JPH04158926A - Die-set system die for bending and device for automatically changing die using its die - Google Patents

Abstract

PURPOSE:To make it unnecessary to execute centering for die and to easily attach the die to the bending machine by supporting an upper die holder holding an upper die and a lower die holder holding a lower die with both guide posts and making the upper and lower dies to one body. CONSTITUTION:A lower die 23 is fixed on a lower die holder 19, an upper die 27 is fixed on the lower side of an upper die holder 21 with a fixing tool 29. A guide post supporting device 29R, L are set at both sides of the upper die holder 21, guide posts 31R, L are attached in standing at both sides of the lower die holder 19. And springs 33R. L are interposed between the guide post supporting device 29R, L and the lower die holder 19, the holder 19 is kept at the regular interval between the upper die holder 21 with the energized force of the springs 33R, L. Therefore, in the die set system die for bending 17 the lower die 23 and the upper die 27 are held integrally and the centering of the upper and lower dies 23 and 27 is completed, so the centering work on the machine is neglected, and the bending work can be started immediately.

Description

[Detailed Description of the Invention] [Object of the Invention] (Industrial Application Field) This invention provides a bending die set type mold which is an improved mold used in a bending machine, and a bending die set type mold using this mold. Related to automatic mold changing device.

(Prior Art) Conventionally, as for bending molds used in a bending machine, an upper mold (punch) and a lower mold (die) are generally attached separately to the bending machine.

In addition, each mold attached to the bending machine costs approximately 1 kg.
It weighs more than 1.5 oz. and the normal upper mold and lower mold are a set, so two molds (or more depending on the bending length) must be replaced, and the mold must be replaced. Workers tightened bolts to secure it.

(Problem to be solved by the invention) By the way, when attaching the upper mold and the lower mold to the bending machine, since they are installed separately, it is necessary to center the upper mold and the lower mold. There was a problem in that the centering work was very troublesome.

In addition, at least two molds must be replaced, and an operator must tighten bolts one by one to secure the molds, which requires a great deal of labor and time.

SUMMARY OF THE INVENTION An object of the present invention is to provide a bending die set mold in which an upper mold and a lower mold are integrally held, thereby eliminating the work of centering the molds.

Another object of the present invention is to provide an automatic mold changing device that uses a bending die set type mold and allows molds to be replaced easily and in a short time. be.

[Structure of the Invention] (Means for Solving the Problems) In order to achieve the above object, this invention holds a lower mold in a lower mold holder, holds an upper mold in the upper mold holder, and Both sides of the upper die holder and the lower die holder were supported by guide posts to integrate the upper die and the lower die to constitute a bending die set type die.

The present invention also provides an automatic mold changing device that is installed adjacent to the bending machine and automatically changes the bending die set type mold from the processing section of the bending machine. A mold storage rack that can be moved back and forth and stores a plurality of folding die set molds at intervals, and a mold storage rack that can be moved back and forth to accommodate a plurality of bending die sets on the processing line of the bending machine. The bending die set type mold is used to move the bending die set type mold into and out of the processing section of the bending machine while positioning the bending die set type mold selected from the bending die set type mold. An automatic mold changing device comprising: a mold chucking device for chucking the mold; and a movable mold moving device for moving the bending die set mold in the left and right direction. did.

(Function) By adopting the bending die set type mold of this invention, the lower mold holder holding the lower mold and the upper mold holder holding the upper mold are supported by guide posts on both sides. Therefore, the upper and lower molds are centered in advance and set and integrated. Therefore, when this mold is attached to the processing section of the bending machine, there is no need to perform centering work on the mold.

In addition, by adopting the automatic mold changing device of the present invention, when setting a bending die set type mold in the processing section of a bending machine, the mold storage rack is moved back and forth, and the mold A predetermined die is selected from a plurality of bending die set molds stored in a storage rack and positioned on the processing line of the bending machine, and a part of the predetermined die is picked up by a die chucking device. chucking.

Next, the predetermined die is set in the processing section of the bending machine by moving the predetermined die to the processing section of the bending machine using the die moving device. After a predetermined mold is set in the processing section of the bending machine, the mold chucking device is returned to its original position by the mold moving device.

In addition, the predetermined mold set in the processing section of the bending machine is
The mold is moved to the processing section of the bending machine by the mold moving device and is chucked by the mold chucking device. Next, by returning the mold chucking device to its original position using the mold moving device, the predetermined mold is stored in the mold storage rack from the processing section of the bending machine.

In this way, a given mold is automatically exchanged in a short time between the processing section of the bending machine and the mold storage rack in the automatic mold exchange device provided adjacent to the bending machine.

(Example) Hereinafter, an example of the present invention will be described in detail based on the drawings.

Referring to FIG. 1, for example, a press brake 1 as a bending machine is equipped with a C-shaped side frame 3 erected on the left and right sides, and an upper table 5 is mounted on the front side of the upper part of the side frame 3. It is fixedly installed. The upper mold holder 7 or a plurality of fixing fittings 9 are fixed to the lower part of the upper table.

On the other hand, a lower table 11 is provided on the lower front side of the side frame 3 and is movable up and down by, for example, a hydraulic cylinder (not shown). A U-shaped guide rail 13 extending in the left-right direction is integrally provided on the lower table 11. A plurality of mold fixing hydraulic cylinders 15 are provided at appropriate intervals in the left and right direction of this guide rail 13.

The above-mentioned bending die set type mold, which will be described later, is moved from the right direction in Fig. 1 to the light rail 13.
By operating the mold fixing cylinder 15,
A bending die set type mold is fixed to the guide rail]3.

As shown in FIGS. 2 and 3, the bending die set type mold 17 includes a lower mold holder 19 and an upper mold holder 21. A lower mold (die) 23 is fixed on the top with a plurality of bolts 25. On the other hand, an upper mold (punch) is provided at the bottom of the upper mold holder 21.
27 is fixed with a plurality of fixing fittings 29.

Guide post support devices F29R, 29L are provided on both sides of the upper mold holder 21, and guide posts 31 erected on both sides of the lower mold holder 19 are provided on the guide post support devices 29R, 29L. ．． R, 31L is installed. Moreover, the guide post support device 29R, 2
A spring 33R is installed between 9L and the lower mold holder 19.
, 33L are interposed, and springs 33R, 33L
Due to the urging force, the lower mold holder 19 is maintained at a constant distance from the upper mold holder 21. In other words, lower mold 2
3 is held at a constant distance from the upper mold 27.

Therefore, the bending die set type mold 17 is the lower mold 2.
3 and an upper mold 27 are integrally held by guide posts 31R331L.

With the above configuration, the bending die set type mold 17 is
The guide rail 13 has been moved from the right side in the figure.
When positioned above, the mold fixing cylinder 15 is activated and the mold is fixed to the guide rail 13.

In this state, the lower table 11 is raised by placing a workpiece on the lower mold 23 and activating a hydraulic cylinder (not shown).

Then, the lower mold 23 rises via the lower mold holder 19, and the lower mold 23 contacts the upper mold 27 via the workpiece.
In this state, the upper mold holder 21 comes into contact with the upper mold holder 7 provided at the lower part of the upper table 5 via the upper mold 27. Further, as the lower table 11 rises, the lower mold holder 19 is guided by the guide posts 31R, 31L and moves up and down against the urging force of the springs 33R, 33L. In cooperation with the die 27, the workpiece is bent.

In this way, the bending die set type mold 17
3 and the upper mold 27 are integrally held via the guide post 31R131L, and the centering of the lower mold 23 and the upper mold 27 has been performed in advance, so the centering work is performed on the machine. Since it is not necessary, the bending process can be performed immediately.

Referring again to FIG. 1, an automatic mold changing device 35 is disposed adjacent to, for example, the right side of the press brake 1. That is, a box-shaped base 37, which is a part of the automatic mold changing device 35, is provided on the right side of the press brake 1, and a support table 39 is mounted on the base 37. On both sides of this support table 39, a plurality of guide rails 41 extending in the front-rear direction are provided at appropriate intervals.
is provided.

A mold storage rack 43 is provided above the support table 39 and stores a plurality of bending die set molds 17 at appropriate intervals in the front and back direction. A plurality of sliders 44 are attached at appropriate intervals. Moreover, this slider 44 is slidably fitted into the guide rail 41. Also,
A storage rack moving feed screw 45 extending in the front-rear direction is provided in the support table 39, and a nut member (not shown) screwed onto the storage rack moving feed screw 45 moves the mold storage rack. It is provided at the bottom of 43.

Further, a drive motor (not shown) such as a servo motor is provided on the rear side of the support table 39, and the drive motor is connected to the feed screw for moving the storage rack via a drive transmission member such as a pulley or a belt. 45 are interlocked and connected.

With the above configuration, when the drive motor is driven, the storage rack moving feed screw 45 is rotated via the drive transmission member. When the storage rack moving feed screw 45 is rotated, the mold storage rack 43 is guided by the guide rail 41 via the nut member and is moved in the front-rear direction.

Support frames 47R, 4 are provided on both sides of the support table 39 near the processing section C line in the press brake 1.
7L are installed vertically.

A support plate 49 is attached between the support frames 47R and 47L, and a mold exchange cylinder 51 as a mold moving device is provided on the front side of the support plate 49. Further, one end of a telescopic member 53 is attached to the upper part of this support plate 49, and a known chucking device 55 for mold replacement is already provided at the other end of this member 53. This mold exchange chucking device 55 is fixed to the tip of the piston rod in the mold exchange cylinder 51.

With the above configuration, a predetermined mold is selected from among the bending die set molds 17 stored at appropriate intervals in the front-rear direction of the mold storage rack 43, and the mold storage rack 43 is moved in the front-rear direction. , the selected predetermined mold is positioned on the processing section C line of the press brake 1.

Next, the mold exchange chucking device 5 is activated to chuck the positioned predetermined mold by the mold exchange chucking device 55. In this state, by operating the mold exchange cylinder 51, a predetermined mold is moved from right to left in FIG. 1 and positioned on the guide rail 13.

When positioned on the predetermined mold guide rail 13, when the mold exchange chucking device 55 is unclamped from the predetermined mold and returned to its original position, the mold fixing cylinder 15 is activated. As a result, a predetermined mold is fixed to the guide rail 13. The press brake 1 then performs the desired bending process on the workpiece.

When the desired bending process is completed on the workpiece and the mold is to be replaced, the mold fixing cylinder 15 is activated to release the predetermined mold from the guide rail 13, and the mold replacement chuck is activated. With the device 55 moving toward the press brake 1 and chucking a predetermined mold, the mold replacement chucking device 55 is returned to its original position, thereby moving the predetermined mold from the guide rail 13. The mold storage rack 43 is then stored in a vacant position. The mold exchange is completed by unclamping the mold exchange chucking device 55 from the predetermined mold.

In this way, using the bending die set type mold 17 in which the lower mold 23 and the upper mold 25 are set, the automatic mold changing device 35 containing the bending die set type mold 17 is pressed. By arranging it adjacent to the brake 1, the bending die set type mold 17 can be automatically moved between the processing section C of the press brake 1 and the mold storage rack 43 of the automatic mold changer 35. And it can be replaced in a short time.

Note that this invention is not limited to the embodiments described above, and can be implemented in other forms by making appropriate changes. For example, in this embodiment, the press brake 1 is used as an example of the bending machine, but other bending machines can also be used.

[Effects of the Invention] As can be understood from the above description of the embodiments, according to the present invention, the upper mold holder holding the upper mold and the lower mold holding the lower mold are connected by a guide post. The upper mold and lower mold are supported by a bending die set type mold that is centered in advance, so there is no need to perform centering work on the machine and it can be easily installed. .

In addition, by using a bending die set type mold and arranging an automatic mold exchange device adjacent to the bending machine, the processing section of the bending machine and the mold storage of the automatic mold exchange device are A mold moving device that selects a predetermined mold from a plurality of bending die set molds stored in a mold storage rack.

The chucking device for mold replacement allows a given mold to be replaced automatically and in a short time.

[Brief explanation of drawings]

FIG. 1 is a perspective view of a press brake equipped with an automatic mold changing device according to an embodiment of the present invention, and FIG. 2 is a front view of a bending die set type mold according to an embodiment of the present invention. 3 is a right side view of FIG. 2. 1... Press brake (bending machine) 11... Lower table 13... Guide rail 15... Mold fixing cylinder 17... Bending die set type mold 19... Lower mold holder 21.・・Upper mold holder 2
3...Lower mold 27...Upper mold 31R, 31L...Guide post 35...Mold automatic exchange device 43...Mold storage rack 51...Mold exchange cylinder (mold mobile device) 55...
・Chucking device agent for mold replacement Patent attorney 3
Kazu Yoshihide

Claims (2)

[Claims] (1) Hold the lower mold in the lower mold holder, hold the upper mold in the upper mold holder, support both sides of the upper mold holder and lower mold holder with guide posts, and hold the upper mold and lower mold. A die set type mold for bending, which is characterized by being made by integrating the. (2) An automatic mold changing device is installed adjacent to the bending machine and automatically replaces the bending die set type mold from the processing section of the bending machine. A mold storage rack that can be moved back and forth and which stores the bending die set type molds, and a plurality of bending die sets that can be moved back and forth in the processing line of the bending machine. Chucking the bending die set type mold in order to take the bending die set type mold into and out of the processing section of the bending machine while positioning the bending die set type mold selected from the folding die set type molds. a mold chucking device,
An automatic mold changing device comprising: a movable mold moving device that moves a bending die set mold in the left and right direction.