Screw slotting machine

Abstract

Abstract TWO CIRCULAR SAW BLADES OF THE SAME DIAMETER ARE EMPLOYED IN SPACED COPLANAR RELATIONSHIP TURNING IN OPPOSITE DIRECTIONS. THE FIRST SAW IS THINNER AND CUTS A PRELIMINARY SLOT ALONG A WAVY LINE AS A RESULT OF ITS BEING OSCILLATED SLIGHTLY IN THE PLANE OF CUTTING, AND IT LEAVES A BURR AT THE OUTGOING END OF THE SLOT WHICH IS AT A SLIGHT ELEVATION RELATIVE TO THE ULTIMATE BOTTOM OF THE SLOT. THE SECOND SAW IS THICKER AND MAKES A FINISH CUT TO THE DESIRED WIDTH AND, DUE TO CLIMB CUTTING, CLIPS OFF THE BURR LEFT BY THE FIRST SAW, SO THAT THE SLOTTED SCREWS ARE SUBSTANTIALLY FREE OF BURRS. SINCE THE FIRST SAW IS OSCILLATED ABOUT THE AXIS OF THE SECOND SAW IT IS POSSIBLE TO ADJUST THE DEPTH OF THE FIRST CUT TO THE DESIRED EXTENT, ALTHOUGH BOTH SAWS MAY BE ADJUSTED TOGETHER TOWARD THE WORK TO COMPENSATE FOR WEAR ON THE SAWS, AND LATER AWAY FROM THE WORK WHEN NEW SAWS ARE INSTALLED. AN ALIGNER MAY BE PROVIDED USING THE FLATS ON THE HEX-HEADS FOR ALIGNING TO INSURE CUTTING OF THE SLOTS THE LARGE DIAMETER FROM POINT TO POINT OF THE HEX.

Inventors

• 👤 Warren M Jackson

Bibliographic Details