CN221047004U - Bending unit and bidirectional bending machine - Google Patents

Abstract

The invention provides a bending unit and a bidirectional bending machine, which comprise clamping clamp arms, a lower clamp seat, a clamp cylinder, a jaw set and a bending turning plate set; the clamping jaw arm is hinged with the lower jaw seat and used as a fulcrum, two ends of the clamping cylinder are respectively hinged with the clamping jaw arm and the lower jaw seat, the lower jaw seat is provided with a first synchronous shaft, the first synchronous shaft is hinged with a torsion arm, the torsion arm is hinged with the clamping jaw arm through a connecting rod, and the clamping and loosening movement of the clamping jaw arm is realized by matching with the fulcrum; the jaw set is fixedly connected with the clamping jaw arm and the lower jaw seat, and the bending turning plate set is respectively connected with the clamping jaw arm and the lower jaw seat through the sliding connecting rod to realize bending movement. The invention has the beneficial effects that: the working efficiency and the consistency of products are improved, and the labor cost is reduced.

Description

Bending unit and bidirectional bending machine

Technical Field

The invention belongs to the field of sheet metal machining equipment, and particularly relates to a bending unit and a bidirectional bending machine.

Background

Most of bending machines in the current market are of single-station type, only can complete simple secondary bending, still need manual operation for bending of complex multi-bending or long-strip shape, and have low efficiency. For some special shapes, complex bending dies need to be manually customized. The design and the manufacturing period of the die are long, which is not beneficial to the production requirements of multiple varieties in small batches. The existing single-station bending machine can only complete simple secondary bending, most of bending machines are mechanically driven, are limited by fatigue performance and rigidity of a driving piece, are heavy in action, are difficult to realize high-speed and high-frequency bending operation, and not only are construction and use costs improved, but also production efficiency is affected.

Disclosure of Invention

In view of the above, the present invention aims to provide a bending unit and a bidirectional bending machine, so as to improve working efficiency and product consistency, and reduce labor cost.

In order to achieve the above purpose, the technical scheme of the invention is realized as follows:

A bending unit comprises a clamping clamp arm, a lower clamp seat, a clamp cylinder, a jaw set and a bending turning plate set; the clamping jaw arm is hinged with the lower jaw seat and used as a fulcrum, two ends of the clamping cylinder are respectively hinged with the clamping jaw arm and the lower jaw seat, the lower jaw seat is provided with a first synchronous shaft, the first synchronous shaft is hinged with a torsion arm, the torsion arm is hinged with the clamping jaw arm through a connecting rod, and the clamping and loosening movement of the clamping jaw arm is realized by matching with the fulcrum; the jaw set is fixedly connected with the clamping jaw arm and the lower jaw seat, and the bending turning plate set is respectively connected with the clamping jaw arm and the lower jaw seat through the sliding connecting rod to realize bending movement.

Further, the clamping clamp arm is hinged with the lower clamp seat through a double-coaxial eccentric device, the double-coaxial eccentric device comprises an eccentric shaft, an eccentric sleeve, a torque arm and an adjusting oil cylinder, the eccentric sleeve is arranged on the eccentric shaft, the outer circle of the eccentric sleeve is respectively hinged with two sides of the lower clamp seat, the clamping clamp arm is hinged with the eccentric shaft, the eccentric shaft is fixedly connected with one end of the torque arm, the other end of the torque arm is hinged with the adjusting oil cylinder, the adjusting oil cylinder is hinged with the lower clamp seat, the micro-movement of the clamping clamp arm in the horizontal direction is realized through adjusting the eccentric sleeve, and the movement of the clamping clamp arm in the horizontal direction is realized through controlling the adjusting oil cylinder.

Further, the jaw set comprises an upper jaw plate and a lower jaw plate, the upper jaw plate is fixed on the clamping jaw arm, the lower jaw plate is fixed on the lower jaw seat, the upper jaw plate and the lower jaw plate are oppositely arranged to form jaws, and the upper jaw plate swings along with the clamping jaw arm to realize that the jaw set clamps the plates to be bent.

Furthermore, the sliding type connecting rod is arranged on the clamping jaw arm and the lower jaw seat through the sliding rail, and is also connected with the oil cylinder to realize the front-back sliding of the sliding type connecting rod; the bending turnover plate group comprises an upper turnover plate and a lower turnover plate, the upper turnover plate is connected with the clamping clamp arm through a sliding type connecting rod, the lower turnover plate is connected with the lower clamp seat through a sliding type connecting rod, the upper turnover plate and the lower turnover plate are oppositely arranged, and the bending movement of the turnover plate is realized through the sliding type connecting rod.

Furthermore, the outer sides of the upper turning plate and the lower turning plate are provided with reinforcing plates for bending the thick plate to be bent; the upper turning plate is retracted, the lower turning plate extends out, and upward bending of the plate to be bent is realized; the upper turning plate stretches out, the lower turning plate is retracted, and downward bending of the plate to be bent is achieved.

Further, a bidirectional bending machine comprises a bending unit, wherein the bending unit comprises a cutter device, a bottom frame and a plate positioning clamping and conveying device;

The bending units are arranged on the underframe in parallel, and the bending turning plate, the double-coaxial eccentric device and the first synchronous shaft rigidly connect the bending units into a whole;

the plate positioning clamping and conveying devices are positioned between the bending units and are used for clamping and conveying the plates to be bent to the bending working area;

The cutter device is arranged on the lower turning plate through a sliding rail and is used for cutting the plate material by the roller.

Further, a stop block is arranged on one side of the upper jaw plate, the plate positioning clamping and conveying device is provided with a corresponding blocking unit, and the stop block is matched with the blocking unit to limit the upper jaw plate; the plate positioning clamping and conveying device comprises a second synchronous shaft, a belt pulley group, a driving machine, a sliding table, a sliding rail and a tensioning sleeve, wherein the plate to be bent is arranged on the sliding table, the driving machine is connected with the belt pulley group, the belt pulley group is connected with the sliding table through a belt, and the sliding table is in sliding connection with the sliding rail and is used for driving the sliding table to slide on the sliding rail; the second synchronizing shaft is connected with the pulley group through a bearing, and the tensioning sleeve is fixedly connected with the second synchronizing shaft and the pulley group respectively and used for driving the second synchronizing shaft to synchronously rotate with the pulley group.

Further, the second synchronous shaft, the belt wheel group, the driving machine, the sliding table and the sliding rail form an independent driving group for driving the single plate positioning clamping device to move; the second synchronous shaft, the belt pulley group, the driving machine, the sliding table, the sliding rail and the tensioning sleeve form an active driving group for driving the second synchronous shaft and the belt pulley group to synchronously rotate; the second synchronizing shaft, the belt pulley group, the sliding table and the sliding rail form a passive driving group for the clamping and conveying movement of the passive synchronizing and active driving group.

Further, the cutter device comprises a roller shear head, a transition plate, a hydraulic motor, a bearing seat, a transmission chain and a guide rail, wherein the guide rail is transversely fixed on the underframe, the roller shear head is connected with the lower turning plate, the roller shear head is also fixedly connected with the transition plate, the transition plate is in sliding connection with the guide rail, and the hydraulic motor and the bearing seat are fixed on the underframe; the hydraulic motor is connected with the transition plate through a transmission chain and is used for driving the transition plate to slide on the sliding rail; the bearing pedestal is connected with the transmission chain to realize the tensioning of the transmission chain.

Further, the cutter device further comprises a leaning wheel, wherein the leaning wheel is positioned on the back of the roller shear head, and the leaning wheel is rotationally connected with the roller shear head and used for bearing the bent plate.

Compared with the prior art, the bidirectional bending machine has the following beneficial effects:

(1) According to the bidirectional bending machine, the action synchronicity of each bending unit is guaranteed by adopting the multi-middle synchronizing shaft device, synchronous movement is realized from a mechanical angle, the reliability of equipment is improved, and meanwhile, the manufacturing cost of the equipment is reduced;

(2) According to the bidirectional bending machine, the plate positioning clamping and conveying device realizes plate clamping and conveying or inclined plane type feeding through multi-point flexible control, and the automatic flanging function of a variable-section workpiece is achieved;

(3) According to the bidirectional bending machine, through the replaceable jaw plate, multiple complex plate bending can be realized on the machine, and the utilization rate of the machine is improved.

Drawings

The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention. In the drawings:

Fig. 1 is an isometric view of a bending unit according to an embodiment of the present invention;

FIG. 2 is a schematic side perspective view of a bending unit according to an embodiment of the present invention;

FIG. 3 is a schematic partial front view of a dual coaxial eccentric in accordance with an embodiment of the present invention;

Fig. 4 is a schematic side view of a jaw set and a bending flap set according to an embodiment of the present invention;

Fig. 5 is a schematic side view of a sliding link (jaw set, bent flap side) according to an embodiment of the present invention;

Fig. 6 is a schematic diagram of an isometric view of a sliding connecting rod (cylinder side) according to an embodiment of the present invention;

fig. 7 is a schematic front view of a bi-directional bending machine according to an embodiment of the present invention;

fig. 8 is an isometric view of a bi-directional bending machine according to an embodiment of the present invention;

Fig. 9 is a schematic side view of a bi-directional bending machine according to an embodiment of the present invention;

FIG. 10 is an isometric view of a sheet positioning and clamping device according to an embodiment of the present invention;

FIG. 11 is a schematic front view of an independent drive unit according to an embodiment of the present invention;

FIG. 12 is a schematic front view of an active drive set according to an embodiment of the present invention;

FIG. 13 is a schematic front view of a passive drive unit according to an embodiment of the present invention;

figure 14 is a schematic front view of a cutter assembly according to an embodiment of the present invention;

fig. 15 is a schematic view of a roller shear (folded state of the belt wheel) according to an embodiment of the present invention;

fig. 16 is a schematic view of a roller shear head (pulley-deployed state) according to an embodiment of the present invention.

Reference numerals illustrate:

1-clamping a clamp arm; 2-lower clamp seat; 201-a first synchronization axis; 202-torsion arms; 3-clamping oil cylinders; 4-jaw set; 401-upper jaw plate; 402-a lower jaw plate; 5-bending the panel turnover group; 501-turning up the plate; 502-lower turning plate; 503-reinforcing plate; 504-sliding links; 6-a double coaxial eccentric; 601-an eccentric shaft; 602-eccentric sleeve; 603-torque arm; 604-adjusting an oil cylinder; 7-a cutter device; 701-roller shear head; 702-a transition plate; 703-a hydraulic motor; 704-bearing blocks; 705-drive chain; 706—a rail; 707-leaning wheel; 8-a chassis; 9-a plate positioning clamping device; 901-a second synchronization shaft; 902-a belt pulley group; 903—drive; 904-a slipway; 905-slide rail; 906—tensioning sleeve; 10-bending units; 11-a plate to be bent.

Detailed Description

It should be noted that, without conflict, the embodiments of the present invention and features of the embodiments may be combined with each other.

The invention will be described in detail below with reference to the drawings in connection with embodiments.

As shown in fig. 1, a bending unit 10 comprises a main body including a clamping arm 1, a lower jaw seat 2, a clamping cylinder 3, a jaw set 4 and a bending turning plate set 5. The clamping clamp arm 1 is hinged with the lower clamp seat 2 through a double-coaxial eccentric device 6, and the double-coaxial eccentric device 6 serves as a fulcrum; the clamping jaw arm 1 and the lower jaw seat 2 are respectively provided with a hinged support, the hinged supports are positioned at the bottom of the bending unit 10, two ends of the clamping cylinder 3 are respectively hinged to the clamping jaw arm 1 and the lower jaw seat 2, the lower jaw seat 2 is provided with a first synchronous shaft 201, the first synchronous shaft 201 is hinged with a torsion arm 202, and one end of the torsion arm 202 is also hinged with the hinged supports of the clamping jaw arm 1 through a connecting rod; as shown in fig. 2, the clamp cylinder 3 drives the clamp arm 1 to rotate, and cooperates with the fulcrum to realize the clamping and unclamping movements of the clamp arm 1, while synchronously transmitting the driving force to the first synchronization shaft 201 through the torsion arm 202. The jaw set 4 is fixedly connected with the clamping jaw arm 1 and the lower jaw seat 2, moves along with the clamping jaw arm 1 to clamp the plate 11 to be bent, and the bending turning plate set 5 is respectively connected with the clamping jaw arm 1 and the lower jaw seat 2 through the sliding connecting rod 504 so as to realize bending movement.

Specifically, as shown in fig. 3, the double-coaxial eccentric device 6 includes an eccentric shaft 601, an eccentric sleeve 602, a torque arm 603, and an adjusting cylinder 604, and the double-coaxial eccentric device 6 is formed by coaxially and serially connecting the eccentric sleeves 602 distributed on both sides of the eccentric shaft 601. The eccentric sleeve 602 is arranged on the eccentric shaft 601, specifically, an inner hole of the eccentric sleeve 602 is hinged with two ends of the eccentric shaft 601, a central shaft of the eccentric shaft 601 is hinged with the eccentric sleeves 602 at two sides, locking grooves are distributed on the outer ring of the eccentric sleeve 602, and the eccentric sleeve 602 can be locked by locking pins after adjustment. The outer circle of the eccentric sleeve 602 is hinged with the two sides of the lower clamp seat 2 respectively, and the inner hole of the clamping clamp arm 1 is hinged with the eccentric shaft 601. The eccentric shaft 601 is fixedly connected with one end of the torque arm 603, the other end of the torque arm 603 is hinged with the adjusting oil cylinder 604, and meanwhile, the adjusting oil cylinder 604 is hinged with the lower clamp seat 2 to form a fixed support. The outer circle of the eccentric sleeve 602 is provided with an adjusting poking rule, the eccentric sleeve 602 can be rotated in a certain range by a special tool, and the micro-movement of the clamping forceps arm 1 in the horizontal direction is realized by adjusting the eccentric sleeve 602; similarly, the adjustment cylinder 604 is controlled to move the clamp arm 1 in the horizontal direction.

Further, as shown in fig. 4, the jaw set 4 is divided into an upper jaw plate 401 and a lower jaw plate 402, and the bending flap set 5 is divided into an upper flap 501 and a lower flap 502. As shown in fig. 5, an upper jaw plate 401 is fixed on a clamping jaw arm 1, a lower jaw plate 402 is fixed on a lower jaw seat 2, replaceable jaw plates are mounted at the tail ends of the upper jaw plate 401 and the lower jaw plate 402, the replaceable jaw plates are directly contacted with a plate 11 to be bent for clamping, and the replaceable jaw plates can be replaced according to specific plate types, so that one machine is multipurpose. The upper jaw plate 401 and the lower jaw plate 402 are oppositely arranged to form a jaw, the upper jaw plate 401 swings around the double-coaxial eccentric device 6 along with the clamping arm 1, and the upper jaw plate 401 and the lower jaw plate 402 clamp the plate 11 to be bent. The upper turning plate 501 is connected with the clamping jaw arm 1 through a sliding connecting rod 504, the lower turning plate 502 is connected with the lower jaw seat 2 through the sliding connecting rod 504, the upper turning plate 501 and the lower turning plate 502 are arranged in opposite directions, and the upper turning plate 501 and the lower turning plate 502 can respectively turn around the tips of the upper jaw plate 401 and the lower jaw plate 402 through the sliding connecting rod 504 to realize turning plate bending movement. The upper turning plate 501 and the lower turning plate 502 can independently perform telescopic movement, and the sliding connecting rod 504 is installed on the clamping jaw arm 1 and the lower jaw seat 2 through a sliding rail 905, and the sliding connecting rod 504 is also connected with an oil cylinder as shown in fig. 6, so that the sliding connecting rod 504 slides back and forth. The outer sides of the upper turning plate 501 and the lower turning plate 502 are provided with reinforcing plates 503 which are used for bending the thick plate 11 to be bent, and the bending actions are as follows: the upper turning plate 501 is retracted, and the lower turning plate 502 extends out, so that the upward bending of the plate 11 to be bent is realized; the upper turning plate 501 extends out, and the lower turning plate 502 retracts, so that the plate 11 to be bent is bent downwards.

A bidirectional bending machine comprises the bending unit 10, and particularly comprises a cutter device 7, a bottom frame 8 and a plate positioning clamping and conveying device 9 as shown in figures 7-9. The bending units 10 are arranged on the underframe 8 in parallel, and the bending turnover plate, the double-coaxial eccentric device 6 and the first synchronous shaft 201 rigidly connect the bending units 10 into a whole. The first synchronous shaft 201 is used for connecting the plurality of bending units 10 to enable the clamping clamp arms 1 to synchronously operate; the main shafts of the sliding connecting rods 504 of the bending units 10 are also connected in series into a whole, so that the synchronous bending movement of the bending turnover plate groups 5 of the bending units 10 is realized; the main shafts of the adjusting cylinders 604 of the bending units 10 are also connected in series into a whole, so that the alignment of the bending units 10 in the horizontal direction of the clamping arm 1 is realized; finally, synchronous operation of each bending unit 10 is realized, and bending accuracy of the plate 11 to be bent is improved. The plate positioning clamping and conveying devices 9 are positioned among the bending units 10 and are used for clamping and conveying the plates 11 to be bent to a bending working area; the cutter device 7 is mounted on the lower turning plate 502 through a sliding rail 905 and is used for roller shearing of the plate material, wherein the plate material comprises the bent plate material, and the plate material can be cut and striped independently.

Optionally, a stop (not shown in the drawing) is disposed on one side of the upper jaw plate 401, and the sheet positioning and clamping device 9 is provided with a corresponding blocking unit, where the stop cooperates with the blocking unit to limit the upper jaw plate 401. The device comprises a concave block arranged on the lower side of an upper jaw plate 401, a convex block arranged on a plate positioning clamping device 9, and a convex block inserted into the concave block when the plate positioning clamping device 9 slides down to be limited down, so that the micro deformation of a sliding frame in the bending process is limited.

Further, as shown in fig. 10, the plate positioning clamping device 9 can realize synchronous action or variable cross-section plate flanging through multi-point flexible control. The plate positioning clamping and conveying device 9 comprises a second synchronizing shaft 901, a pulley group 902, a driving machine 903, a sliding table 904, a sliding rail 905 and a tensioning sleeve 906, wherein a plate 11 to be bent is arranged on the sliding table 904, the driving machine 903 is connected with the pulley group 902, the pulley group 902 is connected with the sliding table 904 through a belt, the sliding table 904 is slidably connected with the sliding rail 905 and used for driving the sliding table 904 to slide on the sliding rail 905 so as to convey the plate 11 to be bent to the bending unit 10. The second synchronizing shaft 901 is a single body and is connected with a plurality of plate positioning clamping and conveying devices 9, the second synchronizing shaft 901 is connected with the pulley group 902 through a bearing, and the tensioning sleeve 906 is fixedly connected with the second synchronizing shaft 901 and the pulley group 902 respectively and is used for driving the second synchronizing shaft 901 and the pulley group 902 to synchronously rotate.

Specifically, as shown in fig. 11-13, the driving machine 903 drives the sliding table 904 to move back and forth, and the driving machine 903 realizes the single movement of the single sheet positioning clamping device 9 or the linkage movement of a plurality of sheet positioning clamping devices 9 through a mechanical structure mode. The clamping and conveying principle is as follows: the driving machine 903 drives the belt pulley group 902 to rotate, the belt pulley group 902 drives the second synchronizing shaft 901 and the sliding table 904, and the sliding table 904 is driven to clamp the feeding plate on the sliding rail 905. The second synchronous shaft 901, the belt pulley group 902, the driving machine 903, the sliding table 904 and the sliding rail 905 form an independent driving group for driving the single plate positioning clamping and conveying device 9 to move; the second synchronizing shaft 901, the belt pulley group 902, the driving machine 903, the sliding table 904, the sliding rail 905 and the tensioning sleeve 906 form a driving group, the power output point of the second synchronizing shaft 901 can be adjusted by changing the installation position of the tensioning sleeve, and the driving device is used for driving a single plate positioning clamping and conveying device 9 to move and synchronously rotating the second synchronizing shaft 901 and the belt pulley group 902; the second synchronizing shaft 901, the belt pulley group 902, the sliding table 904 and the sliding rail 905 form a passive driving group, and the driving principle is that the second synchronizing shaft 901 coaxially rolls the active driving group and the passive driving group, and the second synchronizing shaft 901 is used as power input to passively clamp and send motion synchronously with the active driving group. The independent driving group can independently clamp and send the plate, and the active driving group synchronously drives the passive driving group to clamp and send the plate while clamping and send the plate.

Further, as shown in fig. 14, the cutter device 7 includes a roller shear 701, a transition plate 702, a hydraulic motor 703, a bearing block 704, a transmission chain 705, and a guide rail 706, the guide rail 706 is a linear guide rail 706, the guide rail 706 is transversely fixed on the chassis 8, the roller shear 701 is connected with the lower turning plate 502, the roller shear 701 is also fixedly connected with the transition plate 702, the transition plate 702 is slidably connected with the guide rail 706, and the hydraulic motor 703 and the bearing block 704 are fixed on the chassis 8. The hydraulic motor 703 is connected with the transition plate 702 through a transmission chain 705 and is used for driving the transition plate 702 to slide on a sliding rail 905; bearing block 704 is connected with drive chain 705 to realize the tensioning function of drive chain 705.

15-16, Since the drive chain 705 is horizontally disposed, a continuous nylon carrier strip is disposed below the drive chain 705 for guiding and supporting the drive chain 705. The cutter device 7 further comprises a leaning wheel 707, the leaning wheel 707 is rotatably connected with the roller shear 701 and positioned on the back of the roller shear 701, and the leaning wheel 707 moves along the turning plate along with the roller shear 701 when the roller shear 701 moves and is used for bearing bent plates, so that the rigidity of the device is improved, and the accuracy of longitudinal cutting straight lines is improved. The back wheel 707 may be in two positions, folded or unfolded, with the different positions being at different heights. The leaning wheel 707 is positioned at the material supporting height when unfolded, and the height of the leaning wheel 707 is reduced after folding so as not to interfere with the plate material. The leaning wheel 707 is unfolded when the wide plate needs to be cut so as to support the flat plate; the leaning wheel 707 can be folded when cutting the narrow plate material, so as to prevent the roller shear head 701 from interfering with other objects when moving.

The original driving devices such as the clamp cylinder 3, the adjusting cylinder 604, the driving machine 903, the hydraulic motor 703, the roller shear 701 and the like are connected with a control console for uniform dispatching control, so that the bending machine automatically performs bending work.

Those of ordinary skill in the art will appreciate that the elements and method steps of each example described in connection with the embodiments disclosed herein may be implemented as electronic hardware, computer software, or combinations of both, and that the elements and steps of each example have been described generally in terms of functionality in the foregoing description to clearly illustrate this interchangeability of hardware and software. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the solution. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present invention.

In the several embodiments provided in the present application, it should be understood that the disclosed methods and systems may be implemented in other ways. For example, the above-described division of units is merely a logical function division, and there may be another division manner when actually implemented, for example, a plurality of units or components may be combined or may be integrated into another system, or some features may be omitted or not performed. The units may or may not be physically separate, and components shown as units may or may not be physical units, may be located in one place, or may be distributed over a plurality of network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the embodiment of the present application.

Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present invention, and not for limiting the same; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some or all of the technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the invention, and are intended to be included within the scope of the appended claims and description.

The foregoing description of the preferred embodiments of the invention is not intended to be limiting, but rather is intended to cover all modifications, equivalents, alternatives, and improvements that fall within the spirit and scope of the invention.

Claims (10)

1. A bending unit, characterized in that: comprises a clamping clamp arm, a lower clamp seat, a clamp cylinder, a jaw set and a bending turnover plate set;

The clamping jaw arm is hinged with the lower jaw seat and used as a fulcrum, two ends of the clamping cylinder are respectively hinged with the clamping jaw arm and the lower jaw seat, the lower jaw seat is provided with a first synchronous shaft, the first synchronous shaft is hinged with a torsion arm, the torsion arm is hinged with the clamping jaw arm through a connecting rod, and the clamping and loosening movement of the clamping jaw arm is realized by matching with the fulcrum;

The jaw set is fixedly connected with the clamping jaw arm and the lower jaw seat, and the bending turning plate set is respectively connected with the clamping jaw arm and the lower jaw seat through the sliding connecting rod to realize bending movement.

2. A bending unit according to claim 1, wherein: the clamping clamp arm is hinged with the lower clamp seat through a double-coaxial eccentric device, the double-coaxial eccentric device comprises an eccentric shaft, an eccentric sleeve, a torque arm and an adjusting oil cylinder, the eccentric sleeve is arranged on the eccentric shaft, the outer circle of the eccentric sleeve is respectively hinged with two sides of the lower clamp seat, the clamping clamp arm is hinged with the eccentric shaft, the eccentric shaft is fixedly connected with one end of the torque arm, the other end of the torque arm is hinged with the adjusting oil cylinder, the adjusting oil cylinder is hinged with the lower clamp seat, the micro-movement of the clamping clamp arm in the horizontal direction is realized through adjusting the eccentric sleeve, and the movement of the clamping clamp arm in the horizontal direction is realized through controlling the adjusting oil cylinder.

3. A bending unit according to claim 1, wherein: the jaw set comprises an upper jaw plate and a lower jaw plate, the upper jaw plate is fixed on the clamping jaw arm, the lower jaw plate is fixed on the lower jaw seat, the upper jaw plate and the lower jaw plate are oppositely arranged to form a jaw, and the upper jaw plate swings along with the clamping jaw arm to realize that the jaw set clamps the plate to be bent.

4. A bending unit according to claim 1, wherein: the sliding type connecting rod is arranged on the clamping forceps arm and the lower forceps seat through the sliding rail, and is also connected with the oil cylinder to realize the front-back sliding of the sliding type connecting rod;

The bending turnover plate group comprises an upper turnover plate and a lower turnover plate, the upper turnover plate is connected with the clamping clamp arm through a sliding type connecting rod, the lower turnover plate is connected with the lower clamp seat through a sliding type connecting rod, the upper turnover plate and the lower turnover plate are oppositely arranged, and the bending movement of the turnover plate is realized through the sliding type connecting rod.

5. The bending unit of claim 4, wherein: the outer sides of the upper turning plate and the lower turning plate are provided with reinforcing plates for bending the thick plate to be bent;

The upper turning plate is retracted, the lower turning plate extends out, and upward bending of the plate to be bent is realized;

The upper turning plate stretches out, the lower turning plate is retracted, and downward bending of the plate to be bent is achieved.

6. A bi-directional bending machine comprising a bending unit according to any one of claims 1 to 5, characterized in that: comprises a cutter device, a bottom frame and a plate positioning clamping and conveying device;

The bending units are arranged on the underframe in parallel, and the bending turning plate, the double-coaxial eccentric device and the first synchronous shaft rigidly connect the bending units into a whole;

the plate positioning clamping and conveying devices are positioned between the bending units and are used for clamping and conveying the plates to be bent to the bending working area;

The cutter device is arranged on the lower turning plate through a sliding rail and is used for cutting the plate material by the roller.

7. A bi-directional bending machine according to claim 6, wherein: one side of the upper jaw plate is provided with a stop block, the plate positioning clamping device is provided with a corresponding blocking unit, and the stop block is matched with the blocking unit to limit the upper jaw plate;

the plate positioning clamping and conveying device comprises a second synchronous shaft, a belt pulley group, a driving machine, a sliding table, a sliding rail and a tensioning sleeve, wherein the plate to be bent is arranged on the sliding table, the driving machine is connected with the belt pulley group, the belt pulley group is connected with the sliding table through a belt, and the sliding table is in sliding connection with the sliding rail and is used for driving the sliding table to slide on the sliding rail;

The second synchronizing shaft is connected with the pulley group through a bearing, and the tensioning sleeve is fixedly connected with the second synchronizing shaft and the pulley group respectively and used for driving the second synchronizing shaft to synchronously rotate with the pulley group.

8. A bi-directional bending machine according to claim 7, wherein: the second synchronous shaft, the belt wheel group, the driving machine, the sliding table and the sliding rail form an independent driving group for driving the single plate positioning clamping device to move;

The second synchronous shaft, the belt pulley group, the driving machine, the sliding table, the sliding rail and the tensioning sleeve form an active driving group for driving the second synchronous shaft and the belt pulley group to synchronously rotate;

The second synchronizing shaft, the belt pulley group, the sliding table and the sliding rail form a passive driving group for the clamping and conveying movement of the passive synchronizing and active driving group.

9. A bi-directional bending machine according to claim 6, wherein: the cutter device comprises a roller shear head, a transition plate, a hydraulic motor, a bearing seat, a transmission chain and a guide rail, wherein the guide rail is transversely fixed on the underframe;

The hydraulic motor is connected with the transition plate through a transmission chain and is used for driving the transition plate to slide on the sliding rail;

The bearing pedestal is connected with the transmission chain to realize the tensioning of the transmission chain.

10. A two-way bending machine according to claim 9, wherein: the cutter device further comprises a leaning wheel, wherein the leaning wheel is positioned on the back of the roller shear head, and the leaning wheel is rotationally connected with the roller shear head and used for bearing bent plates.