JP2569042Y2 - Press die cushion device - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a transfer press die cushion device having a lifter inside a die cushion pad.

[0002]

2. Description of the Related Art Conventionally, a transfer press is equipped with a transfer feeder for transferring a work, and the transfer feeder carries in and out the work and transfers the work between processing stations. When processing coil material by transfer press, a blanking station may be provided in a part of the processing station, and blanking processing may be performed at this blanking station.Blanked work is transported by a transfer bar. In order to do this, it is necessary to lift the work after processing to the clamp position of the transfer bar. Therefore, conventionally, an individual device is installed on a die cushion pad provided in a blanking station to lift a work, or a lifter is incorporated in a mold to lift a work.

[0003]

However, in the method of providing an individual device on the die cushion pad as in the former method, when the die cushion is used as a main cushion, the individual device must be detached and attached each time. There was a problem that the work efficiency was poor due to the large number of man-hours required for setup. In the latter method of mounting a lifter in a mold, a mold having a complicated structure is required, so that the mold is expensive, and there is a problem that much labor is required for adjustment work. The present invention has been made with a view to improving the above-mentioned disadvantages, and aims to provide a die cushion device for a press in which a lifter is installed in a pad, thereby eliminating setup time and improving productivity associated therewith. It is the purpose.

[0004]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention provides a die cushion device for a press, which elastically supports a mold installed in a processing station of a press body from below through a cushion pin. The die cushion pad that the lower end of the cushion pin contacts is divided into a main pad and a sub pad, and the sub pad is vertically movably accommodated in the upper part of the main pad so that the upper surface of the main pad and the upper surface of the sub pad are substantially flush with each other. The sub-pad can be moved up and down by a lifter installed in the main pad.

[0005]

[Operation] The work completed by the above configuration is
The subpad allows the transfer bar to be lifted to a height where it can be clamped.

[0006]

[Embodiment] An embodiment of the present invention will be described in detail with reference to the drawings. FIG. 1 is a plan view of a transfer press, in which 1 is a press body, and 2 is a transfer feeder.
The transfer feeder 2 has a pair of transfer bars 3 arranged side by side in the work transfer direction (arrow A) between the uprights 1a of the press body 1 and clamps the work 6 between the transfer bars 3 to thereby transfer each work. Are transported to the processing stations D ₁ , D ₂ .

The above-mentioned processing stations D ₁ , D ₂ ...
As shown in FIG. 2, each processing station D ₁ , D
Each of the die cushions 4 is installed for every ₂ ..., And the fifth processing station is a blanking station D _5, and the coil material 5 is worked by an uncoiler (not shown) installed in front of the press body 1. being adapted to be supplied from the direction (arrow B) perpendicular to the conveying direction a, the die cushion device 7 of this invention is installed in the blanking station D _5.

As shown in FIG. 3, the die cushion device 7 includes an air cylinder 7b in a bed 1b of the press body 1.
A die cushion cushion body 7a including a hydraulic cylinder 7c and a die cushion pad 8 are provided above the air cylinder 7b. As shown in FIG. 3, the die cushion pad 8 is attached to the moving bolster 9 side which can be moved in and out of the press body 1, so that the upper part of the air cylinder 7a comes into contact with the lower part during operation. .

On the other hand, the die cushion pad 8 comprises a cylindrical main pad 8a as shown in FIGS. 4 and 5, and a cross-shaped sub pad 8b provided thereon. The main pad 8a has a disk-shaped upper plate 8d having a cross-shaped groove 8c at the top, and a sub pad 8b is accommodated in the groove 8c so as to be vertically movable. A lifter 10 composed of an air cylinder is installed in the main pad 8a, and the sub pad 8b is moved up and down with respect to the main pad 8a by the lifter 10.

[0010] Next In operation, hitting the coil member 5 to blanking as blanking station D ₅ the fifth processing station of the press body 1, first blanking station as shown in FIGS. 6 and 7 D
₅ , a blanking mold 12 is installed, and the lower mold of the blanking mold 12 is connected to the main pad 8a and the sub pad 8b via cushion pins 13 arranged as shown in FIG.
To be supported from below. In this state, the slide 1c of the press body 1 is lowered, and the coil material 5 is moved between the upper die of the blanking die 12 attached to the slide 1c and the lower die.
During the drawing, the die cushion body 7 is lowered by the cushioning action of the die cushion body 7 as shown in FIG. When the slide 1c reaches the bottom dead center and the molding is completed and the slide 1c starts to rise,
Molded product 5a by the cushion action of die cushion body 7a
Is raised to a position before the start of molding as shown in FIG.

Thereafter, the sub pad 8b is lifted by the lifter 10 accommodated in the main cushion 8a.
As shown in FIG. 9C, the molded product 5a is raised to a position where the finger 3a attached to the transfer bar 3 can be clamped through the cushion pin 13a supported by the subpad 8b. This makes it possible to convey the molded article 5a completing processing at blanking station D ₅ by the transfer bars 3 to the next processing station. Note that, in the above embodiment, although the fifth processing station and blanking station D _5, of course the other processing stations may be blanking station.

[0012]

[Effect of the invention] As described in detail above, the invention divides the die cushion pad into a main pad and a sub pad,
In addition, since the sub pad can be moved up and down by a lifter provided in the main pad, after molding using the die cushion body, the sub pad is raised by the lifter to raise the molded product to a position where the transfer bar can be clamped be able to. This eliminates the need for providing a separate device in the die cushion pad and lifting the molded product as in the related art, thereby eliminating the setup time for attaching and detaching the individual device, and providing a lifter in the mold. There is no need to use complicated and expensive molds, so it is economical. Further, since the upper surfaces of the main pad and the sub pad are made to be the same plane, the main pad can be used for ordinary molding as a main cushion, so that the versatility is high.

[Brief description of the drawings]

FIG. 1 is a plan view of a transfer press according to an embodiment of the present invention.

FIG. 2 is a front view of a transfer press according to an embodiment of the present invention.

FIG. 3 is an enlarged front view of a die cushion device according to an embodiment of the present invention.

FIG. 4 is a plan view of a die cushion pad according to an embodiment of the present invention.

FIG. 5 is a sectional view taken along line XX of FIG. 4;

FIG. 6 is a plan view showing a blanking station.

FIG. 7 is a sectional view of a blanking station.

FIG. 8 is an explanatory diagram showing an arrangement of cushion pins on a die cushion pad.

FIGS. 9 (a) to 9 (c) are explanatory views of the operation during blanking molding.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Press body, 8 ... Die cushion pad, 8a ... Main pad, 8b ... Sub pad, 10 ... Lifter, 13 ...
Cushion pin.

Claims (2)

(57) [Scope of request for utility model registration] 1. A die cushion device for a press, which elastically supports a die set in a processing station of a press body 1 from below through a cushion pin 13, wherein a die cushion pad 8 to which the lower end of the cushion pin 13 contacts is used. Divided into main pad 8a and sub pad 8b,
The sub pad 8b is connected to the main pad 8 so that the upper surface of the main pad 8a and the upper surface of the
A die cushion device for a press, which is housed in the upper part of the main pad 8a so as to be able to move up and down and the sub pad 8b can be moved up and down by a lifter 10 installed in the main pad 8a. 2. The die cushion device according to claim 1, wherein a cross-shaped concave groove 8c is formed on the upper surface of the main pad 8a, and the cross-shaped sub pad 8b is accommodated in the concave groove 8c so as to be vertically movable. .