JP3199520B2 - Are bending machine - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a radius bending machine for bending a plate in manufacturing a square duct.

[0002]

2. Description of the Related Art Conventionally, when an S-shaped square duct 1 is manufactured as shown in FIG. 4 is cut into a rectangular shape. After that, gouge processing is performed on both left and right ends, and flange portions 5 are formed on the front and rear ends. Next, the upper plate 3 and the lower plate 4 are passed through a three-axis roller bending machine to visually bend while adjusting the bending radiuses R ₁ and R ₂ , and then to the side plates 2 and 2 to form a square duct. 1 was being manufactured.

[0003] However, since the worker performs the bending work visually by relying on intuition with a three-axis roller bending machine, skill is required, and the bending directions of the bending radiuses R ₁ and R ₂ are opposite. after bending radius R ₁ moiety, once,
Is inverted from removed from the bending machine on the workability is poor because of bending the radius R ₂ moiety, low dimensional accuracy, there has been a processing cost becomes high problem. When bending is performed by a three-axis roller bending machine, the side plate 2, the upper plate 3, the lower plate 4
Since the goby parts formed on both edges of the crusher were crushed, they had to be corrected after bending.

[0004]

SUMMARY OF THE INVENTION The present invention eliminates the above-mentioned drawbacks, and feeds a sheet material between rollers to continuously bend an R-shaped portion having an arbitrary radius and bending direction, such as an S-shaped bend. An object of the present invention is to provide a radius bending machine which prevents crushing of a part, improves workability and dimensional accuracy, and significantly reduces processing cost.

[0005]

According to the first aspect of the present invention, an upper fixed roller and an upper movable roller are spaced from each other, and both ends thereof are connected by an arm.
Attaching a rotating shaft located on the same straight line as the part fixing roller
By adjusting the rotation angle of this rotation axis,
Connect the rotating means to adjust the position of the upper movable roller,
Below the upper fixed roller, a sliding contact is provided.
Between the lower fixed roller and the lower movable roller
Then, connect both ends with an arm, and
Attach a rotating shaft located on the same straight line as the fixed roller,
By adjusting the rotation angle of this rotation axis,
A rotating means for adjusting the position of the movable roller is connected, and the upper fixed roller and the lower fixed roller are connected to a motor.

Further, according to a second aspect of the present invention, an upper fixed row is provided.
Arm that connects the upper movable roller with the roller
Attach the rotating shaft, which is supported by
Arm that connects the roller and lower movable roller
Attach the rotating shaft to the lower frame
An upper frame is rotatably supported on the frame.

Further, the invention according to claim 3 is the above-mentioned round bending machine, wherein the upper fixed roller, the upper movable roller,
A plurality of annular grooves are formed on the outer periphery of the lower fixed roller and the lower movable roller at intervals in the longitudinal direction to allow the goby portion to escape.

[0008]

When the plate is bent into an S-shape by the radius bending machine of the present invention, the cut plate is fed between an upper fixed roller and a lower fixed roller driven by a motor and sandwiched.
On the other hand, the upper movable roller connected to the upper fixed roller by an arm is rotated about the axis of the upper fixed roller by a cylinder or a motor, and the upper movable roller and the lower movable roller are horizontally arranged. On the other hand, the lower movable roller connected to the lower fixed roller by the arm is rotated about the axis of the lower fixed roller as a center of rotation, the lower fixed roller and the lower movable roller are horizontally arranged, and the upper and lower rollers are plate materials. Proceeds linearly.

When the plate material is sent to the position where the bending radius is formed, the arm is rotated by a cylinder or a motor, and the upper movable roller supported here rotates upward about the upper fixed roller. On the other hand, the lower arm also rotates around the axis of the lower fixed roller, and the lower movable roller attached here rises, and the plate material moves upward between the three axes of the upper fixed roller, the lower fixed roller, and the lower movable roller. Can be bent.

In this way, when the plate material advances while being bent and is sent to a position where a bent bend is formed in the opposite direction, the arm rotates and the upper movable roller supported by the arm rotates the upper fixed roller. It rotates around the center and descends. On the other hand, the lower arm pivots downward around the axis of the lower fixed roller, and the lower movable roller attached here descends, and moves downward between the three axes of the upper fixed roller, the upper movable roller, and the lower fixed roller. Can be bent. Therefore, by changing the relative positional relationship between the upper fixed roller and the upper movable roller connected by the upper arm and the lower fixed roller and the lower movable roller connected by the lower arm, the radius portion of an arbitrary radius and bending direction is changed. Can be formed continuously.

According to the second aspect of the present invention, the upper frame is rotatably supported by a rotating shaft rotatably supporting an arm connecting the upper fixed roller and the upper movable roller to the upper frame. By passing the plate material with the flanges formed at the front and rear ends between the upper and lower rollers, the upper frame pivots around the axis,
The upper fixed roller and the upper movable roller attached to the upper fixed roller via the arm rise, and a gap is formed between the upper fixed roller and the lower fixed roller. After passing the flange at the tip through this gap, lower the upper frame and place a plate between the upper and lower rollers.
Bending is performed after sandwiching the material .

According to the third aspect of the present invention, a plurality of annular grooves are formed at predetermined intervals along the longitudinal direction of the upper fixed roller and the upper movable roller, the lower fixed roller, and the lower movable roller. When the portion is inserted into the annular groove and rolled, it can be bent at a predetermined radius without crushing the goby portion.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below in detail with reference to FIGS. In FIG. 1, reference numeral 6 denotes a stand. Two lower frames 7, 7 are mounted on the left and right upper portions of the stand 6 at intervals, as shown in FIG. Further, two upper frames 8, 8 are attached to this upper part at an interval. As shown in FIG. 2, a bearing mounting plate 11 is joined to the upper part of the stand 6 on the entry side of the plate material 10, and a lower bearing 12a and an upper bearing 12b are provided here.
The end of a shaft 13a passing through the lower frames 7, 7 is supported by a, and the end of a shaft 13b passing through the upper frames 8, 8 is supported by an upper bearing 12b.

As shown in FIG. 1, a sprocket 14a is attached to an end protruding outside the right shaft 13a of the apparatus, and a sprocket 15a is attached to an inner end as shown in FIG. Have been. The sprocket 14a is mounted on a motor 17 as shown in FIG.
b through a chain 16 so that the shaft 13a is rotated by the rotation of the motor 17. Also this shaft 13
As shown in FIG. 2, a gear 18a is mounted between the lower frames 7, 7 in the middle of the shaft a, and meshes with a gear 18b mounted between the upper frames 8, 8 in the middle of the upper shaft 13b. The rotational force of the shaft 13a is transmitted to the upper shaft 13b.

As shown in FIG. 5, a sprocket 19a is mounted on the inner end of the upper shaft 13b. Further, an upper fixed roller 20 and an upper movable roller 21 are provided at the distal end side of the upper frames 8, 8 at an interval.
As shown in FIG. 3, both ends of the upper fixed roller 20 and the upper movable roller 21 are supported by bearings 24, 24 attached to an arm 23 at intervals. One end of a rotating shaft 26 is fixed to the side surface of the arm 23 on the upper frame 8 side by welding on the same straight line as the upper fixed roller 20.

The upper frame 8 through which the rotating shaft 26 passes,
A gear 28a is mounted between the gears 8, and further meshes with a large-diameter gear 28b provided above the gear 28 to rotate. A link 30 is fixed to a side surface of the large-diameter gear 28b, and an upper end thereof is rotatably connected to a tip of a cylinder 31. The link 30 is rotated by expansion and contraction of the cylinder 31, and the gear 28b connected to the link 30 is rotated. When the gear 28a also rotates integrally, the gear 28a meshing with the gear 28a rotates. The amount of expansion and contraction of the cylinder 31 is controlled according to the bending radius of the plate material 10.

[0017] the right of the upper fixing roller 20 and the upper movable roller 21, one end of the rotating shaft 26 to A over arm 23 as shown in FIG. 5 are fixed by welding, a gear 28a attached here
This meshes with a large-diameter gear 28b provided at the upper portion, and a link 30 connected to this side surface is rotatably connected to the tip of the cylinder 31. Also, the lower frame 7, 7
As shown in FIG. 4, a lower fixed roller 33 and a lower movable roller 34 are also provided at the leading end of the roller, and both ends are rotatably supported by the same structure as the upper fixed roller 20 and the upper movable roller 21. .

A sprocket 19b is mounted on the right end of the upper fixed roller 20, as shown in FIG. 5, and is connected to the sprocket 19a mounted on the shaft 13b by a chain 16. A sprocket 36a is mounted coaxially with the sprocket 19b. The sprocket 36a is connected to the sprocket 36b mounted on the right end of the upper movable roller 21 by a chain 16, and the upper fixed roller 20 and the upper movable roller 21 are rotated by the rotation of the motor 17. It is designed to rotate. A sprocket 15b is mounted on the lower fixed roller 33 as shown in FIG.
And a lower movable roller
34 is also connected by the chain 16 and rotates.

The upper fixed roller 20, the upper movable roller 21, the lower fixed roller 33, and the lower movable roller 34
A plurality of annular grooves 37 are respectively formed at predetermined intervals along the longitudinal direction, and the goby portion is made to escape by the annular groove 37. As shown in FIG. 1, a rising frame 38 is connected to the bottom of the upper frames 8 and 8 on the roller side, and the tip of a cylinder 39 is connected to the center of the bottom. Then, the upper frames 8, 8 rotate upward with the shaft 13b as a fulcrum, and the upper fixed roller 20 and the upper movable roller 21 rise to escape the flange portion 5 of the plate material 10. In FIG. 2, reference numeral 40 denotes a table for guiding the plate 10.

A method of bending the upper plate 3 shown in FIG. 9 by the above-described radius bending machine will be described. When the plate material 10 is bent into an S-shape, gouge processing is performed on the left and right ends of the plate material 10 cut into a rectangular shape, and flange portions 5 are formed at the front and rear ends. Next, put the plate material 10 on the table 40,
When the cylinder 39 shown in FIG. 1 is extended, the ascending frame 38 connected to this end rises, and the upper frames 8, 8 on both sides connected thereto rotate upward with the shaft 13b as a fulcrum. Upper fixed roller 20 mounted via arm 23
And the upper movable roller 21 rises, and the lower fixed roller 33
There is a gap between The flange portion 5 at the tip is passed through this gap, and the goby bending portion is
After matching with the annular groove 37 of the 33, the cylinder 39 is contracted to lower the upper frames 8, 8, and the plate material 10 is sandwiched between the upper fixed roller 20 and the lower fixed roller 33.

Thereafter, when the motor 17 is driven, FIG.
As shown in FIG. 7, the sprocket 14b attached here rotates, and the sprocket 14a attached to the lower shaft 13a via the chain 16 rotates. As shown in FIG. 2, the rotation of the shaft 13a causes the sprocket 15a attached thereto to rotate, and the sprocket 15b attached to the lower fixed roller 33 to rotate. On the other hand, the rotation of the gear 18a mounted between the lower frames 7, 7 in the middle of the shaft 13a rotates the gear 18b mounted between the upper frames 8, 8 in the middle of the upper shaft 13b. As a result, the sprocket 19a of the shaft 13b rotates as shown in FIG.
The upper fixed roller 20 is transmitted to the sprocket 19b attached to the upper roller, and the upper movable roller 21 is further rotated by the sprockets 36a and 36b. Therefore, the plate member 10 sandwiched between the rotating lower fixed roller 33 and the upper fixed roller 20 is sent forward.

As shown in FIG. 2, when the upper and lower cylinders 31, 31 are simultaneously contracted by a predetermined amount, the large-diameter gear 28b connected to the link 30 rotates to engage with the small-diameter gear 28b. Gear 28a also rotates. As shown in FIG. 3, the rotating shaft 26 to which the gear 28a is attached is fixed to the side surface of the arm 23 by welding on the same straight line as the upper fixed roller 20, so that the arm 23 is centered on the axis of the upper fixed roller 20. The upper movable roller 21 attached thereto is rotated leftward in the figure, and the upper fixed roller 20 and the upper movable roller 21 are horizontally arranged as shown in FIG.
Similarly, when the lower cylinder 31 contracts, the arm 23 rotates about the axis of the lower fixed roller 33, and the lower movable roller 34 attached thereto rotates rightward in the drawing, and as shown in FIG.
As shown in the lower fixed roller 33 and lower movable roller 34
Are horizontally arranged, and the plate member 10 is sandwiched between the upper movable roller 21 and the lower movable roller 34 and advances linearly.

[0023] bending plate 10 in a position to form a radius R ₁ is sent, arrow top of the cylinder 31 by out Shin, gear 28b of a large diameter so connected to the link 30 as shown in FIG. 3 The arm 23 rotates in the direction of the arrow, and the upper movable roller 21 supported here is shown in FIG. 7 around the upper fixed roller 20. To rotate upward. On the other hand, the lower cylinder 31 further contracts, and the arm 23 is
The lower movable roller 34 attached thereto is rotated around the axis of 33, and the plate 10 is bent upward between the three axes of the upper fixed roller 20 and the lower fixed roller 33 and the lower movable roller 34. .

[0024] When the sheet material 10 in a position to form a bend radius R ₂ of the opposite is sent, the upper portion of the cylinder 31 is contracted, the arm 23 as shown in FIG. 8 is supported here by rotating The upper movable roller 21 rotates around the upper fixed roller 20 to the left in the drawing and descends. On the other hand, the lower cylinder 31 extends, the arm 23 rotates leftward in the figure around the axis of the lower fixed roller 33, and the lower movable roller 34 attached thereto moves down, and the upper fixed roller 20 plate 10 between the three axes of the upper movable roller 21 and lower fixing roller 33 is rounded R ₂ moiety is bent downward is formed. Thereafter, the upper cylinder 31 is extended and the lower cylinder 31 is contracted to arrange the upper fixed roller 20 and the upper movable roller 21 horizontally as shown in FIG.
When the lower fixed roller 33 and the lower movable roller 34 are arranged horizontally, the plate 10 advances linearly, and the upper plate 3 in which the plate 10 is bent into an S-shape can be formed.

Therefore, by changing the relative positional relationship between the upper fixed roller 20 and the upper movable roller 21 connected by the arm 23 and the lower fixed roller 33 and the lower movable roller 34 connected by the arm 23, an arbitrary A radius and a bending portion in a bending direction can be formed.

In the above embodiment, the case of S-shaped bending has been described, but any bending such as J-shaped bending or U-shaped bending can be performed. In the above-described embodiment, the upper movable roller 21 and the lower movable roller 34 are also connected to the motor and are driven to rotate. However, the structure may be such that only the upper fixed roller 20 and the lower fixed roller 33 are driven to rotate. The cylinder 31 for controlling the rotation of the arm 23 is not limited to that has been programmed in accordance with the pre-bent position and bending radius, when processed in manual, the bending template next roller area Provide the plate material while visually adjusting the positional relationship of the movable roller according to the bending template.
A method of sending 10 and bending may be used. Further, in the above-described embodiment, the case where the rotation of the arm 23 is performed by the cylinder 31 has been described.

[0027]

As described above, according to the radius bending machine according to the present invention, the relative positions of the upper fixed roller and the upper movable roller connected by the upper arm and the lower fixed roller and the lower movable roller connected by the lower arm. By changing the relative positional relationship, it is possible to continuously send the plate material between the rollers to form an S-shaped bent portion with an arbitrary radius and bending direction, and rely on the intuition of the operator as in the past. There is no need to visually perform bending, and continuous bending can be performed even when the bending direction is reversed, such as S-shaped bending, so that workability and dimensional accuracy are excellent, and processing costs can be significantly reduced. According to the second aspect of the present invention, it is easy to insert the flange portion. Further, according to the third aspect of the present invention, it is possible to prevent the goby portion from being crushed, thereby further improving workability and dimensional accuracy.

[Brief description of the drawings]

FIG. 1 is a left side view showing a round bending machine according to an embodiment of the present invention.

FIG. 2 is a left side view showing a state in which a main part of the radius bending machine shown in FIG. 1 is enlarged and partially broken.

FIG. 3 is a perspective view showing a rotating mechanism of an upper fixed roller and an upper movable roller shown in FIG.

FIG. 4 is a cross-sectional view taken along line AA of a left side portion of the radius bending machine shown in FIG.

FIG. 5 is a plan view showing a right side portion of the radius bending machine shown in FIG. 1;

FIG. 6 is an explanatory diagram showing a positional relationship of a roller in a state where a plate material is being fed linearly.

FIG. 7 is an explanatory diagram showing a positional relationship of a roller in a state where a plate material is bent upward.

FIG. 8 is an explanatory diagram showing a positional relationship of a roller in a state where a plate material is bent downward.

FIG. 9 is a perspective view showing an S-shaped square duct.

[Description of sign]

 1 square duct 3 upper plate 4 lower plate 5 flange 6 stand 7 lower frame 8 upper frame 10 plate 13a shaft 13b shaft 17 motor 18a gear 18b gear 20 upper fixed roller 21 upper movable roller 23 arm 26 rotation shaft 28a gear 28b gear 30 Link 31 Cylinder 33 Lower fixed roller 34 Lower movable roller 37 Annular groove 38 Lift frame 39 Cylinder 40 Table

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int. Cl. ⁷ , DB name) B21D 5/00-9/18

Claims (3)

(57) [Claims] An upper fixed roller and an upper movable roller are spaced from each other, and both ends thereof are connected by an arm.
The rotation axis located on the same line as the upper fixed roller
Attach and adjust the rotation angle to this rotation axis.
Connects rotating means to adjust the position of the upper movable roller
And is provided below the upper fixed roller in sliding contact therewith.
Between the lower fixed roller and the lower movable roller.
At a distance, both ends are connected by an arm, and this arm
Attaching a rotating shaft located on the same straight line as the lower fixed roller
By adjusting the rotation angle of this rotation axis,
Connect the rotating means to adjust the position of the lower movable roller,
A round bending machine wherein the upper fixed roller and the lower fixed roller are connected to a motor. 2. A lower fixed roller and a lower movable roller , wherein a rotation shaft for rotatably supporting an arm connecting the upper fixed roller and the upper movable roller is mounted on the upper frame.
The lower part of the rotating shaft that rotatably supports the arm connecting
Attach it to the frame and place the upper frame on top of the lower frame.
The radius bending machine according to claim 1 , wherein the arm is rotatably supported. 3. An upper fixed roller and an upper movable roller,
The round bending machine according to claim 1 or 2, wherein a plurality of annular grooves for allowing a goby portion to escape are formed on the outer periphery of the lower fixed roller and the lower movable roller at intervals in the longitudinal direction thereof.