JPH0753781Y2 - Mold changing device for press machine - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Field of Industrial Application) The present invention relates to improvement of a die changing device of a press machine.

(Prior Art) Various mold exchanging devices for automatically exchanging a mold used for press working in a press machine such as a turret punch press are already known, and generally, this is a tool located at a position away from the press machine. It has a die stock magazine that holds replacement press dies as a tower and the like. The press die is conveyed by a press die conveying means such as the above, and the press die is exchanged.

(Problems to be solved by the invention) In a mold exchanging device using a robot, a rotary motion and a linear motion are often required for conveying the mold in one mold exchange. Therefore, there is a problem that the hang length becomes long, the time required for die replacement becomes long, the takt time becomes long, and the positioning accuracy becomes unstable.

In the case of using a manipulator, since the press machine transportation means itself moves, the positioning accuracy becomes unstable, and the load that acts on the rail that guides the manipulator between the die stock magazine and the press die. In addition, the manipulator needs to reciprocate between the die stock magazine and the press machine when exchanging a plurality of dies, which also increases the takt time.

In view of the above-mentioned problems, the present invention provides a die exchanging device for a press machine which exchangs dies in a short time by a combination of only simple linear movements and has a simple structure and high operation reliability. Is intended.

[Means for Solving the Problems] (Means for Solving the Problems) In order to achieve the above-mentioned object, the present invention provides a plurality of molds at predetermined intervals above a mold replacement position of a turret provided in a press machine. A stockyard provided to hold a holder and selectively move one of the mold holders in a horizontal direction at a position corresponding to the mold replacement position of the turret, and the stock just above the mold replacement position. A press machine equipped with a mold moving device for moving and changing the mold holder between the yard and the turret, enabling the mold moving device to be stopped at an intermediate position, and the mold holder locking groove in the stockyard. And a plurality of engaging holes in which a die holder holding member provided in the die moving device and a penetrating groove through which the die holder holding member can penetrate are provided at predetermined intervals to form a die exchanging device of a press machine.

(Operation) By adopting the die exchanging device of the press machine of the present invention, the die exchanging is performed only by the horizontal movement of the stockyard and the vertical movement of the die moving device.

That is, in order to mount the mold holder engaged with the mold holder locking groove of the stock yard on the turret, the mold holder holding part of the mold moving device provided immediately above the mold replacement position of the turret should be stocked. The mold holder attached to the yard is positioned so that it can be engaged, and the stock yard is horizontally moved to hold the mold holder. After that, the stock yard is moved a little and the mold holder is positioned in the through groove, and the mold moving device is lowered to mount the mold holder on the turret.

To store the mold holder attached to the turret in the stock yard, position the through groove provided in the stock yard directly above the mold holder and use the mold holder holding part of the mold moving device to move the mold holder. Pull out from the turret and move the mold holder into the through groove in the stockyard. After that, the stock yard is moved a little and the mold holder is held in the mold holder locking groove for storage.

Therefore, the die replacement is performed with a short hang length.

(Embodiment) Hereinafter, an embodiment of the present invention will be described in detail with reference to the drawings.

A turret punch press will be described as an example of the press machine with reference to FIGS. 5 and 6. The turret punch press has a main body frame 1 having a bridge structure. The main body frame 1 rotatably supports an upper turret disk 5 on an upper frame 3 and a lower turret disk 9 on a lower frame 7. I support you.

The upper turret disc 5 and the lower turret disc 9 are arranged concentrically with each other, and a punch die is attached to the upper turret disc 5 and a die die is attached to the lower turret disc 9 in a replaceable manner.

A striker 11 is provided on the upper frame 3, and the striker 11 is in the punch press position P (see FIG. 6).
The punching die on the upper turret disk 5 is pressed.

A work table 13 and a carriage base 15 which are movable in the left-right direction in the figure, that is, the Y-axis direction, are attached to the lower frame 7, and a carriage 17 is mounted on the carriage base 15 in the vertical direction when viewed in FIG. That is, it is provided so as to be movable in the X-axis direction. Work clamp on carriage 17
19 is provided, and the work clamp 19 is configured to grip the plate material to be processed.

The workpiece plate gripped by the work clamp 19 moves in the Y-axis direction by the movement of the work table 13 in the Y-axis direction, and also moves in the X-axis direction by the movement of the carriage 17 in the X-axis direction. Direction and X-axis direction machining coordinate system control is performed.

A guide rail 21 is attached to one side of the upper frame 3 horizontally in the Y-axis direction. A stockyard 23 is engaged with the guide rail 21, and the stockyard 23 is a guide rail.
Guided by 21, it can move horizontally in the Y-axis direction. In the stockyard 23, in the direction of movement of this, namely Y
A plurality of mold holders 25 that are axially spaced from each other
Is provided so that any one of the mold holders 25 is selectively positioned at a position directly above the upper turret disk 5 corresponding to the mold changing position C by the movement of the stockyard 23 in the Y-axis direction. Has become.

A rack 27 is provided in the stockyard 23 along the direction in which it extends.
Is installed. A pinion 31 of an electric motor 29 for moving a stockyard is meshed with the rack 27. Pinion 31
Is rotationally driven around its own central axis by an electric motor 29, so that the stock yard 23 is horizontally reciprocated in the Y-axis direction from the mesh with the rack 27, and any one of the plurality of mold holders 25 is moved. One of them is selectively placed in the mold changing position C.

A mold moving device 33 is attached to the upper frame 3 at a position corresponding to the mold changing position C of the upper turret disk 5.

The stockyard 23 will be described in more detail. Referring to FIGS. 3 and 4, a rack 27 extending along the stockyard 23 is meshed with a pinion 31 of an electric motor 29 for moving the stockyard, and the stockyard 23 is shown in FIGS.
In the figure, it can be moved to the left and right. The stock yard 23 is provided with a die holder engaging groove 37 which is an engaging hole 35 with which the die holder 25 is engaged. A through groove 39 having a width X is formed so that a die holder holding member, which is an apparatus, can penetrate therethrough.

With the above configuration, when the mold holder 25 engaged with the mold holder engagement groove 37 is held by the mold moving device described later and the stockyard 23 is moved by a slight amount (S dimension in FIG. 3), The mold holder 25 is located in the through groove 39 so that the mold holder 25
Will be exchanged.

Next, the mold moving device 33 will be described in more detail.

Referring to FIG. 1 and FIG. 2, a bracket 41 is fixed on the side of the frame 3 and directly above the mold exchange position C, and a fluid pressure-operated lifting cylinder 43 is attached to the bracket 41. There is. This lifting cylinder 43
Is a two-stage mechanism. That is, it is possible to stop at the rising end, the intermediate point holding the mold holder 25, and the falling end, respectively.

A support plate 47 is integrally provided on the lower end of the piston rod 45 of the lifting cylinder 43, and a holding member 49 that holds the mold holder 25 is attached to the lower surface of the support plate 47. The retaining member 49 has a locking portion 51 projecting inward from the lower end, and the collar portion 53 of the mold holder 25 is hung from the locking portion 51.
Further, the holding member 49 is formed with an opening 55 that opens in four directions.

With the above configuration, the stockyard driving electric motor 29 is driven, and the desired mold holder 25 mounted on the stockyard 23 is positioned directly below the lifting cylinder 43 of the mold moving device 33 via the pinion 31 and the rack 27. To do. At this time, the lifting cylinder 43 is located at the middle point, and the flange portion 53 of the mold holder 25 passes through the opening 55 of the holding member 49 provided in the lifting cylinder 43 at the locking portion 51 of the holding member 49. Hold.

After that, the stock yard 23 is moved again by a small amount (S dimension), and the mold holder 25 is positioned in the through groove 39 provided in the stock yard 23. When the elevating cylinder 43 is lowered to the lower end in this state, the mold holder 25 is mounted on the upper turret disc 5, and the upper turret disc 5 is slightly rotated to move the mold holder 25 to the elevating cylinder 43.
Of the holding member 49.

When the mold holder 25 is removed from the upper turret disc 5 and stored in the stockyard 23, the above operation can be performed in reverse.

That is, the through-hole 39 of the empty engagement hole 35 where the mold holder 25 is not attached to the stock yard 21 is set in the lifting cylinder 43.
And the cylinder 43 for raising and lowering is lowered to the lower limit. On the other hand, the mold holder 25, which is mounted on the upper turret disk 5 and is to be replaced, is rotated and mounted in the holding member 49 of the lifting cylinder 43.

After that, the lifting cylinder 43 is raised to the middle point, and the stockyard 23 is moved by a small amount, so that the mold holder 25
Is mounted in the mold holder engagement groove 37, and the stock yard 23 is moved to move the mold holder 25 to the holding member for the lifting cylinder 43.
Remove from 49 to complete the storage work.

As described above, the die holder 25 can be replaced only by the linear movement and the vertical movement of the die moving device 33, and the die replacement can be reliably performed in a short time with a short hang length, so that the takt time can be shortened. You can Further, since it is not necessary to provide a chuck device for holding the mold holder 25, the cost is reduced, the replacement of the mold holder 25 is simplified, and the positioning with high reliability and stability becomes possible.

The present invention is not limited to the above-described embodiments, but can be implemented in other modes by making appropriate changes.

[Effect of the Invention] As will be understood from the above description of the embodiments, according to the present invention, the mold holder is moved in a short time only by the horizontal movement of the stockyard and the vertical movement of the mold moving device. Can be replaced and the tact time can be shortened. Further, since the structure is simple, cost reduction and highly reliable positioning with high stability can be performed.

[Brief description of drawings]

1 to 4 show a main part of the present invention, FIG. 1 is an enlarged view of a portion indicated by an arrow I in FIG. 5, FIG. 2 is a right side view in FIG. 1, and FIG. Fig. 4 is a partially enlarged view of a portion indicated by an arrow III in Fig. 4, Fig. 4 is a side view of Fig. 3, Fig. 5 and Fig. 6 show a turret punch press of an embodiment for carrying out the present invention, and Fig. 5 is a schematic view. A side view and FIG. 6 are schematic plan views in FIG. 5 …… Upper turret disc 9 …… Lower turret disc 23 …… Stockyard, 25 …… Mold holder 33 …… Mold moving device, 35 …… Engagement hole 37 …… Mold holder engagement groove, 39… … Through groove 43 …… Elevating cylinder, 49 …… Holding member

Claims (1)

[Scope of utility model registration request] 1. A mold exchanging position of a turret provided on a press machine, and a plurality of mold holders are held at predetermined intervals above a mold exchanging position of the turret, and one of the mold holders is selectively exchanged. A stock yard horizontally movable at a position corresponding to the position, and a mold moving device for moving the mold holder between the stock yard and the turret to perform the replacement immediately above the mold replacement position. A press machine
The mold moving device can be stopped at an intermediate position, and a mold holder locking groove and a through groove through which a mold holder holding member provided in the mold moving device can penetrate are continuously provided in the stockyard. A mold exchanging device for a press machine, wherein a plurality of dowel holes are provided at predetermined intervals.