JP3106821B2 - Press 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 press apparatus for bending an end of a sheet material.

[0002]

2. Description of the Related Art Japanese Patent Application Laid-Open No. SHO 59-197318 discloses a press apparatus for further bending a plate-like material formed into a predetermined shape by approaching it to a predetermined angle. , FIG. 9 and FIG. The press device 1 includes a lower die 2, and a support surface 2 s for supporting a panel w (plate-shaped material) from below is formed at a predetermined position on the lower die 2. Further, a cam groove 2m having an arcuate surface is formed substantially horizontally at the upper center of the lower mold 2, and the rotary cam 4 is housed in the cam groove 2m so as to be rotatable. The rotary cam 4 is accommodated in the cam groove 2m in a tightly contacted state, and a U groove 4n having a substantially U-shaped cross section is formed in the axial direction from the outer surface to the center. An end surface 4t that supports the panel w from below together with the support surface 2s of the lower die 2 is formed near the U groove 4n on the outer surface of the rotary cam 4. The rotating cam 4 is formed at a predetermined angle on the back side of the end surface 4t with a bent portion 4f forming a side wall surface of the U groove 4n.
Further, the U-groove 4n functions as a rotation stopper of the rotating cam 4 in the clockwise direction in the figure at a position facing the bending portion 4f.
A slide plate 4b for guiding into the groove 4n is fixed. Here, the rotary cam 4 has a structure that is rotated by an air cylinder (not shown). When the lower surface of the slide plate 4b is in contact with the wall surface 2w of the lower mold 2, the direction of the slide plate 4b is adjusted. The end surface 4t of the rotary cam 4 located on the side is connected to the support surface 2s of the lower die 2.

The holding surface 2s of the lower die 2 and the rotating cam 4
Above the end surface 4t, a pad 6 attached to an upper die holder (not shown) via a spring is arranged, and the lower die holder lowers the pad 6 to support the lower die 2. 2s and the end face 4t of the rotary cam 4 can be brought into surface contact. Thus, the panel w can be positioned between the pad 6 and the support surface 2s of the lower die 2 and the end surface 4t of the rotary cam 4. Further, a suspension cam 8 attached to the upper die holder in a state in which a lateral movement is allowed is disposed above the slide plate 4b of the rotary cam 4. The suspension cam 8 has a curved blade formed at the tip, and the lower surface 8d of the curved blade can come into surface contact with the slide plate 4b. Also,
At the tip of the curved blade, there are formed a pressing blade 8p and a vertical blade 8e for bending the end of the panel w downward, and further, a bent portion 4f of the rotary cam 4 on the vertical blade 8e.
8f is formed to engage with the bending blade 8f.

[0004] The following procedure is used to bend the end of the panel w using the press device 1 described above. The lower mold 2
When the panel w is set on the supporting surface 2s formed in the above, the upper die holder starts to descend, and during the descending, the rotary cam 4 is first rotated clockwise by the air cylinder. And, the slide plate 4b of the rotary cam 4 is
The rotation of the rotary cam 4 is stopped in a state where the rotary cam 4 is in contact with the wall surface 2w. As a result, the end face 4t of the rotary cam 4 is continuous with the support surface 2s of the lower die 2, and the panel w is supported from below by the end face 4t of the rotary cam 4 and the support surface 2s of the lower die 2. In this state, when the pad 6 comes into contact with the panel w, the panel w is connected to the pad 6 and the support surface 2s of the lower mold 2.
9 between the rotary cam 4 and the end face 4t.
As shown in (A), it is positioned at that position.
When the upper die holder further descends from this state, the suspension cam 8 descends while the pad 6 is held at that position, and the pressing blade 8f of the curved blade of the suspension cam 8 is attached to the end of the panel w. In the collision, the end is bent downward, and the vertical blade 8e performs the vertical bending while pressing the end. In this manner, when the lower surface 8d of the curved blade of the suspension cam 8 comes into contact with the slide plate 4b, the suspension cam 8 obliquely follows the slide plate 4b as shown in FIG. 9B. It moves downward and presses the edge of the vertically bent panel w until the bent edge 8f of the curved blade comes into contact with the shifted bent portion 4f of the rotary cam 4. Thus, the end of the panel w is bent at a predetermined angle.

[0005]

When the hanging cam 8 vertically bends the end of the panel w, a large downward impact force is applied to the end face 4t of the rotary cam 4 which supports the panel w from below. Is added. However, in the above-described conventional press device, when the hanging cam 8 collides with the end of the panel w, as shown in FIG.
Is not in contact with the slide plate 4b of the rotary cam 4, and the rotary cam 4 is merely held at the current position by the force of the air cylinder. For this reason, the supporting force of the rotating cam 4 on the panel w may be less than the impact force of the suspension cam 8, and the end face 4t of the rotating cam 4 may be pushed down as shown in FIG. As a result,
A gap is formed between the pad 6 and the end face 4t of the rotary cam 4, and the support of the panel w becomes poor. As a result, as shown in FIG. The technical problem of the present invention is to perform vertical bending, that is,
Even when the lower surface 8d of the suspension cam 8 is not in contact with the slide plate 4b of the rotary cam 4, the rotary cam 4 can be securely locked to the lower mold 2 so that the panel w can be stably supported. Thus, the vertical bending of the panel w is performed well.

[0006]

The above object is achieved by a press having the following features. That is, the press device according to the present invention is a press device that, when bending an end portion of a plate-shaped material, vertically bends the end portion from a set position of the plate-shaped material, and then continuously moves and approaches a predetermined angle. A lower mold having a support surface for supporting the plate material from below, and an end face that is rotatably mounted on the lower mold and supports the plate material from below together with the support surface of the lower mold. A rotating cam having a bent portion formed at a predetermined angle with respect to the end face thereof, and a structure capable of ascending and descending, sandwiching a plate-shaped material in cooperation with the lower die supporting surface and the end face of the rotating cam. The pad to be positioned at, and can move up and down, and has a structure that can be displaced in the horizontal direction, the end of the plate-shaped material positioned at the set position in the process of descending is vertically bent, and further, the rotating cam On the slide surface provided In the process of moving, and a hanging cam bending Asked the end of the vertical bent by said plate-like material to a position abutting the submitted bent portion of the rotary cam and obliquely downward I. A lock mechanism is provided between the rotary cam and the lower die to lock the rotary cam with respect to the lower die before the plate-shaped material is vertically bent by the suspension cam.

[0007]

According to the present invention, between the rotating cam and the lower mold,
Before the plate-shaped material is vertically bent by the hanging cam,
A lock mechanism for locking the rotating cam with respect to the lower mold is provided. For this reason, even if the hanging cam collides with the end of the plate-shaped material and a large downward impact force is applied to the end surface of the rotating cam that supports the plate-shaped material from below, the rotation cam allows the rotating cam to function. There is no deviation from the lower mold. That is, since the end face of the rotary cam does not lower with respect to the support surface of the lower mold, no gap is formed between the end face of the rotary cam and the pad, and the plate-like material is initially supported. And it is kept well. For this reason, vertical bending, which could not be performed stably in the past, is favorably performed.
Further, when the end of the vertically bent plate-shaped material is further shifted to a position where it comes into contact with the shift bending portion of the rotating cam, the lock mechanism is working between the rotating cam and the lower mold. Therefore, the rotating cam does not shift with respect to the lower mold, and the plate-shaped material is favorably bent.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a press apparatus according to an embodiment of the present invention will be described with reference to FIGS. Here, FIG.
FIG. 2 is a side view of a main part of the press device according to the present embodiment during pressing, and FIG. 2 is a longitudinal sectional view of FIG. FIG.
FIG. 2 is a perspective view of a main part of FIG. The press device 10 includes:
A lower die 12 is provided, and a support surface 12s for supporting a panel w (plate-like material) from below is formed at a predetermined position on the lower die 12. Furthermore, a cam groove 12m having an arc surface is formed substantially horizontally at the upper center of the lower mold 12.
The rotating cam 14 is housed in the cam groove 12m so as to be rotatable. A heel block 12y (see FIGS. 1 and 3) that supports a side surface of a driver cam 25 described later from one side is fixed to a side surface of the lower mold 12. The heel block 12y is a rectangular block, and a surface that contacts the side surface of the driver cam 25 is formed substantially perpendicularly.

The rotary cam 14 is provided with the cam groove 1 of the lower mold 12.
A U-shaped groove 14n having a substantially U-shaped cross section is formed in the axial direction from the outer surface to the center. The outer surface of the rotary cam 14 has a U-shaped groove 14.
In the vicinity of n, an end surface 14t for supporting the panel w from below together with the support surface 12s of the lower die 12 is formed. Further, the rotating cam 14 has a U
A shift bent portion 14f forming a side wall surface of the groove 14n is formed at a predetermined angle. Further, the U-groove 14n functions as a rotation stopper of the rotating cam 14 in the clockwise direction in the drawing at a position facing the shift bending portion 14f.
A slide plate 14b for guiding a suspension cam 18 to be described later into the U groove 14n is fixed. Here, the rotating cam 1
Reference numeral 4 denotes a structure which is rotated by an air cylinder 15, and the rotary cam 14 is rotated rightward in the figure, so that the lower surface of the slide plate 14b is a wall surface 12w of the lower die 12 (see FIG. 2).
, The end surface 14t of the rotary cam 14 located on the opposite side of the slide plate 14b is continuous with the support surface 12s of the lower die 12. A guide block 14 a is fixed to a side surface of the rotary cam 14 at a position facing the heel block 12 y of the lower mold 12. As shown in FIG. 3, the guide block 14a is a substantially rectangular block, and a flat surface is formed on the side facing the heel block 12y. The upper surface of the plane is chamfered.

Above the lower die 12, an upper die holder 20 attached to a lifting device (not shown) is arranged. On the outer surface of the upper die holder 20, as shown in FIG. A T-shaped driver cam 25 is mounted vertically. The driver cam 25 has a front end 25f formed with a specified width L. The front end 25f of the driver cam 25 has a heel block 12y of the lower die 12 and a guide block 14a of the rotary cam 14 during the lowering of the upper die holder 20. And is inserted between them. Thus, the distance between the vertical surface of the heel block 12y and the plane of the guide block 14a is maintained at the distance L, and the rotation of the rotary cam 14 counterclockwise in the drawing is restricted. Here, driver cam 2
The width L of the distal end portion 25f of the rotary cam 14 is such that the end surface 14t of the rotary cam 14 is in a state where the distal end portion 25f is inserted between the heel block 12y and the guide block 14a.
Is set to a value that is a surface that is continuous with the support surface 12s of. In addition, since the upper part of the plane of the guide block 14a is chamfered, even if the rotation position of the rotary cam 14 is slightly deviated from a predetermined position, the driver cam 25 can move between the heel block 12y and the guide block 14a. Inserted smoothly between. That is, the driver cam 25, the heel block 12y of the lower mold 12, and the guide block 14a of the rotary cam 14 correspond to a lock mechanism of the present invention. The upper surface of the slide plate 14b of the rotary cam 14 corresponds to the slide surface of the present invention.

A pad 16 is mounted inside the upper die holder 20 in a state in which the upper die holder 20 is allowed to move vertically. The pad 16 has a holding surface 12 s of the lower mold 12 and an end surface 14 of the rotating cam 14.
The slider 16s provided on the vertical wall surface of the pad 16 is in surface contact with a vertical slide surface 20s formed on the inner wall surface of the upper die holder 20. As a result, the pad 16 is attached to the upper mold holder 2.
It can be displaced up and down without swinging with respect to zero.
Further, around the hanging rod (not shown) for attaching the pad 16 to the upper die holder 20, the pad 16
A first spring 22 (see FIG. 2) biased in a direction away from the ceiling surface 20t of the upper die holder 20 is mounted. With this structure, when the upper die holder 20 is lowered to a predetermined position, the pad 16 is moved to the supporting surface 12 of the lower die 12.
s and the end surface 14t of the rotary cam 14 come into surface contact. Therefore, when the pad 16 comes into surface contact with the panel w while the panel w is set on the support surface 12s of the lower mold 12 and the end surface 14t of the rotary cam 14, the panel w is subjected to the spring force of the first spring 22. The pad 16 is sandwiched between the support surface 12s and the end surface 14t by a corresponding force, and is positioned at that position.

As shown in detail in FIG. 2, a suspension cam 18 is mounted inside the upper die holder 20 in a state in which the upper die holder 20 is allowed to move in the lateral direction. ing. The hanging cam 18 is provided with the rotating cam 1.
4 is disposed directly above the slide plate 14b, and between the side surface of the suspension cam 18 and the receiving portion 20u of the upper die holder 20, the suspension cam 18 is pressed rightward in the drawing. Two springs 23 are mounted. The hanging cam 18 has a curved blade at its tip.
4 is molded into a shape that can be inserted into the U groove 14n,
A lower surface 18d that is in surface contact with the slide plate 14b is formed below the curved blade. At the tip of the curved blade, a horizontal pressing blade 18p that collides with an end of the panel w and bends the edge, and a vertical blade 18e that bends the end of the panel w vertically is formed. I have. Further, the bent portion 14 of the rotary cam 14 is located above the vertical blade 18e.
A shift bending blade 18f that engages with f is formed.

Next, the operation of the press apparatus according to this embodiment will be described. First, with the upper mold holder 20 at the upper limit position, the panel w is placed on the support surface 12s formed on the lower mold 12.
Is set, an elevating device (not shown) is driven, and the upper die holder 20 starts lowering. When the upper die holder 20 starts to descend, first, the rotary cam 14 is rotated clockwise by the air cylinder 15 in the drawing. The sliding plate 14b of the rotary cam 14 is mounted on the wall surface 1 of the lower mold 12.
The rotation of the rotary cam 14 is stopped in the state of contact with 2w. As a result, the end surface 14t of the rotary cam 14 becomes substantially continuous with the support surface 12s of the lower mold 12, and the panel w
Is the end surface 14t of the rotary cam 14 and the support surface 12s of the lower mold 12.
And is supported from below. Next, as shown in FIG. 1, with the lowering of the upper die holder 20, the tip 2 of the driver cam 25 fixed to the upper die holder 20.
5f is a heel block 12y and a rotary cam 14 of the lower mold 12.
Is inserted between the guide block 14a. Here, since the width of the distal end portion 25f of the driver cam 25 is set to L, the distal end portion 25f is
While being inserted between 2y and the guide block 14a,
A distance L is maintained between the vertical plane of the heel block 12y and the plane of the guide block 14a. As a result, the end surface 14t of the rotary cam 14 is
The rotation in the counterclockwise direction in the figure is restricted while maintaining the state continuous with s.

Further, the upper mold holder 20 descends,
When the pad 16 comes into contact with the panel w, the panel w is connected to the pad 16, the support surface 12 s of the lower mold 12, and the rotating cam 14.
And is positioned at that position as shown in FIG. 1, FIG. 2, and FIG. Here, the tip 25f of the driver cam 25 is the heel block 1
The timing at which the pad 16 is inserted between the second block 2y and the guide block 14a is set 30 degrees from the position where the pad 16 contacts the panel w.
It is set at a position higher by mm. When the upper die holder 20 further descends from this state, the suspending cam 18 relatively descends while the pad 16 is held at that position, and the pressing blade 18p of the curved blade of the suspending cam 18 is moved to the panel w.
As shown in FIG. 4 (A), the end of the suspension cam 18 is bent downward, and the vertical blade 18e of the suspension cam 18 presses the end, as shown in FIG. 4 (A). A vertical bend of the end is performed as shown in FIG.

In this manner, the suspension cam 18 is lowered by a specified amount, and as shown by a two-dot chain line in FIG.
When the lower surface 18d abuts on the slide plate 14b, the suspension cam 18 then moves obliquely downward along the slide plate 14b against the spring force of the second spring 23, as shown in FIGS. So that the end of the panel w is sandwiched and pressed between the shift bending blade 18f of the suspension cam 18 and the shift bending portion 14f of the rotary cam 14. by this,
The end of the panel w is bent at a predetermined angle as shown in FIG.

As described above, the press apparatus 10 according to the present embodiment
According to this, before the panel w is vertically bent by the suspension cam 18, the rotating cam 14 is locked to the lower mold 12 by the operation of the guide block 14a, the heel block 12y and the driver cam 25. For this reason, even when the hanging cam 18 collides with the end of the panel w and a large downward impact force is applied to the end surface 14t of the rotating cam 14 that supports the panel w from below, the rotating cam 14 There is no gap. That is, the support surface 12 of the lower mold 12
Since the end face 14t of the rotary cam 14 does not fall with respect to the s, no gap is formed between the end face 14t of the rotary cam 14 and the pad 16, and the panel w is preferably kept in the initially supported state. Is held. For this reason, vertical bending, which could not be performed stably in the past, is favorably performed. Also,
The end of the vertically bent panel w is further rotated
4 when bending to the position of the shift bending portion 14f,
Since the rotating cam 14 and the lower mold 14 are held in a locked state, the rotating cam 14 does not shift with respect to the lower mold 12, and the end of the panel w can be favorably bent.
Further, the vertical bending and the close bending can be stably performed in one step, so that the processing cost can be reduced.

[0017]

According to the present invention, since the lock mechanism is provided between the rotating cam and the lower mold, the hanging cam collides with the end of the plate-shaped material and the hanging cam faces the end face of the rotating cam downward. Even if a large impact force is applied, the rotation mechanism does not cause the rotation cam to shift with respect to the lower mold. For this reason,
There is no gap between the end face of the rotating cam and the pad, and the plate-shaped material is satisfactorily held in the initially supported state. As a result, vertical bending, which could not be performed stably in the past, is favorably performed. Also, even when bending and bending, because the lock mechanism is working between the rotating cam and the lower mold,
The rotating cam is not displaced with respect to the lower mold, and the plate-shaped material is favorably bent.

[Brief description of the drawings]

FIG. 1 is a side view of a main part of a press device according to an embodiment of the present invention during pressing.

FIG. 2 is a longitudinal sectional view of FIG.

FIG. 3 is a perspective view of a main part of FIG. 1;

FIG. 4 is a schematic diagram showing a state of vertical bending of a panel.

FIG. 5 is a side view of a main part of the press device according to the embodiment of the present invention at the end of pressing.

FIG. 6 is a longitudinal sectional view of FIG.

FIG. 7 is a perspective view of a main part of FIG. 5;

FIG. 8 is a schematic diagram showing a state of a panel being bent toward a position.

FIG. 9 is a sectional view of a main part of a conventional press device.

FIG. 10 is a schematic diagram when vertical bending is performed in a conventional press device.

[Explanation of symbols]

 w Panel (plate-like material) 10 Press device 12 Lower die 12y Heel block (Lock mechanism) 14 Rotating cam 14a Guide block (Lock mechanism) 16 Pad 18 Suspended cam 20 Upper die holder 25 Driver cam (Lock mechanism)

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. ⁷ , DB name) B21D 5/01

Claims (1)

(57) [Claims] 1. A press device for bending an end of a plate material, wherein the end portion is vertically bent from a set position of the plate material, and then continuously bent to a predetermined angle. A lower mold having a supporting surface for supporting the plate-shaped material from below, together with a supporting surface of the lower mold, and A rotary cam including a bent portion formed at a predetermined angle, and a pad that has a structure capable of ascending and descending, and that positions the plate-shaped material by sandwiching the plate-shaped material in cooperation with the support surface of the lower die and the end surface of the rotary cam. , It can move up and down and can be displaced in the horizontal direction.
In the process of descending, the end of the plate-shaped material positioned at the set position is vertically bent, and further, in the process of moving diagonally downward following the slide surface provided on the rotary cam, the plate-shaped vertically bent A suspending cam for bending and bending an end of the material to a position where it comes into contact with a bending portion of the rotating cam; and a plate-shaped material is vertically bent by the suspending cam between the rotating cam and the lower die. A press mechanism that locks the rotating cam with respect to the lower die before the pressing.