| 摘要 |
PURPOSE:To obtain the toothed-wheel of good accuracy without causing any rise by rolling a forming toothed-wheel by repeating positive and reverse rotations with pressing it with contact with the tooth face of a toothed-wheel blank by specific pressure. CONSTITUTION:When a center toothed-wheel 20 is displaced at its center by a transfer means 21, rotating force is given to both rotating tools 4, 5 and a toothed-wheel blank w receives the pressure in reverse direction from right and left. The idling between the forming-toothed wheels 10, 11 made thin is then eliminated, the forming toothed-wheels 10, 11 and blank W are closely fitted by the pressure, the pressure thereof is in proportion to the transfer pressure of the center toothed-wheel 20 and the blank W is subjected to plastic working with this pressure. In this state, driving force is given to the rotary tool 4 or 5 or the blank W and after rolling by giving rotation force to the rotary tool 4 it is rotated in reverse direction to form the tooth face of the blank W. The center tooth wheel 20 is then displaced in the center point direction, the unworking tooth face is subjected to rolling with said gist and this operation is repeated. |
