A clamping fixture, forming system and method for forming complex thin-walled components

Abstract

The application discloses a clamping tool, a forming system and a method for forming a complex thin-walled component, and the tool realizes the combination of two machining processes through a hydraulic telescopic clamp and a movable frame clamp, combines the high-efficiency deformation capacity of the stretch forming and the fine forming capacity of the double-sided incremental forming, and solves the problems of high production cost, long production time, poor stretch forming detail processing capacity, and unsuitability of the double-sided incremental forming to mass production. In the machining process, the hydraulic telescopic clamp is arranged on the stretch forming equipment and cooperates with the movable frame clamp to realize the switching of the fixing and the movement state of the plate. The movable frame clamp clamps the plate to move together, realizes the switching of the two machining processes, and improves the forming limit of the plate and keeps the processing deformation of the plate from being damaged by relying on the flexible clamping and the structural rigidity of the movable frame clamp.

Description

Technical Field

[0001] The present invention belongs to the field of complex thin-walled component stretch forming and double-sided incremental forming composite processing, and specifically designs a clamping tool that can realize high-precision batch processing of complex thin-walled components, and a forming system and method including the tool. Background Art

[0002] Incremental forming is widely used in the manufacturing of complex shapes and customized parts. Double-sided incremental forming improves single-point incremental forming, increasing machining accuracy. However, it still suffers from low machining accuracy and is unsuitable for mass production. Stretch forming is an efficient and precise manufacturing process that applies a tensile force to a metal sheet through a die, forming it into the desired shape within the die cavity. While it offers high production efficiency and is suitable for mass production, it suffers from limited machining flexibility and low material utilization.

[0003] When manufacturing thin-walled components with complex shapes, the stretch forming-double-sided incremental forming composite processing technology is adopted. It can combine the high efficiency and precision of stretch forming with the flexibility and low mold cost of incremental forming, achieving a perfect balance between high-precision rough forming and personalized detail adjustment, which is suitable for the efficient manufacturing and customized production of complex parts.

[0004] At present, the main domestic stretch-incremental forming composite forming device is patent CN103599982B. This patent discloses a multi-point die pre-stretching and progressive composite forming method and forming device for sheet metal. This device can complete the composite forming process of stretch forming and progressive forming of complex thin-walled components. However, the fixture in the stretch forming process is not movable, the stretch forming limit angle is small, and the fixture has poor retention force to prevent deformation of the thin-walled parts when it moves while clamping them. The subsequent progressive forming process adopts a single-point progressive forming process, resulting in low forming accuracy. Summary of the Invention

[0005] In order to realize the composite processing scheme of stretch forming and double-sided progressive forming and solve the problems existing in the existing composite processing devices, the high efficiency and precision of stretch forming and the flexibility and low mold cost of progressive forming are combined to realize the combination of high-precision rough forming and personalized detail adjustment, and to carry out efficient manufacturing and customized production of complex parts. The present invention provides a clamping tool, forming system and method for the forming of complex thin-walled components, which can realize stretch forming and double-sided progressive forming processing in sequence; can realize 0-90 degree rotation of thin-walled components during stretch forming processing; can realize the maintenance of the processed deformation of thin-walled components when switching between two processing steps.

[0006] In order to achieve the above functions, the present invention adopts the following technical solutions:

[0007] In a first aspect, the present invention provides a clamping fixture for forming complex thin-walled components, comprising a base, side panels disposed on two opposing sides of the base, and hydraulic drive devices disposed oppositely on the two side panels; the hydraulic drive devices drive a hydraulic telescopic clamp to move up and down, the hydraulic telescopic clamp being used to clamp a movable frame-type clamp; the movable frame-type clamp comprising a rigid frame, a movable flexible clamp, a frame X-direction feed structure, a frame Z-direction feed structure, and connecting ears;

[0008] A movable flexible clamp is respectively installed on two opposite side plates of the rigid frame, and a connecting ear is provided at one end of the two side plates, and the connecting ear is connected to the rotating rod of the frame Z-direction feed structure. The rigid frame is also connected to the frame Z-direction feed structure by a pull rope, so that the rigid frame can clamp the workpiece and flip it from a horizontal state to a vertical state. The frame X-direction feed structure drives the frame Z-direction feed structure to move to a suitable processing position in the horizontal plane of the base;

[0009] The stretching hydraulic drive device drives the hydraulic telescopic clamp to clamp the thin-walled component and press it downward, forming it into the approximate shape required by the thin-walled component on the flexible forming mold.

[0010] As a further technical solution, the movable flexible clamp includes a sleeve clamp, a rotating shaft, a quick clamping structure and a driving device; the sleeve clamp is sleeved on the rotating shaft, a driving device is provided at one end of the rotating shaft, and the quick clamping structure on the sleeve clamp is used for quick clamping and releasing of the plate.

[0011] As a further technical solution, the frame X-direction feeding structure includes an X-direction drive device, guide rollers, guide columns, upper connecting rods, and lower connecting rods; two long first sliding grooves are provided on the base, the upper parts of the two guide rods are connected by the upper connecting rod, and the lower parts are connected by the lower connecting rod, the X-direction drive device is connected to the lower connecting rod, and the bottom of the two guide rods are guide rollers. Under the drive of the X-direction drive device, the guide rollers move along the first sliding grooves.

[0012] As a further technical solution, the Z-direction feeding structure of the frame includes a rotating rod, a sleeve rod, a Z-direction driving device and a connecting plate; the sleeve rod includes two, the two sleeve rods are sleeved on the guide column, and the upper parts of the two sleeve rods are connected by a connecting plate, and a rope hole and a frame buckle are provided on the connecting plate; and the lower parts of the two sleeve rods are rotatably connected to the rotating rod; the Z-direction driving device is installed on the upper connecting rod to drive the two sleeve rods to move in the Z direction.

[0013] As a further technical solution, the Z-direction drive devices include two, the cylinder bodies of the two Z-direction drive devices are respectively fixed at both ends of the upper connecting rod, and the pistons of the two Z-direction drive devices are respectively connected to the two sleeve rods.

[0014] As a further technical solution, the hydraulic telescopic clamp comprises a hydraulic chamber, a movable clamping block, an upper oil hole, and a lower oil hole. The upper and lower oil holes are located on the upper and lower surfaces of the hydraulic chamber, with the rear portion of the movable clamping block located within the hydraulic chamber and the front portion located outside. Hydraulic oil flows into the hydraulic chamber through the upper through-hole, pushing the movable clamping block out to clamp the movable rigid frame. The hydraulic oil then flows out of the hydraulic chamber through the lower through-hole, retracting the movable clamping block and returning the movable rigid frame to its movable state.

[0015] In a second aspect, the present invention further provides a forming system for complex thin-walled components, including the aforementioned clamping tooling for forming complex thin-walled components; and can realize stretching forming and double-sided progressive forming processing in sequence.

[0016] As a further technical solution, a flexible die for stretch forming and a double-sided progressive forming processing mechanism are also included;

[0017] The flexible mold is arranged below the rigid frame, and the double-sided progressive forming processing mechanism is located on both sides of the frame X-direction feeding structure and the frame Z-direction feeding structure.

[0018] As a further technical solution, a second sliding groove is provided on the base, and the double-sided progressive forming processing mechanism moves along the second sliding groove.

[0019] In a third aspect, the present invention further provides a method for forming a complex thin-walled component using the forming system, as follows:

[0020] Step 1: The rigid frame is placed on the hydraulic telescopic clamp, and the hydraulic telescopic clamp is extended to clamp the rigid frame;

[0021] Step 2: Use a quick clamping structure to fix the plate to be processed on the movable flexible clamp;

[0022] Step 3: The flexible forming mold is set to the desired shape;

[0023] Step 4: The hydraulic drive device presses down the hydraulic telescopic clamp, and the hydraulic telescopic clamp presses the rigid frame toward the flexible mold;

[0024] Step 5: driving the movable flexible clamp to rotate, so that the movable flexible clamp rotates in coordination with the stretch forming process, thereby increasing the limit forming angle during the stretch forming process;

[0025] Step 6: The hydraulic retractable clamp is retracted, and the movable frame clamp returns to a movable state;

[0026] Step 7: Pull the rope to pull the rigid frame to flip together, and fix it on the Z-direction feed structure of the frame after flipping into place;

[0027] Step 8: The frame Z-direction feeding structure adjusts the position of the plate in the Z direction;

[0028] Step 9: The frame X-direction feeding structure adjusts the position of the plate in the X direction;

[0029] Step 10: After the double-sided progressive forming processing mechanism moves to the double-sided progressive forming station, the double-sided progressive forming processing mechanism performs double-sided progressive forming processing on the plate.

[0030] The gain effects of the present invention are as follows:

[0031] 1) The clamping fixture, forming system, and method disclosed herein for forming complex thin-walled components utilize a hydraulically retractable clamp and a movable frame clamp to achieve a combination of two processing techniques. Combining the efficient deformation capabilities of stretch forming with the fine forming capabilities of double-sided progressive forming, this approach addresses the high production costs and time associated with a single process, the poor detail handling capabilities of stretch forming, and the unsuitability of double-sided progressive forming for mass production. During processing, the hydraulically retractable clamp is mounted on the hydraulic drive device used for stretch forming and works in conjunction with the movable frame clamp to switch between fixed and moving states. The movable frame clamp grips the sheet and moves together, enabling the switching between the two processing techniques. The structural rigidity of the movable frame clamp prevents deformation of the sheet from being disrupted. Furthermore, a movable flexible clamp is provided on the movable frame clamp, increasing the maximum forming angle for stretch forming and ensuring sheet forming accuracy through the self-locking capability of the movable flexible clamp. This invention enables high-precision, batch, flexible forming of a wide variety of complex thin-walled components.

[0032] 2. The present invention utilizes a movable frame-type fixture to clamp thin-walled components, achieving a maximum forming angle of 90° during stretch forming. This significantly increases the forming accuracy of thin-walled components compared to conventional stretch forming equipment. The present invention's movable frame-type fixture enables bidirectional feeding and fixture flipping, effectively integrating the thin-walled component stretch forming process with the double-sided incremental forming process, enabling high-precision, flexible batch forming of a wide variety of complex thin-walled components.

[0033] 3. The rigid frame structure of the movable frame clamp of the present invention enables the thin-walled component after stretching to maintain the stability of processing deformation during the movement process, further improving the forming accuracy of the thin-walled component.

[0034] 4. During the stretch forming process, hydraulic drive is used to apply a larger forming force, improve work stability and efficiency, and the use of flexible molds enables the processing of more complex thin-walled components.

[0035] 5. The double-sided progressive forming process used in the present invention ensures processing flexibility while improving processing accuracy compared to the single-point progressive forming process, thereby compensating for the problem of insufficient flexibility in drawing processing. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Figure 1 This is a schematic diagram of a clamping tool used for forming complex thin-walled components;

[0037] Figure 2 It is the overall schematic diagram of the stretch forming processing equipment;

[0038] Figure 3 Schematic diagram of the cross section of the hydraulic telescopic clamp;

[0039] Figure 4 It is the overall schematic diagram of the movable frame type fixture;

[0040] Figure 5 It is a cross-sectional diagram of the movable fixture shaft system;

[0041] Figure 6 It is a schematic diagram of the overall cross section of the hydraulic telescopic clamp and the movable frame clamp;

[0042] Figure 7 It is the overall schematic diagram of the frame bidirectional feeding structure;

[0043] In the figure: 1. Hydraulic drive device for stretch forming; 2. Hydraulic telescopic clamp; 3. Movable frame clamp; 4. Double-sided progressive forming mechanism; 5. Base; 6. Flexible mold;

[0044] 11. Hydraulic drive device; 12. Guide rail;

[0045] 21. Hydraulic chamber; 22. Movable clamp; 23. Upper oil hole 5; 24. Lower oil hole;

[0046] 31. Rigid frame; 32. Movable flexible clamp; 33. Frame X-direction feed structure; 34. Frame Z-direction feed structure; 35. Pull rope; 36. Connecting ear;

[0047] 311, guide keyway; 312, rope hole; 313, side plate;

[0048] 321. Sleeve clamp; 322. Splined long shaft; 323. Worm gear; 324. Worm; 325. Bearing; 326. End cover; 327. Quick clamping structure;

[0049] 331, X-axis driving device, 332 guide roller, 333 slide, 334 guide column, 335 upper connecting rod, 336 lower connecting rod;

[0050] 341. Rotating rod; 342. Frame buckle; 343. Rope hole; 344. Sleeve rod; 345. Z-direction drive device; 346. Connecting plate. DETAILED DESCRIPTION

[0051] It should be noted that the following detailed description is illustrative and is intended to provide further explanation of the present invention. Unless otherwise specified, all technical and scientific terms used in the present invention have the same meaning as commonly understood by those skilled in the art to which the present invention belongs.

[0052] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present invention. As used herein, unless otherwise clearly indicated in the present invention, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "include" and / or "comprising" are used in this specification, they indicate the presence of features, steps, operations, devices, components and / or their combinations;

[0053] Example 1

[0054] This embodiment discloses a clamping tool for forming complex thin-walled components. The composite forming equipment based on a movable rigid frame and a flexible clamp adopts a composite design, integrating stretching forming processing equipment and a double-sided progressive forming processing mechanism. Based on the movable rigid frame and the flexible clamp, the process conversion between stretching forming and double-sided progressive forming is realized to achieve high-precision batch flexible forming of various types of complex thin-walled components.

[0055] As attached Figure 1 -Attached Figure 7 As shown, in one embodiment of the present invention, a composite clamping fixture based on a movable rigid frame and a flexible clamp is used, including a base 5, on which a hydraulic drive device 1 for stretching and forming, a hydraulic telescopic clamp 2, and a movable frame clamp 3 are provided;

[0056] Side panels are provided on two opposite sides of the base 5, and hydraulic drive devices 1 for stretching and forming are provided on the two side panels; the hydraulic drive device 100 hydraulically retracts the clamp 2 up and down, and the hydraulic retracts the clamp 2 is used to clamp the movable frame clamp; the movable frame clamp 3 includes a rigid frame, a movable flexible clamp, a frame X-direction feed structure, a frame Z-direction feed structure, etc.; movable flexible clamps are respectively installed on two opposite side panels of the rigid frame, and connecting ears are provided at one end of the two side panels, and the connecting ears are connected to the rotating rod of the frame Z-direction feed structure, and the rigid frame is also connected to the frame Z-direction feed structure by a pull rope, so that the rigid frame can clamp the workpiece and flip it from a horizontal shape to a vertical shape, and the frame X-direction feed structure drives the frame Z-direction feed structure to move to a suitable processing position in the horizontal plane of the base. In this embodiment, the combination of two processing techniques is achieved by cooperating between a hydraulic telescopic clamp and a movable frame clamp, combining the efficient deformation capability of stretch forming with the fine forming capability of double-sided progressive forming, thereby solving the problems of high production cost of a single process, long production time, poor detail processing capability of stretch forming, and unsuitability of double-sided progressive forming for mass production. During the processing, the hydraulic telescopic clamp is arranged on a hydraulic drive device for stretch forming, and cooperates with the movable frame clamp to realize the switching between the fixed and moving states of the plate. The movable frame clamp clamps the plate and moves together to realize the switching between the two processing techniques, and relies on the structural rigidity of the movable frame clamp to keep the processing deformation of the plate from being destroyed. At the same time, a movable flexible clamp is provided on the movable frame clamp, which improves the limit forming angle of stretch forming, and relies on the self-locking ability of the movable flexible clamp to ensure the forming accuracy of the plate. According to the present invention, high-precision batch flexible forming of various types of complex thin-walled components can be achieved.

[0057] Specifically, such as Figure 2 As shown, the hydraulic drive device 1 for stretch forming in this embodiment includes a hydraulic drive device 11 and a guide rail 12;

[0058] Side panels are provided on both sides of the base 5, a flexible mold 6 is provided in the middle position of the base 5, a hydraulic drive device 11 is provided on each side panel, and guide rails 12 are provided on both sides of the hydraulic drive device 11. The hydraulic drive device 11 is an existing device, including a hydraulic cylinder and a hydraulic rod, which is used to drive the hydraulic telescopic clamp 2 to move up and down; each hydraulic drive device 11 is connected to a hydraulic telescopic clamp 2, and the two hydraulic telescopic clamps 2 jointly clamp the two sides of the movable frame 3, and the movable frame 3 is used to clamp the workpiece to be processed. Under the drive of the two hydraulic telescopic clamps 2, the workpiece to be processed can be moved toward the flexible mold 6, and the two hydraulic telescopic clamps 2 cooperate with the flexible mold 6 to realize the stretching forming processing of the workpiece to be processed.

[0059] Furthermore, the above-mentioned hydraulic telescopic clamp 2 includes a hydraulic chamber 21, a movable clamping block 22, an upper oil hole 23, and a lower oil hole 24; wherein, the upper oil hole 23 and the lower oil hole 24 are arranged on the upper and lower surfaces of the hydraulic telescopic clamp, and the hydraulic oil flows into the hydraulic chamber 21 arranged inside the hydraulic telescopic clamp 2 through the upper oil hole 23, driving the movable clamping block 22 to extend and clamp the movable frame-type clamp 3. After that, the hydraulic oil flows out through the lower oil hole 24, and the movable clamping block 22 is retracted, that is, the hydraulic telescopic clamp 2 can clamp the movable frame-type clamp 3 or release the movable frame-type clamp 3 as needed.

[0060] Furthermore, the movable frame-type clamp 3 includes a rigid frame 31, a movable flexible clamp 32, a frame X-direction feeding structure 33, a frame Z-direction feeding structure 34, and a connecting ear 36;

[0061] The rigid frame 31 is a rectangle as a whole, and a movable flexible clamp 32 is installed on the inner side of the left and right side panels 313 respectively; a connecting ear 36 is set at one end of the left and right side panels, which is connected to the rotating rod 341 of the frame Z-direction feed structure 34, and is also connected to the frame Z-direction feed structure 34 through the rigid frame 31 through a pull rope 35; so that the rigid frame 31 can clamp the workpiece and flip it 90 degrees, that is, the workpiece is flipped from a horizontal shape to a vertical shape, and the other side of the workpiece is processed; the frame X-direction feed structure 33 drives the frame Z-direction feed structure 34 to move to a suitable processing position in the horizontal plane.

[0062] Furthermore, specifically, guide key slots 311 are provided on the outer sides of the two side plates of the rigid frame 31 , and the guide key slots 311 are cooperatively connected with the movable clamping block 22 ;

[0063] Furthermore, the movable flexible clamp 32 includes a sleeve clamp 321, a splined long shaft 322, a worm gear 323, a worm 324, a bearing 325, an end cover 326, and a quick clamping structure 327; the sleeve clamp 321 is sleeved on the splined long shaft 322, and one end of the splined long shaft 322 is driven by a driving device such as a worm gear 323, a worm 324 and a servo motor, and the servo motor drives the vertically arranged worm 324 to rotate, and the worm 324 and the other end are rotatably connected to the rigid frame 31 through bearings 325, end covers 326, etc. The quick clamping structure 327 on the sleeve clamp 321 is used for quick clamping and releasing of the plate; when the quick clamping structures 327 of the two movable flexible clamps 32 clamp the workpiece to be processed, the movable flexible clamp 32 can be driven to rotate by the rotation of the servo motor, thereby increasing the limit forming angle of the workpiece during stretch forming processing.

[0064] Furthermore, the quick clamping structure 327 includes a pressure block and a screw. The pressure block is provided with a screw, and the plate can be pressed against the pressure block by rotating the screw. This structure is a common structure and is not shown in the figure. Of course, the quick clamping structure 327 can also be replaced with other structures.

[0065] Furthermore, the above-mentioned worm gear mechanism drives the movable clamp to rotate relative to the rigid frame during the stretch forming process, and maintains the rotation angle of the movable clamp with the good self-locking property of the worm gear transmission mechanism; at the same time, the quick clamping structure can realize the quick clamping and quick release of thin-walled components.

[0066] Furthermore, during the stretch forming process, the hydraulic drive device 11 drives the hydraulic telescopic clamp 2 to clamp the movable rigid frame 3, so that the movable flexible clamp 32 arranged on the rigid frame 31 is pressed down. At the same time, the servo motor rotates to drive the movable flexible clamp 32 to rotate, thereby increasing the limit forming angle of the stretch forming process.

[0067] Furthermore, after the stretching and forming process is completed, the movable clamp 22 is retracted, and the pull rope 35 connected between the rope hole 312 on the rigid frame 31 and the rope hole 343 on the frame Z-direction feed structure 34 pulls the movable frame clamp 3 to flip around the rotating rod 341 arranged on the lower side of the frame Z-direction feed structure 34, and is fixed on the frame buckle on the upper side of the frame Z-direction feed structure. At this time, the workpiece to be processed rotates from a horizontal shape to a vertical shape.

[0068] Furthermore, the above-mentioned frame X-direction feeding structure 33 is vertically arranged; specifically, the frame X-direction feeding structure 33 includes an X-direction driving device 331, a guide roller 332, a guide column 334, an upper connecting rod 335, a lower connecting rod 336 and a slide groove 333; two long slide grooves 333 are provided on the base, the upper parts of the two guide rods 334 are connected by the upper connecting rod 335, and the lower parts are connected by the lower connecting rod 336, the X-direction driving device 331 is connected to the lower connecting rod 336, and the bottom of the two guide rods 334 is a guide roller 332. Under the drive of the X-direction driving device 331, the guide roller 332 moves along the slide groove 333, and can move the entire device to a suitable position.

[0069] Furthermore, the above-mentioned frame Z-direction feeding structure 34 is arranged on the frame X-direction feeding structure, and is connected to the frame X-direction feeding mechanism by a sliding pair; the frame Z-direction feeding structure is provided with a rotating rod, a rigid frame buckle, and a rope hole; the rotating rod is used to connect to the rigid frame by a rotating pair; the rigid frame buckle is used to fix the rigid frame after flipping; the rope hole is used to pass the rope. Specifically, the frame Z-direction feeding structure 34 includes a rotating rod 341, a frame buckle 342, a rope hole 343, a sleeve rod 344, a Z-direction driving device 345, and a connecting plate 346; the sleeve rod 344 includes two, two sleeve rods 344 are sleeved on the above-mentioned guide column 334, and the upper parts of the two sleeve rods 344 are connected by a connecting plate 346, and a rope hole 343 and a frame buckle 342 are provided on the connecting plate 346; and the lower parts of the two sleeve rods 344 are each provided with a connecting ear, and the two connecting ears are rotatably connected to the rotating rod 341; wherein the rotating rod 341 and The above-mentioned connecting ears 36 are connected, and when the rotating rod 341 rotates, the rigid frame 31 is rotated; the Z-direction driving device 345 includes two, which are existing hydraulic cylinders or air cylinders. The cylinder bodies of the two Z-direction driving devices 345 are respectively fixed at the two ends of the upper connecting rod 335, and the pistons of the two Z-direction driving devices 345 are respectively connected to the two sleeve rods 344. When the rigid frame 31 is clamped on the frame Z-direction feeding structure 34, the height of the two sleeve rods 344 can be adjusted through the Z-direction driving device 345, and the height adjustment of the rigid frame 31 in the Z direction can be realized.

[0070] Example 2

[0071] This embodiment provides a complex thin-walled component forming system, comprising the clamping tool for complex thin-walled component forming described in Example 1, a flexible mold 6 for stretching forming, and a double-sided progressive forming mechanism 4;

[0072] The flexible mold 6 is arranged in the forming system of the complex thin-walled component in Example 1, below the rigid frame, and the double-sided progressive forming processing mechanism 4 is located on both sides of the frame X-direction feeding structure and the frame Z-direction feeding structure;

[0073] Furthermore, when the movable frame-type clamp 3 is driven by the frame X-direction feeding structure 33 and the frame Z-direction feeding structure 34 to move to the double-sided progressive forming processing station, the double-sided progressive forming processing mechanism 4 performs double-sided progressive forming processing.

[0074] Furthermore, in this embodiment, a second slide groove is set on the base 5, and the double-sided progressive forming processing mechanism 4 moves along the second slide groove, and can just move to both sides of the plate to perform double-sided progressive forming processing on the plate. The setting direction of the second slide groove is perpendicular to the setting direction of the slide groove in Example 1, that is, it is set along the Y direction.

[0075] Example 3

[0076] This embodiment, based on the forming system for complex thin-walled components disclosed in Example 2, further provides a method for performing stretch forming and double-sided incremental forming composite processing on a plate as follows:

[0077] 1. The movable frame fixture is arranged on the hydraulic telescopic fixture. Hydraulic oil is introduced into the hydraulic telescopic fixture to push the movable clamp out to clamp the movable frame fixture;

[0078] 2. Use the quick clamping structure to fix the plate on the movable flexible clamp;

[0079] 3. The flexible forming die is set to the desired shape;

[0080] 4. Hydraulic oil is introduced into the hydraulic drive device and the hydraulic lifting drive structure to drive the hydraulic telescopic clamp to clamp the movable frame clamp and press it down toward the flexible mold;

[0081] 5. The servo motor drives the movable flexible clamp to rotate in conjunction with the stretch forming process to increase the limit forming angle during the stretch forming process;

[0082] 6. The hydraulic oil flows out of the hydraulic telescopic clamp, the movable clamp is retracted, and the movable frame clamp returns to the movable state;

[0083] 7. After the stretch forming process is completed, the plate is processed into the required preliminary shape, and the rigid frame can maintain the processed deformation of the plate during the movement of the plate;

[0084] 8. The pull rope pulls the rigid frame and the movable flexible fixture holding the plate to flip over and fix it to the Z-direction feed structure of the frame;

[0085] 9. The hydraulic oil in the hydraulic drive device and the hydraulic lifting drive structure flows out, driving the frame Z-direction feed structure provided on the frame X-direction feed structure to move upward together with the plate;

[0086] 10. The servo motor drives the ball screw drive structure to drive the frame's X-axis feed structure movement;

[0087] 11. After the movable frame-type fixture clamps the plate and moves it to the double-sided progressive forming station, the double-sided progressive forming processing mechanism performs double-sided progressive forming processing on the plate;

[0088] 12. After the double-sided progressive forming process is completed, the rigid frame and plate are stretched and lowered;

[0089] 13. Use the quick clamping structure to release the sheet.

[0090] The foregoing description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Those skilled in the art will readily appreciate that various modifications and variations of the present invention are possible. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. A clamping tool for forming complex thin-walled components, characterized in that: It includes a base, side plates are provided on two opposite sides of the base, and hydraulic drive devices for stretching and forming are provided on the two side plates; the hydraulic drive device drives the hydraulic telescopic clamp to move up and down, and the hydraulic telescopic clamp is used to clamp the movable frame clamp; the movable frame clamp includes a rigid frame, a movable flexible clamp, a frame X-direction feeding structure, and a frame Z-direction feeding structure; movable flexible clamps are respectively installed on two opposite side plates of the rigid frame, and connecting ears are provided at one end of the two opposite side plates, and the connecting ears are connected to the rotating rod of the frame Z-direction feeding structure, and the rigid frame is also connected to the frame Z-direction feeding structure by a pull rope, so that the rigid frame can clamp the workpiece and flip it from a horizontal shape to a vertical shape, and the frame X-direction feeding structure drives the frame Z-direction feeding structure to move to a suitable processing position in the horizontal plane of the base; The frame X-direction feeding structure includes an X-direction driving device, guide rollers, guide columns, an upper connecting rod, and a lower connecting rod; two long first chute grooves are provided on the base, the upper parts of the two guide columns are connected by the upper connecting rod, and the lower parts are connected by the lower connecting rod, the X-direction driving device is connected to the lower connecting rod, and the bottoms of the two guide columns are guide rollers. Under the drive of the X-direction driving device, the guide rollers move along the first chute grooves; The Z-direction feeding structure of the frame includes a rotating rod, a sleeve rod, a Z-direction driving device and a connecting plate; the sleeve rod includes two, the two sleeve rods are sleeved on the guide column, and the upper parts of the two sleeve rods are connected by a connecting plate, and a rope hole and a frame buckle are provided on the connecting plate; and the lower parts of the two sleeve rods are rotatably connected to the rotating rod; the Z-direction driving device is installed on the upper connecting rod to drive the two sleeve rods to move in the Z direction.

2. The clamping tool for forming complex thin-walled components according to claim 1, characterized in that: The movable flexible clamp includes a sleeve clamp, a rotating shaft, a quick clamping structure and a driving device; the sleeve clamp is sleeved on the rotating shaft, a driving device is provided at one end of the rotating shaft, and the quick clamping structure on the sleeve clamp is used for quick clamping and releasing of the plate.

3. The clamping tool for forming complex thin-walled components according to claim 1, characterized in that: The Z-direction drive devices include two, the cylinder bodies of the two Z-direction drive devices are respectively fixed on the two ends of the upper connecting rod, and the pistons of the two Z-direction drive devices are respectively connected to the two sleeve rods.

4. The clamping tool for forming complex thin-walled components according to claim 1, characterized in that: The hydraulic telescopic clamp includes a hydraulic chamber, a movable clamping block, an upper oil hole, and a lower oil hole; wherein the upper oil hole and the lower oil hole are arranged on the upper and lower surfaces of the hydraulic chamber, the rear of the movable clamping block is located in the hydraulic chamber, and the front is located outside the hydraulic chamber.

5. A forming system for complex thin-walled components, characterized in that: The invention comprises a clamping tool for forming complex thin-walled components as described in any one of claims 1 to 4.

6. The forming system for complex thin-walled components according to claim 5, characterized in that: Also included are flexible dies for stretch forming and a double-sided progressive forming processing mechanism; The flexible mold is arranged below the rigid frame, and the double-sided progressive forming processing mechanism is located on both sides of the frame X-direction feeding structure and the frame Z-direction feeding structure.

7. The forming system for complex thin-walled components according to claim 6, characterized in that: A second sliding groove is provided on the base, and the double-sided progressive forming processing mechanism moves along the second sliding groove.

8. A forming method using the forming system for complex thin-walled components according to any one of claims 6 to 7, characterized in that: as follows: Step 1: The rigid frame is placed on the hydraulic telescopic clamp, and the hydraulic telescopic clamp is extended to clamp the rigid frame; Step 2: Use a quick clamping structure to fix the plate to be processed on the movable flexible clamp; Step 3: The flexible forming mold is set to the desired shape; Step 4: The hydraulic drive device presses down the hydraulic telescopic clamp, and the hydraulic telescopic clamp presses the rigid frame toward the flexible mold; Step 5: driving the movable flexible clamp to rotate, so that the movable flexible clamp rotates in coordination with the stretch forming process, thereby increasing the limit forming angle during the stretch forming process; Step 6: The hydraulic retractable clamp is retracted, and the movable frame clamp returns to a movable state; Step 7: Pull the rigid frame together with the rope to flip it over, and fix it on the Z-direction feed structure of the frame after it is flipped into place; Step 8: The frame Z-direction feeding structure adjusts the position of the plate in the Z direction; Step 9: The frame X-direction feeding structure adjusts the position of the plate in the X direction; Step 10: After the double-sided progressive forming mechanism moves to the double-sided progressive forming station, the double-sided progressive forming mechanism performs double-sided progressive forming on the plate.

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