JPH073831U - Mold set automatic exchange press machine - Google Patents

Abstract

(57) [Abstract] [Purpose] To provide a press device that solves the interference between the die set that is rotationally moved during die replacement and the ram in the press device and that allows the die set to be directly placed in the press position during die replacement. [Composition] A press position P is set between both side walls on the front of the frame 3, a ram 11 of a press mechanism is vertically movable just above the press position, and a stocker 5 horizontally equipped with a plurality of die sets 6 has a horizontal axis 4 The die set 6 is pivotally supported by the frame 3 so that each die set 6 can be arranged at the press position by the rotation of the stocker 5. A ram retracting mechanism 23 is provided for moving the ram 11 of the press mechanism upward from the movement trajectory of the die set 6 when the stocker 5 is rotated. The ram retraction mechanism 23 is a guide shaft 22 of the ram 11.
And a folding link 32 and a folding link driving device 33 incorporated between joint shafts 25 connected to an eccentric cam 24 for vertically moving the ram.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a press device used for edge processing of a frame material.

[0002]

[Prior art]

 In the press work, even if the mold is easily replaced, there is a risk that the mold is heavy and it is hard work even if it is a simple one, and it is a work to insert a hand into the press position. . On the other hand, aging and feminization are progressing in factories, and it is necessary to improve the working environment.

In response to such a request, as shown in FIG. 11, there is a press device 2 having a die changer 1 for automatically changing dies attached thereto. In the die changer 1, a plurality of (four in the figure) die sets 6 (a type of die set) are horizontally mounted on a horizontal stocker 5 mounted on a frame 3 and rotated by a horizontal shaft 4 mounted on the horizontal stocker 4. It is installed in parallel with and the necessary die set 6 is moved to the front position by rotating the stocker 5. In the die set 6, an upper punch plate 7 and a lower die plate 8 are usually arranged so as to face each other, and are connected by a guide rod 9 and a return spring 10. The movable side of the mold is fixed to the punch plate 7, and the fixed side is fixed to the die plate 8. That is, the die is exchanged by rotating the stocker 5 and exchanging the position of the die set 6. Reference numeral 11 is a ram that 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 from each other, 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 air. It is moved using an actuator 12 such as a cylinder. Therefore, in this method, replacement of the mold (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, moving the die set 6 to the storage position, and stocker. Since the process is 5 rotations, it takes time to replace the mold.

Further, since the die changer 1 and the pressing device 2 are separated, there is a problem that the floor area to be occupied is large. 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 the die set 6 is moved directly to the press position P by the rotation of the stocker 5. Then, as shown in FIG. 12, the rotating die set 6 for exchanging the mold collides with the ram 11 located at the press position P.

[0006]

[Problems to be solved by the device]

 The present invention solves the interference between the die set rotated by the die changer and the ram in the pressing device when exchanging the die, and provides a press device in which the die set can be directly placed in the press position by the die changer. Is an issue.

[0007]

[Means for Solving the Problems]

 The press device is placed within the range of the die changer, 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 walls on the front of the frame. The ram of the press mechanism is vertically movable just above the press position. A stocker equipped with multiple mold sets horizontally is pivotally supported on the frame so that it can rotate on a horizontal axis. Each mold set can be placed in the press position by rotating the stocker. When the stocker is rotated, a ram retracting mechanism that moves the ram of the press mechanism above the moving path of the mold set is provided.

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

[0009]

[Action]

 The ram retraction mechanism moves the ram of the press mechanism above the moving path of the mold set when the stocker equipped with the mold set is rotated. This avoids interference between the die set moved for die exchange and the ram in the press machine.

[0010]

【Example】

 1 to 5 show a die set automatic changing press device 13 as a first embodiment. As shown in FIG. 2, the frame 3 has a sturdy casing structure including left and right walls 14a and 14b, and a press position P is set between both side walls 14 (a, b) on the front side. A stocker 5 is rotatably mounted on a central horizontal shaft 4 between the left and right walls 14 (a, b) of the frame 3 and is rotated by a stocker drive motor 16 via a gear 15. There is.

The stocker 5 is provided with sturdy discs 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 discs 17 (a and b). It is mounted at 18. Like the conventional die set 6, the die set 6 may include a punch plate 7, a guide rod 9 and a return spring 9, but the die set 6 is not provided with the die set on the die plate 8. In some cases, it will be referred to as a mold set 6 hereinafter. An attitude maintaining gear 19 is fixed to each of the rotary shafts 18, and each gear 19 is meshed with a central gear 21 integrated with the frame 3 via an idle gear 20. These gears 19, 20 and 21 have a structure similar to that of a planetary gear train so that even if the stocker 5 is rotated, each mold set 6 is always maintained in a predetermined upright posture. ing. 2 and 3, reference numerals m1, m2, and m3 denote molds. Further, these drawings show only one mold set 6 in order to avoid complication of the drawings, and schematically show only a part of the molds.

Left and right guide shafts 22a and 22b are slidably mounted in an upper and lower direction on the left and right sides of the front side of the frame 3, and both ends of the ram 11 are fixed to the upper portions of these guide shafts 22a and 22b. That is, the ram 11 is vertically movable via the left and right guide shafts 22a and 22b. 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 retraction mechanisms 23a, 23b, respectively. The eccentric cam 24 is mounted on a cam drive shaft 26, and the cam drive shaft 26 is interlocked with a ram drive motor 30 via an electric clutch 27, a pulley 28, and a belt 29. Reference numeral 31 is an electric brake that brakes the rotation of the cam drive shaft 26.

The guide shaft 22 (a, b), the joint shaft 25, the eccentric cam 24, the cam drive shaft 26, the electric clutch 27, the pulley 28, the belt 29, the ram drive motor 30, and the electric brake 31 move vertically in the ram. It constitutes the mechanism.

The ram retracting mechanism 23 (a, b) is composed of a folding link 32 and a folding link drive device 33 in this embodiment. The folding link 33 includes a push-up link 34, a drive link 35, and a guide link 36. The upper end of the push-up link 34 is rotatably connected to the lower end of the guide shaft 22, and one end of the drive link 35 is at the lower end of the push-up link 34. And the other end of the drive link 35 is rotatably supported on the upper end of the guide link 36 by the drive shaft 37, and the lower end of the guide link 36 is rotatably connected to the upper end of the joint shaft 25. ing. The drive shaft 37 is connected to the drive links 36 in the left and right ram retraction mechanisms 23, and the hydraulic rotary actuator as the folding link drive device 33 is connected to the central portion thereof.

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

With the above structure, the press operation is performed in the state of FIG. That is, the selected mold set 6 is moved to the front press position P and is 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. And 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 mold “open” position, and the movable mold of the punch plate 7 is positioned above by the return spring 10.

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

When replacing the mold set 6 (mold), first, the folding link drive device 33 (hydraulic rotary actuator) is driven. Then, the drive shaft 37 drives the drive link 35 in the left and right folding links 32 in the counterclockwise direction in FIGS. 1 and 3 to rotate the lower end of the push-up link 34 backward so as to extend the folding link 32. Then, the push-up link 34 is pushed upward by rotating the push-up link 34 (FIG. 4 → FIG. 5). As a result, 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. 1 and 2. The amount of upward movement is about twice the length of the drive link 35, and as shown in FIG. 1, even if the mold set 6 is rotated by the stocker 5, it does not interfere with this.

At the same time when the ram 11 is moved to the retracted position, the lock pin 38 is pulled out from the lock hole 382 of the posture maintaining gear 19. Next, the stocker 5 is driven and rotated via the stocker drive motor 16 and the gear 15, and the mold set 6 containing the necessary molds is placed at the front press position P and stopped.

The folding link driving device 33 is reversed, so that the folding link 32 is contracted (folded) and the ram 11 is placed in the original mold “open” position (FIG. 5 → FIG. 4). At the same time, the lock pin 38 is inserted into the lock hole 382 of the posture maintaining gear 19 of the new mold set 6, and the mold set 6 is fixed in position and ready to support the press load. This completes the replacement of the mold set 6, and the worker can restart the press operation using a new mold.

In the above, for example, the stocker 5 has a specific configuration such as a mechanism for indexing each die set 6 to the front press position and an intermittent rotation mechanism for accurately stopping at the indexing position. Omitted. The number of 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 structure as long as the drive shaft 37 can rotate forward and backward and the drive shaft 37 can move up and down in response to a press operation.

FIG. 7 shows a second embodiment, which is different from the first embodiment in the ram retraction mechanism 23. In this embodiment, the ram 11 is mounted on the left and right guide shafts 22 of the ram vertical movement mechanism via the ram retraction mechanism 23. That is, the ram retraction mechanism 23 is screwed at the ends thereof to the cam pins 39 fixed to the upper ends of the left and right guide shafts 22, the slant groove cam body 40 combined therewith, and the female screw 41 provided on the slant groove cam body 40. The left and right feed screw bodies 42 and the feed screw body drive device 43 (electric motor) for driving the left and right feed screw bodies 42 at the same time are configured, and the oblique groove of the oblique groove cam body 40 is engaged with the cam pin 39. There is.

When the feed screw body 42 is rotated by the feed screw body drive device 43, the slant groove cam body 40 is pulled or pushed out together, and its interval is changed, and at the same time, it moves vertically. , Change the ram position. This allows the ram 11 to be moved to the retracted position when needed. According to this embodiment, the vertical movement of the ram 11 is smooth, and it is easy to arbitrarily change the moving amount for retreat according to the size of the mold set 6. The feed screw body 42 and the female screw 41 are ball screws, nuts, etc., and are configured such that the nuts move in opposite directions on the left and right. The feed screw drive device 43 is provided with a brake for maintaining the position of the ram 11.

FIG. 8 shows a third embodiment, which is different from the first embodiment in the ram retraction mechanism 23. In this embodiment, the ram 11 is mounted on the left and right guide shafts 22 of the ram vertical movement mechanism via the ram retraction mechanism 23. That is, the ram retraction 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 meshed with the rack 44, and a pinion drive device 46. Therefore, when the pinion drive device 46 drives the pinion 45, the ram 11 moves up and down together with the pinion drive device 46. This allows the ram 11 to be in the retracted position. In this device as well, a brake for preventing the rotation of the pinion 45 to maintain the position of the ram 11, or a movable stopper is required. In this embodiment, the ram retracting mechanism can be constructed relatively easily.

FIGS. 9 and 10 show another type of mold set 6. The die set 6 has a structure in which a fixed side die 46 and a movable side die 47 are combined and directly arranged on a die plate 8, 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 that is driven to open and close by an air actuator 48 fixed to the ram 11 side is attached to the ram 11 so as to be vertically movable. A plurality of air actuators 48 are arranged on the ram 11 so that they can be individually operated. The holder 50 is constantly urged downward by a spring 51 arranged between the holder 11 and the ram 11, and the air actuator is fixed by a fixing pin 53 engaged with a long hole 52 provided in the clamp claw 49. 48 (FIG. 9). The other structure is similar to that of the first embodiment, and therefore the detailed description of the structure is omitted. The air actuator may be a hydraulic actuator.

When the stocker 5 is rotated to be placed in the new mold set 6 or the press position P, the ram 11 in the retracted position is lowered, and the lower surface of the holder 50 is on the movable side of the mold set 6. Contact the mold 47. The clamp claw 49 is open (FIGS. 9a and 9b). The air actuator 48 is driven upward, the clamp claw 49 is closed (FIG. 9b → c), and the movable side 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 joined to the ram 11, and thereafter, the pressing work by the operator is performed. When the mold set 6 is replaced, first, the air actuator 48 is driven downward, the clamp claw 49 is opened, and the movable mold 47 is released. Then, the ram 11 is raised to the retracted position. When such a mold set 6 is used, it is possible to selectively drive only the necessary mold among the molds incorporated as the mold set 6.

The above is an embodiment, and the present invention is not limited to the illustrated specific configuration. For example, as the ram retraction mechanism, a structure may be adopted in which the ram 11 is directly pushed upward by a vertical hydraulic actuator that is arranged separately from the ram vertical movement mechanism. However, in this case, between the guide shaft 22 and the ram 11, 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.

[0029]

[Effect of device]

 It has a structure in which a conventional die changer and a pressing device are integrated so that the floor occupying area is small, and the die set can be directly and quickly placed at the pressing position.

[Brief description of drawings]

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

FIG. 2 is a front view with a part omitted (the ram is in a retracted position).

FIG. 3 is a front view with a part omitted (the ram is in a press position).

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

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

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

FIG. 7 is a front view with a part omitted (second embodiment).

FIG. 8 is a front view (third embodiment) with a part omitted.

9A to 9D are front views for explaining a coupling state of a mold set and a ram.

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

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

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

[Explanation of symbols]

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

Claims (2)

[Scope of utility model registration request] 1. A press position is set between both side walls on the front of the frame, a ram of a press mechanism is vertically movable just above the press position, and a stocker equipped with a plurality of mold sets horizontally is a horizontal shaft. A press device that is rotatably supported by a frame and that can position each mold set at a press position by rotating the stocker. A die set automatic exchange press device characterized by being provided with a ram retracting mechanism for removing it from the movement path of the die set. 2. A folding link in which both ends of a ram are fixed to guide shafts of a ram vertical movement mechanism, and a ram retraction mechanism is incorporated between the guide shaft and a joint shaft connected to an eccentric cam for ram vertical movement. The folding link is composed of a push-up link, a drive link, and a guide link.The upper end of the push-up link is rotatably connected to the lower end of the guide shaft, and one end of the drive link is connected to the push-up 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 pivotally connected to the upper end of the joint shaft. The folding link drive is connected to the, and the folding link expands and contracts in the vertical direction by the rotation of the driving link. The die set automatic exchange press device according to claim 1, wherein