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US 5,279,197 AGranted
Punching press
AssigneeMechtro Joban International Co., Ltd.
InventorsShinya Takeda, Kazuo Saegusa
Life of this patent
Estimating the term…
Abstract
A punching press according to the present invention employs a servo motor as the driving source of the punching operation to achieve fine control, and exhibits a performance which is equivalent to or higher than that of a conventional punching press which employs a hydraulic cylinder. A hammer member which performs the punching operation is coupled to a stroke member which performs a stroke motion. The stroke member is coupled to a motion converting unit which converts the rotational motion of a servo motor into a stroke motion.
Claims5
A punching press comprising:
- a frame for holding a workpiece;
- hammer means slidably mounted in said frame for punching a hole in the workpiece, and having a first pin affixed thereto;
- a feed screw rotatably mounted in said frame;
- an electric servo motor for imparting rotational motion to said feed screw;
- a first nut rotatably carried by said feed screw and having a second pin affixed thereto;
- a second nut rotatably carried by said feed screw and having a third pin affixed thereto;
- and
- two links, a first having a first end affixed to said first pin and a second end affixed to said second pin, and the second link having a first end connected to said first pin and a second end affixed to said third pin,
- whereby operation of said electric servo motor rotates said feed screw, causing said first and second nuts to move relative to each other, thereby causing said manner to perform a punching operation on the workpiece.
6 more elements
Dependencies are inferred from the claim text.