Method and apparatus for extruding gear blanks
Abstract
Abstract A FORGED BLANK FOR FORMING HELICAL GEARS IS DISCLOSED THE BLANK IS PROVIDED WITH SHALLOW HELICAL TIMING GROOVES FORMED BY PRESSING THE BANK THROUGH AN EXTRUSION DIE HAVING INWARDLY PROJECTING HELICAL TEETH. THE MATERIAL DISPLACED TO FORM THE GROOVE FLOWS INWARDLY TOWARD AN AXIAL PASSAGE THROUGH THE BLANK. THE APPARATUS FOR FORMING THE BLANK INCLUDES A NON-ROTATING PUNCH FORMED WITH A PLANAR END FACE AND A DIE ASSEMBLY INCLUDING A PORTION FORMED WITH INWARDLY EXTENDING HELICAL TEETH. THE BLANK ROTATES AROUND ITS AXIS AND RELATIVE TO THE PUNCH AS IT MOVES THROUGH THE EXTRUSION DIE. THE PUNCH DOES NOT ENTER THE TOOTHED PORTION OF THE DIE AND A SUBSEQUENT BLANK UTILIZED TO PRESS THE PRECEDING BLANK THROUGH THE DIE. THE BLANK IS RADIALLY CONFINED BEFORE EXTRUSION LOADS ARE APPLIED THERETO AND THE END FACE OF THE BLANK IS FULLY SUPPORTED BY THE PUNCH OR A SUBSEQUENT BLANK.
Inventors
- 👤 Gerald R Eakin
- 👤 George T Payne
Bibliographic Details
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