JPH0553726U - Plate bending machine - Google Patents

Abstract

(57) [Summary] [Purpose] To reduce the cycle time by allowing the plate to be fed without being obstructed by the open mold while the upper mold is being raised and waited at a sufficiently low height. [Structure] Open dies 18 are attached to both ends of the upper die 8 so as to be freely opened and closed. A chamfered portion 18a is provided on the surface of the opening die 18 in the plate material receiving direction. The upper die 8 is driven up and down, and the lower die 10
The plate member W is sandwiched between the upper and lower molds, and the plate member portions projecting from the upper and lower molds 8 and 10 are end-bent in an L shape by the upward movement of the bending mold. The opening die 18 is used when the lip portion a is already formed on the plate material W, and compensates for the shortage of the width dimension of the upper die 8. With the upper die 8 standing by at a height position slightly elevated from above the lower die 10, the plate material W is horizontally moved and introduced into the processing position. At this time, the tip of the plate W is opened
Since the chamfered portion 18a of 18 is pushed, the plate material W smoothly rotates and rides on the plate material W, and the plate material W can be introduced to the processing position without being obstructed by the opening die 18.

Description

[Detailed description of the device]

[0001]

[Industrial application]

 The present invention relates to a plate material bending machine of a type in which a plate material sandwiched by upper and lower dies is bent by pushing up a bending die.

[0002]

[Prior Art]

 2. Description of the Related Art Conventionally, there is a plate material bending machine in which a plate material is sandwiched between upper and lower dies and a portion of the plate material protruding from the upper and lower dies is pushed up by a bending die to end-bend into an L shape. The plate material is clamped at its center by a plate material rotating device, and is rotated by 90 °, for example, after each piece is processed, and the four sides are sequentially bent.

As such a plate bending machine, there is one in which an open die 41 that opens and closes in the width direction is pivotally supported on both sides of the lower end of an upper die 40, as shown in FIG. 7A. As shown in FIG. 8 (A), the opening die 41 is formed by bending end portions of two opposite sides of a plate material W with a lip portion a formed by bending end portions twice, for example. Used when doing.

That is, in this case, the upper die 40 and the opening die 41 that are narrower than the width M between the lip portions a of the plate material W shown in FIG. Is clamped and the unprocessed side is bent. Until the upper die 40 is pushed down onto the plate material W, the open dies 41 on both sides are maintained at the downward hanging angle as shown in FIG. As shown in FIG. 7 (B), it opens along the upper surface of the plate material W without interfering with. As a result, the plate material W is pressed by the upper die 40 over the entire width of the upper surface thereof, and the subsequent end bending process shown in FIGS. 8B and 8C can be performed accurately.

[0005]

[Problems to be solved by the device]

 However, in the above-mentioned conventional plate material folding machine, when the standby height H (FIG. 7) of the upper mold 40 when feeding the plate material W onto the lower mold 42 in a state where the upper mold 40 is raised and waited, The plate material W fed into 7 (A) as shown by the chain line hits the opening die 41 to prevent the introduction of the plate material W. Therefore, it is necessary to set the standby height H of the upper die 40 to be sufficiently high, which causes a longer stroke for pushing down the upper die 40 and the opening die 41, which requires extra machining time. there were.

An object of the present invention is to provide a plate material folding machine which can hold the upper mold at a sufficiently low height without hindering the feeding of the plate material by the open mold and can improve the cycle time. Is.

[0007]

[Means for Solving the Problems]

 This plate material bending machine is of a type provided with an upper die and a lower die that sandwich the plate materials with each other, and a bending die that is driven up and down to bend the plate materials sandwiched by the upper and lower dies along the upper and lower dies. In the plate material folding machine having such a basic structure, an opening die is provided at the end of the upper die in the width direction so as to be rotatable between a downward hanging angle and an opening angle extending from the upper die in the width direction. The chamfered portion is provided at least at the tip of the surface of the open type plate material in the receiving direction.

[0008]

[Action]

 According to this configuration, when the remaining edges of the plate material having the lip portions already bent on a pair of edges are bent, the following operations can be performed. That is, the plate material is introduced onto the lower mold in a state where the upper mold is raised to a slight height position and is on standby. At this time, the height of the upper mold is low and the plate material hits the surface of the open mold in the plate material receiving direction.Because the chamfered part is provided on that surface, the open mold guides the plate material with the chamfered part. As it enters, it will open smoothly and ride on the plate. Therefore, even if the standby height of the upper die is low, the plate material can be smoothly introduced without being obstructed by the opening die.

[0009]

Embodiment An embodiment of the present invention will be described with reference to FIGS. As shown in FIG. 4, the plate material folding machine 1 includes an upper die 8 that is attached to a ram 7 and is driven up and down, a lower die 10 that is fixed to a body frame 9 of the plate material folding machine 1, and the upper and lower die pieces. The bending die 11 bends the protruding portion W1 of the plate material W sandwiched by 8 and 10 upward. The bending die 11 is attached to the tip of a rocker arm 12, and the rocker arm 12 is connected to three actuators 13 to 15 so that the rocker arm 12 can move in the vertical direction, swing, and move in the front-back direction. The upper die 8 can change the die width L (FIG. 3) by a die width changing mechanism 16 described later.

As shown in FIGS. 1 to 3, support members 17a and 17b are provided on both sides of the lower end of the upper die 8, and an open die 18 is rotatably attached to these support members 17a and 17b. It is pivoted. Each of the opening dies 18 is rotatable between a downward hanging angle shown in FIG. 3 and an opening angle extending from the upper die 8 in the width direction. A chamfered portion 18a is rounded at least at the tip of the surface of the opening die 18 in the plate material receiving direction.

As shown in FIG. 4, the plate material feeding device 2 arranged in front of the plate material folding machine 1 positions the table 3 on which the plate material W is placed and the plate material W on the table 3 in the width direction. A width determining mechanism 4, an origin finding mechanism 5 (FIG. 5) for positioning in the front-rear direction, and a carriage 6 which holds the plate material W 1 and moves back and forth are generally C-shaped. The carriage 6 is installed on the bed 20 via rails (not shown) so as to be movable back and forth, and is driven in the front-back direction by the feed screw 21 and its driving servomotor 22.

At the front end of the carriage 6, a plate material rotating device 23 for indexing and rotating the plate material W at predetermined angles (for example, 90 ° or 180 °) is provided. The plate material rotating device 23 includes a pair of pads 24 and 25 for sandwiching the plate material W on the table 3 from above and below, and a hydraulic motor 26 for rotationally driving the lower pad 25. The upper pad 24 is attached to an elevating holder 28 so as to be able to ascend and descend along a vertical rail 27 provided at the front end of the carriage 6, and is vertically moved by an elevating device 29 such as a cylinder device.

FIG. 5 is a plan view of the plate material feeding device 2. The table 3 has a carriage passage 30 that allows the carriage 6 to pass therethrough, and is composed of a large number of strip-shaped plates 3a, and the positioning claws 4a of the width determining mechanism 4 move left and right from the gap between the strip-shaped plates 3a. It is protruding freely. The origin finding mechanism 5 is composed of a plurality of origin finding pins 5a which can be projected and retracted by a cylinder device (not shown).

In FIG. 1 to FIG. 3, the upper mold 8 is configured by mounting a large number of plate-shaped dividing members 8a on a horizontal shaft 31 so as to be rotatable in a downward posture and a flipping posture, respectively. The split mold member 8a in the downward posture is a posture that acts on the pressing of the plate material during bending, and the arrangement width of the split mold members 8a in the downward posture is the mold width L. The posture of the split mold member 8a is changed by the rotation of the rotation support member 32 that is driven to rotate, and the rotation support member 32 moves along the rail 33 to a mold width changing drive source such as a servo motor (see FIG. It is driven forwards and backwards by a feed screw (not shown) and a feed screw (not shown). The die width is changed under the control of this feeding device. Further, the support members 17a and 17b to which the opening mold 18 is pivotally mounted are also provided parallel to the horizontal shaft 31 and are movable along rails (not shown), and are moved back and forth as the mold width is changed. It

Next, the operation of the above mechanism will be described. The plate material W that has been loaded onto the table 3 and positioned in each of the directions A and B (FIG. 5) is clamped by the plate material rotating device 23 of the carriage 6 and fed into the plate material folding machine 1 by the forward movement of the carriage 6. Be done. The fed plate material W is sandwiched between the upper die 8 and the lower die 10 in FIG. 4, and the portions protruding from the upper and lower dies 8 and 10 are bent upward by the upward movement of the bending die 11. Then, the upper die 8 is raised, the carriage 6 is retracted, the plate material W is rotated by 90 °, for example, and then the plate material W is fed again to the plate material folding machine 1. By repeating such an operation, the edge of only four sides of the plate material W or necessary edges are bent.

As shown in FIG. 8 in the description of the conventional example, the remaining two sides of the plate material W in which the bent portions with the lip portions a are formed by repeating the end bending process at least two times on both sides facing each other. When end bending is performed, the steps shown in FIG. 6 are performed. First, as shown in the front view of FIG. 6 (A) and the side view of FIG. 6 (B), the total width dimension of the upper die 8 and the open dies 8 on both sides is approximately the unprocessed side of the plate W. The width L of the upper die 8 is set so as to correspond to the entire width, and the open dies 18 on both sides are set to have a downward hanging angle so that the height is located slightly above the thickness of the plate material W introduced onto the lower die 10. Raise it to H and let it stand by. At this time, since the standby height H of the upper die 8 is low, the open dies 18 on both sides of the upper die 8 are in contact with the lower die 10.

Under this state, the plate material W is introduced onto the lower mold 10 from the table 3 of the plate material feeding device 2. At this time, the tip of the plate material W abuts on the chamfered portion 18a which is R-processed at the tip of the surface of the opening die 18 in the plate material receiving direction. Then, when the plate material W is further introduced, as shown in the front view of FIG. 6C and the side view of FIG. 6D, the opening die 18 is pushed by the plate material W, and is moved from the upper die 8 in the width direction. Rotate to the open angle that extends to and climb onto the plate W. This operation is smoothly performed by the guide action of the chamfered portion 18a formed on the opening die 18. That is, even if the plate material W is introduced onto the lower mold 10 while the upper mold 8 is on standby at a height at which the opening mold 18 comes into contact with the lower mold 10, the opening mold 18 prevents the introduction of the plate material W. do not become.

When the plate material W is moved to the processing position, the upper die 8 is lowered and pressed onto the plate material W, whereby the plate material W and the open die 18 and the lower die 18 are protruded with the unmachined side protruding. It is sandwiched with the mold 10. Under this sandwiched state, the bending of the unprocessed side by the bending die 11 is performed as described above.

When the above end bending process is completed, the upper mold 8 is raised and retracted to a height position where the opening mold 18 is completely removed from between the lip portions a of the plate material W. After that, the plate material W is retracted to the table 3 of the plate material feeding device 2, rotated by 180 ° here, and then the plate material W is moved to the processing position again, and end bending is performed on the remaining unmachined side.

In the above embodiment, the chamfered portion 18a of the opening die 18 is formed into a curved surface having an arcuate cross section, but it may be formed into a flat inclined surface. Further, in the above-described embodiment, an example in which the opening die 18 is provided on the upper die 8 whose die width can be changed is shown. However, the opening die 18 having the above-mentioned configuration may be provided for the upper die having an integral shape. Good.

[0021]

[Effect of the device]

 This invention includes an upper die and a lower die that sandwich a plate material, a bending die that is driven up and down to bend the plate material that is sandwiched between the upper and lower dies along the upper and lower dies, and is attached to the widthwise end of the upper die. In a plate bending machine provided with a rotatable open mold between a downward hanging angle and an open angle extending from the upper mold in the width direction, at least the surface of the open mold in the plate material receiving direction. Since the chamfered part is provided at the tip, the plate material can be introduced to the processing position without being obstructed by the opening mold while the upper mold is kept in a standby position at a slight height. Therefore, the lowering time for lowering the upper die for pinching the plate material is shortened, and the cycle time can be shortened accordingly.

[Brief description of drawings]

FIG. 1 is a perspective view showing the vicinity of an upper die of a plate bending machine according to an embodiment of the present invention.

FIG. 2 is a side view showing the vicinity of the upper and lower dies of the plate material folding machine.

FIG. 3 is a front view showing the vicinity of the upper die of the plate bending machine.

FIG. 4 is a cutaway side view including a plate material feeding device of the plate material folding machine.

FIG. 5 is a plan view of the plate material feeding device.

FIG. 6 is an operation explanatory view of the plate material folding machine of the embodiment.

FIG. 7 is an operation explanatory view of a conventional plate bending machine.

FIG. 8 is an explanatory diagram showing an example of edge bending of a plate material.

[Explanation of symbols]

1 ... Plate material folding machine, 2 ... Plate material feeding device, 3 ... Table, 6
... Carriage, 8 ... Upper mold, 10 ... Lower mold, 11 ... Bending mold, 18 ...
Open type, 18a ... Chamfer, W ... Plate

Claims (1)

[Scope of utility model registration request] 1. An upper die and a lower die that sandwich a plate member, a bending die that is driven up and down to bend the plate member that is sandwiched between the upper and lower dies along the upper and lower dies, and is attached to an end portion in the width direction of the upper die. Provided with a downward opening angle and an opening die rotatable between an opening angle extending in the width direction from the upper die,
A plate material folding machine in which a chamfered portion is provided at least at the tip of the opening type plate material receiving direction.