JP2022038490A - Manufacturing apparatus of cylindrical laminate - Google Patents

Abstract

To provide a manufacturing apparatus of cylindrical laminate capable of manufacturing a cylindrical laminate with sufficient accuracy.SOLUTION: A manufacturing apparatus of cylindrical laminate comprises: molding sections 51, 52 and 53 that bend belt-like base materials 11 in a width direction; and a feed section that feeds the base materials 11 forward successively to the molding sections 51, 52 and 53. The molding sections 51, 52 and 53 each comprise: two of outer rollers 31, 32, 33 and 34 aligned in a lengthwise direction of the base materials in the form of being in contact with an outer side in a bending direction of the base materials 11; and one of inner rollers 41, 42 and 43 arranged in the middle of the alignment direction of the two of the outer rollers in the form of being in contact with an inner side in the bending direction of the base materials 11. The plurality of molding sections 51, 52 and 53 are disposed in the form of being aligned in the direction of feeding the base materials 11 forward successively.SELECTED DRAWING: Figure 5

Description

The present invention relates to an apparatus for manufacturing a tubular laminated body for manufacturing a cylindrical laminated body from a strip-shaped plate material.

A cylindrical laminated body having a laminated structure in which annular plate members are laminated is known (see Patent Document 1). The present applicant has proposed a manufacturing apparatus for manufacturing a cylindrical laminate (Japanese Patent Application No. 2019-43824).

This manufacturing device has a molding unit that bends a strip-shaped plate (base material) in the width direction to form each layer of a tubular laminate into an annular shape, and a supply unit that sequentially feeds the base material and supplies it to the molding unit. It is equipped with.
The molded portion is arranged between the two outer rollers lined up in the length direction of the base metal so as to be in contact with the outside in the bending direction of the base metal and the two outer rollers arranged in the arrangement direction of the two outer rollers so as to be in contact with the inside in the bending direction of the base metal. It has one inner roller and the like. In this manufacturing apparatus, when the strip-shaped base material sent out from the supply unit passes through the molding unit composed of three rollers, the base material is bent in the width direction and formed into an arc shape. In this way, an annular plate material is formed from the strip-shaped base material, and a cylindrical laminated body in which the plate material is laminated is manufactured.

Japanese Unexamined Patent Publication No. 2020-102958

In the technique of Japanese Patent Application No. 2019-43824, the strip-shaped base metal sequentially fed by the supply section is continuously bent as it passes through the molding section consisting of three rollers. In such continuous bending, the bending angle varies in each part of the base metal after processing. This variation in the bending angle reduces the roundness of each layer of the tubular laminated body, which contributes to a decrease in the forming accuracy of the tubular laminated body.

The present invention has been made in view of such circumstances, and an object of the present invention is to provide a laminate manufacturing apparatus capable of accurately manufacturing a tubular laminate.

In the apparatus for manufacturing a tubular laminate for solving the above problems, a molding portion for forming each layer of the tubular laminate into an annular shape by bending a strip-shaped base material in the width direction and the base material are sequentially fed. The molding unit includes a supply unit for supplying to the molding unit, and the molding unit includes two outer rollers arranged in the length direction of the base material in a manner in contact with the outside in the bending direction of the base material, and the inside in the bending direction of the base material. In a tubular laminated body manufacturing apparatus having one inner roller arranged in the middle of the arrangement direction of the two outer rollers in a manner in contact with the above, the base material is arranged in a progressive direction. A plurality of molded portions are provided.

According to the above configuration, the base metal is bent stepwise by using a plurality of molded portions to suppress a machining error caused by a large bending amount in one machining, or the base metal is bent at a predetermined angle by the first molded portion. Each layer of the tubular laminate can be molded with a high degree of roundness by using a plurality of molded portions, such as correcting the bending angle of the same base material by the second molded portion after bending to. As a result, the tubular laminate can be manufactured with high accuracy.

In the manufacturing apparatus, the molding portion on the front side in the progressive feeding direction among the plurality of molding portions bends the base material to the first bending angle, and the progressive feeding portion among the plurality of molding portions. It is preferable that the molded portion on the inner side in the direction of bending bends the base material to a second bending angle larger than the first bending angle.

In general, when the bending amount of the base metal in one bending process is increased, a part of the base metal (for example, a fragile portion) is deformed so as to bend, and the bending angle of each part of the base metal tends to vary. According to the above configuration, the bending amount of the base metal in one bending process can be reduced by bending the base metal stepwise by using a plurality of molded portions. Therefore, it is possible to suppress that the bending angle of the base metal is partially increased and to form each layer of the tubular laminated body with high roundness.

In the manufacturing apparatus, the three rollers constituting the molded portion having the largest bending amount in the width direction include a driving unit that rotationally drives the rollers in a manner in which the base metal is sequentially fed by the rollers. It is preferable that it is provided.

In the bending process of bending a strip-shaped base material in the width direction, compressive stress is likely to occur in the inner part of the base material in the bending direction, and this compressive stress may cause the same part to become unnecessarily thick or wavy. ..

According to the above configuration, bending by the molded portion having the largest bending amount among the plurality of molded portions, that is, the molded portion (hereinafter referred to as the specific molded portion) in which the compressive stress generated in the inner portion in the bending direction of the base metal tends to be large. Machining can be performed while feeding the base metal in the forward feed direction by three rollers (specifically, drive rollers rotationally driven by the drive unit) constituting the specific forming portion. As a result, when the base material is bent by the specific molded portion, the base material can be smoothly sent out from the specific molded portion. Therefore, at this time, the compressive stress generated in the inner portion of the base metal in the bending direction can be reduced, and the inner portion of the base metal in the bending direction can be prevented from becoming unnecessarily thick or wavy.

In the manufacturing apparatus, at least one of the plurality of inner rollers constituting a part of the plurality of molded portions is a drive unit that rotationally drives the inner rollers in a manner in which the base metal is sequentially fed by the inner rollers. Is preferably provided.

According to the above configuration, since the inner roller in contact with the inner portion of the base metal in the bending direction is rotationally driven, the inner roller sequentially feeds the inner portion of the base metal in the bending direction when the forming portion bends the base metal. Can be sent out in the direction. As a result, the inner portion of the base metal in the bending direction can be smoothly sent out from the molded portion, so that the compressive stress generated in the same portion can be reduced, and the inner portion of the base metal in the bending direction becomes unnecessarily thick. It is possible to suppress the wavy shape.

In the manufacturing apparatus, the base material has a notch portion having a notched end in the width direction.
When a base material having a notch is used, a difference in bending angle is likely to occur between the notch and the other parts of the base material, which causes a decrease in the roundness of each layer of the tubular laminate. It will be easier to invite. According to the above configuration, although the tubular laminate is manufactured using the base material having such a notch, the tubular laminate can be manufactured with high accuracy.

In the manufacturing apparatus, the two outer rollers arranged in the length direction of the base material in contact with the outside in the bending direction of the base material and the two outer rollers in the arrangement direction in the arrangement direction of the two outer rollers in contact with the inside in the bending direction of the base material. It has one inner roller arranged in the middle, is arranged on the back side in the progressive direction from the plurality of molded portions, and bends the base material in a direction to reduce the bending angle of the base material. It is preferable to have a bending back portion.

When the strip-shaped base material is bent in the width direction, the bending amount of the relatively fragile part (hereinafter referred to as the fragile part) of the base material is large, while the bending amount of the other parts is small. As such, there is a possibility that the bending amount of each part of the base metal may vary.

In the above configuration, the base metal is bent in one direction by bending by a plurality of forming portions, and then bent back in the other direction by bending by a bending back portion. In such a series of bending processes, the bending amount of the fragile portion in the base metal tends to be larger than the bending amount of the other portions in both the bending process by the plurality of molded portions and the bending process by the bending back portion. From this, according to the above configuration, when the fragile portion of the base metal is bent significantly in one direction as compared with other portions due to the bending process by a plurality of molded portions, in the subsequent bending process by the bending back portion. By bending the fragile part in the other direction as compared with the other parts, the overbent part can be bent back in the opposite direction. As a result, the difference in the bending angle between the fragile portion of the base metal and the other portion can be reduced, so that the variation in the bending angle in each portion of the base metal can be suppressed.

In the manufacturing apparatus, the base material is a metal plate.

According to the present invention, a tubular laminate can be manufactured with high accuracy.

The perspective view of the laminated body of one Embodiment. A side view of a manufacturing apparatus for manufacturing a laminate. Top view of the manufacturing equipment. (A) of the guide roller is a plan view, and (b) is a 4b arrow view of (a). Schematic diagram showing the positional relationship between each processing roller and the base metal. The schematic diagram which shows the state of the bending process of a base material by a bending back part.

Hereinafter, an embodiment of an apparatus for manufacturing a tubular laminate will be described.
As shown in FIG. 1, the laminated body 10 has a substantially cylindrical shape. The laminated body 10 has a laminated structure in which substantially annular plate materials are laminated. The base material 11 constituting the laminated body 10 is made of a steel plate and has a strip shape extending in a spiral shape. In the laminated body 10, each part of the base material 11 forming each layer thereof is in a state of being overlapped in the thickness direction.

The base metal 11 has a notched portion 12 having a notched end on the outer peripheral side. The cutout portions 12 are provided in the base metal 11 at equal angle (72 degrees in this embodiment) intervals. The inner surface of the notch portion 12 has an arc shape. All the cutouts 12 have the same shape.

The cutout portion 12 of the base material 11 is used for aligning each layer of the laminated body 10 when manufacturing the laminated body 10. Specifically, by using a jig for alignment or the like to superimpose the notch portions 12 in the direction of the center line of the laminated body 10 at five locations in the circumferential direction of the laminated body 10, the base material 11 is provided. The circumferential position of the portion forming each layer of the laminated body 10 is adjusted.

Further, the cutout portion 12 of the base material 11 is used as a joining portion for joining the portions forming each layer of the laminated body 10 in the base material 11. Specifically, the inner surface of the notch portion 12 is continuously welded in the center line direction through laser welding.

Due to the cutouts 12 of the base metal 11, grooves extending in the center line direction and having an arcuate inner surface are formed at equal intervals on the outer peripheral surface of the laminated body 10.
Hereinafter, a manufacturing apparatus for manufacturing the laminated body 10 will be described.

In the present embodiment, when the laminated body 10 is manufactured, the strip-shaped plate material is bent in the width direction and formed into an annular shape.
As shown in FIGS. 2 and 3, a strip-shaped base material 11 in which notches 12 are formed at equal intervals in advance at one end in the width direction is used for this bending process. The base material 11 is arranged in a state of being wound around a roll (not shown).

The manufacturing apparatus 20 of the present embodiment has a flat plate-shaped base portion 21 extending in the vertical direction. A guide roller 22 for guiding the base material 11 is rotatably provided on the base portion 21.

As shown in FIG. 4, the guide roller 22 has a columnar shape. An annular engaging groove 23 is provided on the outer peripheral surface of the guide roller 22 over the entire circumference. The width of the engaging groove 23 is larger than the thickness of the base material 11. When the base material 11 is bent by the manufacturing apparatus 20, the end portion of the base material 11 in the width direction is engaged with the engaging groove 23 of the guide roller 22.

As shown in FIGS. 2 and 3, the base portion 21 has two guide rollers 22 engaged with one end (upper side of FIG. 2) in the width direction of the base material 11 and a width direction of the base material 11. A total of four guide rollers 22 are provided, including two guide rollers 22 that engage the other end (lower part of FIG. 2). When the base material 11 is bent by the manufacturing apparatus 20, the base material 11 passes between the guide rollers 22 in a manner of engaging with the engagement grooves 23 of the four guide rollers 22. As a result, the base metal 11 is guided in a stable state.

The base portion 21 is provided with a supply section 24 for sequentially feeding the base metal 11 to supply the base metal 11 to a portion (molding portions 51, 52, 53 and bending back portion 54 described later) for bending the base material 11. The supply unit 24 is provided at a position where the base material 11 that has passed between the guide rollers 22 reaches. The supply unit 24 has a pair of supply rollers 25 provided so that the outer peripheral surfaces face each other. These supply rollers 25 are connected via a gear mechanism so as to rotate in opposite directions at the same rotation speed. A supply motor 26 for rotationally driving the supply rollers 25 is connected to one of the pair of supply rollers 25. When the base material 11 is bent by the manufacturing apparatus 20, the base material 11 guided to the supply unit 24 by the guide roller 22 passes between the supply rollers 25 rotationally driven by the supply motor 26 and is extruded. Will be sent in the forward feed direction.

A processing roller 27 for bending the base material 11 is rotatably provided on the base portion 21. The processing roller 27 and the guide roller 22 (see FIG. 4) have the same basic structure. As shown in FIGS. 3 and 5, specifically, the processing roller 27 has a columnar shape, and an annular engaging groove 28 extending over the entire circumference is formed on the outer peripheral surface of the processing roller 27. The width of the engaging groove 28 is equal to (more specifically, slightly larger) the thickness of the base metal 11. When the base material 11 is bent by the manufacturing apparatus 20, the end portion of the base material 11 in the width direction is engaged with the engaging groove 28 of the processing roller 27.

As shown in FIGS. 2 and 3, the base portion 21 includes five processing rollers 27 arranged in the progressive feed direction (length direction) of the base material 11 in a manner in contact with the outside of the base material 11 in the bending direction, and a base material. A total of nine processing rollers 27 are provided, including four processing rollers 27 arranged in the length direction of the base metal 11 so as to be in contact with the inside of the bending direction of 11. When the base material 11 is bent by the manufacturing apparatus 20, the base material 11 passes between the processing rollers 27 in a manner of engaging with the engaging grooves 28 of the nine processing rollers 27. In the present embodiment, when the base material 11 passes between the processing rollers 27 in this way, the base material 11 is bent in the width direction.

As shown in FIG. 5, in the present embodiment, the base metal 11 is bent in the width direction by passing between three processing rollers 27 in which lines connecting the centers of rotation are arranged in a triangular shape. Is formed into an arc shape. The forming portions 51, 52, 53 and the bending back portion 54, which are the portions of the manufacturing apparatus 20 for bending the base material 11, are arranged in the length direction of the base material 11 so as to be in contact with the outside of the base material 11 in the bending direction. It is composed of one processing roller 27 (outer roller) and one processing roller 27 (inner roller) arranged in the middle of the arrangement direction of the two outer rollers so as to be in contact with the inner side of the base material 11 in the bending direction.

In the present embodiment, the five processing rollers 27 arranged in the length direction of the base material 11 in contact with the outside in the bending direction of the base material 11 are arranged in order from the front side in the progressive feed direction of the base material 11 as the first outer roller 31. , The second outer roller 32, the third outer roller 33, the fourth outer roller 34, and the fifth outer roller 35. Further, the four processing rollers 27 arranged in the length direction of the base material 11 so as to be in contact with the inside of the base material 11 in the bending direction are arranged in order from the front side in the progressive feed direction of the base material 11 to the first inner roller 41 and the second inner roller 41. The inner roller 42, the third inner roller 43, and the fourth inner roller 44 are used. The molding portions 51, 52, 53 and the bending back portion 54 are composed of the following combinations.

In the manufacturing apparatus 20 of the present embodiment, the first forming portion 51, which is a portion for first bending the base metal 11, is composed of a first outer roller 31, a second outer roller 32, and a first inner roller 41. The first inner roller 41 is arranged in the middle of the arrangement direction of the two outer rollers (the first outer roller 31 and the second outer roller 32). When the base material 11 passes through the first forming portion 51, it is bent in the width direction and formed into an arc shape having a radius of R1.

Further, the second forming portion 52, which is a portion for bending the base material 11 after the bending process by the first forming portion 51, is composed of a second outer roller 32, a third outer roller 33, and a second inner roller 42. To. The second inner roller 42 is arranged in the middle of the arrangement direction of the two outer rollers (the second outer roller 32 and the third outer roller 33). The base metal 11 is bent in the width direction when passing through the second forming portion 52, and is formed into an arc shape having a radius of R2. In this embodiment, the radius R2 of the base material 11 bent by the second forming portion 52 is smaller than the radius R1 of the base material 11 bent by the first forming portion 51 (R2 <R1).

Further, the third forming portion 53, which is a portion for bending the base material 11 after bending by the second forming portion 52, is composed of a third outer roller 33, a fourth outer roller 34, and a third inner roller 43. To. The third inner roller 43 is arranged in the middle of the arrangement direction of the two outer rollers (third outer roller 33 and fourth outer roller 34). The base metal 11 is bent in the width direction when passing through the third forming portion 53, and is formed into an arc shape having a radius of R3. In the present embodiment, the radius R3 of the base material 11 bent by the third forming portion 53 is smaller than the radius R2 of the base material 11 bent by the second forming portion 52 (R3 <R2).

Further, the bending back portion 54, which is a portion for bending the base material 11 after bending by the third forming portion 53, is composed of a fourth outer roller 34, a fifth outer roller 35, and a fourth inner roller 44. .. The fourth inner roller 44 is arranged in the middle of the arrangement direction of the two outer rollers (the fourth outer roller 34 and the fifth outer roller 35). The base metal 11 is bent in the width direction when passing through the bending back portion 54, and is formed into an arc shape having a radius of R0. In the present embodiment, the radius R0 of the base material 11 bent by the bending back portion 54 is larger than the radius R3 of the base material 11 bent by the third forming portion 53, and the second forming portion 52 is formed. It is smaller than the radius R2 of the base material 11 bent by (R3 <R0 <R2 <R1).

In the present embodiment, the radius of the base metal 11 is gradually reduced through bending by the first forming portion 51, the second forming portion 52, and the third forming portion 53 (radius R1 → R2 → R3). In other words, the base material 11 is bent to one side in the width direction so that the bending angle of the base material 11 is gradually increased. In this embodiment, the bending amount V1 of the base material 11 by the first forming portion 51, the bending amount V2 of the base material 11 by the second forming portion 52, and the bending amount V3 of the base material 11 by the third forming portion 53. The relationship is determined so that the molded portion on the inner side in the progressive feed direction of the base metal 11 is larger (V1 <V2 <V3).

Further, in the present embodiment, after the base material 11 is bent to one side in the width direction through the bending process by the three forming portions 51, 52, 53, the base material 11 is bent in the width direction through the bending process by the bending back portion 54. Can be bent to the other side. In the bending process by the bending back portion 54, the base material 11 is bent in the direction of increasing the radius of the base material 11 (radius R3 → R0), in other words, in the direction of decreasing the bending angle of the base material 11.

In the present embodiment, the three forming portions 51, 52, 53 and the bending back portion 54 are provided so as to share a part of the processing roller 27 (specifically, the outer roller). Specifically, the second outer roller 32 is shared between the first forming portion 51 and the second forming portion 52, and the third outer roller 33 is shared between the second forming portion 52 and the third forming portion 53. The fourth outer roller 34 is shared by the third forming portion 53 and the bending back portion 54.

As shown in FIGS. 2 and 3, in this embodiment, eight of the nine processing rollers 27 are attached to the base portion 21 via the position adjusting portion 55. The remaining one of the nine processing rollers 27 is not provided with the position adjusting portion 55. The position adjusting portion 55 has a fixed portion 56 fixed to the base portion 21 and a movable portion 57 that can be slidably moved with respect to the fixed portion 56. A processing roller 27 is rotatably provided on the movable portion 57. In the manufacturing apparatus 20 of the present embodiment, the position of the processing roller 27 with respect to the base portion 21 can be changed by changing the position of the movable portion 57 with respect to the fixed portion 56. In the manufacturing apparatus 20 of the present embodiment, the base material 11 passes between the nine processing rollers 27 by adjusting the positions of the eight processing rollers 27 with respect to the base portion 21 through the setting of the eight position adjusting portions 55. Can be changed. This makes it possible to set the bending angle of the base material 11 by the forming portions 51, 52, 53 and the bending back portion 54, and eventually the radius of the laminated body 10 to an arbitrary value.

The base portion 21 is provided with three drive motors 29 for rotationally driving the processing roller 27. These drive motors 29 are one for each of the three processing rollers 27 (specifically, the third outer roller 33, the fourth outer roller 34, and the third inner roller 43) that constitute the third forming portion 53 (see FIG. 5). They are connected one by one. By rotationally driving the three processing rollers 27 constituting the third forming portion 53 by the drive motor 29, when the base material 11 passes through the third forming portion 53, the processing rollers 27 feed the base material 11 in the forward direction. It is possible to send it to. In the present embodiment, the drive motor 29 corresponds to the drive unit.

The manufacturing apparatus 20 of the present embodiment includes, for example, an electronic control device 60 configured around a microcomputer. A supply motor 26 and three drive motors 29 are connected to the electronic control device 60. The electronic control device 60 executes the operation control of the supply motor 26 and the operation control of the three drive motors 29 when the base material 11 is bent.

The operation control of the motors 26 and 29 is executed so that the pair of supply rollers 25 and the three processing rollers 27 rotate in synchronization with each other. Specifically, the operation control of the motors 26 and 29 is performed when the base metal 11 sequentially fed by the supply roller 25 of the supply unit 24 passes between the three processing rollers 27 constituting the third forming unit 53. It is performed in such a manner that the roller 27 can be rotated with respect to the base material 11 without slipping. In the manufacturing apparatus 20 of the present embodiment, when the base material 11 is bent, three processes constituting the third forming portion 53 are performed according to the speed of the base material 11 which is sequentially fed by the supply roller 25 which is driven to rotate. The base metal 11 can be fed in the forward feed direction by the roller 27, specifically, the processing roller 27 that is rotationally driven by the drive motor 29.

In the present embodiment, when the laminated body 10 is manufactured, the strip-shaped base material 11 is first formed into a spiral shape.
In the manufacturing apparatus 20 of the present embodiment, the base metal 11 is fed in the forward feed direction by a pair of supply rollers 25 that are rotationally driven. The base material 11 is supplied from the roll to the supply unit 24 having the pair of supply rollers 25 via the guide rollers 22.

Then, as shown in FIG. 5, the base material 11 advances in the progressive feed direction (direction indicated by the black arrow in the figure) and passes through the first forming portion 51, so that the base material 11 is bent in the width direction. It is formed into an arc shape having a radius of R1.

When the base material 11 further advances in the forward feed direction and passes through the second forming portion 52, the base material 11 is bent so as to increase the bending angle in the width direction, and the radius is R2 (however, R2 <R1) in an arc shape. Is molded into.

After that, when the base material 11 passes through the third forming portion 53, the base material 11 is bent so as to further increase the bending angle in the width direction, and the radius becomes an arc shape of R3 (however, R3 <R2). It is molded.

After that, when the base material 11 further advances in the forward feed direction and passes through the bending back portion 54, the base material 11 is bent so as to reduce the bending angle in the width direction, and the radius is R0 (however, R3 <R0 <R2). It is formed into an arc shape.

As described above, in the manufacturing apparatus 20 of the present embodiment, the base material 11 is passed through the base material 11 in the order of the first forming portion 51, the second forming portion 52, the third forming portion 53, and the bending back portion 54. Each part is formed into an arc shape having a predetermined bending angle (radius = R0). As a result, the spiral base material 11 is formed.

In the present embodiment, the cylindrical laminated body 10 is formed based on the spiral base material 11 thus formed. Specifically, first, the spiral base material 11 formed by the manufacturing apparatus 20 is cut to a predetermined length. After that, notches 12 provided at equal intervals on the outer peripheral end of the base material 11 by using a jig for alignment (not shown) are provided at five positions in the circumferential direction of the base material 11. In the above, the base material 11 is overlapped in the direction of the center line. As a result, the circumferential position of the portion of the base metal 11 forming each layer of the laminated body 10 is adjusted. Then, in that state, the inner surface of the notch portion 12 is continuously welded in the center line direction through laser welding. As a result, the portions forming each layer of the laminated body 10 in the base metal 11 are joined by laser welding. In this embodiment, the cylindrical laminate 10 (see FIG. 1) is manufactured in this way.

Hereinafter, the action and effect of the manufacturing apparatus 20 of the present embodiment will be described.
In general, when the bending amount of the base metal in one bending process is increased, the bending angle of each part of the base metal 11 tends to vary, for example, a part of the base metal (for example, a fragile portion) is deformed so as to bend. ..

In the present embodiment, the base material 11 is set in the width direction so that the radius of the base material 11 is gradually reduced through bending by the first forming portion 51, the second forming portion 52, and the third forming portion 53. Can be bent to one side. As a result, the bending amount of the base metal 11 in one bending process can be reduced. Therefore, it is possible to suppress the bending angle of the base material 11 from being partially increased, and to form the portions of the base material 11 constituting each layer of the laminated body 10 with high roundness. Therefore, the cylindrical laminated body 10 can be manufactured with high accuracy.

When the strip-shaped base material 11 is bent in the width direction, the bending amount of the relatively fragile part (hereinafter referred to as the fragile part) in the base material 11 is large, while the bending amount of the other parts is large. There is a possibility that the bending amount of each part of the base material 11 may vary, such as becoming smaller. In the present embodiment, the portion of the base material 11 in which the cutout portion 12 is formed corresponds to the fragile portion, and the bending angle may be partially increased in this fragile portion.

In the present embodiment, the base metal 11 is bent to one side in the width direction through bending by the first forming portion 51, the second forming portion 52, and the third forming portion 53, and then bent by the bending back portion 54. The base metal 11 is bent back to the other side in the width direction.

In this series of bending processes, the fragile portion in the base metal 11 (in the present embodiment, the cutout portion 12 is formed) in both the bending process by the forming portions 51, 52, 53 and the bending process by the bending back portion 54. The bending amount of the part) tends to be larger than the bending amount of the other parts. Therefore, according to the present embodiment, as shown in FIG. 6, the fragile portion of the base metal 11 is greatly bent in one direction as compared with the other portions due to the bending process by the three forming portions 51, 52, 53. In some cases (see the alternate long and short dash line in FIG. 6), in the subsequent bending process by the bending back portion 54, the fragile portion is bent significantly in the other direction as compared with the other portions, so that the excessively bent portion is bent in the opposite direction. Can be returned (see the solid line in FIG. 6). As a result, the difference in bending angle between the fragile portion of the base metal 11 and the other portions can be reduced, so that the variation in the bending angle in each portion of the base metal 11 can be suppressed. Note that FIG. 6 shows the bending amount of the base material 11 exaggerated from the actual bending amount in order to facilitate the understanding of the bending process of the base material 11 by the bending back portion 54.

In the bending process of bending the strip-shaped base material 11 in the width direction, compressive stress is likely to occur in the inner portion of the base material 11 in the bending direction, and this compressive stress may cause the portion to become unnecessarily thick or wavy. There is.

As shown in FIGS. 2 and 5, in the present embodiment, the three processing rollers 27 (specifically, the third outer roller 33, the fourth outer roller 34, and the third inner roller 43) constituting the third forming portion 53 are formed. ), A drive motor 29 is connected to each. Then, when the base metal 11 is bent by the manufacturing apparatus 20, the operation control of each drive motor 29 is executed, and the three processing rollers 27 constituting the third forming portion 53 are rotationally driven.

According to the present embodiment, the base material 11 can be bent by the manufacturing apparatus 20 while the base material 11 is fed out in the forward feed direction by the three processing rollers 27 that are rotationally driven in this way. Therefore, when the base material 11 is bent by the three forming portions 51, 52, 53, the base material 11 can be smoothly sent out from the forming portions 51, 52, 53. As a result, the compressive stress generated in the inner portion of the base metal 11 in the bending direction can be reduced.

In the present embodiment, the bending amount of the base material 11 by the three forming portions 51, 52, 53 is determined so that the bending amount of the base material 11 by the third forming portion 53 is the largest. From this, it can be said that when the base material 11 is bent by the third forming portion 53 having the largest bending amount, the compressive stress generated in the inner portion of the base material 11 in the bending direction tends to increase.

In the present embodiment, the three processing rollers 27 constituting the third forming portion 53 are rotationally driven by the drive motor 29. Therefore, the bending process of the base material 11 by the third forming portion 53, in which the compressive stress tends to be large, is performed while feeding the base material 11 from the third forming portion 53 in the forward feed direction through the rotational drive of the three processing rollers 27. Can be done. As a result, the compressive stress generated when the base material 11 is bent by the third forming portion 53 can be accurately suppressed.

Moreover, in the present embodiment, such a third forming portion 53 is arranged on the innermost side in the progressive feed direction of the base metal 11 among the three forming portions 51, 52, 53. Therefore, the bending process of the base material 11 by the first forming portion 51 and the second forming portion 52 arranged on the front side in the progressive feed direction is carried out through the rotational drive of the three processing rollers 27 constituting the third forming portion 53. The material 11 can be pulled toward the back side in the progressive feed direction. As a result, when the base material 11 is bent by the three forming portions 51, 52, 53, the base material 11 can be smoothly sent out from the forming portions 51, 52, 53, so that the inside of the base material 11 in the bending direction. The compressive stress generated in the portion of can be reduced.

According to the present embodiment, in this way, the compressive stress generated in the portion inside the bending direction of the base material 11 during the bending process of the base material 11 can be suppressed to a small value, so that the compression stress generated inside the bending direction of the base material 11 can be suppressed to a small size. It is possible to prevent the portion from becoming unnecessarily thick or wavy. As a result, the cylindrical laminated body 10 can be manufactured with high accuracy.

As described above, according to the present embodiment, the effects described below can be obtained.
(1) The first molding section 51, the second molding section 52, and the third molding section 53 are arranged in such a manner that they are arranged side by side in the progressive feed direction of the base metal 11. Therefore, by using the molded portions 51, 52, and 53, the portions forming each layer of the laminated body 10 in the base material 11 can be molded with high roundness. Therefore, the laminated body 10 can be manufactured with high accuracy.

(2) The base material 11 is placed on one side in the width direction so that the radius of the base material 11 is gradually reduced through bending by the first molding portion 51, the second molding portion 52, and the third molding portion 53. Can be bent into. Therefore, it is possible to suppress the bending angle of the base material 11 from being partially increased, and to form the portions of the base material 11 constituting each layer of the laminated body 10 with high roundness.

(3) The three machining rollers 27 constituting the third forming portion 53 having the largest bending amount include a drive motor 29 that rotationally drives the machining rollers 27 in a manner in which the base metal 11 is sequentially fed by the machining rollers 27. It is provided. Therefore, when the base material 11 is bent by the manufacturing apparatus 20, it is possible to prevent the inner portion of the base material 11 from being unnecessarily thickened or having a wavy shape.

(4) Although the laminated body 10 is manufactured by using the base material 11 having the notch portion 12, the laminated body 10 can be manufactured with high accuracy.
(5) A bending back portion that is arranged on the back side of the base material 11 in the progressive feed direction from the three forming portions 51, 52, 53 and bends the base material 11 in a direction that reduces the bending angle of the base material 11. Has 54. As a result, it is possible to suppress variations in the bending angle in each part of the base metal 11.

The above embodiment can be modified and implemented as follows. The above embodiment and the following modification examples can be implemented in combination with each other within a technically consistent range.

As a method for joining each layer of the laminated body 10, any joining method such as a joining method by caulking or a joining method using an adhesive can be adopted. Further, the joining portion for joining the portions forming each layer of the laminated body 10 in the base material 11 is not limited to the portion provided with the cutout portion 12, and can be arbitrarily set.

The first forming portion 51, the second forming portion, the third forming portion 53, and the bending back portion 54 are each composed of three dedicated processing rollers 27 without sharing a part of the processing rollers 27. It may be provided in an embodiment.

The execution mode of the operation control of the supply motor 26 and the execution mode of the operation control of the three drive motors 29 can be arbitrarily changed as long as the base metal 11 can be smoothly fed in the forward feed direction. For example, the speed at which the base material 11 (specifically, the portion in contact with the supply roller 25) is sent out in the forward feed direction by the supply roller 25 and the base material 11 (specifically, the portion in contact with the processing roller 27) by the processing roller 27. The operation control of the supply motor 26 and the operation control of the three drive motors 29 may be executed so that the speed of delivery in the forward feed direction is the same. Such a configuration can be realized by executing the operation control of the motors 26 and 29 so that the value (= RR × RV) obtained by multiplying the radius RR of the roller by the rotation speed RV of the roller becomes the same value. can.

The drive motor 29 for rotationally driving the machining roller 27 is provided in place of or in combination with the three machining rollers 27 constituting the third forming portion 53, or in combination with the three machining rollers 27 constituting the bending back portion 54. It may be provided.

According to the same configuration, the bending process of the base material 11 by the bending back portion 54 is carried out by the three processing rollers 27 constituting the bending back portion 54, and the entire portion of the base material 11 that has been bent is sent out in the forward feed direction. You can do it while doing it. Moreover, regarding the bending process of the base material 11 by the three forming portions 51, 52, 53, the base material 11 is bent back to the bending back portion 54 side by the three processing rollers 27 constituting the bending back portion 54, that is, the back in the forward feed direction. It can be done while pulling to the side. As a result, when the base material 11 is bent by the three forming portions 51, 52, 53 and the bending back portion 54, the base material 11 is smoothly sent out from the forming portions 51, 52, 53 and the bending back portion 54. Can be done. Therefore, at this time, the compressive stress generated in the inner portion of the base metal 11 in the bending direction can be reduced.

The processing roller 27 to be provided with the drive motor 29 can be arbitrarily set.
In the same configuration, it is preferable to provide the drive motor 29 in at least one of the four inner rollers 41 to 44. According to the same configuration, since the inner roller in contact with the inner portion of the base material 11 in the bending direction is rotationally driven, the inner roller 11 is used to bend the base material 11 by the forming portions 51, 52, and 53. The inner part of the bending direction can be sent out in the forward feeding direction. As a result, the inner portion of the base metal 11 in the bending direction can be smoothly sent out from the molded portions 51, 52, 53.

In the above configuration, the drive motor 29 can be provided on the third inner roller 43 constituting the third forming portion 53 having the largest bending amount. According to the same configuration, the bending process of the base material 11 by the third forming portion 53 in which the compressive stress tends to increase is performed by rotating the third inner roller 43 to feed the base material 11 in the forward feed direction from the third forming portion 53. It can be done while sending out.

-The bending back portion 54 may be omitted.
The three molded portions 51, 52, and 53 are not limited to be provided, and only two molded portions for bending the base material 11 in the width direction may be provided, or four or more molded portions may be provided.

A plurality of molding portions are provided so that the bending angle of the base material 11 by the first molding portion on the front side in the progressive feed direction and the bending angle of the base metal 11 by the second molding portion on the back side in the progressive feed direction are the same. You may do so. According to the same configuration, a laminated body using a plurality of molded portions, such as bending the base material 11 to a predetermined angle by the first molded portion and then correcting the bending angle of the base material 11 by the second molded portion. Each of the 10 layers can be molded with high roundness.

As the plate material constituting the base material 11, a plate material made of an iron-based metal material other than steel, a plate material made of aluminum (or an aluminum alloy), a copper plate, or a metal plate other than the steel plate can be adopted. If a metal plate softer than a steel plate (for example, an aluminum plate or a copper plate) is used as the base material, the base material is bent in the width direction to form each layer of the tubular laminate into an annular shape. Since the buckling phenomenon that the material bends easily occurs, the molding process becomes difficult. According to the manufacturing apparatus according to the above embodiment, the base metal made of such a soft metal plate can be bent in the width direction so as to gradually reduce the radius. As a result, the bending amount of the base metal in one bending process can be reduced, so that the bending process of the base metal can be performed while suppressing the occurrence of the buckling phenomenon. Therefore, according to the above-mentioned manufacturing apparatus, even when a soft metal plate is adopted as a base material, a cylindrical laminate can be manufactured with high accuracy.

-The manufacturing apparatus according to the above embodiment can also be applied to a tubular laminated body made of a base material having a notch on the inside in the bending direction. Further, the manufacturing apparatus according to the above embodiment can also be applied to a tubular laminated body made of a base material having no notch.

10 ... Laminated body 11 ... Base material 12 ... Notch part 20 ... Manufacturing equipment 24 ... Supply part 25 ... Supply roller 26 ... Supply motor 27 ... Processing roller 29 ... Drive motor 31 ... First outer roller 32 ... Second outer roller 33 ... 3rd outer roller 34 ... 4th outer roller 35 ... 5th outer roller 41 ... 1st inner roller 42 ... 2nd inner roller 43 ... 3rd inner roller 44 ... 4th inner roller 51 ... 1st molding part 52 ... 1st 2 Molding part 53 ... 3rd molding part 54 ... Bending back part 60 ... Electronic control device

Claims (7)

The molding section includes a molding section for forming each layer of the tubular laminate in an annular shape by bending the strip-shaped base metal in the width direction, and a supply section for sequentially feeding the base metal to supply the molding section. , Two outer rollers lined up in the length direction of the base material in a manner in contact with the outside in the bending direction of the base material, and arranged in the middle of the arrangement direction of the two outer rollers in a manner in contact with the inside in the bending direction of the base material. In a tubular laminate manufacturing apparatus comprising one inner roller and the like.
An apparatus for manufacturing a tubular laminated body, characterized in that a plurality of the molded portions are provided in a manner in which the base materials are arranged in a progressive direction. Among the plurality of molded portions, the molded portion on the front side in the progressive feeding direction bends the base metal to the first bending angle.
The cylinder according to claim 1, wherein the molded portion on the back side of the plurality of molded portions in the progressive direction bends the base material to a second bending angle larger than the first bending angle. Equipment for manufacturing shaped laminates. Claims that the three rollers constituting the molded portion having the largest bending amount in the width direction are provided with a drive portion for rotationally driving the roller in a manner in which the base material is sequentially fed by the rollers. Item 2. The apparatus for manufacturing a tubular laminate according to Item 2. At least one of the plurality of inner rollers constituting a part of the plurality of molded portions is provided with a drive portion for rotationally driving the inner rollers in a manner in which the base metal is sequentially fed by the inner rollers. The apparatus for manufacturing a tubular laminate according to claim 1 or 2. The apparatus for manufacturing a tubular laminate according to any one of claims 1 to 4, wherein the base material has a notch having a notched end in the width direction. The two outer rollers lined up in the length direction of the base material in contact with the outside in the bending direction of the base material and the two outer rollers arranged in the middle of the arrangement direction of the two outer rollers in the form of contacting the inside in the bending direction of the base material. It has one inner roller, is arranged on the back side in the progressive direction from the plurality of molded portions, and has a bending back portion for bending the base metal in a direction of reducing the bending angle of the base metal. The apparatus for manufacturing a tubular laminate according to any one of claims 1 to 5. The apparatus for manufacturing a tubular laminate according to any one of claims 1 to 6, wherein the base material is a metal plate.

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