Clamping device for machining open type plate shell structural part

Abstract

The clamping device comprises a right-handed screw rod and a left-handed screw rod which are detachably connected, a connecting block a and a connecting block b are arranged at the left end and the right end of the right-handed screw rod respectively, and a connecting block d and a connecting block c are arranged at the left end and the right end of the left-handed screw rod respectively. The right clamping arm and the left clamping arm are distributed on the two sides of the right-handed rotation screw rod, one end of the right clamping arm and one end of the left clamping arm are rotationally connected with a connecting block c, two connecting rods c are rotationally connected to the connecting block d, and the other ends of the two connecting rods c are rotationally connected to the right clamping arm and the left clamping arm correspondingly; a right supporting block and a left supporting block are further arranged between the right clamping arm and the right-handed screw and between the left clamping arm and the right-handed screw. The right supporting block, the left supporting block, the connecting block a and the connecting block b are connected through connecting rods to form a quadrilateral connecting rod mechanism. The problem that in the prior art, in the process of taking out the reinforcing lacing wire, stress generated during welding is completely released, and a workpiece deforms seriously is solved.

Description

Technical Field

[0001] The present invention belongs to the technical field of processing devices for plate and shell structural parts, and relates to a clamping device for processing open plate and shell structural parts. Background Art

[0002] At present, many large parts in mechanical products have the design of open single plates. However, during the machining process of this structure, due to the ineffective restriction of the degrees of freedom of the single plate, there will be a severe tool chatter phenomenon, and the workpiece itself vibrates, resulting in the inability of the tool to obtain a stable reaction force for continuous cutting. During the machining process, the tool wears rapidly and there will be a phenomenon of chipping at any time. The surface quality and dimensional accuracy of the workpiece are completely out of control, and the machining efficiency drops sharply. If it lasts for a long time, the workpiece will displace and be at risk of being scrapped at any time. Solving the machining problems of such parts is extremely urgent.

[0003] Due to the reason of its own structural rigidity, the open plate and shell structural parts cannot use too much force to restrict the degrees of freedom in all directions during the clamping process. If the clamping force is too large, the workpiece is prone to deformation; if the clamping force is too small, the workpiece is prone to displacement during the machining process. At present, the general method for machining large open plate and shell parts is to weld reinforcing ribs before machining. Although this method can improve the machining stability of the workpiece to a great extent, the process of removing the reinforcing ribs after machining will cause the stress generated during welding to be completely released, and the deformation of the workpiece is seriously uncontrollable. Therefore, it is extremely urgent to solve the machining problems of such parts, and a tooling is needed that can effectively enhance the machining stability of the workpiece and whose stress release is controllable after removal without affecting the machining accuracy of the workpiece. Summary of the Invention

[0004] The purpose of the present invention is to provide a clamping device for processing open plate and shell structural parts, which solves the problem that in the prior art, when using the method of welding reinforcing ribs before machining, the stress generated during welding is completely released during the process of removing the reinforcing ribs, resulting in serious deformation of the workpiece.

[0005] The technical solution adopted by the present invention is a clamping device for processing open shell structural parts, which includes a right-handed screw rod and a left-handed screw rod detachably connected as a whole. One end of the right-handed screw rod far from and close to the left-handed screw rod is respectively connected with a connecting block a and a connecting block b. One end of the left-handed screw rod far from and close to the right-handed screw rod is respectively connected with a connecting block c and a connecting block d. It also includes a right clamping arm and a left clamping arm symmetrically distributed on both sides of the right-handed screw rod. One end of the right clamping arm and the left clamping arm close to the connecting block c extends to the connecting block c and is rotatably connected with the connecting block c. On both sides of the right-handed screw rod and the left-handed screw rod corresponding to the upper part of the connecting block d, a connecting rod c is rotatably connected. The other side of the connecting rod c is respectively 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 arranged between the right-handed screw rod and the right clamping arm and the left clamping arm. The right support block and the left support block are both rotatably connected with the connecting block a and the connecting block b through connecting rods.

[0006] The present invention is further characterized in that

[0007] It also includes a rotary worktable. A support rod is installed on the rotary worktable. The other end of the support rod is fixedly connected to the connection point of the right-handed screw rod and the left-handed screw rod. A plurality of T-shaped grooves 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-shaped block matching the T-shaped groove is arranged at the lower end of the support rod. The rotary worktable and the support rod are slidably connected through the cooperation of the T-shaped block and the T-shaped groove.

[0008] A handle is arranged at one end of the left-handed screw rod far from the right-handed screw rod.

[0009] A semi-circular hoop a is fixedly connected to the top of the support rod. It also includes a semi-circular hoop b. The connection part of the right-handed screw rod and the left-handed screw rod is fixed in the hoop formed by the combination of the semi-circular hoop a and the semi-circular hoop b through bolt connection.

[0010] Both the right-handed screw rod and the left-handed screw rod are horizontally arranged. An outer sleeve is arranged at one end of the right-handed screw rod close to the left-handed screw rod. An inner sleeve is arranged at one end of the left-handed screw rod close to the right-handed screw rod. The inner sleeve extends into the outer sleeve and is connected with the outer sleeve through a connecting pin.

[0011] The right-handed screw rod passes through the connecting block a and is connected with the connecting block a through a right-handed thread. An inner hole is opened on the connecting block b. The position where the right-handed screw rod is connected with the connecting block b is set as a smooth shaft. The right-handed screw rod extends into the inner hole of the connecting block b and can rotate in the inner hole of the connecting block b. An axial limiting boss a of the connecting block b is arranged at one end of the right-handed screw rod close to the left-handed screw rod;

[0012] The left-handed screw rod passes through the connecting block d and is connected to the connecting block d by left-handed threads. An inner hole is provided on the connecting block c. The position where the left-handed screw rod is connected to the connecting block c is set as a smooth shaft. The left-handed screw rod extends into the inner hole of the connecting block c and is rotatable within the inner hole of the connecting block c. An axial limiting boss b of the connecting block c is provided at one end of the left-handed screw rod away from the right-handed screw rod.

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

[0014] The link rod b and the link rod a are respectively rotatably connected to the right support block, the left support block, the connecting block a, and the connecting block b by pin shafts; the link rod c is rotatably connected to the right clamping arm, the left clamping arm, and the connecting block d by pin shafts; the right clamping arm and the left clamping arm are rotatably connected to the connecting block c by pin shafts.

[0015] The link rods b or link rods a on the upper and lower sides of the right support block, the left support block, the connecting block a, and the connecting block b are arranged symmetrically up and down. The link rods b or link rods a on both sides of the connecting block a and the connecting block b corresponding to the right support block and the left support block are arranged symmetrically left and right. Link rods c are provided at the positions of the right clamping arm and the left clamping arm corresponding to the upper and lower sides of the connecting block d, and the link rods c on the upper and lower sides are arranged symmetrically.

[0016] It further includes a fixing device. The fixing device includes a fixing shaft and a pressing block. The lower end of the fixing shaft is provided with a T-shaped slider that cooperates with a T-shaped groove. The fixing shaft is slidably connected to the rotary worktable through the cooperation of the T-shaped groove and the T-shaped slider. The upper end of the fixing shaft is provided with threads. A chute is provided on the pressing block. The upper end of the fixing shaft extends into the chute, and a bolt is also connected to the threaded portion of the fixing shaft.

[0017] The beneficial effects of the present invention are:

[0018] In the present invention, the main drive shaft is composed of a right-handed screw rod and a left-handed screw rod. The two are connected by a pin shaft to achieve power transmission. By installing connecting block a and connecting block b on the right-handed screw rod, and installing connecting block d and connecting block c on the left-handed screw rod, and connecting them with a right support block and a left support block through a connecting rod, the right support block and the left support block are expanded to expand the corresponding right clamping arm or left clamping arm, so as to reliably clamp the workpiece. Since the right-handed screw rod and the left-handed screw rod are connected by a connecting pin, after the workpiece is clamped and the connecting pin is removed, the two outer right support blocks and left support blocks can still maintain the clamping state of the workpiece, providing a stable clamping force during the machining process of the workpiece. Moreover, the clamping device of the present invention does not require any auxiliary machining on the workpiece, so the deformation of the workpiece caused by removing the tooling after machining is extremely small. 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 at the connection of the right-handed screw rod and the left-handed screw rod by means of a hoop, so as to further ensure that the tooling will not loosen under the conditions of workpiece vibration or unilateral force during the machining process and can still effectively support. Brief Description of the Drawings

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

[0020] Figure 2 is Figure 1 side view of;

[0021] Figure 3 is Figure 1 top view of;

[0022] Figure 4 is a schematic structure diagram of the quadrilateral link mechanism and link c in the clamping device for machining open plate-shell structural parts of the present invention;

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

[0024] In the figure, 1. Rotary table, 2. Workpiece, 3. Fixing device, 3-1. Fixing shaft, 3-2. Pressure block, 3-3. Chute, 3-4. Bolt, 4. Right-handed 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-shaped block, 10-2. Semi-circular hoop a, 10-3. Semi-circular hoop b, 11. Connecting pin, 12. Connecting rod c, 13. Connecting block c, 14. Left-handed 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-shaped groove, 19. Handle. Specific embodiments

[0025] The present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0026] Embodiment 1

[0027] The clamping device of the present invention for processing open plate and shell structural parts has a structure as Figures 1-3 shown, including a right-handed screw 4 and a left-handed screw 14 detachably connected as a whole. One end of the right-handed screw 4 away from and close to the left-handed screw 14 is respectively connected with a connecting block a5 and a connecting block b9. One end of the left-handed screw 14 away from and close to the right-handed screw 4 is respectively connected with a connecting block c13 and a connecting block d15. It also includes a right clamping arm 7 and a left clamping arm 16 symmetrically distributed on both sides of the right-handed screw 4. One end of the right clamping arm 7 and the left clamping arm 16 close to the connecting block c13 extends to the connecting block c13 and is rotatably connected to the connecting block c13. On both sides of the right-handed screw 4 and the left-handed screw 14 corresponding to the upper part of the connecting block d15, connecting rods c12 are rotatably connected. The other side of the connecting rods c12 is respectively rotatably connected to the right clamping arm 7 and the left clamping arm 16 on the corresponding side. Between the right-handed screw 4 and the right clamping arm 7 and the left clamping arm 16, there are respectively a right support block 6 and a left support block 17. The right support block 6 and the left support block 17 are both rotatably connected to the connecting block a5 and the connecting block b9 through connecting rods 8.

[0028] It also includes a rotary table 1. A support rod 10 is installed on the rotary table 1. The other end of the support rod 10 is fixedly connected to the connection point of the right-handed screw 4 and the left-handed screw 14. A plurality of T-shaped grooves 18 are evenly arranged on the rotary table 1. The support rod 10 is vertically arranged and perpendicular to the working plane of the rotary table 1. The lower end of the support rod 10 is provided with a T-shaped block 10-1 that cooperates with the T-shaped groove 18. The rotary table 1 and the support rod 10 are slidably connected through the cooperation of the T-shaped block 10-1 and the T-shaped groove 18.

[0029] As Figure 5As shown in the figure, a semi-circular hoop a 10-2 is fixedly connected to the top of the strut 10. It also includes a semi-circular hoop b 10-3. The connection part of the right-handed screw rod 4 and the left-handed screw rod 14 is fixed inside the hoop formed by connecting the semi-circular hoop a 10-2 and the semi-circular hoop b 10-3 with bolts.

[0030] Both the right-handed screw rod 4 and the left-handed screw rod 14 are horizontally arranged. An outer sleeve 4-1 is arranged at one end of the right-handed screw rod 4 close to the left-handed screw rod 14. An inner sleeve 14-2 is arranged at one end of the left-handed screw rod 14 close to the right-handed screw rod 4. The inner sleeve 14-2 extends into the outer sleeve 4-1 and is connected to the outer sleeve 4-1 through a connecting pin 11. After removing the connecting pin 11, when the left-handed screw rod 14 rotates, the inner sleeve 14-2 is rotatably connected inside the outer sleeve 4-1.

[0031] The right-handed screw rod 4 passes through the connecting block a 5 and is connected to the connecting block a 5 through a right-handed thread. An inner hole is formed in the connecting block b 9. The position where the right-handed screw rod 4 is connected to the connecting block b 9 is set as a smooth shaft. The right-handed screw rod 4 extends into the inner hole of the connecting block b 9 and can rotate inside the inner hole of the connecting block b 9. An axial limiting boss a 4-2 of the connecting block b 9 is arranged at one end of the right-handed screw rod 4 close to the left-handed screw rod 14.

[0032] The left-handed screw rod 14 passes through the connecting block d 15 and is connected to the connecting block d 15 through a left-handed thread. An inner hole is formed in the connecting block c 13. The position where the left-handed screw rod 14 is connected to the connecting block c 13 is set as a smooth shaft. The left-handed screw rod 14 extends into the inner hole of the connecting block c 13 and can rotate inside the inner hole of the connecting block c 13. An axial limiting boss b 14-1 of the connecting block c 13 is arranged at one end of the left-handed screw rod 14 far from the right-handed screw rod 4.

[0033] As Figure 4 shown, the right support block 6 and the left support block 17 are respectively arranged between the right-handed screw rod 4 and the right clamping arm 7, and between the right-handed screw rod 4 and the left clamping arm 16. Link rods a 8-1 are rotatably connected to both sides of the connecting block a 5 corresponding to the right support block 6 and the left support block 17. The other end of the link rod a 8-1 is rotatably connected to the right-handed screw rod 4 or the right clamping arm 7 on the corresponding side. Link rods b 8-2 are rotatably connected to both sides of the connecting block b 9 corresponding to the right support block 6 and the left support block 17. The other end of the link rod b 8-2 is rotatably connected to the right-handed screw rod 4 or the right clamping arm 7 on the corresponding side.

[0034] Quadrilateral link mechanisms are arranged on both the upper and lower sides of the right support block 6, the left support block 17, the connecting block a 5, and the connecting block b 9, and the quadrilateral link mechanisms on the upper and lower sides are symmetrically arranged. Link rods c 12 are arranged at the positions of the right clamping arm 7 and the left clamping arm 16 corresponding to both the upper and lower sides of the connecting block d 15.

[0035] It further includes a fixing device 3, and the fixing device 3 includes a fixing shaft 3-1 and a pressing block 3-2. The fixing shaft 3-1 is provided with a T-shaped slider that cooperates with the T-shaped groove 18 provided at the lower end. The fixing shaft 3-1 is slidably connected to the rotary table 1 through the cooperation of the T-shaped groove 18 and the T-shaped slider. The upper end of the fixing shaft 3-1 is provided with a thread, and the pressing block 3-2 is provided with a chute 3-3. The upper end of the fixing shaft 3-1 extends into the chute 3-3, and a bolt 3-4 is also connected to the threaded portion of the fixing shaft 3-1.

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

[0037] Place two workpieces 2 parallel to each other on the rotary table 1, and then install the fixing device 3. First, insert the fixing shaft 3-1 of the fixing device 3 into the rotary table 1 and adjust it to the appropriate position, and then use the bolt 3-4 to clamp the pressing block 3-2 against the two workpieces 2.

[0038] When the present invention is set, it is ensured that the right support block 6 and the left support block 17 are located between the two workpieces 2, and when the opening distance between the right clamping arm 7 and the left clamping arm 16 is the largest, they are located outside the corresponding workpiece 2 on one side.

[0039] When the present invention is set, the inner sleeve 14-2 and the outer sleeve 4-1 are provided with a plurality of pin holes along the length direction of their nesting.

[0040] When clamping the workpiece 2, first connect the right-handed screw rod 4 and the left-handed screw rod 14 through the connecting pin 11. Rotate the handle on the left-handed screw rod 14 counterclockwise. At this time, the connecting block a5 moves away from the handle of the left-handed screw rod 14 through thread transmission, and drives the right support block 6 and the left support block 17 to approach each other through the connecting rod a8-1 and the connecting rod b8-2. And the connecting block d15 moves towards the direction of the handle 19 of the left-handed screw rod 14 through thread transmission, and drives the right clamping arm 7 and the left clamping arm 16 to move away from each other through the connecting rod c12, so that the distance between the two gradually increases. When this distance is greater than the maximum distance between the two single plates of the workpiece 2, at this time, the right clamping arm 7 and the left clamping arm 16 are respectively on the outer sides of the corresponding side of the workpiece 2. At this time, rotate the handle on the left-handed screw rod 14 clockwise. The connecting block a5 moves towards the direction of the handle of the left-handed screw rod 14 through thread transmission, and drives the right support block 6 and the left support block 17 to open through the connecting rod a8-1 and the connecting rod b8-2. At the same time, the connecting block d15 moves in the opposite direction of the handle of the left-handed screw rod 14 through thread transmission, and drives the right clamping arm 7 and the left clamping arm 16 to approach each other. When the right support block 6 and the right clamping arm 7 respectively correspond to the workpiece 2 on one side, that is, when the right support block 6 and the left support block 17 support the inner side wall of the workpiece 2 in place. At this time, remove the connecting pin 11, rotate the handle on the left-handed screw rod 14 clockwise, and the right clamping arm 7 and the left clamping arm 16 continue the clamping action, while the right-handed screw rod 4 and the right support block 6 and the left support block 17 on it remain stationary. When the clamping force of the workpiece is appropriate, reconnect the right-handed screw rod 4 and the left-handed screw rod 14 with the connecting pin 11. After the above steps are completed, the installation of the support rod 10 can be carried out. First, install the T-shaped block 10-1 of the support rod 10 into the corresponding T-shaped groove 18 of the rotary table 1, and then move it to the connection part of the right-handed screw rod 4 and the left-handed screw rod 14, and fix it to the right-handed screw rod 4 through two bolts, thus completing the installation of this workpiece. After the processing of one single plate on one side of the workpiece 2 is completed, by rotating the rotary table 1 by 180°, the processing of the single plate on the other side can be carried out. When the workpiece 2 is processed and the tooling needs to be disassembled from the workpiece 2, first rotate the handle on the left-handed screw rod 14 counterclockwise to loosen the workpiece by the right support block 5 and the right clamping arm 6, and then remove the bolts on the support rod 10 and take out the support rod 10 to complete the disassembly.

[0041] Embodiment 2

[0042] On the basis of Embodiment 1, the connecting rods b8-2 or a8-1 on 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 are symmetrically arranged up and down. The connecting rods b8-2 or a8-1 on the two sides of the connecting block a5 and the connecting block b9 corresponding to the right support block 6 and the left support block 17 are symmetrically arranged left and right. Link rods c12 are provided at the positions of the right clamping arm 7 and the left clamping arm 16 corresponding to the upper and lower sides of the connecting block d15, and the link rods c12 on the upper and lower sides are symmetrically arranged.

[0043] Embodiment 3

[0044] On the basis of Embodiment 2, the connecting rod b8-2 and the connecting rod a8-1 are respectively rotatably connected to the right support block 6, the left support block 17, the connecting block a5 and the connecting block b9 by pin shafts; the connecting rod c12 is rotatably connected to the right clamping arm 7, the left clamping arm 16 and the connecting block d15 by pin shafts; the right clamping arm 7 and the left clamping arm 16 are rotatably connected to the connecting block c13 by pin shafts.

[0045] The structure of the present invention is simple, the operation is convenient, and it is applicable to various horizontal and vertical machine tool processing. It can adapt to workpieces with a single-board thickness of 10 mm - 30 mm, improving the machining accuracy and surface quality of the workpieces. Compared with the prior art, it has the following effects and characteristics: 1) The structure is simple, the disassembly and assembly are convenient, and it can be applicable to workpieces within a certain size range. 2) It can provide a stable clamping force for the workpiece during the machining process, effectively enhancing the machining stability of the workpiece. 3) After the machining is completed and the tooling is removed, the stress release is controllable, which does not affect the machining accuracy of the workpiece and ensures the machining quality of the workpiece. 4) After the inner side of the workpiece is clamped in place, the outer side can continue to be clamped, and it can be reliably supported under working conditions such as vibration or unilateral force. 5) Using the present invention can reduce the auxiliary processing time required for workpiece clamping and improve the processing efficiency.

Claims

1. A clamping device for processing open shell structural parts, characterized in that, It includes a right-handed screw rod (4) and a left-handed screw rod (14) detachably connected as a whole. At one end of the right-handed screw rod (4) away from and close to the left-handed screw rod (14), there are respectively connected a connecting block a (5) and a connecting block b (9). At one end of the left-handed screw rod (14) away from and close to the right-handed screw rod (4), there are respectively connected a connecting block c (13) and a connecting block d (15). It also includes a right clamping arm (7) and a left clamping arm (16) symmetrically distributed on both sides of the right-handed screw rod (4). One end of the right clamping arm (7) and the left clamping arm (16) close to the connecting block c (13) extends to the connecting block c (13) and is rotatably connected to the connecting block c (13). Above the connecting block d (15), there are two connecting rods c (12) rotatably connected on both sides corresponding to the right-handed screw rod (4) and the left-handed screw rod (14). The other side of the connecting rod c (12) is respectively rotatably connected to the right clamping arm (7) and the left clamping arm (16) on the corresponding side. Between the right-handed screw rod (4) and the right clamping arm (7), and the left clamping arm (16), there are respectively provided a right support block (6) and a left support block (17). The right support block (6) and the left support block (17) are both rotatably connected to the connecting block a (5) and the connecting block b (9) through a connecting rod (8).

2. The clamping device for processing open shell structural parts according to claim 1, characterized in that, It also includes a rotary worktable (1). A support rod (10) is installed on the rotary worktable (1). The other end of the support rod (10) is fixedly connected to the connection point of the right-handed screw rod (4) and the left-handed screw rod (14). There are a plurality of T-shaped grooves (18) 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). At the lower end of the support rod (10), there is a T-shaped block (10-1) matching with the T-shaped groove (18). The rotary worktable (1) and the support rod (10) are slidably connected through the cooperation of the T-shaped block (10-1) and the T-shaped groove (18).

3. The clamping device for processing open shell structural parts according to claim 1, characterized in that, At one end of the left-handed screw rod (14) away from the right-handed screw rod (4), there is a handle (19).

4. The clamping device for processing open shell structural parts according to any one of claims 1 - 3, characterized in that, At the top of the support rod (10), there is a semi-circular hoop a (10-2). It also includes a semi-circular hoop b (10-3). The connection part of the right-handed screw rod (4) and the left-handed screw rod (14) is fixed in the hoop formed by the combination of the semi-circular hoop a (10-2) and the semi-circular hoop b (10-3) connected by bolts.

5. The clamping device for processing open shell structural parts according to claim 4, characterized in that, Both the right-handed screw rod (4) and the left-handed screw rod (14) are horizontally arranged. At one end of the right-handed screw rod (4) close to the left-handed screw rod (14), there is an outer sleeve (4-1). At one end of the left-handed screw rod (14) close to the right-handed screw rod (4), there is an inner sleeve (14-2). The inner sleeve (14-2) extends into the outer sleeve (4-1) and is connected to the outer sleeve (4-1) through a connecting pin (11).

6. The clamping device for processing open shell structural parts according to claim 5, characterized in that, The right-handed screw rod (4) passes through the connecting block a (5) and is connected to the connecting block a (5) by a right-handed thread. An inner hole is provided in the connecting block b (9). The position where the right-handed screw rod (4) is connected to the connecting block b (9) is set as a smooth shaft. The right-handed screw rod (4) extends into the inner hole of the connecting block b (9) and is rotatable within the inner hole of the connecting block b (9). An axial limiting boss a (4-2) of the connecting block b (9) is provided at one end of the right-handed screw rod (4) close to the left-handed screw rod (14). The left-handed screw rod (14) passes through the connecting block d (15) and is connected to the connecting block d (15) by a left-handed thread. An inner hole is provided in the connecting block c (13). The position where the left-handed screw rod (14) is connected to the connecting block c (13) is set as a smooth shaft. The left-handed screw rod (14) extends into the inner hole of the connecting block c (13) and is rotatable 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 one end of the left-handed screw rod (14) far from the right-handed screw rod (4).

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

8. The clamping device for processing open shell structural parts according to claim 7, characterized in that, The connecting rod b (8-2) and the connecting rod a (8-1) are respectively rotatably connected to the right support block (6), the left support block (17), the connecting block a (5), and the connecting block b (9) by 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) by pins; the right clamping arm (7) and the left clamping arm (16) are rotatably connected to the connecting block c (13) by pins.

9. The clamping device for processing open shell structural parts according to claim 8, characterized in that, The connecting rods b (8-2) or connecting rods a (8-1) on the upper and lower sides of the right support block (6), the left support block (17), the connecting block a (5), and the connecting block b (9) are symmetrically arranged up and down. The connecting rods b (8-2) or connecting rods a (8-1) on both sides of the connecting block a (5) and the connecting block b (9) corresponding to the right support block (6) and the left support block (17) are symmetrically arranged left and right. Connecting rods c (12) are provided at the positions of the right clamping arm (7) and the left clamping arm (16) corresponding to the upper and lower sides of the connecting block d (15), and the connecting rods c (12) on the upper and lower sides are symmetrically arranged.

10. The clamping device for processing open shell structural parts according to claim 9, characterized in that, It further includes a fixing device (3), and the fixing device (3) includes a fixing shaft (3-1) and a pressing block (3-2). The fixing shaft (3-1) is provided with a T-shaped slider that cooperates with the T-shaped groove (18) provided at the lower end. The fixing shaft (3-1) and the rotary table (1) are slidably connected through the cooperation of the T-shaped groove (18) and the T-shaped slider. The upper end of the fixing shaft (3-1) is provided with a thread. A chute (3-3) is provided on the pressing block (3-2). The upper end of the fixing shaft (3-1) extends into the chute (3-3), and a bolt (3-4) is also connected to the threaded portion of the fixing shaft (3-1).

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