Clamping tool, forming system and method for forming complex thin-wall component

Abstract

According to the clamping tool, the forming system and the forming method for the complex thin-wall component, combination of two machining technologies is achieved through cooperation of a hydraulic telescopic clamp and a movable frame type clamp, and the efficient deformation capacity of stretch forming and the fine forming capacity of double-face incremental forming are combined; the problems that a single process is high in production cost, long in production time and poor in stretch forming detail processing capacity, and double-face incremental forming is not suitable for mass production are solved. In the machining process, the hydraulic telescopic clamp is arranged on the stretch forming equipment and matched with the movable frame type clamp, and switching between the plate fixing state and the plate moving state is achieved. The movable frame type clamp clamps the plate to move together, switching of the two machining technologies is achieved, and by means of flexible clamping and structural rigidity of the movable frame type clamp, the forming limit of the plate is improved, and machining deformation of the plate is prevented from being damaged.

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 field of complex shape and customized parts manufacturing. The double-sided incremental forming process improves the single-point incremental forming process and improves the processing accuracy, but it still faces problems such as low processing accuracy and cannot be applied to mass production of parts. Stretch forming is an efficient and precise manufacturing process that applies stretching force to metal sheets through molds to form them into the desired shape in the mold cavity. It has high production efficiency and is suitable for mass production, but has poor processing 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, which can combine the high efficiency and precision of stretch forming with the flexibility and low mold cost of incremental forming, and achieve a perfect balance between high-precision rough forming and personalized detail adjustment. It is suitable for the efficient manufacturing and customized production of complex parts.

[0004] At present, the domestic stretch forming-progressive forming composite forming device is mainly patent CN103599982B. It discloses a sheet metal multi-point die pre-stretching progressive composite forming method and forming device, which can complete the composite processing process of complex thin-walled components stretching forming and progressive forming, but the clamp in the stretch forming process is not movable, the stretch forming limit angle is small, and when the clamp clamps the thin-walled parts and moves, the retention force of the thin-walled parts is poor. The subsequent progressive forming process adopts a single-point progressive forming process, and the forming accuracy is low. 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, a forming system and a 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 tool for forming complex thin-walled components, comprising a base, side plates are arranged on two opposite sides of the base, and hydraulic drive devices are arranged on the two side plates; the hydraulic drive device drives a hydraulic telescopic clamp to move up and down, and the hydraulic telescopic clamp is used to clamp a movable frame-type clamp; the movable frame-type clamp comprises a rigid frame, a movable flexible clamp, a frame X-direction feeding structure, a frame Z-direction feeding structure, and a connecting ear;

[0008] Movable flexible clamps are respectively installed on two opposite side plates of the rigid frame, and connecting ears are arranged at one end of the two 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 through a pull rope, so that the rigid frame can hold the workpiece and flip it from a horizontal state to a vertical state, 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;

[0009] The stretching hydraulic drive device drives the hydraulic telescopic clamp to clamp the thin-walled component and press it down, so that it is formed 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 arranged 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-axis feeding structure includes an X-axis driving device, guide rollers, guide columns, upper connecting rods, and lower connecting rods; two long first sliding grooves are arranged 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-axis driving 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-axis driving 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 arranged 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 device comprises two cylinders 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; wherein the upper oil hole and the lower oil hole are arranged on the upper and lower surfaces of the hydraulic chamber, the rear portion of the movable clamping block is located in the hydraulic chamber, and the front portion is located outside the hydraulic chamber. The above-mentioned hydraulic oil flows into the hydraulic chamber through the upper through hole to push the movable clamping block to extend and clamp the movable rigid frame, and then the hydraulic oil flows out of the hydraulic chamber through the lower through hole, the movable clamping block is retracted, and the movable rigid frame returns to a movable state.

[0015] In a second aspect, the present invention also provides a forming system for complex thin-walled components, including the clamping tooling for forming complex thin-walled components as described above; 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 slide groove is provided on the base, and the double-sided progressive forming processing mechanism moves along the second slide 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 arranged 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 shape required for forming;

[0023] Step 4: The hydraulic driving 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, and the movable flexible clamp rotates in coordination with the stretch forming process to increase the limit forming angle during the stretch forming process;

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

[0026] Step 7: Pull the rigid frame together with the pull rope to flip it, and fix it on the Z-direction feeding 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 incremental forming processing mechanism moves to the double-sided incremental forming station, the double-sided incremental forming processing mechanism performs double-sided incremental 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 for forming complex thin-walled components disclosed in the present invention realize the combination of two processing technologies through the coordination of hydraulic telescopic clamps and movable frame clamps, and combine the efficient deformation ability of stretch forming with the fine forming ability of double-sided progressive forming, so as to solve the problems of high production cost of a single process, long production time, poor detail processing ability of stretch forming, and unsuitability of double-sided progressive forming for mass production. During the processing, the hydraulic telescopic clamp is arranged on the 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 to move together, realizes the switching of the two processing technologies, 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 realized.

[0032] 2. The present invention adopts a movable frame-type clamp to clamp thin-walled components, so that the limit forming angle of stretch forming can reach 90°, which achieves a larger limit forming angle than common stretch forming processing equipment, and improves the forming accuracy of thin-walled components. The movable frame-type clamp of the present invention can realize two-way feeding and clamp flipping functions, so that the thin-walled component stretch forming process and the double-sided progressive forming process are well combined, and a variety of complex thin-walled components can be formed in batches with high precision and flexibility.

[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 movement, 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 working stability and efficiency. At the same time, the use of flexible molds makes it possible to process more thin-walled components with complex shapes.

[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 It is an overall 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 It is a cross-sectional schematic diagram of a hydraulic telescopic clamp;

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

[0040] Figure 5 It is a schematic cross-sectional view 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 processing 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 feeding structure; 34. Frame Z-direction feeding 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 wheel; 324. worm; 325. bearing; 326. end cover; 327. quick clamping structure;

[0049] 331, X-axis driving device, 332 guide roller, 333 slide groove, 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 driving device, 346, connecting plate. DETAILED DESCRIPTION

[0051] It should be noted that the following detailed descriptions are illustrative and 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 meanings as those 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 explicitly stated 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 "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof;

[0053] Example 1

[0054] The present embodiment discloses a clamping tool for the forming of 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. The process conversion of stretching forming and double-sided progressive forming is realized based on the movable rigid frame and the flexible clamp, so as to realize 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 tool 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 forming, a hydraulic telescopic clamp 2, and a movable frame clamp 3 are arranged;

[0056] Side plates are arranged on two opposite sides of the base 5, and hydraulic drive devices 1 for stretching forming are arranged oppositely on the two side plates; the hydraulic drive device 100 hydraulic telescopic clamp 2 moves up and down, and the hydraulic telescopic clamp 2 is used to clamp the movable frame type clamp; the movable frame type clamp 3 includes a rigid frame, a movable flexible clamp, a frame X-direction feeding structure, a frame Z-direction feeding structure, etc.; movable flexible clamps are respectively installed on two opposite side plates of the rigid frame, and connecting ears are arranged at one end of the two 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 through a pull rope, so that the rigid frame can clamp the workpiece and flip it from a horizontal state to a vertical state, 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. In this embodiment, the combination of two processing techniques is realized by the cooperation of the hydraulic telescopic clamp and the movable frame clamp, and the efficient deformation ability of stretch forming and the fine forming ability of double-sided progressive forming are combined to solve the problems of high production cost of a single process, long production time, poor detail processing ability of stretch forming, and double-sided progressive forming not being suitable for mass production. During the processing, the hydraulic telescopic clamp is set on the hydraulic drive device for stretch forming, and cooperates with the movable frame clamp to realize the switching of the fixed and moving states of the plate. The movable frame clamp clamps the plate to move together to realize the switching of 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 realized.

[0057] Specifically, 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 arranged on both sides of the base 5, a flexible mold 6 is arranged in the middle position of the base 5, a hydraulic drive device 11 is arranged on each side panel, and guide rails 12 are arranged 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 cavity 21, a movable clamp 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 cavity 21 arranged inside the hydraulic telescopic clamp 2 through the upper oil hole 23, driving the movable clamp block 22 to extend and clamp the movable frame-type clamp 3, and then the hydraulic oil flows out through the lower oil hole 24, and the movable clamp 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] Further, the above-mentioned 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 movable flexible clamps 32 are respectively installed on the inner sides of the left and right side panels 313; a connecting ear 36 is set at one end of the left and right side panels, and the connecting ear 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 state to a vertical state, 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] Further, specifically, guide key grooves 311 are provided on the outer sides of the two side plates of the rigid frame 31, and the guide key grooves 311 are matched and 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 wheel 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 wheel 323, a worm 324 and a servo motor, and the servo motor drives the vertically arranged worm 324 to rotate, and the worm 324 is rotatably connected to the rigid frame 31 at the other end through a bearing 325, an end cover 326, etc., and 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 the stretch forming process.

[0064] Furthermore, the quick clamping structure 327 includes a pressing block and a screw. The pressing block is provided with a screw, and the plate can be pressed against the pressing 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 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 stretch 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 state to a vertical state.

[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 arranged 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 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 be connected to the rigid frame by a rotating pair; the rigid frame buckle is used to fix the rigid frame after flipping; and 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 sleeve rods 344, the 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 the rope hole 343 and the 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 with 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 existing hydraulic cylinders or air cylinders, and 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, so that 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 tooling for complex thin-walled component forming described in Embodiment 1, a flexible mold 6 for stretching forming, and a double-sided progressive forming processing 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 is based on the forming system of the complex thin-walled component disclosed in Example 2, and further provides a method for performing stretch forming-double-sided incremental forming composite processing on a plate as follows:

[0077] 1. The movable frame-type clamp is arranged on the hydraulic telescopic clamp. The hydraulic telescopic clamp is fed with hydraulic oil to push the movable clamp block out to clamp the movable frame-type clamp.

[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 shape required for forming;

[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 down the flexible mold together;

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

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

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

[0084] 8. The pull rope pulls the rigid frame and the movable flexible clamp holding the plate to flip over and fix them on the Z-direction feeding 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 feeding structure arranged on the frame X-direction feeding structure to move upward together with the plate;

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

[0087] 11. After the movable frame-type clamp 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 sheet are stretched and laid down;

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

[0090] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope 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 arranged on two opposite sides of the base, and hydraulic drive devices for stretching forming are arranged oppositely 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 type clamp; the movable frame type 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 arranged at one end of the two 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 through a pull rope, so that the rigid frame can clamp the workpiece and flip it from a horizontal state to a vertical state, 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.

2. The clamping tool for forming complex thin-walled components according to claim 1, characterized in that: The movable flexible clamp comprises 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 arranged 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 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 sliding grooves are arranged 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 driving device is connected to the lower connecting rod, and the bottoms of the two guide rods are guide rollers. Under the drive of the X-direction driving device, the guide rollers move along the first sliding grooves.

4. The clamping tool for forming complex thin-walled components according to claim 3, characterized in that: The frame Z-direction feeding structure 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 arranged 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.

5. The clamping tool for forming complex thin-walled components according to claim 4, characterized in that: The Z-direction drive devices include two, the cylinder bodies of the two Z-direction drive devices are respectively fixed at 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.

6. The clamping tool for forming complex thin-walled components according to claim 1, characterized in that: The hydraulic telescopic clamp comprises a hydraulic cavity, 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 cavity, the rear of the movable clamping block is located in the hydraulic cavity, and the front is located outside the hydraulic cavity.

7. A forming system for complex thin-walled components, characterized in that: It comprises the clamping tool for forming complex thin-walled components as described in any one of claims 1-6.

8. The complex thin-walled component forming system according to claim 7, 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.

9. The complex thin-walled component forming system according to claim 8, characterized in that: A second slide groove is arranged on the base, and the double-sided progressive forming processing mechanism moves along the second slide groove.

10. A method for forming a complex thin-walled component using the forming system of any one of claims 8 to 9, characterized in that: as follows: Step 1: The rigid frame is arranged 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 shape required for forming; Step 4: The hydraulic driving 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, and the movable flexible clamp rotates in coordination with the stretch forming process to increase the limit forming angle during the stretch forming process; Step 6: The hydraulic retractable clamp is retracted, and the movable frame clamp is restored to a movable state; Step 7: Pull the rigid frame together with the pull rope to flip it, and fix it on the Z-direction feeding structure of the frame after flipping 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 incremental forming processing mechanism moves to the double-sided incremental forming station, the double-sided incremental forming processing mechanism performs double-sided incremental forming processing on the plate.

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