Large thin-walled wind turbine casing clamping device

Abstract

This invention discloses a clamping device for large thin-walled wind turbine casings, belonging to the field of machining equipment technology. It includes a worktable and a flexible clamping and anti-deformation mechanism. The flexible clamping and anti-deformation mechanism includes a radial adjustment component and an axial adjustment component. The radial adjustment component includes a first telescopic drive element, an anti-deformation fixing plate, and an adjustable support tube. Multiple first telescopic drive elements and anti-deformation fixing plates are sequentially connected end-to-end in a ring shape, spaced apart circumferentially. Adjacent first telescopic drive elements and anti-deformation fixing plates are rotatably connected, with their rotation axes parallel to the workpiece's axial direction. The telescopic portion of the adjustable support tube is connected to either the first telescopic drive element or the anti-deformation fixing plate. The axial adjustment component is mounted on the worktable and fixedly connected to the fixed portion of the adjustable support tube, allowing adjustment of the axial distance between the radial adjustment component and the worktable. This device can support the large thin-walled wind turbine casing, preventing deformation during processing and improving processing efficiency and quality.

Description

Technical Field

[0001] This invention relates to the field of machining equipment technology, specifically to a clamping device for large thin-walled wind turbine casings. Background Technology

[0002] In the milling process of large thin-walled wind turbine shells, the thin wall thickness makes the workpiece prone to deformation during machining. Furthermore, the workpiece end face has numerous machining features, resulting in a large amount of material removal and high precision requirements. Without tooling for clamping, workpiece tolerances are difficult to guarantee, leading to low machining efficiency. Simultaneously, when batch-processing such workpieces, frequent clamping and positioning generate significant auxiliary machining time, wasting machine tool capacity and imposing high labor intensity on operators, hindering efficiency improvements. Summary of the Invention

[0003] To address the problems existing in the prior art, the present invention provides a clamping device for large thin-walled wind turbine housings, which can support large thin-walled wind turbine housings with relatively thin walls, prevent deformation during processing, facilitate operation, and improve processing efficiency and quality.

[0004] To achieve the above objectives, the technical solution adopted by the present invention is as follows:

[0005] This invention provides a clamping device for a large thin-walled wind turbine casing, including a worktable, on which a flexible clamping and anti-deformation mechanism is provided, the flexible clamping and anti-deformation mechanism including a radial adjustment component and an axial adjustment component;

[0006] The radial adjustment assembly includes a first telescopic drive element, an anti-deformation fixing plate, and an adjustable support tube. Multiple first telescopic drive elements and anti-deformation fixing plates are connected end-to-end in a ring shape, with the first telescopic drive elements and anti-deformation fixing plates spaced apart circumferentially. Adjacent first telescopic drive elements and anti-deformation fixing plates in the circumferential direction are rotatably connected, with the rotation axis parallel to the workpiece's axial direction. The telescopic portion of the adjustable support tube is connected to either the first telescopic drive element or the anti-deformation fixing plate.

[0007] The axial adjustment component is mounted on the worktable and fixedly connected to the fixed part of the adjustable support tube, and the axial distance between the radial adjustment component and the worktable can be adjusted.

[0008] In the above-mentioned large thin-walled wind turbine housing clamping device, the radial adjustment component further includes a pressure sensor, which is located at the contact position between the anti-deformation fixing plate and the workpiece.

[0009] In the above-mentioned large thin-walled wind turbine housing clamping device, the axial adjustment assembly includes a second telescopic drive element, which is mounted on the worktable and extends axially, with its telescopic end connected to the fixed part of the adjustable support tube.

[0010] In the above-mentioned large thin-walled wind turbine housing clamping device, the axial adjustment assembly further includes a rotary support base, which is rotatably mounted on the worktable, and the fixed end of the second telescopic drive element is mounted on the rotary support base.

[0011] In the above-mentioned large thin-walled wind turbine casing clamping device, the workbench is equipped with multiple sets of flexible automatic alignment mechanisms, the flexible automatic alignment mechanisms including fixed bases, flexible array magnetic chucks and hydraulic adjustment tops;

[0012] The mounting base is used to connect the workbench;

[0013] The flexible array magnetic chuck includes multiple magnetic pole units and a base. The base is fixedly installed on the fixed seat, and the multiple magnetic pole units are arranged in an array on the base.

[0014] The hydraulic adjustment top is mounted on the fixed base.

[0015] In the above-mentioned large thin-walled wind turbine housing clamping device, the base is provided with a limiting unit to limit the lowest position of the workpiece;

[0016] And / or, the magnetic pole unit includes an upper slider and a fixed block, the upper slider can slide up and down along the inclined surface of the fixed block; the upper slider has a built-in electromagnet module, and an elastic element is provided between the upper slider and the fixed block, the elastic element applies a force to the upper slider so that the upper slider has a tendency to slide upward along the inclined surface of the fixed block.

[0017] In the above-mentioned large thin-walled wind turbine casing clamping device, a front-to-back adjustment mechanism is provided between the worktable and the flexible automatic alignment mechanism to control the radial position of the flexible automatic alignment mechanism; the front-to-back adjustment mechanism includes a bottom support plate, a linear guide rail, a linear guide slider and a first drive unit;

[0018] The bottom support plate is fixedly installed on the workbench;

[0019] The linear guide rail is mounted on the bottom support plate, and the fixed base is slidably connected to the linear guide rail via the linear guide rail slider;

[0020] The first driving unit drives the fixed base to slide along the linear guide rail.

[0021] In the above-mentioned large thin-walled wind turbine housing clamping device, the first drive unit includes a first lead screw nut and a first lead screw. The first lead screw nut is fixedly connected to the fixed seat or the linear guide slider, and the first lead screw drives the first lead screw nut to move radially.

[0022] In the above-mentioned large thin-walled wind turbine housing clamping device, the worktable is provided with multiple sets of automatic positioning mechanisms, which are evenly distributed circumferentially to cooperate in positioning the center of the workpiece.

[0023] The automatic positioning mechanism includes a support base, a jaw, and a second drive unit; the support base is fixed on the worktable, the jaw is disposed on the support base and can move relative to the support base, and the second drive unit drives the jaw to move radially; the jaw has a radially inward or outward clamping surface for contacting the inner or outer surface of the workpiece.

[0024] In the above-mentioned large thin-walled wind turbine housing clamping device, the second drive unit includes a second lead screw and a second lead screw nut. The support base is provided with a guide groove. The second lead screw is located in the guide groove. The second lead screw nut is slidably connected to the guide groove. The pawl is fixedly installed on the second lead screw nut.

[0025] The beneficial effects of this invention are as follows:

[0026] The large thin-walled wind turbine casing clamping device can use a flexible clamping anti-deformation mechanism to support the inner side of the workpiece, preventing the workpiece from deforming during processing. In the flexible clamping anti-deformation mechanism, the radial dimension of the radial adjustment component is adjustable. Specifically, the radial adjustment component consists of multiple first telescopic drive elements and anti-deformation fixing plates connected end to end in a ring. The first telescopic drive elements and anti-deformation fixing plates are connected by a rotatable connection. The outer diameter of the first telescopic drive elements can be adjusted by telescopic extension. The anti-deformation fixing plates are used to contact the inner side of the workpiece and provide supporting force.

[0027] This clamping device solves the problems of insufficient machining accuracy, easy product deformation during machining, and low machining efficiency in the milling process of large thin-walled wind turbine shells. It can realize automatic clamping and mechanized operation, improve accuracy and increase clamping efficiency by 300%, save manual clamping time, and effectively save machining costs.

[0028] For large thin-walled wind turbine housings with unprocessed lower end faces, the flexible automatic alignment mechanism solves the problem of uneven contact and easy deformation of the product blank surface. Automatic alignment is completed through probes and adjustable hydraulic jacks, saving alignment time in the workpiece processing process and improving clamping and alignment efficiency.

[0029] The clamping device of this application is highly versatile and can be adapted to the clamping of most generator housings on the market. At the same time, it reduces workpiece deformation errors, saves production time, and improves processing efficiency.

[0030] It can effectively ensure the machining accuracy of large thin-walled wind turbine casings during milling. It not only automatically adjusts and shortens the alignment time, but also has high clamping accuracy. At the same time, it effectively increases the support rigidity and ensures machining efficiency. Attached Figure Description

[0031] Figure 1 This is a schematic diagram showing the usage state of the large thin-walled wind turbine housing clamping device of the present invention;

[0032] Figure 2 This is a schematic diagram of the structure of the large thin-walled wind turbine housing clamping device of the present invention;

[0033] Figure 3 A schematic diagram of the clamping state of the flexible clamping and anti-deformation mechanism;

[0034] Figure 4 This is a schematic diagram of the flexible automatic alignment mechanism;

[0035] Figure 5 This is a schematic diagram of the front and rear adjustment mechanism;

[0036] Figure 6 This is a schematic diagram of the automatic positioning mechanism;

[0037] Figure 7 This is a schematic diagram of the structure where the adjustable support tube and the anti-deformation fixing plate are hinged together.

[0038] Figure 8 A schematic diagram of the structure in which the adjustable support tube is fixedly connected to the first telescopic drive element;

[0039] Figure 9 A schematic diagram of a double-headed cylinder used as the first telescopic drive element;

[0040] Figure 10 This is a schematic diagram of the assembly structure of the magnetic pole unit.

[0041] In the picture:

[0042] 100-Flexible clamping anti-deformation mechanism; 110-First telescopic drive element; 120-Rotating shaft; 130-Anti-deformation fixing plate; 140-Adjustable support tube; 141-Fixing part; 142-Telescopic part; 150-Second telescopic drive element; 160-Rotating support seat; 170-Hinge seat;

[0043] 200 - Front and rear adjustment mechanism; 210 - Bottom support plate; 220 - Linear guide rail; 230 - Linear guide slider; 240 - First lead screw nut; 250 - First lead screw; 260 - First reducer flange; 270 - First reducer; 280 - First servo motor;

[0044] 300-Flexible automatic alignment mechanism; 310-Fixed base; 320-Base; 330-Magnetic pole unit; 331-Upper slider; 332-Fixed block; 333-Limit plate; 340-Limit unit; 350-Hydraulic adjusting top;

[0045] 400 - Automatic positioning mechanism; 410 - Second servo motor; 420 - Second reducer; 430 - Second reducer flange; 440 - Pallet; 450 - Support base; 460 - Second lead screw; 470 - Second lead screw nut;

[0046] 500-Workbench;

[0047] 600 - Workpiece; 610 - Support plate; 620 - First end plate; 630 - Second end plate; 640 - Center hole. Detailed Implementation

[0048] To facilitate understanding by those skilled in the art, the present invention will be further described below with reference to the accompanying drawings.

[0049] Large thin-walled wind turbine housing, hereinafter referred to as workpiece 600, such as... Figure 1 , Figure 3 As shown, the device has a first end plate 620, a second end plate 630, and multiple support plates 610. Both the first end plate 620 and the second end plate 630 have a central hole 640. The support plates 610 are located between the first end plate 620 and the second end plate 630, and are fixedly connected to the first end plate 620 and the second end plate 630 at both ends, respectively. The multiple support plates 610 are distributed in the circumferential direction of the central hole 640. It should be noted that the circumferential, radial, and axial directions mentioned below can be referred to as the circumferential, radial, and axial directions of the central hole 640. Figure 1 , Figure 3 In the example of workpiece 600 shown, there are four support plates 610. In other models and specifications of workpiece 600, the number of support plates 610 may be two or three, or other required quantities.

[0050] Please refer to Figures 1-6 This invention provides an embodiment of a large thin-walled wind turbine housing clamping device, which can be applied to the clamping of the aforementioned workpiece 600, improving the processing efficiency of workpiece 600, reducing production costs and the labor intensity of operators, and achieving fast and accurate clamping and positioning of workpiece 600.

[0051] The large thin-walled wind turbine casing clamping device includes a worktable 500, a flexible clamping and anti-deformation mechanism 100, a flexible automatic alignment mechanism 300, and an automatic positioning mechanism 400. The worktable 500 serves as the load-bearing base and can be assembled and connected to machine tools and other equipment. The flexible clamping and anti-deformation mechanism 100, the flexible automatic alignment mechanism 300, and the automatic positioning mechanism 400 are all mounted on the worktable 500. The flexible clamping and anti-deformation mechanism 100 provides support inside the workpiece 600 to prevent deformation during processing. The automatic positioning mechanism 400 positions the workpiece 600 from below, centering it. The flexible automatic alignment mechanism 300 is located below the workpiece 600, engaging and supporting its lower end face to align and fix it. Preferably, a front-to-back adjustment mechanism 200 is provided between the flexible automatic alignment mechanism 300 and the worktable 500. The front-to-back adjustment mechanism 200 drives the flexible automatic alignment mechanism 300 to adjust its position radially to meet the support and fixing requirements of workpieces 600 with different diameters.

[0052] Optional, such as Figure 1 , Figure 2 As shown, the flexible clamping and anti-deformation mechanism 100, the flexible automatic alignment mechanism 300, and the automatic positioning mechanism 400 are all modularly designed for easy disassembly and assembly. The flexible clamping and anti-deformation mechanism 100 is located in the center of the workbench 500. Multiple sets of flexible automatic alignment mechanisms 300 and multiple sets of automatic positioning mechanisms 400 are arranged around the flexible clamping and anti-deformation mechanism 100. Preferably, the flexible automatic alignment mechanisms 300 and the automatic positioning mechanisms 400 are spaced apart in the circumferential direction.

[0053] Of course, in other embodiments, the flexible clamping anti-deformation mechanism 100, the flexible automatic alignment mechanism 300, and the automatic positioning mechanism 400 can also be directly integrated onto the workbench 500. However, the convenience of operation will be reduced after integration for handling and hoisting operations.

[0054] The flexible clamping and anti-deformation mechanism 100 can support any position on the inner side of the workpiece 600 according to processing needs. For example, the flexible clamping and anti-deformation mechanism 100 cooperates with the inner side of the support plate 610 and supports the upper part of the inner side of the support plate 610 when the workpiece 600 is processed.

[0055] Specifically, such as Figure 2 and Figure 3 As shown, the flexible clamping anti-deformation mechanism 100 includes a radial adjustment component and an axial adjustment component; wherein, the radial adjustment component includes a first telescopic drive element 110, a hinge seat 170, a rotating shaft 120, an anti-deformation fixing plate 130 and an adjustable support tube 140, and the axial adjustment component includes a second telescopic drive element 150 and a rotating support seat 160.

[0056] For the radial adjustment assembly, there are multiple first telescopic drive elements 110 and anti-deformation fixing plates 130, which are sequentially connected end-to-end to form a ring. The first telescopic drive elements 110 and anti-deformation fixing plates 130 are spaced apart circumferentially. The first telescopic drive elements 110 and anti-deformation fixing plates 130 are connected by a rotatable connection, and their rotation axes are parallel to the axial direction of the workpiece 600. For example, hinge seats 170 are fixedly installed at both ends of the anti-deformation fixing plate 130, and the hinge seats 170 are located radially inside the anti-deformation fixing plate 130; a rotation shaft 120 is provided on the hinge seat 170 as the rotation axis of the first telescopic drive elements 110 and the anti-deformation fixing plate 130.

[0057] Figures 1-3 as well as Figures 7-9 The first telescopic drive element 110 shown is a cylinder. For a given first telescopic drive element 110, of its two adjacent anti-deformation fixing plates 130 in the circumferential direction, one anti-deformation fixing plate 130 is rotatably connected to the cylinder housing near the rotation axis 120 of the first telescopic drive element 110, and the cylinder's telescopic rod is rotatably connected to the other anti-deformation fixing plate 130 near the rotation axis 120 of the first telescopic drive element 110. It is understood that the first telescopic drive element 110 can also be a hydraulic cylinder, electric cylinder, or other length-adjustable element.

[0058] In the radial adjustment assembly, the anti-deformation fixing plate 130 contacts the inner surface of the support plate 610, providing a supporting force to prevent deformation of the workpiece 600 during processing. Therefore, the shape of the anti-deformation fixing plate 130 is adapted to the contact position with the inner surface of the workpiece 600 to increase the contact surface area. For example, Figure 1 , Figure 3 The workpiece 600 shown in the diagram contacts the anti-deformation fixing plate 130 at the inner side of the support plate 610, which is a flat surface. The anti-deformation fixing plate 130 is a flat plate, and support is achieved through flat surface contact. The number of anti-deformation fixing plates 130 can be set according to actual needs, for example, 4 plates, preferably 3-6 plates. The anti-deformation fixing plate 130 directly contacts the workpiece 600. If only one anti-deformation fixing plate 130 is in contact, the support effect is not good. By using multiple anti-deformation fixing plates 130 in combination, support is provided at multiple different positions on the workpiece 600, and the workpiece 600 is subjected to more even force.

[0059] The first telescopic drive element 110 is telescopic and acts as a drive element, cooperating with the anti-deformation fixing plate 130. When the first telescopic drive element 110 extends or retracts, the radial dimension of the annular support module formed by the anti-deformation fixing plate 130 and the first telescopic drive element 110 is adjustable. On the one hand, the anti-deformation fixing plate 130 can be tightened against the support plate 610 or loosened; on the other hand, the radial adjustment assembly can adapt to the clamping of workpieces 600 with different inner diameters and specifications, exhibiting strong versatility. Controlling the extension of the first telescopic drive element 110 causes the anti-deformation fixing plate 130 to tighten against the support plate 610, and the tight cooperation between the first telescopic drive element 110 and the anti-deformation fixing plate 130 ensures support force. Controlling the retraction of the first telescopic drive element 110 causes the anti-deformation fixing plate 130 to separate from the support plate 610, thereby facilitating the assembly and disassembly of the workpiece 600. The first telescopic drive element 110 and the anti-deformation fixing plate 130 adopt a hinge structure, which is stable. The hinge structure allows the anti-deformation fixing plate 130 and the first telescopic drive element 110 to generate relative rotational motion, ensuring that the first telescopic drive element 110 and the anti-deformation fixing plate 130 can coordinate their actions normally during use, avoiding interference or jamming.

[0060] The adjustable support tube 140 provides support for the annular support module to ensure that the annular support module can be adjusted in a controllable manner. Specifically, the adjustable support tube 140 includes a fixed part 141 and a telescopic part 142. The fixed part 141 is connected to the axial adjustment assembly, and the telescopic part 142 can extend and retract relative to the fixed part 141; for example, the fixed part 141 is hollow, and the telescopic part 142 is located inside the fixed part 141 and can slide relative to it.

[0061] Please refer to Figures 1-3 The first embodiment of the radial adjustment assembly is shown, in which the telescopic portion 142 of the adjustable support tube 140 is fixedly connected to the middle of the anti-deformation fixing plate 130.

[0062] In this embodiment, the workpiece 600 has four support plates 610, and correspondingly, the number of the first telescopic drive element 110 and the anti-deformation fixing plate 130 are both four; the fixing part 141 of the adjustable support tube 140 is "+" shaped and has four hollow cantilever arms; the telescopic part 142 is slidably connected to the cantilever arms of the fixing part 141 and is telescopic.

[0063] The telescopic part 142 is fixedly connected to the anti-deformation fixing plate 130. The anti-deformation fixing plate 130 can only be adjusted radially. The adjustment power comes from the extension and retraction of the first telescopic drive element 110. The first telescopic drive element 110 applies force to both ends of the anti-deformation fixing plate 130, driving the anti-deformation fixing plate 130 to move radially and applying a suitable clamping force after it moves into place. The anti-deformation fixing plate 130 is clamped against the inner side of the support plate 610 to prevent deformation of the workpiece 600 during processing.

[0064] It can be reasonably inferred that when the workpiece 600 has three support plates 610 and the support plates 610 are flat, the fixing part 141 of the adjustable support tube 140 is "Y" shaped, and the number of anti-deformation fixing plates 130 and the number of first telescopic drive elements 110 are both three. In other embodiments, the structural form of the fixing part 141 and the number of anti-deformation fixing plates 130 can be selected according to the number and position of the support plates 610 of the workpiece 600, and will not be listed exhaustively here.

[0065] Figure 8 A second embodiment of the radial adjustment assembly is shown, in which the telescopic portion 142 of the adjustable support tube 140 is fixedly connected to the housing of the first telescopic drive element 110. Preferably, the first telescopic drive element 110 may be a double-headed cylinder, such as... Figure 9 As shown, the housing in the middle is fixedly connected to the telescopic part 142, and the two piston rods are hinged to the anti-deformation fixing plate 130.

[0066] Figure 7 In a third embodiment of the radial adjustment assembly, the telescopic portion 142 of the adjustable support tube 140 is hinged to the anti-deformation fixing plate 130, such as... Figure 7 As shown, the hinge shaft is parallel to the rotation shaft 120, so the anti-deformation fixing plate 130 can rotate relative to the telescopic part 142.

[0067] In the second and third embodiments of the radial adjustment assembly, the anti-deformation fixing plate 130 can be adjusted not only radially, but also at the angle α between it and the telescopic part 142. This provides the anti-deformation fixing plate 130 with greater freedom of movement, improving its adaptability and enabling it to support different workpieces 600. The adjustable support tube 140 provides support for the first telescopic drive element 110 and the anti-deformation fixing plate 130, while simultaneously defining the relative positions of the multiple first telescopic drive elements 110 or the multiple anti-deformation fixing plates 130.

[0068] The radial adjustment assembly controls and adjusts the force exerted by the anti-deformation fixing plate 130 on the inner side of the support plate 610 through the first telescopic drive element 110. Furthermore, a pressure sensor is installed at the contact position between the anti-deformation fixing plate 130 and the workpiece 600 to detect the magnitude of the force. Before use, a suitable pressure is calculated based on the structure of different models of workpieces 600. When the pressure generated by the first telescopic drive element 110 pressing against the workpiece 600 reaches the calculated suitable pressure, the pressure sensor sends a feedback signal to the control system, thereby controlling the first telescopic drive element 110 to stop applying pressure. This ensures that the anti-deformation fixing plate 130 provides strong support for the workpiece 600, guaranteeing the rigidity of the workpiece 600 during processing, while also preventing excessive support force from the first telescopic drive element 110 that could cause deformation of the workpiece 600.

[0069] The axial adjustment assembly can adjust the axial position of the radial adjustment assembly. Its rotating support 160 is rotatably mounted on the worktable 500. The second telescopic drive element 150 extends axially, with its fixed end fixedly connected to the rotating support 160 and its telescopic end connected to the fixed part 141 of the adjustable support tube 140. The extension and retraction of the second telescopic drive element 150 is controlled to adapt to the clamping requirements of workpieces 600 with different heights and dimensions. The rotating support 160 can drive the radial adjustment assembly to rotate, thereby clamping the workpiece 600.

[0070] Flexible automatic alignment mechanism 300 Figure 4 As shown, it includes a fixed base 310, a flexible array magnetic chuck, and a hydraulically adjustable top 350. The fixed base 310 is used to connect the worktable 500, and both the flexible array magnetic chuck and the hydraulically adjustable top 350 are mounted on the fixed base 310.

[0071] The flexible array magnetic chuck includes multiple magnetic pole units 330, a limiting unit 340, and a base 320. The base 320 is fixedly mounted on the fixed base 310, the multiple magnetic pole units 330 are arranged in an array on the base 320, and the limiting unit 340 is also fixedly mounted on the base 320.

[0072] like Figure 10 As shown, the magnetic pole unit 330 includes an upper slider 331, a fixing block 332, and a limiting plate 333. The fixing block 332 is fixed on the base 320, and its upper end surface is inclined. The upper slider 331 has a built-in electromagnet module and can slide up and down along the inclined surface of the fixing block 332. The limiting plate 333 is located on both sides of the inclined surface of the fixing block 332 and can guide and limit the up and down sliding of the upper slider 331. An elastic element (not shown in the figure) is provided between the upper slider 331 and the fixing block 332, so as to ensure that when the electromagnet module of the upper slider 331 is not energized, the upper slider 331 is pushed to the upper limit position by the elastic element, i.e., the pop-out state. When the electromagnet module of the upper slider 331 is not energized, and the workpiece 600 is placed on it, multiple magnetic pole units 330 automatically adjust the position of the upper slider 331 according to the shape of the contact area with the workpiece 600. This ensures that each magnetic pole unit 330 can support the workpiece 600, thereby increasing the contact area between the flexible array magnetic chuck and the workpiece 600. The elastic element can be a spring, with its axis parallel to the inclined plane. As the upper slider 331 slides relative to the fixed block 332, the spring's compression length decreases or its extension length increases.

[0073] The flexible array magnetic chuck can flexibly clamp the unprocessed lower end face of the workpiece 600 through the magnetic pole units 330, which can maximize the contact area with the first end plate 620 and reduce the deformation of the workpiece 600. Specifically, among the multiple magnetic pole units 330 arranged in an array, each magnetic pole unit 330 can automatically adjust its height according to the structure of the first end plate 620 at its corresponding position to adapt to the concavity and convexity of the lower end face of the first end plate 620.

[0074] The limiting unit 340 can prevent the workpiece 600 from pressing the upper slider 331 to the lower limit. The support surface of the limiting unit 340 is located between the upper limit and the lower limit of the upper slider 331, preferably in the middle of the upper limit and the lower limit of the upper slider 331. When the upper slider 331 is lower than the support surface of the limiting unit 340, the limiting unit 340 plays a hard support role at the lower end of the workpiece 600, preventing the workpiece 600 from continuing to press down on the upper slider 331.

[0075] A probe is fixed on the piston rod of the hydraulic adjusting top 350, and the extension of the probe is adjustable under hydraulic pressure. Multiple hydraulic adjusting tops 350 cooperate to support the underside of the workpiece 600, which can align and level the workpiece 600. At the same time, the hydraulic adjusting tops 350 can also adjust the distance between the workpiece 600 and the worktable 500, that is, the height of the workpiece 600, to ensure that the workpiece 600 is positioned at a suitable height, that is, the area between the upper limit of the upper slider 331 and the support surface of the limit unit 340.

[0076] In use, the workpiece 600 is placed directly on the magnetic pole unit 330 of the flexible array magnetic chuck. Then, the height of the workpiece 600 is adjusted and aligned by adjusting the probe extension length of the hydraulic adjustment top 350. During this process, the magnetic pole unit 330 of the flexible array magnetic chuck remains close to the workpiece 600, supporting it. After the workpiece 600 is aligned, the pressure supply to the hydraulic adjustment top 350 is stopped, and the flexible array magnetic chuck is energized. The upper slider 331, which is in contact with the workpiece 600, not only attracts the fixing block 332, fixing the relative position between the upper slider 331 and the fixing block 332, thus maintaining support for the workpiece 600, but also the magnetic force generated by the upper slider 331 exerts a pulling force on the workpiece 600, achieving the effect of fastening the workpiece 600.

[0077] like Figure 5As shown, the front-to-back adjustment mechanism 200 includes a bottom support plate 210, linear guide rails 220, linear guide sliders 230, a first lead screw nut 240, a first lead screw 250, a first reducer flange 260, a first reducer 270, and a first servo motor 280. The bottom support plate 210 is fixedly mounted on the worktable 500, for example, by bolts. Two linear guide rails 220 are mounted on the bottom support plate 210 and are parallel to each other. Each linear guide rail 220 also has two linear guide sliders 230, which are fixedly connected to the lower side of the fixed seat 310; the fixed seat 310 moves synchronously with the linear guide sliders 230.

[0078] The first lead screw nut 240, the first lead screw 250, the first reducer 270, and the first servo motor 280 together form the first drive unit, which is used to drive the fixed base 310 to slide along the linear guide rail 220. Specifically, the first reducer flange 260 is fixedly installed on the bottom support plate 210, providing installation and support for the first reducer 270 and the first servo motor 280; the first reducer 270 is connected to the first lead screw 250 and the first servo motor 280; the first lead screw nut 240 cooperates with the first lead screw 250 to drive the linear guide slider 230 or the fixed base 310 to move.

[0079] As needed, a bearing seat can be provided on the bottom support plate 210. The end of the first lead screw 250 away from the first reducer 270 is mounted on the bearing seat through a bearing to ensure the stable operation of the first lead screw 250.

[0080] The front and rear adjustment mechanism 200 is independently modularly designed, allowing for separate hoisting and transportation when transferring or changing machine tools, which is flexible, convenient, and highly applicable. The linear guide rail 220 and the linear guide slider 230 are used to support and guide the flexible automatic alignment mechanism 300 to adjust its radial position, which has a large load-bearing capacity and accurate adjustment. The first servo motor 280, the first lead screw 250, and the first lead screw nut 240 drive the flexible automatic alignment mechanism 300 for precise adjustment.

[0081] like Figure 6 As shown, the automatic positioning mechanism 400 includes a second servo motor 410, a second reducer 420, a second reducer flange 430, a chuck 440, a support base 450, a second lead screw 460, and a second lead screw nut 470. The second servo motor 410, the second reducer 420, the second lead screw 460, and the second lead screw nut 470 constitute a second drive unit, which drives the chuck 440 to move relative to the support base 450.

[0082] The support base 450 is fixed to the worktable 500 by bolts. The upper side of the support base 450 is provided with a concave guide groove. The second lead screw 460 is located in the guide groove, and the second lead screw nut 470 is slidably connected to the guide groove. As the second lead screw 460 rotates, the second lead screw nut 470 slides along the guide groove. The chuck 440 is fixedly installed on the second lead screw nut 470, preferably with an adjustable position; the chuck 440 moves synchronously with the second lead screw nut 470; the chuck 440 has a radially inward or outward clamping surface.

[0083] The second reducer flange 430 is fixedly installed at one end of the guide groove, and the second reducer 420 is installed on the second reducer flange 430, which is connected to the second servo motor 410 and the second lead screw 460.

[0084] Multiple sets of automatic positioning mechanisms 400 are installed on the worktable 500. After the workpiece 600 is aligned by the flexible automatic alignment mechanism 300, the second servo motor 410 and the second reducer 420 of the multiple sets of automatic positioning mechanisms 400 are simultaneously controlled to drive four jaws 440 to move closer to the wall of the center hole 640 of the first end plate 620. The multiple jaws 440 cooperate with the wall of the center hole 640 of the first end plate 620 for positioning. This can make the wall of the center hole 640 evenly stressed, reduce the deformation of the workpiece 600, and also prevent the radial force provided by one side of the jaws 440 from being too large and affecting the support of the flexible automatic alignment mechanism 300 for the workpiece 600. The automatic positioning mechanism 400 not only positions the center of the workpiece, but also provides a clamping force to the radial direction of the workpiece 600, which supports the inner circle of the workpiece 600 and increases the rigidity of the workpiece 600 during processing.

[0085] The clamping process of the large thin-walled wind turbine casing clamping device for workpiece 600 is as follows:

[0086] Before placing the workpiece 600, the first telescopic drive element 110 and the second telescopic drive element 150 of the flexible clamping anti-deformation mechanism 100 are controlled to tighten, ensuring that the outer contour of the flexible clamping anti-deformation mechanism 100 reaches the minimum state; and according to the size of the workpiece 600, the automatic positioning mechanism 400 adjusts the position of the chuck 440 and controls the front and rear adjustment mechanism 200 to adjust the position of the flexible automatic alignment mechanism 300.

[0087] Lift the workpiece 600 to the flexible automatic alignment mechanism 300 to ensure that the lower end face of the workpiece 600 is in contact with the magnetic pole unit 330 of the flexible array magnetic chuck, and the contact area is as large as possible. At this time, the magnetic pole unit 330 is not energized.

[0088] Then, control the hydraulic adjusting top 350 to adjust the height of the workpiece 600 and align the workpiece 600; after the workpiece 600 is aligned, control multiple jaws 440 to move to achieve center positioning of the workpiece 600.

[0089] After the workpiece 600 is positioned, the control magnetic pole unit 330 is energized, and the workpiece 600 is supported and fixed by the flexible array magnetic chuck;

[0090] Finally, based on the structure of the support plate 610, the second telescopic drive element 150 is controlled to drive the radial adjustment assembly to rise to a suitable position, the first telescopic drive element 110 is opened, and the anti-deformation fixing plate 130 contacts the inner side of the support plate 610 to achieve support.

[0091] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A clamping device for a large thin-walled wind turbine casing, comprising a worktable (500); characterized in that, The workbench (500) is provided with a flexible clamping and anti-deformation mechanism (100), which includes a radial adjustment component and an axial adjustment component. The radial adjustment assembly includes a first telescopic drive element (110), an anti-deformation fixing plate (130), and an adjustable support tube (140). There are multiple first telescopic drive elements (110) and anti-deformation fixing plates (130) connected end to end in a ring. The first telescopic drive elements (110) and anti-deformation fixing plates (130) are spaced apart in the circumferential direction. The first telescopic drive elements (110) and anti-deformation fixing plates (130) that are adjacent in the circumferential direction are rotatably connected, and the rotation axis is parallel to the axial direction of the workpiece (600). The telescopic part (142) of the adjustable support tube (140) is connected to the first telescopic drive element (110) or the anti-deformation fixing plate (130). The axial adjustment assembly is mounted on the worktable (500) and is fixedly connected to the fixing part (141) of the adjustable support tube (140), and the axial distance between the radial adjustment assembly and the worktable (500) can be adjusted. The workbench (500) is equipped with multiple sets of flexible automatic alignment mechanisms (300). Each flexible automatic alignment mechanism (300) includes a fixed base (310), a flexible array magnetic chuck, and a hydraulic adjustment top (350). The fixed base (310) is used to connect the workbench (500). The flexible array magnetic chuck includes multiple magnetic pole units (330) and a base (320). The base (320) is fixedly installed on the fixed base (310), and the multiple magnetic pole units (330) are arranged in an array on the base (320). The hydraulic adjustment top (350) is installed on the fixed base (310). A front-to-back adjustment mechanism (200) is provided between the worktable (500) and the flexible automatic alignment mechanism (300) to control the radial position of the flexible automatic alignment mechanism (300); the front-to-back adjustment mechanism (200) includes a bottom support plate (210), a linear guide rail (220), a linear guide rail slider (230), and a first drive unit; the bottom support plate (210) is fixedly installed on the worktable (500); the linear guide rail (220) is disposed on the bottom support plate (210), and the fixed seat (310) is slidably connected to the linear guide rail (220) through the linear guide rail slider (230); the first drive unit drives the fixed seat (310) to slide along the linear guide rail (220); The worktable (500) is provided with multiple sets of automatic positioning mechanisms (400), which are evenly distributed circumferentially to cooperate in center positioning of the workpiece (600). Each automatic positioning mechanism (400) includes a support base (450), a jaw (440), and a second drive unit. The support base (450) is fixed on the worktable (500), and the jaw (440) is disposed on the support base (450) and can move relative to the support base (450). The second drive unit drives the jaw (440) to move radially. The jaw (440) has a radially inward or outward clamping surface for contacting the inner or outer surface of the workpiece (600).

2. The large thin-walled wind turbine casing clamping device according to claim 1, characterized in that, The radial adjustment assembly also includes a pressure sensor located at the contact position between the anti-deformation fixing plate (130) and the workpiece (600).

3. The large thin-walled wind turbine casing clamping device according to claim 1, characterized in that, The axial adjustment assembly includes a second telescopic drive element (150), which is mounted on the worktable (500) and extends axially, with its telescopic end connected to the fixing part (141) of the adjustable support tube (140).

4. The large thin-walled wind turbine casing clamping device according to claim 3, characterized in that, The axial adjustment assembly also includes a rotary support (160), which is rotatably mounted on the worktable (500), and the fixed end of the second telescopic drive element (150) is mounted on the rotary support (160).

5. The large thin-walled wind turbine casing clamping device according to claim 1, characterized in that, The base (320) is provided with a limiting unit (340) to limit the lowest position of the workpiece (600); And / or, the magnetic pole unit (330) includes an upper slider (331) and a fixed block (332), the upper slider (331) can slide up and down along the inclined surface of the fixed block (332); the upper slider (331) has a built-in electromagnet module, and an elastic element is provided between the upper slider (331) and the fixed block (332), the elastic element applies a force to the upper slider (331) so that the upper slider (331) has a tendency to slide up along the inclined surface of the fixed block (332).

6. The large thin-walled wind turbine casing clamping device according to claim 1, characterized in that, The first drive unit includes a first lead screw nut (240) and a first lead screw (250). The first lead screw nut (240) is fixedly connected to the fixed seat (310) or the linear guide slider (230). The first lead screw (250) drives the first lead screw nut (240) to move radially.

7. The large thin-walled wind turbine casing clamping device according to claim 1, characterized in that, The second drive unit includes a second lead screw (460) and a second lead screw nut (470). The support base (450) is provided with a guide groove. The second lead screw (460) is located in the guide groove. The second lead screw nut (470) is slidably connected to the guide groove. The pawl (440) is fixedly installed on the second lead screw nut (470).

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