JPH0233935Y2 - - Google Patents

Description

[Detailed description of the invention] <Industrial application field> The disclosed technology is a one-shot forming technique in which the edge of a workpiece, in which a single metal plate has a vertical flange at the edge, is punched and formed and simultaneously bent. belongs to the field of

Therefore, this invention provides a curved blade for punching and bending the edge of a workpiece having the above-mentioned edge flange on either the upper die attached to the ram or the lower die attached to the bolster. This invention relates to a press die bending device that is equipped with a press die and a bending blade that corresponds to the other die, and in particular,
One die is provided with a curved blade having a bending surface for the workpiece, a punch on both sides thereof, and a punching blade having an inclined blade surface for vertical punching, and a pad for clamping the workpiece together with the punch and a pad for clamping the workpiece on both sides thereof. In the case where the cutting blade is provided on the other mold, and the punching blade is provided on the lower mold, the punch and pad are supported by the lower mold and the upper mold via the bullet, and the punching blade is provided on the upper mold. In this embodiment, the invention relates to a press die bending device in which a pad is fixed to a lower die.

<Prior Art> As is well known, many industrial products use molded products from metal panels, and a considerable number of these products are complex molded products having punched and bent portions.

For example, as shown in FIG. 1, in the case where a metal panel workpiece 1 has a vertical flange 3 on the edge 2, an L-shaped cross-sectional portion 4 shown by an imaginary line is cut and removed, and further, Products in which the punched long side 6 of the punched surface 5 is bent upward to form a three-dimensional bent part 7, and as shown in FIG. There is also a product in which a cut-out part 4' is formed and an upwardly bent part 7' is formed at the rear thereof.

By the way, when punching and bending a workpiece as shown in FIG. 1, for example, the punching surface 5 of the flange part 2 of the punching forming part 4 is cut vertically, so punching and bending are performed, and then It was common practice to perform bending work.

<Problem that the invention seeks to solve> Therefore, there is a drawback that one-shot molding is not possible.
There are disadvantages such as increased man-hours, poor line cycle efficiency, the need for at least two devices, high costs, the disadvantage of requiring a large space, and the work being moved in two stages. Since the molding process is reset after the molding process has been completed, there are disadvantages in that the molding accuracy decreases and variations occur.

To deal with this, for example, it may be possible to provide a cutting blade and a curved blade in the lower die, and to provide a cutting blade in the upper die for molding, but in reality, the in-mold link of the cutting blade The complexity of providing the mechanism etc. led to the impossibility of practical use.

<Purpose of the invention> The purpose of this invention is to solve the technical problem of punching and bending metal panel work that involves punching and bending based on the above-mentioned conventional technology, and to solve the problem of punching and bending in one stroke of the upper and lower dies. It is an object of the present invention to provide an excellent press mold bending device which can perform the subsequent bending in one pass and is useful in the field of forming processing technology in the machine manufacturing industry.

<Means/effects for solving the problems> In order to solve the above-mentioned problems, the structure of this invention, which is based on the above-mentioned claims for utility model registration, is to provide a flange on one of the upper mold and the lower mold. A press-type bending device is provided with a punching blade and a bending blade for punching and bending an edge including a flange portion of a metal panel having a shape, and a punching blade is provided on the other side, and the punching blade is provided with a punching blade on the other side. A curved blade having a forming surface is provided, a punch and a punching blade having an inclined blade surface are provided on the side of the curved blade, and a cutting blade having a bending forming surface is provided opposite to the curved blade on the other die; A pad facing the punch is provided on the side of the extraction blade, and a supporting bullet is interposed between the punch and the pad, or between the punch and the mold, and between the pad and the mold. This is a press-type bending device.

<Function> Then, in the process of placing the workpiece on the punch provided in the lower die and lowering the upper die, the pad of the upper die first clamps the workpiece together with the punch, and
Next, the bullet is compressed against the pad, and the attached punching blade comes into contact with the workpiece, compressing the bullet between the punch and the lower die, and first, the inclined blade surface of the punching blade of the lower die presses against the workpiece. The punch contacts the vertical flange of the bullet to form a cutting slit, and as the pressing continues, the punching blade cooperates with the cutting blade to pull out the punching part, and as the pressing continues, the punch compresses the bullet. The upper mold cutting blade makes the workpiece come into contact with the lower mold bending blade, and bending is performed by the bending surfaces of both of them.Also, when the punch and punching blade are installed on the upper mold, the workpiece is brought into contact with the lower mold pad. has developed a technical means that eliminates the need to insert a bullet between the lower mold and allows punching and bending to be performed in one molding process, improving accuracy, improving efficiency, and reducing costs. This is what I learned.

<Embodiment> Next, an embodiment of this invention will be described below with reference to FIGS. 1 and 2 and the drawings from FIG. 3 onwards.

In the embodiment shown in FIGS. 3 to 5, reference numeral 8 is a press mold bending device which constitutes the gist of this invention, and the illustrated embodiment is a mode for punching and bending the metal panel workpiece 1 shown in FIG. A curved blade 11 having a bending surface 10 with a set inclination angle formed on the upper surface is fixed to the lower die 9 connected to a bolster (not shown) by appropriate means such as bolts, and an edge 12 is formed at the upper end. The curved blade 11 has a cutting surface 13 of an inclined surface blade for vertical cutting with a set inclination angle θ with respect to the vertical plane, and a cutting surface 19 having an edge with a predetermined inclination angle following the edge 12. A punching blade 14 with a higher height H is also provided on the lower mold 9 in a predetermined position alongside the curved blade 11, and furthermore, on the other side of the curved blade 11, a bullet with a set spring constant K is provided. A predetermined stroke S for positioning the workpiece 1 through its shape before lowering the ram (not shown) through the elastic force screw 15.
A punch 16 is provided.

On the other hand, an upper mold 1 fixed to a ram (not shown)
7 has a bending surface 10' having the same inclination angle as the bending surface 10 of the curved blade 11 in plan view.
A shaped punching blade 18 is fixed by appropriate means such as bolts, and its end face is formed with a punching surface 19' having a predetermined inclination angle and a horizontal punching surface 12' following this, and the punching surface 19 of the punching blade 14 is , 12, the punching process is carried out in a cooperative manner.

Further, at the end of the bending blade 18, there is a pad 20 which faces the punch 16 and is engaged with the upper die 17 via a side pin (not shown) and receives a reaction force during molding via a spring 21, which has a spring constant K'. It is supported by a spring 21 (K'<K) and operates with a stroke S'(S'<S).

In the above configuration, when the workpiece 2 shown in the imaginary line in FIG. 4 is placed on the punch 16 in an opened state and the bending device 8 is started, the upper mold 17 moves as shown in the arrow A in FIG. The lower surface of the pad 20, whose lower surface is naturally lower than the bending surface 10' of the punching blade 18, comes into contact with the workpiece 1 first, and the spring constant K' of the support spring 21 causes the punch 16 to Since the spring constant K of the support spring 15 is smaller than the spring constant K of the support spring 15, the workpiece 1 is clamped by the pad 20 and the punch 16, and further, when the upper die 17 is lowered by a stroke S' which is shorter than the stroke S of the punch 16,
The spring 21 is compressed, and the bending surface 1 of the bending blade 18
0' comes into contact with the workpiece 1 from above, and the workpiece 1 then begins to descend against the spring 15, so that the upper surface of the punching blade 14 enters into the flange portion 2 of the workpiece 1.

Therefore, the edge 12 on the side of the inclined blade surface 13 of the punching blade 14 first forms a cutting slit in the flange portion 4 of the workpiece 1, and the punching surface 5 shown in FIG. 1 is formed on the vertical surface of the flange 2. It will expand in this direction.

Subsequently, when the upper mold 17 further descends, the upper surface of the punching blade 14 comes into contact with the inner surface of the workpiece 1, and the punching blade 1
4 and the corresponding punching surfaces 12, 12' of the punching blade 18,
Subsequently, the scrap 4 for removing the flange portion is removed by means of 19 and 19' as shown in FIG. A predetermined bending portion 7 is formed at the edge by the bending surfaces 10, 10'.

Then, the upper mold 17 returns and rises, and the scrap 4
The product is taken out, the next work 2 is reset, and punching and bending is performed again.

Even if the upper die 17 and the lower die 9 in the above-mentioned embodiment are exchanged and the pressing direction is reversed, the same one-shot forming punching and bending process is performed, but in this embodiment, the pad 20 is The spring 21 becomes unnecessary.

Further, the embodiment shown in FIG. 6 has a curved blade 11 and an extraction blade 1.
8 is additionally provided with punching blades 14', 14'', thereby making the punching surface 5' as shown in FIG.
A flap-shaped bent portion 7' can be formed according to the length of the .

Of course, it is also possible to perform punching and bending as shown in FIG. 2 by attaching a punching blade, punching blade, or curved blade in a predetermined shape to a mold.

It goes without saying that the embodiments of this invention are not limited to the above-mentioned embodiments; for example, various embodiments can be adopted, such as providing a spring opposite the cutting blade.

<Effects of the invention> As described above, according to this invention, basically the punching process of a metal panel having a flange part and the bending process of the adjacent part can be performed in one action using one die cutting device. Since it can be done in one molding, only one process is required, which is extremely efficient, punching and bending can be done with one machine, it occupies a small space, and the molding process is short in terms of time. This has the excellent effect of shortening the mass production cycle and reducing costs.

In addition, since the workpiece is clamped in the same die-cutting device and has a fixed starting force during both punching and bending, the accuracy of the forming part is maintained as designed, resulting in good product accuracy and no defects. This has the effect of not producing good quality products.

Therefore, one mold is provided with a cutting blade having a curved blade and a punch and a punching surface having an inclined blade surface on the side thereof,
By providing a punching blade and a pad on the side of the other mold, the pad and punch clamp the workpiece, and the punching blade and punching blade cut a vertical slit in the flange to form a punched surface. Moreover, it has the effect that the scraps that are removed can be removed continuously.

Furthermore, since a cutting surface with an inclined cutting surface is formed on the cutting blade, the workpiece flange can be cut vertically even though the process is a linear process of upper and lower dies, and press forming on a curved surface can be performed with a curved blade. It has the effect of being performed with a bent blade.

Further, since the cutting blade can have a bending surface and a cutting surface corresponding to the cutting surface of the cutting blade, there is an excellent effect that cutting and bending are performed continuously.

In addition, by having a bullet interposed in at least the punch and the pad so that it is supported by the mold, it is not only possible to clamp the workpiece elastically in cooperation with the pad at all times, but also to clamp the workpiece. Thus, in the clamped state, pressure for punching and bending can be smoothly and continuously performed.

Furthermore, by designing the bullet to be provided only on the punch side, punching and bending can be performed with the curved blade and punching blade side on the press side, thus increasing the degree of freedom in design. It's also effective.

[Brief explanation of the drawing]

Figures 1 and 2 are perspective views of parts of the workpiece for punching and bending, Figures 3 and below are explanatory diagrams of this invention;
4 is a side view of the punching process, FIG. 5 is a side view of the bending process, and FIG. 6 is a corresponding perspective view of the curved blade and punching blade of another embodiment. FIG. 7 is a partial perspective view of the processed workpiece. 1, 2...metal panel, 3...flange, 2'
...Flange part, 17...Upper mold, 9...Lower mold, 1
...Workpiece, 14...Bunching blade, 11...Curved blade, 18
...Bending blade, 8...Press type bending device, 10...
Bending surface, 16... Punch, 13... Inclined blade surface, 10'... Bending forming surface, 20... Pad, 1
5... Bullet machine.

Claims (1)

[Scope of utility model registration request] In a press-type bending device in which one of the upper die and the lower die is provided with a cutting blade and a bending blade for cutting and bending the edge including the flange of a metal panel having a flange, and the other is provided with a cutting blade. A curved blade having a bending surface is provided on one of the molds, and a punch and a punching blade having an inclined blade surface are provided on the side of the curved blade, and the other mold has a bending surface opposite to the curved blade. A pad is provided on the side of the punch, which faces the punch, and a support bullet is provided between the punch and the pad, or between the punch and the mold, and between the pad and the mold. A press-type bending device characterized by having a machine inserted therein.