US-20260124666-A1 - PRESS SYSTEM AND TRANSFER DEVICE

US20260124666A1US 20260124666 A1US20260124666 A1US 20260124666A1US-20260124666-A1

Abstract

To provide a press system enabling to take out a workpiece from below a die and achieve miniaturization and simplification of a device. The press system includes: a plurality of press working units each including a die 71 and a punch; and a transfer device 76 that transfers a workpiece processed in one press working unit to the next press working unit. The transfer device 76 includes: a plurality of transfer fingers 77 that clamp the workpiece from both sides in a direction perpendicular to a transfer direction of the workpiece; slide bars ( 78 A, 78 B) on which the plurality of transfer fingers 77 are disposed; a drive unit that drives the slide bars ( 78 A, 78 B) to reciprocate; stays 80 extending from the slide bars ( 78 A, 78 B) toward an underside of a specific die 71 A; and an under-die removal finger 81 disposed on the stays 80 , the under-die removal finger 81 clamping the workpiece moved to below the specific die 71 A.

Inventors

Hiroya Kimura
Eiji Hashimoto

Assignees

FUJI SPRINGS CO., INC.

Dates

Publication Date: 20260507
Application Date: 20240624
Priority Date: 20240129

Claims (8)

1 . A press system comprising a plurality of press working units each comprising a die and a punch to perform a plurality of press drawing processes on a workpiece, the press system further comprising: a transfer device that transfers the workpiece processed in one of the plurality of press working units to a next press working unit, wherein the transfer device comprises: a plurality of transfer fingers provided to clamp the workpiece from both sides in a direction perpendicular to a transfer direction of the workpiece; a pair of slide bars extending along the transfer direction, on which the plurality of transfer fingers are disposed; a drive unit that drives the slide bars to reciprocate along the transfer direction; stays extending from the slide bars toward an underside of a specific die, the specific die being the die of any press working unit of the plurality of press working units; and an under-die removal finger disposed on the stays, the under-die removal finger clamping the workpiece that has passed through a molding hole of the specific die and moved to below the specific die.
2 . The press system as claimed in claim 1 , wherein the press working unit comprising the specific die comprises a specific die holder configured to support the specific die, and the specific die holder is provided with an opening to insert the stays.
3 . The press system as claimed in claim 2 , wherein the specific die holder is formed in a frame-like shape to support the specific die.
4 . The press system as claimed in any one of claims 1 to 3 , wherein each of the stays comprises a member that is secured to one of the slide bars and extends from the slide bars toward an underside of the specific die.
5 . The press system as claimed in any one of claims 1 to 3 , further comprising a lower die set on which the plurality of press working units each comprising the die and a die holder configured to support the die are mounted, wherein the die holder of each of the plurality of press working units is mounted on the lower die set, the lower die set comprises a step formed such that a height position of a mounting position of the specific die holder is lower than a height position of a mounting position of the die holder of the press working unit preceding the press working unit comprising the specific die holder, and the specific die holder has a height dimension set to align a height position of an upper end surface of the specific die holder with a height position of an upper end surface of the die holder of the press working unit preceding the press working unit comprising the specific die holder.
6 . The press system as claimed in any one of claims 1 to 3 , further comprising a lower die set on which the plurality of press working units each comprising the die and a die holder configured to support the die are mounted, wherein the die holder of each of the plurality of press working units is mounted on the lower die set, the specific die holder is disposed to align a height position of an upper end surface of the specific die holder with an upper end surface of the die holder of the press working unit preceding the press working unit comprising the specific die holder, and the die holder of the press working unit preceding the press working unit comprising the specific die holder has a height dimension set to be aligned with a height dimension of the specific die holder.
7 . A transfer device to be used for a press system comprising a plurality of press working units each comprising a die and a punch to perform a plurality of press drawing processes on a workpiece, the transfer device transferring the workpiece processed in one of the plurality of press working unit to a next press working unit, the transfer device comprising: a plurality of transfer fingers provided to clamp the workpiece from both sides in a direction perpendicular to a transfer direction of the workpiece; a pair of slide bars extending along the transfer direction, on which the plurality of transfer fingers are disposed; a drive unit that drives the slide bars to reciprocate along the transfer direction; stays extending from the slide bars toward an underside of a specific die, the specific die being the die of any press working unit of the plurality of press working units; and an under-die removal finger disposed on the stays, the under-die removal finger clamping the workpiece that has passed through a molding hole of the specific die and moved to below the specific die.
8 . The transfer device as claimed in claim 7 , wherein each of the stays comprises a member that is secured to one of the slide bars and extends from the slide bars toward an underside of the specific die.

Description

FIELD OF THE DISCLOSURE The present invention relates to a press system and a transfer device used for a press system. BACKGROUND OF THE DISCLOSURE There has been known a press system that includes a plurality of press working units each including a die and a punch and performs a plurality of press drawing processes on a workpiece. For example, there is disclosed in Patent Document 1 a press system including a transfer device that transfers a workpiece processed in one of the plurality of press working units to a next press working unit. In the press system of Patent Document 1, a workpiece take-out device 40 is provided to take out the workpiece, which has passed through a die of a final press working unit of the plurality of press working units. The workpiece take-out device 40 is configured to include a fixed base 41, a pair of first movable bases 43, a pair of second movable bases 44, a pair of arm units 50, a ball screw mechanism 60, a forward/backward drive unit 63, a pair of open/close drive units 52, etc. Note that the fixed base 41 is secured to a frame 11 and projects from an exterior surface of the frame 11, the frame 11 supporting a ram 14 and a bolster 16. The pair of first movable bases 43 is supported by the fixed base 41 so as to be movable in a first horizontal direction, and arranged side by side in a second horizontal direction. The pair of second movable bases 44 is supported by the pair of first movable bases 43 so as to be movable in the second horizontal direction. The pair of arm units 50 extends from the pair of second movable bases 44 to the bolster 16 side in the first horizontal direction. The ball screw mechanism 60 is supported by the fixed base 41 on the upper side than the first movable bases 43 and the second movable bases 44. The forward/backward drive unit 63 drives the ball screw mechanism 60 to move the pair of arm units 50 to a forward position inside the frame 11 and a backward position away from the frame 11 in the first horizontal direction. The pair of open/close drive units 52 is coupled to the pair of second bases 44, and moves the pair of arm units 50 to a closed position to clamp the workpiece and an open position separated from the workpiece. PRIOR ART DOCUMENTS Patent Documents Patent Document 1: Japanese Patent No. 6626234 SUMMARY OF THE DISCLOSURE Problems to be Solved Incidentally, if it is possible to take out a workpiece subjected to press drawing from below a die, it is possible to remove the workpiece without passing the workpiece again through the bottom to the top of the die. This can prevent defects from occurring on the workpiece due to passing the workpiece again through the bottom to the top of the die. Therefore, it has been demanded to realize a device configuration capable of removing a workpiece from below a die. Further preferably, along with the removal of a workpiece from below a die as described above, it has been demanded to achieve miniaturization and simplification of the device. The present invention has been made in view of the above-described circumstances, and an object thereof is to provide a press system and a transfer device enabling to take out a workpiece from below a die and also achieve miniaturization and simplification of the device. Means for Solving Problems A first aspect of the present invention is a press system including a plurality of press working units each including a die and a punch to perform a plurality of press drawing processes on a workpiece, the press system further including: a transfer device that transfers the workpiece processed in one of the plurality of press working units to a next press working unit,wherein the transfer device includes:a plurality of transfer fingers provided to clamp the workpiece from both sides in a direction perpendicular to a transfer direction of the workpiece;a pair of slide bars extending along the transfer direction, on which the plurality of transfer fingers are disposed;a drive unit that drives the slide bars to reciprocate along the transfer direction;stays extending from the slide bars toward an underside of a specific die, the specific die being the die of any press working unit of the plurality of press working units; andan under-die removal finger disposed on the stays, the under-die removal finger clamping the workpiece that has passed through a molding hole of the specific die and moved to below the specific die. According to the above-described first aspect of the press system, the plurality of transfer fingers for clamping the workpiece are disposed on the slide bars, which are driven to reciprocate, and the stays on the slide bars extend toward the underside of the specific die. Further, the under-die removal finger for clamping the workpiece moved to below the specific die is disposed on the stays. This makes it possible to take out the workpiece from below the specific die by clamping the workpiece passed through the specific die with the under-die removal fin