JP3515151B2 - Bending method and apparatus - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and an apparatus for bending a workpiece to form a torsion.

[0002]

2. Description of the Related Art Conventionally, a work such as cutting and raising is performed on a work by using a die set of a press machine or a turret punch press.

[0003]

By the way, in order to cut and raise a work using a die set or a turret punch press of the above-mentioned conventional press machine, both the steps of shearing and bending are required. there were. In the shearing process, a clearance of 1/100 mm unit was required, and this clearance adjustment was difficult. Also, in the bending process, as the rising height is lower, the shoulder radius of the die becomes smaller, and the thrust force increases in inverse proportion thereto, so that a thrust countermeasure was indispensable.

SUMMARY OF THE INVENTION An object of the present invention is to provide a bending method and apparatus for easily torsion-forming a work without considering a clearance adjustment and a thrust countermeasure in order to solve the above problems. It is in.

[0005]

According to the present invention, there is provided the present invention as described above.
It was made in view of the conventional problems.
When processing the slit by laser processing,
Inner and outer workpieces surrounded by a slot
Fine connection parts are left at opposite positions to connect
To perform the laser processing, and
In the processing, the cross-sectional shape of the fine connection part is
And the direction perpendicular to the thickness direction
Laser processing diagonally so that it has a square shape with corners
Then, using the opposed fine connecting portion as a bending line,
This is a bending method for rotating a workpiece.

Further , the present invention provides a method for forming a slit on a plate-like work.
When processing the inside, the inner wire surrounded by the slit
To connect the workpiece and the outer workpiece
Processing of the slit was performed leaving a fine connection part at the position
After the above-mentioned work piece, the above-mentioned opposing fine connection part is bent.
This is a bending device for bending as
In a direction relatively approaching and separating from the punch and the punch.
Movable die and whether the punch is provided rotatably
Fan-shaped roller that can freely contact one side of the work piece
Punch and the work facing the rolling punch.
The other side of the piece is rotatably mounted on the die.
A fan-shaped rolling die,
The work piece by the punch and the rolling die
While bending the work piece, bending the bending line of the work piece.
The rolling punch and the rolling die
And (b) are integrally rotatable in the same direction.
It is.

[0007]

[0008]

[0009]

[0010]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below in detail with reference to the drawings.

Referring to FIGS. 1A, 1B, and 1C, a substantially rectangular slit S is formed, for example, by a laser, leaving a fine connecting portion J facing the work W, for example, about half the plate thickness. It is formed by processing. With the slit S as a boundary, the work W _A outside the slit S and the work piece W inside the slit S
Divided into _B.

[0012] The center of the fold line W _L as the center of rotation C as the workpiece W opposite the fine connecting portion J of the bend line W _L for the _B, as indicated by the arrows in FIG. 1 (A) a by and which can be rotated workpiece W _B clockwise around, is shown at both ends as if being in such a form of the hinge twisted fine connecting portion J is 90 ° in the workpiece W _B in FIG. 1 (C) Torsion molding can be performed.

The cross-sectional shape of the fine connecting portion J is a work W
When the plate thickness is t, a square of t / 2, which is close to a round cross-section as shown in FIG. 2A, is ideal, but it is difficult to process, so as shown in FIG. Shape becomes practical. However, as shown in FIG. 2 (B), it is cut obliquely by a three-dimensional laser processing machine,
By forming a square cross section having corner portions facing each other, the shape can be made closer to the shape shown in FIG. 2A by one step.

Referring to FIG. 3, FIG. 4 and FIG. 5, the bending apparatus includes, for example, a punch 1 provided at a lower part of an upper table in a press brake, and an upper part of a lower table which can be moved up and down by a hydraulic cylinder or the like. And a die 3 provided in the main body.

A guide groove 5 formed of a semicircular arc is formed at the front and rear of the lower portion of the punch 1. Each of the guide grooves 5 has a guide member 7F, 7B having a 90-degree fan shape.
And a rolling punch 9 having a 90-degree fan shape is integrated between the guide members 7F and 7B. Accordingly, the guide members 7F and 7B are guided by the respective guide grooves 5 to be rotated, and the rolling punch 9 is also rotated together.

A guide groove 11 having a semicircular arc shape is formed at the upper and lower portions of the die 3 similarly to the punch 1. A guide member 13F, 13B having a 90-degree fan shape is engaged with the guide groove 11, and a hemispherical rolling die 15 is integrated with the guide members 13F, 13B. Accordingly, the guide members 13F and 13B are guided by the respective guide grooves 11 to be rotated, and the rolling die 15 is also rotated together.

A rotating shaft 17 is provided on the front surface of the rolling die 15, and a gear 19 having a semicircular arc shape is integrated with the rotating shaft 17. A gear link 21 is screwed to the gear 19. The gear link 21 is rotatably supported on the die 3 by a rotation shaft 23.

At one end of the gear link 21, the tip of a piston rod 29 mounted on, for example, a fluid cylinder 27 as an actuator is mounted by a mounting bracket 25.

According to the above configuration, the work W is placed on the die 3 and the opposing fine connecting portions J of the work W are bent and bent.
Allowed to position the fold line W _L substantially at the center of the rolling die 15. When allowed to rise upward in FIG. 3 the die 3 in this state, the workpiece W _A is clamped sandwiched between the punch 1 and the die 3. Moreover, the work piece W _b is clamped by a rolling punch 9 and the rolling die 15.

Next, by operating the fluid cylinder 27 and lowering the piston rod 29 from the position indicated by the solid line to the position indicated by the two-dot chain line in FIG. 3, the gear link 21 rotates counterclockwise around the rotation shaft 23 as a fulcrum. It is turned. The rotation of the gear link 21 causes the gear 19 to rotate clockwise.

[0021] integrally with the result, a state in which a rolling punch 9 and the rolling die 15 has clamped the workpiece W _B
The same direction, as shown in FIG. 6, will be 90 degrees rotated. In other words, the work piece W _B from both sides
By being twisted about the bending line as the rotation center in the sandwiched state, it is bent by 90 degrees and torsion molding is performed.

Therefore, torsion molding can be easily performed on the work W without considering clearance adjustment and thrust countermeasures.

FIG. 7 shows another embodiment. FIG.
In, the lower end of the punch 1 groove 31 needed to penetrate when bent work piece W _b are formed.
On the other hand, the die 3 includes an upper die 3U and a lower die 3D. The upper die 3U and the lower die 3D are attached with a plurality of through bolts 33, and the lower die 3D is connected to the upper die 3U. It is always urged downward by the urging force of the spring 35.

An upper die 3U formed in the punch 1 and corresponding to the groove 31 is formed with a vertically penetrating hole 3H, into which a vertically movable bending member 37 is inserted. . The lower portion of the bending member 37 is attached to the lower die 3D with through bolts 39.

With the above structure, the work W is moved to the upper die 3U.
Fine connecting portion J which faces the placing on the workpiece W and fold lines and allowed positioned on the right side portion of the hole 3H of the fold line W _L formed in the upper die 3U. In this state, when the die 3 is moved upward in FIG.
_a is clamped between the punch 1 and the upper die 3U. At this time, the work piece _Wb is at a position corresponding to the groove 31 of the punch 1.

Next, when the die 3 is further raised,
When the lower die 3D rises against the urging force of the spring 35, the bending member 37 rises and the work piece W _b
Is lifted.

[0027] As a result, the work piece W _b will be the fold line W _L is bent 90 degrees in the rotation center torsion molding is performed. Therefore, the same effects as in the above-described embodiment can be obtained.

The present invention is not limited to the above-described embodiment, but can be embodied in other modes by making appropriate changes. In the present embodiment, an example in which the die 3 is moved upward is described, but the punch 1 may be moved downward.

[0029]

As will be understood from the above description of the embodiment, according to the present invention, since the construction is as described in the claims, the clearance adjustment and thrust countermeasures can be taken into consideration. Easy torsion molding can be performed.

[Brief description of the drawings]

FIG. 1 is an explanatory view illustrating a bending method according to the present invention.

FIG. 2 is an explanatory diagram illustrating a fine connecting portion.

FIG. 3 is a front sectional view of a bending apparatus according to one embodiment of the present invention;

FIG. 4 is an arrow view taken along the line IV-IV in FIG. 3;

FIG. 5 is an assembled perspective view of FIG.

FIG. 6 is an operation explanatory diagram for explaining the operation.

FIG. 7 is a front sectional view of another bending apparatus.

[Explanation of symbols]

1 punch 3 die 9 rolling punch 15 rolling die W workpiece W _a slit outside the workpiece W _b workpiece S slit in the slit

Claims (2)

(57) [Claims] 1. A plate-like workpiece (W) is formed by laser processing.
When processing the slit (S)
(S) the inner work piece (W _B ) And outside
Opposite positions to connect the work (W) on the side
Laser processing, leaving a fine connection (J)
Laser processing of the fine connection part (J)
The cross-sectional shape of (J) is the thickness direction and the thickness direction of the work (W).
Corners opposing each other in the direction perpendicular to the
Laser processing diagonally so that it becomes a square shape
The fine joint (J) opposed to the bent line (W) _L As)
The work piece (W _B Bending characterized by pivoting
Processing method. 2. A slit (S) is formed in a plate-like work (W).
When processing, the inside surrounded by the slit (S)
In order to connect the work piece and the outside work (W),
Leave the slit at the opposing position, leaving the fine joint (J).
(S), the work pieces after processing are opposed to each other.
To bend the fine connection part (J) as a bending line
And a punching device (1) and the punch
(1) It is movable in the direction relatively approaching and moving away from
A die (3) and the punch (1) are provided rotatably.
And a fan-shaped lorry that can freely contact one side of the work piece.
Rolling punch (9) and the rolling punch (19)
The die is opposed to the other side of the work piece so as to face the work piece.
(3) A fan-shaped rolling die rotatably provided in (3)
(15), wherein the rolling punch (9) and the
The work piece is clamped by a rolling die (15).
The bending line of the work piece
The rolling punch (9) and the rolling die
B) and (15) are integrally rotatable in the same direction.
A bending apparatus.