Deflection compensation device of hydraulic lower workbench of bending machine

Abstract

The invention relates to the technical field of bending machines, in particular to a bending machine hydraulic lower workbench deflection compensation device which comprises a bending machine frame, a control panel is fixedly connected to the front surface of the bending machine frame, a top plate is installed on the upper surface of the bending machine frame, and a side block is fixedly connected to the right side surface of the top plate. A hydraulic cylinder body is installed on the top face of the side block, and the output end of the hydraulic cylinder body penetrates through the interior of the side block and is provided with a bending upper die. The lower die base is installed on the upper surface of the compensation base, and an installation shaft is installed on the lower surface of the compensation base. The compensation base and the lower die base can be restored to the original positions, the overall restoration effect is good, deflection compensation can be conducted on the compensation base in the inclined state through the design, the compensation base can be restored to the initial position after operation every time, and the compensation base can be synchronously adjusted to be horizontal no matter which end of the compensation base is inclined.

Description

Technical Field

[0001] The invention relates to the technical field of bending machines, in particular to a deflection compensation device for a hydraulic lower working table of a bending machine. Background Art

[0002] Bending machines are a type of forging machinery, mainly used in the metal processing industry. The products are widely used in aviation, light industry, metallurgy, automobile, electric power, electrical appliances and other industries to provide the required special machinery and complete equipment. When the rigidity and strength of the forging machinery itself can meet the work tasks, the weight of the machinery is always designed to be as simple as possible. The application of hydraulic technology has gradually eliminated the original design, and the structure of the machine has become lighter and lighter, greatly reducing the cost of the machine. But this also brings many problems. During use, the slider and the workbench will bend unevenly, and for multi-cylinder large-tonnage bending machines, the workbench will also be deformed due to its length and deadweight, which will cause the depth of the upper die entering the lower die during the bending process to be inconsistent over the entire length of the bending, affecting the bending accuracy. Therefore, the bending machine needs to be deflected.

[0003] In this regard, China's patent application number: CN117000831A discloses a deflection compensation device for a bending machine workbench, including a bending machine frame and a lower die seat, the bending machine frame is fixedly provided with a platform seat, the platform seat is fixedly provided with a compensation seat, a deflection compensation mechanism is arranged in the compensation seat, the lower die seat is installed on the deflection compensation mechanism, both ends of the compensation seat are fixedly provided with head plates, and the head plates are used to limit the installation of the lower die seat; the deflection compensation mechanism includes a motor seat plate and a guide seat plate fixedly provided in the compensation seat, a plurality of jacking plates are slidably penetrated and connected on the guide seat plate, a driving motor is fixedly provided on the motor seat plate, and a driving mechanism is installed on the output end of the driving motor, and the driving mechanism is used to drive the lifting and moving of the jacking plate; the present invention adopts a driving motor and a driving mechanism at the same time to realize the synchronous driving of multiple jacking plates, and the structure of the whole deflection compensation device is simple and easy to operate.

[0004] However, in actual use, when moving between multiple sets of upper and lower inclined blocks, the inclination degree of the compensation seat cannot be synchronously processed as a whole. At the same time, the stability of the compensation seat cannot be ensured after the processing is completed, which will cause errors in subsequent use. The overall device cannot be adjusted to the initial position immediately after the operation is completed, so the overall deflection compensation has certain limitations. Therefore, it has become an urgent problem to be solved to perfect and improve the above-mentioned problems. Summary of the invention

[0005] The object of the present invention is to provide a deflection compensation device for the hydraulic lower worktable of a bending machine, so as to solve the problem proposed in the above-mentioned background technology that when moving between multiple groups of upper inclined blocks and lower inclined blocks, the inclination degree of the compensation seat cannot be synchronously processed as a whole, and the stability of the compensation seat cannot be ensured after the processing is completed, so there will be errors in subsequent use, and the overall device cannot be adjusted to the initial position immediately after the operation is completed, so that the overall deflection compensation has certain limitations.

[0006] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a deflection compensation device for a hydraulic lower worktable of a bending machine, comprising a bending frame, a control panel fixedly connected to the front surface of the bending frame, a top plate installed on the upper surface of the bending frame, a side block fixedly connected to the right surface of the top plate, a hydraulic cylinder body installed on the top surface of the side block, an output end of the hydraulic cylinder body passing through the inside of the side block is installed with a bending upper die, a first scanning plate, a compensation seat and a second scanning plate are installed on the top surface of the bending frame in sequence from back to front, and a horizontal scanner is installed inside the first scanning plate and the second scanning plate;

[0007] A lower die base, wherein the lower die base is mounted on the upper surface of a compensation base, a mounting shaft is mounted on the lower surface of the compensation base, a spring rotating shaft is mounted on the lower surface of the mounting shaft, a bottom plate is mounted on the lower end of the spring rotating shaft, a telescopic column is mounted on the lower end of the bottom plate, and a telescopic cylinder is mounted on the outer surface of the telescopic column.

[0008] Preferably, a bottom ring is provided inside the telescopic cylinder, and a telescopic rod and a spring body are sequentially installed at the lower end of the bottom ring from left to right, and two groups of telescopic rods are provided and evenly installed on both sides of the spring body.

[0009] Preferably, a first moving cylinder and a second moving cylinder are sequentially installed inside the bending frame from front to back, and the top surfaces of the first moving cylinder and the second moving cylinder are both provided with stabilizing blocks.

[0010] Preferably, a first connecting frame is installed on the outer surface of the first moving cylinder, and a second connecting frame is installed on the outer surface of the second moving cylinder.

[0011] Preferably, a fixing block is installed on the inner side wall of the bending machine frame, and an electric push rod is installed on the front surface of the fixing block.

[0012] Preferably, a rack plate is installed at one end of the electric push rod away from the fixed block, and the left side surface of the rack plate is meshedly connected with the second gear and the first gear from front to back.

[0013] Preferably, the upper surfaces of the second gear and the first gear are fixedly connected with a connecting rod, the top surface of the connecting rod is installed with a rotating cylinder, the interior of the rotating cylinder is installed with a lifting column, the outer surface of the rotating cylinder is provided with an arc groove, and the interior of the arc groove is provided with a convex column.

[0014] Preferably, a mounting seat is installed on the upper end surface of the bending machine frame, and a mounting plate is installed on the top surface of the mounting seat.

[0015] Preferably, connection blocks are installed on the front and rear surfaces of the mounting plate, and a measuring angle ruler is installed on the front surface of the connection block.

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

[0017] 1. The deflection compensation device of the hydraulic lower working table of the bending machine is provided with a hydraulic cylinder body, a bending upper die, a first scanning plate, a compensation seat, a second scanning plate, a horizontal scanner, a lower die seat, a mounting shaft, a spring rotating shaft, a bottom plate, a telescopic column, a telescopic cylinder, a bottom ring, a telescopic rod, a spring body, a first moving cylinder and a second moving cylinder. When in use, firstly, the hydraulic cylinder body is started to drive the bending upper die to move downward through the hydraulic cylinder body, so that the bending upper die can be driven downward to contact the surface of the lower die seat, and the workpiece can be bent. When the bending is completed, the position of the compensation seat will have a tilt deviation. Firstly, the horizontal scanner inside the first scanning plate and the second scanning plate can be used to scan the surfaces of the compensation seat and the lower die seat. During irradiation, when one of the two groups of horizontal scanners does not irradiate the surface of the second scanning plate and the lower die seat, the compensation seat and the lower die seat are in a tilted state. The compensation seat can be supported as a whole by installing the shaft and the spring shaft, and the overall support effect is good. At the same time, the spring shaft is elastic, so when the compensation seat is downward as a whole, the telescopic column is squeezed, and then the telescopic column will move inside the telescopic cylinder. At the same time, when the compensation seat is tilted, the spring shaft will also rotate. By installing a telescopic rod and a spring body inside the telescopic cylinder, the telescopic column can be buffered to a certain extent by the telescopic rod and the spring body, and the telescopic column can be automatically reset by the elasticity of the spring body, and then the electric push rod is started, and then The rack plate is driven forward by the electric push rod, and then the rack plate will contact the second gear and the first gear during movement, so that the second gear and the first gear will rotate, and then when the second gear rotates, the second gear will drive the connecting rod to rotate, and then the connecting rod will drive the rotating cylinder to rotate. When the rotating cylinder rotates, the convex column will move inside the arc groove, thereby driving the lifting column to rise. Similarly, the lifting column on the top surface of the first gear will also rise. When the right end of the compensation seat is higher than the left end, the lifting column on the top surface of the first gear will contact the second connecting frame. At this time, the second connecting frame drives the stabilizing block on the top surface not to contact the lower surface of the mounting shaft. Similarly, when the lifting column on the top surface of the second gear rises, It will contact the lower surface of the first connecting frame, so that the first connecting frame will rise, and then the first connecting frame will drive the stabilizing block to rise, so that the stabilizing block will drive the installation shaft to return to its original position. When the installation shaft returns to its original position, the stabilizing block on the top surface of the second moving cylinder will also contact the lower surface of the installation shaft, so that the two sets of stabilizing blocks will contact the surface of the installation shaft as a whole, thereby resetting the position of the installation shaft. Similarly, the compensation seat and the lower mold seat will also return to their original positions, and the overall recovery effect is good. This design can compensate for the deflection of the compensation seat in an inclined state, so that the compensation seat will return to its initial position after each operation, and no matter which end of the compensation seat is tilted, the compensation seat can be adjusted to a level synchronously, which reflects the functionality of the design.

[0018] 2. The deflection compensation device of the hydraulic lower workbench of the bending machine is provided with a rack plate, a first gear, a second gear, a connecting rod, a rotating cylinder, a lifting column, an arc groove, a convex column, a mounting seat, a mounting plate, a connecting block and a measuring angle ruler. When in use, after the deflection compensation of the compensation seat is completed, the rack plate is driven to return to its original position by the electric push rod, so that the spring body and the first gear can be driven to rotate in the opposite direction. At this time, the lifting column will drop, so that the first connecting frame will not be interfered, and then the first moving cylinder and the second moving cylinder will automatically drop, so as not to affect the subsequent bending operation, and then when the operation is After the operation is completed, the design of the telescopic rod and the spring body can drive the telescopic column to automatically restore to its original height, and when the installation axis is interfered by the two sets of stabilizing blocks, it can also drive the spring shaft and the bottom plate to slowly rise and return to their original positions. After the deflection compensation operation, the levelness between the compensation seat and the measuring angle ruler can be observed with the naked eye to detect the levelness between the compensation seat and the measuring angle ruler. At the same time, when the compensation seat is still in a tilted state after the operation is completed, the design of the measuring angle ruler can measure its tilt angle, so that the overall detection effect after the operation is better, which reflects the ingenuity of the 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 a schematic diagram of the disassembly of the installation shaft and telescopic cylinder structure of the present invention;

[0021] Figure 3 It is a three-dimensional schematic diagram of the installation shaft and rack plate structure of the present invention;

[0022] Figure 4 It is a schematic diagram of the disassembly of the telescopic column and telescopic cylinder structure of the present invention;

[0023] Figure 5 It is a schematic diagram of the disassembly of the compensation seat and the first scanning plate structure of the present invention;

[0024] Figure 6 It is a three-dimensional schematic diagram of the rack plate and the first gear structure of the present invention;

[0025] Figure 7 It is a three-dimensional schematic diagram of the connecting rod and the rotating cylinder structure of the present invention;

[0026] Figure 8 It is a three-dimensional schematic diagram of the mounting base and the angle measuring ruler structure of the present invention.

[0027] In the figure: 1. bending frame; 2. control panel; 3. top plate; 4. side block; 5. hydraulic cylinder body; 6. bending upper die; 7. first scanning plate; 8. compensation seat; 9. second scanning plate; 10. horizontal scanner; 11. lower die seat; 12. mounting shaft; 13. spring rotating shaft; 14. bottom plate; 15. telescopic column; 16. telescopic cylinder; 17. bottom ring; 18. telescopic rod; 19. spring body; 20. first moving cylinder; 21. second moving cylinder; 22. stabilizing block; 23. first connecting frame; 24. second connecting frame; 25. fixing block; 26. electric push rod; 27. rack plate; 28. first gear; 29. ​​second gear; 30. connecting rod; 31. rotating cylinder; 32. lifting column; 33. arc groove; 34. convex column; 35. mounting seat; 36. mounting plate; 37. connecting block; 38. measuring angle ruler. 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-Figure 8 , an embodiment provided by the present invention:

[0030] A deflection compensation device for a hydraulic lower workbench of a bending machine. The bending frame 1, control panel 2, hydraulic cylinder body 5, compensation seat 8, horizontal scanner 10, telescopic rod 18, electric push rod 26 and measuring angle ruler 38 used in this application are all products that can be directly purchased on the market. Their principles and connection methods are all existing technologies well known to those skilled in the art, so they are not repeated here. It includes a bending frame 1, the front surface of the bending frame 1 is fixedly connected to the control panel 2, the upper surface of the bending frame 1 is installed with a top plate 3, the right side surface of the top plate 3 is fixedly connected to a side block 4, the top surface of the side block 4 is installed with a hydraulic cylinder body 5, the output end of the hydraulic cylinder body 5 passes through the inside of the side block 4 and is installed with a bending upper die 6, and the top surface of the bending frame 1 is installed with a first Scanning plate 7, compensation seat 8 and second scanning plate 9, the first scanning plate 7 and the second scanning plate 9 are both installed with a horizontal scanner 10, the first moving cylinder 20 and the second moving cylinder 21 are installed in sequence inside the bending frame 1 from front to back, the top surfaces of the first moving cylinder 20 and the second moving cylinder 21 are both provided with a stabilizing block 22, the outer surface of the first moving cylinder 20 is installed with a first connecting frame 23, the outer surface of the second moving cylinder 21 is installed with a second connecting frame 24, the inner side wall of the bending frame 1 is installed with a fixed block 25, the front surface of the fixed block 25 is installed with an electric push rod 26, the end of the electric push rod 26 away from the fixed block 25 is installed with a rack plate 27, the left side surface of the rack plate 27 is meshed and connected with a second gear 29 and a first gear 28 from front to back, and the second gear The upper surfaces of the first gear 28 and the first gear 29 are both fixedly connected with a connecting rod 30, a rotating cylinder 31 is installed on the top surface of the connecting rod 30, a lifting column 32 is installed inside the rotating cylinder 31, an arc groove 33 is provided on the outer surface of the rotating cylinder 31, and a convex column 34 is provided inside the arc groove 33. A mounting seat 35 is installed on the upper end surface of the bending frame 1, a mounting plate 36 is installed on the top surface of the mounting seat 35, and connecting blocks 37 are installed on the front and rear surfaces of the mounting plate 36. A measuring angle ruler 38 is installed on the front surface of the connecting block 37. When the deflection compensation of the compensation seat 8 is completed, the rack plate 27 is driven by the electric push rod 26 to restore to its original position, so that the spring body 19 and the first gear 28 can be driven to rotate in the opposite direction. At this time, the lifting column 32 will drop, so that the first connecting frame 23 is not affected. When the first moving cylinder 20 and the second moving cylinder 21 are in contact, the first moving cylinder 20 and the second moving cylinder 21 will automatically drop, so as not to affect the subsequent bending operation. Then, when the operation is completed, the design of the telescopic rod 18 and the spring body 19 can drive the telescopic column 15 to automatically restore the initial height, and the mounting shaft 12 can also drive the spring rotating shaft 13 and the bottom plate 14 to slowly rise and restore to their original positions when the two sets of stabilizing blocks 22 are in contact. After the deflection compensation operation is performed, the levelness between the compensation seat 8 and the measuring angle ruler 38 can be observed by naked eyes, and the levelness between the compensation seat 8 and the measuring angle ruler 38 can be detected. At the same time, when the compensation seat 8 is still in a tilted state after the operation is completed, the tilt angle can be measured by the design of the measuring angle ruler 38, so that the overall detection effect after the operation is better.

[0031] The lower die base 11 is installed on the upper surface of the compensation base 8, the lower surface of the compensation base 8 is installed with a mounting shaft 12, the lower surface of the mounting shaft 12 is installed with a spring shaft 13, the lower end of the spring shaft 13 is installed with a bottom plate 14, the lower end of the bottom plate 14 is installed with a telescopic column 15, the outer surface of the telescopic column 15 is installed with a telescopic cylinder 16, the interior of the telescopic cylinder 16 is provided with a bottom ring 17, the lower end of the bottom ring 17 is sequentially installed with a telescopic rod 18 and a spring body 19 from left to right, the telescopic rod 18 is provided with two groups, and is evenly installed on both sides of the spring body 19, by starting the hydraulic cylinder body 5, the hydraulic cylinder body 5 drives the bending upper die 6 to move downward, thereby being able to drive the bending upper die 6 downward to contact the surface of the lower die base 11, and the workpiece can be bent. When the bending is completed, the position of the compensation seat 8 will have a tilt deviation. First, the horizontal scanner 10 inside the first scanning plate 7 and the second scanning plate 9 can irradiate the surface of the compensation seat 8 and the lower die seat 11. When one of the two groups of horizontal scanners 10 does not irradiate the surface of the second scanning plate 9 and the lower die seat 11, the compensation seat 8 and the lower die seat 11 are in a tilted state. The compensation seat 8 can be supported as a whole by the mounting shaft 12 and the spring shaft 13. The overall support effect is good. At the same time, the spring shaft 13 is elastic. When the compensation seat 8 is downward as a whole, the telescopic column 15 is squeezed, and then the telescopic column 15 will move inside the telescopic cylinder 16. At the same time, when the compensation seat 8 is tilted, the spring shaft 13 will also rotate. By installing a telescopic rod 18 and a spring body 19 inside the telescopic cylinder 16, the telescopic column 15 can be buffered to a certain extent by the telescopic rod 18 and the spring body 19, and the telescopic column 15 can be automatically reset by the elasticity of the spring body 19, and then the electric push rod 26 is started, and then the rack plate 27 is driven by the electric push rod 26 to move forward, and then the rack plate 27 will contact the second gear 29 and the first gear 28 during movement, so that the second gear 29 and the first gear 28 will rotate, and then when the second gear 29 rotates, the second gear 29 will drive the connecting rod 30 to rotate, and then the connecting rod 30 will drive the rotating cylinder 31 to rotate, and when the rotating cylinder 31 rotates, the convex column 34 will be inside the arc groove 33 The lifting column 32 moves, thereby driving the lifting column 32 to rise. Similarly, the lifting column 32 on the top surface of the first gear 28 will also rise. When the right end of the compensation seat 8 is higher than the left end, the lifting column 32 on the top surface of the first gear 28 hits the second connecting frame 24. At this time, the second connecting frame 24 drives the stabilizing block 22 on the top surface and does not hit the lower surface of the installation shaft 12. Similarly, when the lifting column 32 on the top surface of the second gear 29 rises, it will hit the lower surface of the first connecting frame 23, so that the first connecting frame 23 will rise, and then the first connecting frame 23 will drive the stabilizing block 22 to rise, so that the stabilizing block 22 will drive the installation shaft 12 to return to its original position. When the installation shaft 12 returns to its original position, the stabilizing block 22 on the top surface of the second moving cylinder 21 will also hit the lower surface of the installation shaft 12.Therefore, the two groups of stabilizing blocks 22 will contact the surface of the installation shaft 12, thereby resetting the position of the installation shaft 12. Similarly, the compensation seat 8 and the lower die seat 11 will also return to their original positions. The overall recovery effect is good. This design can compensate the deflection of the compensation seat 8 in a tilted state, so that the compensation seat 8 will return to its initial position after each operation, and the compensation seat 8 can be adjusted to a level synchronously no matter which end of the compensation seat 8 is tilted.

[0032] Working principle: When the staff uses the device, first connect the device to an external power supply to provide power support for the device, first start the hydraulic cylinder body 5, and drive the bending upper die 6 to move downward through the hydraulic cylinder body 5, so that the bending upper die 6 can be driven downward to contact the surface of the lower die seat 11, and the workpiece can be bent. When the bending is completed, the position of the compensation seat 8 will have a tilt deviation. First, the horizontal scanner 10 inside the first scanning plate 7 and the second scanning plate 9 can irradiate the surface of the compensation seat 8 and the lower die seat 11. When one of the two groups of horizontal scanners 10 does not irradiate the surface of the second scanning plate 9 and the lower die seat 11, the compensation seat 8 and The lower die seat 11 is in a tilted state, and the compensation seat 8 can be supported as a whole by installing the shaft 12 and the spring shaft 13, and the overall supporting effect is good. At the same time, the spring shaft 13 is elastic, so that when the compensation seat 8 is downward as a whole, the telescopic column 15 is squeezed, and then the telescopic column 15 will move inside the telescopic cylinder 16. At the same time, when the compensation seat 8 is tilted, the spring shaft 13 will also rotate. The telescopic rod 18 and the spring body 19 are installed inside the telescopic cylinder 16. The telescopic rod 18 and the spring body 19 can provide a certain buffer for the telescopic column 15, and the elasticity of the spring body 19 can automatically reset the telescopic column 15, and then start the electric The electric push rod 26 then drives the rack plate 27 to move forward, and then the rack plate 27 will contact the second gear 29 and the first gear 28 during movement, so that the second gear 29 and the first gear 28 will rotate, and then when the second gear 29 rotates, the second gear 29 will drive the connecting rod 30 to rotate, and then the connecting rod 30 will drive the rotating cylinder 31 to rotate, and when the rotating cylinder 31 rotates, the protruding column 34 will move inside the arc groove 33, so as to drive the lifting column 32 to rise, and similarly, the lifting column 32 on the top surface of the first gear 28 will also rise, and when the right end of the compensation seat 8 is higher than the left end, the lifting column 32 on the top surface of the first gear 28 will also rise. When the column 32 contacts the second connecting frame 24, the second connecting frame 24 drives the stabilizing block 22 on the top surface to prevent it from contacting the lower surface of the mounting shaft 12. Similarly, when the lifting column 32 on the top surface of the second gear 29 rises, it will contact the lower surface of the first connecting frame 23, so that the first connecting frame 23 will rise, and then the first connecting frame 23 will drive the stabilizing block 22 to rise, so that the stabilizing block 22 will drive the mounting shaft 12 to return to its original position. When the mounting shaft 12 returns to its original position, the stabilizing block 22 on the top surface of the second moving cylinder 21 will also contact the lower surface of the mounting shaft 12, so that the two groups of stabilizing blocks 22 will contact the surface of the mounting shaft 12, so that the position of the mounting shaft 12 is reset.

[0033] When the deflection compensation of the compensation seat 8 is completed, the rack plate 27 is driven to return to its original position by the electric push rod 26, so that the spring body 19 and the first gear 28 can be driven to rotate in the opposite direction. At this time, the lifting column 32 will drop, so that the first connecting frame 23 is not interfered with, and then the first moving cylinder 20 and the second moving cylinder 21 will automatically drop, so as not to affect the subsequent bending operation. Then, when the operation is completed, the design of the telescopic rod 18 and the spring body 19 can drive the telescopic column 15 to automatically restore its initial height, and the mounting shaft 12 can also drive the spring rotating shaft 13 and the bottom plate 14 to slowly rise and return to their original positions when the two sets of stabilizing blocks 22 interfere with each other. After the deflection compensation operation is performed, the levelness between the compensation seat 8 and the measuring angle ruler 38 can be observed by the naked eye, and the levelness between the compensation seat 8 and the measuring angle ruler 38 can be detected. At the same time, when the compensation seat 8 is still in a tilted state after the operation is completed, its tilt angle can be measured by the design of the measuring angle ruler 38. The above is all the working principles of the present invention.

[0034] The above description is only a preferred embodiment of the present invention and does not limit the present invention in any form. Any ordinary technician in the industry can smoothly implement the present invention as shown in the drawings and described above. However, any equivalent changes, modifications and evolutions made by technicians familiar with the profession without departing from the scope of the technical solution of the present invention using the technical content disclosed above are all equivalent embodiments of the present invention. At the same time, any equivalent changes, modifications and evolutions made to the above embodiments based on the essential technology of the present invention are still within the protection scope of the technical solution of the present invention.

Claims

1. A deflection compensation device for a hydraulic lower workbench of a bending machine, comprising a bending frame (1), a control panel (2) fixedly connected to the front surface of the bending frame (1), a top plate (3) mounted on the upper surface of the bending frame (1), a side block (4) fixedly connected to the right side surface of the top plate (3), a hydraulic cylinder body (5) mounted on the top surface of the side block (4), an output end of the hydraulic cylinder body (5) passing through the interior of the side block (4) and a bending upper die (6) mounted thereon, characterized in that: The top surface of the bending machine frame (1) is sequentially mounted with a first scanning plate (7), a compensation seat (8) and a second scanning plate (9) from the back to the front, and a horizontal scanner (10) is mounted inside the first scanning plate (7) and the second scanning plate (9); A lower die base (11) is installed on the upper surface of a compensation base (8), a mounting shaft (12) is installed on the lower surface of the compensation base (8), a spring rotating shaft (13) is installed on the lower surface of the mounting shaft (12), a bottom plate (14) is installed at the lower end of the spring rotating shaft (13), a telescopic column (15) is installed at the lower end of the bottom plate (14), and a telescopic cylinder (16) is installed on the outer surface of the telescopic column (15).

2. The deflection compensation device for the hydraulic lower working table of a bending machine according to claim 1, characterized in that: A bottom ring (17) is provided inside the telescopic cylinder (16), and a telescopic rod (18) and a spring body (19) are sequentially installed at the lower end of the bottom ring (17) from left to right. The telescopic rods (18) are provided in two groups and are evenly installed on both sides of the spring body (19).

3. The deflection compensation device for the hydraulic lower worktable of a bending machine according to claim 1, characterized in that: A first moving cylinder (20) and a second moving cylinder (21) are sequentially installed inside the bending machine frame (1) from front to back, and a stabilizing block (22) is provided on the top surface of each of the first moving cylinder (20) and the second moving cylinder (21).

4. The deflection compensation device for the hydraulic lower worktable of a bending machine according to claim 3, characterized in that: A first connecting frame (23) is installed on the outer surface of the first moving cylinder (20), and a second connecting frame (24) is installed on the outer surface of the second moving cylinder (21).

5. The deflection compensation device for the hydraulic lower working table of a bending machine according to claim 1, characterized in that: A fixing block (25) is installed on the inner side wall of the bending machine frame (1), and an electric push rod (26) is installed on the front surface of the fixing block (25).

6. The deflection compensation device for the hydraulic lower worktable of a bending machine according to claim 5, characterized in that: A rack plate (27) is installed at one end of the electric push rod (26) away from the fixed block (25), and the left side surface of the rack plate (27) is meshed with a second gear (29) and a first gear (28) from front to back.

7. The deflection compensation device for the hydraulic lower worktable of a bending machine according to claim 6, characterized in that: The upper surfaces of the second gear (29) and the first gear (28) are both fixedly connected to a connecting rod (30), a rotating cylinder (31) is installed on the top surface of the connecting rod (30), a lifting column (32) is installed inside the rotating cylinder (31), an arc-shaped groove (33) is opened on the outer surface of the rotating cylinder (31), and a convex column (34) is provided inside the arc-shaped groove (33).

8. The deflection compensation device for the hydraulic lower worktable of a bending machine according to claim 1, characterized in that: A mounting seat (35) is installed on the upper end surface of the bending machine frame (1), and a mounting plate (36) is installed on the top surface of the mounting seat (35).

9. The deflection compensation device for the hydraulic lower worktable of a bending machine according to claim 8, characterized in that: The front and rear surfaces of the mounting plate (36) are both mounted with connection blocks (37), and the front surface of the connection block (37) is mounted with a measuring angle ruler (38).

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