Vertical lathe

Details Vertical lathe Vertical lathe

2005-07-19

2005-07-19

Fridie, Jr., Willmon (Department: 3722)

Turning

Lathe

Vertical

C082S131000

Reexamination Certificate

active

06918326

ABSTRACT:
There is provided a vertical lathe which, when machining gradually varying lens grooves in a mold for molding of a Fresnel lens, can change the angle of a cutting tool without positional displacement of the cutting tip, enabling high accuracy machining of the gradually varying lens grooves. The vertical lathe includes: a column; a rotary table for rotating a workpiece; a cantilevered cross rail supported by the column; a saddle movable in a horizontal direction along a guideway of the cross rail; a ram suspended from the saddle and movable vertically along a guideway of the saddle; and an inclined head mounted to the lower end of the ram and having an inclined swivel shaft for holding a cutting tool, wherein said swivel shaft is configured to swivel the cutting tool around a nose of the cutting tool as the center of swiveling.

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patent: 5105692 (1992-04-01), Dona et al.
patent: 6189427 (2001-02-01), Kosho et al.
patent: 6257108 (2001-07-01), Otake
patent: 10-142405 (1998-05-01), None

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