Press machine and press method
AssigneeMurata Machinery, Ltd.
InventorsWataru IMAEDA, Masaaki HAYASHI, Akinobu WATANABE
Life of this patent
Estimating the term…
Abstract
A press machine includes a drive mechanism that moves at least one of an upper tool and a lower tool and machines a workpiece placed between the upper and lower tools. The drive mechanism includes a first drive source that rotates a screw shaft serving as an advance-retract component and a second drive source that rotates a nut connected to the screw shaft. A structure including the upper tool and lower tools includes a casing supporting the screw shaft such that the screw shaft is rotatable, a movable member that is movably formed in the casing and can contact an end of the screw shaft or retract therefrom, and a drive unit that moves the movable member.
Claims7
A press machine comprising a drive mechanism configured to move at least one of an upper tool and a lower tool, the press machine aiming to machine a workpiece placed between the upper tool and the lower tool, wherein
- the drive mechanism uses a screw shaft or a nut connected to the screw shaft as an advance-retract component and comprises:
- a first drive source configured to rotate the screw shaft;
- and
- a second drive source configured to rotate the nut,
- a structure comprising the upper tool or the lower tool comprises:
- a casing supporting the screw shaft or the nut in such a manner that the screw shaft or the nut is rotatable;
- a movable member movably formed in the casing and configured to be capable of contacting an end of the screw shaft or an end of the nut or retracting therefrom;
- and a drive unit configured to move the movable member.
A press method comprising a drive mechanism configured to move at least one of an upper tool and a lower tool, the press method aiming to machine a workpiece placed between the upper tool and the lower tool, wherein
- the drive mechanism uses a screw shaft or a nut connected to the screw shaft as an advance-retract component and comprises:
- a first drive source configured to rotate the screw shaft;
- and
- a second drive source configured to rotate the nut,
- a structure comprising the upper tool or the lower tool comprises:
- a casing supporting the screw shaft or the nut in such a manner that the screw shaft or the nut is rotatable;
- a movable member movably formed in the casing and configured to be capable of contacting an end of the screw shaft or an end of the nut or retracting therefrom;
- and a drive unit configured to move the movable member, the press method comprising:
- rotating, by the first drive source or the second drive source, the screw shaft or the nut with the movable member retracted from the end of the screw shaft or the end of the nut to move at least one of the upper tool or the lower tool;
- subsequently causing, by the drive unit, the movable member to contact the end of the screw shaft or the end of the nut;
- and
- subsequently rotating, by the second drive source or the first drive source, the nut or the screw shaft to machine the workpiece.
Dependencies are inferred from the claim text.