| 摘要 |
PURPOSE:To perform multifarious cutting operations speedily with a simple structure, by changing the position of a tool to a workpiece by the specified reduction gear ratio dependent upon the number of teeth or the like of an intermittent gear, by rotation of a spindle. CONSTITUTION:When drilling for 16 holes is performed with the tool 40 attached to four tool chucks now, a piston 27 is engaged with a first positioning groove 35, setting it to the initial machining position, a spindle 1 is rotated, giving feed to the tool, and a tool driving shaft 42 is rotated via a driving gear 14 and a gear 43, then drilling for four holes takes place. Next, pressure oil is led into the inside of a support cylinder 50 and the engagement of the piston 27 is released, and afterward, with rotation of the spindle 1, a multispindle head 30 is rotated around a driving shaft 11 as far as 90 degrees at the specified reduction gear ratio made by a driving gear 124 and an internal gear 34 via an intermittent gear 117, and the piston 27 is engaged with a second positioning groove 35, performing drilling for four holes, then doing the same manner hereafter, drilling for a total of 16 holes takes place. Thus, working efficiency in multifarious cutting operation is improvable. |
