High-precision electro-hydraulic servo full numerical control bending machine

Abstract

The invention relates to the technical field of numerical control bending machines, in particular to a high-precision electro-hydraulic servo full numerical control bending machine which comprises a first adjusting frame, a center frame is fixedly connected to one side of the first adjusting frame, and a second adjusting frame is fixedly connected to one side of the center frame. Reciprocating lead screws are arranged at the two ends of the interiors of the first adjusting frame, the center frame and the second adjusting frame, and a lifting frame is fixedly connected to the surface of the center frame. Through the arrangement of the first adjusting frame, the center frame, the second adjusting frame, the reciprocating lead screw, the lifting frame and the bottom bracket, the whole electro-hydraulic servo full numerical control bending machine can complete steel plate bending operation in a high-precision mode by switching multiple sets of lifting bending dies, and in the actual using process, the bending efficiency is improved, and the bending efficiency is improved. A worker firstly positions and inserts a steel plate raw material needing to be bent into a machining groove of a machining frame from a conveying groove, and at the moment, an anti-collision rubber frame on the inner wall of the conveying groove can conduct attaching anti-collision operation on the steel plate at the front conveying groove and the rear conveying groove.

Description

Technical Field

[0001] The invention relates to the technical field of CNC bending machines, in particular to a high-precision electro-hydraulic servo fully CNC bending machine. Background Art

[0002] CNC bending machine uses the equipped mold to bend cold metal sheets into workpieces of various geometric cross-sectional shapes. It is a sheet forming machine designed for cold rolled sheet metal processing. It is widely used in sheet bending processing in industries such as automobiles, aircraft manufacturing, light industry, shipbuilding, containers, elevators, and railway vehicles. Bending machines generally use a special CNC system for bending machines. The coordinate axis of the bending machine has developed from a single axis to twelve axes. The CNC system can automatically realize the slider running depth control, slider left and right tilt adjustment, rear stopper front and back adjustment, left and right adjustment, pressure tonnage adjustment, and slider approach working speed adjustment, etc., which can make the bending machine convenient to realize the actions of slider downward, inching, continuous, pressure holding, return and midway stop, and complete multiple bends of the same angle or different angles at one time. For head bending, first turn on the power, turn on the switch on the control panel, and then start the oil pump, so that you can hear the sound of the oil pump turning, but the machine does not perform any action at this time. When using the stroke adjustment, you must pay attention to adjusting the stroke. Be sure to test before bending. When the upper mold moves down to the bottom, there must be a gap of the plate thickness, otherwise it will cause damage to the mold machine. The stroke adjustment also has electric quick adjustment. For the selection of bending notches, generally choose a notch eight times the width of the plate thickness. For example, when bending a sheet of millimeters, you need to choose a notch of about thirty-two. The rear stop adjustment generally has electric quick adjustment and manual fine-tuning. The method is the same as the shearing machine. Press the foot switch to start bending. The CNC bending machine mold is different from the shearing machine. It can be released at any time. Release the foot to stop and continue to move down.

[0003] For example, the patent document with the announcement number CN 114101400 A discloses a high-precision oil-electric hybrid electro-hydraulic servo CNC bending machine, including a bending machine body, a movable mounting plate is slidably connected to the upper front side of the bending machine body, a workbench is provided on the lower front side of the bending machine body, an upper die and a lower die are respectively installed on the movable mounting plate and the workbench, a tool for bending is connected to the upper die, and a positioning groove matched with the bending tool is connected to the lower die; a multiple driving device for driving the upper die to move up and down is installed on the bending machine body, and the multiple driving device includes a first oil cylinder and a second oil cylinder, and the output ends of the first oil cylinder and the second oil cylinder are connected to an output rod through an oil pipe, and the output rod is connected to the upper die, which is used to drive the upper die to move up and down. The present application optimizes and improves the driving mechanism and the multi-axis material baffle plate, effectively improves the bending accuracy and efficiency, has a high overall degree of automation, low noise, good application diversity, and significantly improved comprehensive practicality, and is worthy of promotion and application.

[0004] However, when this structure is used in an electro-hydraulic servo fully CNC bending machine, due to the limitations of its own structure, the bending mold it uses is usually a fixed installation structure. When the steel plate is processed to different bending degrees in daily life, the steel plate needs to be frequently switched on multiple CNC bending machines, which is prone to steel plate processing errors, seriously affecting the processing efficiency of the CNC bending machine on the steel plate, and the equipment cannot perform precise positioning, fastening and protection operations between the bending mold and the pressing piece of the CNC bending machine, and cannot guarantee the quality of steel plate processing. At the same time, when the equipment is bending the steel plate on the CNC bending machine, it is unable to perform a more precise and stable comprehensive positioning and protection operation on the steel plate, and cannot guarantee the stability of the steel plate when bending, and cannot meet daily use needs. Therefore, it is urgent to design a high-precision electro-hydraulic servo fully CNC bending machine to solve the above problems. Summary of the invention

[0005] The purpose of the present invention is to provide a high-precision electro-hydraulic servo fully CNC bending machine to solve the problem that the existing structure proposed in the above background technology is that when the electro-hydraulic servo fully CNC bending machine is used, due to the limitation of its own structure, the bending mold used is usually a fixed installation structure. When the steel plate is processed to different bending degrees in daily life, the steel plate needs to be frequently switched on multiple CNC bending machines for processing, which is very likely to cause steel plate processing errors, seriously affecting the processing efficiency of the CNC bending machine on the steel plate, and the equipment cannot perform precise positioning, fastening and protection operations between the bending mold and the pressing piece of the CNC bending machine, and cannot guarantee the quality of steel plate processing. At the same time, when the equipment is bending the steel plate on the CNC bending machine, it is impossible to perform a more precise and stable comprehensive positioning and protection operation on the steel plate, and cannot guarantee the stability of the steel plate when bending, and cannot meet daily use needs.

[0006] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a high-precision electro-hydraulic servo fully CNC bending machine, comprising a first adjustment frame, one side of the first adjustment frame is fixedly connected to a center frame, one side of the center frame is fixedly connected to a second adjustment frame, both ends of the first adjustment frame, the center frame and the second adjustment frame are provided with reciprocating screw rods, the surface of the center frame is fixedly connected to a lifting frame, the bottom end of the center frame is fixedly connected to a bottom bracket, the back of the second adjustment frame is fixedly connected to a transmission frame, and a driving motor is provided at one end of the back of the transmission frame;

[0007] A processing frame, wherein the surface of the center frame is fixedly connected to the processing frame, one side of the processing frame is fixedly connected to a loading rack, the other side of the processing frame is fixedly connected to a discharging rack, the top of the processing frame is fixedly connected to an equipment frame, a bending machine body is arranged inside the equipment frame, and a control panel is arranged on one side of the equipment frame.

[0008] Preferably, a processing groove is provided inside the processing frame, lifting grooves are provided at the upper and lower ends of the processing frame, a material conveying groove is provided at the front and rear sides of the processing frame, and an anti-collision rubber frame is provided on the inner wall of the material conveying groove.

[0009] Preferably, the upper and lower ends of the loading rack and the unloading rack are fixedly connected with retractable arc covers, and the interior of the retractable arc covers is movably connected with an arc-shaped top plate.

[0010] Preferably, one end of the arc-shaped top plate is fixedly connected to a top connecting bar, and a material conveying chute is provided on the side of the top connecting bar.

[0011] Preferably, an airbag groove is provided inside the bottom bracket, lifting side airbags are provided on both sides of the inner wall of the airbag groove, and a lifting center airbag is provided at the inner center of the lifting side airbag.

[0012] Preferably, the interior of the central frame is movably connected to a movable inner frame via a reciprocating screw rod, the interior of the movable inner frame is movably connected to multiple sets of lifting and bending molds, and a limiting rubber frame is provided on the inner wall of the lifting frame.

[0013] Preferably, two ends of the center frame are fixedly connected with first positioning seats, and two ends of the processing frame are fixedly connected with second positioning seats.

[0014] Preferably, a connecting pipe is provided between the first positioning seat and the second positioning seat, and an air pump is provided at the center of the first positioning seat and the second positioning seat.

[0015] Preferably, the inner walls of the first positioning seat and the second positioning seat are provided with contraction grooves, the inner walls of the contraction grooves are provided with contraction airbags, and the side centers of the contraction airbags are provided with top joints.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] The high-precision electro-hydraulic servo fully CNC bending machine, through the first adjustment frame, center frame, second adjustment frame, reciprocating screw, lifting frame, bottom bracket, transmission frame, drive motor, processing frame, equipment frame, bending machine body, control panel, processing trough, lifting trough, feed trough, anti-collision rubber frame, airbag trough, lifting side airbag, lifting center airbag, movable inner frame, lifting bending mold and limit rubber frame, can make the electro-hydraulic servo fully CNC bending machine as a whole switch multiple groups of lifting bending molds to ensure that the equipment completes the steel plate bending operation with high precision. In the actual use process, the staff first positions the steel plate raw material to be bent from the feed trough and inserts it into the processing trough of the processing frame. At this time, the anti-collision rubber frame on the inner wall of the feed trough can perform the anti-collision operation of the steel plate at the front and rear feed troughs, and then starts the bending machine body inside the equipment frame through the control panel to quickly perform the steel plate raw material inside the processing trough. During the pressing and bending operation, the driving motor can be started daily to cooperate with the transmission structure inside the transmission frame to synchronously drive the reciprocating screws at both ends of the first adjustment frame, the center frame and the second adjustment frame to rotate and drive the moving inner frame as a whole, so that the multiple sets of lifting and bending molds inside the moving inner frame can be adaptively docked with the limiting rubber frame on the inner wall of the lifting frame. At this time, it is only necessary to start the lifting side airbags and the lifting center airbags at the airbag groove inside the bottom bracket, and the lifting side airbags are connected from the bottom of the lifting frame. After that, the lifting center airbag is used to lift the lifting and bending mold inside the moving inner frame, so that the lifting and bending mold of the required size can be adaptively extended out of the lifting frame, and cooperate with the bending machine body inside the equipment frame to perform high-precision bending processing operations that are adaptive up and down, which reflects the practicality of the equipment design.

[0018] The high-precision electro-hydraulic servo fully CNC bending machine further improves the overall use effect of the equipment by setting the first adjustment frame, center frame, second adjustment frame, reciprocating screw, processing frame, loading frame, discharging frame, contraction arc cover, arc-shaped top plate, top connection bar, feed chute, first positioning seat, second positioning seat, connecting pipe, air pump, contraction groove, contraction airbag and top joint. In daily use, when the staff extends the steel plate into the processing frame, the loading frame and the discharging frame on the front and rear sides of the processing frame can obtain the adaptive loading and unloading limit operation. At this time, the steel plate can be opened up and down from the feed chute of the top connection bar between the arc-shaped top plates. The upper and lower arc-shaped top plates can be adaptively contracted toward the inside of their respective contraction arc covers to perform the limited top connection operation on the steel plate in the center. Later, when the steel plate is in the processing frame When bending is performed inside the working frame, the steel plate that fluctuates up and down can also obtain stable top pressure limiting operations at the top connecting strips between the arc-shaped top plates, thereby ensuring the stability of the steel plate when bending and fluctuating at all times and improving the stability of the steel plate bending. At the same time, when the bending machine body and the mobile inner frame are docked, the air pump can be started to synchronize the first positioning seats and the second positioning seats at both ends of the center frame and the processing frame through the connecting pipe, so that the shrinkage airbags inside the first positioning seats and the second positioning seats can be inflated and ejected inside the shrinkage groove, and then the top joints on the side are used to respectively perform top connection and reinforcement operations on the two places of the bending machine body and the mobile inner frame, thereby ensuring the firmness of the equipment when bending the steel plate, improving the quality of steel plate bending, and reflecting the comprehensiveness of the equipment design. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a three-dimensional schematic diagram of the structure of the present invention;

[0020] Figure 2 It is an overall schematic diagram of the processing frame structure of the present invention;

[0021] Figure 3 It is an overall schematic diagram of the first adjustment frame, the center frame and the second adjustment frame structure of the present invention;

[0022] Figure 4 is an overall schematic diagram of the bottom bracket structure of the present invention;

[0023] Figure 5 It is an overall schematic diagram of the first positioning seat and the second positioning seat structure of the present invention;

[0024] Figure 6 It is an overall schematic diagram of the structure of the loading rack and the unloading rack of the present invention;

[0025] Figure 7 For the present invention Figure 1 A magnified schematic diagram of the structure at center A;

[0026] Figure 8 For the present invention Figure 1 A magnified schematic diagram of the structure at B in the figure.

[0027] In the figure: 1. first adjustment frame; 2. center frame; 3. second adjustment frame; 4. reciprocating screw rod; 5. lifting frame; 6. bottom bracket; 7. transmission frame; 8. driving motor; 9. processing frame; 10. loading frame; 11. unloading frame; 12. equipment frame; 13. bending machine body; 14. control panel; 15. processing groove; 16. lifting groove; 17. feeding groove; 18. anti-collision rubber frame; 19. shrinking arc cover; 20. arc top plate; 21. top connection strip; 22. feeding chute; 23. airbag groove; 24. lifting side airbag; 25. lifting center airbag; 26. moving inner frame; 27. lifting bending mold; 28. limit rubber frame; 29. ​​first positioning seat; 30. second positioning seat; 31. connecting pipe; 32. air pump; 33. shrinking groove; 34. shrinking airbag; 35. top joint. DETAILED DESCRIPTION

[0028] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0029] See also Figure 1-8 , an embodiment provided by the present invention:

[0030] A high-precision electro-hydraulic servo fully CNC bending machine comprises a first adjusting frame 1, one side of the first adjusting frame 1 is fixedly connected to a center frame 2, one side of the center frame 2 is fixedly connected to a second adjusting frame 3, reciprocating screw rods 4 are arranged at both ends of the first adjusting frame 1, the center frame 2 and the second adjusting frame 3, a lifting frame 5 is fixedly connected to the surface of the center frame 2, a bottom bracket 6 is fixedly connected to the bottom end of the center frame 2, a transmission frame 7 is fixedly connected to the back of the second adjusting frame 3, a driving motor 8 is arranged at one end of the back of the transmission frame 7, the interior of the center frame 2 is movably connected to a moving inner frame 26 through a reciprocating screw rod 4, the interior of the moving inner frame 26 is movably connected to multiple groups of lifting and bending molds 27, a limited position rubber frame 28 is arranged on the inner wall of the lifting frame 5, first positioning seats 29 are fixedly connected to both ends of the center frame 2, second positioning seats 30 are fixedly connected to both ends of the processing frame 9, a connecting pipe 31 is arranged between the first positioning seat 29 and the second positioning seat 30, an air pump 32 is arranged in the center of the first positioning seat 29 and the second positioning seat 30, and the first positioning seat The inner wall of the second positioning seat 30 is provided with a contraction groove 33, the inner wall of the contraction groove 33 is provided with a contraction airbag 34, and the side center of the contraction airbag 34 is provided with a top joint 35. The driving motor 8 is started, and the transmission structure inside the transmission frame 7 is coordinated to synchronously drive the reciprocating screw rods 4 at both ends inside the first adjustment frame 1, the center frame 2 and the second adjustment frame 3 to rotate and drive the mobile inner frame 26 inside the first adjustment frame 1, the center frame 2 and the second adjustment frame 3 to reciprocate as a whole, so as to achieve the above-mentioned operation. The multiple groups of lifting and bending molds 27 inside the movable inner frame 26 are adaptively docked with the limiting rubber frame 28 on the inner wall of the lifting frame 5. At this time, it is only necessary to start the lifting side airbags 24 and the lifting center airbags 25 at the airbag grooves 23 inside the bottom bracket 6. The lifting side airbags 24 are connected from the bottom of the lifting frame 5, and then the lifting center airbags 25 are lifted against the lifting and bending molds 27 inside the movable inner frame 26, so that the lifting and bending molds 27 of the required size can be adaptively extended out of the lifting frame 5.

[0031] Processing frame 9, the surface of the center frame 2 is fixedly connected with the processing frame 9, one side of the processing frame 9 is fixedly connected with a loading frame 10, the other side of the processing frame 9 is fixedly connected with a discharging frame 11, the top of the processing frame 9 is fixedly connected with an equipment frame 12, a bending machine body 13 is arranged inside the equipment frame 12, and a control panel 14 is arranged on one side of the equipment frame 12. A processing groove 15 is opened inside the processing frame 9, and lifting grooves 16 are opened at the upper and lower ends of the processing frame 9. A feeding groove 17 is opened on the front and rear sides of the processing frame 9, and an anti-collision rubber frame 18 is arranged on the inner wall of the feeding groove 17. The upper and lower ends of the loading frame 10 and the discharging frame 11 are fixedly connected with a shrinking arc cover 19, and the interior of the shrinking arc cover 19 is movably connected with an arc top plate 20, one end of the arc top plate 20 is fixedly connected with a top connecting strip 21, and a feeding chute 22 is opened on the side of the top connecting strip 21. An airbag groove 23 is provided inside the bottom bracket 6, and lifting side airbags 24 are provided on both sides of the inner wall of the airbag groove 23. A lifting center airbag 25 is provided in the inner center of the lifting side airbag 24. When the steel plate is extended into the processing frame 9, the adaptive loading and unloading limit operations can be obtained at the loading rack 10 and the unloading rack 11 on the front and rear sides of the processing frame 9. At this time, the steel plate can be pushed up and down from the feeding chute 22 of the top connecting strip 21 between the arc-shaped top plates 20. The upper and lower arc-shaped top plates 20 can be adaptively contracted toward the inside of their respective contraction arc covers 19 to perform a limit top connection operation on the steel plate in the center. Subsequently, when the steel plate is bent inside the processing frame 9, the steel plate that fluctuates up and down can also obtain a stable up and down top pressure limit operation at the top connecting strip 21 between the arc-shaped top plates 20, thereby ensuring the stability of the steel plate when it is bent and fluctuated at all times.

[0032] Working principle: When in use, the user first positions the steel plate material to be bent from the feed trough 17 and inserts it into the processing trough 15 of the processing frame 9. At this time, the anti-collision rubber frame 18 on the inner wall of the feed trough 17 can perform the anti-collision operation of the steel plate at the front and rear feed troughs 17. Then, the bending machine body 13 inside the equipment frame 12 is started through the control panel 14 to quickly press and bend the steel plate material inside the processing trough 15. At the same time, the driving motor 8 can be started daily to cooperate with the transmission structure inside the transmission frame 7 to synchronously drive the reciprocating screw rods 4 at both ends of the first adjustment frame 1, the center frame 2 and the second adjustment frame 3 to rotate and drive the first adjustment frame 1, the center frame 2 and the second adjustment frame 3. The mobile inner frame 26 inside the frame 3 is driven back and forth as a whole, so that the multiple sets of lifting and bending molds 27 inside the mobile inner frame 26 are adaptively docked with the limiting rubber frame 28 on the inner wall of the lifting frame 5. At this time, it is only necessary to start the lifting side airbags 24 and the lifting center airbags 25 at the airbag grooves 23 inside the bottom bracket 6. The lifting side airbags 24 are connected from the bottom of the lifting frame 5. After that, the lifting center airbags 25 are lifted against the lifting and bending molds 27 inside the mobile inner frame 26, so that the lifting and bending molds 27 of the required size are adaptively extended out of the lifting frame 5, and cooperate with the bending machine body 13 inside the equipment frame 12 to perform high-precision bending processing operations that are adaptively matched up and down. In daily use, when the staff extends the steel plate into the processing frame 9, the adaptive loading and unloading limit operations can be obtained at the loading racks 10 and the unloading racks 11 on the front and rear sides of the processing frame 9. At this time, the steel plate can be pushed up and down from the feeding chute 22 of the top connecting strip 21 between the arc-shaped top plates 20. The upper and lower arc-shaped top plates 20 can be adaptively retracted toward the inside of their respective retracting arc covers 19 to perform a limited top connection operation on the steel plate in the center. Subsequently, when the steel plate is bent inside the processing frame 9, the steel plate that fluctuates up and down can also obtain a stable upper and lower top pressure limit operation at the top connecting strip 21 between the arc-shaped top plates 20, thereby ensuring the stability of the steel plate when it is bent and fluctuated at all times. The invention can improve the stability of steel plate bending, and at the same time, after the bending machine body 13 and the movable inner frame 26 are docked, the air pump 32 can be started to inflate the first positioning seat 29 and the second positioning seat 30 at both ends of the center frame 2 and the processing frame 9 through the connecting pipe 31, so that the shrinkage airbags 34 inside the first positioning seat 29 and the second positioning seat 30 can be inflated and ejected inside the shrinkage groove 33, and then the side top joints 35 are used to respectively connect and reinforce the two places of the bending machine body 13 and the movable inner frame 26, so as to ensure the firmness of the equipment when bending the steel plate and improve the quality of steel plate bending. The above is the whole working principle of the invention.

[0033] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

Claims

1. A high-precision electro-hydraulic servo fully CNC bending machine, comprising a first adjustment frame (1), characterized in that: One side of the first adjustment frame (1) is fixedly connected to a center frame (2), one side of the center frame (2) is fixedly connected to a second adjustment frame (3), both ends of the first adjustment frame (1), the center frame (2) and the second adjustment frame (3) are provided with reciprocating screw rods (4), the surface of the center frame (2) is fixedly connected to a lifting frame (5), the bottom end of the center frame (2) is fixedly connected to a bottom bracket (6), the back side of the second adjustment frame (3) is fixedly connected to a transmission frame (7), and a driving motor (8) is provided at one end of the back side of the transmission frame (7); A processing frame (9), the surface of the center frame (2) is fixedly connected to the processing frame (9), one side of the processing frame (9) is fixedly connected to a loading frame (10), the other side of the processing frame (9) is fixedly connected to a discharging frame (11), the top of the processing frame (9) is fixedly connected to an equipment frame (12), a bending machine body (13) is arranged inside the equipment frame (12), and a control panel (14) is arranged on one side of the equipment frame (12).

2. A high-precision electro-hydraulic servo fully CNC bending machine according to claim 1, characterized in that: A processing groove (15) is provided inside the processing frame (9), lifting grooves (16) are provided at the upper and lower ends of the processing frame (9), a material conveying groove (17) is provided at the front and rear sides of the processing frame (9), and an anti-collision rubber frame (18) is provided on the inner wall of the material conveying groove (17).

3. A high-precision electro-hydraulic servo fully CNC bending machine according to claim 1, characterized in that: The upper and lower ends of the loading rack (10) and the unloading rack (11) are fixedly connected with a retractable arc cover (19), and the interior of the retractable arc cover (19) is movably connected with an arc-shaped top plate (20).

4. A high-precision electro-hydraulic servo fully CNC bending machine according to claim 3, characterized in that: One end of the arc-shaped top plate (20) is fixedly connected to a top connecting bar (21), and a material conveying chute (22) is provided on the side of the top connecting bar (21).

5. The high-precision electro-hydraulic servo fully CNC bending machine according to claim 1, characterized in that: An airbag groove (23) is provided inside the bottom bracket (6), lifting side airbags (24) are provided on both sides of the inner wall of the airbag groove (23), and a lifting center airbag (25) is provided at the inner center of the lifting side airbag (24).

6. The high-precision electro-hydraulic servo fully CNC bending machine according to claim 1, characterized in that: The interior of the central frame (2) is movably connected to a movable inner frame (26) via a reciprocating screw rod (4), the interior of the movable inner frame (26) is movably connected to multiple groups of lifting and bending molds (27), and the inner wall of the lifting frame (5) is provided with a limiting rubber frame (28).

7. The high-precision electro-hydraulic servo fully CNC bending machine according to claim 1, characterized in that: The two ends of the center frame (2) are fixedly connected to first positioning seats (29), and the two ends of the processing frame (9) are fixedly connected to second positioning seats (30).

8. The high-precision electro-hydraulic servo fully CNC bending machine according to claim 7, characterized in that: A connecting pipe (31) is provided between the first positioning seat (29) and the second positioning seat (30), and an air pump (32) is provided at the center of the first positioning seat (29) and the second positioning seat (30).

9. The high-precision electro-hydraulic servo fully CNC bending machine according to claim 7, characterized in that: The inner walls of the first positioning seat (29) and the second positioning seat (30) are provided with contraction grooves (33), the inner walls of the contraction grooves (33) are provided with contraction airbags (34), and the side centers of the contraction airbags (34) are provided with top joints (35).

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