Clamping device for machining of open plate shell structures

Abstract

The application discloses a clamping device for open plate shell structure machining, which comprises right-handed screws and left-handed screws which are detachably connected, the right-handed screws are respectively provided with connecting block a and connecting block b at left and right ends, the left-handed screws are respectively connected with connecting block d and connecting block c at left and right ends, the right clamping arms and the left clamping arms are distributed at the two sides of the right-handed screws, one end of the right clamping arms and the left clamping arms is rotationally connected with the connecting block c, two connecting rods c are rotationally connected on the connecting block d, the other ends of the two connecting rods c are respectively rotationally connected on the right clamping arms and the left clamping arms, the right clamping arms and the left clamping arms are respectively provided with right supporting blocks and left supporting blocks between the right-handed screws, the right supporting blocks, the left supporting blocks, the connecting block a and the connecting block b form a quadrilateral connecting rod mechanism through connecting rods. The application solves the problem that the stress produced during welding is completely released to cause serious workpiece deformation in the process of taking out the reinforcing rib in the prior art.

Description

Technical Field

[0001] This invention belongs to the technical field of plate and shell structure processing equipment, and relates to a clamping device for processing open plate and shell structure components. Background Technology

[0002] Currently, many large parts in mechanical products feature an open-plate design. However, this structure, due to the lack of effective restriction on the plate's degrees of freedom during machining, generates severe vibration. The workpiece itself vibrates, preventing the cutting tool from receiving a stable reaction force for continuous cutting. During machining, the tool wears rapidly and is prone to chipping. The surface quality and dimensional accuracy of the workpiece are completely out of control, and machining efficiency drops drastically. If this continues for an extended period, the workpiece may shift, threatening its scrap value. Solving the machining challenges of such parts is urgently needed.

[0003] Due to their inherent structural rigidity, open-plate shell structures cannot be subjected to excessive force during clamping to restrict their degrees of freedom in various directions. Excessive clamping force can easily deform the workpiece; insufficient clamping force can lead to displacement during machining. Currently, the common method for machining large open-plate shell components is to weld reinforcing ribs before machining. While this method significantly improves machining stability, removing the reinforcing ribs after machining completely releases the stress generated during welding, resulting in severe and uncontrollable workpiece deformation. Therefore, solving the machining challenges of such parts is urgent. A tooling solution is needed that can effectively enhance workpiece machining stability, provide controllable stress release after removal, and not affect machining accuracy. Summary of the Invention

[0004] The purpose of this invention is to provide a clamping device for processing open plate shell structure parts, which solves the problem in the prior art that the method of welding reinforcing ribs before processing leads to the complete release of stress generated during welding and severe workpiece deformation during the process of removing the reinforcing ribs.

[0005] The technical solution adopted in this invention is a clamping device for processing open plate shell structure components, including a right-hand screw and a left-hand screw detachably connected as a whole. The ends of the right-hand screw away from and near the left-hand screw are respectively connected to connecting block a and connecting block b. The ends of the left-hand screw away from and near the right-hand screw are respectively connected to connecting block c and connecting block d. It also includes a right clamping arm and a left clamping arm symmetrically distributed on both sides of the right-hand screw. The ends of the right clamping arm and the left clamping arm near the connecting block c extend to the connecting block c and are rotatably connected to the connecting block c. Connecting rods c are rotatably connected to both sides of the connecting block d corresponding to the right-hand screw and the left-hand screw. The other side of the connecting rod c is rotatably connected to the right clamping arm and the left clamping arm on the corresponding side. A right support block and a left support block are respectively provided between the right-hand screw and the right clamping arm and the left clamping arm. The right support block and the left support block are rotatably connected to the connecting block a and the connecting block b through the connecting rod.

[0006] The invention is further characterized in that,

[0007] It also includes a rotary worktable, on which a support rod is installed. The other end of the support rod is fixedly connected to the connection point of the right-hand screw and the left-hand screw. Multiple T-slots are evenly arranged on the rotary worktable. The support rod is vertically arranged and perpendicular to the working plane of the rotary worktable. A T-block that mates with the T-slot is provided at the lower end of the support rod. The rotary worktable and the support rod are slidably connected through the T-block and the T-slot.

[0008] A handle is provided at the end of the left-hand screw away from the right-hand screw.

[0009] The top of the strut is fixedly connected to a semi-circular clamp a, and also includes a semi-circular clamp b. The connection between the right-hand screw and the left-hand screw is fixed inside the clamp after the semi-circular clamp a and the semi-circular clamp b are connected by bolts.

[0010] Both the right-hand screw and the left-hand screw are horizontally arranged. The right-hand screw has an outer sleeve near the left-hand screw end, and the left-hand screw has an inner sleeve near the right-hand screw end. The inner sleeve extends into the outer sleeve and is connected to the outer sleeve by a connecting pin.

[0011] A right-hand screw passes through connecting block a and is connected to connecting block a by a right-hand thread. Connecting block b has an inner hole. The position where the right-hand screw and connecting block b are connected is set as an optical axis. The right-hand screw extends into the inner hole of connecting block b and can rotate within the inner hole of connecting block b. An axial limiting boss a of connecting block b is provided at the end of the right-hand screw near the left-hand screw.

[0012] A left-handed screw passes through the connecting block d and is connected to the connecting block d by a left-handed thread. The connecting block c has an inner hole. The position where the left-handed screw and the connecting block c are connected is set as an optical axis. The left-handed screw extends into the inner hole of the connecting block c and can rotate within the inner hole of the connecting block c. An axial limiting boss b of the connecting block c is provided at the end of the left-handed screw away from the right-handed screw.

[0013] The right support block and the left support block are respectively set between the right-hand screw and the right clamping arm, and between the right-hand screw and the left clamping arm. Connecting block a is rotatably connected to both sides of the right support block and the left support block, and the other end of connecting rod a is rotatably connected to the right-hand screw or the right clamping arm on the corresponding side. Connecting block b is rotatably connected to both sides of the right support block and the left support block, and the other end of connecting rod b is rotatably connected to the right-hand screw or the right clamping arm on the corresponding side.

[0014] Linkage b and link a are rotatably connected to the right support block, left support block, connecting block a and connecting block b respectively via pins; link c is rotatably connected to the right clamping arm, left clamping arm and connecting block d via pins; the right clamping arm, left clamping arm and connecting block c are rotatably connected via pins.

[0015] The connecting rods b or a on the upper and lower sides of the right support block, left support block, connecting block a, and connecting block b are arranged symmetrically from top to bottom. The connecting rods b or a on the upper and lower sides of the connecting block a and connecting block b are arranged symmetrically from left to right. Connecting rods c are provided at the positions of the right clamping arm and the left clamping arm on the upper and lower sides of the connecting block d, and the connecting rods c on the upper and lower sides are arranged symmetrically.

[0016] It also includes a fixing device, which includes a fixing shaft and a pressure block. The fixing shaft is fitted with a T-shaped slider with a T-slot at its lower end. The fixing shaft and the rotary table are slidably connected through the T-slot and the T-shaped slider. The upper end of the fixing shaft is threaded, and the pressure block is provided with a sliding groove. The upper end of the fixing shaft extends into the sliding groove, and a bolt is also connected to the thread of the fixing shaft.

[0017] The beneficial effects of this invention are:

[0018] This invention utilizes a main drive shaft composed of a right-hand screw and a left-hand screw, connected by a pin to transmit power. Connecting blocks a and b are installed on the right-hand screw, and connecting blocks d and c are installed on the left-hand screw. These are connected to right and left support blocks via connecting rods. The right and left support blocks open, opening the corresponding right clamping arm or clamping arm on one side, thus reliably clamping the workpiece. Since the right-hand and left-hand screws are connected by a connecting pin, after clamping the workpiece and removing the connecting pin, the two outer right and left support blocks can continue to maintain the workpiece's clamped state. The workpiece is provided with a stable clamping force during processing. Furthermore, the clamping device of this invention does not require any auxiliary processing on the workpiece, therefore, the workpiece deformation is minimal after processing is completed and the tooling is removed. To improve the stability of workpiece clamping, one end of the support rod is installed on the rotary table, and the other end is fixed to the connection between the right-hand screw and the left-hand screw by means of a clamp. This further ensures that the fixture will not loosen and can still provide effective support when the workpiece vibrates or is subjected to unilateral force during processing. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the clamping device installation structure for processing open plate shell structural parts according to the present invention;

[0020] Figure 2 yes Figure 1 Side view;

[0021] Figure 3 yes Figure 1 Top view;

[0022] Figure 4 This is a schematic diagram of the quadrilateral linkage mechanism and linkage c in the clamping device for processing open plate shell structure parts according to the present invention.

[0023] Figure 5 This is a schematic diagram showing the connection of the right-hand screw, the left-hand screw, and the support rod in the clamping device for processing open plate shell structural parts according to the present invention.

[0024] In the diagram, 1. Rotary worktable, 2. Workpiece, 3. Fixing device, 3-1. Fixed shaft, 3-2. Pressure block, 3-3. Slide groove, 3-4. Bolt, 4. Right-hand screw, 4-1. Outer sleeve, 4-2. Axial limiting boss a, 5. Connecting block a, 6. Right support block, 7. Right clamping arm, 8. Connecting rod, 8-1. Connecting rod a, 8-2. Connecting rod b, 9. Connecting block b, 10. Support rod, 10-1. T-block, 10-2. Semicircular clamp a, 10-3. Semicircular clamp b, 11. Connecting pin, 12. Connecting rod c, 13. Connecting block c, 14. Left-hand screw, 14-1. Axial limiting boss b, 14-2. Inner sleeve, 15. Connecting block d, 16. Left clamping arm, 17. Left support block, 18. T-slot, 19. Handle. Detailed Implementation

[0025] The present invention will now be described in detail with reference to the accompanying drawings and specific embodiments.

[0026] Example 1

[0027] The present invention relates to a clamping device for machining open-plate shell structural components, the structure of which is as follows: Figure 1-3 As shown, the device includes a right-hand screw 4 and a left-hand screw 14 that are detachably connected as a single unit. Connecting blocks a5 and b9 are respectively connected to the ends of the right-hand screw 4 furthest from and closest to the left-hand screw 14. Connecting blocks c13 and d15 are respectively connected to the ends of the left-hand screw 14 furthest from and closest to the right-hand screw 4. The device also includes a right clamping arm 7 and a left clamping arm 16 symmetrically distributed on both sides of the right-hand screw 4. The ends of the right clamping arms 7 and 16 closest to the connecting block c13 extend to the connecting block. At block c13, a connecting block c13 is rotatably connected to the connecting block c13. Above the connecting block d15, connecting rods c12 are rotatably connected to both sides of the right-hand screw 4 and the left-hand screw 14. The other side of the connecting rod c12 is rotatably connected to the right clamping arm 7 and the left clamping arm 16 on the corresponding side. A right support block 6 and a left support block 17 are respectively provided between the right-hand screw 4 and the right clamping arm 7 and the left clamping arm 16. The right support block 6 and the left support block 17 are rotatably connected to the connecting block a5 and the connecting block b9 through the connecting rod 8.

[0028] It also includes a rotary worktable 1, on which a support rod 10 is installed. The other end of the support rod 10 is fixedly connected to the connection point of the right-hand screw 4 and the left-hand screw 14. Multiple T-slots 18 are evenly arranged on the rotary worktable 1. The support rod 10 is vertically arranged and perpendicular to the working plane of the rotary worktable 1. A T-block 10-1 that mates with the T-slot 18 is provided at the lower end of the support rod 10. The rotary worktable 1 and the support rod 10 are slidably connected through the T-block 10-1 and the T-slot 18.

[0029] like Figure 5As shown, a semi-circular clamp a10-2 is fixedly connected to the top of the strut 10, and a semi-circular clamp b10-3 is also included. The connection between the right-hand screw 4 and the left-hand screw 14 is fixed inside the clamp after the semi-circular clamp a10-2 and the semi-circular clamp b10-3 are connected and merged by bolts.

[0030] Both the right-hand screw 4 and the left-hand screw 14 are horizontally arranged. The right-hand screw 4 has an outer sleeve 4-1 near the end of the left-hand screw 14, and the left-hand screw 14 has an inner sleeve 14-2 near the end of the right-hand screw 4. The inner sleeve 14-2 extends into the outer sleeve 4-1 and is connected to the outer sleeve 4-1 by a connecting pin 11. After removing the connecting pin 11, when the left-hand screw 14 is rotated, the inner sleeve 14-2 rotates and connects within the outer sleeve 4-1.

[0031] The right-hand screw 4 passes through the connecting block a5 and is connected to the connecting block a5 by a right-hand thread. The connecting block b9 has an inner hole. The position where the right-hand screw 4 and the connecting block b9 are connected is set as an optical axis. The right-hand screw 4 extends into the inner hole of the connecting block b9 and can rotate within the inner hole of the connecting block b9. An axial limiting boss a4-2 of the connecting block b9 is provided at the end of the right-hand screw 4 near the left-hand screw 14.

[0032] The left-hand screw 14 passes through the connecting block d15 and is connected to the connecting block d15 by a left-hand thread. The connecting block c13 has an inner hole. The position where the left-hand screw 14 and the connecting block c13 are connected is set as an optical axis. The left-hand screw 14 extends into the inner hole of the connecting block c13 and can rotate within the inner hole of the connecting block c13. An axial limiting boss b14-1 of the connecting block c13 is provided on the end of the left-hand screw 14 away from the right-hand screw 4.

[0033] like Figure 4 As shown, the right support block 6 and the left support block 17 are respectively set between the right-hand screw 4 and the right clamping arm 7, and between the right-hand screw 4 and the left clamping arm 16. The connecting block a5 is rotatably connected to both sides of the right support block 6 and the left support block 17, and the other end of the connecting rod a8-1 is rotatably connected to the right-hand screw 4 or the right clamping arm 7 on the corresponding side. The connecting block b9 is rotatably connected to both sides of the right support block 6 and the left support block 17, and the other end of the connecting rod b8-2 is rotatably connected to the right-hand screw 4 or the right clamping arm 7 on the corresponding side.

[0034] The quadrilateral linkage mechanism is provided on both the upper and lower sides of the right support block 6, the left support block 17, the connecting block a5, and the connecting block b9, and the quadrilateral linkage mechanism on the upper and lower sides is symmetrically arranged. The connecting rod c12 is provided at the positions of the right clamping arm 7 and the left clamping arm 16 on the upper and lower sides of the connecting block d15.

[0035] It also includes a fixing device 3, which includes a fixing shaft 3-1 and a pressure block 3-2. The fixing shaft 3-1 is fitted with a T-shaped slider with a T-slot 18 at its lower end. The fixing shaft 3-1 and the rotary table 1 are slidably connected through the T-slot 18 and the T-shaped slider. The upper end of the fixing shaft 3-1 is provided with a thread, and the pressure block 3-2 is provided with a sliding groove 3-3. The upper end of the fixing shaft 3-1 extends into the sliding groove 3-3. The thread of the fixing shaft 3-1 is also connected with a bolt 3-4.

[0036] The working principle of this embodiment is as follows:

[0037] Two workpieces 2 are placed parallel to each other on the rotary table 1. Then, the fixing device 3 is installed. First, the fixing shaft 3-1 of the fixing device 3 is inserted into the rotary table 1 and adjusted to a suitable position. The pressure block 3-2 is pressed onto the two workpieces 2 by tightening with bolts 3-4.

[0038] In this invention, the right support block 6 and the left support block 17 are positioned between the two workpieces 2, and the right clamping arm 7 and the left clamping arm 16 are positioned outside the corresponding workpiece 2 when the opening distance is at its maximum.

[0039] In this invention, the inner sleeve 14-2 and the outer sleeve 4-1 are provided with multiple pin holes along their nesting length direction.

[0040] When clamping workpiece 2, first connect the right-hand screw 4 and the left-hand screw 14 via the connecting pin 11. Rotate the handle on the left-hand screw 14 counterclockwise. At this time, the connecting block a5 moves away from the handle of the left-hand screw 14 through threaded transmission, and drives the right support block 6 and the left support block 17 to move closer to each other through connecting rods a8-1 and b8-2. Meanwhile, the connecting block d15 moves towards the handle 19 of the left-hand screw 14 through threaded transmission, and drives the right clamping arm 7 and the left clamping arm 16 to move away from each other through connecting rod c12, so that the distance between them gradually increases. When this distance is greater than the maximum distance between the two single plates of workpiece 2, the right clamping arm 7 and the left clamping arm 16 are on the outside of the corresponding side of workpiece 2. At this time, rotate the handle on the left-hand screw 14 clockwise, and the connecting block a5 rotates to the left through threaded transmission. The direction of the screw 14 handle moves, driving the right support block 6 and left support block 17 to open via connecting rods a8-1 and b8-2. At the same time, connecting block d15 moves in the opposite direction of the left-hand screw 14 handle via threaded transmission, driving the right clamping arm 7 and left clamping arm 16 to move closer to each other via connecting rod c12. When the right support block 6 and the right clamping arm 7 correspond to the workpiece 2 on one side respectively, that is, the right support block 6 and the left support block 17 support the inner wall of the workpiece 2 in place. At this time, remove the connecting pin 11 and rotate the handle on the left-hand screw 14 clockwise. The right clamping arm 7 and the left clamping arm 16 continue to clamp, while the right-hand screw 4 and its right support block 6 and left support block 17 remain stationary. When the workpiece clamping force is appropriate, the right-hand screw 4 and the left-hand screw 14 can be reconnected with the connecting pin 11. After completing the above steps, the support rod 10 can be installed. First, insert the T-block 10-1 of the support rod 10 into the corresponding T-slot 18 of the rotary table 1. Then, move it to the connection between the right-hand screw 4 and the left-hand screw 14, and fix it to the right-hand screw 4 with two bolts. This completes the installation of the workpiece. After processing one side of the single panel of workpiece 2, the other side of the single panel can be processed by rotating the rotary table 1 180°. After the workpiece 2 is processed, when it is necessary to remove the fixture from workpiece 2, first rotate the handle on the left-hand screw 14 counterclockwise to release the workpiece from the right support block 5 and the right clamping arm 6. Then, remove the bolts on the support rod 10 and take out the support rod 10 to complete the disassembly.

[0041] Example 2

[0042] Based on Embodiment 1, the connecting rods b8-2 or a8-1 on the upper and lower sides of the right support block 6, left support block 17, connecting block a5, and connecting block b9 are arranged symmetrically from top to bottom. The connecting rods b8-2 or a8-1 on the upper and lower sides of the connecting block a5 and connecting block b9 are arranged symmetrically from left to right. The connecting rods c12 on the upper and lower sides of the connecting block d15 are arranged symmetrically at the positions of the right clamping arm 7 and the left clamping arm 16.

[0043] Example 3

[0044] Based on Example 2, connecting rods b8-2 and a8-1 are rotatably connected to the right support block 6, the left support block 17, the connecting block a5, and the connecting block b9 via pins, respectively; connecting rod c12 is rotatably connected to the right clamping arm 7, the left clamping arm 16, and the connecting block d15 via pins; and the right clamping arm 7, the left clamping arm 16, and the connecting block c13 are rotatably connected via pins.

[0045] This invention features a simple structure, convenient operation, and applicability to various horizontal and vertical machine tools. It can accommodate workpieces with a single-plate thickness of 10mm-30mm, improving workpiece machining accuracy and surface quality. Compared with existing technologies, it has the following effects and characteristics: 1) Simple structure, easy assembly and disassembly, and applicable to workpieces within a certain size range. 2) Provides stable clamping force for the workpiece during machining, effectively enhancing workpiece machining stability. 3) Stress release is controllable after tooling removal after machining, without affecting workpiece machining accuracy and ensuring workpiece machining quality. 4) After the workpiece is clamped in place on the inner side, it can continue to be clamped on the outer side, and can reliably support it under conditions such as vibration or unilateral force. 5) Using this invention can reduce the auxiliary machining time required for workpiece clamping, improving machining efficiency.

Claims

1. A clamping device for machining open-plate shell structural components, characterized in that, It includes a right-hand screw (4) and a left-hand screw (14) that are detachably connected as a whole. The right-hand screw (4) is connected to a connecting block a (5) and a connecting block b (9) at the ends away from and near the left-hand screw (14), respectively. The left-hand screw (14) is connected to a connecting block c (13) and a connecting block d (15) at the ends away from and near the right-hand screw (4), respectively. It also includes a right clamping arm (7) and a left clamping arm (16) symmetrically distributed on both sides of the right-hand screw (4). The ends of the right clamping arm (7) and the left clamping arm (16) near the connecting block c (13) extend to the connecting block c (13). At the position of the connecting block d (15), it is rotatably connected to the connecting block c (13). The connecting block d (15) is rotatably connected to the two sides of the right-hand screw (4) and the left-hand screw (14). The other side of the connecting block c (12) is rotatably connected to the right clamping arm (7) and the left clamping arm (16) on the corresponding side. The right-hand screw (4) and the right clamping arm (7) and the left clamping arm (16) are respectively provided with a right support block (6) and a left support block (17). The right support block (6) and the left support block (17) are rotatably connected to the connecting block a (5) and the connecting block b (9) through the connecting rod (8). It also includes a rotary worktable (1), on which a support rod (10) is installed. The other end of the support rod (10) is fixedly connected to the connection point of the right-hand screw (4) and the left-hand screw (14). Multiple T-slots (18) are evenly arranged on the rotary worktable (1). The support rod (10) is vertically arranged and perpendicular to the working plane of the rotary worktable (1). The lower end of the support rod (10) is provided with a T-block (10-1) that cooperates with the T-slot (18). The rotary worktable (1) and the support rod (10) are slidably connected by the T-block (10-1) and the T-slot (18). A handle (19) is provided at the end of the left-hand screw (14) away from the right-hand screw (4). The top of the support rod (10) is fixedly connected to a semi-circular clamp a (10-2), and also includes a semi-circular clamp b (10-3). The connection between the right-hand screw (4) and the left-hand screw (14) is fixed inside the clamp after the semi-circular clamp a (10-2) and the semi-circular clamp b (10-3) are connected by bolts. Both the right-hand screw (4) and the left-hand screw (14) are horizontally arranged. The right-hand screw (4) is provided with an outer sleeve (4-1) near the end of the left-hand screw (14), and the left-hand screw (14) is provided with an inner sleeve (14-2) near the end of the right-hand screw (4). The inner sleeve (14-2) extends into the outer sleeve (4-1) and is connected to the outer sleeve (4-1) by a connecting pin (11). The right-hand screw (4) passes through the connecting block a (5) and is connected to the connecting block a (5) by a right-hand thread. The connecting block b (9) has an inner hole. The position where the right-hand screw (4) and the connecting block b (9) are connected is set as an optical axis. The right-hand screw (4) extends into the inner hole of the connecting block b (9) and can rotate within the inner hole of the connecting block b (9). The right-hand screw (4) is provided with an axial limiting boss a (4-2) of the connecting block b (9) at one end near the left-hand screw (14). The left-hand screw (14) passes through the connecting block d (15) and is connected to the connecting block d (15) by a left-hand thread. The connecting block c (13) has an inner hole. The position where the left-hand screw (14) and the connecting block c (13) are connected is set as an optical axis. The left-hand screw (14) extends into the inner hole of the connecting block c (13) and can rotate within the inner hole of the connecting block c (13). An axial limiting boss b (14-1) of the connecting block c (13) is provided at the end of the left-hand screw (14) away from the right-hand screw (4).

2. The clamping device for machining open-plate shell structural components according to claim 1, characterized in that, The right support block (6) and the left support block (17) are respectively set between the right-hand screw (4) and the right clamping arm (7) and the right-hand screw (4) and the left clamping arm (16). The connecting block a (5) is rotatably connected to both sides of the right support block (6) and the left support block (17). The other end of the connecting rod a (8-1) is rotatably connected to the right-hand screw (4) or the right clamping arm (7) on the corresponding side. The connecting block b (9) is rotatably connected to both sides of the right support block (6) and the left support block (17). The other end of the connecting rod b (8-2) is rotatably connected to the right-hand screw (4) or the right clamping arm (7) on the corresponding side.

3. The clamping device for machining open-plate shell structural components according to claim 2, characterized in that, The connecting rods b (8-2) and a (8-1) are rotatably connected to the right support block (6), the left support block (17), the connecting block a (5) and the connecting block b (9) respectively via pins; the connecting rod c (12) is rotatably connected to the right clamping arm (7), the left clamping arm (16) and the connecting block d (15) via pins; the right clamping arm (7) and the left clamping arm (16) are rotatably connected to the connecting block c (13) via pins.

4. The clamping device for machining open-plate shell structural components according to claim 3, characterized in that, The connecting rods b (8-2) or a (8-1) on the upper and lower sides of the right support block (6), left support block (17), connecting block a (5), and connecting block b (9) are arranged symmetrically in the upper and lower directions. The connecting rods b (8-2) or a (8-1) on the upper and lower sides of the connecting block a (5) and connecting block b (9) are arranged symmetrically in the left and right directions. The connecting rods c (12) on the upper and lower sides of the connecting block d (15) are arranged symmetrically at the positions of the right clamping arm (7) and the left clamping arm (16).

5. The clamping device for machining open-plate shell structural components according to claim 4, characterized in that, It also includes a fixing device (3), which includes a fixing shaft (3-1) and a pressure block (3-2). The lower end of the fixing shaft (3-1) is provided with a T-shaped slider that cooperates with the T-slot (18). The fixing shaft (3-1) and the rotary table (1) are slidably connected through the T-slot (18) and the T-shaped slider. The upper end of the fixing shaft (3-1) is provided with a thread. The pressure block (3-2) is provided with a sliding groove (3-3). The upper end of the fixing shaft (3-1) extends into the sliding groove (3-3). The thread of the fixing shaft (3-1) is also connected with a bolt (3-4).

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