Small Flute Drill Changer
Original Publication Date: 1987-Feb-01
Included in the Prior Art Database: 2005-Jan-31
An automated mechanism is illustrated and described to remove the old drill from and insert the new drill into a spindle. As shown in Figs. 1-3, pressurizing cavity 9, through line D, compresses two collets 1 together with the drill 7 in it. When the collets assembly is closed and becomes rigid, then all pressure forces (Image Omitted) cancel each other, making this assembly to float in all directions. The 45Œincoming air jets 12 strike on the collets at the recesses 10, turning this assembly at a low rpm to reduce the spindle collets/drill friction when removing or inserting the drill. This assures a smoother drill removal or insertion. The dowel pin 2 is designed to center the holes concentrically in the open condition of the collets, and also keeps them packed together.