Cutting by use of rotating axially moving tool – Tool-support with means to move tool relative to tool-support – To move radially
Patent
1988-12-30
1990-07-17
Howell, Daniel W.
Cutting by use of rotating axially moving tool
Tool-support with means to move tool relative to tool-support
To move radially
82 14, B23B 5100
Patent
active
049417827
ABSTRACT:
A boring type tool includes mean for biasing a cutting bit in a first radial direction with respect to an axis of rotation and means for adjustably moving the cutting bit to a predetermined desired position against the force of the biasing means. The adjustable moving means includes a fluid pressure source for an incompressible electrorheological fluid and a means communicating with the fluid pressure source and the cutting bit for the flow of electrorheological fluid for adjustably moving the cutting bit in a direction opposing the first radial direction in proportion to pressure being generated by the fluid pressure source. A valve means is operably associated with the communicating means for effecting changes in the dynamic stiffness of the electrorheological fluid in response to an electric field. An electric field producing means is provided for transmitting a sufficient electric field to the valve means to substantially block the flow of electrorheological fluid to the cutting bit from the fluid pressure source and maintain a predetermined radial position of the cutting tool.
REFERENCES:
patent: 3740161 (1973-06-01), Milewski
patent: 4224846 (1980-09-01), Eysel et al.
patent: 4664236 (1987-05-01), Stangroom
patent: 4687589 (1987-08-01), Block et al.
patent: 4720087 (1988-01-01), Duclos et al.
patent: 4733758 (1988-03-01), Duclos et al.
"Fluids That Thicken Electrically" by T. G. Duclos, D. N. Acker & J. D. Carlson, Machine Design/Jan. 21, 1988, pp. 41-46.
GTE Valenite Corporation
Howell Daniel W.
Walter Robert E.
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