Guide-bar device for automatic lathe and method of fabrication t

Details Guide-bar device for automatic lathe and method of fabrication t Guide-bar device for automatic lathe and method of fabrication t

1988-06-22

1991-09-17

Schmidt, Frederick R.

Turning

Lathe

With work feeder or remover

82126, 4147451, B23B 1302

Patent

active

050483838

ABSTRACT:
The device comprises essentially a body or shaped piece of cylindrical form and of a circular or polygonal cross section, comprising tubular cavities of different diameters for receiving the bars to be machined of different diameters. The tubular cavities can comprise longitudinal distribution channels for feeding oil under pressure to the bar to be machined. The cylindrical body further comprises indexing grooves at its external periphery, means of distribution of oil at the rear part of the device, an oil collector located at the front part of the device and cavities permitting the return of the oil to a hydraulic group. Reinforcing ribs are provided between the tubular cavities and between the latter and a mantle of the cylindrical body so that the latter has a great moment of inertia which ensures a good stability of the device. The tubular cavities may comprise tubes aligned along the longitudinal axis of the cavities and rotating freely with play in these tubular cavities. These tubes are the proper guiding tubes and they protect the tubular cavities against the damages which could be caused by the fast rotating bars to be machined. These tubes permit also to create a double hydrodynamic bearing permitting to impart very great speeds of rotation to the bars to be machined.

REFERENCES:
patent: 3693810 (1972-09-01), Gumhold
patent: 3874519 (1975-04-01), Mikami
patent: 4577536 (1986-03-01), Lechot
patent: 4889024 (1989-12-01), Geiser

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