JP2003117607A - Die for press bending machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a die for press bending machines with which the height of stepped bend is changeable as it is attached to a press bending machine and fine adjustment is simply performed. SOLUTION: The step of male die parts (13, 23) is formed in the tip part of a punch (10) and a die (20) and also placing planes (14, 24) are formed so as to continue on the male die parts and extend in the direction of the male die part of the other part opposing each other and positioning parts (15, 25) are formed on the placing planes. Female die blocks (16, 26) are placed by positioning by positioning parts on the placing planes, die surfaces (19, 29) comprising a female die part are formed on the female die blocks and the female die blocks are changeably held on the placing planes with magnets (18, 28).

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a die for a press bending machine, and more particularly to a die capable of performing step bending of various heights by a simple setup operation.

[0002]

2. Description of the Related Art There are various types of press bending machines such as a press brake, but the working form is basically such that a metal plate is set between a punch (upper die) and a die (lower die), and punching is performed. The male part and the female part of the die are matched with each other and a bending load is applied to the metal plate to plastically deform the metal plate.

Of the press bending processes, the step bending process is frequently applied to many parts of a pressed product, but the step height (hereinafter also referred to as the step bending height) may differ depending on the product part. Many. Therefore, if the so-called V-shape is used for step bending, it is necessary to replace the mold each time the height of the step bending is different, which is not only very complicated, but also requires a large number of molds, resulting in high cost. turn into.

Therefore, as shown in FIG.
00 and the body parts 110 and 210 of the die 200 are formed with male parts 120 and 220 at the facing end parts,
Recesses 130 and 230 are formed continuously with the male parts 120 and 220, and blocks 140 and 240 having substantially square side surfaces that form a female part are inserted into the recesses 130 and 230,
Bolt 16 through spacers (shims) 150, 250
It is fixed at 0 and 260, and the metal plate 30 is formed by the male and female mold parts.
A die for a press bending machine, which is adapted to perform a step bending process of 0, has been proposed.

In such a die, the four corners of the blocks 140 and 240 are formed as cutouts having mutually different sizes, and the corners are selected or the thicknesses of the spacers 160 and 260 are changed to make a step bend. The height of can be changed.

By the way, in the step bending, it is necessary to ensure the parallelism between the two bending lines in order to ensure the processing accuracy, but when the step bending height is changed, a thin spacer is inserted and removed. However, it is necessary to repeat the work of making fine adjustments to ensure the parallelism of the bending lines.

[0007]

However, in the conventional die for a press bending machine, when changing the height of step bending, the bolts 160 and 260 are removed and the blocks 140 and 240 are removed.
Since it is necessary to rotate the spacer or replace the spacers 150 and 250, it is very difficult to perform the above-mentioned fine adjustment with the mold attached to the press bending machine. In the end, remove the mold from the press bending machine. Work had to be done, and there was room for improvement in terms of complexity.

In view of the above problems, the present invention provides a die for a press bending machine in which the height of step bending can be changed while it is still attached to the press bending machine, and fine adjustment can be easily performed. This is an issue.

[0009]

In view of the above, a die for a press bending machine according to the present invention applies a bending load by a die-matching operation of a male die portion and a female die portion of a punch and a die to bend a plate-like work stepwise. In a die for a press bending machine to be processed, a male die portion is formed at a predetermined distance in the width direction when viewed from the center line of the step bending work at the tip portions of the punch and the die which are opposed to each other. The mounting plane is formed so as to be continuous with the male part and extend in the direction of the opposing male part, the positioning plane is formed on the mounting plane, and the female block is formed on the mounting plane. The female die block is placed and positioned by the positioning portion, and the female die block is formed with a die surface forming a female die portion extending in a direction upright with respect to the placing plane. On the writing surface Characterized in that it is Rikae capable retained.

One of the features of the present invention is to form a mounting plane continuously on the male parts of the punch and die to mount the female block, position it by the positioning part, and hold its position by the magnet. There is a point to do so.

As a result, the bending load is received by the positioning portion via the female block due to the die-matching operation of the male part and the female part of the punch and die, so that the female block is not displaced due to the bending load. Therefore, the desired step bending can be performed accurately.

As a result, it is not necessary to firmly fix the female block with the bolt as in the conventional case, and the female block can be held on the mounting plane by the magnet.
Therefore, it is possible to replace the female block and insert the spacer with the mold attached to the press bending machine.
Fine adjustment for ensuring the parallelism of the bending lines can be performed very easily and in a short time.

The concept of the present invention can also be applied to a female die of a die which is normally bent.

A die for a press bending machine according to the present invention is a die for a press bending machine for bending a plate-like work by applying a bending load by a die-matching operation of a male die portion and a female die portion of a punch and a die. , A die surface forming a female die portion is formed at a tip portion of the die facing the punch, and a mounting plane is formed so as to be continuous with the die surface and extend in the same direction as the die surface, A positioning part is formed on the terminal side of the mounting plane, and the female block is mounted on the mounting plane and positioned by the positioning part, and the female part constitutes the female part. The mold surface is formed so as to extend in a rising direction with respect to the mounting plane described above, and the female block is replaceably held on the mounting plane by a magnet.

If the female block can be positioned by the positioning portion, one or a plurality of concave portions and one or a plurality of convex portions can be engaged with each other.
Any form such as engagement of one or a plurality of convex portions and concave grooves may be used, but in order to surely receive a bending load and prevent positional displacement of the female block, the positioning portion is a mounting plane. It is preferable that the stepped portion is formed so as to rise to the terminal edge of and the end surface of the female block abuts.

Further, in ensuring the parallelism of the bending line,
It is more preferable that the step end surfaces of the positioning portion are parallel to the mold surface of the female mold block.

When finely adjusting the step bending height and parallelism, a spacer may be provided between the female block and the mounting plane. Also, a spacer may be provided between the female block and the positioning portion. In particular, in the present invention, since the female block is held on the mounting plane by the magnet,
Spacers can be inserted and removed very easily.

The female block may be in any form as long as it has one side forming the female part, but in view of handleability and manufacturability, the female block has a rectangular cross section and a positioning portion. Is preferably formed so as to rise at right angles to the mounting plane.

The magnet may be provided on the female block side, on the placement plane side, or on both sides. However, when the magnet is projected, the female block is placed or removed. Can get in the way. Therefore, it is preferable to form a recess on the back surface and / or the mounting plane of the female block, and to fit the magnet flush with the recess.

The female block and the spacer may be made of any material as long as it does not impair the magnetic attraction of the female block by the magnet.

[0021]

BEST MODE FOR CARRYING OUT THE INVENTION The present invention will be described in detail below with reference to specific examples. 1 to 3 show a preferred embodiment of a die for a press bending machine according to the present invention. In the figure,
The die comprises a combination of a punch 10 and a die 20.
In the punch 10, the main body 12 has a substantially inverted triangular shape on the side surface,
A mounting portion 11 for a press bending machine (not shown) is integrally formed at the upper end of the main body 12, and the mounting portion 11 has a three-dimensional shape having a substantially constant thickness continuous in the length direction.

On the other hand, the main body 22 of the die 20 has a side surface substantially in the shape of an inverted triangle, and the bottom surface thereof has a press bending machine (not shown).
Mounting recess 21 is integrally formed, and mounting recess 2
1 has a shape in which a substantially constant depth is continuous in the length direction.

Further, the main body 1 of the punch 10 and the die 20.
Male portions 13 and 23, which are substantially right-angled, are formed at the end portions of the members 2 and 22 which are opposed to each other at a predetermined distance in the width direction and continuously in the longitudinal direction when viewed from the center line a of the step bending process. Has been done.

Further, the body 1 of the punch 10 and the die 20.
Mounting planes 14 are formed at the opposite tips of the two and 22 so as to be continuous with one mold surface of the male mold portions 13 and 23 and extend in the same direction as the mold planes. Positioning step portions (positioning portions) 15 and 25 are provided at the end of the mounting plane 14,
Vertical direction from 24, female block 1 described later in the application
It is formed so as to be parallel to the mold surfaces 19 and 29 of 6 and 26.

Circular recesses 17 and 27 are formed in the centers of the mounting planes 14 and 24, and disk-shaped magnets 18 and 28 are fitted in the circular recesses 17 and 27 so as to be flush with each other and fixed. ing.

Further, female blocks 16 and 26 are placed on the placement planes 14 and 24, and are magnetically held by magnets 18 and 28. This female block 16, 26
The rear end face is positioned by being brought into contact with the positioning step portions 15 and 25. At the tips of the female mold blocks 15 and 25, the mold surfaces 19 and 29 forming the female mold portion are placed on the mounting plane 1
It is formed so as to extend in a direction perpendicular to 4 and 24.

When the metal plate W is bent stepwise, the punch 1 is used.
When the metal plate W is set between the die 0 and the die 20, the punch 10 is lowered and the opposing male and female die parts are subjected to the die matching operation to apply a bending load to the metal plate W, the step portion is bent to the metal plate W. Is processed.

At this time, the bending load due to the lowering of the male mold parts 13 and 23 is transmitted to the positioning step parts 15 and 25 through the female mold blocks 16 and 26 and is received by the positioning step parts 15 and 25. It is possible to perform a predetermined step bending process without causing displacement of 16 and 26.

When step bending is performed by the method as shown in FIG. 2, the step bending height is determined by the width of the female mold block. Therefore, when changing the step bending height, the step shown in FIG.
As shown in FIG.
6 is prepared, and the female mold blocks 16 and 26 are removed with the punch 10 and the main bodies 12 and 22 of the die 20 attached to the press bending machine, and the prepared female mold blocks 16 and 2 are removed.
Can be exchanged for 6.

When the step bending height is changed or the parallelism of the bending line is ensured, the spacer 30 is used as necessary.
Female blocks 16, 26 and mounting planes 14, 24 and / or
Alternatively, it may be inserted between the positioning step portions 15 and 25 and finely adjusted.

FIG. 4 shows a second embodiment, in which the same reference numerals as those in FIGS. 1 to 3 designate the same or corresponding parts.
In this example, the mounting planes 14 and 24 are formed so as to extend in the same direction with a step from one mold surface of the male mold portions 13 and 23. It does not have to be flush with the male parts 13, 23.

In FIG. 4 (a), step bending is performed by the same method as in the first embodiment, but the processing method is shown in FIG. 4 (b).
It is also possible to adopt the method shown in. In addition, in FIG.
In the case of the method shown in (b), since the height of step bending is determined by the thickness of the female blocks 16 and 26, when changing the height of step bending, the female blocks 1 having different thicknesses are used.
Prepare 6 and 26.

5 and 6 show a third embodiment, in which the same reference numerals as those in FIGS. 1 to 3 designate the same or corresponding parts. In this example, female blocks 16 and 26 having a length shorter than the lengths of the main bodies 12 and 22 are used, and a part of the metal plate W is bent as shown in FIG.

In the above example, one short female mold block 16, 26 was used to perform one step bending process as shown in FIG. 6, but a plurality of short female mold blocks 16, 26 are used.
The magnets 1 on the mounting planes 14 and 24 with a space therebetween.
It may be held by 8, 28 and a plurality of step bending processes may be performed at the same time.

FIG. 7 shows a fourth embodiment. In the drawings, the same reference numerals as those in FIGS. 1 to 6 denote the same or corresponding parts,
This is an example applied to a mold for performing a normal bending process.
In the figure, a die surface 32 forming a female die portion is formed on the tip side of the die 20 facing the punch 10, and
A mounting plane 24 is formed so as to be flush with the mold surface 32.

A female block 26 is placed on the placing plane 24 and positioned by a positioning step 25, and the female block 25 is held on the placing plane 24 by a magnet 28. On the female block 26, a die surface 31 forming a female die portion is formed so as to form a predetermined angle with the die surface 32.

In the mold of this example, bending can be performed using the punch 10 and the die 20. When changing the bending angle, the female block 26 in which the angle of the mold surface 31 with respect to the mold surface 32 is different may be used.

[Brief description of drawings]

FIG. 1 is a schematic perspective view showing a preferred embodiment of a die for a press bending machine according to the present invention.

FIG. 2 is a sectional side view showing the embodiment.

FIG. 3 is a diagram schematically showing an operation of changing the height of stepwise bending in the above embodiment.

FIG. 4 is a sectional side view showing a method of two step bending processes in the second embodiment.

FIG. 5 is a schematic perspective view showing a third embodiment.

FIG. 6 is a schematic perspective view showing a metal plate that has been stepped according to a third embodiment.

FIG. 7 is a sectional side view showing a fourth embodiment.

FIG. 8 is a view showing a conventional die for a press bending machine.

[Explanation of symbols]

10 punches 13 Male part 14 Placement plane 15 Positioning step (positioning section) 16 female block 17 recess 18 magnets 19 mold surface 20 dies 23 Male part 24 Placement plane 25 Positioning step (positioning section) 26 Female Block 27 recess 28 magnets 29 mold surface 30 spacers 31, 32 type surface W Metal plate (plate work)

─────────────────────────────────────────────────── ─── Continuation of front page (51) Int.Cl. ⁷ Identification code FI theme code (reference) B21D 37/04 B21D 37/04 R 37/14 37/14 H J

Claims (8)

[Claims] 1. A die for a press-bending machine for bending a plate-like work stepwise by applying a bending load by a die-matching operation of a male die portion and a female die portion of a punch and a die, wherein the punch and the die are opposed to each other. A male part is formed at a predetermined distance in the width direction when viewed from the center line of the step bending process, and the mounting plane is continuous with and opposes the male part of the opposite side. It is formed so as to extend in the direction of the mold portion, the positioning plane is formed on the mounting plane, and the female block is mounted on the mounting plane and positioned by the positioning section. A press characterized in that a mold surface forming a female mold portion is formed so as to extend in a direction in which it stands up with respect to the placing plane, and the female block is held by a magnet so as to be replaceable. Bending machine Mold. 2. A die for a press bending machine for bending a plate-like work by applying a bending load by a die-matching operation of a male die portion and a female die portion of a punch and a die, and a tip facing the punch of the die. A mold surface forming a female mold portion is formed on the part, and a mounting plane is formed so as to be continuous with the mold surface and extend in the same direction as the mold surface. Positioning is performed on the terminal side of the mounting plane. Is formed, and the female block is placed on the placing plane and is positioned by the positioning portion, and the die surface forming the female portion is formed in the female block with respect to the placing plane. A die for a press bending machine, wherein the die block is formed so as to extend in a rising direction, and the female block is held by a magnet so as to be replaceable on the placement plane. 3. The mold for a press bending machine according to claim 1, wherein the positioning portion is a step portion which is formed so as to rise on a terminal edge of the placement plane and which is in contact with an end surface of the female die block. . 4. The step end surface of the positioning portion is parallel to the mold surface of the female block.
Mold for press bending machine described. 5. The die for a press bending machine according to claim 1, wherein a spacer is provided between the female die block and the placement plane. 6. The mold for a press bending machine according to claim 1, wherein a spacer is provided between the female block and the positioning portion. 7. The press bending machine metal according to any one of claims 3 to 6, wherein the female block has a rectangular cross section, and the positioning portion is formed upright at a right angle to the placement plane. Type. 8. The recess according to claim 1, wherein a recess is formed in the back surface of the female block and / or the placement plane, and the magnet is fitted in the recess in a flush manner. Die for press bending machine.