Turning – Severing or cut-off – Interrelated means for tool infeed and circumrotation
Patent
1976-01-26
1977-01-04
Vlachos, Leonidas
Turning
Severing or cut-off
Interrelated means for tool infeed and circumrotation
B23B 2304
Patent
active
040006697
ABSTRACT:
Improvement in a machine tool center device having a hollow body and a center shaft therein, the shaft having a conical front end, a bearing between the body and shaft for moveably supporting the latter, the improvement comprising a center device which has an arrangement for converting the same from a live center to a dead center and vice versa, an arrangement for supporting the shaft in the body for both rotation and reciprocation in respect thereto, the conversion arrangement preventing rotation of the shaft while permitting reciprocation thereof, the conversion arrangement being accessible from the exterior of the body for insertion or removal in respect thereto, a yieldable mechanism in the body operative upon the shaft for urging the front end outwardly of the body, a thrust cap rotatably carried on the front end of the body having an aperture therein through which the front end projects, the thrust cap being held fast against reciprocative movement relative to the body, a nose cap carried on the thrust cap, the nose cap having an aperture therein through which the front end projects, the shaft, in use of the center device, being yieldably retracted in respect to the body by the workpiece so that the latter abuts the nose cap, the nose cap serving as a locator for the workpiece and rotating therewith.
REFERENCES:
patent: 2463385 (1949-03-01), Holohan
patent: 2520473 (1950-08-01), Shepard
patent: 2704006 (1955-03-01), Rost
patent: 3316785 (1967-05-01), Nakane
patent: 3519096 (1970-07-01), Lunzer
patent: 3943804 (1976-03-01), Wolski et al.
Fisher William L.
Vlachos Leonidas
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