CN113020363A - Rolling mechanism for incremental rolling forming - Google Patents

Rolling mechanism for incremental rolling forming Download PDF

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Publication number
CN113020363A
CN113020363A CN202110193247.XA CN202110193247A CN113020363A CN 113020363 A CN113020363 A CN 113020363A CN 202110193247 A CN202110193247 A CN 202110193247A CN 113020363 A CN113020363 A CN 113020363A
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CN
China
Prior art keywords
roller
mounting
hole
bottom cover
platform
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Pending
Application number
CN202110193247.XA
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Chinese (zh)
Inventor
蒋兰芳
任文杰
王丽辉
梁晓军
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Zhijiang College of ZJUT
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Zhijiang College of ZJUT
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Application filed by Zhijiang College of ZJUT filed Critical Zhijiang College of ZJUT
Priority to CN202110193247.XA priority Critical patent/CN113020363A/en
Publication of CN113020363A publication Critical patent/CN113020363A/en
Pending legal-status Critical Current

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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B21MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21DWORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D15/00Corrugating tubes
    • B21D15/12Bending tubes into wave form

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Transmission Devices (AREA)

Abstract

The invention discloses a rolling mechanism for rolling incremental forming, which comprises a roller set, a support rod, a connecting rod, a round bottom cover and a lead screw nut, wherein the roller set is arranged on the support rod; the supporting rod is provided with a T-shaped groove, more than 2T-shaped guide rails are uniformly distributed on the circular bottom cover, and the T-shaped groove of the supporting rod is movably arranged on the T-shaped guide rails of the circular bottom cover; the roller group is arranged at one end of the supporting rod; the other end of the supporting rod is connected with one end of the connecting rod, and the other end of the connecting rod is connected with the screw nut. The invention can roll-form the corrugated pipe or the bulging pipe with high corrugation height and narrow corrugation width, and has the advantages of simple operation, strong universality, good synchronism and stable and reliable structure.

Description

Rolling mechanism for incremental rolling forming
Technical Field
The invention relates to a rolling mechanism for rolling incremental forming.
Background
The metal corrugated pipe is a pipe part with regular wavy shape and transverse corrugations. The elastic component has high bending fatigue strength and elastic stability, can generate axial, transverse and angular displacements under the action of external force, is often used as an elastic element for manufacturing compensators, flexible connecting pieces, heat exchangers and the like, and is widely applied to various fields of aerospace, electric instruments, petrochemical industry, automobiles, ships and the like.
The forming process of the corrugated pipe comprises mechanical forming, hydraulic forming, welding forming and the like. The hydroforming process is relatively complex, and has certain limitation on the shape of the corrugation, so that the corrugated pipe with high corrugation height and narrow corrugation width is not easy to form. The mechanical bulging is usually formed by radially expanding and bulging a plurality of die sections, the forming quality is not easy to control, and the die sections are all designed in a targeted manner, so that the universality is not strong.
Disclosure of Invention
Aiming at the defects of the prior art, the invention provides the rolling mechanism for the rolling incremental forming, which can roll and form the corrugated pipe or the bulging pipe with high corrugation height and narrow corrugation width, and has the advantages of high modularization degree, strong universality, stable and reliable structure.
In order to achieve the purpose, the technical scheme adopted by the invention is as follows:
a rolling mechanism for rolling incremental forming comprises a roller set, a support rod, a connecting rod, a round bottom cover and a lead screw nut; the supporting rod is provided with a T-shaped groove, more than 2T-shaped guide rails are uniformly distributed on the circular bottom cover, and the T-shaped groove of the supporting rod is movably arranged on the T-shaped guide rails of the circular bottom cover; the roller group is arranged at one end of the supporting rod; the other end of the supporting rod is connected with one end of the connecting rod, and the other end of the connecting rod is connected with the screw nut.
The roller group consists of a first roller and a second roller; a bearing mounting hole is formed in one end of the supporting rod, and a deep groove ball bearing is mounted in the bearing mounting hole; a first roller is arranged on the deep groove ball bearing positioned at one side of the supporting rod, and a second roller is arranged on the deep groove ball bearing positioned at the other side of the supporting rod; the second roller is fixedly connected with the first roller through a screw and a nut;
a limiting platform is further arranged on the supporting rod below the bearing mounting hole, a switching connecting platform is arranged on the side surface of the other end of the supporting rod, and a T-shaped groove is formed in the side surface of the supporting rod; the switching connecting platform is provided with a shaft mounting through hole and is connected with the connecting rod through the shaft mounting through hole;
the two ends of the connecting rod are integrally provided with connecting platforms, and the side surfaces of the connecting platforms are provided with connecting platform mounting through holes; connecting blocks which are equal in number and correspond to the connecting rods in position are mounted on the outer side of the screw nut, connecting block mounting holes are formed in the connecting blocks, screw nut internal threads are formed in the hollow inner side of the screw nut, and the screw nut internal threads are connected with a roller transmission mechanism of the rolling forming mechanism; the connecting platform at one end of the connecting rod is connected with the shaft mounting through hole of the connecting platform on the supporting rod through a connecting platform mounting through hole by a pin, and the connecting platform at the other end of the connecting rod is connected with the connecting block mounting hole of the connecting block on the screw nut through the connecting platform mounting through hole by the pin;
t-shaped guide rails corresponding to the number of the T-shaped grooves in the supporting rod are uniformly arranged on the circular bottom cover, a threaded hole is formed in the middle of one side, provided with the T-shaped guide rails, of the circular bottom cover, mounting platforms are uniformly arranged on the circumferential edge of one side, provided with the T-shaped guide rails, of the circular bottom cover, and the distribution positions of the mounting platforms are the circumferential edges of the circular bottom cover between every 2T-shaped guide rails; the mounting platform is provided with a mounting platform mounting hole; and a circular bottom cover fixing block is arranged on the other side of the circular bottom cover, and a circular bottom cover connecting hole and a fastening hole for fixing the circular bottom cover and the circular bottom cover fixing block are formed in the circular bottom cover fixing block.
The first roller is a roller with one surface being a curved surface and the other surface being a plane; the upper plane side of the first roller is provided with a bearing mounting hole and a first ring groove for mounting the deep groove ball bearing, the middle position of the upper plane side of the first roller is provided with a screw mounting through hole, the first roller at the periphery of the screw mounting through hole is provided with a shaft surface matched with an inner hole of the deep groove ball bearing, and the first roller at the bottom of the shaft surface is provided with a step-shaped shaft shoulder; a first concave table is arranged in the middle of the curved surface of the first roller on the curved surface side of the first roller, and the first concave table is communicated with the center of the screw mounting through hole;
the second roller is also a roller with one surface being a curved surface and the other surface being a plane; the upper plane side of the second roller is provided with a shaft surface mounting concave platform matched with the shaft surface of the first roller for use; a nut mounting through hole is formed in the middle of the upper plane side of the second roller, a bearing mounting hole and a second ring groove for mounting a deep groove ball bearing are formed in the periphery of the shaft surface mounting concave table, and a bearing positioning boss matched with a stepped shaft shoulder on the first roller is formed between the second ring groove and the shaft surface mounting concave table; and a second concave table is arranged in the middle of the curved surface of the second roller on the curved surface side of the second roller, and the center positions of the second concave table, the nut mounting through hole, the axial surface mounting concave table, the second ring groove and the bearing positioning boss are communicated.
The curved surface shapes of the first roller curved surface and the second roller curved surface are consistent with the corrugated shape required to be formed by rolling.
The invention has the following beneficial effects:
(1) the invention provides a rolling mechanism for rolling incremental forming based on an incremental forming technology, wherein a roller is in rolling contact with a pipe, the friction force is small, a plurality of pairs of roller groups simultaneously roll and form the pipe, the stress on the pipe is uniform, and the forming quality is good.
(2) The curved surface shape of the roller is consistent with the waveform of the corrugated pipe required to be rolled, the roller can be independently replaced according to different corrugated shapes, the operation is simple, and the universality is high.
(3) The shaft shoulder of the first roller and the bearing positioning boss of the second roller axially position the deep groove ball bearing, so that the mechanism has better and more stable running precision; the first ring groove and the second ring groove are arranged on the connecting rod and the deep groove ball bearing in a yielding mode, so that the connecting rod and the deep groove ball bearing are prevented from being mounted and moved, and the mechanism is more effective and reliable.
(4) The roller train is installed in the one end of bracing piece, and the bracing piece is installed on the T shape guide rail of circular bottom, and the slip through the bracing piece on circular bottom T shape guide rail is outwards released the roller train, and stable in structure is reliable. Meanwhile, one end of the connecting rod is connected with the supporting rod, and the other end of the connecting rod is connected with the screw nut, so that the roller group can realize synchronous pushing and roll forming operations, and the synchronism is good.
The invention can roll and form the corrugated pipe or the bulging pipe with high corrugation height and narrow corrugation width, and has the advantages of simple operation, strong universality, good synchronism and stable and reliable structure.
Drawings
FIG. 1 is a schematic view of the overall structure of the present invention;
FIG. 2 is an enlarged sectional view of the mounting structure of the roller assembly of FIG. 1;
FIG. 3 is an enlarged schematic view of the support rod of FIG. 1;
FIG. 4 is a rear view of the support pole of FIG. 3;
FIG. 5 is an enlarged cross-sectional view of the first roller of FIG. 2;
FIG. 6 is an enlarged cross-sectional view of the second roller of FIG. 2;
FIG. 7 is an enlarged view of the circular bottom cover of FIG. 1;
FIG. 8 is a rear view of FIG. 7;
FIG. 9 is an enlarged schematic view of the connecting rod of FIG. 1;
fig. 10 is an enlarged schematic view of the screw nut of fig. 1.
Detailed Description
As shown in fig. 1 to 10, the rolling mechanism for incremental rolling forming of the present embodiment includes a roller set 1, a support rod 2, a connecting rod 3, a circular bottom cover 4 and a lead screw nut 5; the support rod 2 is provided with a T-shaped groove 24, the round bottom cover 4 is uniformly provided with 6T-shaped guide rails 41, and the T-shaped groove 24 of the support rod 2 is movably arranged on the T-shaped guide rail 41 of the round bottom cover 4; the roller group 1 is arranged at one end of the supporting rod 2; the other end of bracing piece 2 links to each other with the one end of connecting rod 3, the other end of connecting rod 3 links to each other with screw nut 5.
The roller group 1 is provided with 6 groups; respectively consists of a first roller 11 and a second roller 12; a bearing mounting hole 21 is formed in one end of the support rod 2, and a deep groove ball bearing 13 is mounted in the bearing mounting hole 21; a first roller 11 is arranged on the deep groove ball bearing 13 positioned at one side of the supporting rod 2, and a second roller 12 is arranged on the deep groove ball bearing 13 positioned at the other side of the supporting rod 2; the second roller 12 is fixedly connected with the first roller 11 through a screw 14 and a nut 15;
a limiting platform 22 is further arranged on the supporting rod 2 below the bearing mounting hole 21, a switching connecting platform 23 is arranged on the side surface of the other end of the supporting rod 2, and a T-shaped groove 24 is formed in the side surface of the supporting rod 2; the transfer connecting platform 23 is provided with a shaft mounting through hole 231, and the transfer connecting platform 23 is connected with the connecting rod 3 through the shaft mounting through hole 231;
the two ends of the connecting rod 3 are integrally provided with connecting platforms 31, and the side surfaces of the connecting platforms 31 are provided with connecting platform mounting through holes 32; the outer side of the screw nut 5 is provided with connecting blocks 51 which are equal in number (6) to the connecting rods 3 and correspond in position, connecting block mounting holes 52 are formed in the connecting blocks 51, screw nut internal threads 53 are formed in the hollow inner side of the screw nut 5, and the screw nut internal threads 53 are connected with a transmission mechanism; the connecting platform 31 at one end of the connecting rod 3 is connected with the shaft mounting through hole 231 of the connecting platform 23 on the support rod 2 through the connecting platform mounting through hole 32 by a pin, and the connecting platform 31 at the other end of the connecting rod 3 is connected with the connecting block mounting hole 52 of the connecting block 51 on the screw nut 5 through the connecting platform mounting through hole 32 by a pin;
a screw hole 42 is formed in the middle of one side of the circular bottom cover 4, which is provided with the T-shaped guide rails 41, 6T-shaped guide rails 41 are uniformly arranged on the circular bottom cover 4, mounting platforms 43 are uniformly arranged on the circumference of one side of the circular bottom cover 4, which is provided with the 6T-shaped guide rails 41, and the distribution positions of the mounting platforms 43 are the circumference of the circular bottom cover 4 between every 2T-shaped guide rails 41; the mounting platform 43 is provided with a mounting platform mounting hole 44; a round bottom cover fixing block 47 is arranged on the other side of the round bottom cover 4, and a round bottom cover connecting hole 45 and a fastening hole 46 for fixing the round bottom cover 4 and the round bottom cover fixing block 47 are formed in the round bottom cover fixing block 47.
The first roller 11 is a roller with one surface being a curved surface and the other surface being a plane; a bearing mounting hole 21 and a first ring groove 113 for mounting the deep groove ball bearing 13 are formed in the upper plane side of the first roller 11, a screw mounting through hole 116 is formed in the middle position of the upper plane side of the first roller 11, a shaft surface 111 matched with an inner hole of the deep groove ball bearing 13 is formed in the first roller 11 at the periphery of the screw mounting through hole 116, and a stepped shaft shoulder 112 is formed in the first roller 11 at the bottom of the shaft surface 111; a first concave platform 114 is arranged in the middle of a first roller curved surface 115 on the upper curved surface side of the first roller 11, and the first concave platform 114 is communicated with the center of a screw mounting through hole 116;
the second roller 12 is also a roller with one curved surface and one flat surface; an axial surface mounting concave table 121 matched with the axial surface 111 of the first roller 11 is arranged on the upper plane side of the second roller 12; a nut mounting through hole 126 is formed in the middle of the upper plane side of the second roller 12, a bearing mounting hole 21 and a second annular groove 123 for mounting the deep groove ball bearing 13 are formed in the periphery of the shaft surface mounting concave table 121, and a bearing positioning boss 122 matched with the stepped shaft shoulder 112 on the first roller 11 is formed between the second annular groove 123 and the shaft surface mounting concave table 121; a second concave platform 124 is arranged in the middle of a second roller curved surface 125 on the upper curved surface side of the second roller 12, and the second concave platform 124, the nut mounting through hole 126, the axial surface mounting concave platform 121, the second ring groove 123 and the bearing positioning boss 122 are communicated in the center.
The shaft surface 111 of the first roller 11 is installed in the inner hole of the deep groove ball bearing 13, the other end of the first roller is installed in the shaft surface installation concave platform 121 of the second roller 12, and the shaft shoulder 112 of the first roller 1 and the bearing positioning convex platform 122 of the second roller 12 are matched for use to axially position the deep groove ball bearing; the first ring groove 113 and the second ring groove 123 are used for supporting the connecting rod 3 and the deep groove ball bearing 13 to be placed so as not to influence the installation and the movement of the connecting rod 3 and the deep groove ball bearing 13. The first concave platform 114 of the first roller 11 and the second concave platform 124 of the second roller 12 are used for installing the screw 14 and the nut 15, and the screw 14 and the nut 15 are ensured to be both in the first roller curved surface 115 of the first roller 11 and the second roller curved surface 125 of the second roller 12, so that the rolling bulging quality of the metal pipe is not affected.
The curved surface shapes of the first roller curved surface 115 and the second roller curved surface 125 conform to the desired roll-formed corrugated shape. Can be individually replaced in pairs according to different corrugated shapes.
When the deep groove ball bearing is installed, firstly, the deep groove ball bearing 13 is installed in the bearing installation hole 21 of the support rod 2, the shaft surface 111 of the first roller 11 is installed in the inner hole of the deep groove ball bearing 13 from one side of the support rod 2, the second roller 12 is installed at the other side of the support rod 2, and the shaft surface 111 of the first roller 11 is installed in the shaft surface installation concave platform 121 of the second roller 12; and then, the screw 14 sequentially passes through the screw mounting through hole 116 of the first roller 11, the deep groove ball bearing 13 and the nut mounting through hole 126 of the second roller 12 from the first concave platform 114, and the nut 15 is screwed into the second concave platform 124 to be fixedly connected with the screw 14, and the screw 14 and the nut 15 are ensured to be both in the first roller curved surface 115 of the first roller 11 and the second roller curved surface 125 of the second roller 12, so that the rolling and bulging quality of the metal pipe fitting is not influenced.
Then, the T-shaped grooves 24 of the 6 support rods 2 are respectively installed on the 6T-shaped guide rails 41 of the circular bottom cover 4, the roller sets 1 of the support rods 2 are positioned at the outer side of the circular bottom cover 4, and the limiting platform 22 is used for preventing the first roller 11 and the second roller 22 from contacting with the circular bottom cover 4; the connecting platform 31 at one end of the connecting rod 3 is connected with the switching connecting platform 23 of the support rod 2 through a pin, and the connecting platform 31 at the other end of the connecting rod 3 is connected with the connecting block 51 of the screw nut 5 through a pin.
According to the rolling mechanism for the rolling incremental forming based on the incremental forming technology, the rollers are in rolling contact with the pipe, the friction force is small, multiple pairs of roller groups simultaneously perform rolling forming on the pipe, the pipe is uniformly stressed, and the forming quality is good. And the curved surface shape of the roller is consistent with the waveform of the corrugated pipe required to be rolled, the roller can be independently replaced according to different corrugated shapes, and the corrugated pipe rolling device is simple to operate and high in universality. The shaft shoulder of the first roller and the bearing positioning boss of the second roller axially position the deep groove ball bearing, so that the running precision of the mechanism is better and more stable; the first ring groove and the second ring groove are arranged on the connecting rod and the deep groove ball bearing in a yielding mode, so that the connecting rod and the deep groove ball bearing are prevented from being mounted and moved, and the mechanism is more effective and reliable. And the roller group is arranged at one end of the supporting rod, the supporting rod is arranged on the T-shaped guide rail of the round bottom cover, the roller group is pushed out through the sliding of the supporting rod on the T-shaped guide rail of the round bottom cover, and the structure is stable and reliable. Meanwhile, one end of the connecting rod is connected with the supporting rod, and the other end of the connecting rod is connected with the screw nut, so that the roller group can realize synchronous pushing and roll forming operations, and the synchronism is good.
The corrugated pipe or the bulging pipe with high corrugation height and narrow corrugation width can be formed by rolling, and the corrugated pipe or the bulging pipe is simple to operate, high in universality, good in synchronism and stable and reliable in structure.

Claims (4)

1. A rolling mechanism for rolling incremental forming is characterized by comprising a roller set (1), a support rod (2), a connecting rod (3), a round bottom cover (4) and a lead screw nut (5); the support rod (2) is provided with a T-shaped groove (24), more than 2T-shaped guide rails (41) are uniformly distributed on the circular bottom cover (4), and the T-shaped groove (24) of the support rod (2) is movably arranged on the T-shaped guide rails (41) of the circular bottom cover (4); the roller group (1) is arranged at one end of the supporting rod (2); the other end of the supporting rod (2) is connected with one end of the connecting rod (3), and the other end of the connecting rod (3) is connected with the screw nut (5).
2. The rolling mechanism for roll incremental forming according to claim 1, wherein the roller group (1) is composed of a first roller (11) and a second roller (12); a bearing mounting hole (21) is formed in one end of the support rod (2), and a deep groove ball bearing (13) is mounted in the bearing mounting hole (21); a first roller (11) is arranged on the deep groove ball bearing (13) positioned at one side of the supporting rod (2), and a second roller (12) is arranged on the deep groove ball bearing (13) positioned at the other side of the supporting rod (2); the second roller (12) is fixedly connected with the first roller (11) through a screw (14) and a nut (15);
a limiting platform (22) is further arranged on the supporting rod (2) below the bearing mounting hole (21), a switching connecting platform (23) is arranged on the side surface of the other end of the supporting rod (2), and a T-shaped groove (24) is formed in the side surface of the supporting rod (2); a shaft mounting through hole (231) is formed in the transfer connecting platform (23), and the transfer connecting platform (23) is connected with the connecting rod (3) through the shaft mounting through hole (231);
the two ends of the connecting rod (3) are integrally provided with connecting platforms (31), and the side surfaces of the connecting platforms (31) are provided with connecting platform mounting through holes (32); the outer side of the screw nut (5) is provided with connecting blocks (51) which are equal in number and correspond to the connecting rods (3) in position, connecting block mounting holes (52) are formed in the connecting blocks (51), screw nut internal threads (53) are formed in the hollow inner side of the screw nut (5), and the screw nut internal threads (53) are connected with a transmission mechanism; the connecting platform (31) at one end of the connecting rod (3) is connected with the shaft mounting through hole (231) of the upper connecting platform (23) of the supporting rod (2) through a connecting platform mounting through hole (32) by a pin, and the connecting platform (31) at the other end of the connecting rod (3) is connected with the connecting block mounting hole (52) of the connecting block (51) of the screw nut (5) through the connecting platform mounting through hole (32) by a pin;
t-shaped guide rails (41) corresponding to the number of the T-shaped grooves (24) in the support rod (2) are uniformly arranged on the circular bottom cover (4), a screw hole (42) is formed in the middle of one side of the circular bottom cover (4) where the T-shaped guide rails (41) are arranged, mounting platforms (43) are uniformly arranged on the circumferential edge of one side of the circular bottom cover (4) where the T-shaped guide rails (41) are arranged, and the mounting platforms (43) are distributed on the circumferential edge of the circular bottom cover (4) between every 2T-shaped guide rails (41); the mounting platform (43) is provided with a mounting platform mounting hole (44); and a round bottom cover fixing block (47) is arranged on the other side of the round bottom cover (4), and a round bottom cover connecting hole (45) and a fastening hole (46) for fixing the round bottom cover (4) and the round bottom cover fixing block (47) are formed in the round bottom cover fixing block (47).
3. The rolling mechanism for incremental rolling according to claim 1, wherein the first roller (11) is a roller having a curved surface and a flat surface; a bearing mounting hole (21) and a first ring groove (113) for mounting the deep groove ball bearing (13) are formed in the upper plane side of the first roller (11), a screw mounting through hole (116) is formed in the middle of the upper plane side of the first roller (11), a shaft surface (111) matched with an inner hole of the deep groove ball bearing (13) is formed in the first roller (11) on the periphery of the screw mounting through hole (116), and a stepped shaft shoulder (112) is formed in the first roller (11) at the bottom of the shaft surface (111); a first concave table (114) is arranged in the middle of a first roller curved surface (115) on the upper curved surface side of the first roller (11), and the first concave table (114) is communicated with the center of a screw mounting through hole (116);
the second roller (12) is also a roller with one surface being a curved surface and the other surface being a plane; an axial surface mounting concave table (121) matched with the axial surface (111) on the first roller (11) is arranged on the upper plane side of the second roller (12); a nut mounting through hole (126) is formed in the middle of the upper plane side of the second roller (12), a bearing mounting hole (21) and a second ring groove (123) for mounting a deep groove ball bearing (13) are formed in the periphery of the shaft surface mounting concave table (121), and a bearing positioning boss (122) matched with a stepped shaft shoulder (112) on the first roller (11) is formed between the second ring groove (123) and the shaft surface mounting concave table (121); and a second concave table (124) is arranged in the middle of a second roller curved surface (125) on the upper curved surface side of the second roller (12), and the center positions of the second concave table (124), the nut mounting through hole (126), the axial surface mounting concave table (121), the second ring groove (123) and the bearing positioning boss (122) are communicated.
4. The rolling mechanism for progressive rolling according to claim 3, wherein the curved surface shape of the first roller curved surface (115) and the curved surface shape of the second roller curved surface (125) conform to a desired corrugated shape for rolling.
CN202110193247.XA 2021-02-20 2021-02-20 Rolling mechanism for incremental rolling forming Pending CN113020363A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202110193247.XA CN113020363A (en) 2021-02-20 2021-02-20 Rolling mechanism for incremental rolling forming

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202110193247.XA CN113020363A (en) 2021-02-20 2021-02-20 Rolling mechanism for incremental rolling forming

Publications (1)

Publication Number Publication Date
CN113020363A true CN113020363A (en) 2021-06-25

Family

ID=76460834

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202110193247.XA Pending CN113020363A (en) 2021-02-20 2021-02-20 Rolling mechanism for incremental rolling forming

Country Status (1)

Country Link
CN (1) CN113020363A (en)

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