Gear cutting – milling – or planing – Milling – Including means to infeed rotary cutter toward work
Patent
1994-06-02
1996-01-09
Howell, Dainel W.
Gear cutting, milling, or planing
Milling
Including means to infeed rotary cutter toward work
409204, 409231, B23C 102
Patent
active
054824150
DESCRIPTION:
BRIEF SUMMARY
FIELD OF THE INVENTION
The invention relates to the machine-tool building and more specifically to a spindle head of a metal-cutting machine.
PRIOR ART
Known in the prior art is a spindle head (SU, A, 515,595) comprising a spindle installed in a housing, a device for regulating the position of the spindle in a plane perpendicular to the axis thereof and made in the form of portions eccentrically arranged one in the other and provided with circular guideways one of which is installed in the housing, while the other one carries a spindle arranged therein. The value of eccentricity in the arrangement of the portions is equal to the value of eccentricity in the arrangement of the spindle, and the portions are provided with mechanisms and drives for their turning. This spindle head suffers from an insufficient rigidity and therefore cannot be used in the NC machine-tools for providing a high operational precision.
Also known in the prior art is a spindle head (SU, A, 1,495,019) comprising a spindle installed in a housing, a device for regulating the position of the spindle in a plane perpendicular to the axis thereof and made in the form of a spindle quill and a faceplate eccentrically arranged one in the other one and provided with a circular guideways. The faceplate is installed in the housing and the spindle quill carries a spindle arranged eccentrically therein, and the value of eccentricity in the arrangement of the faceplate and the spindle quill is equal to the value of eccentricity in the arrangement of the spindle. The faceplate and the spindle quill are provided with mechanisms for their turning, as well as with drives and angular position transmitters. The kinematic chain connecting the spindle with the drive is provided with a hollow double-gear cluster and a driving shaft of the spindle quill turning mechanism is arranged inside the double-gear cluster. The main motion drive comprises a shaft mounted on the faceplate coaxially with the spindle quill. Besides, readings of angular displacements of the faceplate and the spindle quill are provided with the aid of rotary angular position transmitters.
With the spindle head of such a design, the transmitters can be arranged only on axes of appropriate driving motors or on the shafts kinematically associated with the spindle quill and the faceplate, therefore a high-precision control of the position of a movable link cannot be ensured because of an adverse effect of the backlash in the transmission. Arrangement of the faceplate angular position transmitter by way of a direct connection of the transmitter rotor to the faceplate is impossible because of the presence in this place of the hollow double-gear cluster and the shaft of the turning mechanism, while arrangement of the spindle quill angular position transmitter is impossible because of the presence in this place of the main motion drive shaft.
DISCLOSURE OF THE INVENTION
The present invention is essentially aimed at providing such an arrangement of rotors and stators of the faceplate and spindle quill angular position transmitters in the spindle head of a metal-working machine-tool which will ensure a minimal backlash in the connection of a drive of the spindle quill turning mechanism and a direct measurement of the angular position of the faceplate and the spindle quill.
This aim is attained by that in a spindle head of a metal-working machine-tool comprising a housing which internally accommodates a faceplate installed for rotation on a circular slideway and which in turn internally accommodates a spindle quill installed eccentric to the axis of rotation on a circular slideway for rotation and carrying therein a spindle, turning mechanisms of the faceplate and the spindle quill, angular position transmitters of the faceplate and the spindle quill comprising rotors and stators interacting therewith, and connected with a control system through the medium of a cable, and a driving shaft of the spindle quill turning mechanism is arranged inside a hollow double-gear cluster kinematically associa
REFERENCES:
patent: 3803981 (1974-04-01), Allgeyer
patent: 4789278 (1988-12-01), Dexter et al.
patent: 5197836 (1993-03-01), Crivellin
Abramian Levon M.
Belaga Vladimir B.
Chevrenidi Gennady S.
Fux Igor L.
Popov Sergei G.
Howell Dainel W.
Maloe predpriyatie "Puler Ko., Ltd. "
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