Bending machine

Abstract

Disclosed in the present invention is a bending machine, comprising a machine body, a pressing mechanism, a bending mechanism, an eccentric mechanism, a balancing mechanism and a control mechanism. The machine body is provided with a workbench; the bending mechanism comprises a turnover plate, a bending die and a first driving device; the eccentric mechanism is arranged at two ends of the turnover plate, the bending die deflects towards the outer side of the workbench under the control of the eccentric mechanism, and the first driving device is in driving connection with the eccentric mechanism by means of a first rotating shaft so as to control the eccentric mechanism and the turnover plate to rotate together, thereby driving the bending die to perform a bending operation on a workpiece; and the balancing mechanism is arranged inside the turnover plate. In this way, the eccentric mechanism is utilized to control the bending die to deflect towards the outer side of the workbench, so as to meet the bending requirements of plates with different thicknesses, and in cooperation with the balancing mechanism, the bending die is enabled to maintain the balance of a workpiece during the bending process of the workpiece, such that the bending quality is stable and consistent, such that the rework rate of the workpiece is reduced so as to meet the use requirements of users, thus making same have a wide application range.

Description

A bending machine Technical Field

[0001] This invention relates to the field of workpiece bending technology, and in particular to a bending machine. Background Technology

[0002] Currently, with economic development and the continuous improvement of living standards, the application of sheet metal is becoming increasingly widespread. Sheet metal products are widely used in people's lives, from automotive parts to computer cases, and from network communications to home appliances. Sheet metal structures are diverse. Moreover, sheet metal processing requires multiple bending and shaping of sheet metal according to product needs, making dimensional control difficult and the process complex. At the same time, sheet metal processing usually uses bending machines for bending operations. A bending machine is a machine that can bend sheet metal. Traditional bending machines are manual, with complex machine structures, heavy operation, low production efficiency, long processing time, and high costs, which cannot meet the needs of users.

[0003] Later, an automatic bending machine appeared on the market. It typically includes a positioning table, a pressing device, and a bending device. The sheet metal is placed on the positioning table, pressed and fixed by the pressing device, and then bent by the bending device, thus achieving automated processing of the sheet metal. However, the existing bending machine has a complex structural design. Because the bending position is different for sheets of different thicknesses, users need to adjust the position of the bending device according to the bending requirements of different thicknesses each time they bend a sheet of different thicknesses. This can easily lead to deviations in the bending effect of sheets of different thicknesses, resulting in rework. The operation is cumbersome and inconvenient. At the same time, when the length of the workpiece to be bent is large, the bending device is prone to unbalanced force during the bending process in the middle of the workpiece. This results in a convex arc shape in the middle of the workpiece, poor bending quality stability, high rework rate, reduced product quality, and limited applicability.

[0004] Therefore, a new technical solution needs to be researched to address the above problems. Technical solutions

[0005] In view of this, the present invention addresses the deficiencies of the existing technology, and its main objective is to provide a bending machine that uses an eccentric mechanism to control the bending die to shift outwards from the worktable to meet the bending requirements of plates of different thicknesses. Combined with a balancing mechanism, the bending die maintains balance during the bending process, ensuring consistent and stable bending quality, reducing the rework rate, meeting user needs, and having a wide range of applications.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A bending machine includes a body, a holding mechanism for holding and positioning a workpiece, a bending mechanism for bending the workpiece, an eccentric mechanism for adjusting the position of the bending mechanism, a balancing mechanism for assisting in balancing the forces acting on the workpiece during bending, and a control mechanism for controlling the operation of each mechanism; wherein:

[0008] The machine body is provided with a worktable, and the pressing mechanism is provided on the machine body and located above the worktable. The bending mechanism is provided on the machine body and includes a flipping plate, a bending die, and a first driving device. Several bending dies are provided and are arranged sequentially along the length of the worktable at the upper end of the flipping plate. The bending dies are located on one side of the worktable. The eccentric mechanism is provided at both ends of the flipping plate. The bending die is offset to the outside of the worktable under the control of the eccentric mechanism. There are two first driving devices. The two first driving devices are respectively driven by a first rotating shaft to connect to the eccentric mechanism at both ends to control the eccentric mechanism and the flipping plate to rotate together, thereby linking the bending die to perform the bending operation on the workpiece. The balancing mechanism is provided inside the flipping plate to keep the bending die balanced during the bending process of the workpiece. The control mechanism is connected to the conveying mechanism, the pressing mechanism, and the first driving device.

[0009] As a preferred embodiment, the eccentric mechanism includes a fixed base, a movable base, a second rotating shaft, and a second driving device. The first rotating shaft is a hollow structure. The fixed base is provided with a pivot hole that extends from left to right. One end of the first rotating shaft is disposed in the pivot hole. The first driving device is driven and connected to the outside of the first rotating shaft. The movable base is movably disposed on the fixed base. The movable base is provided with an eccentric hole, the center of which is different from the center of the pivot hole. The second rotating shaft is disposed inside the first rotating shaft. One end of the second rotating shaft passes through the first rotating shaft and is disposed in the eccentric hole. The second driving device is driven and connected to the other end of the second rotating shaft. The flip plate is disposed on the movable base.

[0010] As a preferred embodiment, the movable seat is provided with a connecting hole, and a connector for connecting with the second rotating shaft is provided in the connecting hole, and the eccentric hole is provided on the connector.

[0011] As a preferred embodiment, the left and right ends of the flip plate are each provided with a first displacement device. The first displacement device is located below the movable seat. The fixed seat is movably mounted on the machine body. The output end of the first displacement device is connected to the lower end of the movable seat to control the movable seat to rise or fall together with the fixed seat.

[0012] As a preferred embodiment, the balancing mechanism includes a pusher, a balancing block, and a second displacement device. The flipping plate has a movable groove extending left and right. Several first slots, spaced left and right, are provided on the inner wall of the movable groove near the bending die for positioning the balancing block. The first slots are located on the lower side of the bending die, and the balancing block is fitted and positioned in the first slots. The pusher extends left and right and is movably mounted on the movable groove. Several second slots, spaced left and right, are provided on the pusher for positioning the balancing block. The second slots are located on the lower side of the first slots. The second displacement device is driven and connected to the pusher to control the reciprocating left and right movement of the pusher on the movable groove.

[0013] As a preferred embodiment, the upper end of the push bar has a guide slope for pushing the balance block, and the guide slope extends obliquely upward from the first direction to the second direction.

[0014] As a preferred embodiment, two push bars and two second displacement devices are provided. The two push bars and two second displacement devices are arranged opposite each other on the flip plate, and the two push bars are symmetrically arranged on the movable groove.

[0015] As a preferred embodiment, the flip plate includes a top seat and a base connected in sequence, the bending die is disposed on the top seat and protrudes from the upper end of the top seat, and the base has a cavity with one open end, and the cavity is provided with reinforcing ribs.

[0016] As a preferred embodiment, the pressing mechanism includes a pressing mold, a mounting base, and a third displacement device. The pressing mold is detachably mounted on the lower end of the mounting base. The mounting base is provided with a positioning component for pressing and positioning the pressing mold. The positioning component includes a pressing member, an airbag, and an inflation / deflation device. The mounting base is provided with a positioning cavity with an opening at the lower end. The pressing mold is located at the lower end of the opening. The pressing member is movably mounted vertically within the positioning cavity. The airbag is located at the upper end of the pressing member, and the lower end of the pressing member is exposed from the opening. The inflation / deflation device is located outside the mounting base. The outer side of the mounting base is provided with a clearance opening corresponding to the positioning cavity. The inflation / deflation device has an air pipe, which enters the positioning cavity from the clearance opening and connects to the airbag.

[0017] When the mold is assembled on the mounting base, the inflation and deflation device delivers gas into the airbag, which inflates to control the downward movement of the clamping member and clamps it onto the upper end of the mold. When the mold needs to be removed from the mounting base, the inflation and deflation device sucks out the gas from the airbag, which deflates to loosen the clamping member and unlock the mold's position, allowing the mold to be removed.

[0018] As a preferred embodiment, the lower end of the pressing member has a positioning part for contacting the pressing mold, the positioning part being a V-shaped structure that gradually decreases in size from top to bottom, and the upper end of the pressing mold is provided with a positioning groove that matches the positioning part, the positioning groove being a V-shaped groove.

[0019] Compared with the prior art, the present invention has obvious advantages and beneficial effects. Specifically, as can be seen from the above technical solution, it mainly uses the design of each component to input the thickness data of the plate into the control mechanism, and uses the eccentric mechanism to control the bending die to shift to the outside of the worktable to meet the bending requirements of plates of different thicknesses. With the setting of the balancing mechanism, the bending die is kept balanced during the bending process of the workpiece, which ensures the bending effect of the workpiece. The structure is ingenious and reasonable, the bending quality is stable and consistent, the rework rate of the workpiece is reduced, the user needs are met, and the application range is wide.

[0020] Secondly, the setting of the first displacement device is used to adjust the height of the eccentric mechanism, increase the position adjustment of the bending die, and also allow for fine adjustment of the eccentric mechanism, which is beneficial to the position adjustment of the bending die and has good usability. At the same time, the setting of the guide slope facilitates the operation of the balance block from the second slot into the first slot, ensuring the effectiveness of the balancing mechanism and thus improving the bending quality of the workpiece.

[0021] Furthermore, the top seat and base facilitate the replacement and maintenance of the bending die. Combined with the reinforcing ribs, they improve the overall structural strength of the flip plate, ensuring the usability of the bending mechanism. At the same time, the positioning components facilitate the positioning of the die on the mounting base, preventing inconsistencies between adjacent dies and ensuring the usability of the pressing mechanism. Moreover, the positioning part and positioning groove facilitate the pressing and positioning between the positioning part and the die, ensuring accurate pressing and positioning, thereby guaranteeing the stability of the die and its high practicality. Attached Figure Description

[0022] Figure 1 is a perspective view of an embodiment of the present invention;

[0023] Figure 2 is a schematic diagram of the bending mechanism, eccentric mechanism and balancing mechanism according to an embodiment of the present invention;

[0024] Figure 3 is a partially enlarged schematic diagram of part A in Figure 2;

[0025] Figure 4 is a cross-sectional view of the bending mechanism, eccentric mechanism and balancing mechanism according to an embodiment of the present invention;

[0026] Figure 5 is a partially enlarged schematic diagram of part B in Figure 4;

[0027] Figure 6 is a partially enlarged schematic diagram of part C in Figure 4;

[0028] Figure 7 is a perspective view of the pressing mechanism according to an embodiment of the present invention (the third displacement device is not shown in the figure).

[0029] Figure 8 is a perspective view of the pressing mechanism according to an embodiment of the present invention from another angle;

[0030] Figure 9 is a partial cross-sectional view of the pressing mechanism according to an embodiment of the present invention.

[0031] Explanation of reference numerals in the attached diagram:

[0032] 10. Machine body 11. Workbench

[0033] 20. Holding mechanism 21. Pressing mold

[0034] 211. First mounting part; 212. Second mounting slot

[0035] 213. Positioning groove; 22. Mounting base

[0036] 221. Positioning cavity; 222. First mounting groove

[0037] 223. Second installation part; 224. Positioning step

[0038] 225. Clearance opening; 231. Holding component

[0039] 232. Airbag 233. Limiting part

[0040] 234. Positioning unit; 30. Bending mechanism

[0041] 31. Flip plate; 311. Movable slot

[0042] 312, First slot; 313, Top mount

[0043] 314, base; 315, cavity

[0044] 32. Bending die; 33. First driving device

[0045] 34. First rotating shaft; 35. First displacement device

[0046] 36. Reinforcing rib 361. First reinforcing rib

[0047] 362. Second reinforcing rib; 40. Eccentric mechanism

[0048] 41. Fixing base 411. Pivot hole

[0049] 42. Movable seat; 421. Eccentric hole

[0050] 422, Connecting hole; 43, Second rotating shaft

[0051] 44. Second drive unit 45. Connecting component

[0052] 50. Balancing mechanism 51. Push bar

[0053] 511. Second slot; 512. Guide slope

[0054] 52. Balance weight; 60. Control mechanism

[0055] 70. Conveying mechanism. The best embodiment of the present invention

[0056] Please refer to Figures 1 to 9, which show the specific structure of an embodiment of the present invention.

[0057] A bending machine includes a body 10, a holding mechanism 20 for holding and positioning a workpiece, a bending mechanism 30 for bending the workpiece, an eccentric mechanism 40 for adjusting the position of the bending mechanism, a balancing mechanism 50 for assisting in balancing the forces during workpiece bending, and a control mechanism 60 for controlling the operation of each mechanism; wherein:

[0058] A worktable 11 is provided on the machine body 10, and the pressing mechanism 20 is provided on the machine body 10 and located above the worktable 11; the bending mechanism 30 is provided on the machine body 10, and the bending mechanism 30 includes a flipping plate 31, a bending die 32, and a first driving device 33. Several bending dies 32 are provided and sequentially arranged along the length of the worktable 11 at the upper end of the flipping plate 31. The bending dies 32 are located on one side of the worktable 11, and the eccentric mechanism 40 is provided at both ends of the flipping plate 31. As controlled by the eccentric mechanism 40, the bending die 32 is offset to the outside of the worktable 11. It should be noted that the upper end of the bending die 32 will not protrude from the surface of the worktable 11. That is, the upper end face of the bending die 32 is parallel to the worktable 11, or the bending die 32 is located on the lower side of the worktable 11. There are two first driving devices 33. The two first driving devices 33 are respectively driven and connected to the two eccentric mechanisms 40 through the first rotating shaft 34 to control the eccentric mechanism 40 and the flipping plate 31 to rotate together, thereby linking the bending die 32 to perform bending operation on the workpiece.

[0059] Specifically, the eccentric mechanism 40 includes a fixed base 41, a movable base 42, a second rotating shaft 43, and a second driving device 44. The first rotating shaft 34 is a hollow structure. The fixed base 41 is provided with a pivot hole 411 that extends through the left and right sides. One end of the first rotating shaft 34 is disposed in the pivot hole 411. The first driving device 33 is driven and connected to the outside of the first rotating shaft 34. The movable base 42 is movably disposed on the fixed base 41. The movable base 42 is provided with an eccentric hole 421, the center of which is located at... The second rotating shaft 43 is located inside the first rotating shaft 34, with one end of the second rotating shaft 43 passing through the first rotating shaft 34 and positioned on the eccentric hole 421. The second driving device 44 is driven and connected to the other end of the second rotating shaft 43. The flip plate 31 is positioned on the movable seat 42. Preferably, the movable seat 42 is provided with a connecting hole 422, and a connector 45 for connecting with the second rotating shaft is provided in the connecting hole 422. The eccentric hole 421 is positioned on the connector 45.

[0060] The balancing mechanism 50 is disposed inside the flipping plate 31 to maintain the balance of the bending die 32 during the bending process of the workpiece. Specifically, the balancing mechanism 50 includes a pusher 51, a balancing block 52, and a second displacement device (not shown in the figure). The flipping plate 31 has a movable groove 311 extending left and right. Several first slots 312, arranged at left and right intervals, are provided on the inner wall surface of the movable groove 311 near the bending die 32 for placing and positioning the balancing block. The upper end of the first slot 312 passes through the flipping plate 31. The first slot 312 is located on the lower side of the bending die 32. The balance block 52 is adapted and positioned on the first slot 312. The pusher 51 extends to the left and right and is movably arranged on the movable groove 311. The pusher 51 is provided with a number of second slots 511 arranged at left and right intervals for the balance block to be placed and positioned. The second slots 511 are located on the lower side of the first slot 312. The second displacement device is driven and connected to the pusher 51 to control the pusher 51 to move back and forth on the movable groove 311.

[0061] A conveying mechanism 70 for conveying workpieces is also provided. The conveying mechanism 70 is located on the other side of the machine body 10. The worktable 11 is located between the conveying mechanism 70 and the bending mechanism 30. The control mechanism 60 is connected to the first driving device 33, the second driving device 44, the conveying mechanism 70, and the second displacement device.

[0062] In use, the workpiece thickness data is input into the control mechanism to control the second drive device to rotate the second shaft, causing the movable seat to move on the fixed seat. This causes the bending die to shift outward from the worktable, thereby adjusting the relative position between the bending die and the worktable. The conveying mechanism transports the workpiece onto the worktable, and the holding mechanism holds and positions the workpiece on the worktable. The bending position on the workpiece protrudes outside the worktable and is close to the bending die. Simultaneously, the second displacement device controls the pusher to move in the first direction, and the second slot moves to the lower end of the first slot. The balance block on the first slot falls into the second slot. Then, the first drive device controls the flipping plate to rotate the bending die to perform the bending operation on the bending position of the workpiece. During operation, the second displacement device controls the pusher to move in the second direction to push the balance block from the second slot into the first slot, and makes the balance block support the bending die, thereby ensuring that the bending die is in a balanced state during the bending operation. In this way, through the design of each component, the thickness data of the sheet metal is input into the control mechanism, and the eccentric mechanism is used to control the bending die to shift outwards from the worktable to meet the bending requirements of sheets of different thicknesses. With the setting of the balancing mechanism, the bending die maintains balance on the workpiece during the bending process, ensuring the bending effect of the workpiece. The structure is ingenious and reasonable, the bending quality is stable and consistent, the rework rate of the workpiece is reduced, the user needs are met, and the application range is wide.

[0063] Furthermore, the left and right ends of the flip plate 31 are each equipped with a first displacement device 35, which is located below the movable seat 42. The fixed seat 41 is movably mounted on the machine body 10. The output end of the first displacement device 35 is connected to the lower end of the movable seat 42 to control the movable seat 42 to rise or fall together with the fixed seat 41. Correspondingly, the outer side of the first rotating shaft 14 is connected to a lifting device for controlling the lifting of the first drive device and the second drive device. When the first displacement device controls the lifting of the movable seat and the fixed seat, the lifting device simultaneously controls the lifting of the first drive device and the second drive device. Thus, the first displacement device is set to adjust the height of the eccentric mechanism, increase the position adjustment of the bending die, and also allow for fine-tuning of the eccentric mechanism. This is beneficial for the position adjustment of the bending die and improves usability. Combined with the second displacement device, it is beneficial for other components to be raised and lowered together with the eccentric mechanism, avoiding inconsistent heights of other components that may affect the use of the bending mechanism and ensuring the stability of the bending mechanism and the eccentric mechanism.

[0064] The upper end of the push bar 51 has a guide slope 512 for pushing the balance block. The guide slope 512 extends obliquely upward from the first direction to the second direction. There are two push bars 51 and two second displacement devices. The two push bars 51 and the two second displacement devices are arranged opposite each other on the flip plate 31. The two push bars 51 are symmetrically arranged on the movable groove 311. In this way, the guide slope is set to facilitate the operation of pushing the balance block from the second slot into the first slot, ensuring the effectiveness of the balancing mechanism and thus improving the bending quality of the workpiece. At the same time, the setting of two push bars further improves the balance of the bending die during the bending process of the workpiece, thereby improving the bending quality of the workpiece and making it highly practical.

[0065] Furthermore, the flipping plate 31 includes a top seat 313 and a base 314 connected in sequence. The bending die 32 is disposed on the top seat 313 and protrudes from the upper end of the top seat 313. The base 314 has a cavity 315 with one open end. A reinforcing rib 36 is disposed in the cavity 315. The reinforcing rib 36 includes a first reinforcing rib 361 and a second reinforcing rib 362. The first reinforcing rib 361 extends vertically, and the second reinforcing rib 362 extends obliquely. The second reinforcing rib 362 is arranged symmetrically between the three first reinforcing ribs 361. Thus, the top seat and base facilitate the replacement and maintenance of the bending die. Combined with the reinforcing ribs, the overall structural strength of the flipping plate is improved, ensuring the use of the bending mechanism.

[0066] The pressing mechanism 20 includes a pressing mold 21, a mounting base 22, and a third displacement device (not shown in the figure). The pressing mold 21 is detachably mounted on the lower end of the mounting base 22. The mounting base 22 is provided with a positioning component for pressing and positioning the pressing mold. The positioning component includes a pressing member 231, an airbag 232, and an inflation and deflation device (not shown in the figure). The mounting base 22 is provided with a positioning cavity 221 with an opening at the lower end. The pressing mold 21 is located at the lower end of the opening. The pressing member 231 is movably mounted in the positioning cavity 221. The airbag 232 is located at the upper end of the pressing member 231, and the lower end of the pressing member 231 is exposed from the opening. The inflation and deflation device is located outside the mounting base 22. The outer side of the mounting base 22 is provided with a clearance opening 225 corresponding to the positioning cavity. The inflation and deflation device has an air pipe, which enters the positioning cavity 221 from the clearance opening and connects to the airbag 232.

[0067] Specifically, the holding member 231 has a T-shaped structure, and both ends of the holding member 231 have limiting parts 233 for limiting its vertical movement within the positioning cavity. The inner wall of the positioning cavity 221 is provided with a positioning step 224. The lower end of the limiting part 223 contacts the upper end of the positioning step 224 to limit the movement of the holding member 231 within the positioning cavity 221 and ensure the use of the positioning member.

[0068] Furthermore, the outer side of the mold 21 has a first mounting portion 211 extending toward the mounting base, and the mounting base 22 has a corresponding first mounting groove 222 that matches the first mounting portion. The first mounting portion 211 is positioned on the first mounting groove 222. Meanwhile, the outer side of the mounting base 22 has a second mounting portion 223 extending toward the mold, and the upper end of the mold 21 has a second mounting groove 212 that matches the second mounting portion. The second mounting portion 223 is positioned on the second mounting groove 212. The first mounting groove 222 is located below the second mounting portion 223, and the positioning cavity 221 is located between the first mounting groove 222 and the second mounting portion 223.

[0069] When the mold is assembled on the mounting base, the inflation and deflation device delivers gas into the airbag, which inflates to control the downward movement of the clamping member and clamps it onto the upper end of the mold. When the mold needs to be removed from the mounting base, the inflation and deflation device sucks out the gas from the airbag, which deflates to loosen the clamping member and unlock the mold's position, allowing the mold to be disassembled. This facilitates the positioning of the mold on the mounting base, avoids inconsistencies between adjacent molds, and ensures the usability of the clamping mechanism.

[0070] Preferably, the lower end of the pressing member 231 has a positioning part 234 for contacting the pressing mold. The positioning part 234 is a V-shaped structure that gradually decreases in size from top to bottom. The upper end of the pressing mold 21 is provided with a positioning groove 213 that matches the positioning part. The positioning groove 213 is a V-shaped groove, and the height of the positioning groove 213 is less than that of the positioning part 234. Thus, the setting of the positioning part and the positioning groove is beneficial to the pressing and positioning between the positioning member and the pressing mold. The pressing position is accurate and error-free, thereby ensuring the stability of the pressing mold and its practicality.

[0071] The key design feature of this invention is that it inputs the thickness data of the sheet metal into the control mechanism through the design of each component. The eccentric mechanism controls the bending die to shift outwards from the worktable to meet the bending requirements of sheets of different thicknesses. With the addition of a balancing mechanism, the bending die is kept balanced during the bending process, ensuring the bending effect of the workpiece. The structure is ingenious and reasonable, the bending quality is stable and consistent, the rework rate of the workpiece is reduced, the user needs are met, and the application range is wide.

[0072] Secondly, the setting of the first displacement device is used to adjust the height of the eccentric mechanism, increase the position adjustment of the bending die, and also allow for fine adjustment of the eccentric mechanism, which is beneficial to the position adjustment of the bending die and has good usability. At the same time, the setting of the guide slope facilitates the operation of the balance block from the second slot into the first slot, ensuring the effectiveness of the balancing mechanism and thus improving the bending quality of the workpiece.

[0073] Furthermore, the top seat and base facilitate the replacement and maintenance of the bending die. Combined with the reinforcing ribs, they improve the overall structural strength of the flip plate, ensuring the usability of the bending mechanism. At the same time, the positioning components facilitate the positioning of the die on the mounting base, preventing inconsistencies between adjacent dies and ensuring the usability of the pressing mechanism. Moreover, the positioning part and positioning groove facilitate the pressing and positioning between the positioning part and the die, ensuring accurate pressing and positioning, thereby guaranteeing the stability of the die and its high practicality.

[0074] The above description is merely a preferred embodiment of the present invention and does not constitute any limitation on the technical scope of the present invention. Therefore, any minor modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of the present invention shall still fall within the scope of the technical solution of the present invention.

Claims

1. A bending machine, characterized in that: It includes an organic body, a pressing mechanism for pressing and positioning the workpiece, a bending mechanism for bending the workpiece, an eccentric mechanism for adjusting the position of the bending mechanism, a balancing mechanism for assisting in the force balance during workpiece bending and forming, and a control mechanism for controlling the operation of each mechanism; wherein: The machine body is provided with a worktable, and the pressing mechanism is provided on the machine body and located above the worktable. The bending mechanism is provided on the machine body and includes a flipping plate, a bending die, and a first driving device. Several bending dies are provided and are arranged sequentially along the length of the worktable at the upper end of the flipping plate. The bending dies are located on one side of the worktable. The eccentric mechanism is provided at both ends of the flipping plate. The bending die is offset to the outside of the worktable under the control of the eccentric mechanism. There are two first driving devices. The two first driving devices are respectively driven by a first rotating shaft to connect to the eccentric mechanism at both ends to control the eccentric mechanism and the flipping plate to rotate together, thereby linking the bending die to perform the bending operation on the workpiece. The balancing mechanism is provided inside the flipping plate to keep the bending die balanced during the bending process of the workpiece. The control mechanism is connected to the conveying mechanism, the pressing mechanism, and the first driving device.

2. A bending machine according to claim 1, characterized in that: The eccentric mechanism includes a fixed base, a movable base, a second rotating shaft, and a second driving device. The first rotating shaft is a hollow structure. The fixed base has a pivot hole that extends from left to right. One end of the first rotating shaft is located in the pivot hole. The first driving device is driven and connected to the outside of the first rotating shaft. The movable base is movably mounted on the fixed base and has an eccentric hole. The center of the eccentric hole is different from the center of the pivot hole. The second rotating shaft is located inside the first rotating shaft. One end of the second rotating shaft passes through the first rotating shaft and is located in the eccentric hole. The second driving device is driven and connected to the other end of the second rotating shaft. The flip plate is mounted on the movable base.

3. A bending machine according to claim 2, characterized in that: The movable seat is provided with a connecting hole, and a connector for connecting with the second rotating shaft is provided in the connecting hole. The eccentric hole is provided on the connector.

4. A bending machine according to claim 2, characterized in that: The left and right ends of the flip plate are each provided with a first displacement device. The first displacement device is located below the movable seat. The fixed seat is movably mounted on the machine body. The output end of the first displacement device is connected to the lower end of the movable seat to control the movable seat to rise or fall together with the fixed seat.

5. A bending machine according to claim 1, characterized in that: The balancing mechanism includes a pusher, a balancing block, and a second displacement device. The flipping plate has a movable groove extending left and right. Several first slots are arranged at left and right intervals on the inner wall of the movable groove near the bending die for placing and positioning the balancing block. The first slots are located on the lower side of the bending die. The balancing block is adapted and positioned on the first slot. The pusher extends left and right and is movably arranged left and right on the movable groove. Several second slots are arranged at left and right intervals on the pusher for placing and positioning the balancing block. The second slots are located on the lower side of the first slots. The second displacement device is driven and connected to the pusher to control the reciprocating left and right movement of the pusher on the movable groove. In use, the second displacement device controls the pusher to move in the first direction, the second slot moves to the lower end of the first slot, the balance block on the first slot falls onto the second slot, and the first drive device controls the bending die to rotate to perform bending operation on the workpiece. During the rotation, the second displacement device controls the pusher to move in the second direction to push the balance block from the second slot into the first slot, and makes the balance block face the bending die to provide support, thereby achieving a balanced state for the bending die during the bending operation.

6. A bending machine according to claim 5, characterized in that: The upper end of the push bar has a guide slope for pushing the balance block, and the guide slope extends obliquely upward from the first direction to the second direction.

7. A bending machine according to claim 5, characterized in that: Two push bars and two second displacement devices are provided. The two push bars and two second displacement devices are arranged opposite each other on the flip plate, and the two push bars are symmetrically arranged on the movable groove.

8. A bending machine according to claim 1, characterized in that: The flip plate includes a top seat and a base connected in sequence. The bending mold is disposed on the top seat and protrudes from the upper end of the top seat. The base has a cavity with one open end and a reinforcing rib is disposed in the cavity.

9. A bending machine according to claim 1, characterized in that: The pressing mechanism includes a pressing mold, a mounting base, and a third displacement device. The pressing mold is detachably mounted on the lower end of the mounting base. The mounting base is provided with a positioning component for pressing and positioning the pressing mold. The positioning component includes a pressing member, an airbag, and an inflation / deflation device. The mounting base is provided with a positioning cavity with an opening at the lower end. The pressing mold is located at the lower end of the opening. The pressing member is movably mounted in the positioning cavity. The airbag is located at the upper end of the pressing member. The lower end of the pressing member is exposed from the opening. The inflation / deflation device is located outside the mounting base. The outer side of the mounting base is provided with a clearance opening corresponding to the positioning cavity. The inflation / deflation device has an air pipe. The air pipe enters the positioning cavity from the clearance opening and connects to the airbag. When the mold is assembled on the mounting base, the inflation and deflation device delivers gas into the airbag, which inflates to control the downward movement of the clamping member and clamps it onto the upper end of the mold. When the mold needs to be removed from the mounting base, the inflation and deflation device sucks out the gas from the airbag, which deflates to loosen the clamping member and unlock the mold's position, allowing the mold to be removed.

10. A bending machine according to claim 9, characterized in that: The lower end of the pressing member has a positioning part for contacting the pressing mold. The positioning part is a V-shaped structure that gradually decreases in size from top to bottom. The upper end of the pressing mold is provided with a positioning groove that matches the positioning part. The positioning groove is a V-shaped groove.

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