JP3795625B2 - Plate bending machine - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a plate material bending machine, and more particularly to a plate material bending machine capable of performing a special bending process.
[0002]
[Prior art]
Referring to FIG. 12, in the conventional plate bending machine 101, the upper presser mold 105 mounted on the lower part of the upper frame 103 and the lower presser mold 109 mounted on the upper part of the lower frame 107 are used. The plate material W is clamped, and the plate material W is bent by the vertical movement of the bending mold 111.
[0003]
The bending operation by the bending mold 111 is already known as described in, for example, Japanese Patent Laid-Open No. 4-37419, and the description thereof will be omitted.
[0004]
[Problems to be solved by the invention]
However, in the plate bending machine 101 as shown in FIG. 12, the workpiece W interferes with the upper presser die 105 when the flange width B increases as shown in FIG. Therefore, there is a problem that it cannot be bent.
[0005]
In order to solve this problem, it is conceivable to make the tip portion 115 of the upper presser mold 113 longer than the flange width B as shown in FIG. Have certain restrictions. That is, if the tip portion 115 of the upper presser mold 113 is lengthened, there is a problem that the strength of the plate presser becomes weak and the plate thickness and material are restricted.
[0006]
Alternatively, when it is desired to bend the plate material W into a shape as shown in FIG. 15, the bending is performed using a special shape upper presser die 117. In this case, other shapes are used. Since it is not suitable for the bending process, there is no diversity and it is economically disadvantageous.
[0007]
Furthermore, when performing circular bending as shown in FIG. 16, the obtuse angle bending is repeated many times using a normal upper presser mold 105 (see FIG. 12), and then gradually bent into a circular shape. Therefore, there exists a problem that processing time becomes long. In order to solve this problem, it is conceivable to increase the radius R of the distal end portion 121 of the upper presser die 119. However, in this case, there is a problem that bending processing with a small radius cannot be performed.
[0008]
The object of the present invention has been made by paying attention to the conventional techniques as described above. In addition to performing general-purpose bending processing on various thicknesses and materials, special bending processing is also performed. An object of the present invention is to provide a plate bending machine that can be used.
[0009]
[Means for Solving the Problems]
According to the first aspect of the present invention, the plate material is clamped by the cooperation of the upper presser die of the upper frame and the lower presser die of the lower frame, which are opened and closed relatively, and is bent into the plate material by the movement of the bending die. A plate bending machine for processing, wherein the second presser is provided on the front surface of the upper frame and / or the front surface of the lower frame and below the upper presser die and / or above the lower presser die. A second presser die device for setting and retracting the die is provided , and the second presser die device includes a second presser die holder to which the second presser die is attached, and the die holder in a substantially horizontal plane. A pair of rotary shafts that are held to pivot in the front-rear direction, a second plate presser frame that holds the rotary shaft rotatably and can move up and down, and a vertical drive cylinder that moves the second plate presser frame up and down The rotation A plate member comprising: a gear attached to the gear; a rack that meshes with the gear to rotate the rotating shaft; and a revolving drive cylinder that reciprocates the rack to revolve the mold holder in the front-rear direction. It is a bending machine.
[0010]
Therefore, when the plate material is clamped by the cooperation of the upper presser die and the lower presser die by closing the upper frame relative to the lower frame, the upper frame is provided on the front surface of the upper frame and / or the lower frame. The second presser mold having the desired shape by the second presser mold device is set on the lower side of the upper presser mold and / or the upper side of the lower presser mold, and the plate material is clamped. Bend.
[0014]
The vertical drive cylinder moves the second plate presser frame up and down, and the swing drive cylinder reciprocates the rack to rotate the gear that meshes with the rack, thereby rotating the rotary shaft and mounting it on this rotary shaft. The second presser mold holder thus made is turned in the front-rear direction to move the second presser mold to the lower side of the upper presser mold and / or the upper side of the lower presser mold.
[0021]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
[0022]
FIG. 1 shows a plate bending machine 1 according to the present invention. In this plate material bending machine 1, the front portion of the upper frame 7 is opened and closed by a drive mechanism (not shown) around the lower frame 3 and the hinge 5 provided at the upper rear end of the lower frame 3. Is.
[0023]
A lower presser die 9 that supports the workpiece W from below is attached to the upper front end portion of the lower frame 3. An upper presser die 11 for pressing the work W from above is attached to the lower end portion of the front surface of the upper frame 7. Therefore, by opening and closing the upper frame 7, the workpiece W is clamped by the cooperation of the upper presser die 11 of the upper frame 7 and the lower presser die 9 of the lower frame 3.
[0024]
On the other hand, a bending die 13 for bending the workpiece W clamped by the upper presser die 11 and the lower presser die 9 is provided behind the upper frame 7 and the lower frame 3 (right direction in FIG. 1). It is provided so as to be movable up and down and front and rear in a predetermined direction by a driving device (not shown).
[0025]
Left and right second presser mold devices 15L and 15R are respectively provided on the left and right sides (front and rear in the direction orthogonal to the paper surface in FIG. 1) of the upper frame 7 for special folding. The second presser mold devices 15L and 15R provided on the left and right sides are completely symmetrical. Therefore, in the following, the second presser mold device 15L on the right side (hereinafter simply referred to as the second presser mold device 15). ) Will be described.
[0026]
2 to 4, the second presser die device 15 is provided on the front surface of the upper frame 7 through the support member 17 so as to protrude forward (to the left in FIG. 1). Yes. A pair of brackets 19 are attached to the front surface of the support member 17, and a base plate 21 is provided on the brackets 19 in the horizontal direction. A vertical drive cylinder 23 as a vertical movement drive mechanism is attached to the base plate 21 at a central portion in the left-right direction in FIG.
[0027]
The vertical drive cylinder 23 is attached with the piston rod 25 facing downward, and a second plate holding frame 27 is attached to the lower end of the piston rod 25. The second plate presser frame 27 includes a horizontal lower support arm 29 attached to the lower end portion of the piston rod 25, and vertical left and right column members 31L and 31R connected by the lower support arm 29. And an upper support arm 33 that connects the vicinity of the upper end portions of the column members 31L and 31R.
[0028]
Referring to FIG. 3, a turning drive cylinder 35 as a front and rear drive mechanism is provided in the horizontal direction on the front surface of the upper support arm 33, and a bracket 39 is attached to the tip of the piston rod 37 of the turning drive cylinder 35. It is attached to the rack 41 via. The rack 41 is provided at the upper ends of the left and right column members 31L and 31R so as to be movable in the left-right direction (horizontal direction) in FIG.
[0029]
Further, on the rear side of the rack 41 (the side facing the paper surface in FIG. 2), left and right small gears 43L and 43R meshing with the rack 41 are rotatably provided. Each of the small gears 43L and 43R is provided with a rotary drive shaft 45 extending downward, and a second plate as a second presser die holder is provided at each lower end portion of the rotary drive shaft 45 via a parallel link 47. A presser mounting plate 49 is provided. A second presser die 51 having a predetermined length is attached to the vicinity of the left end of the second plate presser mounting plate 49 in FIG. 2 (the right end in the left second presser die device 15L). Yes. The second presser die 51 is attached so as to be exchangeable with various shapes according to the contents of the special bending process.
[0030]
Accordingly, the second plate presser frame 27 is movable up and down relatively with respect to the front surface of the upper frame 7 by the action of the vertical drive cylinder 23, and the second plate presser mounting plate 49 is operated by the turning drive cylinder 35. Thus, the second plate presser frame 27 is movable in the front-rear direction. For this reason, the second presser die 51 is movable in the vertical direction and the front-rear direction by the action of the vertical drive cylinder 23 and the turning drive cylinder 35. The state shown in FIGS. 2 to 4 shows a state in which the second presser die 51 is set on the lower side of the upper presser die 11.
[0031]
Referring to FIG. 5, a protrusion 53 as a locking portion is provided on the upper surface of the second plate presser mounting plate 49 above the second presser die 51. It is configured to be fitted and positioned in a fitting groove 55 as a provided positioning portion.
[0032]
Next, a procedure for setting the above-mentioned second presser mold 51 on the lower side of the upper presser mold 11 will be described with reference to FIGS.
[0033]
First, when performing a general bending process, as shown in FIG. 6, the bending process is performed using only the upper presser mold 11 and the lower presser mold 9. Thus, the second presser mold 51 is moved forward, and the second plate presser frame 27 is moved up by the vertical drive cylinder 23 and retracted to a position that does not interfere with the work.
[0034]
Next, when the second presser mold 51 is set below the upper presser mold 11, the second plate presser frame 27 is lowered by the vertical drive cylinder 23 as shown in FIG. The second presser mold 51 is positioned below the upper presser mold 11. Subsequently, as shown in FIG. 8, the turning drive cylinder 35 (see FIG. 2) is driven to turn the second presser die 51 by the action of the rack 41 and the small gear 43, and the upper presser die 11. Move directly below.
[0035]
Subsequently, referring to FIG. 9, the vertical drive cylinder 23 is slightly raised, and the protrusion 53 provided on the upper surface of the second presser die 51 is fitted on the bottom surface of the upper presser die 11. The second presser mold 51 is positioned by fitting in the groove 55 (see FIG. 5).
[0036]
Thus, the second presser mold 51 is set on the lower side of the upper presser mold 11. Although illustration is omitted, since the left and right second presser dies 51 are continuously set in this state, the upper frame 7 is closed downward as shown in FIG. 9 and the second presser die 51 are used to clamp the plate material W, and the bending die 13 is used to perform a desired bending process on the plate material W.
[0037]
From the above results, the second presser die 51 having a special shape can be easily attached to the lower side of the upper presser die 11 when necessary, so that the upper presser die in addition to the normal bending process. Thus, it becomes possible to perform a special bending process that could not be performed using 11. In addition, by replacing the second presser mold 51 with various shapes, the processing capability can be greatly increased.
[0038]
In addition, since the left and right second presser molds 51 are connected by the left and right second presser mold apparatuses 15L and 15R, special processing can be performed even on a wide workpiece W.
[0039]
The present invention is not limited to the above-described embodiment, and can be implemented in other modes by making appropriate modifications. That is, in the above-described embodiment, the second presser frame 27 having the second presser mold 51 is moved up and down by the vertical drive cylinder 23 and the second presser mold 51 is turned by the turning drive cylinder 35 and set. However, like the plate material bending machine 57 shown in FIG. 11, an L-shaped support member 59 having a predetermined length with the second presser mold 51 attached to the tip is attached to the upper frame 7. The lower presser die 11 is lowered by pivotally supporting the hinge 61 provided on the front surface so as to be pivotable and by rotating the support member 59 downward when the second presser die 51 is used. You may make it set to.
[0040]
In the above-described embodiment, the second presser mold device 15 for setting the second presser mold 51 on the lower side of the upper presser mold 11 is provided on the front surface of the upper frame 7. Alternatively, in addition to this, it is also possible to provide a second presser mold device for setting the second presser mold on the upper side of the lower presser mold 9 on the front surface of the lower frame 3.
[0041]
【The invention's effect】
As described above, in the plate bending machine according to the first aspect of the present invention, the second presser die having a desired shape by the second presser die device provided on the front surface of the upper frame and / or the lower frame. Is placed on the lower side of the upper presser die and / or the upper side of the lower presser die, the plate material is clamped, and the plate material is bent by the bending die. In addition to general-purpose bending, special bending can also be performed.
[0043]
The vertical drive cylinder moves the second plate presser frame up and down, and the swing drive cylinder reciprocates the rack to rotate the gear that meshes with the rack, thereby rotating the rotary shaft and mounting it on this rotary shaft. The second presser mold holder is turned in the front-rear direction to move the second presser mold to the lower side of the upper presser mold and / or the upper side of the lower presser mold. In addition, special processing can be easily performed.
[Brief description of the drawings]
FIG. 1 is a side view showing a plate bending machine according to the present invention.
FIG. 2 is a front view showing a second plate presser die device.
3 is a plan view seen from the direction III-III in FIG. 2;
4 is a side view seen from the VI direction in FIG. 3. FIG.
FIG. 5 is an enlarged view of a portion V in FIG. 4;
FIG. 6 is a step diagram showing a procedure for mounting a second presser mold.
FIG. 7 is a step diagram showing a procedure for mounting a second presser mold.
FIG. 8 is a step diagram showing a procedure for mounting a second presser mold.
FIG. 9 is a step diagram showing a procedure for mounting a second presser mold.
FIG. 10 is a step diagram showing a procedure for mounting a second presser mold.
FIG. 11 is a side view showing another embodiment.
FIG. 12 is a side view showing a conventional bending process.
FIG. 13 is a side view showing a problem in a conventional bending process.
FIG. 14 is a side view showing a special upper presser die.
FIG. 15 is a side view showing a special upper presser die.
FIG. 16 is a side view showing a special upper presser die.
[Explanation of symbols]
1, 57 Plate Material Bending Machine 3 Lower Frame 7 Upper Frame 9 Lower Pressing Die 11 Upper Pressing Die 13 Bending Die 15 Second Pressing Die Device 23 Vertical Drive Cylinder (Vertical Motion Drive Mechanism)
35 Swivel drive cylinder (front / rear drive mechanism)
49 Second plate presser mounting plate (second presser mold holder)
51 Second presser mold 53 Projection (locking part)
55 Fitting groove (positioning part)
W board material

Claims (1)

This is a plate bending machine that clamps the plate by the cooperation of the upper presser mold of the upper frame and the lower presser mold of the lower frame, and folds the plate by moving the bending mold. And a second presser die which is provided on the front surface of the upper frame and / or the front surface of the lower frame and sets and retracts the second presser die below the upper presser die and / or above the lower presser die. A presser die device is provided , and the second presser die device holds the second presser die holder on which the second presser die is mounted and the die holder so that the die holder can be swung back and forth in a substantially horizontal plane. A pair of rotary shafts, a second plate presser frame that holds the rotary shaft rotatably and that can move up and down, a vertical drive cylinder that moves the second plate presser frame up and down, and a gear attached to the rotary shaft When, A plate material bending comprising: a rack that meshes with a gear of the rotary shaft and rotates the rotating shaft; and a revolving drive cylinder that reciprocates the rack to rotate the mold holder in the front-rear direction. Processing machine.

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