Guide bar tube for automatic lathe
AssigneeSameca SA
InventorMarkus Geiser
Life of this patent
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Abstract
The invention relates to a guide-bar tube for an automatic lather. The guide-bar tube includes a centering traveler comprising balls distributed in two parallel planes in a manner which allows the centering traveler to be locked either to the guide-bar tube or to the rod of a feed piston. This arrangement allows the displacement of the feed piston both for advancing the bar stock towards the lather and for retraction of the piston towards the rear of the device by vacuum. The presence of the traveller, which is normally mounted on the rod of the feed piston, eliminates buckling and floating of the bar stock and of the feeder rod in the guide-bar tube. This structure results in a considerable increase in the number of turns of the bar and a great reduction of noise.
Claims8
A device for feeding a bar stock to a headstock of a lathe comprising:
- a guide tube having grooves formed on an inner surface;
- a feed piston for feeding said bar stock to said headstock through said guide tube, said feed piston including a front portion and a head portion with grooves formed on an outer surface thereon, and said feed piston having a diameter equal or less than the diameter of said bar stock;
- and
- a centering traveller having floating elements which partially engage said grooves of said guide tube and partially engage said grooves of said feed piston, whereby said centering traveller locks to the front portion of said feed piston when the head of said feed piston is in said guide tube and locks to said guide tube when the head of said feed piston penetrates into said headstock.
Dependencies are inferred from the claim text.