Numerical control double-bending machine

Abstract

The invention discloses a numerical control double-bending machine which comprises a working table, a clamping base is arranged in the middle of the working table, bending machines are further arranged on the working table, a pressing block is arranged on the clamping base, the clamping base is located between the bending machines, and the numerical control double-bending machine is high in universality and production efficiency, and a pipe fitting can be formed at a time.

Description

Technical Field

[0001] The invention belongs to the technical field of pipe bending machines, and in particular to a numerically controlled double bending machine. Background Art

[0002] A pipe bender is a mechanical device used to bend metal pipes. It is widely used in making various pipes, pipelines, furniture, auto parts and other products. Its main function is to bend metal pipes at a certain angle and radius.

[0003] The current double bending machines have the following disadvantages: for long-sized pipe fittings, the double bending machines cannot form them in one go, and multiple processes are required, resulting in low production efficiency; different pipes require molds of different sizes to be formed into the required shapes, which increases the number of mold replacements and costs in production; the distance between molds of some double bending machines is fixed, and the bending angle and bending direction of the pipe fittings cannot be changed, and the two ends of pipe fittings of different lengths cannot be bent, resulting in poor versatility; there are many manual operations, and the pipe fitting processing process requires repeated clamping, which results in high labor intensity and low efficiency for workers.

[0004] The utility model patent with publication number CN211218178U was disclosed on August 11, 2020, and the name is a high-precision limited double-head pipe bending machine, which includes a chassis, a spacing adjustment component, a height adjustment component, a first pipe bending component and a second pipe bending component. The top of the height adjustment component is provided with a workpiece fixing seat, and the workpiece fixing seat includes a base, a column, a limit motor and a limit brush. The base is arranged on the inner surface of the bottom of the workpiece fixing seat, and the base is provided with a scale line. The base is provided with a second slide rail, and a group of columns are sleeved at the bottom end in the second slide rail for sliding. The upper end of the column is provided with a limit motor, and the opposite side of the limit motor is provided with a limit brush. This double-head pipe bending machine also cannot solve the technical problems recorded above. Summary of the invention

[0005] The purpose of the present invention is to provide a CNC double bending machine with high versatility, one-time forming of pipe fittings and high production efficiency in view of the deficiencies in the prior art.

[0006] In order to achieve the above object, the technical solution adopted by the present invention is:

[0007] The CNC double bending machine comprises a workbench, a clamping seat is arranged in the middle of the workbench, a bending machine is also arranged on the workbench, a pressing block is arranged on the clamping seat, and the clamping seat is located between the bending machines.

[0008] The bending machine includes a base, a support is provided on the base, a mounting shell is fixedly connected to the support, a fixing plate is provided on the side of the mounting shell, a third motor is provided on the fixing plate, a mounting shaft is provided in the mounting shell, one end of the mounting shaft extends out of the mounting shell; a driving sprocket is connected to the output end of the third motor, a driven sprocket is provided on the mounting shaft, a chain is connected between the driving sprocket and the driven sprocket, a connecting seat and a bending die are provided on the mounting shaft, a clamping die is fixedly connected to the connecting seat, and the clamping die is located below the bending die.

[0009] The installation shaft includes an inner shaft and an outer shaft, the bending mold is fixedly connected to the inner shaft, the driven sprocket and the connecting seat are fixedly connected to the outer shaft, and a fourth motor is also provided inside the installation shell, and the fourth motor is connected to one end of the inner shaft with a first synchronous pulley mechanism.

[0010] A mounting plate is provided on the outside of the mounting shell, a connecting plate is provided on the mounting plate, a first cylinder is provided on the connecting plate, the first cylinder is connected to the bottom of the clamp, a bending roller is provided on the end of the mounting shaft, the bending roller is located on one side of the bending mold, a clamping roller seat is provided on the clamp, a clamping roller is provided on the clamping roller seat, and the clamping roller is located below the bending roller.

[0011] A third cylinder is provided on the side of the clamping seat, the pressure block is provided in the middle of the turntable, and the third cylinder is connected to the pressure block; the clamping seat includes a turntable, the outer edge of the turntable is provided with external teeth, one side of the turntable is provided with a gear, the external teeth are meshed with the gear, a second motor is provided on the side of the clamping seat, and the second motor and the gear are connected with a second synchronous pulley mechanism; the clamping seat is connected with a bracket, the bracket is located between the bending machines, a first motor is provided on the top of the bracket, and a screw transmission module is connected to the first motor and the clamping seat.

[0012] The bending die includes a first bending groove and a second bending groove, and the clamping die includes a first clamping groove and a second clamping groove, the first bending groove and the first clamping groove are in the same plane, and the second bending groove and the second clamping groove are in the same plane.

[0013] The connecting plate is also provided with a second cylinder, the second cylinder is connected with a supporting roller, the supporting roller is provided with a supporting roller, the clamping roller and the clamping roller are at the same height, and the clamping roller, the supporting roller and the bending roller are in the same plane.

[0014] The workbench is provided with a first guide rail, which is arranged in pairs; a first slider is provided at the bottom of the base, which cooperates with the first guide rail; a driving motor is provided on the base, and a driving gear is connected to the output end of the driving motor; a rack is provided between the first guide rails, and the driving gear is meshed with the rack; a second slider is provided at the bottom of the support, a second guide rail is provided on the base, and the second slider cooperates with the second guide rail; a screw transmission motor is provided at one end of the base; a stopper is provided at the end of the first guide rail, and a buffer block is provided on the stopper.

[0015] The bending machine is symmetrically arranged with respect to the clamping seat.

[0016] An opening is provided at one end of the clamping seat, and the opening is arranged horizontally.

[0017] The technical effect of the present invention is as follows: the CNC double bending machine of the present invention is adopted, through the movement of the bending machine on the first guide rail, the longitudinal movement of the support on the base, the rotation of the bending die and the rotation function of the turntable on the pipe fitting, it is suitable for the processing of long-sized pipe fittings, and meets the production requirements of different bending positions, angles and directions of different pipe fittings. It has high versatility and a one-machine-multiple-purpose function, which greatly improves production efficiency; the pipe fitting only needs to be clamped once in the bending process, and the position accuracy is reliable, which realizes one-time forming of the pipe fitting, is conducive to improving the work efficiency of the overall production line, and at the same time avoids repeated redundant operations of manual multiple clamping, and has high work efficiency; a plurality of mold structures of different sizes are also provided, which saves the number of mold replacements and costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] This specification includes the following drawings, which show the following contents:

[0019] Figure 1 is a structural schematic diagram of a numerically controlled double bending machine of the present invention;

[0020] Figure 2-1 to Figure 2-3 It is a structural schematic diagram of the bending machine of the present invention;

[0021] Figure 3-1 and Figure 3-2 It is a partial structural schematic diagram of the bending machine of the present invention;

[0022] Figure 4-1 and Figure 4-2 is a schematic diagram of the structure of the clamping seat of the present invention;

[0023] Figure 5 It is a structural schematic diagram of a mold of a bending machine of the present invention;

[0024] Figure 6 It is a structural schematic diagram of the installation shaft of the present invention;

[0025] Figure 7It is a structural schematic diagram of the bending machine moving mechanism of the present invention;

[0026] Figure 8 It is a working schematic diagram of the CNC double bending machine of the present invention.

[0027] The markings in the figure are:

[0028] 1. Workbench; 11. First guide rail; 12. First slider; 13. Stopper; 14. Buffer block; 15. Driving gear; 16. Rack; 17. Second slider; 18. Second guide rail; 2. Press brake; 21. Base; 22. Support; 23. Mounting shell; 24. Fixing plate; 25. Driving motor; 26. Mounting plate; 27. Screw drive motor; 3. Clamping seat; 31. Press block; 32. Bracket; 33. Third cylinder; 34. Wheel; 341. External gear; 35. First motor; 36. Gear; 37. Second synchronous pulley mechanism; 38. Second motor; 39. Screw drive module; 4. Bending die; 41. First bending groove; 42. Second bending groove; 43. Bending roller; 5. Clamping die; 51. First clamping groove; 52. Second clamping groove; 53. First cylinder; 54. Second cylinder; 55. Clamping roller seat; 56. Clamping roller; 57. Supporting roller seat; 58. Supporting roller; 6. Third motor; 61. Driving sprocket; 62. Driven sprocket; 63. Chain; 64. Mounting shaft; 641. Inner shaft; 642. Outer shaft; 65. Connecting seat; 66. Keyway; 7. Fourth motor; 71. First synchronous pulley mechanism; 8. Opening. DETAILED DESCRIPTION

[0029] The specific implementation methods of the present invention are further explained in detail below by describing the embodiments with reference to the accompanying drawings, with the aim of helping those skilled in the art to have a more complete, accurate and in-depth understanding of the inventive concept and technical solution of the present invention and facilitating their implementation.

[0030] like Figures 1 to 8 As shown, the CNC double bending machine comprises a workbench 1, a clamping seat 3 is provided in the middle of the workbench 1, a bending machine 2 is also provided on the workbench 1, a pressing block 31 is provided on the clamping seat 3, and the clamping seat 3 is located between the bending machines 2. The clamping seat 3 is located in the middle of the workbench 1, so that the pressing block 31 clamps the middle of the pipe fitting, so that both ends of the pipe fitting are supported by the clamping die 5 or the supporting roller 58, so that the pipe fitting is level as a whole, providing a stable position basis for the subsequent bending process, and the bending machine 2 can move linearly on the workbench 1, and the mold on the bending machine 2 can move longitudinally to meet the processing requirements of long-size pipe fittings.

[0031] like Figure 2-1 to Figure 3-2As shown, the bending machine 2 includes a base 21, a support 22 is provided on the base 21, a mounting shell 23 is fixedly connected to the support 22, a fixing plate 24 is provided on the side of the mounting shell 23, a third motor 6 is provided on the fixing plate 24, a mounting shaft 64 is provided in the mounting shell 23, one end of the mounting shaft 64 extends out from the mounting shell 23; a driving sprocket 61 is connected to the output end of the third motor 6, a driven sprocket 62 is provided on the mounting shaft 64, a chain 63 is connected between the driving sprocket 61 and the driven sprocket 62, a connecting seat 65 and a bending die 4 are provided on the mounting shaft 64, a clamping die 5 is fixedly connected to the connecting seat 65, and the clamping die 5 is located below the bending die 4. The mounting shell 23 provides an installation position for the mounting plate 26 and can also protect the internal components. The power of the third motor 6 is transmitted to the outer shaft 642 of the mounting shaft 64 through the sprocket chain, thereby driving the clamp 5 to rotate along with the connecting seat 65, thereby forming a bending action of the clamp 5; the pipe fitting is bent and formed between the bending die 4 and the clamp 5 as the clamp 5 rotates around the bending die 4.

[0032] like Figure 6 As shown, the installation shaft 64 includes an inner shaft 641 and an outer shaft 642, the bending die 4 is fixedly connected to the inner shaft 641, the driven sprocket 62 and the connecting seat 65 are both fixedly connected to the outer shaft 642, and the fourth motor 7 is also provided inside the installation housing 23, and the fourth motor 7 is connected to one end of the inner shaft 641 by a first synchronous pulley mechanism 71. In the above structure, the power of the fourth motor 7 is transmitted to the bending die 4 through the first synchronous pulley mechanism 71, so that the bending die 4 can rotate a certain angle, extend the bending path of the pipe fitting, and thus adapt to the processing and forming of the pipe fitting in the large bending direction. A keyway 66 is provided at the end of the inner shaft 641, and the power is transmitted by key transmission, so that the bending die 4 and the inner shaft 641 rotate synchronously. Under the conventional process, the fourth motor 7 is not started, and the posture of the bending die 4 is fixed. The installation shaft 64 adopts an inner and outer shaft structure, and the rotation of the bending die 4 and the clamping die 5 is independent of each other, and there will be no spatial interference, and the installation space is saved, and the equipment manufacturing cost is reduced. The first synchronous pulley mechanism 71 and the second synchronous pulley mechanism 37 are both composed of a driving wheel, a driven wheel and a synchronous belt, and the two have the same structure.

[0033] like Figure 2-1 to Figure 3-2 As shown, a mounting plate 26 is provided outside the mounting housing 23, a first cylinder 53 is provided on the mounting plate 26, the first cylinder 53 is connected to the bottom of the clamping die 5, a bending roller 43 is provided at the end of the mounting shaft 64, the bending roller 43 is located at one side of the bending die 4, a clamping roller seat 55 is provided on the clamping die 5, a clamping roller 56 is provided on the clamping roller seat 55, and the clamping roller 56 is located below the bending roller 43. The first cylinder 53 drives the clamping die 5 to move vertically, so that the pipe is in close contact with the clamping groove and the bending groove. The bending roller 43 is a circular structure, and the clamping roller 56 and the bending roller 43 can cooperate to be suitable for bending pipes with conventional bending angles and radii.

[0034] like Figure 3-1 and Figure 3-2 As shown, a third cylinder 33 is provided on the side of the clamping seat 3, a pressure block 31 is provided in the middle of a turntable 34, and the third cylinder 33 is connected to the pressure block 31; the clamping seat 3 includes a turntable 34, an outer edge of the turntable 34 is provided with an external tooth 341, a gear 36 is provided on one side of the turntable 34, and the external tooth 341 is meshed with the gear 36, a second motor 38 is provided on the side of the clamping seat 3, and the second motor 38 and the gear 36 are connected with a second synchronous pulley mechanism 37; the clamping seat 3 is connected with a bracket 32, the bracket 32 ​​is located between the bending machine 2, a first motor 35 is provided on the top of the bracket 32, and the first motor 35 and the clamping seat 3 are connected with a screw transmission module 39. The third cylinder 33 drives a pair of pressing blocks 3 to press the pipe fittings, and the second motor 38 transmits power to the gear 36 through the synchronous pulley mechanism. The gear 36 engages the external teeth 341 to rotate the turntable 34. Since the middle part of the pipe fitting is clamped and fixed by the pressing block 31, the rotation of the turntable 34 will drive the pipe fitting to rotate, changing the bending plane of the pipe fitting, which can meet the production of special-shaped parts and has high versatility. Compared with the traditional manual adjustment of the angle of the pipe fitting, it avoids the inaccurate position accuracy when the pipe fitting is re-clamped, and reduces the labor intensity of manual labor. The screw drive module 39 is an existing structure. The screw drive module 39 is vertically arranged. Since the planes of each clamping groove are different, the vertical movement of the clamping seat 3 is realized by using the screw drive module 39. After the pressing block 31 clamps the pipe fitting, the vertical movement of the clamping seat 3 can drive the pipe fitting to adjust its height, so that the pipe fitting can be switched to support the required clamping groove.

[0035] like Figure 5 As shown, the bending die 4 includes a first bending groove 41 and a second bending groove 42, and the clamping die 5 includes a first clamping groove 51 and a second clamping groove 52. The first bending groove 41 and the first clamping groove 51 are in the same plane, and the second bending groove 42 and the second clamping groove 52 are in the same plane. The bending grooves are arranged in an arc shape, and the clamping grooves are arranged horizontally. The radius of the bending grooves on the first bending groove 41, the second bending groove 42 and the bending roller 43 decreases successively, and is used for forming the pipe fitting to different bending angles. The first bending groove 41 corresponds to the first clamping groove 51, and the cooperation of the two can make the pipe fitting have a larger radius after bending. The second bending groove 42 corresponds to the second clamping groove 52, and the cooperation of the two can make the pipe fitting have a medium-sized radius after bending.

[0036] like Figure 5 As shown, the mounting plate 26 is further provided with a second cylinder 54, the second cylinder 54 is connected to a support roller 57, the support roller 58 is provided on the support roller 57, the clamping roller 56 and the clamping roller 56 are at the same height, and the clamping roller 56, the support roller 58 and the bending roller 43 are in the same plane. The second cylinder 54 drives the support roller 58 to move vertically, so that the pipe is supported at multiple points, which is conducive to ensuring the horizontal alignment of the pipe. The clamping roller 56, the support roller 58 and the bending roller 43 are arranged in the same plane, and the posture of the pipe is stable, which is conducive to improving the forming quality of the pipe.

[0037] like Figure 7 As shown, the workbench 1 is provided with a first guide rail 11, and the first guide rails 11 are arranged in pairs. A first slider 12 is provided at the bottom of the base 21, and the first slider 12 cooperates with the first guide rail 11. A driving motor 25 is provided on the base 21, and a driving gear 15 is connected to the output end of the driving motor 25. A rack 16 is provided between the first guide rails 11, and the driving gear 15 is meshed with the rack 16; a second slider 17 is provided at the bottom of the support 22, and a second guide rail 18 is provided on the base 21, and the second slider 17 cooperates with the second guide rail 18. A screw drive motor 24 is provided at one end of the base 21; a stopper 13 is provided at the end of the first guide rail 11, and a buffer block 14 is provided on the stopper 13. The linear movement of the bending machine 2 and the longitudinal movement of the support 22 constitute the planar movement of the bending die 4 and the clamping die 5, realizing the process of switching the bending position of the pipe fitting and the process of switching the bending die 4 and the clamping die 5, which is beneficial to the one-time forming of the pipe fitting, thereby improving the production efficiency; the driving motor 25 realizes the linear movement of the bending machine 2 along the first guide rail 11 through the meshing transmission of the driving gear 15 and the rack 16, so as to achieve the purpose of adjusting the position of the bending machine 2 on the workbench 1, and can adapt to the bending processing of large-sized and long pipe fittings; the first slide block 12 cooperates with the first guide rail 11 to accurately guide the position movement of the bending machine 2, and adopts the meshing transmission of the gear 36 and the rack 16 to ensure the reliable position accuracy of the bending machine 2. The screw drive module 39 is built inside the base 21 and can be reliably protected. The longitudinal movement of the bending die 4 and the clamping die 5 is realized by driving the screw drive motor 24. For pipes that need to be bent multiple times, they can be switched to another pair of bending grooves and clamping grooves in one bending process, thereby meeting the production of different bending radii at different positions of pipes; the second slider 17 and the second guide rail 18 arranged in pairs cooperate to accurately guide the longitudinal movement of the support 22 to ensure the position accuracy of the bending die 4 and the clamping die 5 after movement. The stopper 13 has an anti-slip effect on the movement of the bending machine 2, and the buffer block 14 can buffer the impact of the bending contacting the stopper 13, further improving the safety protection effect.

[0038] like Figure 1 As shown, the bending machine 2 is symmetrically arranged about the clamping seat 3. The clamping seat 3 is used to clamp the middle of the pipe fitting, and the two bending machines 2 move synchronously relative to or oppositely on the workbench 1, so that the bending and forming effects of both ends of the pipe fitting are synchronized and consistent, ensuring the overall forming effect of the pipe fitting.

[0039] like Figure 3-2 As shown, an opening 8 is provided at one end of the clamping seat 3, and the opening 8 is arranged horizontally. The opening 8 is the loading and unloading position of the pipe fittings, and the opening 8 is arranged horizontally, so as to be matched with the loading and unloading manipulator. The pipe fittings are fed into the pressing blocks 31 along the opening 8 by the manipulator, and the processed pipe fittings are also unloaded from the opening 8 accordingly.

[0040] like Figure 1 and Figure 8As shown, the working process is as follows: the pipe fitting is placed between the pressing blocks 31 along the opening 8 by the manipulator, the first cylinder 53 is started to clamp the middle of the pipe fitting, and the driving motor 25 drives the two bending machines 2 to the corresponding positions on the linear track according to the length and bending position of the pipe fitting, and the screw drive motor 24 drives the support 22 of the bending machine 2 to move longitudinally, so as to ensure that the pipe fitting is supported by the clamping die 5 or the supporting roller 58, and the posture of the pipe fitting is ensured to be horizontal, and the corresponding bending die 4 and clamping die 5 are selected according to the required forming shape of the pipe fitting; During the bending process, the first cylinder 53 starts to push the clamping die 5 / support roller 58 to move vertically, so that the upper and lower sides of the pipe fitting are closely contacted with the bending groove and the clamping groove respectively. The third motor 6 drives the installation shaft 64 to rotate through the sprocket chain 63, and the installation shaft 64 drives the connecting seat 65 and the clamping die 5 to rotate. The clamping die 5 rotates around the bending die 4 as the center, and the pipe fitting is bent and formed between the bending groove and the clamping groove; after the pipe fitting is bent, the cylinder releases the clamping of the pressure block 31, and each mechanism is reset, and the pipe fitting is removed from the opening 8 by the manipulator.

[0041] According to production requirements, if the pipe fitting needs to be bent multiple times continuously, the straight section of the pipe fitting will gradually decrease, and the driving motor 25 drives to switch the positions of the two bending machines 2 to achieve continuous bending; if the pipe fitting needs to form different bending radii during multiple bending processes, the bending die 4 and the clamping die 5 are switched by the screw drive motor 24 to meet the forming requirements; if the pipe fitting has a forming requirement in a large bending direction, the bending die 4 is rotated by starting the fourth motor 7, so that the bending die 4 follows the clamping die 5 to rotate to meet the forming requirements; if some pipe fittings need to be formed into special-shaped parts, after the previous bending, the second motor 38 drives the synchronous pulley to change the angle of the turntable 34, and the bending machine 2 moves to avoid the rotation process of the pipe fitting. Since the pressure block 31 always presses the pipe fitting, the rotation of the turntable 34 will drive the pipe fitting to rotate, so that the bent part of the pipe fitting is at an angle to the plane where the mold is located, and then the above steps can be used to bend the specified position of the pipe fitting, so that the pipe fitting can be formed into a specified shape. The above steps can be performed selectively or sequentially according to production requirements, and have a wide range of applications.

[0042] This CNC double bending machine, through the movement of the bending machine 2 on the first guide rail 11, the longitudinal movement of the support 22 on the base 21, the rotation of the bending die 4 and the rotation function of the turntable 34 on the pipe fittings, is suitable for the processing of long-sized pipe fittings and meets the production requirements of different bending positions, angles and directions of different pipe fittings. It has high versatility and a one-machine-multiple-purpose function, which greatly improves production efficiency. The pipe fittings only need to be clamped once in the bending process, and the position accuracy is reliable, which realizes one-time forming of the pipe fittings, is conducive to improving the work efficiency of the overall production line, and at the same time avoids repeated redundant operations of manual multiple clamping, and has high work efficiency. A plurality of mold structures of different sizes are also provided, which saves the number of mold replacements and costs.

[0043] The present invention is described above by way of example in conjunction with the accompanying drawings. Obviously, the specific implementation of the present invention is not limited to the above-mentioned methods. As long as various non-substantial improvements are made using the method concept and technical solution of the present invention; or the above concept and technical solution of the present invention are directly applied to other occasions without improvement, they are all within the protection scope of the present invention.

Claims

1. A CNC double bending machine, characterized in that: It comprises a workbench (1), a clamping seat (3) is provided in the middle of the workbench (1), a bending machine (2) is also provided on the workbench (1), a pressing block (31) is provided on the clamping seat (3), and the clamping seat (3) is located between the bending machines (2).

2. The CNC double bending machine according to claim 1, characterized in that: The bending machine (2) comprises a base (21), a support (22) is provided on the base (21), a mounting shell (23) is fixedly connected to the support (22), a fixing plate (24) is provided on the side of the mounting shell (23), a third motor (6) is provided on the fixing plate (24), a mounting shaft (64) is provided in the mounting shell (23), one end of the mounting shaft (64) extends out from the mounting shell (23); a driving sprocket (61) is connected to the output end of the third motor (6), a driven sprocket (62) is provided on the mounting shaft (64), a chain (63) is connected between the driving sprocket (61) and the driven sprocket (62), a connecting seat (65) and a bending die (4) are provided on the mounting shaft (64), a clamping die (5) is fixedly connected to the connecting seat (65), and the clamping die (5) is located below the bending die (4).

3. The CNC double bending machine according to claim 2, characterized in that: The installation shaft (64) comprises an inner shaft (641) and an outer shaft (642), the bending mold (4) is fixedly connected to the inner shaft (641), the driven sprocket (62) and the connecting seat (65) are both fixedly connected to the outer shaft (642), and a fourth motor (7) is also provided inside the installation housing (23), and a first synchronous pulley mechanism (71) is connected to one end of the fourth motor (7) and the inner shaft (641).

4. The CNC double bending machine according to claim 3, characterized in that: A mounting plate (26) is provided on the outside of the mounting shell (23), a first cylinder (53) is provided on the mounting plate (26), the first cylinder (53) is connected to the bottom of the clamping die (5), a bending roller (43) is provided at the end of the mounting shaft (64), the bending roller (43) is located on one side of the bending die (4), a clamping roller seat (55) is provided on the clamping die (5), a clamping roller (56) is provided on the clamping roller seat (55), and the clamping roller (56) is located below the bending roller (43).

5. The CNC double bending machine according to claim 4, characterized in that: The clamping seat (3) is provided with a third cylinder (33) on the side, the pressure block (31) is arranged in the middle of the rotating disk (34), and the third cylinder (33) is connected to the pressure block (31); the clamping seat (3) comprises a rotating disk (34), the outer edge of the rotating disk (34) is provided with an external tooth (341), one side of the rotating disk (34) is provided with a gear (36), the external tooth (341) is meshed with the gear (36), the side of the clamping seat (3) is provided with a second motor (38), the second motor (38) and the gear (36) are connected with a second synchronous pulley mechanism (37); the clamping seat (3) is connected with a bracket (32), the bracket (32) is located between the bending machines (2), the top of the bracket (32) is provided with a first motor (35), and the first motor (35) and the clamping seat (3) are connected with a screw transmission module (39).

6. The CNC double bending machine according to claim 5, characterized in that: The bending die (4) comprises a first bending groove (41) and a second bending groove (42); the clamping die (5) comprises a first clamping groove (51) and a second clamping groove (52); the first bending groove (41) and the first clamping groove (51) are located in the same plane; and the second bending groove (42) and the second clamping groove (52) are located in the same plane.

7. The CNC double bending machine according to claim 6, characterized in that: The mounting plate (26) is also provided with a second cylinder (54), the second cylinder (54) is connected to a supporting roller (57), the supporting roller (58) is provided on the supporting roller (57), the clamping roller (56) and the clamping roller (56) are at the same height, and the clamping roller (56), the supporting roller (58) and the bending roller (43) are in the same plane.

8. The CNC double bending machine according to any one of claims 2 to 7, characterized in that: The workbench (1) is provided with a first guide rail (11), the first guide rails (11) are arranged in pairs, the bottom of the base (21) is provided with a first slider (12), the first slider (12) cooperates with the first guide rail (11), the base (21) is provided with a driving motor (25), the output end of the driving motor (25) is connected with a driving gear (15), a rack (16) is provided between the first guide rails (11), the driving gear (15) is meshed with the rack (16); the bottom of the support (22) is provided with a second slider (17), the base (21) is provided with a second guide rail (18), the second slider (17) cooperates with the second guide rail (18), and one end of the base (21) is provided with a screw transmission motor (24); a stopper (13) is provided at the end of the first guide rail (11), and a buffer block (14) is provided on the stopper (13).

9. The CNC double bending machine according to claim 8, characterized in that: The bending machine (2) is arranged symmetrically with respect to the clamping seat (3).

10. The CNC double bending machine according to claim 9, characterized in that: An opening (8) is provided at one end of the clamping seat (3), and the opening (8) is arranged horizontally.

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