces of the turret housing and the turret head and a contact position in which contact surfaces of the interlocking member and the turret housing engage, precluding engagement of the teeth of the interlocking member and the turret housing in any position other than the selectable angular positions of the turret head. Gears couple the motor to the turret head such that the turret head reaches an indexing speed limited by characteristics of the preliminary indexing bolt. A control operates the motor with the first set of pole pairs at a time to ensure deceleration of the turret head to the first indexing speed before movement of the turret head is stopped by the preliminary indexing bolt.

REFERENCES:
patent: 4507993 (1985-04-01), Silverman et al.
patent: 4524655 (1985-06-01), Waldron et al.
patent: 4944198 (1990-07-01), Natale et al.
patent: 4972744 (1990-11-01), Sauter et al.
patent: 4989303 (1991-02-01), Sauter et al.
patent: 4991474 (1991-02-01), Thumm et al.
patent: 5067371 (1991-11-01), Sauter et al.
Lueger, Lexikon der Technik, 4th Edition, vol. 7, pp. 141-142, 1965.

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