JP2014054659A - Bending method, and bending device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a technology capable of molding work along the shape of a metal mold, without deforming the work so as to be separated from the metal mold.SOLUTION: In a bending method, work W having two machined parts machined along shapes of a first recessed portion Lc1 and a second recessed portion Lc2 is placed on a lower mold L having the first recessed portion Lc1 and the second recessed portion Lc2, and bending machining is performed on the work W by using a roller 10 made from an elastic body. The roller 10 is deformed along the shapes of the first recessed portion Lc1 and the second recessed portion Lc2 so as to mold cross sections of a plurality of machined parts in the work W along the cross-sectional shapes of the first recessed portions Lc1 and the second recessed portion Lc2 and so as to keep the cross-sectional shape of the molded work W, by pressing the work W with the roller 10. While pressing the work W by the roller 10, the roller 10 is rolled to simultaneously and continuously mold the plurality of machined parts in the work W.

Description

  The present invention relates to a technique for bending a workpiece using a roller.

2. Description of the Related Art Conventionally, a technique for bending an outer edge portion of a plate-like workpiece using a roller is widely known.
For example, Patent Document 1 discloses a technique for bending a flange located at an outer edge portion of a plate-like workpiece.

The roller as described above can also be applied to a case where a part other than the outer edge part of the workpiece is a processing target.
For example, as shown in FIG. 8, a plate-like workpiece W is placed on the lower mold L, and a bending process is performed on a portion of the workpiece W separated from the end portion using the above-described roller. Is possible.
Here, the lower mold L is a mold formed in a step shape, and includes an upper step surface La, a lower step surface Lb positioned below the upper step surface La, and a side surface Lc continuous to the upper step surface La and the lower step surface Lb. Have A first recess Lc1 and a second recess Lc2 are formed on the side surface Lc of the lower mold L so as to be recessed toward the inside of the lower mold L.
The first concave portion Lc1 is formed in the middle portion of the side surface Lc from the upper step surface La to the lower step surface Lb, and the second concave portion Lc2 is formed in the boundary portion between the side surface Lc and the lower step surface Lb. The first recess Lc1 and the second recess Lc2 are adjacent to each other such that the side surface Lc forms a step shape.
The workpiece W has a shape substantially along the surface of the lower mold L so as to come into contact with the upper step surface La, and one end (the right end portion of the workpiece W in FIG. 8) is positioned on the lower step surface Lb. In addition, it is placed on the lower mold L. A contact portion of the workpiece W with the upper surface La is pressed by the clamp C. That is, the workpiece W is fixed by being sandwiched between the upper stage surface La of the lower mold L and the clamp C. The workpiece W is first processed along the first recess Lc1, and then processed along the second recess Lc2.

However, when the workpiece W is machined along the first recess Lc1, the workpiece W is deformed so that one end of the workpiece W is separated from the lower step surface Lb of the lower mold L. Further, as shown in FIG. 9, when the workpiece W processed along the first recess Lc1 is processed along the second recess Lc2, the portion processed along the first recess Lc1 in the workpiece W is The workpiece W is deformed so as to be separated from the first recess Lc1 and so that one end portion of the workpiece W is separated from the lower step surface Lb of the lower mold L.
Thus, when the workpiece W is machined along the first concave portion Lc1 and the second concave portion Lc2 of the lower mold L, there is a problem that the vicinity of the machined portion of the workpiece W is deformed by the influence of the machining. Arise. Such a problem occurs even when the machining order is optimized, and it is difficult to prevent deformation of the workpiece W during machining.
As a means for preventing such deformation of the workpiece W, fixing a portion where the workpiece W may be deformed by a predetermined member is disadvantageous in that it increases costs.

JP 2002-35865 A

  This invention makes it a subject to provide the technique which can shape | mold the said workpiece | work along the shape of a metal mold | die, without deform | transforming so that a workpiece | work may separate from a metal mold | die.

  In the bending method according to the present invention, a work having a plurality of parts to be processed along a shape of the uneven surface is placed on a mold having an uneven surface, and a roller made of an elastic body is used. A bending method for bending a plurality of parts to be processed in the workpiece placed on the mold, wherein the workpiece is pressed against the uneven surface of the mold by the roller. So that the cross section of a plurality of parts to be processed in the work is formed along the cross-sectional shape of the uneven surface of the mold, and the cross-sectional shape of the formed work is maintained. Is deformed along the shape of the concavo-convex surface of the mold, and a plurality of parts to be processed in the workpiece are simultaneously and continuously formed by rolling the roller while pressing the workpiece with the roller. That.

  In the bending method according to the present invention, it is preferable that the outer peripheral surface of the roller has a shape along the cross-sectional shape of the uneven surface of the mold over the entire periphery.

  In the bending method according to the present invention, the step of calculating a force required for the roller to deform along the shape of the concave and convex surface of the mold, and the calculated force to move the workpiece by the roller. A step of determining whether or not the cross-sections of a plurality of parts to be processed in the workpiece are formed along the cross-sectional shape of the concave and convex surface of the mold when pressed toward the concave and convex surface of the mold; Determining whether the workpiece has sufficient strength to press the workpiece toward the uneven surface of the mold with the calculated force, and the workpiece is moved by the roller with the calculated force. It is determined that the cross section of the plurality of parts to be processed in the workpiece is formed along the cross sectional shape of the uneven surface of the mold, and the roller is calculated The workpiece with When it is determined that it has a strength that can be pressed toward the uneven surface of the mold, by rolling the roller while pressing the workpiece by the roller with the calculated force, When the workpiece is continuously formed and the workpiece is pressed against the concavo-convex surface of the mold by the roller with the calculated force, cross sections of a plurality of processed parts in the workpiece are the mold. It is determined that it is not molded along the cross-sectional shape of the uneven surface, or it is determined that the roller does not have enough strength to press the workpiece against the uneven surface of the mold with the calculated force. In this case, it is preferable to replace the roller with a replacement roller having at least one of a shape and a material different from that of the roller.

  In the bending method according to the present invention, the replacement roller is configured such that a part in the axial direction is made of a steel material over the entire circumference, and the other part in the axial direction is made of an elastic body over the entire circumference. The portion made of the steel material is configured to process at least one processed portion of the plurality of processed portions of the workpiece, and the portion formed of the elastic body in the replacement roller is the workpiece. Among the plurality of processed parts, the part made of steel in the replacement roller is configured to process other than the processed part to be processed, so as to maintain the cross-sectional shape of the processed work, It is preferable to deform along the shape of the uneven surface of the mold.

  The bending apparatus according to the present invention includes a roller, and a workpiece having a plurality of parts to be processed that is placed on a mold having an uneven surface and processed along the shape of the uneven surface. A bending apparatus that performs bending on a plurality of parts to be processed in a workpiece by rolling the roller while pressing the concave and convex surface of the mold. So that the cross section of a plurality of parts to be processed in the workpiece is molded along the cross sectional shape of the uneven surface of the mold, and the cross sectional shape of the molded workpiece is maintained. It is comprised from the elastic body which deform | transforms along the shape of the uneven surface of the said metal mold | die.

  The bending apparatus according to the present invention includes a roller, and a workpiece having a plurality of parts to be processed that is placed on a mold having an uneven surface and processed along the shape of the uneven surface. A bending apparatus that performs bending on a plurality of parts to be processed in a workpiece by rolling the roller while pressing toward the uneven surface of the mold, wherein the roller is axially A part of which is made of a steel material over the entire circumference, and another part in the axial direction is made of an elastic body over the whole circumference, and the part made of the steel material in the replacement roller is a plurality of work parts in the workpiece A portion formed of an elastic body in the replacement roller is a plurality of portions to be processed in the workpiece. Of these, the portion constituted by the steel material in the replacement roller is configured to process other than the processed portion to be processed, and the uneven surface of the mold is maintained so as to maintain the cross-sectional shape of the processed workpiece. Deform along the shape.

  According to the present invention, the workpiece can be formed along the shape of the mold without being deformed so as to be separated from the mold.

The cut end view which shows the workpiece | work which is a process target of the bending processing apparatus which concerns on this invention, and the lower mold | type for mounting the said workpiece | work. The figure which shows the bending apparatus which concerns on this invention. The figure which shows a mode that a bending process is given to a workpiece | work with a bending apparatus. The figure which shows a mode that a bending process is given to a workpiece | work with a bending apparatus. The figure which shows another form of the bending apparatus which concerns on this invention. The flowchart which shows the process performed before the bending process of a workpiece | work. The figure which shows the bending apparatus which attached the roller for replacement | exchange. The figure which shows the problem which arises when bending a workpiece | work using the conventional roller. The figure which shows the problem which arises when bending a workpiece | work using the conventional roller.

Below, with reference to FIG. 1 and FIG. 2, the bending apparatus 1 which is one Embodiment of the bending apparatus which concerns on this invention is demonstrated.
The bending apparatus 1 is an apparatus for bending the workpiece W placed on the lower mold L along the shape of the lower mold L.

As shown in FIG. 1, the lower mold | type L has the upper step surface La, the lower step surface Lb, and the side surface Lc, and has a step-shaped cross section. The lower mold L has a shape in which the step-shaped cross section is continuous along a moving direction (strictly speaking, a rolling direction of a roller 10 described later) when the bending apparatus 1 is processed. The lower mold L is an embodiment of a mold according to the present invention.
FIG. 1 is a diagram (cut end view) showing a cross section of a lower mold L, a workpiece W, and the like perpendicular to the rolling direction of the roller 10. In the present invention, the “cross section” means a cross section perpendicular to the rolling direction of the roller 10.

The upper step surface La and the lower step surface Lb of the lower mold L are formed so as to be substantially parallel to each other, and the lower step surface Lb is located below the upper step surface La.
The side surface Lc of the lower mold L is formed so as to be continuous with the upper step surface La and the lower step surface Lb. A first recess Lc1 and a second recess Lc2 are formed on the side surface Lc.
The 1st recessed part Lc1 is a hollow formed in the side surface Lc, and is located in the middle part from the upper stage surface La to the lower stage surface Lb. The first concave portion Lc1 is formed so that the width gradually decreases toward the deep portion, and the deep portion forms a curved surface having a relatively small radius of curvature.
The second concave portion Lc2 is a depression formed in the side surface Lc, and is located at the boundary between the side surface Lc and the lower step surface Lb. The second concave portion Lc2 is formed so that the width gradually decreases toward the deep portion, and the deep portion forms a curved surface having a relatively small radius of curvature.
The first recess Lc1 and the second recess Lc2 are formed adjacent to each other such that the side surface Lc forms a step shape. The first concave portion Lc1 and the second concave portion Lc2 correspond to the “uneven surface” of the lower mold according to the present invention.

The workpiece W is a plate-shaped steel material, and has a shape substantially along the surface of the lower mold L. Specifically, the workpiece W is previously formed into a shape substantially along the surface of the lower mold L using a general roller.
The workpiece W is in contact with the upper stage surface La of the lower mold L, and one end (the right end of the workpiece W in FIG. 1) is positioned on the lower stage surface Lb of the lower mold L. Is placed. A contact portion of the workpiece W with the upper surface La is pressed by the clamp C.
The clamp C is a member that presses a contact portion of the work W with the upper stage surface La, and fixes the work W by sandwiching the work W together with the upper stage surface La of the lower mold L. The clamp C is preferably made of resin or the like so as not to damage the surface of the workpiece W.

  As shown in FIG. 2, the bending apparatus 1 includes a roller 10, a holding member 20, a shaft member 30, and a bracket 40.

The roller 10 is a roller made of an elastic material such as ester polyurethane, and is formed in a substantially annular shape. The roller 10 has a first surface 11, a second surface 12, and a third surface 13 that constitute the outer peripheral surface thereof.
The first surface 11 forms part of the outer peripheral surface of the roller 10 and is formed to be substantially parallel to the axis of the roller 10.
The second surface 12 forms a part of the outer peripheral surface of the roller 10 and is one end surface in the axial direction of the roller 10 from the first surface 11 (the roller 10 in FIG. 2) so as to be inclined with respect to the axial center of the roller 10. To the right end surface).
The third surface 13 forms a part of the outer peripheral surface of the roller 10, and the other end surface in the axial direction of the roller 10 from the first surface 11 (the roller 10 in FIG. 2) so as to be inclined with respect to the axial center of the roller 10. Left end surface). The third surface 13 is formed to have a smaller area than the second surface 12.

Further, a through hole 14 is formed in the roller 10.
The through hole 14 is formed so as to penetrate the roller 10 along its axial direction. The through hole 14 is formed concentrically with the roller 10. A holding member 20 is inserted into the through hole 14.

The holding member 20 is a member for holding the roller 10 and is formed in a substantially cylindrical shape. The outer diameter of the holding member 20 is set to be approximately the same as the diameter of the through hole 14 of the roller 10, and the holding member 20 can be inserted into the through hole 14 of the roller 10. In order to fix the roller 10, the holding member 20 is provided with a protruding portion 21 and a lid portion 22.
The protruding portion 21 is formed so that one end portion of the holding member 20 (the right end portion of the holding member 20 in FIG. 2) has a larger diameter.
The lid portion 22 is formed in a disk shape having an outer diameter substantially the same as the protruding portion 21. The lid portion 22 is disposed so that the surface thereof is in contact with the other end surface of the holding member 20 (the left end surface of the holding member 20 in FIG. 2), and is fixed to the holding member 20 by a plurality of bolts 23. Yes.
As described above, the holding member 20 is configured to restrict the movement of the roller 10 in the axial direction and fix the roller 10 by the protruding portion 21 and the lid portion 22.

The holding member 20 is rotatably attached to the shaft member 30 via bearings 24 and 24.
The bearings 24 and 24 are bearings interposed between the inner peripheral surface of the holding member 20 and the outer peripheral surface of the shaft member 30, and are arranged at a predetermined interval from each other.

The shaft member 30 is formed in a columnar shape, and supports the holding member 20 via bearings 24 and 24 in a rotatable manner.
One end portion of the shaft member 30 (the right end portion of the shaft member 30 in FIG. 2) is fixed to the bracket 40.

  The bracket 40 is a member for attaching the bending apparatus 1 to a predetermined robot arm (not shown). The bracket 40 extends in a predetermined direction while being curved so as not to interfere with the workpiece W and the lower mold L when the workpiece W is processed by the bending apparatus 1. One end of the bracket 40 (the lower end of the bracket 40 in FIG. 2) supports the shaft member 30, and the other end (not shown) of the bracket 40 is attached to the robot arm.

Below, with reference to FIGS. 3-7, the bending process which is one Embodiment of the bending method which concerns on this invention is demonstrated.
The bending process is a process of bending the workpiece W using the bending apparatus 1.

  As shown in FIG. 3, in the bending process, first, the bending apparatus 1 is inclined so that the second surface 12 of the roller 10 is parallel to the lower step surface Lb of the lower mold L, and the side surface of the lower mold L The bending apparatus 1 is brought closer to Lc.

Next, as shown in FIG. 4, the second surface 12 of the roller 10 is brought into contact with a portion of the workpiece W that contacts the lower surface Lb of the lower mold L, and the direction orthogonal to the shaft member 30 of the roller 10. Then, the roller 10 is pressed against the workpiece W. Thus, the workpiece 10 is pressed by the roller 10 toward the first recess Lc1 and the second recess Lc2 formed on the side surface Lc of the lower mold L.
At this time, the roller 10 is deformed along the shapes of the first concave portion Lc1 and the second concave portion Lc2, and the workpiece W is so shaped that the cross section of the workpiece W is along the cross sections of the first concave portion Lc1 and the second concave portion Lc2. Is processed. That is, in the roller 10, two parts to be processed in the workpiece W (portions corresponding to the first recess Lc <b> 1 and the second recess Lc <b> 2 in the workpiece W) completely contact the surfaces of the first recess Lc <b> 1 and the second recess Lc <b> 2. The two workpiece parts of the workpiece W are deformed along the shape of the lower mold L so that the cross-sections of the two parts to be processed are the shapes along the cross sections of the first concave portion Lc1 and the second concave portion Lc2.

  Finally, by rolling the roller 10 while pressing the workpiece W by the roller 10, the entire processed portion of the workpiece W is continuously along the first concave portion Lc1 and the second concave portion Lc2 of the lower mold L. It will be molded.

As described above, the roller 10 is deformed along the first concave portion Lc1 and the second concave portion Lc2 of the lower mold L. Therefore, even if the lower mold L has a complicated shape, a plurality of parts to be processed in the workpiece W are formed. It can be molded at the same time.
Thereby, the time and cost required for bending the workpiece W can be reduced.
In the present embodiment, the two workpiece parts of the workpiece W are simultaneously machined along the shapes of the first concave portion Lc1 and the second concave portion Lc2 by the roller 10; Even in the case of more than one, the roller 10 can simultaneously process a plurality of processed parts or all the processed parts in the workpiece W.

In addition, the roller 10 presses the two processed portions in the workpiece W in a state of being deformed along the shapes of the first concave portion Lc1 and the second concave portion Lc2 even after processing the two processed portions in the workpiece W. Therefore, it is possible to prevent the two workpiece parts in the workpiece W from being deformed so as to be separated from the first recess Lc1 and the second recess Lc2.
Furthermore, since the roller 10 is deformed so as to press the work W over a wide range, it is possible to prevent the work W from being deformed so as to be separated from the lower mold L when the work W is bent. Specifically, since the vicinity of the part to be processed of the workpiece W that may be deformed under the influence of the processing is pressed by the deformed roller 10, the workpiece W is deformed so as to be separated from the lower mold L. This can be prevented.
In particular, the roller 10 presses the portion of the workpiece W that contacts the lower surface Lb of the lower mold L by the second surface 12, so that the workpiece W is in the lower surface of the lower mold L when the workpiece W is bent. It is possible to prevent deformation from being separated from Lb.
Thus, the roller 10 is deformed so that the cross-sectional shape of the workpiece W formed along the cross-sectional shapes of the first concave portion Lc1 and the second concave portion Lc2 is maintained.
Thereby, it becomes unnecessary to fix the part which may deform | transform in the workpiece | work W with a predetermined | prescribed member, and the time and cost which the bending work of the workpiece | work W requires can be reduced.

  The roller 10 is formed so that the cross sections of the two workpiece portions of the work W are formed along the cross sections of the first concave portion Lc1 and the second concave portion Lc2 of the lower mold L, and the cross section of the formed workpiece. What is necessary is just to comprise from the elastic body which deform | transforms along the 1st recessed part Lc1 and 2nd recessed part Lc2 of the lower mold | type L so that a shape may be maintained, The raw material is not specifically limited. However, it is preferable to employ an elastic body that expands and contracts by about 200 to 500% as a material of the roller 10, and particularly ester polyurethane has excellent ductility and tensile strength, and excellent wear resistance and oil resistance. Therefore, it is preferable to employ this as the material of the roller 10.

Further, the shape of the roller 10 is not limited, and can be appropriately changed according to the shape of the lower mold L and the like.
For example, the outer peripheral surface of the roller 10 can be shaped along the cross-sectional shape of the first concave portion Lc1 and the second concave portion Lc2 of the lower mold L over the entire circumference.
Specifically, as shown in FIG. 5, a V-shaped groove 11 a can be continuously formed on the first surface 11 of the roller 10 over the entire circumference. The portion of the roller 10 closer to the third surface 13 than the groove 11a corresponds to the first recess Lc1 of the lower die L, and the portion of the roller 10 closer to the second surface 12 than the groove 11a corresponds to the second recess Lc2 of the lower die L. Corresponding to
Thereby, even when the roller 10 is pressed against the workpiece W with a relatively small force, the roller 10 can be favorably deformed along the shapes of the first concave portion Lc1 and the second concave portion Lc2 of the lower mold L. .

In addition, when performing the bending process of the workpiece | work W with the roller 10, it is preferable to perform the following processes previously.
Specifically, as shown in FIG. 6, Steps S <b> 1 to S <b> 5 are performed before the work W is bent by the roller 10.

In step S1, when the roller 10 is pressed against the lower mold L, a force F is calculated to such an extent that the roller 10 is deformed so as to be completely in contact with the surfaces of the first recess Lc1 and the second recess Lc2.
Specifically, based on the characteristics of the elastic body forming the roller 10 and the surface area of the lower mold L on which the roller 10 is pressed, the roller 10 completely contacts the surfaces of the first recess Lc1 and the second recess Lc2. The force F necessary for the deformation is calculated. Note that the force F can be actually measured.
After step S1, step S2 is performed.

In step S2, when the workpiece W is pressed by the roller 10 with the calculated force F, the cross sections of the two processed portions of the workpiece W are formed along the cross sectional shapes of the first concave portion Lc1 and the second concave portion Lc2. Determine whether it will be done.
If it is determined that the calculated force F is a value sufficient for machining the workpiece W, step S3 is performed.
If it is determined that the calculated force F is not sufficient for machining the workpiece W, step S5 is performed.

In step S <b> 3, it is determined whether the roller 10 has sufficient strength to press the workpiece W with the calculated force F.
If it is determined that the roller 10 has sufficient strength to press the workpiece W with the calculated force F, step S4 is performed.
If it is determined that the roller 10 does not have enough strength to press the workpiece W with the calculated force F, step S5 is performed.

In step S4, the force that presses the workpiece W by the roller 10 is set to the value of the calculated force F.
Thereafter, the work W is bent by the roller 10 with the calculated force F.

In step S5, the roller 10 is replaced with the roller 100.
As shown in FIG. 7, the roller 100 includes a hard portion 110 made of steel and an elastic portion 120 made of an elastic body similar to the roller 10.
The hard portion 110 is a roller made of a steel material, and is provided so as to cover the outer peripheral surface on the other end surface side in the axial direction of the holding member 20 (left end surface side of the holding member 20 in FIG. 8). The hard portion 110 has a shape corresponding to the first recess Lc1 of the lower mold L, and is configured to be able to process a portion to be processed corresponding to the first recess Lc1 in the workpiece W.
The elastic part 120 is a roller made of an elastic body similar to the roller 10, and is provided so as to cover a part of the outer peripheral surface of the holding member 20 where the hard part 110 is not provided. The elastic portion 120 has a shape corresponding to the second recess Lc2 of the lower mold L, and is configured to be able to process a portion to be processed corresponding to the second recess Lc2 in the workpiece W. Further, the elastic portion 120 has a surface substantially the same as the second surface 12 of the roller 10. Like the roller 10, the elastic part 120 is deformed along the shape of the second recess Lc2 of the lower mold L and presses the work W over a wide range, so that the cross-sectional shape of the processed work W is maintained. Become.

As described above, the roller 100 has a part in the axial direction made of steel over the entire circumference, and the other part in the axial direction made of an elastic body over the whole circumference.
Therefore, even when the processed portion corresponding to the first concave portion Lc1 in the workpiece W cannot be processed by the roller 10, by replacing the roller 10 with the roller 100, the hard portion 110 made of steel material allows the workpiece W to be replaced with the roller 100. The part to be processed corresponding to the first recess Lc1 can be processed satisfactorily.
In this embodiment, the roller 100 is provided with one hard portion 110 and one elastic portion 120, but the number thereof is not limited.

As described above, the roller 100 functions as a “replacement roller” according to the present invention.
The roller 100 is not limited, and it is sufficient that at least one of the shape and material is different from the roller 10 before replacement.
For example, the roller 10 in which the above-described groove 11a is formed can be used as the roller 100.

DESCRIPTION OF SYMBOLS 1 Bending apparatus 10 Roller 11 1st surface 12 2nd surface 13 3rd surface 20 Holding member 30 Shaft member 40 Bracket 100 Roller (replacement roller)
L Lower mold Lc1 First recess Lc2 Second recess W Workpiece

Claims (6)

A workpiece having a plurality of parts to be processed along the shape of the uneven surface is placed on the mold having the uneven surface,
A bending method in which bending is performed on a plurality of parts to be processed in a workpiece placed on the mold by using a roller formed of an elastic body,
By pressing the workpiece toward the concave / convex surface of the mold by the roller, the cross-sections of a plurality of processed parts in the workpiece are formed along the cross-sectional shape of the concave / convex surface of the mold, and The roller is deformed along the shape of the uneven surface of the mold so that the cross-sectional shape of the molded workpiece is maintained,
A plurality of parts to be processed in the workpiece are simultaneously and continuously formed by rolling the roller while pressing the workpiece by the roller.
A bending method characterized by that. The outer peripheral surface of the roller has a shape along the cross-sectional shape of the uneven surface of the mold, over the entire circumference.
The bending method according to claim 1. Calculating a force required for the roller to deform along the shape of the uneven surface of the mold;
When the workpiece is pressed toward the concave / convex surface of the mold by the roller with the calculated force, the cross-sections of the plurality of processed parts in the workpiece follow the cross-sectional shape of the concave / convex surface of the mold. Determining whether to be molded; and
Determining whether the roller has a strength that can press the workpiece against the uneven surface of the mold with the calculated force, and
When the workpiece is pressed toward the concave / convex surface of the mold by the roller with the calculated force, the cross-sections of the plurality of processed parts in the workpiece follow the cross-sectional shape of the concave / convex surface of the mold. When it is determined that the roller is formed and it is determined that the roller has sufficient strength to press the workpiece against the uneven surface of the mold with the calculated force, the calculated The workpiece is continuously formed by rolling the roller while pressing the workpiece with the roller with force,
When the workpiece is pressed toward the concave / convex surface of the mold by the roller with the calculated force, the cross-sections of the plurality of processed parts in the workpiece follow the cross-sectional shape of the concave / convex surface of the mold. When it is determined that it is not molded, or when it is determined that the roller does not have enough strength to press the workpiece against the uneven surface of the mold with the calculated force, Replace with a replacement roller that is different in shape and material from the roller.
The bending method according to claim 1 or 2, wherein the bending method is performed. The replacement roller has a part in the axial direction made of steel over the entire circumference, and the other part in the axial direction made of an elastic body over the whole circumference,
The portion composed of the steel material in the replacement roller is configured to process at least one processed portion of the plurality of processed portions in the workpiece,
The portion configured from the elastic body in the replacement roller is configured to process a portion other than the processing portion to be processed by the portion configured from the steel material in the replacement roller among the plurality of processing portions in the workpiece. Is deformed along the shape of the concavo-convex surface of the mold so as to maintain the cross-sectional shape of the processed workpiece.
The bending method according to claim 3. Equipped with rollers,
While pressing a work having a plurality of parts to be processed, which are placed on a mold having an uneven surface and processed along the shape of the uneven surface, against the uneven surface of the mold by the roller, the A bending apparatus that performs bending on a plurality of parts to be processed in a workpiece by rolling a roller,
When the roller presses the work, the cross section of the plurality of processed parts in the work is formed along the cross-sectional shape of the uneven surface of the mold, and the cross-sectional shape of the formed work It is composed of an elastic body that deforms along the shape of the concave and convex surface of the mold so as to maintain
A bending apparatus characterized by that. Equipped with rollers,
While pressing a work having a plurality of parts to be processed, which are placed on a mold having an uneven surface and processed along the shape of the uneven surface, against the uneven surface of the mold by the roller, the A bending apparatus that performs bending on a plurality of parts to be processed in a workpiece by rolling a roller,
The roller is partly composed of steel material in the entire axial direction, and the other part in the axial direction is composed of an elastic body over the entire circumference,
The portion composed of the steel material in the replacement roller is configured to process at least one processed portion of the plurality of processed portions in the workpiece,
The portion configured from the elastic body in the replacement roller is configured to process a portion other than the processing portion to be processed by the portion configured from the steel material in the replacement roller among the plurality of processing portions in the workpiece. Is deformed along the shape of the concavo-convex surface of the mold so as to maintain the cross-sectional shape of the processed workpiece.
A bending apparatus characterized by that.

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