| 摘要 |
PROBLEM TO BE SOLVED: To enable bulk production of screw bodies with a high accuracy.SOLUTION: A screw rolling device 100 for rolling a thread part on a screw stock B comprises: a first die member 132 which a first rolling irregularity is formed; a second die member 142 in which a second rolling irregularity is formed, and which is moved in a rolling direction relatively to the first die member 132; a cycle mechanism 160 which, in the state that the screw stock B is sandwiched between the first die member 132 and the second die member 142, so relatively moves both die members as to roll the thread part on the screw stock B; and a position adjustment mechanism 180 which adjusts relative positions of the first die member 132 and the second die member 142 in the rolling direction.SELECTED DRAWING: Figure 2 |
