JP3388225B2 - Sheet bending machine - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION The present invention relates to a plate bending machine,
In particular, the present invention relates to a plate material bending machine that performs normal bending and reverse bending by ironing.

[0002]

2. Description of the Related Art Generally, a plate material bending machine for performing a forward bending and a reverse bending by ironing bending is provided with a bottom die and a top die which are vertically opposed to each other and hold a plate material, and are arranged substantially horizontally behind them. With a bent beam,
The tip of the bend beam is U-shaped, and bend dies are attached to the upper and lower two arm portions of the U-shaped tip, respectively, and by the combined motion of the eccentric shaft mechanism and the fluid pressure cylinder device, When the bend beam is turned upward, the plate material held by the bottom die and the top die is bent normally by the lower bend die, while the bend beam is turned downward and the upper bend is turned. The gripping plate material is reversely bent by a mold.

[0003]

In the plate material folding machine as described above, the bend beam extends horizontally in the left and right directions behind the bottom die and the top die that hold the plate material, and the rear part of the bottom die and the top die. Since there is a back wall of the U-shaped tip of the bend beam, the rising dimension (flange dimension) of the bending is limited by the bob size of the U-shaped tip, and the rising dimension is the U-shaped tip. Bending larger than the bosom size cannot be performed.

Further, in the plate bending machine as described above,
In order to increase the rising dimension, the size of the machine becomes large, and a large floor area is required to install this plate bending machine.

The present invention has been made by paying attention to the above-mentioned problems in the conventional plate bending machine, and does not limit the rising dimension of the bending, and can be downsized. It is an object of the present invention to provide a plate material folding machine having a new structure that does not require a large floor area for installation.

[0006]

In view of the conventional problems as described above, in the invention according to claim 1, a plate material can be held between the bottom die and the lower fixed table supporting the bottom die. provided vertically movable die supporting plate that supports the top die, to bend forward bend and folding down for folding the projecting portions in the direction upward direction after the sheet gripped by the said bottom die and the top die In a plate bending machine with vertically movable bend dies that have the reverse bending portions separated from each other, a drive plate that is vertically movable and movable back and forth has a predetermined ratio to the vertical movement amount. in rotatably so provided before and after a positive bend Rutotomoni, in the bend die disposed for free vertical positioning of the front Symbol bend die on the driving plate
Is provided above the reverse bending portion, and the forward bending portion and the reverse bending portion are
And a concave portion is formed between and.

The invention according to claim 2 supports the bottom die.
The bottom die above the bottom fixed table
A die support that supports a top die that can hold a plate material between
A plate is provided so that it can move up and down, and the bottom die and top die are
Bend the rearward protruding part of the gripped plate material upward.
Forward bending part for bending and reverse bending part for bending downward
Bend mold with vertical separation is provided so that it can move up and down
In the plate material bending machine,
A forward bending portion is provided above the reverse bending portion and the forward bending portion is
A concave portion is formed between the barb portion and the reverse bending portion, and
The vertically movable drive member supporting the bend die is
It is lower than Tom Dye.

[0008]

Embodiments of the present invention will be described in detail below with reference to the drawings.

1 to 3 show an embodiment of a plate bending machine according to the present invention. The plate bending machine is a plate-shaped lower fixed table 3 vertically arranged between the left and right side frames 1.
The bottom die 7 is horizontally fixed to the upper end of the lower fixed table 3 by the die holder 5.

The left and right side frames 1 respectively support the left and right movable support plates 11 by means of horizontal shafts 9 so that one ends thereof are rotatable. The left and right movable support plates 11 are arranged adjacent to each other inside the left and right side frames 1, and their tips are connected to each other by a die support plate 13.
It is possible to rotate up and down around. A top die 15 is fixed to the lower surface of the die support plate 13 in a horizontal state. When the movable support plate 11 is in the lowered position as shown in the figure, the top die 15 faces the bottom die 7 and sandwiches the plate material W to be machined between the bottom die 7 and grips the plate material W to move the movable support plate 11 When it is in the ascending position which is rotated clockwise in FIGS. 1 and 2 from the descending position as shown in the figure, the gripping of the plate material W is released by moving away from the bottom die 7.

The rotation of the movable support plate 11 between the lowered position and the raised position as described above is performed by a driving means (not shown).

The left and right side frames 1 rotatably support a single eccentric shaft 17 that extends horizontally between the left and right side frames 1 in the lower direction. The eccentric shaft portion 19 of the eccentric shaft 17 is externally fitted to the lower end portions of the left and right eccentric drive plates 21 which are arranged adjacent to the inner sides of the left and right side frames 1 and extend in the vertical direction.

The left and right eccentric drive plates 21 are bend molds 47.
It forms a vertically movable drive member that moves up and down.
Te extends vertically at the rear of the bottom die 7 and the top die 15 (the right in FIG. 1), as is clear from FIG. 1, is provided lower than the bottom die 7. Two upper and lower guide blocks 23, 25 are fixed to the inside of each of the left and right eccentric drive plates 21. Information block 2
Guide rollers 29 attached to the left and right movable plates 27 are engaged with 3 and 25 as bend beams, respectively.

As a result, both the left and right movable plates 27 can move up and down with respect to the eccentric drive plate 21, and the range of this vertical movement is the stopper block 31 fixed to the vertically movable plate 27.
Is abutted against the lower surface of the upper guide block 23 or the upper surface of the lower guide block 25.
The left and right upper and lower movable plates 27 are connected to each other by a die support plate 33 and a contact plate support plate 35, and this connection body is defined by the fluid pressure cylinder device 39 attached to the eccentric drive plate 21 by the bracket 37 as described above. It is driven vertically up and down within the range, and selectively positioned at either one of the ascending position shown in FIG. 2 and the descending position shown in FIG.

The eccentric drive plate 21, the vertically movable plate 27, the die support plate 33, and the backing plate support plate 35 are urged to the right as viewed in FIGS. 1 and 2 by a spring (not shown) to drive the eccentric drive. An eccentric shaft portion from a pressure roller 41 that abuts against the plate 21 and a backup roller 45 that abuts against a backing plate 43 fixed to a backing plate supporting plate 35 that is movable in the left-right direction as viewed in FIGS. The rotation around 19 is restricted, and these rollers 41, 4 are rotated as the eccentric shaft 17 rotates.
It is designed so that it can be moved in the vertical direction by being guided by 5.

A bend die 47 is attached to the die support plate 33 in a horizontal state. The bend die 47 is integrally provided with a forward bending portion 49 for performing a forward bending on the upper side and a reverse bending portion 51 for performing a reverse bending on the lower side, respectively. The forward bending portion 49 and the reverse bending portion 51 have the same shape. A recess is formed between them as shown in FIGS.

The backup roller 45 is rotatably supported by a roller bracket 53, and the roller bracket 5
The fixed support member 55 is movably supported in the left-right direction in FIGS. 1 and 2, that is, in the direction in which the bottom die 7 and the top die 15 are brought into contact with and separated from each other. The rear surface (right surface in FIGS. 1 and 2) of the roller bracket 53 is a vertically inclined surface 57, and the inclined cam surface 61 of the cam block 59 is slidably engaged with the inclined surface 57. There is. A feed screw 63 is screw-engaged with the cam block 59, and the cam block 59 moves up and down by the rotation of the feed screw 63.
The position of the roller bracket 53 in the left-right direction in FIGS. 1 and 2, in other words, the backup action position of the backup roller 45 with respect to the connection body is variably set.

The feed screw 63 is drivingly connected to an electric motor 69 by gears 65 and 67, and is driven to rotate forward and backward by the electric motor 69. The drive of the electric motor 69 may be performed by a general electric control device.
The drive control of 9 is such that the bending die 47 is bent in synchronization with the vertical movement of the eccentric drive plate 21 by the rotation of the eccentric shaft 17 so that the bend die 47 moves with a locus required for the required bending of the plate W. It is performed at a predetermined ratio according to.

In the plate material bending machine having the above-mentioned structure, when performing the normal bending, as shown in FIG.
First, the fluid pressure cylinder device 39 is used to move the vertically movable plate 27 and the die support plate 33 and the backing plate support plate 3 connected thereto.
5 is placed in the lowered position, and the eccentric drive plate 21 is placed in the most lowered position. As a result, the positive bending portion 4 of the bend die 47 is
9 is to perform a positive bending to <br/> work W that will be gripped by the bottom die 7 and the top die 15, will be located in a predetermined initial position. In this state, the bend die 47
Position the plate W by projecting the plate W by the required length to the upper position
Make a decision.

Next , the bottom die 7 and the top die 15 are used.
After gripping the plate member W, the eccentric shaft 17 is rotated clockwise from the state shown in FIG. 1, the electric motor 69 is driven in synchronization with this, and the backup roller 45 is rotated by the rotation of the eccentric shaft 17. The eccentric drive plate 21 moves forward at a predetermined ratio with respect to the rising amount, that is, the bottom die 7 and the top die 15
Move in the direction of approaching. This allows the bend die 47
Moves with a curved trajectory that goes to the upper left as seen in FIG.
Due to this movement, the plate material W in which the forward bending portion 49 of the bend die 47 is held by the bottom die 7 and the top die 15
Then, a predetermined positive bending is performed.

On the other hand, when reverse bending is performed, as shown in FIG. 2, first, the fluid pressure cylinder device 39 is used to move the vertically movable plate 27 and the die support plate 33 connected thereto.
Then, the contact plate support plate 35 is placed in the raised position, and the eccentric drive plate 21 is placed in the most raised position. As a result, the reverse bending portion 51 of the bend die 47 becomes the bottom die 7 and the top die 1.
Reverse bending should be applied to the plate material W gripped by
It comes to be located at a predetermined initial position.

Next, the eccentric shaft 17 is rotated counterclockwise from the state shown in FIG. 2, the motor 69 is driven in synchronization with this, and the backup roller 45 is moved to the eccentric shaft 1.
The eccentric drive plate 21 is moved forward at a predetermined ratio with respect to the descending amount of the eccentric drive plate 21 due to the rotation of 7, that is, the bottom die 7 and the top die 15 are moved toward each other. This allows the bend die 47
Moves with a curved locus that advances to the lower left as seen in FIG.
By this movement, the reverse positive bending portion 51 of the bend die 47 performs a predetermined reverse bending on the plate material W held by the bottom die 7 and the top die 15.

Although the present invention has been described above in detail with reference to specific embodiments, the present invention is not limited to these embodiments, and various embodiments are possible within the scope of the present invention. It will be apparent to those skilled in the art.

[0024]

As can be understood from the above description of the embodiments, the invention according to claim 1 is located above the lower fixed table (3) supporting the bottom die (7) and is located above the bottom die (7). A die support plate (13) supporting a top die (15) capable of gripping a plate material (W) is provided between the and, so as to be vertically movable, and the bottom die (7) and the top die (15) are provided.
Folding the positive bend (49) and downward for bending the projecting portion in the direction upward direction after the gripped plate material (W) to
In a plate material bending machine provided with a bend die (47) vertically spaced apart from each other for reverse bending (51) for vertical movement, a drive plate (2) provided so as to be vertically movable and movable back and forth.
1), provided before and after rotatably at a predetermined ratio to vertical movement amount, provided before Symbol bend die to the drive plate (21) and (47) freely vertical positioning Rutotomoni, said bend die (4
7) The positive bending part (49) is placed on the reverse bending part (51).
Provided on one side, and the above-mentioned forward bending portion (49) and reverse bending portion (5
Since the concave part is formed between 1) and
When bending, the plate is placed over the forward bend
Yes, it can be increased without limiting the rising part of the bend
It is something. Also, bending considering springback
It is possible to perform the buffing process and further improve the accuracy.
It

Further , with the above structure, the forward bending portion and the reverse bending portion can be quickly positioned with respect to the plate material before the bending of the plate material is started, and the bending process of the plate material thereafter allows the drive plate to be delicately controlled. Therefore, accurate bending can be performed efficiently.

[0026]

[Brief description of drawings]

FIG. 1 is a side view showing a plate material bending machine according to the present invention when a positive bending operation is performed.

FIG. 2 is a side view showing the plate bending machine according to the present invention when a reverse bending operation is performed.

FIG. 3 is a front view of the plate bending machine according to the present invention.

[Explanation of symbols]

1 side frame 3 Lower fixed table 7 Bottom die 11 Movable support plate 13 Die support plate 15 Top die 17 Eccentric shaft 19 Eccentric shaft 21 Eccentric drive plate 27 Up and down movable plate 33 die support plate 35 Support plate Support plate 41 Pressure roller 45 backup roller 47 Bend Mold 49 Forward bend 51 Reverse Bend 53 Roller bracket 59 Cam Block 63 lead screw

Claims (2)

(57) [Claims] 1. A die support which supports a top die (15) which is capable of gripping a plate material (W) between the bottom die (7) and a lower fixed table (3) which supports the bottom die (7). provided a plate (13) vertically movable, the bottom die (7) and the positive bending portion for bending the projecting portion upwards towards the rearward direction of the top die (15) to the gripped plate material (W) (49 ) And a reverse bending part (51) for bending downward, and a bend die (47) provided vertically separated from each other, in a plate bending machine capable of moving up and down and back and forth. The drive plate (21) provided is provided so as to be movable back and forth at a predetermined ratio with respect to the vertical movement amount.
1) Before Symbol bend die (47) for vertical positioning freely set <br/> only Rutotomoni, it said in the bend die (47) positive songs
A barb (49) is provided above the reverse bend (51),
Between the positive bending portion (49) and the reverse bending portion (51).
A plate bending machine, characterized in that it is formed by forming parts . 2. A lower fixed table supporting a bottom die (7).
The bottom die (7) above the cable (3).
Supports the top die (15) that can hold the plate (W) between
The die supporting plate (13) is provided so as to be movable up and down,
A plate material held by the mudai (7) and the top die (15)
(W) For bending the rearward protruding portion upward
Forward bending portion (49) and reverse bending portion for bending downward
Bend die (47) with (51) vertically separated
In the plate material bending machine that is vertically movable, the bend
The forward bending portion (49) of the mold (47) is reversely bent.
It is provided above the barb (51) and the forward bending part (4
9) and the reverse bending portion (51) are formed with a concave portion,
And a vertically movable drive that supports the bend die (47).
The moving member (21) is provided lower than the bottom die (7).
A plate bending machine characterized by the presence of