| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a hybrid-type press device in which an elevating means and a pressurizing means for a ram are separated, in which the device is reduced in size and weight by eliminating a crown while using a ball screw mechanism as an elevating means, and the ball screw mechanism is provided with a countermeasure for suppressing or preventing wear due to a load applied to the elevating means by the slight downward movement of the ram when a pressing pressure is applied on the ram by the pressing means. <P>SOLUTION: The elevating means is a ball screw mechanism in which a male screw shaft 4 which rotates on its axis normally and reversely is brought downward from a ram 1, and the male screw shaft 4 is screwed to a female screw 5 which is positionally fixed to a bed 2. <P>COPYRIGHT: (C)2012,JPO&INPIT |
