JPH0530812Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to an upper die attachment/detachment device for a bending machine such as a wing bender, a press brake, or a coki bender, and a folding die for the upper die used in the device.

(Prior Art) A conventional upper die attachment/detachment device for a folding machine and a blade for an upper die used in said device are, as shown in FIG.
1, a blade 04 that is detachably attached to an attachment recess 06 formed in the front of the mold body 03, and a pressing plate 08 that presses the blade 04 from the front to prevent it from slipping out.
The press plate 08 is held at its middle by a bolt 014 which is screwed into the die body 03 from the front, and is fastened by abutting its upper part against the die body 03 and its lower part against the front face of the blade die 04.

(Problems to be Solved by the Invention) It is necessary to change the size of the blade 04 depending on the product to be processed, but in the conventional structure, the following procedure is required to replace the blade.

That is, the bolt 014 is loosened longer than the front-to-back length of the support step 07, which is integrally provided below the mounting recess 06 of the mold body 03, and the push plate 08 is similarly set longer than the front-to-back length of the support step 07. Move the blade mold 04 forward for a long time so that the back side of the blade mold 04 is
Pull it forward so that it is located in front of the front surface of the blade, and then pull it down further to remove it. Next, move the desired blade mold up from below to position it in front of the mounting recess 06, and then move it backward. The blade is moved and pushed into the recess 06, and then the push plate 08 is applied from the front side, and then the push plate 08 is brought into contact with the blade die 04 by tightening the bolt.

The above steps are used to replace the desired blade type, and the replacement process requires a lot of effort.
The drawback was that it was time consuming and increased the risk.

The present invention has been devised in view of the above-mentioned shortcomings of the prior art, and includes an upper die attachment/detachment device for a bending machine that allows the blade die to be easily attached and detached in a short time, and an upper die attachment/detachment device used in the device. The purpose is to provide a type.

(Means for Solving the Problems) In order to achieve the above object, the upper mold attachment/detachment device of the bending machine of the present invention has a mold body 3 and a mounting recess 6 formed at the lower front surface thereof. An upper mold 2 comprising a folding mold 4 that is slidable in the direction and inserted and removed.
and a push plate 8 which is provided on the front side of the mold body 3 at an appropriate distance from each other and prevents the blade mold 4 from coming out of the mounting recess 6 by pressing the front surface of the blade mold 4. , a forced drive device 10 that controls the pressing and releasing of the pressing plate 8 against the blade 4.
and push plate escape grooves 18, which are formed in the same number as the push plates 8 and penetrating the mold 4 at the front and rear thereof,
The groove width of the pushing plate relief groove 18 is formed to be slightly longer than the width of the pushing plate 8, and the pushing plate relief groove 18 is formed so that the pushing plate relief groove 18 is formed so that the pushing plate escape groove 18 is formed so as to be slightly longer than the width of the pushing plate 8. The groove width center line _Y1 of the relief groove 18 is formed to be offset from the width center line Y of the push plate 8 by at least one-half width of the push plate 8.

It is preferable that the upper mold body 3 incorporates a forced drive device 10 using fluid pressure to move the push plate 8 provided on the front side back and forth.

Further, for the purpose of facilitating the fitting of the blade mold 4 into the mounting recess 6, a recessed portion 24 is formed in series with the opening 18B on the front side of the blade mold main body of the push plate escape groove 18,
It is also possible to adopt a blade shape in which either the left or right side surface 24B of the recessed portion 24 serves as the reference surface 19.

(Function) To attach and detach the upper die with the upper die attachment/detachment device of the bending machine configured as described above, the forced drive device 10 is activated to release the pressing force of the push plate 8 against the blade die 4, If you slide the blade mold 4 to the right or left so that it overlaps the back of the push plate relief groove 18, and then pull out the blade mold 4 forward while maintaining the same position, the push plate 8 will form the relief groove that passes through this front and back. By simply passing through the inside of the blade 18, the blade mold 4 moves forward without being obstructed by the push plate 8 and leaves the mounting recess 6.
Then, the mounting is performed by performing the reverse operation.
In this way, the blade mold 4 is attached and detached by moving only in two directions, left and right and front and back, along the horizontal plane.

The operation of the push plate 8 using fluid pressure is quick and smooth.

Also, the side surface 24A of the recessed portion 24 provided in series with the front opening 18B of the push plate escape groove 18 is the reference surface 19.
The blade mold 4 has a positioning function when fitting the blade mold 4 into the mounting recess 6 of the mold body 3, and facilitates the work of attaching and removing the blade mold 4.

(Example) Next, an example in which the present invention is applied to a wing bender (folding machine) will be described with reference to the drawings.

In Figures 1 and 2 and Figures 4 and 5, 1 is a ram, 2 is an upper mold attached to the lower end of this ram 1, and this upper mold is connected to a mold body 3 attached to the lower end of ram 1 and this mold. It consists of a blade mold 4 that is detachably attached to the front part of the main body 3. Specifically, as shown in the figure, a mounting recess 6 is formed in the front lower half of the mold body 3 with the front and lower sides open and having a front and rear width sufficient to accommodate the blade mold main body 5. A support step 7 is formed at the lower end of the support member 6 and projects forward.

Reference numeral 8 denotes a push plate for fixing the blade mold 4 to the mounting recess 6, and a plurality of push plates are provided at predetermined intervals in the left-right direction of the mold body 3. The push plate 8 is formed into a U-shaped cross section with its upper and lower ends protruding rearward, respectively, and the upper and lower protruding pieces 9 are attached to the front surface of the mold body 3 upwardly and downwardly. are in contact with the front surface of the blade mold 4, respectively.

Reference numeral 10 denotes a drive device using fluid pressure (hydraulic pressure is used in this embodiment) that moves the push plate 8 back and forth to press (tighten) and release the pressure on the blade 4. Specifically, A recessed hole 11 of an appropriate depth is bored from the back side of the mold body 3 toward the front, and serves as a cylinder chamber.
A through hole 12 with a diameter smaller than 1 is bored, and a piston 13 is installed in the recessed hole 11, and a piston 1 is installed in the through hole 12.
The piston rod 14 is integrally protruded forward from the through hole 12, and has a front end projected forward from the through hole 12, through which the piston rod 14 is inserted. Further, the rear opening of the recessed hole 11 is closed by a closing member 16 having a connection port 15 for a fluid pressure pipe (not shown). The push plate 8 is fixedly connected to the front end of the piston rod 14, and a compression coil spring 17 is provided in the recessed hole 11 between the front wall 11A of the recessed hole 11 and the piston 13 so as to surround the circumference of the piston rod 14. Loaded, front wall 11A
The piston 13 is constantly pressed backward against the piston 13.

As shown in FIGS. 2 and 3, reference numeral 18 denotes push plate relief grooves provided at predetermined intervals in the left-right direction of the blade body 5, and penetrating through the upper surface 51 of the blade body 5 in the front-rear direction. The horizontal width is slightly longer than that of the push plate 8, and the vertical dimensions are set such that the groove bottom surface 18A is slightly lower than the lower end level of the push plate 8. Furthermore, the same number of push plate escape grooves 18 as the push plates 8 are provided. The position is such that the groove width center line Y ₁ of the push plate release groove 18 is offset to either the left or right side (to the left in the illustrated example) of the left-right width center line Y of the push plate 8. They are arranged to have a relative positional relationship, and the amount of deviation is set to be in the range from more than half to twice the horizontal width of the push plate 8 (preferably 1.0 to 1.5 times). .

The push plate relief groove 18 is deviated to the left in the illustrated example because, in this example, the positioning of the blade 4 is carried out by abutting the left end of the blade main body 5 against a reference surface 19, which will be described later. This is because it is used as a reference when setting the blade type, and when the right end is used as a reference, it is sufficient to deviate it to the right.

The reference surface 19 is formed as follows. That is, as shown in FIG. 4, a U-shaped stopper member 21 having a recess 20 corresponding to the longitudinal width of the mold body 3 is placed at the left end of the mold main body 3 in a shape that just closes the open left end of the mounting recess 6. Then, the recess 20 is fitted into the mold body 3 and installed, and this stopper member 21 is
The surface facing the mounting recess 6 is defined as a reference surface 19.

Next, the configuration of the blade 4 used in the present invention, as shown in FIGS. 2 and 3, consists of a blade main body 5 and a blade 5A that is integrally connected to the lower part of the blade main body 5. Although it is formed to have the same dimensions as the left and right width of the mold body 3,
The blade 5A is formed to have a predetermined size depending on the size of the workpiece (for example, L, L ₁ , L ₂ in the figure),
The structure is such that the blade molds 4 having different blade body dimensions are appropriately selected according to the dimensions of the workpiece and are attached to and removed from the mold body 3.

Next, to explain the operation of the structure of the above embodiment, the workpiece W fed into the lower mold 22 and the wing mold 23 is lowered by lowering the ram 1, and the lower surface of the blade 5A and the upper surface of the lower mold 22 are The workpiece W is held down between the two parts, and then the wing die 23 is rotated to bend the workpiece W. If the width of the workpiece W varies depending on the workpiece, the upper die is adjusted accordingly. The width will change. This attachment/desorption operation is performed as follows.

First, the fluid pressure drive device 10 is operated from the installed state shown in FIG. In other words, fluid is forced to the rear side of the piston 13 in the recessed hole 11 from the connection port 15 of the closing member 16, and the piston 13 is moved forward against the compression coil spring 17. As a result, the piston rod 14 moves forward in the through hole 12 and moves the push plate 8 attached to the front side forward.
The upper and lower protruding pieces 9, 9 are connected to the mold body 3 and the blade mold 4, respectively.
[Figure 5 B].

This distance may be such that a substantial gap is created between the rear ends of the projecting pieces 9, 9, the mold body 3, and the blade mold 4, as shown in FIGS. 5A and 5C, or ,
Even if they are in actual contact, it is sufficient that the pressing force of the press plate 8 against the die body 3 and the blade die 4 is substantially eliminated. In any case, it is sufficient to allow the blade die 4 to slide to the left or right. Therefore,
The moving time and moving distance of the push plate 8 is very short.

Next, the blade die 4 is moved a little to the right as it is, so that each push plate relief groove 18 overlaps with the rear of the push plate 8 (FIGS. 5B and 5H).

If the blade die 4 is then pulled forward, the push plate 8 will pass through the push plate release groove 18 from the front to the rear as the blade die 4 moves, allowing the blade die 4 to move. Figure 5 halo].

Furthermore, pull out the blade mold 4 until the rear surface is located in front of the front surface of the push plate 8 [FIG. 5 HA-HA],
Finally, place it on a storage shelf (not shown) as appropriate.

Next, another blade mold 4 having a blade body 5A of a desired length
To set the cutter, simply follow the procedure in reverse. First, place another blade die 4 in front of the die body 3 in such a way that its pusher plate relief groove 18 overlaps the front of the pusher plate 8. position. Next, if the blade die 4 is moved backward as it is, the push plate 8 will move as the blade die 4 moves.
Since the blade passes through the relief groove 18 from the rear to the front, the blade die 4 is allowed to move. After moving the blade mold 4 backward to completely accommodate the blade mold main body 5 in the mounting recess 6, move the blade mold 4 to the left in the figure, and move the blade mold 4 to the stopper where the left end of the blade mold main body 5 becomes the reference surface 19. It is moved until it comes into contact with the member 21. By this contact, the proper mounting position of the blade die 4 is determined, and the predetermined mutual positional relationship of the push plate 8 and the push plate escape groove 18 is also determined. Next, the fluid flow path of the fluid pressure drive device 10 is switched, and the fluid press-fitted into the rear side of the piston 13 of the recessed hole 11 is pushed out of the recessed hole 11 through the connection port 15 by the elastic force of the compression coil spring 17. At the same time, the piston 13 is moved rearward, the piston rod 14 is retired, and the push plate 8 is pressed against the front surface of the mold body 3 and the blade mold 4. This completes the installation of another blade mold 4.

Next, FIG. 6 shows another means for forming the reference surface 19, which utilizes the side surface of a recess formed in the front surface 51 of the blade body 5 and uses this as the reference surface. is as follows.

That is, the vertical dimension of the push plate relief groove 18 corresponding to one of the plurality of push plates 8 is on the side of the front opening 18B of the blade body.
8, and the horizontal width is about 1.5 to 3 times, preferably 2.2 times, that of this push plate relief groove 18. is provided so that it is flush with the rising wall 18B ₁ on either the left or right side of the opening 18B, and the other side surface 2 of the recessed portion 24
4B is formed on the reference surface 19. The push plate 8 is set by pushing the lower projecting piece 9 into the recessed part 24, and by bringing the other side surface 24B into contact with the side surface of the projecting piece 9, the mold body of the blade mold 4 is pressed. 3, positioning is performed during installation. In this embodiment, the pushing plate 8 used in correspondence with the recessed portion 24 may be one in which the lower protruding piece 9 protrudes a little longer than those in other parts.

(Effects of the invention) Since the present invention is configured as described above, it produces the following effects.

The blade mold can be attached and detached by movement in only two directions: a slight left and right movement along the horizontal plane and a back and forth movement, and in addition, the push plate is operated by forced driving force. Compared to the conventional method, the blade mold can be attached and detached much more easily and quickly, and there is also the advantage of increased safety.

By adopting a mold body that integrates a hydraulic cylinder for operating the push plate, the push plate can press and release the pressure on the blade mold more quickly and smoothly, reducing the time required to attach and remove the blade mold. In addition to being able to further shorten the mold body, the mold body can be organized more neatly and more compactly than in the case where the forced drive device is attached externally.

Adopts a blade shape that uses either the left or right side of the recess, which is provided in line with the front opening of the push plate relief groove, as the reference surface for positioning when installing the blade into the recess. By doing so, the positioning operation at the time of attachment can be performed easily and with a simple operation, the attachment and detachment operation can be done easily and in a short time, and at the same time, the blade type main body and the blade body can be formed with the same size.

[Brief explanation of drawings]

Figure 1 is a partially cutaway side view of the main part, Figure 2 is its front view, Figure 3 is a perspective view of the blade, Figure 4 is a partially cutaway plan view showing the structure of the reference surface, and Figure 4 is a partially cutaway side view of the main part. 5A to 5C are explanatory diagrams of the operation, FIG. 6 is an enlarged perspective view of the main part showing a modification of the blade type, and FIG. 7 is an explanatory diagram of the conventional structure. Code explanation, 1... upper mold, 3... mold body, 4...
Blade shape, 5...Blade shape body, 5A...Blade body, 6...Mounting recess, 7...Support step, 8...Press plate, 9...
... Projection piece, 10 ... Forced drive device, 11 ... Recessed hole, 12 ... Through hole, 13 ... Piston, 14 ...
... Piston rod, 15 ... Connection port, 16 ... Closing member, 17 ... Compression coil spring, 18 ... Push plate relief groove, 18A ... Bottom surface of push plate relief groove, 18
B...Front side opening, 18B ₁ ...One rising wall, 19...Reference surface, 20...Recess, 21...Stopper member, 24...Recessed part, 24A...One side, 24B... The other side, Y...center line of the left and right width of the push plate, _Y1 ...center line of the groove width of the relief groove of the push plate, W...work.

Claims (1)

[Claims for Utility Model Registration] (1) A top comprising a mold body 3 and a mold 4 that is slidably inserted into and removed from the mounting recess 6 formed at the lower front surface of the mold body 3 in the length direction of the mold body 3. A push plate is provided on the front side of the mold 2 and the mold body 3 at an appropriate distance from each other and prevents the mold 4 from coming out of the mounting recess 6 by pressing the front surface of the mold 4. 8, and a forced drive device 10 that controls the pressing and releasing of the pressing plates 8 against the folding mold 4.
and push plate relief grooves 18, which are formed in the same number as the push plates 8 and penetrating through the mold 4 at the front and rear thereof, and the groove width of the press plate relief grooves 18 is set to be wider than the width of the press plate 8. The push plate relief groove 18 is formed long, and when the mold 4 is installed in the fixed position of the mold body 3, the groove width center line _Y1 of the push plate relief groove 18 is aligned with the width center line of the push plate 8. An upper die attachment/detachment device for a bending machine, which is formed to deviate from Y by at least one-half width of the push plate 8 or more. (2) A small-diameter through hole 12 is connected to the front wall 11A of a recessed hole 11 of an appropriate depth, which is bored from the back toward the front, and a piston 13 is inserted into the recessed hole.
A piston rod 14 is inserted into the piston rod 2 with its front end protruding forward, and a push plate 8 is fixed to the front end of the piston rod 14, and the rear opening of the recessed hole 11 has a closing member 16 having a connection port 15 for fluid pressure piping. 2. The upper die attachment/detachment device for a bending machine according to claim 1, further comprising a compression coil spring (17) installed between the front wall (11A) and the piston (13) within the concave hole (11). (3) Opening port 1 on the front side of the foldable body of the push plate relief groove 18
8B, the vertical dimension is the same as the vertical depth of this push plate relief groove 18, and the horizontal width is the same as this push plate relief groove 1.
Recessed part 2 set to about 1.5 to 3 times the size of 8.
4 is provided so that one of its left and right side surfaces 24A is flush with one of the left and right rising walls _18B1 of the opening 18B, and the other side surface 24B of this recessed portion 24 is provided as a reference surface 19.
The upper die for the upper die attachment/detachment device of the bending machine is formed in the above.