| 摘要 |
<p>This invention relates to a hob cutter for cutting gears and more particularly to a hob cutter or rack cutter capable of simultaneously cutting and chamferring an involute gear. The hob cutter in accordance with the present invention is a hob or rack cutter for cutting and chamferring gears wherein a pressure angle alpha 1 and module M of a rack tooth shape of a rack for cutting a first involute gear are respectively different from a nominal pressure angle alpha o and module m but offer a so-called transfer rack tooth shape in order to provide limit values to a number of teeth vs. chamfer quantity characteristic curve and to minimize a change in a chamfer quantity. According to the present invention, it is possible to ordinarily chamfer almost all gears from gears having a small number of teeth to gears having a large number of teeth with one kind of hob cutter.</p> |
