A bidirectional bending machine

Abstract

The application provides a bidirectional bending machine, which comprises a clamping jaw arm, a lower jaw base, a clamping oil cylinder, a jaw group and a bending flap group; the clamping jaw arm is hinged to the lower jaw base and used as a fulcrum, two ends of the clamping oil cylinder are respectively hinged to the clamping jaw arm and the lower jaw base, the lower jaw base is provided with a first synchronous shaft, the first synchronous shaft is hinged to a torsion arm, and the torsion arm is hinged to the clamping jaw arm through a connecting rod, so that the clamping and loosening movement of the clamping jaw arm is realized in cooperation with the fulcrum; the jaw group is fixedly connected to the clamping jaw arm and the lower jaw base, and the bending flap group is connected to the clamping jaw arm and the lower jaw base through sliding connecting rods to realize bending movement. The application has the beneficial effects of improving work efficiency and product consistency and reducing labor cost.

Description

A bidirectional bending machine Technical Field

[0001] This invention belongs to the field of sheet metal processing equipment, and in particular relates to a bidirectional bending machine. Background Technology

[0002] Most bending machines on the market are currently single-station models, capable of only simple secondary bending. For complex multi-fold or long strip shapes, manual operation is still required, resulting in low efficiency. For certain special shapes, complex bending dies need to be custom-made. The design and manufacturing cycle of these dies is long, which is unfavorable for the production needs of multiple varieties in small batches. Existing single-station bending machines can only complete simple secondary bending, and most are mechanically driven, which is limited by the fatigue performance and rigidity of the transmission components, making their operation relatively cumbersome and difficult to achieve high-speed, high-frequency bending operations. This not only increases construction and operating costs but also affects production efficiency. Summary of the Invention

[0003] In view of this, the present invention aims to provide a bidirectional bending machine to improve work efficiency and product consistency, and reduce labor costs.

[0004] To achieve the above objectives, the technical solution of the present invention is implemented as follows:

[0005] A bending unit includes a clamping jaw arm, a lower jaw seat, a clamping cylinder, a jaw assembly, and a bending flap assembly. The clamping jaw arm is hinged to the lower jaw seat and serves as a fulcrum. The two ends of the clamping cylinder are respectively hinged to the clamping jaw arm and the lower jaw seat. The lower jaw seat is provided with a first synchronous shaft, and a torsion arm is hinged to the first synchronous shaft. The torsion arm is hinged to the clamping jaw arm through a connecting rod, which, together with the fulcrum, enables the clamping and releasing movements of the clamping jaw arm. The jaw assembly is fixedly connected to the clamping jaw arm and the lower jaw seat. The bending flap assembly is connected to the clamping jaw arm and the lower jaw seat through sliding connecting rods to realize the bending movement.

[0006] Furthermore, the clamping arm is hinged to the lower clamp seat via a double coaxial eccentric device. The double coaxial eccentric device includes an eccentric shaft, an eccentric sleeve, a torque arm, and an adjusting cylinder. The eccentric sleeve is mounted on the eccentric shaft, and its outer circle is hinged to both sides of the lower clamp seat. The clamping arm is hinged to the eccentric shaft, and the eccentric shaft is fixedly connected to one end of the torque arm. The other end of the torque arm is hinged to the adjusting cylinder, which is hinged to the lower clamp seat. The clamping arm can move slightly in the horizontal direction by adjusting the eccentric sleeve, and the clamping arm can move in the horizontal direction by controlling the adjusting cylinder.

[0007] Furthermore, the jaw assembly includes an upper jaw plate and a lower jaw plate. The upper jaw plate is fixed to the clamping jaw arm, and the lower jaw plate is fixed to the lower jaw base. The upper jaw plate and the lower jaw plate are arranged facing each other to form jaws. The upper jaw plate swings with the clamping jaw arm to realize the jaw assembly clamping the plate to be bent.

[0008] Furthermore, the sliding connecting rod is mounted on the clamping arm and the lower clamp seat via a slide rail, and the sliding connecting rod is also connected to the hydraulic cylinder to realize the forward and backward sliding of the sliding connecting rod; the bending flip plate assembly includes an upper flip plate and a lower flip plate. The upper flip plate is connected to the clamping arm via the sliding connecting rod, and the lower flip plate is connected to the lower clamp seat via the sliding connecting rod. The upper flip plate and the lower flip plate are arranged facing each other, and the bending movement of the flip plate is realized by the sliding connecting rod.

[0009] Furthermore, reinforcing plates are installed on the outer sides of the upper and lower flaps for bending thick plates to be bent; the upper flap retracts and the lower flap extends to bend the plate upwards; the upper flap extends and the lower flap retracts to bend the plate downwards.

[0010] Furthermore, a bidirectional bending machine includes the aforementioned bending unit, comprising a cutting device, a base frame, and a sheet positioning and clamping device;

[0011] Several bending units are mounted in parallel on the base frame, and the bending flap, the double coaxial eccentric device, and the first synchronous shaft rigidly connect the bending units into one unit;

[0012] Several sheet metal positioning and clamping devices are located between each bending unit to clamp and transport the sheet metal to be bent to the bending work area.

[0013] The cutting device is mounted on the lower flip plate via a slide rail and is used for roll shearing of sheet metal.

[0014] Furthermore, a stop is provided on one side of the upper jaw plate, and the sheet metal positioning and clamping device is provided with a corresponding blocking unit. The stop and the blocking unit cooperate to limit the upper jaw plate. The sheet metal positioning and clamping device includes a second synchronous shaft, a pulley group, a drive motor, a slide table, a slide rail, and a tensioning sleeve. The sheet metal to be bent is placed on the slide table. The drive motor is connected to the pulley group, the pulley group is connected to the slide table via a belt, and the slide table is slidably connected to the slide rail to drive the slide table to slide on the slide rail. The second synchronous shaft is connected to the pulley group via a bearing, and the tensioning sleeve is fixedly connected to the second synchronous shaft and the pulley group respectively to drive the second synchronous shaft and the pulley group to rotate synchronously.

[0015] Furthermore, the second synchronous shaft, pulley group, drive motor, slide table, and slide rail form an independent drive group for driving the movement of a single sheet positioning and clamping device; the second synchronous shaft, pulley group, drive motor, slide table, slide rail, and tensioning sleeve form an active drive group for driving the second synchronous shaft and pulley group to rotate synchronously; the second synchronous shaft, pulley group, slide table, and slide rail form a passive drive group for passively synchronizing with the clamping movement of the active drive group.

[0016] Furthermore, the cutting device includes a roller shear head, a transition plate, a hydraulic motor, a bearing seat, a transmission chain, and a guide rail. The guide rail is horizontally fixed on the base frame. The roller shear head is connected to the lower flip plate and is also fixedly connected to the transition plate. The transition plate is slidably connected to the guide rail. The hydraulic motor and the bearing seat are fixed on the base frame. The hydraulic motor is connected to the transition plate through the transmission chain and is used to drive the transition plate to slide on the slide rail. The bearing seat is connected to the transmission chain to achieve tensioning of the transmission chain.

[0017] Furthermore, the cutting device also includes a guide wheel, which is located on the back of the roller shear head and is rotatably connected to the roller shear head for supporting the bent sheet material.

[0018] Compared with the prior art, the bidirectional bending machine of the present invention has the following advantages:

[0019] (1) The bidirectional bending machine of the present invention adopts multiple synchronous shaft devices to ensure the synchronous operation of each bending unit, realizes synchronous motion from a mechanical point of view, improves equipment reliability, and reduces equipment manufacturing cost.

[0020] (2) The bidirectional bending machine of the present invention has a plate positioning and clamping device that achieves plate clamping or inclined feeding through multi-point flexible control, thereby solving the problem of automated edge bending of workpieces with variable cross-section.

[0021] (3) The bidirectional bending machine of the present invention can realize various complex plate bending by replacing the jaw plate, and improve the utilization rate of the equipment by making one machine multi-functional. Attached Figure Description

[0022] The accompanying drawings, which form part of this invention, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an undue limitation of the invention. In the drawings:

[0023] Figure 1 is a schematic isometric view of the bending unit according to an embodiment of the present invention;

[0024] Figure 2 is a side perspective view of the bending unit according to an embodiment of the present invention;

[0025] Figure 3 is a partial front view of the dual coaxial eccentric device according to an embodiment of the present invention;

[0026] Figure 4 is a side view of the jaw assembly and bending flap assembly according to an embodiment of the present invention.

[0027] Figure 5 is a side view schematic diagram of the sliding connecting rod (jaw assembly, bending flap side) according to an embodiment of the present invention;

[0028] Figure 6 is a schematic isometric view of the sliding connecting rod (cylinder side) according to an embodiment of the present invention;

[0029] Figure 7 is a schematic front view of the bidirectional bending machine according to an embodiment of the present invention;

[0030] Figure 8 is a schematic isometric view of the bidirectional bending machine according to an embodiment of the present invention;

[0031] Figure 9 is a schematic side view of the bidirectional bending machine according to an embodiment of the present invention;

[0032] Figure 10 is an isometric view of the sheet metal positioning and clamping device according to an embodiment of the present invention.

[0033] Figure 11 is a schematic front view of the independent drive group according to an embodiment of the present invention;

[0034] Figure 12 is a schematic front view of the active drive group according to an embodiment of the present invention;

[0035] Figure 13 is a schematic front view of the passive drive group according to an embodiment of the present invention;

[0036] Figure 14 is a schematic front view of the cutting device according to an embodiment of the present invention;

[0037] Figure 15 is a schematic diagram of the roller shear head (with folded pulleys) according to an embodiment of the present invention;

[0038] Figure 16 is a schematic diagram of the roller shear head (pulley unfolded state) according to an embodiment of the present invention.

[0039] Explanation of reference numerals in the attached figures:

[0040] 1-Clamping arm; 2-Lower clamp seat; 201-First synchronous shaft; 202-Torsion arm; 3-Clamping cylinder; 4-Jaw assembly; 401-Upper jaw plate; 402-Lower jaw plate; 5-Bending and flipping plate assembly; 501-Upper flipping plate; 502-Lower flipping plate; 503-Reinforcing plate; 504-Sliding connecting rod; 6-Double coaxial eccentric device; 601-Eccentric shaft; 602-Eccentric sleeve; 603-Torsion arm; 604-Adjusting oil 7-Cylinder; 7-Cut device; 701-Roller shear head; 702-Transition plate; 703-Hydraulic motor; 704-Bearing seat; 705-Drive chain; 706-Guide rail; 707-Guide roller; 8-Base frame; 9-Sheet material positioning and clamping device; 901-Second synchronous shaft; 902-Pulley group; 903-Drive machine; 904-Slide table; 905-Slide rail; 906-Tensioning sleeve; 10-Bending unit; 11-Sheet to be bent. Detailed Implementation

[0041] It should be noted that, unless otherwise specified, the embodiments and features described in the present invention can be combined with each other.

[0042] The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0043] A bending unit 10, as shown in Figure 1, comprises a clamping arm 1, a lower clamp seat 2, a clamping cylinder 3, a jaw assembly 4, and a bending flap assembly 5. The clamping arm 1 is hinged to the lower clamp seat 2 via a double coaxial eccentric device 6, which acts as a fulcrum. Both the clamping arm 1 and the lower clamp seat 2 are provided with hinge supports located at the bottom of the bending unit 10. The two ends of the clamping cylinder 3 are respectively hinged to the clamping arm 1 and the lower clamp seat 2. The lower clamp seat 2 is provided with a first synchronous shaft 201, which is hinged to a torsion arm 202. One end of the torsion arm 202 is also hinged to the hinge support of the clamping arm 1 via a connecting rod. As shown in Figure 2, the clamping cylinder 3 drives the clamping arm 1 to rotate and, in conjunction with the fulcrum, realizes the clamping and releasing movements of the clamping arm 1. Simultaneously, the driving force is synchronously transmitted to the first synchronous shaft 201 through the torsion arm 202. The jaw assembly 4 is fixedly connected to the clamping jaw arm 1 and the lower jaw seat 2. It moves with the clamping jaw arm 1 to clamp the plate 11 to be bent. The bending flip plate assembly 5 is connected to the clamping jaw arm 1 and the lower jaw seat 2 respectively through the sliding connecting rod 504 to realize the bending movement.

[0044] Specifically, as shown in Figure 3, the dual coaxial eccentric device 6 includes an eccentric shaft 601, an eccentric sleeve 602, a torque arm 603, and an adjusting cylinder 604. The dual coaxial eccentric device 6 is formed by coaxially connecting the eccentric sleeves 602 distributed on both sides of the eccentric shaft 601. The eccentric sleeves 602 are mounted on the eccentric shaft 601, specifically with their inner holes hinged to both ends of the eccentric shaft 601. The central axis of the eccentric shaft 601 is hinged to the two eccentric sleeves 602 on both sides. The outer ring of the eccentric sleeves 602 is covered with locking grooves, allowing them to be locked with locking pins after adjustment. The outer circles of the eccentric sleeves 602 are hinged to both sides of the lower clamp seat 2, and the inner hole of the clamping arm 1 is hinged to the eccentric shaft 601. One end of the eccentric shaft 601 is fixedly connected to the torque arm 603, and the other end of the torque arm 603 is hinged to the adjusting cylinder 604. At the same time, the adjusting cylinder 604 is also hinged to the lower clamp seat 2 to form a fixed support. The outer circle of the eccentric sleeve 602 is provided with an adjusting scale. The eccentric sleeve 602 can be rotated within a certain range by using a special tool. By adjusting the eccentric sleeve 602, a slight horizontal movement of the clamping arm 1 can be achieved. Similarly, the horizontal movement of the clamping arm 1 can be achieved by controlling the adjusting cylinder 604.

[0045] Furthermore, as shown in Figure 4, the jaw assembly 4 is divided into an upper jaw plate 401 and a lower jaw plate 402, and the bending flip plate assembly 5 is divided into an upper flip plate 501 and a lower flip plate 502. As shown in Figure 5, the upper jaw plate 401 is fixed to the clamping jaw arm 1, and the lower jaw plate 402 is fixed to the lower jaw seat 2. Replaceable jaw plates are installed at the ends of the upper jaw plate 401 and the lower jaw plate 402. The replaceable jaw plates directly contact and clamp the plate 11 to be bent. The replaceable jaw plates can be replaced according to the specific plate type, realizing multi-purpose use of one machine. The upper jaw plate 401 and the lower jaw plate 402 are arranged facing each other to form jaws. The upper jaw plate 401 swings with the clamping jaw arm 1 around the double coaxial eccentric device 6, so that the upper jaw plate 401 and the lower jaw plate 402 clamp the plate 11 to be bent. The upper flip plate 501 is connected to the clamping arm 1 via a sliding connecting rod 504, and the lower flip plate 502 is connected to the lower clamp seat 2 via a sliding connecting rod 504. The upper flip plate 501 and the lower flip plate 502 are arranged facing each other. The upper flip plate 501 and the lower flip plate 502 can rotate around the tips of the upper jaw plate 401 and the lower jaw plate 402 respectively via the sliding connecting rod 504 to realize the flip plate bending movement. The upper flip plate 501 and the lower flip plate 502 can move back and forth independently. The sliding connecting rod 504 is installed on the clamping arm 1 and the lower clamp seat 2 via a slide rail 905. As shown in Figure 6, the sliding connecting rod 504 is also connected to a hydraulic cylinder to realize the back and forth sliding of the sliding connecting rod 504. A reinforcing plate 503 is installed on the outer side of the upper flip plate 501 and the lower flip plate 502 for bending the thick plate to be bent 11. The bending action is as follows: the upper flip plate 501 retracts and the lower flip plate 502 extends to achieve the upward bending of the plate to be bent 11; the upper flip plate 501 extends and the lower flip plate 502 retracts to achieve the downward bending of the plate to be bent 11.

[0046] A bidirectional bending machine includes a bending unit 10 as described above, specifically including a cutting device 7, a base frame 8, and a sheet positioning and clamping device 9, as shown in Figures 7-9. Several bending units 10 are mounted parallel to each other on the base frame 8. Bending flip plates, a double coaxial eccentric device 6, and a first synchronous shaft 201 rigidly connect the bending units 10 together. The first synchronous shaft 201 connects multiple bending units 10, enabling their clamping arms 1 to move synchronously. The main shafts of the sliding connecting rods 504 of each bending unit 10 are also connected in series, achieving synchronous bending motion of the bending flip plate groups 5 of each bending unit 10. Furthermore, the main shafts of the adjusting cylinders 604 of each bending unit 10 are also connected in series, used to achieve horizontal alignment of the clamping arms 1 of each bending unit 10. Ultimately, the synchronous operation of each bending unit 10 improves the bending accuracy of the sheet 11 to be bent. Several sheet metal positioning and clamping devices 9 are located between each bending unit 10 and are used to clamp and transport the sheet metal to be bent 11 to the bending working area; the cutting device 7 is installed on the lower flip plate 502 via the slide rail 905 and is used to roll cut the sheet metal, including the bent sheet metal, and can also cut the sheet metal into strips separately.

[0047] Optionally, a stop (not shown in the attached drawing) is provided on one side of the upper jaw plate 401, and the sheet metal positioning and clamping device 9 is provided with a corresponding blocking unit. The stop and the blocking unit cooperate to limit the upper jaw plate 401. This includes a concave block installed on the lower side of the upper jaw plate 401 and a convex block installed on the sheet metal positioning and clamping device 9. When the sheet metal positioning and clamping device 9 slides down to the lower limit, the convex block inserts into the concave block to limit the slight deformation of the carriage during bending.

[0048] Furthermore, as shown in Figure 10, the sheet positioning and clamping device 9 can achieve synchronous action or bending of sheet metal with variable cross-section through multi-point flexible control. The sheet positioning and clamping device 9 includes a second synchronous shaft 901, a pulley group 902, a drive motor 903, a slide table 904, a slide rail 905, and a tensioning sleeve 906. The sheet metal to be bent 11 is placed on the slide table 904. The drive motor 903 is connected to the pulley group 902, and the pulley group 902 is connected to the slide table 904 through a belt. The slide table 904 is slidably connected to the slide rail 905, which is used to drive the slide table 904 to slide on the slide rail 905 to send the sheet metal to be bent 11 to the bending unit 10. The second synchronous shaft 901 is a single unit connected to multiple sheet positioning and clamping devices 9. The second synchronous shaft 901 is connected to the pulley group 902 through bearings. The tensioning sleeve 906 is fixedly connected to the second synchronous shaft 901 and the pulley group 902 respectively, and is used to drive the second synchronous shaft 901 and the pulley group 902 to rotate synchronously.

[0049] Specifically, as shown in Figures 11-13, the drive motor 903 drives the slide table 904 to move back and forth. The drive motor 903 achieves the individual movement of a single sheet metal positioning and clamping device 9 or the coordinated movement of multiple sheet metal positioning and clamping devices 9 through a mechanical structure. The clamping principle is as follows: the drive motor 903 drives the pulley group 902 to rotate, the pulley group 902 drives the second synchronous shaft 901 and the slide table 904, and drives the slide table 904 to clamp the material plate on the slide rail 905. Furthermore, the second synchronous shaft 901, pulley group 902, drive motor 903, slide table 904, and slide rail 905 form an independent drive group to drive the movement of a single sheet metal positioning and clamping device 9; the second synchronous shaft 901, pulley group 902, drive motor 903, slide table 904, slide rail 905, and tension sleeve 906 form an active drive group, which can adjust the power output point of the second synchronous shaft 901 by changing the installation position of the tension sleeve, so as to drive the movement of a single sheet metal positioning and clamping device 9 while making the second synchronous shaft 901 and pulley group 902 rotate synchronously; the second synchronous shaft 901, pulley group 902, slide table 904, and slide rail 905 form a passive drive group, whose driving principle is that the second synchronous shaft 901 rolls the active drive group and the passive drive group coaxially, and the second synchronous shaft 901 is used as the power input to passively perform synchronous clamping movement with the active drive group. The independent drive group can clamp and feed the board material independently, while the active drive group simultaneously drives the passive drive group to clamp and feed the board material.

[0050] Furthermore, as shown in Figure 14, the cutting device 7 includes a roller shear head 701, a transition plate 702, a hydraulic motor 703, a bearing seat 704, a transmission chain 705, and a guide rail 706. The guide rail 706 is a linear guide rail 706, which is laterally fixed on the base frame 8. The roller shear head 701 is connected to the lower flip plate 502, and the roller shear head 701 is also fixedly connected to the transition plate 702. The transition plate 702 is slidably connected to the guide rail 706. The hydraulic motor 703 and the bearing seat 704 are fixed on the base frame 8. The hydraulic motor 703 is connected to the transition plate 702 through the transmission chain 705, and is used to drive the transition plate 702 to slide on the slide rail 905. The bearing seat 704 is connected to the transmission chain 705 to realize the tensioning function of the transmission chain 705.

[0051] As shown in Figures 15-16, since the transmission chain 705 is arranged horizontally, a continuous arrangement of nylon support strips is provided below the transmission chain 705 for guiding and supporting the transmission chain 705. The cutting device 7 also includes a guide wheel 707, which is located on the back of the roller shear head 701. The guide wheel 707 is rotatably connected to the roller shear head 701. When the roller shear head 701 moves, the guide wheel 707 moves along the flip plate to support the bent sheet material, increase the rigidity of the device, and improve the accuracy of longitudinal cutting. The guide wheel 707 can be in two states: folded or unfolded, with different heights in different states. When unfolded, the guide wheel 707 is at the material support height; when folded, the height of the guide wheel 707 is reduced so as not to interfere with the sheet material. When it is necessary to cut wide sheet material, the guide wheel 707 is unfolded to support the flat sheet material; when cutting narrow sheet material, the guide wheel 707 can be folded to prevent the roller shear head 701 from interfering with other objects when moving.

[0052] The original drive devices mentioned above, such as clamp cylinder 3, adjusting cylinder 604, drive motor 903, hydraulic motor 703, and roller shear head 701, are all connected to the control console for unified scheduling and control, so as to realize the automatic bending operation of the bending machine.

[0053] Those skilled in the art will recognize that the units and method steps of the various examples described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, computer software, or a combination of both. To clearly illustrate the interchangeability of hardware and software, the components and steps of the various examples have been generally described in terms of functionality in the foregoing description. Whether these functions are implemented in hardware or software depends on the specific application and design constraints of the technical solution. Those skilled in the art can use different methods to implement the described functions for each specific application, but such implementations should not be considered beyond the scope of this invention.

[0054] In the several embodiments provided in this application, it should be understood that the disclosed methods and systems can be implemented in other ways. For example, the division of units described above is merely a logical functional division, and in actual implementation, there may be other division methods. For instance, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. The aforementioned units may or may not be physically separated. The components shown as units may or may not be physical units, that is, they may be located in one place or distributed across multiple network units. Some or all of the units can be selected to achieve the purpose of the embodiments of the present invention according to actual needs.

[0055] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention, and they should all be covered within the scope of the claims and specification of the present invention.

[0056] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A bidirectional bending machine, characterized in that: The system includes a bending unit, a cutting device, a base frame, and a sheet metal positioning and clamping device. The bending unit comprises a clamping arm, a lower clamp seat, a clamping cylinder, a jaw assembly, and a bending flap assembly. The clamping arm is hinged to the lower clamp seat and serves as a fulcrum. The two ends of the clamping cylinder are respectively hinged to the clamping arm and the lower clamp seat. The lower clamp seat has a first synchronous shaft, to which a torsion arm is hinged. The torsion arm is hinged to the clamping arm via a connecting rod, thus cooperating with the fulcrum to achieve the clamping and releasing movements of the clamping arm. The jaw assembly is fixedly connected to the clamping arm and the lower clamp seat, and the bending flap assembly... The clamping arm is connected to the lower clamp seat via sliding connecting rods to achieve bending motion. The clamping arm is hinged to the lower clamp seat via a double coaxial eccentric device, which includes an eccentric shaft, an eccentric sleeve, a torque arm, and an adjusting cylinder. The eccentric sleeve is mounted on the eccentric shaft, and its outer circle is hinged to both sides of the lower clamp seat. The clamping arm is hinged to the eccentric shaft, and the eccentric shaft is fixedly connected to one end of the torque arm. The other end of the torque arm is hinged to the adjusting cylinder, which is hinged to the lower clamp seat. The clamping arm is horizontally adjusted by adjusting the eccentric sleeve. The slight directional movement is achieved by controlling and adjusting the hydraulic cylinder to move the clamping arm horizontally; the sliding connecting rod is mounted on the clamping arm and the lower clamp seat via a slide rail, and is also connected to the hydraulic cylinder to achieve forward and backward sliding of the sliding connecting rod; the bending flip plate assembly includes an upper flip plate and a lower flip plate, the upper flip plate is connected to the clamping arm via a sliding connecting rod, and the lower flip plate is connected to the lower clamp seat via a sliding connecting rod, the upper and lower flip plates are arranged facing each other, and the bending movement of the flip plates is achieved by the sliding connecting rod; several bending units are arranged in parallel. Mounted on the base frame, the bending flip plate assembly, the double coaxial eccentric device, and the first synchronous shaft rigidly connect the bending unit into one unit; several sheet positioning and clamping devices are located between each bending unit to clamp and transport the sheet to be bent to the bending working area; the cutting device includes a roller shear head, a transition plate, a hydraulic motor, a bearing seat, a transmission chain, and a guide rail. The guide rail is horizontally fixed on the base frame, the roller shear head is connected to the lower flip plate, and the roller shear head is also fixedly connected to the transition plate. The transition plate is slidably connected to the guide rail, and the hydraulic motor and bearing seat are fixed on the base frame.

2. The bidirectional bending machine according to claim 1, characterized in that: The jaw assembly includes an upper jaw plate and a lower jaw plate. The upper jaw plate is fixed to the clamping jaw arm, and the lower jaw plate is fixed to the lower jaw base. The upper jaw plate and the lower jaw plate are arranged facing each other to form jaws. The upper jaw plate swings with the clamping jaw arm to clamp the plate to be bent.

3. A bidirectional bending machine according to claim 1, characterized in that: Reinforcing plates are installed on the outer sides of the upper and lower flaps; the upper flap retracts and the lower flap extends to bend the plate to be bent upwards; the upper flap extends and the lower flap retracts to bend the plate to be bent downwards.

4. A bidirectional bending machine according to claim 1, characterized in that: The cutting device is mounted on the lower flip plate via a slide rail and is used for roll shearing of sheet metal.

5. A bidirectional bending machine according to claim 2, characterized in that: A stop is provided on one side of the upper jaw plate, and the plate positioning and clamping device is provided with a corresponding blocking unit. The stop and the blocking unit cooperate to limit the upper jaw plate. The plate positioning and clamping device includes a second synchronous shaft, a pulley group, a drive motor, a slide table, a slide rail, and a tensioning sleeve. The plate to be bent is placed on the slide table. The drive motor is connected to the pulley group, the pulley group is connected to the slide table through a belt, and the slide table is slidably connected to the slide rail to drive the slide table to slide on the slide rail. The second synchronous shaft is connected to the pulley assembly via bearings, and the tensioning sleeve is fixedly connected to both the second synchronous shaft and the pulley assembly to drive the second synchronous shaft and the pulley assembly to rotate synchronously.

6. A bidirectional bending machine according to claim 5, characterized in that: The second synchronous shaft, pulley group, drive motor, slide table, and slide rail form an independent drive group for driving the movement of a single sheet positioning and clamping device; the second synchronous shaft, pulley group, drive motor, slide table, slide rail, and tensioning sleeve form an active drive group for driving the second synchronous shaft and pulley group to rotate synchronously; the second synchronous shaft, pulley group, slide table, and slide rail form a passive drive group for passively synchronizing and clamping movements with the active drive group.

7. A bidirectional bending machine according to claim 4, characterized in that: The hydraulic motor is connected to the transition plate via a transmission chain to drive the transition plate to slide on the slide rail; the bearing housing is connected to the transmission chain to achieve the tensioning of the transmission chain.

8. A bidirectional bending machine according to claim 7, characterized in that: The cutting device also includes a guide wheel, which is located on the back of the roller shear head and is rotatably connected to the roller shear head to support the bent sheet material.

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