JP2585787Y2 - Die set automatic change press machine - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a press device used for processing an end portion of a frame material.

[0002]

2. Description of the Related Art In a press operation, the exchange of a mold is a heavy labor due to the heavy weight of the mold, even if the exchange of the mold is simple. With danger. On the other hand, the aging and feminine aging of factories has made it necessary to improve the working environment.

[0003] In response to such a demand, there is a press apparatus 2 provided with a die changer 1 for automatically exchanging dies as shown in FIG. The die changer 1 includes a stocker 5 that is pivotally mounted on a frame 3 around a horizontal shaft 4.
In addition, a plurality of (four in the figure) die sets 6 (a kind of mold set) are provided horizontally and in parallel with the horizontal axis 4, and the die set 6 required by rotating the stocker 5 is provided.
Is moved to the front position. Die set 6
Usually, an upper punch plate 7 and a lower die plate 8 are arranged to face each other, and are connected by a guide rod 9 and a return spring 10. The mold has a movable side fixed to the punch plate 7 and a fixed side fixed to the die plate 8. That is, the exchange of the mold is performed by rotating the stocker 5 and exchanging the position of the die set 6. Sign 1
Reference numeral 1 denotes a ram which moves up and down in the press device 2 and presses the punch plate 7 to perform press working.

In such a press device with a die changer, the die changer 1 and the press device 2 are separated, and the die set 6 stored in the stocker 5 of the die changer 1 is moved to the press position P of the press device 2 by an air cylinder. The movement is performed using an actuator 12 such as the above. For this reason, in this method, the exchange of the die (die set 6) is performed by rotating the stocker 5 in the die changer 1, moving the die set 6 to the press position P, pressing operation,
Since the process involves moving the die set 6 to the storage position and rotating the stocker 5, it takes time to replace the mold.

A die changer 1 and a press device 2
However, there is a drawback in that the floor space occupied is large because of the separation. In order to omit the movement of the die set 6 by the actuator 12 and to reduce the occupied floor area, the die changer 1 and the press device 2 are integrated, and by rotating the stocker 5, the die set 6 is directly moved to the press position P. Then, as shown in FIG. 12, the die set 6 rotating for mold replacement collides with the ram 11 located at the press position P.

[0006]

This invention solves the interference between the die set rotated by the die changer and the ram in the press device when the die is replaced, and the die set is directly moved to the pressing position by the die changer. It is an object to provide a press device that can be arranged.

[0007]

A press device is arranged within the range of the die changer, and the die changer and the press device are integrated, and the following configuration is adopted for the press device. The press position is between the two side walls at the front of the frame.
A ram of a press mechanism is disposed directly above the press position so as to be vertically movable. A stocker horizontally equipped with a plurality of mold sets is rotatably supported by a frame on a horizontal axis. Each of the mold sets can be arranged at the press position by rotating the stocker. A ram retracting mechanism is provided for moving the ram of the press mechanism above the locus of the mold set when the stocker is rotated.

The following is a preferred example of the ram retracting mechanism. Both ends of the ram are fixed to a guide shaft of a ram vertical movement mechanism, and a fold retraction mechanism is incorporated between the guide shaft and a joint shaft coupled to an eccentric cam for vertical movement of the ram. And the folding link is expanded and contracted in the vertical direction by the rotation of the drive link.

[0009]

The ram retracting mechanism moves the ram of the press mechanism above the locus of the mold set when the stocker equipped with the mold set is rotated. Thus, interference between the mold set moved for mold exchange and the ram in the press device is avoided.

[0010]

FIG. 1 to FIG. 5 show an automatic mold set changing press 13 as a first embodiment. Frame 3 is shown in FIG.
As shown in Fig. 5, a strong housing structure having left and right walls 14a and 14b has a press position P set between the front side walls 14 (a, b). The left and right walls 14 (a,
Between b), the stocker 5 is rotatably supported on the center horizontal shaft 4 and is driven and rotated by the stocker drive motor 16 via the gear 15.

The stocker 5 has solid disks 17a and 17b on both left and right sides of the horizontal shaft 4, and four (plural) mold sets 6 are horizontally rotated between the disks 17 (a and b), respectively. It is mounted on a shaft. The mold set 6 may include a punch plate 7, a guide rod 9 and a return spring 9 as in the case of the conventional die set 6, but the mold is disposed on the die plate 8 without these. Therefore, it is referred to as a mold set 6 hereinafter. An attitude maintaining gear 19 is fixed to each of the rotating shafts 18, and the gear 19 is an idle gear 20.
Through a central gear 21 integral with the frame 3. These gears 19, 20, and 21 have a structure similar to a planetary gear train, so that each mold set 6 always maintains a predetermined correct vertical posture even when the stocker 5 is rotated. I have. In FIGS. 2 and 3, reference numerals m1, m2, and m3 indicate molds. In addition, these figures show only one mold set 6 to avoid complicating the drawings, and only schematically show a part of the mold set.

Left and right guide shafts 22a and 22b are vertically slidably mounted on the left and right sides of the front side of the frame 3, and both ends of the ram 11 are fixed above these. That is, the left and right guide shafts 22a, 22
The ram 11 can be moved up and down via b.
The lower ends of the guide shafts 22 (a, b) are connected to a joint shaft 25 connected to a lower eccentric cam 24 via ram retracting mechanisms 23a, 23b, respectively.
The eccentric cam 24 is mounted on a cam drive shaft 26, and the cam drive shaft 26 is operatively connected to a ram drive motor 30 via an electric clutch 27, a pulley 28 and a belt 29. Reference numeral 31 denotes an electric brake for braking the rotation of the cam drive shaft 26.

The guide shafts 22 (a, b), the joint shaft 25, the eccentric cam 24, the cam drive shaft 2
6. The electric clutch 27, the pulley 28, the belt 29, the ram drive motor 30 and the electric brake 31 constitute a ram vertical movement mechanism.

The ram retracting mechanism 23 (a, b) comprises a folding link 32 and a folding link driving device 33 in this embodiment. The folding link 33 includes an up link 34, a drive link 35, and a guide link 36. The upper end of the up link 34 is rotatably connected to the lower end of the guide shaft 22.
5 is rotatably connected to the lower end of the push-up link 34, and the other end of the drive link 35 is connected to the guide link 36.
And a lower end of a guide link 36 is rotatably connected to an upper end of the joint shaft 25. The drive shaft 37 connects the drive links 36 of the left and right ram retracting mechanisms 23, and a hydraulic rotary actuator as a folding link drive device 33 is connected to the center of the drive link 36.

In this actuator, the rotor is fixed to the cam drive shaft 26, and the casing is mounted on the frame 3 so as to be vertically movable, but is prevented from rotating. In FIG. 1, reference numeral 38 denotes a lock pin,
, And can be moved forward and backward in the horizontal direction by a hydraulic actuator 381 (FIG. 6). When the ram 11 descends from the retracted position, the ram 11 is fitted into the lock hole 382 formed in the attitude maintaining gear 19, and when the ram 11 is elevated to the retracted position, the ram 11 is operated so as to come out of the lock hole 382.

With the above structure, the press operation is performed in the state shown in FIG. That is, the selected mold set 6 is moved to the front pressing position P and fixed by the lock pin 38, the folding link 32 in the ram vertical movement mechanism is folded, and the ram 11 is in the operating position,
It is in contact with the punch plate 7 in the mold set 6.
However, the eccentric cam 24 is at the top dead center position, the ram 11 is at the "open" position of the mold, and the movable mold of the punch plate 7 is located above by the return spring 10.

In this state, when a workpiece such as a frame material is interposed between the fixed mold and the movable mold and the press switch is pressed, the electric brake 31 is released and at the same time, the cam is moved by the electric clutch 27. The drive shaft 26 and the pulley 28 are linked and connected. Then, the eccentric cam 24 is rotated once by the power of the cam drive motor 30, and the ram 11 presses the punch plate 7, and then returns to the above-described mold open position. Press work is performed during this time, and then the electric brake 31 is operated to release the power transmission by the electric clutch 27, and the press operation is awaited. The pressing load at the time of pressing is supported by the lock pin 38.

When replacing the mold set 6 (mold),
First, the folding link driving device 33 (hydraulic rotary actuator) is driven. Then, the drive shaft 37 is
1 and 3, the drive link 35 of the left and right folding links 32 is driven to rotate counterclockwise, and the lower end of the push-up link 34 is initially rotated rearward so that the folding link 32 is extended, and then rotated upward. Then, the push-up link 34 is pushed up (FIG. 4 → FIG. 5). Thereby, the left and right guide shafts 22 (a, b) are simultaneously moved upward, and the ram 11 is moved to the upper retracted position shown in FIGS. The amount of upward movement is determined by the drive link 35
Is approximately twice as long as the stocker 5 as shown in FIG.
Is a position where the mold set 6 does not interfere with the rotation even when the mold set 6 is rotated.

At the same time as the ram 11 is moved to the retracted position, the lock pin 38 is
Removed from 2. Next, the stocker 5 is driven and rotated via the stocker driving motor 16 and the gear 15,
The mold set 6 containing the required molds is arranged at the front pressing position P and stopped.

The folding link driving device 33 is reversed, the folding link 32 is contracted (folded), and the ram 11 is placed in the original "open" position (FIG. 5 → FIG. 4). At the same time, the lock pin 38 is moved to the new mold set 6.
Is inserted into the lock hole 382 of the posture maintaining gear 19,
Preparations are made to support the press load while fixing the position of the mold set 6. This completes the replacement of the mold set 6,
The operator can resume the press operation using the new mold.

In the above description, for example, the stocker 5 has a specific structure such as a mechanism for splitting each mold set 6 to the front press position, an intermittent rotation mechanism for accurately stopping at the split position, and the like. Omitted. The number of the mold sets 6 stored in the stocker 5 is not limited to four.
Further, the folding link drive device 33 is not limited to a rotary actuator, and may be any device having a structure capable of rotating the drive shaft 37 forward and backward and moving the drive shaft 37 up and down in response to a press operation.

FIG. 7 shows a second embodiment, in which a ram retracting mechanism 23 is different from that of the first embodiment. In this embodiment, the ram 11 is mounted on a left and right guide shaft 22 of a ram vertical movement mechanism via a ram retracting mechanism 23. That is,
The ram retracting mechanism 23 has its ends screwed into cam pins 39 fixed to the upper end portions of the left and right guide shafts 22, the oblique groove cam body 40 combined with the cam pins 39, and the female screw 41 provided on the oblique groove cam body 40. The left and right feed screw bodies 42 and the feed screw body driving device 43 for simultaneously driving the left and right feed screw bodies 42
(Electric motor), and the oblique groove of the oblique groove cam body 40 is engaged with the cam pin 39.

The feed screw 42 is driven by the feed screw drive 43.
When the is rotated, the oblique groove cam body 40 is pulled or pushed together to change the interval, and at the same time, moves up and down to change the position of the ram. Thereby, the ram 11 can be moved to the retracted position when necessary. According to this embodiment, the vertical movement of the ram 11 is smooth,
Further, it is easy to arbitrarily change the amount of movement for evacuation according to the size of the mold set 6. The feed screw body 42 and the female screw 41 are ball screws and nuts, and the like.
The left and right sides are configured so that the moving directions of the nuts are reversed. The feed screw body driving device 43 includes a brake for maintaining the position of the ram 11.

FIG. 8 shows a third embodiment, in which a ram retracting mechanism 23 is different from that of the first embodiment. In this embodiment, the ram 11 is mounted on a left and right guide shaft 22 of a ram vertical movement mechanism via a ram retracting mechanism 23. That is,
The ram retracting mechanism 23 includes a vertical rack 44 fixed to the left and right guide shafts 22, a pinion 45 pivotally supported on the ram side and meshing with the rack 44, and a pinion driving device 46. Therefore, when the pinion 45 is driven by the pinion driving device 46, the ram 11 is moved up and down together with the pinion driving device 46. Thereby, the ram 11 can be set to the retracted position. In this device as well, the rotation of the pinion 45 is prevented and the ram 1
A brake or a movable stopper for maintaining the position 1 is required. In this embodiment, the ram retracting mechanism can be configured relatively easily.

FIGS. 9 and 10 show another type of mold set 6. This mold set 6 is provided with a die plate 8
It has a structure in which the fixed mold 46 and the movable mold 47 are directly arranged in combination, and does not have a member corresponding to the punch plate 7. On the other hand, on the ram 11 side,
A holder 50 having a clamp claw 49 driven to be opened and closed by an air actuator 48 fixed to the
1 is mounted so as to be vertically movable. A plurality of air actuators 48 are arranged on the ram 11,
It can be activated individually. The holder 50 is constantly urged downward by a spring 51 disposed between the holder 50 and the ram 11, and is connected to the air actuator 48 via a fixing pin 53 engaged with a long hole 52 provided in a clamp claw 49. (FIG. 9). The other configuration is the same as that of the first embodiment, and the description of the specific configuration will be omitted. Note that the air actuator may be a hydraulic actuator.

When the stocker 5 is rotated to place the new mold set 6 or the press position P, the ram 11 at the retracted position is lowered, and the lower surface of the holder 50 is moved to the movable side of the mold set 6. It contacts the mold 47. The clamp claws 49 are open (FIGS. 9a and 9b). Air actuator 4
8 is driven upward, and the clamp claws 49 are closed (FIG. 9).
b → c), the movable mold 47 is engaged. The air actuator 48 is further driven upward to raise the movable mold 47 together with the holder 50 and bring the upper surface of the holder 50 into contact with the inner wall surface of the ram 11 (FIG. 9D).

As a result, the mold set 6 is connected to the ram 11, and thereafter, a pressing operation is performed by the operator. When the mold set 6 is replaced, first, the air actuator 48 is driven downward to open the clamp claw 49,
The movable mold 47 is released. Next, the ram 11 is raised to the retracted position. When such a mold set 6 is used, only necessary ones among the molds incorporated as the mold set 6 can be selectively driven.

The above is an embodiment, and the present invention is not limited to the illustrated specific configuration. For example, the ram retracting mechanism may have a structure in which the ram 11 is directly pushed upward by a vertical hydraulic actuator arranged separately from the ram vertical movement mechanism. However, in this case, a detaching device that can release the connection with the guide shaft 22 when the ram 11 is moved to the retracted position is required between the guide shaft 22 and the ram 11.

[0029]

According to the present invention, the conventional die changer and the press device are integrated, the floor occupied area is small, and the mold set can be quickly and directly arranged at the press position.

[Brief description of the drawings]

FIG. 1 is a side view for schematically explaining a structure.

FIG. 2 is a front view (a ram is in a retracted position) partially omitted.

FIG. 3 is a front view (a ram is in a pressed position) of a partly omitted illustration.

FIG. 4 is a side view for explaining the operation (in a contracted state).

FIG. 5 is a side view for explaining the operation (extended state).

FIG. 6 is a front view (partial cross section) for explaining a locking operation.

FIG. 7 is a front view showing a part of the embodiment (second embodiment).

FIG. 8 is a front view showing a part of the embodiment (third embodiment).

FIGS. 9A to 9D are front views for explaining a connection state between a mold set and a ram.

FIG. 10 is a side view for explaining the situation of mold replacement.

FIG. 11 is a side view schematically showing a structure (conventional example).

FIG. 12 is a side view schematically showing a structure (trial example).

[Explanation of symbols]

 Reference Signs List 3 frame 4 horizontal axis 5 stocker 6 die set (die set) 11 ram 13 die set automatic exchange press device 22 guide shaft 23 ram retreat mechanism 25 joint shaft 32 folding link 33 folding link driving device 34 push-up link 35 drive link 36 Guide link

Claims (2)

(57) [Scope of request for utility model registration] A press position is set between both side walls in front of a frame, and a ram of a press mechanism is disposed immediately above the press position so as to be vertically movable, and a stocker equipped with a plurality of mold sets in a horizontal axis is provided. A press device that is rotatably supported by a frame and can place each mold set at a press position by turning the stocker. When the stocker is turned, the ram of the press mechanism is moved. An automatic mold set changing press, comprising a ram retracting mechanism for removing the ram from the movement locus of the mold set. 2. A folding link in which both ends of a ram are fixed to a guide shaft of a ram vertical movement mechanism, and a ram retracting mechanism is incorporated between the guide shaft and a joint shaft connected to an eccentric cam for vertical movement of the ram. And a foldable link driving device. The foldable link is composed of a push-up link, a drive link, and a guide link. The lower end of the drive link is pivotally connected to the upper end of the guide link, and the lower end of the guide link is rotatably connected to the upper end of the joint shaft. Folding link drive unit is connected to and the folding link expands and contracts by turning the drive link The automatic die set changing press device according to claim 1, wherein the pressing is performed.