Machining clamp for elastic support of thin-wall structural part

Abstract

The invention discloses a thin-wall structural part elastic support machining clamp, and relates to the field of clamps, the thin-wall structural part elastic support machining clamp comprises a main body support and a clamping air cylinder, four air cylinder supporting structures are symmetrically and movably mounted on the main body support, and each air cylinder supporting structure is composed of a mounting square rod, a first bottom plate, a first top plate and a first spring; the first bottom plate is fixedly mounted at the lower end of the mounting square rod, the first top plate is fixedly mounted at the upper end of the mounting square rod, the mounting square rod is sleeved with the first spring, and the clamping air cylinder is fixedly mounted at the upper end of the first top plate; an elastic supporting structure composed of a mounting base rod, a second bottom plate, a second top plate, a polyurethane conical block, a second spring, an outer threaded cylinder, an annular baffle, an inner threaded ring, a contact base ring and a contact rotating roller is arranged on a main body support, and the elastic deformation characteristic of the second spring can be utilized when a thin-wall structural part is subjected to cutting force and generates a deformation trend; and adaptive reverse supporting force is provided, cutting force is effectively balanced, workpiece deformation is reduced, and machining precision is guaranteed.

Description

Technical Field

[0001] This invention relates to the field of fixtures, and in particular to a machining fixture for elastic support of thin-walled structural components. Background Technology

[0002] In the field of medical imaging equipment, large, thin-walled, high-strength precision-cast aluminum alloy structural components are widely used in CT and MRI equipment. These components require extremely thin walls, complex structures, and very high dimensional accuracy to meet the stringent requirements of lightweight, high strength, and precision assembly. During machining, the fixtures used for processing thin-walled aluminum alloy structural components are crucial for ensuring machining accuracy. They must stably hold the workpiece to prevent dimensional deviations and surface quality degradation caused by workpiece displacement or vibration during processing, thus ensuring that the final product meets the assembly and performance requirements of the medical imaging equipment.

[0003] However, existing fixtures for machining thin-walled aluminum alloy structural parts have significant technical defects in practical applications. When the cutting tool applies cutting force to the thin-walled aluminum alloy structural part, the thin-walled structure is prone to significant deformation due to insufficient rigidity. The support structure of traditional fixtures is mostly rigidly fixed, which cannot provide adaptive reverse support force according to the deformation of the workpiece, making it difficult to effectively balance the cutting force. This results in the workpiece deformation exceeding the allowable range, affecting machining accuracy. Therefore, this application proposes a machining fixture with elastic support for thin-walled structural parts to solve the above problems. Summary of the Invention

[0004] The main objective of this invention is to provide a machining fixture for elastic support of thin-walled structural components, which can effectively solve the problems in the background art.

[0005] To achieve the above objectives, the technical solution adopted by the present invention is as follows: A machining fixture for elastic support of thin-walled structural components includes a main support frame and clamping cylinders. Four cylinder support structures are symmetrically and movably mounted on the main support frame. Each cylinder support structure consists of a mounting rod, a first base plate, a first top plate, and a first spring. The first base plate is fixedly mounted on the lower end of the mounting rod, the first top plate is fixedly mounted on the upper end of the mounting rod, and the first spring is sleeved on the mounting rod. The clamping cylinders are fixedly mounted on the upper end of the first top plate. An adjustable limiting structure is fixedly mounted on the main support frame and between the four cylinder support structures. The adjustable limiting structure consists of a limiting baffle, connecting plates, connecting blocks, internal threaded cylinders, threaded columns, and a mounting base plate. Two connecting plates are symmetrically fixedly mounted at both ends of the limiting baffle. Two connecting blocks are respectively fixedly mounted on the lower ends of two connecting plates. Two internal threaded cylinders are respectively rotatably mounted on two connecting blocks. Two threaded columns are respectively installed inside two internal threaded cylinders. Two mounting base plates are respectively fixedly mounted on the lower ends of two threaded columns. The main support frame is movably mounted with several elastic support structures within an adjustable limiting structure. Each elastic support structure comprises a mounting base rod, a second base plate, a second top plate, a polyurethane cone block, a second spring, an external threaded cylinder, an annular baffle, an internal threaded ring, a contact base ring, and contact rollers. The second base plate is fixedly mounted at the lower end of the mounting base rod, the second top plate is fixedly mounted at the upper end of the mounting base rod, the polyurethane cone block is fixedly mounted at the upper end of the second top plate, the second spring is sleeved on the mounting base rod, the annular baffle is fixedly mounted at the lower end of the external threaded cylinder, both the annular baffle and the external threaded cylinder are movably sleeved on the mounting base rod, with the annular baffle located below the second spring and the external threaded cylinder located inside the second spring. The internal threaded ring is threadedly mounted on the external threaded cylinder and is simultaneously located between the second spring and the annular baffle. The contact base ring is fixedly mounted at the lower end of the second spring and is simultaneously movably sleeved outside the external threaded cylinder. Several contact rollers are rotatably mounted within the contact base rings.

[0006] Preferably, the main support frame consists of an upper base plate, support columns, a lower base plate, and U-shaped mounting brackets. There are four support columns, which are symmetrically and fixedly installed at the lower end of the upper base plate. The lower base plate is fixedly installed at the lower end of the four support columns. There are two U-shaped mounting brackets, which are symmetrically and fixedly installed at the upper end of the upper base plate.

[0007] Preferably, the upper base plate of the main support has a plurality of mounting through holes between the two U-shaped mounting brackets, the mounting through holes penetrating the upper base plate vertically, and two symmetrical mounting square holes are provided on the upper side wall of the U-shaped mounting bracket, the mounting square holes penetrating the upper side wall of the U-shaped mounting bracket vertically.

[0008] Preferably, the mounting rod on the cylinder support structure is slidably mounted in the mounting hole opened on the side wall of the U-shaped mounting bracket, the first bottom plate is located inside the U-shaped mounting bracket, and the first spring and the first top plate are both located above the U-shaped mounting bracket.

[0009] Preferably, the clamping cylinder includes a cylinder body, a clamping plate is fixedly installed on the inner end of the piston rod of the cylinder body, a rubber anti-slip pad is fixedly installed on the inner end of the clamping plate, and the cylinder body is fixedly installed on the upper end of the first top plate.

[0010] Preferably, the adjustable limiting structure is located between two U-shaped mounting brackets, the mounting base plate is fixedly mounted on the upper end of the upper base plate on the main support, and the limiting baffle is provided with a plurality of fitting through holes, the fitting through holes passing through the limiting baffle from top to bottom, and the fitting through holes are coaxial with the mounting through holes provided on the upper base plate.

[0011] Preferably, the elastic support structure passes through the through hole in the limiting baffle, and the height of the elastic support structure is the same as the height of the clamping plate and the rubber anti-slip pad. The mounting base rod is slidably mounted in the mounting through hole in the upper base plate. The second bottom plate is located below the upper base plate, and the second top plate, polyurethane cone, second spring, external threaded cylinder, annular baffle, internal threaded ring, contact base ring and contact roller are all located above the upper base plate.

[0012] Preferably, the upper end of the internal threaded ring is provided with an annular guide groove, and the lower end of the contact base ring is provided with a plurality of roller grooves in an annular shape. The contact roller is rotatably installed in the roller grooves, and the contact roller is simultaneously movably installed in the annular guide grooves.

[0013] Compared with the prior art, the present invention has the following beneficial effects: (1) By setting an elastic support structure consisting of a mounting base rod, a second base plate, a second top plate, a polyurethane cone block, a second spring, an external threaded cylinder, an annular baffle, an internal threaded ring, a contact base ring, and a contact roller on the main support, the elastic deformation characteristics of the second spring can be utilized to provide an adaptive reverse support force when the thin-walled structural parts are subjected to cutting force and have a tendency to deform, effectively balancing the cutting force, reducing workpiece deformation, and ensuring machining accuracy.

[0014] (2) The presence of the external threaded cylinder, the annular baffle, and the internal threaded ring can adjust the preload of the second spring. By rotating the internal threaded ring, it can move up and down along the external threaded cylinder, thereby changing the degree of compression of the second spring. Thus, the size of the elastic support force can be flexibly adjusted according to the material, thickness, and processing requirements of different thin-walled structural parts, enhancing the versatility and applicability of the fixture.

[0015] (3) The presence of the contact base ring and the contact roller can reduce the resistance caused by the elastic reaction force of the second spring to the rotation of the internal thread ring. When the internal thread ring is rotated, the contact roller rolls in the annular guide groove, making the adjustment operation of the internal thread ring more effortless and smooth, and facilitating the quick and accurate adjustment of the preload of the second spring.

[0016] (4) By setting a cylinder support structure consisting of a mounting square rod, a first base plate, a first top plate and a first spring on the main support, and setting the clamping cylinder on the main support, the clamping cylinder can move up and down with the workpiece being clamped. When the thin-walled structural part undergoes a slight up and down displacement due to force during processing, the clamping cylinder can slide synchronously in the mounting square hole of the U-shaped mounting bracket through the mounting square rod. With the elastic extension and contraction characteristics of the first spring, it can always maintain a stable clamping force on the workpiece, avoiding the impact on processing accuracy caused by workpiece displacement, clamping loosening or sudden change in clamping force. Moreover, this follow-up clamping design can effectively buffer the vertical impact force generated during processing, reduce the local stress concentration of the workpiece caused by rigid clamping, prevent cracks or deformation of the thin-walled structural part, and further improve the adaptability and safety of the fixture for processing thin-walled structural parts.

[0017] (5) By setting an adjustable limiting structure consisting of a limiting baffle, a connecting plate, a connecting block, an internal threaded cylinder, a threaded column and a mounting base plate, the longitudinal movement range of the workpiece can be limited, so that the longitudinal movement range of the workpiece is within the allowable range of machining accuracy. This ensures that the workpiece will not have longitudinal displacement exceeding the allowable range due to cutting force or vibration during machining, effectively avoiding machining size deviation caused by excessive movement, and ultimately enhancing the stability of the machining process and ensuring the machining quality of thin-walled structural parts. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the main support structure of the present invention; Figure 3 This is a schematic diagram showing the positional relationship between the cylinder support structure and the clamping cylinder of the present invention. Figure 4 This is an exploded view of the adjustable limiting structure of the present invention; Figure 5 This is a cross-sectional view of the elastic support structure of the present invention; Figure 6 This is a schematic diagram of the structure of the external threaded cylinder and the internal threaded ring after separation according to the present invention; Figure 7 This is a schematic diagram of the structure of the contact base ring and the contact roller after separation according to the present invention.

[0019] In the diagram: 1. Main support frame; 2. Cylinder support structure; 3. Clamping cylinder; 4. Adjustable limiting structure; 5. Elastic support structure; 6. Upper base plate; 7. Support column; 8. Lower base plate; 9. U-shaped mounting bracket; 10. Mounting square hole; 11. Mounting square rod; 12. First base plate; 13. First top plate; 14. First spring; 15. Cylinder body; 16. Clamping plate; 17. Rubber anti-slip pad; 18. Limiting baffle; 19. 20. Connecting plate; 21. Connecting block; 22. Through hole; 23. Threaded cylinder; 24. Threaded column; 25. Mounting base plate; 26. Mounting base rod; 27. Second base plate; 28. Second top plate; 29. ​​Polyurethane cone block; 30. Second spring; 31. Threaded cylinder; 32. Annular baffle; 33. Threaded ring; 34. Annular guide groove; 35. Contact base ring; 36. Roller groove; 37. Contact roller; 38. Mounting through hole. Detailed Implementation

[0020] To make the technical means, creative features, objectives and effects of this invention easier to understand, the invention will be further described below in conjunction with specific embodiments.

[0021] Please see Figure 1 - Figure 7As shown, a machining fixture for elastic support of thin-walled structural components includes a main support 1 and clamping cylinders 3. Four cylinder support structures 2 are symmetrically and movably mounted on the main support 1. Each cylinder support structure 2 consists of a mounting rod 11, a first base plate 12, a first top plate 13, and a first spring 14. The first base plate 12 is fixedly mounted on the lower end of the mounting rod 11, the first top plate 13 is fixedly mounted on the upper end of the mounting rod 11, the first spring 14 is sleeved on the mounting rod 11, and the clamping cylinders 3 are fixedly mounted on the upper end of the first top plate 13. An adjustable limiting structure 4 is fixedly mounted on the main support 1 and between the four cylinder support structures 2. The adjustable limiting structure 4 consists of a limiting baffle 18, a connecting plate 19, a connecting block 20, an internal threaded cylinder 22, and a threaded... The system comprises a column 23 and a mounting base plate 24. Two connecting plates 19 are symmetrically fixed at both ends of the limiting baffle 18. Two connecting blocks 20 are fixedly installed at the lower ends of the two connecting plates 19. Two internal threaded cylinders 22 are rotatably mounted on the two connecting blocks 20. Two threaded columns 23 are installed inside the two internal threaded cylinders 22. Two mounting base plates 24 are fixedly installed at the lower ends of the two threaded columns 23. Several elastic support structures 5 are movably installed on the main support 1 within the adjustable limiting structure 4. Each elastic support structure 5 includes a mounting base rod 25, a second base plate 26, a second top plate 27, a polyurethane cone block 28, a second spring 29, an external threaded cylinder 30, an annular baffle 31, an internal threaded ring 32, and a contact base ring. The system consists of a 34 and a contact roller 36. A second base plate 26 is fixedly installed at the lower end of the mounting base rod 25. A second top plate 27 is fixedly installed at the upper end of the mounting base rod 25. A polyurethane cone block 28 is fixedly installed at the upper end of the second top plate 27. A second spring 29 is sleeved on the mounting base rod 25. An annular baffle 31 is fixedly installed at the lower end of the external threaded cylinder 30. Both the annular baffle 31 and the external threaded cylinder 30 are movably sleeved on the mounting base rod 25, with the annular baffle 31 located below the second spring 29 and the external threaded cylinder 30 located inside the second spring 29. An internal threaded ring 32 is threadedly installed on the external threaded cylinder 30, and the internal threaded ring 32 is simultaneously located between the second spring 29 and the annular baffle 31. A contact base ring 34 is fixedly installed at the lower end of the second spring 29. The contact base ring 34 is simultaneously movably sleeved on the outside of the external threaded cylinder 30. Several contact rollers 36 are installed inside the contact base ring 34 in a ring-shaped rotation. The main support 1 consists of an upper base plate 6, support columns 7, a lower base plate 8, and U-shaped mounting brackets 9. There are four support columns 7, which are symmetrically fixedly installed at the lower end of the upper base plate 6. The lower base plate 8 is fixedly installed at the lower end of the four support columns 7. There are two U-shaped mounting brackets 9, which are symmetrically fixedly installed at the upper end of the upper base plate 6. Several mounting through holes 37 are opened on the upper base plate 6 of the main support 1 and between the two U-shaped mounting brackets 9. The mounting through holes 37 pass through the upper base plate 6 vertically. Two mounting square holes 10 are symmetrically opened on the upper side wall of the U-shaped mounting bracket 9. The mounting square holes 10 pass through the upper side wall of the U-shaped mounting bracket 9 vertically.The mounting rod 11 on the cylinder support structure 2 is slidably mounted in the mounting square hole 10 opened on the upper side wall of the U-shaped mounting bracket 9. The first base plate 12 is located inside the U-shaped mounting bracket 9. The first spring 14 and the first top plate 13 are both located above the U-shaped mounting bracket 9. The clamping cylinder 3 includes a cylinder body 15. A clamping plate 16 is fixedly mounted on the inner end of the piston rod of the cylinder body 15. A rubber anti-slip pad 17 is fixedly mounted on the inner end of the clamping plate 16. The cylinder body 15 is fixedly mounted on the upper end of the first top plate 13. By setting the cylinder support structure 2, which consists of the mounting rod 11, the first base plate 12, the first top plate 13 and the first spring 14, on the main body bracket 1, and simultaneously setting the clamping cylinder 3 on the main body bracket 1, the clamping cylinder 3 is mounted on the main body bracket 1. On the bracket 1, the clamping cylinder 3 can move up and down with the workpiece being clamped. When the thin-walled structural part experiences slight vertical displacement due to force during processing, the clamping cylinder 3 can slide synchronously within the mounting square hole 10 of the U-shaped mounting bracket 9 via the mounting square rod 11. Combined with the elastic extension and contraction characteristics of the first spring 14, it maintains a stable clamping force on the workpiece, preventing loosening of the clamping or sudden changes in clamping force due to workpiece displacement, which could affect processing accuracy. Furthermore, this follow-up clamping design effectively buffers the vertical impact force generated during processing, reduces local stress concentration on the workpiece caused by rigid clamping, and prevents cracks or deformation of the thin-walled structural part, further improving the adaptability and safety of the fixture during the processing of thin-walled structural parts.

[0022] Specifically, the adjustable limiting structure 4 is located between two U-shaped mounting brackets 9. The mounting base plate 24 is fixedly mounted on the upper end of the upper base plate 6 on the main support 1. The limiting baffle 18 has several through holes 21, which pass through the limiting baffle 18 vertically. The through holes 21 are coaxial with the mounting through holes 37 on the upper base plate 6. By setting the adjustable limiting structure 4, which consists of the limiting baffle 18, connecting plate 19, connecting block 20, internal threaded cylinder 22, threaded column 23 and mounting base plate 24, the longitudinal movement range of the workpiece can be limited, so that the longitudinal movement range of the workpiece is within the allowable range of machining accuracy. This ensures that the workpiece will not have longitudinal displacement exceeding the allowable range due to cutting force or vibration during machining, effectively avoiding machining size deviation caused by excessive movement, and ultimately enhancing the stability of the machining process and ensuring the machining quality of thin-walled structural parts.

[0023] Specifically, the elastic support structure 5 passes through the through hole 21 opened on the limiting baffle 18. The height of the elastic support structure 5 is the same as the height of the clamping plate 16 and the rubber anti-slip pad 17. The mounting base rod 25 is slidably installed in the mounting through hole 37 opened on the upper base plate 6. The second bottom plate 26 is located below the upper base plate 6. The second top plate 27, polyurethane cone block 28, second spring 29, external threaded cylinder 30, annular baffle 31, internal threaded ring 32, contact base ring 34, and contact roller 36 are all positioned... Above the upper substrate 6, an annular guide groove 33 is formed at the upper end of the internal threaded ring 32, and several roller grooves 35 are formed in an annular shape at the lower end of the contact base ring 34. The contact roller 36 is rotatably installed in the roller grooves 35 and simultaneously movably installed in the annular guide groove 33. The main body support 1 is equipped with a mounting base rod 25, a second base plate 26, a second top plate 27, a polyurethane cone block 28, a second spring 29, an external threaded cylinder 30, an annular baffle 31, an internal threaded ring 32, a contact base ring 34, and a... The elastic support structure 5, composed of contact rollers 36, can utilize the elastic deformation characteristics of the second spring 29 to provide adaptive reverse support force when thin-walled structural parts are subjected to cutting forces and tend to deform, effectively balancing the cutting force, reducing workpiece deformation, and ensuring machining accuracy. The presence of the external threaded cylinder 30, the annular baffle 31, and the internal threaded ring 32 can adjust the preload of the second spring 29. By rotating the internal threaded ring 32, it moves up and down along the external threaded cylinder 30, changing the degree of compression on the second spring 29. Thus, the magnitude of the elastic support force can be flexibly adjusted according to the material, thickness, and machining requirements of different thin-walled structural parts, enhancing the versatility and applicability of the fixture. The presence of the contact base ring 34 and the contact rollers 36 can reduce the resistance caused by the elastic reaction force of the second spring 29 on the rotation of the internal threaded ring 32. When the internal threaded ring 32 is rotated, the contact rollers 36 roll in the annular guide groove 33, making the adjustment operation of the internal threaded ring 32 more effortless and smooth, and facilitating the quick and accurate adjustment of the preload of the second spring 29.

[0024] In use, the preload of the second spring 29 is first adjusted according to the size and processing requirements of the thin-walled structural component. The purpose of adjusting the preload of the second spring 29 is to flexibly change the magnitude of the elastic support force according to the material, thickness and processing requirements of different thin-walled structural components, so as to ensure that a suitable reverse support force can be provided when the thin-walled structural component is subjected to cutting force, thereby enhancing the versatility and applicability of the fixture. Specifically, the internal threaded ring 32 is rotated to move up and down along the external threaded cylinder 30. At this time, the contact roller 36 and the internal threaded ring 32 generate friction and will rotate within the roller groove 35, thereby reducing the resistance to the rotation of the internal threaded ring 32. By changing the compression of the internal threaded ring 32 on the second spring 29, the pressure is reduced. The preload is adjusted by adjusting the degree of preload; then, the height of the limiting baffle 18 is adjusted according to the allowable range of machining accuracy of the thin-walled structural parts, that is, the distance between the upper end of the limiting baffle 18 and the top of the elastic support structure 5 is adjusted. The purpose of adjusting this distance is to limit the longitudinal movement range of the workpiece, so that the longitudinal movement range of the workpiece is controlled within the allowable range of machining accuracy, and to prevent the longitudinal displacement of the workpiece from exceeding the allowable range due to cutting force or vibration, which would affect the machining dimensional accuracy. During operation, the two internal threaded cylinders 22 are rotated at the same time, so that the two internal threaded cylinders 22 move up and down along the two threaded columns 23 respectively. Thus, the internal threaded cylinders 22 will drive the connecting plate 19 and the limiting baffle 18 through the connecting block 20. The components move synchronously until the limiting baffle 18 reaches the required height. Then, the thin-walled structural member is placed on top of the polyurethane cone 28 on several elastic support structures 5. Next, the cylinder body 15 of the clamping cylinder 3 is activated, extending its piston rod. This pushes the clamping plate 16 and the rubber anti-slip pad 17 inwards until the rubber anti-slip pad 17 tightly contacts and clamps the thin-walled structural member. At this time, the first spring 14 is in its natural or slightly compressed state. Finally, during the cutting process of the thin-walled structural member, when the thin-walled structural member is subjected to cutting force and exhibits a downward deformation tendency, the thin-walled structural member will press downwards against the polyurethane cone 28 and the second top plate 27, thereby... The moving mounting base rod 25 slides downward along the mounting through hole 37, and at the same time the second top plate 27 compresses the second spring 29. At this time, the second spring 29 generates an upward elastic force to balance the cutting force. When the thin-walled structural part tends to deform, due to the friction between the rubber anti-slip pad 17 and the thin-walled structural part, the clamping cylinder 3 will move up and down with the slight vertical displacement of the thin-walled structural part. At this time, the mounting square rod 11 will slide synchronously along the mounting square hole 10, and the first spring 14 will generate corresponding extension and contraction, thereby ensuring a stable clamping force on the workpiece. When the thin-walled structural part moves downward, it will be blocked by the limiting baffle 18 to ensure that its movement range is within the allowable range of machining accuracy.

[0025] Obviously, the above embodiments are merely illustrative examples for clear explanation and are not intended to limit the implementation. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. However, obvious variations or modifications derived therefrom are still within the scope of protection of this invention.

Claims

1. A machining fixture for elastic support of thin-walled structural components, comprising a main support (1) and a clamping cylinder (3), characterized in that: Four cylinder support structures (2) are symmetrically and movably installed on the main support (1). Each cylinder support structure (2) consists of a mounting rod (11), a first base plate (12), a first top plate (13), and a first spring (14). The first base plate (12) is fixedly installed at the lower end of the mounting rod (11), the first top plate (13) is fixedly installed at the upper end of the mounting rod (11), and the first spring (14) is sleeved on the mounting rod (11). The clamping cylinder (3) is fixedly installed at the upper end of the first top plate (13). An adjustable limiting structure (4) is fixedly installed on the main support (1) and between the four cylinder support structures (2). The adjustable limiting structure (4) consists of a limiting... The system comprises a baffle (18), a connecting plate (19), a connecting block (20), an internal threaded cylinder (22), a threaded post (23), and a mounting base (24). Two connecting plates (19) are symmetrically fixed at both ends of the limiting baffle (18). Two connecting blocks (20) are fixedly installed at the lower ends of the two connecting plates (19). Two internal threaded cylinders (22) are rotatably mounted on the two connecting blocks (20). Two threaded posts (23) are installed inside the two internal threaded cylinders (22). Two mounting bases (24) are fixedly installed at the lower ends of the two threaded posts (23). Several... An elastic support structure (5) is provided, comprising a mounting base rod (25), a second base plate (26), a second top plate (27), a polyurethane cone block (28), a second spring (29), an external threaded cylinder (30), an annular baffle (31), an internal threaded ring (32), a contact base ring (34), and a contact roller (36). The second base plate (26) is fixedly installed at the lower end of the mounting base rod (25), the second top plate (27) is fixedly installed at the upper end of the mounting base rod (25), the polyurethane cone block (28) is fixedly installed at the upper end of the second top plate (27), the second spring (29) is sleeved on the mounting base rod (25), and the annular baffle (31) is fixedly installed on the external threaded cylinder. At the lower end of the cylinder (30), the annular baffle (31) and the external threaded cylinder (30) are both movably sleeved on the mounting base rod (25), and the annular baffle (31) is located below the second spring (29). The external threaded cylinder (30) is located inside the second spring (29). The internal threaded ring (32) is threadedly installed on the external threaded cylinder (30). The internal threaded ring (32) is located between the second spring (29) and the annular baffle (31). The contact base ring (34) is fixedly installed at the lower end of the second spring (29). The contact base ring (34) is movably sleeved on the outside of the external threaded cylinder (30). There are several contact rollers (36) installed in the contact base ring (34) in a ring rotation.

2. The machining fixture for elastic support of thin-walled structural components according to claim 1, characterized in that: The main support (1) consists of an upper base plate (6), support columns (7), a lower base plate (8) and a U-shaped mounting bracket (9). There are four support columns (7) that are symmetrically fixedly installed at the lower end of the upper base plate (6). The lower base plate (8) is fixedly installed at the lower end of the four support columns (7). There are two U-shaped mounting brackets (9) that are symmetrically fixedly installed at the upper end of the upper base plate (6).

3. The machining fixture for elastic support of thin-walled structural components according to claim 2, characterized in that: The main support (1) has several mounting through holes (37) on the upper base plate (6) and between the two U-shaped mounting brackets (9). The mounting through holes (37) pass through the upper base plate (6) vertically. The upper side wall of the U-shaped mounting bracket (9) has two symmetrical mounting square holes (10). The mounting square holes (10) pass through the upper side wall of the U-shaped mounting bracket (9) vertically.

4. The machining fixture for elastic support of thin-walled structural components according to claim 3, characterized in that: The mounting rod (11) on the cylinder support structure (2) is slidably mounted in the mounting hole (10) opened on the upper side wall of the U-shaped mounting bracket (9). The first bottom plate (12) is located inside the U-shaped mounting bracket (9). The first spring (14) and the first top plate (13) are both located above the U-shaped mounting bracket (9).

5. The machining fixture for elastic support of thin-walled structural components according to claim 4, characterized in that: The clamping cylinder (3) includes a cylinder body (15), and a clamping plate (16) is fixedly installed on the inner end of the piston rod of the cylinder body (15). A rubber anti-slip pad (17) is fixedly installed on the inner end of the clamping plate (16). The cylinder body (15) is fixedly installed on the upper end of the first top plate (13).

6. The machining fixture for elastic support of thin-walled structural components according to claim 5, characterized in that: The adjustable limiting structure (4) is located between two U-shaped mounting brackets (9). The mounting base plate (24) is fixedly mounted on the upper end of the upper base plate (6) on the main support (1). The limiting baffle (18) has several fitting through holes (21). The fitting through holes (21) pass through the limiting baffle (18) vertically, and the fitting through holes (21) are coaxial with the mounting through holes (37) opened on the upper base plate (6).

7. A machining fixture for elastic support of thin-walled structural components according to claim 6, characterized in that: The elastic support structure (5) passes through the fitting through hole (21) opened on the limiting baffle (18). The height of the elastic support structure (5) is the same as the height of the clamping plate (16) and the rubber anti-slip pad (17). The mounting base rod (25) slides up and down in the mounting through hole (37) opened on the upper base plate (6). The second bottom plate (26) is located below the upper base plate (6). The second top plate (27), polyurethane cone (28), second spring (29), external threaded cylinder (30), annular baffle (31), internal threaded ring (32), contact base ring (34) and contact roller (36) are all located above the upper base plate (6).

8. A machining fixture for elastic support of thin-walled structural components according to claim 7, characterized in that: The upper end of the internal threaded ring (32) is provided with an annular guide groove (33), and the lower end of the contact base ring (34) is provided with a plurality of roller grooves (35) in an annular shape. The contact roller (36) is rotatably installed in the roller groove (35), and the contact roller (36) is simultaneously movably installed in the annular guide groove (33).

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