Cutting by use of rotating axially moving tool – Tool or tool with support – Having inversely angled cutting edge
Patent
1975-03-27
1977-02-22
Simpson, Othell M.
Cutting by use of rotating axially moving tool
Tool or tool with support
Having inversely angled cutting edge
29 26A, 90 11D, 408239R, B23C 526, B23Q 108
Patent
active
040086461
ABSTRACT:
There is disclosed a spindle unit for machine tools in which there is a spring operated drawbar in the spindle having finger hooks for engaging the adapter of a toolholder for drawing the latter into a tapered socket at the nose of the spindle with means for locking the finger hooks in engagement with the toolholder adapter and automatically operated means for relieving the pressure of the hooks against the toolholder adapter and providing push rod means to cause the finger hooks to move clear of the adapter and apply a force to the toolholder so that the latter, with the tool carried thereby, may be removed from the spindle socket. The spindle is advanced toward the work and retracted therefrom by a tubular quill provided with a helical groove to cooperate with a ball-nut means formed integrally with a pulley which is connected by a timing belt driven by a pulley on the shaft of a stepper motor, the advancement of the spindle depending on the number of step-like movements of the motor. Preset means controls the rotative positions of the spindle to orient the spindle in tool ejection and retention operation.
Means are disclosed for relieving the quill and quill nut and spindle bearings of the excessive force which would be applied to the spindle when the end of the spindle is engaged to relieve the pressure of the adapter engaging finger hooks on the adapter.
REFERENCES:
patent: 3490333 (1970-01-01), Scruton
patent: 3678801 (1972-07-01), Hague et al.
patent: 3859001 (1975-01-01), Hoddinott et al.
patent: 3893371 (1975-07-01), Frazier
Hague Robert Z.
Loos George J.
Marsicano Matthew F.
Bilinsky Z. R.
Johnson Arthur A.
Simpson Othell M.
Textron Inc.
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