Anti-deformation clamping device for numerical control machining of thin-walled aircraft parts

Abstract

The utility model discloses an aircraft thin -walled spare numerical control processing anti -deformation clamping device relates to numerical control processing technical field, including clamping station, and the fixed block is installed on the clamping station, and the fixed clamp is slidably arranged on the clamping station top, and the lower clamping plate and the movable clamping plate are slidably installed in the fixed clamp inner chamber, and the soft pad is installed on the lower clamping plate and movable clamping board, and the pressure sensor is installed in the fixed clamp inner chamber, and the microcontroller and the prompter are installed on the fixed clamp top, and the pressure screw rod is screwed in the fixed clamp, and the screw rod top is installed rotatory block, and the fixed location rotary groove is seted up on the movable clamping plate, and the fixed location rotary ring is fixedly sleeved on the pressure screw rod, and the fixed location rotary ring rotation is installed in the fixed location rotary groove, and the T type guide rod is slidably installed in the T type guide groove, and the T type guide rod is installed in the fixed clamp bottom, the clamping device of the utility model can be adapted to the clamping fixation of different size thin -walled spare, and the clamping force to the thin -walled spare is adjusted, and the deformation of the aircraft thin -walled spare caused by the excessive clamping force is avoided.

Description

Technical Field

[0001] This utility model belongs to the field of CNC machining equipment technology, specifically relating to a deformation-resistant clamping device for CNC machining of thin-walled aircraft parts. Background Technology

[0002] Thin-walled components are the main body and foundation of aircraft structures. Through ingenious design and assembly, they achieve core functions such as load bearing, maintaining aerodynamic shape, providing rigidity, separating space, protecting contents, and supporting various systems with minimal weight. The manufacture of thin-walled components requires corresponding CNC machining.

[0003] Chinese Patent CN120134025A (application date: 20250516) discloses a CNC machining fixture for thin-walled aircraft frame parts, relating to the field of CNC machining technology. The fixture includes a machining frame and a clamping assembly. An L-shaped plate is fixedly mounted on the right side of the machining frame, and a servo motor is fixedly mounted on the right side of the L-shaped plate. A lead screw is fixedly mounted on the output end of the servo motor. A U-shaped frame is fixedly mounted on the surface of the machining frame, and a gear is rotatably mounted on the top of the U-shaped frame. A clamping plate is slidably mounted on the top of the machining frame. A rack is fixedly mounted on the left side of the clamping plate, meshing with the gear. An auxiliary plate is slidably mounted on the top of the machining frame, and a rack is fixedly mounted on the right side of the auxiliary plate, meshing with the gear. The clamping plate is limited by a limiting plate and cannot move further to clamp the workpiece. The anti-pinch protection of the limiting plate prevents excessive concentration of clamping force at a single point, thereby reducing workpiece deformation.

[0004] The device is difficult to adjust the clamping force when clamping thin-walled aircraft parts, which can easily cause deformation and damage to the parts. In addition, most of the clamping mechanism overlaps above the clamping plate, which can hinder the processing of thin-walled aircraft parts. Therefore, a deformation-resistant clamping device for CNC machining of thin-walled aircraft parts is needed to meet the application requirements. Utility Model Content

[0005] The purpose of this invention is to provide a clamping device to prevent deformation during CNC machining of thin-walled aircraft parts. It solves the problem of existing clamping devices having difficulty adjusting the clamping force, which easily leads to deformation and damage to thin-walled aircraft parts.

[0006] The technical solution adopted by this utility model is as follows: a CNC machining anti-deformation clamping device for thin-walled aircraft parts, including a clamping table, fixed blocks installed on both sides of the clamping table, a fixed fixture slidably installed on the top of the clamping table, a lower clamping plate and a movable clamping plate slidably installed in the inner cavity of the fixed fixture, soft pads installed on both the lower clamping plate and the movable clamping plate, a pressure sensor installed at the bottom of the lower clamping plate in the inner cavity of the fixed fixture, a microcontroller and a prompter installed on the top of the fixed fixture, and the pressure sensor is electrically connected to the microcontroller and the prompter.

[0007] The technical solution adopted in this utility model is also characterized by: Furthermore, a pressure screw is screwed into the fixed clamp, the end of which is connected to the movable clamping plate. The pressure screw passes through the upper part of the fixed clamp and a rotating block is installed on the top.

[0008] Furthermore, a retaining groove is provided on the movable clamping plate, and a retaining ring is fixedly sleeved on the pressure screw, with the retaining ring rotatably installed in the retaining groove.

[0009] Furthermore, a T-shaped guide groove is provided on the clamping platform, and a T-shaped guide rod is slidably installed in the T-shaped guide groove. The T-shaped guide rod is installed at the bottom of the fixed clamp.

[0010] Furthermore, a pull rod is rotatably mounted on the T-shaped guide rod, and a rotating rod is rotatably mounted on the other end of the pull rod. A support plate is installed inside the clamping platform, and a rotating shaft is installed in the middle of the rotating rod. The rotating shaft passes through the support plate and is rotatably mounted inside it.

[0011] Furthermore, a ratchet is fixedly sleeved on the rotating shaft, and a pawl is rotatably mounted on the support plate, with the pawl engaging in the tooth gap of the ratchet.

[0012] Furthermore, a first torsion spring is installed at the connection between the support plate and the ratchet, and a second torsion spring is installed at the connection between the support plate and the ratchet.

[0013] Furthermore, an opening is provided at the bottom of the clamping platform, and a knob is installed at the top of the rotating shaft.

[0014] The beneficial effects of this utility model are: In this invention, the thin-walled component is placed in a fixed fixture, and then the pressure screw is turned into the fixed fixture. The downward movement of the pressure screw will cause the movable clamping plate and the soft pad to slide downward. The downward sliding of the movable clamping plate can clamp and fix the thin-walled component. When the thin-walled component is clamped, the pressure sensor is squeezed and will transmit the pressure signal to the microcontroller. The clamping force of the thin-walled component is preset. When the clamping force reaches the preset force, the microcontroller will control the prompt to sound. At this time, the turning of the pressure screw is stopped to avoid applying too much clamping force and causing deformation of the aircraft thin-walled component.

[0015] In this invention, rotating the knob clockwise will drive the rotating shaft to rotate, which in turn will drive a pair of fixed clamps, a lower clamp, and a movable clamp to move and move closer to each other, thus adapting to the clamping and fixing of thin-walled parts of different sizes. When the ratchet rotates counterclockwise, the pawl will abut against the teeth of the ratchet, thereby hindering the counterclockwise rotation of the ratchet. After clamping the thin-walled part, the fixed clamps, the lower clamp, and the movable clamp can be kept in a fixed position, improving the stability of the thin-walled part. Attached Figure Description

[0016] Figure 1This is a schematic diagram of the overall structure of the anti-deformation clamping device for CNC machining of thin-walled aircraft parts proposed in this utility model; Figure 2 This is a schematic diagram of the lower clamping plate and movable clamping plate structure of the anti-deformation clamping device for CNC machining of thin-walled aircraft parts proposed in this utility model. Figure 3 This is a schematic diagram of the movable clamping plate and pressure screw structure of the anti-deformation clamping device for CNC machining of thin-walled aircraft parts proposed in this utility model. Figure 4 This is a schematic diagram of the ratchet and pawl structure of the anti-deformation clamping device for CNC machining of thin-walled aircraft parts proposed in this utility model. Figure 5 This is a schematic diagram of the working principle of the ratchet and pawl of the anti-deformation clamping device for CNC machining of thin-walled aircraft parts proposed in this utility model.

[0017] In the diagram, 1. Clamping platform, 2. Fixing block, 3. Fixing fixture, 4. Lower clamping plate, 5. Movable clamping plate, 6. Soft pad, 7. Pressure sensor, 8. Microcontroller, 9. Indicator, 10. Pressure screw, 11. Rotating block, 12. Fixing groove, 13. Fixing ring, 14. T-shaped guide groove, 15. T-shaped guide rod, 16. Pull rod, 17. Rotating rod, 18. Support plate, 19. Rotating shaft, 20. Ratchet, 21. Pawl, 22. Torsion spring No. 1, 23. Torsion spring No. 2, 24. Through port, 25. Knob. Detailed Implementation

[0018] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0019] The subject matter of this utility model disclosure will now be described more fully with reference to exemplary embodiments. However, the disclosed concepts may be implemented in different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art. (By referring to the accompanying drawings...) Figure 1 The features of the embodiments disclosed herein and how to implement the features of the embodiments disclosed herein will become apparent from the embodiments described in more detail herein.

[0020] This utility model provides a deformation-resistant clamping device for CNC machining of thin-walled aircraft parts, such as... Figure 1 As shown, the specific structure and working principle are as follows: like Figure 1 As shown, this embodiment provides a CNC machining anti-deformation clamping device for thin-walled aircraft parts, including a clamping table 1, a fixing block 2 mounted on the clamping table 1, and a fixing fixture 3 slidably disposed on the top of the clamping table 1, as shown. Figure 2As shown, a lower clamping plate 4 and a movable clamping plate 5 are slidably installed in the inner cavity of the fixed clamp 3. Soft pads 6 are installed on both the lower clamping plate 4 and the movable clamping plate 5. A pressure sensor 7 is installed in the inner cavity of the fixed clamp 3. A microcontroller 8 and an indicator 9 are installed on the top of the fixed clamp 3. When a thin-walled part is placed in the fixed clamp 3, the movable clamping plate 5 can slide downwards to clamp and fix the thin-walled part. The soft pads 6 can directly contact the thin-walled part to increase contact friction and improve the clamping and fixing effect of the thin-walled part.

[0021] When clamping thin-walled parts, the pressure sensor 7, when compressed, transmits a pressure signal to the microcontroller 8. A pre-set clamping force is applied to the thin-walled part. Once the preset force is reached, the microcontroller 8 activates an indicator 9, stopping pressure on the movable clamping plate 5 to prevent excessive clamping force from deforming the aircraft's thin-walled parts. Furthermore, after clamping the thin-walled part, the microcontroller maintains the positions of the fixed clamps 3, the lower clamping plate 4, and the movable clamping plate 5, improving the stability of the thin-walled part's fixation.

[0022] To drive the movable clamping plate 5 and the soft pad 6 to move downwards, thus clamping and fixing the thin-walled part. For example... Figure 3 As shown, a pressure screw 10 is screwed into the fixed clamp 3, and a rotating block 11 is installed on the top of the pressure screw 10. A retaining groove 12 is opened on the movable clamp 5, and a retaining rotating ring 13 is fixedly sleeved on the pressure screw 10. The retaining rotating ring 13 is rotatably installed in the retaining groove 12. When the pressure screw 10 is screwed into the fixed clamp 3, the pressure screw 10 moves downward, which will drive the movable clamp 5 and the soft pad 6 to slide downward. The downward sliding of the movable clamp 5 can clamp and fix the thin-walled part. The soft pad 6 directly contacts the thin-walled part, which can increase the contact friction and improve the clamping and fixing effect of the thin-walled part.

[0023] To guide the movement of the fixed clamp 3, lower clamp 4, and movable clamp 5, a T-shaped guide groove 14 is provided on the clamping table 1. A T-shaped guide rod 15 is slidably installed in the T-shaped guide groove 14 and installed at the bottom of the fixed clamp 3. The sliding of the T-shaped guide rod 15 in the T-shaped guide groove 14 can guide the movement of the fixed clamp 3, lower clamp 4, and movable clamp 5, so that the pair of fixed clamps 3, lower clamp 4, and movable clamp 5 can only move and approach each other on the clamping table 1.

[0024] To drive a pair of fixed clamps 3, lower clamping plate 4, and movable clamping plate 5 to move and approach each other, adapting to the clamping and fixing of thin-walled parts of different sizes, a pull rod 16 is rotatably mounted on the T-shaped guide rod 15, and a rotating rod 17 is rotatably mounted on the other end of the pull rod 16. A support plate 18 is installed inside the clamping table 1, and a rotating shaft 19 is mounted on the rotating rod 17. The rotating shaft 19 is rotatably mounted inside the support plate 18. An opening 24 is provided on the clamping table 1, and a knob 25 is installed at the top of the rotating shaft 19: the operator can... Turning the knob 25 through the port 24 clockwise will cause the rotating shaft 19 to rotate, which in turn will cause the rotating rod 17 to rotate, which in turn will cause the pull rod 16 to rotate. The rotation of the pair of pull rods 16 will pull a pair of T-shaped guide rods 15 to move closer to each other. The movement and proximity of the pair of T-shaped guide rods 15 will cause a pair of fixed clamps 3, lower clamping plate 4, and movable clamping plate 5 to move closer to each other, which can be adapted to clamping and fixing thin-walled parts of different sizes.

[0025] To improve the stability of fixing thin-walled parts. For example... Figure 4 and Figure 5 As shown, a ratchet 20 is fixedly sleeved on the rotating shaft 19, and a pawl 21 is rotatably mounted on the support plate 18. The pawl 21 engages in the tooth gap of the ratchet 20. A first torsion spring 22 is mounted on the support plate 18 and the pawl 21, and a second torsion spring 23 is mounted on the support plate 18 and the ratchet 20. The clockwise rotation of the rotating shaft 19 is unaffected by the pawl 21, and the ratchet 21 maintains close contact with the tooth gap of the ratchet 20 under the action of the ratchet 20. Under the reset action of the second torsion spring 23, there is a tendency to drive the ratchet 20 to rotate counterclockwise. When the ratchet 20 rotates counterclockwise, the pawl 21 will abut against the tooth gap of the ratchet 20, thereby hindering the counterclockwise rotation of the ratchet 20. After clamping the thin-walled part, the positions of the pair of fixed clamps 3, lower clamp 4, and movable clamp 5 can be fixed, improving the stability of the thin-walled part.

[0026] Working principle: In use, the clamping table 1 is fixed in a suitable position by the fixing block 2, and the thin-walled part is placed in the fixing fixture 3. Then, the pressure screw 10 is turned into the fixing fixture 3. The downward movement of the pressure screw 10 will cause the movable clamping plate 5 and the soft pad 6 to slide downward. The downward sliding of the movable clamping plate 5 can clamp and fix the thin-walled part. The soft pad 6 directly contacts the thin-walled part, which increases the contact friction and improves the clamping and fixing effect of the thin-walled part. When clamping the thin-walled part, the pressure sensor 7 will be squeezed and transmit the pressure signal to the microcontroller 8. The clamping force of the thin-walled part is preset. When the clamping force reaches the preset force, the microcontroller 8 will control the prompt 9 to sound. At this time, the turning of the pressure screw 10 will be stopped to avoid excessive clamping force causing deformation of the aircraft thin-walled part. On the other hand, rotating the knob 25 clockwise will cause the rotating shaft 19 to rotate, which in turn will cause the rotating rod 17 to rotate, which in turn will cause the pull rod 16 to rotate. The rotation of the pair of pull rods 16 will pull a pair of T-shaped guide rods 15 to move and move closer to each other. The movement and movement of the pair of T-shaped guide rods 15 will cause a pair of fixed clamps 3, lower clamping plate 4, and movable clamping plate 5 to move and move closer to each other, which can be adapted to clamping and fixing thin-walled parts of different sizes. The clockwise rotation of the rotating shaft 19 is not affected by the pawl 21, and under the action of the ratchet 20, the pawl 21 and the ratchet 20 can maintain a tight contact between their teeth. Under the reset action of the second torsion spring 23, there is a tendency to drive the ratchet 20 to rotate counterclockwise. When the ratchet 20 rotates counterclockwise, the pawl 21 will abut against the tooth gap of the ratchet 20, thereby hindering the counterclockwise rotation of the ratchet 20. After clamping the thin-walled part, the positions of a pair of fixed clamps 3, lower clamp 4, and movable clamp 5 can be fixed, improving the stability of fixing the thin-walled part.

[0027] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to specific embodiments.

[0028] Example 1 A CNC machining anti-deformation clamping device for thin-walled aircraft parts includes a clamping table 1, with fixed blocks 2 installed on both sides of the clamping table 1. A fixed fixture 3 is slidably installed on the top of the clamping table 1. A lower clamping plate 4 and a movable clamping plate 5 are slidably installed in the inner cavity of the fixed fixture 3. A soft pad 6 is installed on both the lower clamping plate 4 and the movable clamping plate 5. A pressure sensor 7 is installed at the bottom of the lower clamping plate 4 in the inner cavity of the fixed fixture 3. A microcontroller 8 and a prompter 9 are installed on the top of the fixed fixture 3. The pressure sensor 7 is electrically connected to the microcontroller 8 and the prompter 9.

[0029] Example 2 A CNC machining anti-deformation clamping device for thin-walled aircraft parts includes a clamping table 1, with fixed blocks 2 installed on both sides of the clamping table 1. A fixed fixture 3 is slidably installed on the top of the clamping table 1. A lower clamping plate 4 and a movable clamping plate 5 are slidably installed in the inner cavity of the fixed fixture 3. A soft pad 6 is installed on both the lower clamping plate 4 and the movable clamping plate 5. A pressure sensor 7 is installed at the bottom of the lower clamping plate 4 in the inner cavity of the fixed fixture 3. A microcontroller 8 and a prompter 9 are installed on the top of the fixed fixture 3. The pressure sensor 7 is electrically connected to the microcontroller 8 and the prompter 9.

[0030] A pressure screw 10 is screwed into the fixed clamp 3. The end of the pressure screw 10 is connected to the movable clamp 5. The pressure screw 10 passes through the upper part of the fixed clamp 3 and a rotating block 11 is installed on the top.

[0031] Example 3 A CNC machining anti-deformation clamping device for thin-walled aircraft parts includes a clamping table 1, with fixed blocks 2 installed on both sides of the clamping table 1. A fixed fixture 3 is slidably installed on the top of the clamping table 1. A lower clamping plate 4 and a movable clamping plate 5 are slidably installed in the inner cavity of the fixed fixture 3. A soft pad 6 is installed on both the lower clamping plate 4 and the movable clamping plate 5. A pressure sensor 7 is installed at the bottom of the lower clamping plate 4 in the inner cavity of the fixed fixture 3. A microcontroller 8 and a prompter 9 are installed on the top of the fixed fixture 3. The pressure sensor 7 is electrically connected to the microcontroller 8 and the prompter 9.

[0032] A pressure screw 10 is screwed into the fixed clamp 3. The end of the pressure screw 10 is connected to the movable clamp 5. The pressure screw 10 passes through the upper part of the fixed clamp 3 and a rotating block 11 is installed on the top.

[0033] The movable clamping plate 5 is provided with a positioning groove 12, and a positioning rotating ring 13 is fixedly sleeved on the pressure screw 10. The positioning rotating ring 13 is rotatably installed in the positioning groove 12.

[0034] Example 4 A CNC machining anti-deformation clamping device for thin-walled aircraft parts includes a clamping table 1, with fixed blocks 2 installed on both sides of the clamping table 1. A fixed fixture 3 is slidably installed on the top of the clamping table 1. A lower clamping plate 4 and a movable clamping plate 5 are slidably installed in the inner cavity of the fixed fixture 3. A soft pad 6 is installed on both the lower clamping plate 4 and the movable clamping plate 5. A pressure sensor 7 is installed at the bottom of the lower clamping plate 4 in the inner cavity of the fixed fixture 3. A microcontroller 8 and a prompter 9 are installed on the top of the fixed fixture 3. The pressure sensor 7 is electrically connected to the microcontroller 8 and the prompter 9.

[0035] A pressure screw 10 is screwed into the fixed clamp 3. The end of the pressure screw 10 is connected to the movable clamp 5. The pressure screw 10 passes through the upper part of the fixed clamp 3 and a rotating block 11 is installed on the top.

[0036] The movable clamping plate 5 is provided with a positioning groove 12, and a positioning rotating ring 13 is fixedly sleeved on the pressure screw 10. The positioning rotating ring 13 is rotatably installed in the positioning groove 12.

[0037] The clamping table 1 is provided with a T-shaped guide groove 14, and a T-shaped guide rod 15 is slidably installed in the T-shaped guide groove 14. The T-shaped guide rod 15 is installed at the bottom of the fixed clamp 3.

[0038] A pull rod 16 is rotatably mounted on the T-shaped guide rod 15, and a rotating rod 17 is rotatably mounted on the other end of the pull rod 16. A support plate 18 is installed inside the clamping table 1, and a rotating shaft 19 is installed in the middle of the rotating rod 17. The rotating shaft 19 passes through the support plate 18 and is rotatably mounted inside it.

[0039] Example 5 A CNC machining anti-deformation clamping device for thin-walled aircraft parts includes a clamping table 1, with fixed blocks 2 installed on both sides of the clamping table 1. A fixed fixture 3 is slidably installed on the top of the clamping table 1. A lower clamping plate 4 and a movable clamping plate 5 are slidably installed in the inner cavity of the fixed fixture 3. A soft pad 6 is installed on both the lower clamping plate 4 and the movable clamping plate 5. A pressure sensor 7 is installed at the bottom of the lower clamping plate 4 in the inner cavity of the fixed fixture 3. A microcontroller 8 and a prompter 9 are installed on the top of the fixed fixture 3. The pressure sensor 7 is electrically connected to the microcontroller 8 and the prompter 9.

[0040] A pressure screw 10 is screwed into the fixed clamp 3. The end of the pressure screw 10 is connected to the movable clamp 5. The pressure screw 10 passes through the upper part of the fixed clamp 3 and a rotating block 11 is installed on the top.

[0041] The movable clamping plate 5 is provided with a positioning groove 12, and a positioning rotating ring 13 is fixedly sleeved on the pressure screw 10. The positioning rotating ring 13 is rotatably installed in the positioning groove 12.

[0042] The clamping table 1 is provided with a T-shaped guide groove 14, and a T-shaped guide rod 15 is slidably installed in the T-shaped guide groove 14. The T-shaped guide rod 15 is installed at the bottom of the fixed clamp 3.

[0043] A pull rod 16 is rotatably mounted on the T-shaped guide rod 15, and a rotating rod 17 is rotatably mounted on the other end of the pull rod 16. A support plate 18 is installed inside the clamping table 1, and a rotating shaft 19 is installed in the middle of the rotating rod 17. The rotating shaft 19 passes through the support plate 18 and is rotatably mounted inside it.

[0044] A ratchet 20 is fixedly sleeved on the rotating shaft 19, and a pawl 21 is rotatably mounted on the support plate 18. The pawl 21 is engaged in the tooth gap of the ratchet 20.

[0045] A first torsion spring 22 is installed at the connection between the support plate 18 and the pawl 21, and a second torsion spring 23 is installed at the connection between the support plate 18 and the ratchet 20.

[0046] Example 6 A CNC machining anti-deformation clamping device for thin-walled aircraft parts includes a clamping table 1, with fixed blocks 2 installed on both sides of the clamping table 1. A fixed fixture 3 is slidably installed on the top of the clamping table 1. A lower clamping plate 4 and a movable clamping plate 5 are slidably installed in the inner cavity of the fixed fixture 3. A soft pad 6 is installed on both the lower clamping plate 4 and the movable clamping plate 5. A pressure sensor 7 is installed at the bottom of the lower clamping plate 4 in the inner cavity of the fixed fixture 3. A microcontroller 8 and a prompter 9 are installed on the top of the fixed fixture 3. The pressure sensor 7 is electrically connected to the microcontroller 8 and the prompter 9.

[0047] A pressure screw 10 is screwed into the fixed clamp 3. The end of the pressure screw 10 is connected to the movable clamp 5. The pressure screw 10 passes through the upper part of the fixed clamp 3 and a rotating block 11 is installed on the top.

[0048] The movable clamping plate 5 is provided with a positioning groove 12, and a positioning rotating ring 13 is fixedly sleeved on the pressure screw 10. The positioning rotating ring 13 is rotatably installed in the positioning groove 12.

[0049] The clamping table 1 is provided with a T-shaped guide groove 14, and a T-shaped guide rod 15 is slidably installed in the T-shaped guide groove 14. The T-shaped guide rod 15 is installed at the bottom of the fixed clamp 3.

[0050] A pull rod 16 is rotatably mounted on the T-shaped guide rod 15, and a rotating rod 17 is rotatably mounted on the other end of the pull rod 16. A support plate 18 is installed inside the clamping table 1, and a rotating shaft 19 is installed in the middle of the rotating rod 17. The rotating shaft 19 passes through the support plate 18 and is rotatably mounted inside it.

[0051] A ratchet 20 is fixedly sleeved on the rotating shaft 19, and a pawl 21 is rotatably mounted on the support plate 18. The pawl 21 is engaged in the tooth gap of the ratchet 20.

[0052] A first torsion spring 22 is installed at the connection between the support plate 18 and the pawl 21, and a second torsion spring 23 is installed at the connection between the support plate 18 and the ratchet 20.

[0053] The lower part of the clamping table 1 has an opening 24, and the top of the rotating shaft 19 is equipped with a knob 25.

[0054] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A deformation-resistant clamping device for CNC machining of thin-walled aircraft parts, characterized in that, The device includes a clamping platform (1), with fixing blocks (2) installed on both sides of the clamping platform (1). A fixing fixture (3) is slidably installed on the top of the clamping platform (1). A lower clamping plate (4) and a movable clamping plate (5) are slidably installed in the inner cavity of the fixing fixture (3). A soft pad (6) is installed on both the lower clamping plate (4) and the movable clamping plate (5). A pressure sensor (7) is installed at the bottom of the lower clamping plate (4) in the inner cavity of the fixing fixture (3). A microcontroller (8) and a prompter (9) are installed on the top of the fixing fixture (3). The pressure sensor (7) is electrically connected to the microcontroller (8) and the prompter (9).

2. The anti-deformation clamping device for CNC machining of thin-walled aircraft parts according to claim 1, characterized in that, The fixing clamp (3) is screwed with a pressure screw (10), the end of which is connected to the movable clamp (5). The pressure screw (10) passes through the upper part of the fixing clamp (3) and a rotating block (11) is installed on the top.

3. The anti-deformation clamping device for CNC machining of thin-walled aircraft parts according to claim 2, characterized in that, The movable clamp (5) is provided with a positioning groove (12), and a positioning ring (13) is fixedly sleeved on the pressure screw (10). The positioning ring (13) is rotatably installed in the positioning groove (12).

4. The anti-deformation clamping device for CNC machining of thin-walled aircraft parts according to claim 3, characterized in that, The clamping platform (1) is provided with a T-shaped guide groove (14), and a T-shaped guide rod (15) is slidably installed in the T-shaped guide groove (14). The T-shaped guide rod (15) is installed at the bottom of the fixed clamp (3).

5. The anti-deformation clamping device for CNC machining of thin-walled aircraft parts according to claim 4, characterized in that, A pull rod (16) is rotatably mounted on the T-shaped guide rod (15), and a rotating rod (17) is rotatably mounted on the other end of the pull rod (16). A support plate (18) is installed inside the clamping table (1), and a rotating shaft (19) is installed in the middle of the rotating rod (17). The rotating shaft (19) passes through the support plate (18) and is rotatably mounted inside it.

6. The anti-deformation clamping device for CNC machining of thin-walled aircraft parts according to claim 5, characterized in that, A ratchet (20) is fixedly sleeved on the rotating shaft (19), and a pawl (21) is rotatably mounted on the support plate (18). The pawl (21) is engaged in the tooth gap of the ratchet (20).

7. The anti-deformation clamping device for CNC machining of thin-walled aircraft parts according to claim 6, characterized in that, A first torsion spring (22) is installed at the connection between the support plate (18) and the pawl (21), and a second torsion spring (23) is installed at the connection between the support plate (18) and the ratchet (20).

8. The anti-deformation clamping device for CNC machining of thin-walled aircraft parts according to claim 7, characterized in that, The clamping platform (1) has an opening (24) at the bottom and a knob (25) is installed at the top of the rotating shaft (19).

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