Synchronizing device and method capable of adjusting unbalance loading amount

Abstract

The invention discloses a synchronous device and mode capable of adjusting unbalance loading quantity, and the device structurally comprises a limiting swing arm which is installed through a rotating shaft, and two swing wheels which are arranged on the limiting swing arm compared with a traditional structural form, the driven wheel sets are symmetrically distributed on the two sides of the rotating shaft, the adjusting plates are arranged on the sides, back to the driven wheels, of the limiting swing arms, and the synchronous belts are connected with all the wheels and are tensioned through the tensioning wheels to keep tensioning force. On the basis of an existing structure of a pure electric bending machine, a traditional direct synchronous belt transmission mode of a synchronous belt is changed, one synchronous belt, a plurality of positioning wheels and a group of tensioning wheels are linked with two servo motors and two main shaft lead screws for transmission, the two main shaft lead screws can synchronously move up and down, the two servo motors can be made to conduct micro correction, and therefore the synchronous transmission of the two servo motors is achieved. And the main shaft screw rod breakage or other serious mechanical faults of the main shaft caused by overlarge deviation of the two main shaft screw rods are limited.

Description

Technical Field

[0001] The invention belongs to the technical field of dual servo transmission, and in particular relates to a synchronization device and method with adjustable eccentric load. Background Art

[0002] Servo motors are often used to drive ball screws in forging machinery. For pure electric bending machines, the double screws under the slider are driven to run synchronously. No matter it is a debugging error or normal use, there should not be excessive eccentric load, otherwise the spindle screw will break or more serious mechanical accidents will occur. Due to the requirements of the bending process or the workpiece, sometimes in order to ensure the accuracy of the angles on both sides of the bending workpiece, the screws on both sides of the two bending machines are slightly adjusted to make up for the error of the workpiece. Therefore, the two screw shafts cannot be completely synchronized, and it is difficult to ensure the eccentricity on both sides of the bending machine, and no mechanical failures will occur.

[0003] At present, the existing transmission and control method is that two servos and two spindle screws use two identical synchronous belts to directly transmit torque to the large and small pulleys (for example, CN201921853167.7), and then the running position of the slider is corrected by the grating ruler, such as Figure 7 and Figure 8 .

[0004] Y1 servo motor 1.1 drives Y1 small synchronous pulley 2.1 to rotate, and transmits power to Y1 large synchronous wheel 5.1 through Y1 synchronous belt 3.1. Y1 spindle screw 4.1 is connected to Y1 large synchronous wheel 5.1. With the positive and negative rotation of Y1 large synchronous wheel 5.1, Y1 spindle screw 4.1 drives slider 8 to move up and down. Since both ends of slider 8 are connected to Y1 spindle screw 4.1 and Y2 spindle screw 4.2 respectively, when slider 8 moves up and down, two servo motors (Y1 servo motor 1.1 and Y2 servo motor 1.2) must run synchronously, otherwise slider 8 will tilt to a certain extent, and Y1 spindle screw 4.1, Y2 spindle screw 4.2 and Y1 linear rail 7.1, Y2 linear rail 7.2 will have serious mechanical failure. When the slider moves up and down, the current position can be reflected to the CNC control system through the grating ruler 6.1 (6.2) installed at both ends, so as to adjust the error data on both sides for correction. However, system control may also result in misoperation or signal errors, and it is difficult to completely prevent the slider from being out of sync. Since the servo motor has a large torque, once out of sync occurs, the spindle screw will break or other serious mechanical failures will occur. Summary of the invention

[0005] The purpose of the present invention is to change the traditional direct synchronous belt transmission mode of the synchronous belt on the basis of the existing structure of the pure electric bending machine, and to link the two servo motors and the two main shaft screws through the same synchronous belt and multiple slave wheels and a group of tensioning wheels, so that the two main shaft screws can run up and down synchronously, and the two servo motors can make slight corrections, thereby limiting the large deviation of the two main shaft screws, which may lead to the breakage of the main shaft screw or other serious mechanical failures.

[0006] In order to solve the above technical problems, the inventors have obtained the technical solution of the present invention through practice and summary. The present invention adopts the following technical solution:

[0007] A synchronous device with adjustable eccentric load, comprising servo motor 1, servo motor 2, spindle screw 1, spindle screw 2, small synchronous wheel 1, small synchronous wheel 2, large synchronous wheel 1, large synchronous wheel 2, grating ruler 1, grating ruler 2, linear guide rail 1, linear guide rail 2, and further comprising:

[0008] A limit swing arm, which is installed between the large synchronous wheel 1 and the large synchronous wheel 2 via the rotating shaft, and two swing wheels are symmetrically installed on the limit swing arm with the rotating shaft center;

[0009] The driven wheel group includes two sets, which are symmetrically distributed on both sides of the rotating shaft;

[0010] An adjustment plate, which is arranged on a side of the limit swing arm facing away from the driven wheel and is used to control the swing range of the limit swing arm;

[0011] The synchronous belt and the synchronous belt hoop are arranged on the small synchronous wheel 1, the small synchronous wheel 2, the large synchronous wheel 1, the large synchronous wheel 2, the driven wheel group, and the swing wheel. The rotation directions of the small synchronous wheel 1 and the small synchronous wheel 2 are consistent, and the synchronous belt is tensioned by the tensioning wheel to maintain the tension.

[0012] In the solution, an adjustment part is provided on the limit swing arm, and the positions of the adjustment part and the adjustment plate correspond.

[0013] In the solution, the adjustment portion is an inwardly recessed V-shaped structure, and the adjustment plate is a V-shaped structure.

[0014] In the solution, anti-collision pads are provided at both ends of the adjustment plate, and the anti-collision pads are used to buffer the collision between the limit swing arm and the adjustment plate.

[0015] In the solution, each group of the driven wheel set includes two driven wheels, and the two driven wheels are distributed on both sides of the swing wheel.

[0016] In the solution, a positioning pin is installed on the limit swing arm, and the positioning pin is used to limit the deflection angle of the limit swing arm centered on the rotation axis.

[0017] In the scheme, the positioning pin includes a sleeve fixedly arranged on the limit swing arm, an electromagnet, a spring body and a latch are installed in the sleeve, the latch is installed in the sleeve via the spring body, and the electromagnet adsorbs the latch after being energized;

[0018] A limit adapter opening is arranged in the lower area of ​​the limit swing arm, the limit adapter opening is adapted to the latch, and a plurality of limit adapter openings are evenly distributed around the rotating shaft.

[0019] In the scheme, an adjusting member is arranged on the rear side of the adjusting plate, and the adjusting member includes a guide groove arranged below the adjusting plate, a sliding block slidingly fitted in the guide groove, and an adjusting cylinder arranged parallel to the guide groove, and the adjusting cylinder is used to adjust the front and rear position of the adjusting plate.

[0020] A method for using a synchronization device with adjustable eccentric load, comprising:

[0021] When bending normally:

[0022] The latch is inserted into the limit adapter opening just below the latch under the action of the spring body;

[0023] When the slider bends downward, servo motor 1 and servo motor 2 rotate synchronously in clockwise direction. At this time, the rotation positioning accuracy of large synchronous wheel 1 is controlled by servo motor 1 to control the bending positioning. When rotating clockwise, the synchronous belt of servo motor 1 and large synchronous wheel 1 is tightened and directly transmits torque.

[0024] When the slider is reset upward, servo motor 1 and servo motor 2 rotate counterclockwise synchronously, the torque shaft of servo motor 1 is driven to large synchronous wheel 2 through the synchronous belt, and the torque shaft of servo motor 2 is driven to large synchronous wheel 1 through the synchronous belt;

[0025] When the right side needs to bend with an offset load:

[0026] At this time, the positioning pin and the limit adapter are in a disengaged state, the servo motor 2 rotates a certain angle more than the servo motor 1, the limit swing arm swings a certain angle around the rotating axis to one side of the servo motor 1, the positioning pin locks the limit swing arm at this angle state, and the torque force of the servo motor 2 is transmitted to the spindle screw 1 through the synchronous belt, and the anti-eccentric load bending force is increased;

[0027] When the left side needs to bend with an offset load:

[0028] At this time, the positioning pin and the limit adapter are in a disengaged state, and the servo motor 1 rotates a certain angle more than the servo motor 2. The limit swing arm swings a certain angle around the rotating axis to one side of the servo motor 2. The positioning pin locks the limit swing arm at this angle state, and transmits the torque force of the servo motor 1 to the spindle screw 2 through the synchronous belt, thereby increasing the anti-eccentric load bending force.

[0029] Compared with the prior art, the present invention has the following beneficial effects:

[0030] Since the working pressure of the bending machine is a unidirectional force (i.e. the servo motor drives the screw rod to rotate, causing the slider to pressurize downward), the synchronous wheel and synchronous belt are required to have precision in one direction, such as Figure 1 As shown, servo motor 1 and servo motor 2 rotate clockwise, and the small synchronous wheel 1 and the small synchronous wheel 2 on the two servo motors drive the synchronous belt to rotate clockwise, and also drive the large synchronous wheel 1 and the large synchronous wheel and the large synchronous wheel, thereby driving the spindle lead screw 1 and the spindle lead screw 2 to rotate and realize the downward movement of the slider.

[0031] For example, when Y1 on the right side needs to bend with an offset load, the servo motor of Y2 needs to rotate a certain amount more than the servo motor of Y1. The offset load is controlled by the limit swing arm, which swings around the rotation axis. The swing range is adjusted by the adjustment plate. An anti-collision pad is installed on the adjustment plate to buffer the collision between the limit swing arm and the adjustment plate. The tension of the synchronous belt is controlled by the tensioning pulley to maintain the tension of the synchronous belt.

[0032] In the traditional transmission method, the downward bending force of the Y1 slider is only the transmission torque of a servo motor on the Y1 side, while the torque of the servo motor on the Y2 side cannot be transmitted to the large synchronous wheel of Y1 and can only rotate following the downward movement of Y1.

[0033] The transmission method of the present invention can operate normally by adapting the positioning pin and the limiting adapter on the limiting swing arm, so that the torque of the two servo motors can rotate the two screws through a synchronous belt to drive the slider to bend downward. When unilateral load bending is required, the positioning pin and the limiting adapter are released, and the rotation angle difference of the two servo motors is used to realize the deflection of the limiting swing arm to a certain angle, and then the torque on the side with a large rotation angle is transmitted to the spindle screw on the side with a small rotation angle, so as to increase the anti-biased load bending force on this side. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 It is a top view of the overall structure of the present invention;

[0035] Figure 2 It is a front view of the overall structure of the present invention;

[0036] Figure 3 This is the working condition diagram of the present invention when Y1 is the eccentric load bending side;

[0037] Figure 4 A top view of the structure in which the adjustment plate of the present invention is adjustable;

[0038] Figure 5 It is a schematic diagram of the overall structure of the position-limiting swing arm of the present invention;

[0039] Figure 6 for Figure 5 Structural relationship diagram of the middle limit swing arm and positioning pin;

[0040] Figure 7 A top view of a conventional synchronization device;

[0041] Figure 8 The figure is a front view of a conventional synchronization device.

[0042] In the figure:

[0043] 1.1, Y1 servo motor; 1.2, Y2 servo motor; 2.1, Y1 small synchronous wheel; 2.2, Y2 small synchronous wheel; 3.1, synchronous belt one; 3.2, synchronous belt one; 4.1, Y1 spindle screw, 4.2, Y2 spindle screw; 5.1, Y1 large synchronous wheel; 5.2, Y2 large synchronous wheel; 6.1, Y1 grating ruler; 6.2-Y2 grating ruler; 7.1-Y1 ​​linear guide; 7.2, Y2 linear guide; 8, slider;

[0044] 1.3, servo motor one; 1.4, servo motor two; 2.3, small synchronous wheel one; 2.4, small synchronous wheel two; 3.3, synchronous belt; 4.3, spindle screw one; 4.4, spindle screw two; 5.3, large synchronous wheel one; 5.4, large synchronous wheel two; 6.3, grating ruler one; 6.4, grating ruler two; 7.3, linear guide rail one; 7.4, linear guide rail two; 8, slider; 9, tensioning wheel; 10, limit swing arm; 11, adjustment plate; 12, anti-collision pad; 13, driven wheel; 14, swing wheel; 15, rotating shaft; 16, positioning pin; 161,; 162,; 163,;. DETAILED DESCRIPTION

[0045] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0046] In the description of the present invention, it is necessary to understand that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0047] like Figures 1 to 3As shown, a synchronization device with adjustable eccentric load includes a servo motor 1.3, a servo motor 1.4, a spindle screw 4.3, a spindle screw 4.4, a small synchronous wheel 2.3, a small synchronous wheel 2.4, a large synchronous wheel 5.3, a large synchronous wheel 5.4, a grating ruler 6.3, a grating ruler 6.4, a linear guide 7.3, and a linear guide 7.4.

[0048] Also includes:

[0049] The limit swing arm 10 is installed between the large synchronous wheel 1 5.3 and the large synchronous wheel 2 5.4 via the rotating shaft 15. Two swing wheels 14 are symmetrically installed on the limit swing arm 10 with the rotating shaft 15 as the center.

[0050] A driven wheel group 13, wherein two driven wheels 13 are provided and symmetrically distributed on both sides of the rotating shaft 15;

[0051] An adjustment plate 11, which is arranged on a side of the limit swing arm 10 facing away from the driven wheel 13, and is used to control the swing range of the limit swing arm 10;

[0052] The synchronous belt 3.3 is hooped on the small synchronous wheel 1 2.3, the small synchronous wheel 2.4, the large synchronous wheel 1 5.3, the large synchronous wheel 2 5.4, the driven wheel 13 group, and the swing wheel 14. The small synchronous wheel 1 2.3 and the small synchronous wheel 2 2.4 rotate in the same direction, and the synchronous belt 3.3 is tensioned by the tensioning wheel 9 to maintain the tension.

[0053] The position-limiting swing arm 10 is provided with an adjusting portion, and the position of the adjusting portion corresponds to that of the regulating plate 11 .

[0054] The adjustment portion is an inwardly recessed V-shaped structure, and the adjustment plate 11 is a V-shaped structure.

[0055] Anti-collision pads 12 are provided at both ends of the adjustment plate 11 , and the anti-collision pads 12 are used to buffer the collision between the limit swing arm 10 and the adjustment plate 11 .

[0056] Each group of driven wheels 13 includes two driven wheels 13 , and the two driven wheels 13 are distributed on both sides of the swing wheel 14 . The four driven wheels 13 are A, B, C, and D wheels from right to left.

[0057] Four auxiliary wheels are arranged on the side of the servo motor 2 4.4, namely, wheel A1, wheel A2, wheel A3 and wheel A4.

[0058] The inner side of the synchronous belt 3.3 is in close contact with the outer sides of the small synchronous wheel 2.3, the large synchronous wheel 5.3, the B1 wheel, the C wheel, the D wheel, the A1 wheel, the A2 wheel, the small synchronous wheel 2.4, and the large synchronous wheel 2 5.4. The outer side of the synchronous belt 3.3 is in close contact with the outer sides of the A wheel, the B wheel, the A3 wheel, the A4 wheel, and the B2 wheel.

[0059] A positioning pin 16 is installed on the position-limiting swing arm 10 , and the positioning pin 16 is used to limit the deflection angle of the position-limiting swing arm 10 centered on the rotation axis 15 .

[0060] During normal operation, the positioning pin 16 is inserted into the frame at the lower part of the limit swing arm 10, so that the left and right sides of the rotating shaft 15 are symmetrically distributed, the servo motor 1 4.3 and the servo motor 2 4.4 realize synchronous clockwise movement through the synchronous belt 3.3, the large synchronous wheel and the small synchronous wheel, the slider 8 moves downward for bending operation, the servo motor 1 4.3 and the servo motor 2 4.4 realize synchronous counterclockwise movement through the synchronous belt 3.3, the large synchronous wheel and the small synchronous wheel, and the slider 8 moves upward for reset.

[0061] When the slider 8 is bending downward, the servo motor 1.3 and the servo motor 2 1.4 rotate synchronously in the clockwise direction. At this time, the rotation positioning accuracy of the large synchronous wheel 4.3 is controlled by the servo motor 1.3 of Y1 (when rotating clockwise, the synchronous belt of the servo motor 1.3 and the large synchronous wheel 5.3 is tight, directly transmitting the torque). When the two servo motors rotate in the opposite direction (counterclockwise), the torque shaft rotated by the servo motor 1.3 of Y1 is transmitted to the large synchronous wheel 2 5.4 of Y2 through the synchronous belt 3.3, and the torque shaft rotated by the servo motor 2 1.4 of Y2 is transmitted to the large synchronous wheel 1 5.3 of Y1 through the synchronous belt 3.3. For the operation of the bending machine, only the downward bending accuracy is required. For the upward return, there is no accuracy requirement, as long as the action is coordinated.

[0062] When unilateral loading is required, the positioning pin 16 only needs to release the horizontal deflection restriction on the limit swing arm 10. When normal bending operation is performed, the positioning pin 16 is reinserted to restrict the two swing wheels 14 on the limit swing arm 10 to be symmetrically distributed on the left and right.

[0063] In the synchronization device, if Figure 5 , 6 As shown, the positioning pin 16 includes a sleeve 161 fixedly arranged on the limit swing arm 10, and an electromagnet 162, a spring body 163 and a latch 164 are installed in the sleeve 161. The latch 164 is installed in the sleeve 161 through the spring body 163. The electromagnet 162 attracts the latch 164 after being energized;

[0064] A limit adapter opening is provided in the lower area of ​​the limit swing arm 10 , and the limit adapter opening is adapted to the latch 164 . There are a plurality of limit adapter openings evenly distributed around the rotating shaft 15 .

[0065] When unilateral eccentric loading bending is required, the electromagnet 162 is energized to disengage the suction pin 164 from the limit adapter, and the horizontal deflection restriction of the limit swing arm 10 is released. The servo motor on the other side will rotate a certain angle more than the servo motor on that side (generally about one eighth to one quarter of a turn, and the specific eccentric loading amount depends on the actual situation on site).

[0066] In the synchronization device, if Figure 4 As shown, an adjusting member is provided on the rear side of the adjusting plate 11, and the adjusting member includes a guide groove 111 provided below the adjusting plate 11, a sliding block 113 slidably fitted in the guide groove 111, and an adjusting cylinder 112 provided parallel to the guide groove 111, and the adjusting cylinder 112 is used to adjust the front and rear position of the adjusting plate 11.

[0067] A method for using a synchronization device with adjustable eccentric load, comprising:

[0068] When bending normally:

[0069] The latch 164 is inserted into the limit adapter opening directly below the latch 164 under the action of the spring body 163;

[0070] When the slider is bent downward, the servo motor 1.3 and the servo motor 2 1.4 rotate synchronously in the clockwise direction. At this time, the rotation positioning accuracy of the large synchronous wheel 5.3 is controlled by the servo motor 1.3 to control the bending positioning. When rotating clockwise, the synchronous belt 3.3 of the servo motor 1.3 and the large synchronous wheel 5.3 is a tight direct transmission torque;

[0071] When the slider is reset upward, the servo motor 1.3 and the servo motor 2 1.4 rotate counterclockwise synchronously, and the torque shaft rotated by the servo motor 1.3 is transmitted to the large synchronous wheel 2 5.4 through the synchronous belt 3.3, and the torque shaft rotated by the servo motor 2 1.4 is transmitted to the large synchronous wheel 1 5.3 through the synchronous belt 3.3;

[0072] When the right side needs to bend with an offset load:

[0073] At this time, the positioning pin 16 and the limit adapter are in a disengaged state, the servo motor 2 1.4 rotates a certain angle more than the servo motor 1.3, the limit swing arm 10 swings a certain angle around the rotating shaft 15 to one side of the servo motor 1.3, the positioning pin 16 locks the limit swing arm 10 at this angle state, and transmits the torque force of the servo motor 2 1.4 to the spindle screw 1 4.3 through the synchronous belt 3.3, and the anti-eccentric load bending force is increased;

[0074] When the left side needs to bend with an offset load:

[0075] At this time, the positioning pin 16 and the limit adapter are in a disengaged state, the servo motor 1.3 rotates a certain angle more than the servo motor 1.4, the limit swing arm 10 swings a certain angle around the rotating shaft 15 to one side of the servo motor 1.4, the positioning pin 16 locks the limit swing arm 10 at this angle state, and transmits the torque force of the servo motor 1.3 to the spindle screw 2 4.4 through the synchronous belt 3.3, thereby increasing the anti-eccentric load bending force.

[0076] The above is only a preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. The replacement may be a replacement of a part of the structure, device, method step, or a complete technical solution. Any equivalent replacement or change according to the technical solution and the inventive concept of the present invention shall be covered within the protection scope of the present invention.

Claims

1. A synchronous device with adjustable eccentric load, comprising a servo motor 1 (1.3), a servo motor 2 (1.4), a spindle screw 1 (4.3), a spindle screw 2 (4.4), a small synchronous wheel 1 (2.3), a small synchronous wheel 2 (2.4), a large synchronous wheel 1 (5.3), a large synchronous wheel 2 (5.4), a grating ruler 1 (6.3), a grating ruler 2 (6.4), a linear guide rail 1 (7.3), and a linear guide rail 2 (7.4), characterized in that: Also includes: A limit swing arm (10), the limit swing arm (10) is installed between the large synchronous wheel 1 (5.3) and the large synchronous wheel 2 (5.4) via a rotating shaft (15), and two swing wheels (14) are symmetrically installed on the limit swing arm (10) with the center of the rotating shaft (15); A driven wheel (13) group, wherein two driven wheel (13) groups are provided and symmetrically distributed on both sides of the rotating shaft (15); An adjustment plate (11), the adjustment plate (11) is arranged on a side of the position-limiting swing arm (10) facing away from the driven wheel (13), and is used to control the swing range of the position-limiting swing arm (10); A synchronous belt (3.3) is provided on a small synchronous wheel (2.3), a small synchronous wheel (2.4), a large synchronous wheel (5.3), a large synchronous wheel (5.4), a driven wheel (13) group, and a swing wheel (14). The small synchronous wheel (2.3) and the small synchronous wheel (2.4) rotate in the same direction, and the synchronous belt (3.3) is tensioned by a tensioning wheel (9) to maintain tension.

2. A synchronization device with adjustable eccentric load according to claim 1, characterized in that: The position-limiting swing arm (10) is provided with an adjustment portion, and the positions of the adjustment portion and the adjustment plate (11) correspond.

3. A synchronization device with adjustable eccentric load according to claim 2, characterized in that: The adjustment portion is an inwardly recessed V-shaped structure, and the adjustment plate (11) is a V-shaped structure.

4. A synchronization device with adjustable eccentric load according to claim 1, characterized in that: Anti-collision pads (12) are provided at both ends of the adjustment plate (11), and the anti-collision pads (12) are used to buffer the collision between the limit swing arm (10) and the adjustment plate (11).

5. A synchronization device with adjustable eccentric load according to claim 1, characterized in that: Each group of driven wheels (13) comprises two driven wheels (13), and the two driven wheels (13) are distributed on both sides of the swing wheel (14).

6. A synchronous device with adjustable eccentric load according to claim 1, characterized in that: A positioning pin (16) is installed on the position-limiting swing arm (10), and the positioning pin (16) is used to limit the deflection angle of the position-limiting swing arm (10) centered on the rotation axis (15).

7. A synchronization device with adjustable eccentric load according to claim 6, characterized in that: The positioning pin (16) comprises a sleeve (161) fixedly arranged on the limit swing arm (10), an electromagnet (162), a spring body (163) and a latch (164) are installed in the sleeve (161), the latch (164) is installed in the sleeve (161) via the spring body (163), and the electromagnet (162) adsorbs the latch (164) when energized; A limit adapter opening is arranged in the lower area of ​​the limit swing arm (10), the limit adapter opening is adapted to the latch pin (164), and a plurality of limit adapter openings are evenly distributed in the circumferential direction around the rotation axis (15).

8. A synchronization device with adjustable eccentric load according to claim 1, characterized in that: An adjusting member is arranged at the rear side of the adjusting plate (11), the adjusting member comprising a guide groove (111) arranged below the adjusting plate (11), a sliding block (113) slidably fitted in the guide groove (111), and an adjusting cylinder (112) arranged parallel to the guide groove (111), the adjusting cylinder (112) being used to adjust the front and rear position of the adjusting plate (111).

9. A method for using the synchronization device with adjustable eccentric load as claimed in claim 1, characterized in that: include: When bending normally: The latch (164) is inserted into the limit adapter opening directly below the latch (164) under the action of the spring body (163); When the slider is bent downward, the servo motor 1 (1.3) and the servo motor 2 (1.4) rotate synchronously in the clockwise direction. At this time, the rotation positioning accuracy of the large synchronous wheel 1 (5.3) is controlled by the servo motor 1 (1.3) to control the bending positioning. When rotating clockwise, the synchronous belt (3.3) of the servo motor 1 (1.3) and the large synchronous wheel 1 (5.3) is a tight direct transmission torque; When the slider is reset upward, the servo motor 1 (1.3) and the servo motor 2 (1.4) rotate counterclockwise synchronously, and the torque shaft rotated by the servo motor 1 (1.3) is transmitted to the large synchronous wheel 2 (5.4) through the synchronous belt (3.3), and the torque shaft rotated by the servo motor 2 (1.4) is transmitted to the large synchronous wheel 1 (5.3) through the synchronous belt (3.3); When the right side needs to bend with an offset load: The servo motor 2 (1.4) rotates a certain angle more than the servo motor 1 (1.3), the limit swing arm (10) swings a certain angle around the rotation axis (15) to one side of the servo motor 1 (1.3), the positioning pin (16) locks the limit swing arm (10) at this angle state, and the torque force of the servo motor 2 (1.4) is transmitted to the main shaft screw 1 (4.3) through the synchronous belt (3.3), thereby increasing the anti-eccentric load bending force; When the left side needs to bend with an offset load: The servo motor 1 (1.3) rotates a certain angle more than the servo motor 2 (1.4), the limit swing arm (10) swings a certain angle around the rotation axis (15) to one side of the servo motor 2 (1.4), the positioning pin (16) locks the limit swing arm (10) at this angle state, and the torque force of the servo motor 1 (1.3) is transmitted to the main shaft screw 2 (4.4) through the synchronous belt (3.3), thereby increasing the anti-eccentric load bending force.

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