Turning – Lathe – Tool rest
Patent
1988-03-22
1990-04-24
Bilinsky, Z. R.
Turning
Lathe
Tool rest
279 71, 279 81, 279 1B, 409234, B23B 2920
Patent
active
049190237
ABSTRACT:
A quick-change adapter which allows the precise positioning of a working member such as a tool, a workpiece or the like with respect to a machining device has a precision of one or two ten-thousandths of an inch. The adapter includes first and second holders affixed to the working member and the machining device. Each of the first and second holders includes a mating surface, configured as a helical face gear or as a cylindrical stud and recess. A shank extends from the first holder and has a V-shaped notch on which pins on the second holder abut, so as to draw the first and second holder engagement surfaces into firm abutment. The pins are preferably driven by a floating cam ring carried by the second holder, so that positioning of the holders with respect to one another is determined substantially only by the engagement surfaces. Misalignment of the holder due to movement caused by non-axial drawing on the shank is eliminated. Also preferably, the cam surfaces of the cam ring are more sharply cambered in their initial portions, and less cambered as the pins draw on the shank so as to bring the engagement surfaces of the holders into firm abutment, thereby simultaneously increasing the speed of use of the adapter while more positively assuring firm abutment of the engagement surfaces of the holders.
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