JPH11169960A - Die device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a die device provided with a vertically movable panel holding device capable of holding a panel at a state separated from lower faces of a punch.panel holder in an upper die. SOLUTION: In this die device, which consists of upper and lower dies for pressing a platy panel P and arranged with a panel holding device 19 to hold the peripheral part of the panel P after pressing to a panel holder 7, the panel holding device 19 is provided vertically movably to/from the panel holder 7, the panel holding device 19 is provided with a fixed clamp jaw 29, which is integrally provided in an elevation plate 25 supported vertically movably to/from the panel holder 7, a moving clamp jaw 33, which holds the peripheral part of the panel P in cooperation with the fixed clamp jaw 29, and an actuator 43, which is supported by the elevation plate 25 and actuates the moving clamp jaw 33.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mold apparatus for performing press working of, for example, a body panel of an automobile, and more particularly, to a method for ascending an upper mold in a mold apparatus.
The present invention relates to a mold device provided with a panel holding device for lifting a panel after press working following the rise of an upper mold.

[0002]

2. Description of the Related Art As a prior example relating to the present invention, Japanese Patent Laid-Open No.
No. 39966 is known. In the above example, FIG.
As shown in the figure, an upper die 3 for pressing a panel P in cooperation with a lower die 1 mounted on a bolster of a press machine.
Is mounted on the lower surface of a vertically movable slider in a press machine. The upper mold 3 includes a punch 5 that cooperates with the lower mold 1 to form a panel P;
Prior to the forming process, the peripheral portion of the panel P is
And a panel holder 7 pressed against the upper surface of the panel.

At a plurality of positions of the panel holder 7, a panel holding device 9 for holding a peripheral portion of the panel P formed by the upper and lower dies 1, 3 is mounted. The panel holding device 9 is configured to press the peripheral edge of the formed panel P against the lower surface of the panel holder 7 by a pressing arm 13 that is turned up and down by a fluid pressure cylinder 11.

[0004]

In the configuration of the above-mentioned prior art, after the panel P is supplied and mounted on the lower mold 1,
The upper die 3 is lowered to perform the forming process, the fluid pressure cylinder 11 of the panel holding device 9 is operated, and the pressing arm 13 presses the peripheral portion of the panel P against the lower surface of the panel holder 7. When the panel P is raised, the panel P after the forming process is integrally lifted in a state where the panel P comes into contact with the lower surface of the punch 5 in the upper mold 3.
Of the panel P is turned upside down and supplied to the press machine in the next step.

However, as shown in FIG. 6, a floating punch 17 which is moved up and down by a fluid pressure source 15 is provided inside the punch 5, and as shown in FIG. In the case of the configuration in which the forming is performed by the floating punch 17, in other words, the punch 5
When the upper die 3 is lifted, the panel P after molding is pressed downward by the floating punch 17 so that the panel P is sometimes deformed or dropped. There is a problem that there is.

Reference numeral 9H in FIG. 5 indicates a portion where the panel P is held by the panel holding device 9.

[0007]

SUMMARY OF THE INVENTION The present invention has been made in view of the problems of the prior art as described above, and the invention according to claim 1 is directed to an upper and lower metal plate for pressing a plate-shaped panel. To the panel holder that is made up of
In a die apparatus provided with a panel holding device capable of holding a peripheral portion of a panel after press working, the panel holding device is provided so as to be vertically movable with respect to the panel holder.

According to a second aspect of the present invention, in the first aspect of the present invention, the panel holding device is a fixed clamp jaw integrally provided on an elevating plate supported up and down with respect to the panel holder. And a movable clamp jaw capable of clamping a peripheral portion of the panel in cooperation with the fixed clamp jaw, and an actuator supported by the elevating plate to operate the movable clamp jaw.

According to a third aspect of the present invention, in the first or second aspect of the present invention, a pressing means is provided for pressing the panel holding device downward with respect to the panel holder when the upper mold is raised. Things.

The invention according to claim 4 is based on claim 1,
In the invention described in 2 or 3, the lower die is provided with a stopper member capable of restricting downward movement of the panel holding device.

[0011]

According to the first aspect of the present invention, the upper and lower dies for pressing a plate-shaped panel, and a panel holder provided in the upper die are provided with a peripheral portion of the pressed panel. In a mold device provided with a panel holding device capable of holding the panel holder, the panel holding device is provided so as to be vertically movable with respect to the panel holder. The held panel holding device can move up and down with respect to the panel holder.

Therefore, the upper die is provided with the floating punch, and even if the floating punch tends to push down the panel when ascending after the forming process, the panel holding device is lowered to thereby lower the upper die. The panel can be held downward from the lower surface (forming surface), and the floating punch and the panel after forming can be held in a separated state, and the panel is deformed or falls from the panel holding device. Can be prevented.

According to a second aspect of the present invention, in the first aspect of the present invention, the panel holding device is a fixed clamp jaw integrally provided on an elevating plate supported up and down with respect to the panel holder. And a movable clamp jaw capable of clamping a peripheral portion of the panel in cooperation with the fixed clamp jaw, and an actuator supported by the elevating plate to operate the movable clamp jaw. In addition, it is easy to grip the peripheral portion of the panel with the fixed clamp jaw and the movable clamp jaw, and the panel holding device can be moved up and down with respect to the panel holder in a state where the panel is gripped. Therefore, the same effect as the first aspect can be obtained.

According to a third aspect of the present invention, in the first or second aspect, a pressing means is provided for pressing the panel holding device downwardly against the panel holder when the upper mold is raised. Therefore, when the upper mold rises after the panel is formed, the panel holding device is relatively lowered at the same time as the start of the rise of the upper mold. It becomes an aspect that separates from the lower surface of
The panel can be prevented from being pressed downward and deformed by the floating punch provided in the upper mold.

The invention according to claim 4 is based on claim 1,
In the invention described in 2 or 3, since the lower die is provided with the stopper member capable of restricting the downward movement of the panel holding device, the peripheral portion of the formed panel is formed by the panel holding device. When holding the panel, the panel holding device can be previously positioned at an appropriate position with respect to the panel, and the panel can be held accurately.

[0016]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.

The mold apparatus according to the embodiment of the present invention has a lower mold 1 (see FIGS. 1 and 2) mounted on a bolster of a press machine (not shown), similarly to the above-described mold apparatus of the prior art. Of the press machine and an upper mold (the overall configuration is not shown) mounted on the lower surface of the slider that can move up and down in the press machine. As in the prior example, the upper die includes a punch (not shown in FIGS. 1 and 2) and a panel holder 7 provided surrounding the punch (only a part is shown in FIGS. 1 and 2). The configuration is omitted). A panel holding device 19 is mounted on a plurality of locations of the panel holder 7. Note that the upper and lower dies in the die apparatus may be general dies, and thus the description of the details of the upper and lower dies is omitted.

More specifically, the overlapping portion of the panel holder 7 is separated and guided in a direction along a part of the periphery of the panel P formed by the upper and lower dies (the left and right direction in FIG. 2). A sleeve 21 is provided,
The guide sleeve 21 has a flange 23F at the upper end.
The guide pin 23 provided with is supported so as to be vertically movable. A rectangular elevating plate 25 is integrally fixed to the lower end of the guide pin 23 penetrating the guide sleeve 21 up and down.
Between the guide sleeve 5 and the guide sleeve 21, an elastic member 27 such as a coil spring is elastically mounted as a pressing means for pressing the lifting plate 25 downward.

A fixed clamp jaw 2 for holding the peripheral edge of the panel P formed by the upper and lower dies is provided substantially at the center of the lower surface of the elevating plate 25 in the longitudinal direction.
9 (see FIG. 1). The lower mold 29 has a lower surface 29F of the fixed clamp jaw 29 so that the peripheral portion of the panel P formed by the upper and lower molds can be sandwiched between the lower mold 29 and the support surface 1F of the lower mold 1. The above support surface 1F
It is formed in parallel with.

The lower surface 29F of the fixed clamp jaw 29
And a bracket 31 suspended from the base side of the fixed clamp jaw 29 so as to clamp the peripheral portion of the panel P between
A movable clamp jaw 33 in the form of a bell crank is supported rotatably up and down via a hinge pin 35. One end (tip) of the movable clamp jaw 33 passes through the clearance groove 1G formed in the lower mold 1 and approaches the lower surface 29F of the fixed clamp jaw 29 to fix the peripheral edge of the panel P to the fixed clamp jaw. Lower surface 29F of jaw 29
The movable clamp jaw 33
A clamp member 37, such as an adjusting screw, is screwed and fixed to the tip end so that the protrusion amount can be adjusted.

An appropriate actuator is mounted on the elevating plate 25 to rotate the movable clamp jaw 33 up and down. More specifically, a pair of support brackets 39 that penetrate through the vertical holes 7H of the panel holder 7 are integrally erected near the upper surface of the elevating plate 25 substantially at the center thereof. A fluid pressure cylinder 43 as an example of an actuator is swingably supported via a pivot 41.

The distal end of a piston rod 43P provided on the fluid pressure cylinder 43 so as to be vertically movable protrudes downward from the elevating plate 25, and is connected to a connecting bracket 45 attached to a lower end of the piston rod 43P and the movable bracket 45. The other end of the clamp jaw 33 is pivotally connected via a hinge pin 47.

As shown in FIG. 2, opposite to the guide pin 23, a stopper member 49 is provided on the lower mold 1 so as to contact the lower end of the guide pin 23 and restrict the downward movement. There is standing.

In the above configuration, when the slider of the press machine is in the raised state, the lower mold 1 mounted on the bolster of the press machine and the upper mold 3 mounted on the slider are largely separated vertically. It is in.
When the upper and lower molds are vertically separated from each other, after setting the panel P on the lower mold 1, the slider in the press machine is lowered to engage the upper and lower molds.
The molding process is performed on the panel P between the upper and lower molds.

As described above, the panel P is formed by the upper and lower molds.
When the upper mold is lowered to carry out the forming process while holding the panel holder 19, the panel holding device 19 is in a state of being lowered by its own weight with respect to the panel holder 7, as shown in FIG. When the lowering of the upper mold further proceeds, the lower end of the guide pin 23 of the panel holding device 19 comes into contact with a stopper member 49 erected on the lower mold 1 so that the lowering is restricted and the vertical positioning is performed. Is performed, and the panel holding device 1
The fixed clamp jaw 29 at 9 abuts on the peripheral edge of the panel P as shown in FIG.

Thereafter, as the slider in the press machine further descends, the peripheral portion of the panel P is pressed and fixed to the lower mold 1 by the panel holder 7, as shown in FIG. The panel P is formed by the upper and lower molds while being prevented. At this time, the elastic member 27 elastically mounted between the elevating plate 25 and the guide sleeve 21 is in a compressed state.

After the panel P is formed, when the piston rod 43P of the fluid pressure cylinder 43 as an example of the actuator is operated to protrude downward, the movable clamp jaw 33 moves clockwise in FIGS. The panel P is rotated so that its tip passes through the clearance groove 1G of the lower mold 1 and clamps the peripheral edge of the panel P with the fixed clamp jaw 29.

As described above, when the peripheral edge portion of the panel P formed and processed by the fixed clamp jaw 29 and the movable clamp jaw 33 of the panel holding device 19 is held and held, the slider of the press machine is raised. When the upper mold is raised, the elevating plate 25 of the panel holding device 19 is pressed downward by the action of the elastic member 27, so that the panel holding device 19 is relatively moved with respect to the punch and the panel holder 7 in the upper mold. The panel P is lowered, and the panel P is largely separated downward from the lower surfaces of the punch and the panel holder 7.

Accordingly, the floating punch is provided inside the punch of the upper die, and it is possible to prevent the panel P from being pressed downward by the floating punch when the upper die starts rising. The panel P can be prevented from being deformed due to being pressed, and from dropping the panel P from the panel holding device 19.

Thereafter, when the upper mold is further raised, as shown in FIG. 4, the panel P is held by the panel holding device 19 so as to be largely separated from the panel holder 7 and the lower surface of the punch. It is raised integrally with the mold.

As understood from the above description,
According to this example, the panel P can be supported in a state in which the panel P is largely separated from the panel holder 7 and the lower surface of the punch by the panel holding device 19 which can move up and down. Even with the configuration, the panel P is not pressed downward by the floating punch, and the panel holding device 1 is not pressed.
9, the panel P can be securely held.

[Brief description of the drawings]

FIG. 1 is an operation explanatory view showing the configuration of a vertically movable panel holding device mounted on a mold device.

FIG. 2 is an explanatory side view showing a configuration of a vertically movable panel holding device mounted on a mold device.

FIG. 3 is an operation explanatory view showing a state in which an upper mold mounted on the mold apparatus is lowered.

FIG. 4 is an operation explanatory view showing a state in which an upper mold mounted on the mold apparatus is raised.

FIG. 5 is an explanatory plan view showing a positional relationship among a die, a panel, and a panel holding device.

FIG. 6 is an explanatory diagram showing a configuration in which a floating punch is provided inside a punch of an upper mold in a mold apparatus including upper and lower molds.

FIG. 7 is an explanatory view schematically showing a configuration of a conventional mold apparatus.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 lower mold 1G relief groove 3 upper mold 5 punch 7 panel holder 17 floating punch 19 panel holding device 21 guide sleeve 23 guide pin 25 elevating plate 27 elastic member 29 fixed clamp jaw 33 movable clamp jaw 37 clamp member 43 fluid pressure cylinder (Actuator) 49 Stopper member

Claims (4)

[Claims] 1. A panel holder comprising upper and lower dies for press-working a plate-like panel, and a panel holder provided on an upper mold and capable of holding a peripheral portion of the pressed panel. A die apparatus, comprising: a panel holder provided so as to be vertically movable with respect to the panel holder. 2. The panel holding device according to claim 1, wherein the panel holding device is provided with a fixed clamp jaw integrally provided on an elevating plate supported up and down with respect to the panel holder, and cooperates with the fixed clamp jaw. A mold apparatus comprising: a movable clamp jaw capable of clamping a peripheral portion of a panel by operating the movable clamp jaw; and an actuator supported by the elevating plate to operate the movable clamp jaw. 3. The method according to claim 1, wherein
A mold device comprising a pressing means for pressing the panel holding device downward with respect to the panel holder when the upper mold is raised. 4. The mold device according to claim 1, wherein the lower mold is provided with a stopper member capable of restricting a downward movement of the panel holding device.