JP3495335B2 - Mold support device - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mold holding device, and more particularly to a mold supporting device used in a bending machine such as a press brake.

[0002]

[Prior art]

Conventionally, press brakes (FIGS. 4 and 5)
As is well known, when the work W is bent, a die including a punch P and a die D is used, and the lengths in the longitudinal direction (X-axis direction) are compared with each other. There are standard dies that are relatively large (for example, 835 mm) and split dies that are relatively small (for example, 10 mm).

Of these, the split molds (FIGS. 6 to 8) are used when bending the sash product S as described below.

That is, when the sash product S shown in FIGS. 6A and 6B is bent by the punch P and the die D,
As shown in the figure, most of the bending process of the sash product S is 9
Bending is 0 °.

Therefore, a large number of flanges are formed on the sash product S, for example, a flange F1 may be formed on the front side (FIG. 7), or flanges F2 and F3 may be formed on the left and right sides (FIG. 8). is there.

However, when the sash product S having many flanges is bent as described above, if the die forming the normal standard die is used, the flange F1 is (FIG. 7).
Bending may not be possible due to interference with the base 80 or the flanges F2 and F3 (FIG. 8) with the die.

For this reason, the die D2, which is a divided die having a height (in the Z-axis direction) larger and a length (in the X-axis direction) smaller than that of the standard die, is used (FIGS. 7 and 8). .

[0009]

[Problems to be Solved by the Invention]

However, since the split mold D2 as described above has a large height and a small length, the position in the X-axis direction may shift during processing as compared with the standard mold, Since it is simply inserted into the groove of the holder body, backlash is generated in the Y-axis direction. Therefore, a special fixing means is provided than in the past. In this regard, in the case of the standard mold, there is lateral bending in the longitudinal direction (X-axis direction) due to production, and the split mold D
Less misalignment and rattling compared to 2.

As means for fixing the split mold D2, for example, as shown in FIG. 9 (A), a means for fixing both sides of the split mold D2 with dedicated jigs 70, and FIG. 10 (A). As shown, there is a means for fixing the split mold D2 with the fastening plate 80.

Of these, the fixing means shown in FIG. 9 (A) has a groove 7 formed in a holder main body 74 fixed to a base 75 with a bolt 76.
4A is formed, the split mold D2 is inserted into this groove 74A,
Both sides are fixed by a special jig 70.

In this case, the dedicated jig 70 (see FIG.
(B)), which is composed of a bolt 71, an upper wedge 72, and a lower wedge 73.

With this structure, when the bolt 71 is tightened, the upper wedge 72 descends diagonally to the lower left with respect to the lower wedge 73, and the width (in the Y-axis direction) of the groove 74A becomes large. Insert the split mold D2.

In this state, if the bolt 71 is loosened this time, the upper wedge 72 rises diagonally to the upper right with respect to the lower wedge 73, and accordingly, the width of the groove 74A becomes narrower.
The split mold D2 that has been inserted into is fixed.

However, the fixing means shown in FIG. 9 is not preferable because the above-described dedicated jig 70 must be prepared and the above-described operation must be performed every time the divided mold D2 is fixed.
The fixing means shown in FIG. 9 is used in the front-back direction (Y
Rattling in the (axial direction) cannot be completely suppressed.

In the fixing means of FIG. 10A, a stepped portion 82A is formed on a holder main body 82 fixed to a base 83 with bolts 84, and a split mold D2 is inserted into the stepped portion 82A and the front thereof is inserted. Is fixed with a tightening plate 80.

In this case, the tightening plate 80 (see FIG.
(B)), it is attached to the front surface of the holder body 82 with bolts 81.

With this structure, when the bolt 81 is tightened, one side surface of the split mold D2 abuts on the vertical die abutting surface formed on the stepped portion 82A and faces the die abutting surface. The fastening plate 80 contacts the other side surface of the split mold D2,
As a result, the split mold D2 inserted in the stepped portion 82A of the holder body 82 is fixed.

However, the fixing means shown in FIG. 10 requires the bolts 81 to be tightened even in the case of a standard mold that does not need to be fixed, which increases the setup work before processing.

An object of the present invention is to provide a mold supporting device which does not require a dedicated jig and reduces the setup work, thereby improving the processing efficiency.

[0022]

In order to solve the above-mentioned problems, the present invention provides (A) die D as shown in FIGS.
A vertical die contact surface 4C that can freely contact one side surface DC of the die D is provided on the holder body 4 that supports the die D. Board 5
In the mold supporting device 9 attached to the holder body 4 via the fastener 6, (B) the flat portion 5C is provided on one side surface of the fastening plate 5, and the other side surface opposite to the one side surface is provided. A technical means called a mold supporting device 9 is provided, in which the protrusions 5A and 5B are provided and the fastening plate 5 is reversibly attached to the holder body 4.

According to the present invention, the common tightening plate 5 is used for the standard mold D1 (FIG. 3A) and the split mold D2 (FIG. 3B). , The dedicated jig 70 (FIG. 9) for the split mold D2 as in the conventional art is unnecessary,
Further, the fastening plate 5 having the flat portion 5C and the protruding portions 5A and 5B
In the case of the standard mold D1 (FIG. 3 (A)), since the flat part 5C is only directed to the holder body 4 side, the standard mold D1 is attached to the holder body 4 and the fastening plate. In the case of the split mold D2 (FIG. 3 (B)), the necessary tightening is performed by inserting the fastening plate 5 into the holder main body 4 by dividing it into plural parts (FIG. 2). Only the plate 5 needs to be inverted so that the projections 5A and 5B are directed to the holder body 4 side. Moreover, the through hole 5D for penetrating the fastener 6 provided in the tightening plate 5 (FIG. 1) is notched. If it is formed into a shape, the work of reversing the fastening plate 5 can be easily performed without removing the fastening tool 6, so that the setup work can be reduced and the working efficiency can be improved.

[0024]

BEST MODE FOR CARRYING OUT THE INVENTION The present invention will be described below with reference to the accompanying drawings by way of embodiments. FIG. 1 is a diagram showing an embodiment of the present invention.

The die supporting device 9 shown in FIG. 1 comprises a holder body 4 for supporting the die D and a fastening plate 5 on the front surface thereof.

In this case, the die D is the standard die D1.
(FIG. 3 (A)) or a split mold D2 (FIG. 3 (B)), and bends a work W (FIG. 5) in cooperation with a punch P (FIGS. 4 and 5) described later. .

The holder body 4 includes a bolt 7 and a nut 8.
Is fixed to the base 3, and the base 3 is attached to the lower table 2 described later.

Further, the holder main body 4 is integrally provided in the longitudinal direction (X-axis direction), and the holder main body 4 is similarly formed with a step portion 4A in the longitudinal direction.
The die D is placed.

A die contact surface 4C is provided vertically on the step portion 4A, and one side surface DC of the die D contacts the die contact surface 4C (see FIG. 3A). ), FIG. 3
(B)).

A shoulder portion 4B is formed on the front surface of the holder body 4 in parallel with the step portion 4A of the holder body 4.
A fastening plate 5 is placed on the shoulder portion 4B while being divided into a plurality of pieces in the longitudinal direction.

Each of the plurality of divided tightening plates 5 is reversibly attached to the holder body 4 via a fastener 6, for example, a bolt, and a flat portion 5C or projections 5A, 5B described later are attached to the holder body 4. When directed to the side, the fastening plate 5 faces the die contact surface 4C and contacts the other side surface DA of the die D (FIG. 3 (A) or FIG. 3).
(B)).

The flat portion 5C is provided on one side surface of each fastening plate 5, and the projections 5A, 5B are provided on the other side surface opposite to the one side surface of each fastening plate 5, respectively.

With this structure, when the flat portion 5C of the fastening plate 5 is directed to the main body 4 side (FIG. 3 (A)), as shown in FIG.
The flat portion 5C and the reference line K coincide with each other, so that the width (in the Y-axis direction) of the groove formed by the flat portion 5C and the step portion 4A is wide enough to insert the standard mold D1. Becomes

Therefore, only by inserting the standard mold D1 into this groove, the standard mold D1 is inserted between the flat portion 5C and the holder main body 4, and bending can be performed.

Further, the protrusions 5A, 5B of the fastening plate 5
Are provided at two positions above and below the bolt 6, the upper protrusion 5A is provided at a position contacting the die D, and the lower protrusion 5B is provided at a position contacting the holder body 4.

With this configuration, the protrusion 5A of the fastening plate 5,
5B toward the holder body 4 side (FIG. 3 (B)), both protrusions 5A and 5B coincide with the reference line K, and the upper protrusion 5A
And the width of the groove formed by the step portion 4A (in the Y-axis direction)
Has a width sufficient to insert the split mold D2.

Therefore, when the split mold D2 is inserted into this groove and then the bolt 6 is tightened, the split mold D2 is fixed by the upper projection 5A and the holder body 4 as shown in the drawing, and is bent. Is possible.

Further, each tightening plate 5 (FIG. 1) is provided with a through hole 5D through which the bolt 6 penetrates, and the through hole 5D.
Is formed in a notch shape.

With this configuration, the fastening plate 5 can be turned upside down and the protrusions 5A and 5B thereof can be directed to the holder body 4 side without removing the bolt 6 without removing the bolt 6 (FIG. 3B). ), Reversal work becomes easy.

The mold supporting device 9 having the above structure is applied to, for example, a press brake (FIGS. 4 and 5).

This press brake has side plates 30 on both sides of the machine body, and the upper table 1 is provided on the side plates 30.
Is attached to the upper table 1, and a punch P is attached to the upper table 1 via an intermediate plate 32 which constitutes a holder.

A lower table 2 is arranged below the side plate 30, and a die D is attached to the lower table 2 via a holder 9 composed of the main body 4 and the fastening plate 5 (FIGS. 1 to 3). The lower table 2 is mounted and is vertically moved by the hydraulic cylinders 34 on both sides thereof.

With this structure, after the NC device built in the operation panel 31 is started, the workpiece W (FIG. 5) is abutted and positioned on the abutment 33 arranged at the rear of the lower table 2, When the hydraulic cylinder 34 is operated and the lower table 2 is raised, the work W is subjected to a predetermined bending process in cooperation with the punch P and the die D.

The operation of the present invention having the above configuration will be described below.

(1) Operation when the die D is the standard die D1 (FIG. 3A).

In this case, as described above (see FIG.
(A)), the flat portion 5 of the fastening plate 5 facing the holder body 4 side
C coincides with the reference line K, and a groove sufficient for inserting the standard mold D1 is formed by the step portion 4A on the holder body 4 side and the flat portion 5C.

Therefore, by inserting the standard mold D1 into this groove, the standard mold D1 can be inserted into the flat portion 5C and the holder main body 4
It is inserted in between, which allows bending.

(2) Operation when the die D is the split mold D2 (FIG. 3 (B)).

In this case, the fastening plate 5 corresponding to the split mold D2 to be fixed is selected from the fastening plates 5 attached to the holder body 4 in a divided manner (FIG. 2).

Then, the tightening plate 5 selected (FIG. 1)
After loosening the bolt 6, when the fastening plate 5 is lifted up and the notch-shaped through hole 5D is separated from the bolt 6,
The fastening plate 5 is turned over and the protrusions 5A and 5B are attached to the holder body 4
If the protrusions 5A and 5B are attached toward the side through the bolts 6, the protrusions 5A and 5B coincide with the reference line K (FIG. 3B).

As a result, a groove sufficient for inserting the split mold D2 is formed by the upper protrusion 5A and the step 4A on the holder body 4 side.

In this state, if the split mold D2 is inserted into the groove and the bolt 6 is tightened, the split mold D2 is fixed by the upper protrusion 5A and the holder body 4, and the bending process becomes possible.

[0053]

As described above, according to the present invention, since the common tightening plate is used in the case of the standard mold and the case of the split mold, a dedicated jig for the split mold as in the conventional case is used. No tools are required, and the tightening plate having the flat part and the protruding part is attached so that it can be flipped over. Therefore, in the case of a standard mold, the flat part can be simply pointed toward the holder body side. It is inserted between the main body and the fastening plate, and in that case, by attaching the fastening plate by dividing it into multiple parts on the holder main body, in the case of a split mold, only the necessary fastening plate is inverted and its protrusion is All you have to do is to turn it toward the holder body side, and if the through holes for the fasteners that are provided in the fastening plate are formed in a notch shape, you can easily reverse the fastening plate without removing the fasteners. Therefore, it is possible to improve the processing efficiency by reducing the setup work. It became possible to achieve the technical effect of being able to.

[0054]

[Brief description of drawings]

FIG. 1 is an overall view showing an embodiment of the present invention.

FIG. 2 is a front view of FIG.

FIG. 3 is an explanatory view of the operation of the present invention.

FIG. 4 is a diagram showing an application example of the present invention.

FIG. 5 is a side view of FIG.

FIG. 6 is a diagram showing a processing example using a conventional split mold.

FIG. 7 is a diagram showing a relationship between a conventional split mold and a work.

FIG. 8 is a perspective view of FIG. 7.

FIG. 9 is a diagram illustrating a first conventional technique.

FIG. 10 is a diagram illustrating a second conventional technique.

[Explanation of symbols]

1 Upper table 2 Lower table 3 base 4 body 5 tightening plate 6 Tightening plate fixing bolts 7 Body fixing bolt 8 Body fixing nut 9 holder D die P punch

Claims (5)

(57) [Claims] 1. A tightening plate which is provided with a vertical die abutment surface capable of abutting on one side surface of the die on a holder body supporting the die, and which abuts on the other side surface of the die so as to face the die abutment surface. In the mold supporting device attached to the holder body via a fastener, a flat portion is provided on one side surface of the fastening plate, and a protrusion is provided on the other side surface opposite to the one side surface, A mold supporting device, wherein the plate is attached to the holder body in a reversible manner. 2. The mold supporting apparatus according to claim 1, wherein the protrusions of the fastening plate are provided at two upper and lower positions with respect to a fastener penetrating the fastening plate. 3. The upper and lower projections of the two upper and lower projections are provided at positions where they abut the die, and the lower projections are provided at positions where they abut the holder body.
The mold support device described. 4. The mold support according to claim 1, 2 or 3, wherein the holder main body is integrally provided in the longitudinal direction, and the fastening plate is attached to the holder main body in a plurality of divisions in the longitudinal direction. apparatus. 5. The mold supporting apparatus according to claim 1, wherein the tightening plate is provided with a through hole through which a fastener provided in the holder body penetrates, and the through hole is formed in a notch shape. .