JP2549381Y2 - Box bending mold equipment - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a box-bending die apparatus used for box-bending a plate-like work.

[0002]

2. Description of the Related Art Conventionally, when a work is box-bent by a press brake and a mold c is pulled out of the work a, a part of the mold b and a flange portion b of the work a already bent may interfere. As shown in FIG.
Is provided at the end of the shaft with a swinging mold e supported by a pin d so as to be swingable up and down.
As disclosed in Japanese Unexamined Patent Application Publication No. 2-76612 and Japanese Unexamined Utility Model Application Publication No. 2-76612, a mold apparatus provided with a sliding die that slides in an oblique direction at the end of the mold is used.

[0003]

However, all of the above-mentioned conventional mold devices are of the swing type (or sliding type) when the workpiece is bent.
Is applied to the upper part of the side mold provided on both sides of the swing side, so the precision during processing is determined by the accuracy of the contact part between the swing mold and the side mold. Because of the demand, there is a problem that the mold apparatus becomes expensive.

When the side mold supporting the swing mold e is deformed due to the bending load, the swing mold e escapes upward as shown by the imaginary line in FIG. 8, so that the bending angle of this portion becomes large. There were also problems such as a variation in the bending angle with other parts and a decrease in processing accuracy. The present invention has been made for the purpose of improving the above-mentioned problems, and an object of the present invention is to provide a box bending die apparatus capable of performing accurate box bending processing.

[0005]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention provides a box bending machine in which an oscillating mold is provided at the end of a mold body for box bending a plate-like work so as to be vertically slidable. In the mold apparatus, the swing type is vertically adjusted between the end portion of the mold body and the upper surface of the swing type, and the swing type bent portion is previously formed with respect to the bent portion of the mold body. An adjustment means for presetting downward is provided.

[0006]

[Operation] The swing type is preset by considering the deformation of the mold body due to the bending load by the above configuration,
It is possible to perform high-precision bending without variation in the bending angle between the portion where the mold body is bent and the portion where the swinging die is bent.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described in detail with reference to the drawings shown in FIGS. In the figure, a plate-shaped mold body elongated in the left-right direction, and a bent portion 1a for bending a plate-shaped work 2 is formed at a lower portion in a straight line.
At both ends, a square notch 1c is formed leaving an upper side 1b.

The swing mold 3 is accommodated in these cutouts 1c. The swing mold 3 has one end fixed to the other end of a lever 5 pivotally supported on the mold main body 1 via a support shaft 4. From the position shown in FIG. FIG.
It can be rotated up and down in the range of the position shown in FIG. A notch 1c of the mold body 1 is provided below the swing mold 3.
The folded portion 1a of the mold body 1 when housed inside
The bent portion 3a is formed so as to be substantially in line with the outer end of the bent portion 3a. The other end side of 2 can be bent.

The vertical side 1d of the notch 1c formed at both ends of the mold body 1 has a lower end formed in an arc shape centering on the support shaft 4, so that the swing mold 3 swings smoothly. The grooves 1e and 3 are formed on the front surface of the mold body 1 near the vertical side 1d and the front surface of the swing mold 3, respectively.
b is formed, and one side of the steady plate 6 is fixed in the concave groove 1f on the mold body 1 side. The other side of the steady plate 6 is inserted into the groove 3b of the swing mold 3 as shown in FIG.
As shown in FIG. 5, the swing mold 3 is adapted to perform steadying when the swing mold 3 swings up and down. In the figure, reference numeral 7 denotes a stopper pin implanted at a substantially intermediate portion of the lever 5, the tip of which is fitted into an arc-shaped long groove 1 e centered on the support shaft 4 formed on the mold body 1 and swings. The downward swing range of the movable mold 3 is regulated.

On the other hand, reference numeral 8 in the figure denotes an adjusting mechanism. Below the upper side 1b provided at both ends of the mold body 1, there is formed a tapered groove 8a which becomes lower toward the center of the mold body 1 at the other end. The wedge-shaped adjusting member 8b is accommodated in the tapered groove 8a so as to be swingable toward the center of the mold body 1.

The adjusting member 8b has a long hole 8c in the moving direction.
The adjusting member 8b is movably mounted in the tapered groove 8a by a set screw 8d inserted from below into the elongated hole 8c, and one end of the adjusting screw 8e is provided at the tip of the upper side 1b. The other end of the adjusting screw 8e is screwed to the end of the adjusting member 8b. 8f is a lock nut for fixing the adjustment member 8b at the adjustment position. Although the drawing shows only the left end side of the mold body 1, a similar swing mold 3 is provided on the right end side of the mold body 1.

Next, the operation will be described. When the plate-shaped work 2 is box-bent as shown in FIG. 5, the swinging dies 3 provided at both ends of the mold body 1 have bent portions 3a. Since it is projected outward and is easily deformed, the swing mold 3 is adjusted in consideration of this deformation. That is, the lock nut 8f is warmed, the adjustment screw 8e is rotated, and the adjustment member 8b is moved and adjusted along the tapered groove 8a toward the center of the mold body 1. As a result, the swing mold 3 is pushed down to the position shown by the solid line in FIG.

That is, when both ends of the mold body 1 are deformed by the bending load, the bent portion 1a of the mold body 1 and the swing mold 3
Of the mold body 1 in advance so that the bent portion 3a of the
Of the swing mold 3 is preset downward by δ from the bent portion 1a. Since the preset amount δ varies depending on the thickness, material, and the like of the work 2 to be bent, the work 2 is trial-bent in advance to detect an optimum value, and is adjusted in accordance with the optimum value.

After the swing mold 3 is preset as described above, box bending is started in the same manner as in the prior art. When the long side 2b is bent, the short side 2c and the flange 2 have already been bent.
Even if a is bent, the swing mold 3 rotates to the position shown in FIG.
Does not interfere with the flange portion 2a, and the die body 1 can be extracted from the inside of the work 2 after the box bending process is completed.

[0015]

[Effects of the Invention] As described above in detail, the present invention allows the swing type to be preset in consideration of the deformation of the mold body due to the bending load. By adjusting the preset amount so that the bent part and the oscillating type bending part are in a straight line, there is no variation in the bending angle between the part where the mold body is bent and the part where the oscillating type is bent High-precision bending becomes possible.

In addition, since the positions of the mold body and the swing mold can be adjusted after the mold is manufactured, the precision of the swing mold support portion is not required so much at the manufacturing stage, which facilitates the manufacture of the mold. Even if both ends of the mold body are permanently deformed during long-term use, they can be used continuously by adjustment work.
Mold life is also improved.

[Brief description of the drawings]

FIG. 1 is a partially cutaway front view of a mold apparatus according to an embodiment of the present invention.

FIG. 2 is a front view of a state in which the swing type swings downward.

FIG. 3 is a view from arrow A in FIG. 1;

FIG. 4 is a sectional view taken along line BB of FIG. 1;

FIG. 5 is a sectional view taken along line CC of FIG. 1;

FIG. 6 is an operation explanatory view at the time of presetting a swing mold.

FIG. 7 is a perspective view of a box-bent work.

FIG. 8 is an explanatory view of a conventional mold apparatus.

[Explanation of symbols]

1 Mold main body, 1a bent portion, 2 work, 3 swing type, 3a bent portion, 8b adjusting member, 8e adjusting screw.

Claims (2)

(57) [Scope of request for utility model registration] 1. A box bending die apparatus in which a swinging die 3 is vertically slidably provided at an end of a die body 1 for bending a plate-shaped workpiece 2 into a box. Adjusting the swing mold 3 up and down between the part and the upper surface of the swing mold 3 so that the bent part 3a of the swing mold 3 is preset in advance downward with respect to the bent part 1a of the mold body 1. A box bending mold device provided with means. 2. A wedge-shaped adjusting member 8b slidably accommodated in a tapered groove 8a formed at an end of the mold body 1, and an adjusting screw for moving and adjusting the adjusting member 8b. The mold apparatus according to claim 1, wherein the mold apparatus comprises 8e.