JPH08117858A - Upper die exchanger of sheet bending machine - Google Patents

Abstract

PURPOSE: To make it possible to rapidly exchange upper dies without impairing workability and to execute storage of the dies as well even if the number of the upper dies are >=3. CONSTITUTION: The front part of a ram 1 or table of a sheet bending machine is equipped with a die stock section 8 which supports both end sidles of a suitable number of the upper dies 3 and allows the die to stand by and a freely vertically and longitudinally slidable transporting hand A which supports both right and left end sides of a desired one piece of the die among the upper dies 3 stocked in this stock section 8 and transports the die to a working position. On the other hand, the lower rear part of the ram 1 or table is equipped with a removing hand B which is freely longitudinally slidable, supports both right and left end sides of the upper die 3 lowered from the working position on a frame and removes the die 3, so that the die 3 set in the working position is lowered and is removed by this removing hand B and the upper die 3 transported by the transporting hand A is set in the working position. The upper die 3 removed by the removing band B after setting is supported by the transporting hand A and is stocked in the stock section 8.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a plate bending machine such as a press brake, when the thickness and bending shape of a plate material (hereinafter referred to as "work") are changed and the upper die needs to be replaced. In addition, the present invention relates to a mold exchanging device for enabling the automatic exchange and storage of the mold.

[0002]

2. Description of the Related Art In a plate bending machine, when exchanging an upper die, conventionally, a method of superposing two dies and inverting or shifting them at the time of exchanging them, or arranging them before and after a ram are used. Although the method of directly exchanging the molds is adopted, the former method cannot arbitrarily replace the molds, and the latter method has a limit to the number of molds that can be arranged. Placing many molds can interfere with the bending operation.

When the number of molds is large, the molds may be placed next to the machine to replace the molds.
In this case, not only an extra space is required, but also it takes time to replace the mold.

[0004]

In view of the above-mentioned prior art, the present invention is capable of exchanging upper molds in a short time without impairing workability even when the number of upper molds is three or more. It is an object of the present invention to provide an upper mold exchanging device for a plate bending machine which can perform the storage of the mold and can also store the mold.

[0005]

SUMMARY OF THE INVENTION The present invention has been made for the purpose of solving the above-mentioned problems, and its construction is such that a plurality of upper molds are appropriately provided at the front part of a ram or table of a plate bending machine. Mold stock part that supports both ends of the stand-by, and
The ram or table is equipped with a vertically and vertically slidable transfer hand that supports the right and left ends of a desired one of the upper molds stocked in the stock part and carries it to the processing position. Equipped with a detaching hand for supporting the left and right ends of the upper mold, which is slidable back and forth and lowered from the processing position on the frame, and detaching the mold, is set to the processing position at the lower rear part of the bull. The upper die is lowered and removed by the de-handing, and the upper die conveyed by the conveying hand is set to the processing position, and the upper die removed by the de-handling after setting is conveyed by the conveying hand. It is characterized in that it is supported so as to be stocked in the stock section.

[0006]

According to the present invention, the mold exchanging device, when exchanging the mold,
From the die stock part that supports a large number of upper dies, the desired dies are transported by the transport hand and made to stand by, and the upper dies in the processing position are lowered and removed by the de-handling to be supported, then the transport hand Is moved to set the mold in the standby position to the processing position, and then the mold supported by the de-hand is supported by the transfer hand to be stocked in the stock section. Easy to replace in time.

Further, since at least three or more molds can be stored in the mold stock portion provided in the front part of the ram, no extra space is required for storing the molds and workability is not impaired. .

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, an example of implementing the present invention will be described with reference to the drawings. FIG. 1 is a front view of a press brake to which the present invention is applied,
FIG. 2 is a side view, and FIGS. 3 (a) to 3 (c) and FIGS. 4 (d) to 4 (f) are explanatory views of the mold exchanging process operation.

In the figure, 1 is a ram, and 2 and 2 are the rams 1.
The left and right hydraulic cylinders, 3 is an upper mold, 4 is an upper mold holder, 5 is a lower table formed on the lower front surface of the frame F, and 6 is the lower table 5. With the lower die set at the processing position on the arranged die table 7, the outline of the press brake is constituted by the above, but the present invention is for automatically exchanging the upper die 3 in this plate bending machine. Since this is an apparatus, the upper die automatic changer will be described below.

Numerals 8 and 8 are mold stock portions arranged on both sides of the front portion of the ram 1, and at least three or more supporting members 81 are provided.
Are vertically arranged in rows to support and stock both ends of three or more upper molds 3. In addition, this mold stock part 8
May be arranged in the front part of the table 5. By arranging the stock portion 8 on the front side of the table 5, in order to ensure safety in case of die fall, or maintenance of the die in stock or ease of manual replacement. It is useful.

Reference numerals 9 and 9 denote left and right conveying hand mounting plates mounted via mounting members 10 provided on the hydraulic cylinders 2 and 2, and A denotes rails attached to the left and right conveying hand mounting plates 9. The left and right conveying hands attached to the tip of the rod 12 of the hydraulic cylinder 11 which is vertically movable via 91 are slidable in the front-rear direction by the operation of the hydraulic cylinder 11. still,
The left and right carrier hand mounting plates 9 have rails 9 on both sides.
1, 91, and a guide 92 by a feed screw is vertically installed in the center, and the hydraulic cylinder 11 has the rails 91, 91 on the back surface.
A slider (not shown) slidably held on the
The transfer hand A is mounted on a mounting plate 13 having a guide (not shown) formed by a nut member that is screwed into the guide 92 and guided to move up and down.
By rotating the mounting plate 13 up and down, the mounting plate 13 can be moved up and down, and by the stroke operation of the hydraulic cylinder 11, it can be slid forward and backward.

When holding the mold to be replaced in the transfer hand A, the left and right mounting plates 13, 13 are moved up and down in synchronization with each other, and the left and right hydraulic cylinders 11, 11 are moved forward. Alternatively, by stroking it later, it is moved to a desired position of the mold 3 among the molds supported by the mold stock portions 8 and 8,
After holding both ends of the mold by means such as gripping, the mold is made to stand by at the standby position.

Reference numeral B denotes a hand for supporting the mold 3 when the upper mold 3 attached to the mold holder 4 of the ram 1 is removed, and 14 is attached to both ends of the frame F. The detaching hand attaching plate, 15 is a hydraulic cylinder mounted on the upper portion of the attaching plate 14 along the front-rear direction of the frame F, and the releasing hand B is attached to the tip of the rod 16 thereof, and the strobe of the hydraulic cylinder 15 is attached. -It is slidable in the front-rear direction due to the actuation.

In order to remove the upper die 3 in the processing position from the holder 4, the hydraulic cylinder 15 is driven to slide the de-handing B forward or backward, and the hand B is moved to the upper die. The upper die 3 is moved to a position right below the lower die 3 to be received by the de-handling B, and then the die holder 4 is opened for removal.

In the figure, C is the receiving hand of the lower die 5, 17 is the hydraulic cylinder 15 in the detaching hand mounting plate 14.
A hydraulic cylinder mounting plate mounted vertically so that it can be moved up and down via rails 20, 20 vertically provided on the lower side, 18 is a hydraulic cylinder mounted on the mounting plate 17, and the mounting hand C is the hydraulic cylinder 18 It is attached to the tip of the rod 19. Since the rails 20 and 20 are vertically provided on the detaching hand mounting plate 14 below the cylinder 15 on both front and rear sides, the hydraulic cylinder mounting plate 17 has a slider (not shown) provided on its back surface. No.) is slidably held by the rails 20 and 20, so that the mounting hand C can be raised and lowered by the vertical movement of the hydraulic cylinder mounting plate 17, and the stroke operation of the hydraulic cylinder 18 can be performed. This allows it to slide in the front-back direction.

In an actual device, the lower mold 5 is detached, but the present invention is a replacement device for the upper mold 3 as described above. The description is omitted.

3 (a) to 3 (c) and FIG. 4 (d) show the mold exchanging process operation of the upper mold exchanging device of the present invention having the above-described structure.
It will be described below with reference to (f). Figure 3 (a)
Is bent under normal use, and the transfer hand A
Shows a state in which the die 3n to be used next is held and made to stand by at the standby position, and the detaching hand B shows a state of retracting (retracting) from the processing position.

In FIG. 3 (b), the removing hand B is shown in the hydraulic cylinder 15.
Is moved forward to move it to the position immediately below the die 3u for which the bending process has finished, and the ram 1 is lowered to move it to the holder 4
Shows the state in which the mold 3u that has been detached by the de-handling B is received.

FIG. 3 (c) shows the transfer hand A in the above state (a).
Next, the die 3n held by is moved forward to the position of the opened die holder 4 by lowering the mounting plate 13 and advancing the cylinder 11, and the die holder 4 concerned is moved. The following die 3n is attached to the holder and the holder 4 is clamped.

In FIG. 4 (d), the de-handing B is moved forward a little, the transport hand A is lowered, and the two hands B, A are opposed to each other at the upper side and the lower side. The state in which the mold 3u received by B is being transferred to the transfer hand A is shown.

FIG. 4 (e) shows the transfer hand A in (d) above.
3 shows a state in which the de-handling B, which has completed the delivery of the mold 3 to and from the delivery position, retreats from the delivery position and returns to the position shown in FIG.

In FIG. 4 (f), the transfer hand A transfers the mold 3u transferred from the de-handling B to the support member 81 of the mold stock section 8.
3 (a), the new mold 3m is held, and the mold is returned to the state of FIG. 3 (a) while waiting for the next mold replacement.

[0023]

The upper mold exchanging device of the present invention is as described above, and the upper mold 3 is exchanged by the above-described steps. The exchanging step is controlled by, for example, a computer. As a result, it is possible to automatically replace the upper mold, so it is possible to appropriately replace three or more stored molds with an extremely simple operation compared to the conventional upper mold replacement method.
Bending workability can be improved.

[Brief description of drawings]

FIG. 1 is a front view of a press brake to which the present invention is applied.

FIG. 2 is an enlarged side view of FIG.

3A and 3B are side views showing a first step, a second step, and a third step, respectively, of a die replacement step operation.

FIG. 4 is a side view showing the operation of the mold exchanging process, showing (d) the fourth process, (e) the fifth process, and (f) the sixth process.

[Explanation of symbols]

 A transfer hand B removal hand 1 ram 2 hydraulic cylinder 3,3u, 3n, 3m Upper mold 4 Upper mold holder 5 Lower table 6 Lower mold 7 Die table 8 Mold stock part 9 Transfer hand mounting plate 14 Removal hand mounting plate

Claims (1)

[Claims] 1. A front portion of a ram or table of a plate bending machine,
A die stock part that supports both end sides of a plurality of upper dies as appropriate to stand by, and supports and processes both left and right end sides of a desired one of the upper die stocked in the stock part Equipped with a lifting / lowering and back-and-forth slidable transport hand for transporting to a position, while the left and right ends of the upper die lowered from the machining position on the frame are slidable back and forth at the lower rear part of the ram or table. Equipped with a removing hand for supporting and removing the mold, the upper mold set at the processing position is lowered and removed by the removing hand, and the upper mold conveyed by the transfer hand is set at the processing position. In addition to the above, an upper mold exchanging device in a plate bending machine is characterized in that an upper mold removed by a de-handling after setting is supported by a transfer hand and stocked in the stock section.