| 摘要 |
A form tool for a rotating workpiece comprising a removable resharpenable tool insert, a tool holder with a recess receiving the insert, and an adjustable tool insert support which will raise and relocate the insert in the tool holder recess after each resharpening. Preferably the tool insert support comprises one or more wedge-shaped members drawn into the recess with bolts, serving to clamp the resharpenable insert against the rear wall and top shelf of the recess. The resharpenable tool insert has a top planar surface adapted to be removed during resharpening, a rear surface and a profiled front form surface parallel to the rear surface. The front form surface intersects the top surface at a first included angle which is the complement of the sum of a preselected top rake angle "R" and a preselected front clearance angle "C". The tool holder recess has an overhanging shelf for locating the top planar surface of the insert and a rear wall for locating the rear surface of the insert, the rear wall and shelf forming a second included angle which is the supplement of the first included angle. A pair of sidewalls locate the form tool longitudinally in the recess and permit a range of form tools of different profiles with the same tool holder.
|
