Probe mechanism for machine tool
View Patent ↗A contacting or non-contacting probe ( 2 ) is mounted to a spindle ( 6 ), preferably a tool spindle, of a machining device, such as a chamfering device ( 4 ), whereby it has a home position retracted out of the way of the machining (e.g. chamfering) process and an active position where it can contact a workpiece before or after the machining (e.g. chamfering) process.
1. A machine tool comprising:
a workpiece spindle for rotation of a workpiece about a workpiece axis;
a tool spindle for rotation of a tool about a tool axis;
a probe mechanism positioned on a probe spindle, said probe spindle being located about at least one of said workpiece spindle and said tool spindle;
said probe spindle being rotatable about the respective axis of rotation of said at least one of said workpiece spindle and said tool spindle;
said probe spindle being movable in the direction of said respective axis of rotation between a retracted position whereby rotation of said probe spindle is prevented, and an advanced position whereby said probe spindle is in engagement with said at least one of said workpiece spindle and said tool spindle and is rotatable therewith.
2. The machine tool of claim 1 wherein said probe spindle is maintained in said retracted position by spring force.
3. The machine tool of claim 2 wherein said probe spindle is displaced to said advanced position via fluid pressure in an amount sufficient to overcome said spring force.
4. The machine tool of claim 3 wherein said fluid pressure comprises air pressure.
5. The machine tool of claim 1 wherein said probe spindle is rotatable about said respective axis by a predetermined amount.
6. The machine tool of claim 5 wherein said predetermined amount is defined between a home position and a probing position.
7. The machine tool of claim 6 further comprising:
said at least one of said workpiece spindle and said tool spindle further including a non-rotatable spindle housing having a forward surface and said probe spindle further including a rearward surface, said forward surface and said rearward surface facing one another;
a pin extending from one of said forward surface and said rearward surface;
a bore of predetermined depth located in the other of said forward surface and said rearward surface;
said pin being inserted into said bore in said retracted position whereby rotation of said probe spindle is prevented.
8. The machine tool of claim 7 wherein in said advanced position, said pin is removed from said bore and resides in and is moveable along an arcuate slot located in the same surface as said bore, said arcuate slot having a first end coincident with said bore and defining said home position and a second end defining said probing position, said arcuate slot being of a shallower depth than said bore.
9. The machine tool of claim 6 further comprising:
said at least one of said workpiece spindle and said tool spindle further including a hard stop having an internal surface and said probe spindle further including a forward stop surface facing said internal surface whereby axial displacement of said probe spindle is stopped by contact between said forward stop surface and said internal surface thereby defining said advanced position.
10. The machine tool of claim 9 further comprising at least one pin or key projecting from one of said forward stop surface and said internal surface and at least one corresponding slot located in the other of said forward stop surface and said internal surface whereby in said advanced position, said at least one pin or key is inserted into said corresponding slot thereby rotationally locking said probe spindle to said at least one of said workpiece spindle and said tool spindle.
11. The machine tool of claim 1 wherein said probe mechanism comprises a contact probe.
12. The machine tool of claim 1 wherein said probe mechanism comprises a non-contact probe.
13. The machine tool of claim 1 further comprising a ball-sleeve positioned between said probe spindle and said at least one of said workpiece spindle and said tool spindle.
14. The machine tool of claim 1 wherein said workpiece spindle and said tool spindle are movable relative to one another linearly along one or more mutually perpendicular axes and angularly about a pivot axis.