An adaptive clamping device for blade edge machining

Abstract

The present application relates to a kind of adaptive clamping devices for blade edge processing before edge covering.The left and right ends of the adaptive clamping device are adaptive left clamping positioning unit and right clamping positioning unit, which can be adjusted according to the deformation of the blade edge blank, and the two ends of the blade edge are clamped;There are fixed support plate clamping units in front and back, adjustable auxiliary support is installed on the front support plate and the rear support plate, then a clamping positioning mechanism that meets the adaptive processing of the blade edge covering is formed, the limit is tightened according to the blade edge profile, to realize the adaptive clamping of the blade edge covering, enhance the rigidity of the blade edge covering, and reduce the deformation caused by clamping to the blade edge covering.

Description

TECHNICAL FIELD

[0001] The present application belongs to the field of mechanical processing of aero-engine blades, and particularly relates to a self-adaptive clamping device for processing a blade shroud front edge. BACKGROUND

[0002] In order to reduce the weight of an aero-engine, a composite material fan blade part is developed, and a matched metal front edge (usually titanium alloy) is bonded on the front edge of the blade part for protecting the composite material base, which is called a blade shroud.

[0003] Since the blade shroud is a thin-walled structure (thickness is only 0.4 mm) containing an inner cavity, the difference of the blank state of each blade shroud is large, and the non-processing area on both sides of the blade shroud cannot be clamped directly according to the theoretical shape. The traditional clamping method is prone to cause deformation of the blade shroud under stress during clamping, and thus cannot guarantee the geometric relationship and physical state of the part during processing, greatly affecting the processing quality and efficiency of the blade shroud.

[0004] At present, the main scheme of the blade shroud processing technology is the whole mechanical processing scheme. When this scheme is applied for processing, the part blank has sufficient excess amount, and process features, transmission datum, etc. can be prepared in advance, so that the self-adaptive processing technology is not needed. However, the processing cycle is long, the inner cavity processing is difficult, and the processing cost is high, which is difficult to further reduce the cost and improve the efficiency.

[0005] The inner cavity and the side wall of the blade shroud can be prepared by the plastic forming method, the outer contour of the side wall is the outer contour of the corresponding blade, the inner contour of the side wall corresponds to the outer contour of the composite material base, and the front edge of the blade shroud is processed by the mechanical processing technology. The blade shroud blank prepared by the plastic forming method has a certain deformation and has the characteristics of nearly net forming, so the processing method, equipment and the blade shroud by whole mechanical processing are different, and the clamping scheme is also greatly different.

[0006] At present, the self-adaptive clamp technology or the conformal clamp technology mostly adopts the multi-point support or conformal adsorption mode to complete the clamping of the part. The adsorption tooling is mostly used for processing thin plate parts, and the adsorbed part is always in the theoretical geometric position, not in the free state. The multi-point support tooling is mostly used for supporting one side of the thin-walled part to process the other side, and usually has a certain ability to adjust the attitude of the part.

[0007] At present, there are also two-end clamping fixtures with degrees of freedom, which are mostly used for adaptive clamping and stress release of blade parts. Each end has 1-2 degrees of freedom, which are used to adapt or release the deformation of the blade. The object of application of such fixtures is the case where the standard reference block or reference shaft is already provided at both ends, and only the deformation in the process is adapted by providing degrees of freedom. The superplastic forming of the blade cover has no clamping reference processed in advance, and therefore a clamping device with more degrees of freedom must be designed according to the actual process, so as to adapt to the changes of the blank.

[0008] In summary, the blade cover requires high clamping positioning structure due to complex profile and thin wall. The traditional clamping positioning is prone to cause clamping deformation and cannot meet the machining requirements. Therefore, it is necessary to propose an adaptive clamping device for machining the front edge of the blade cover to solve the above problems. SUMMARY

[0009] The present application mainly aims at the above problems, and proposes an adaptive clamping device for machining the front edge of the blade cover, which aims to realize adaptive clamping of the blade cover, enhance the rigidity of the blade cover, and reduce the deformation of the blade cover caused by clamping.

[0010] To achieve the above purpose, the present application provides an adaptive clamping device for machining the front edge of the blade cover, which comprises left clamping positioning units, support plate clamping units and right clamping positioning units which are sequentially clamped at the front, middle and rear positions of the blade cover.

[0011] The left clamping positioning unit comprises a left main frame, a left movement adjusting mechanism is installed on the left main frame, a movement sliding block and a longitudinal adjusting part for driving the movement sliding block to move in the longitudinal direction are arranged on the left movement adjusting mechanism, a compression movement support is arranged on the movement sliding block, a rotatable front contour compression block, a rear contour compression block and a left transverse adjusting part for driving the front contour compression block and the rear contour compression block to move in the transverse direction are installed on the compression movement support, and the front contour compression block and the rear contour compression block are respectively compressed to the front and rear end faces of the blade cover under the driving of the left transverse adjusting part.

[0012] The right clamping positioning unit comprises a right main frame, a right movement adjusting mechanism is installed on the right main frame, two compression support plates which can slide and right transverse adjusting parts for respectively driving the two compression support plates to move in the transverse direction are installed on the right movement adjusting mechanism, compression devices are respectively arranged on the two compression support plates, the compression devices have a ball socket with a ball head covered and three rotational degrees of freedom of the ball head, and the ball head has a compression head connected with the ball head on one side of the ball socket opening.

[0013] Further, a positioning base is mounted on the left main frame, and a positioning support and a pressing bolt for positioning the blade edge are mounted on the positioning base.

[0014] Further, an axle positioning base is mounted on the right main frame, and a positioning pin for cooperating with a rough positioning hole of the blade edge is mounted on the axle positioning base.

[0015] Further, the positioning pin is threadedly arranged with the axle positioning base.

[0016] Further, the support clamping unit comprises a front support plate and a rear support plate, wherein a clamping area for placing the blade edge is formed between the front support plate and the rear support plate, and auxiliary supports for side body fastening of the blade edge placed in the clamping area are arranged on the front support plate and the rear support plate respectively.

[0017] Further, the auxiliary supports are adjustable bolts threadedly arranged with the front support plate and the rear support plate respectively.

[0018] Further, a process window for preparing a process reference feature in a subsequent process is opened on the front support plate.

[0019] Further, the longitudinal adjusting component is an adjusting screw rod transversely penetrating the moving slider and threadedly connected with the moving slider, one side of the moving slider is provided with an inclined guide groove, the left moving adjusting mechanism is provided with a slide groove arranged in the longitudinal direction, the pressing movement support has an inclined guide block embedded in the inclined guide groove and a sliding step portion embedded in the slide groove.

[0020] Further, a pressing slider is arranged between the front conformal pressing block and the left transverse adjusting component and between the rear conformal pressing block and the left transverse adjusting component, the pressing slider is provided with a waist-shaped hole in the transverse direction, the pressing slider is arranged on the pressing movement support by penetrating the waist-shaped hole through a bolt, and the pressing slider has a V-shaped notch, the front conformal pressing block and the rear conformal pressing block each have an abutting portion matched with the V-shaped notch.

[0021] Further, the front conformal pressing block and the rear conformal pressing block are each provided with a waist-shaped hole, and a center shaft is penetrated through the waist-shaped hole to lock the front conformal pressing block and the rear conformal pressing block on the pressing movement support.

[0022] The above-mentioned technical solution of the present invention has the following advantages: by utilizing the adjustable position of the left and right positioning clamping units, each blade edge with different deformation can be reasonably clamped. Then, by using the support plate clamping unit set in the middle, the blade edge side is locked, which enhances the rigidity of the workpiece structure and reduces the deformation caused by clamping to the blade edge, thereby realizing high-efficiency and high-precision adaptive processing of each blade edge. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the overall structure of the blade edge adaptive clamping device of the present invention.

[0024] Figure 2 This is a schematic diagram of the overall structure of a left clamping and positioning unit according to the present invention.

[0025] Figure 3 This is a partial structural diagram of a left clamping and positioning unit according to the present invention.

[0026] Figure 4 This is a schematic diagram of the structure of a left clamping and positioning unit of the present invention, which moves in the longitudinal direction.

[0027] Figure 5 This is a three-dimensional structural diagram of a pressing motion support according to the present invention.

[0028] Figure 6 This is a schematic diagram of the structure of the clamping slider and the front conformal clamping block of the present invention.

[0029] Figure 7 This is a three-dimensional structural diagram of a right-side clamping and positioning unit according to the present invention.

[0030] Figure 8 This is a partial cross-sectional view of a right clamping and positioning unit according to the present invention.

[0031] Figure 9 This is a partial structural diagram of a right-side clamping and positioning unit according to the present invention.

[0032] In the picture:

[0033] 1. Fixture base;

[0034] 2. Left clamping and positioning unit; 20. Left main frame; 21. Left moving adjustment mechanism; 22. Moving slider; 23. Longitudinal adjustment component; 24. Pressing motion support; 25. Pressing slider; 26. Front conformal pressing block; 27. Rear conformal pressing block; 28. Left lateral adjustment component; 29. ​​Positioning base; 210. Slide groove; 220. Inclined guide groove; 240. Inclined guide block; 241. Sliding step; 250. V-groove; 260. Support part; 261. Central shaft; 291. Positioning support; 292. Pressing bolt;

[0035] 3, support plate clamping unit; 30, front support plate; 31, rear support plate; 32, auxiliary support;

[0036] 4, right clamping positioning unit; 40, right main body frame; 41, right movement adjusting mechanism; 42, pressing support plate; 43, right transverse adjusting component; 44, pressing device; 45, ball head; 46, pressing head; 47, shaft positioning base; 471, positioning pin. DETAILED DESCRIPTION

[0037] The specific embodiments of the present application will be further described in detail below with reference to the accompanying drawings and examples. The following examples are used to illustrate the present application, but are not used to limit the scope of the present application.

[0038] In the description of the present application, it should be understood that the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application. In addition, the terms "first" and "second" are only for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0039] In the description of the present application, it should be noted that unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connection" should be understood in a broad sense, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the communication inside two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0040] The technical solutions of the present application will be described below with reference to an adaptive clamping device for blade edge processing disclosed in the present application.

[0041] According to examples of the present application, the adaptive clamping device for blade edge processing can include a clamping base 1 forming its base, and a left clamping positioning unit 2, a support plate clamping unit 3 and a right clamping positioning unit 4 arranged on the clamping base 1, wherein the left clamping positioning unit 2, the support plate clamping unit 3 and the right clamping positioning unit 4 clamp the front, middle and rear positions of the plastic formed blade edge in sequence. Figures 1-9 Referring to

[0042] Figures 2-6 ​The left clamping positioning unit 2 comprises a left main body frame 20, a left moving adjusting mechanism 21, a sliding block 22, a longitudinal adjusting component 23, a pressing movement support 24, a pressing block 25, a front profiled pressing block 26, a rear profiled pressing block 27, a left transverse adjusting component 28, and a positioning base 29.

[0043] The left main body frame 20 is processed by welding and machining, and the left moving adjusting mechanism 21 and the positioning base 29 of the process table are installed thereon; the positioning base 29 of the process table is installed with the adjustable positioning support 291 of the process table and the pressing bolt 12 of the process table, which is used to install the process datum used in the plastic forming process in the initial state, and is beneficial to ensure that the rough datum in the machining process is consistent with the datum in the plastic forming.

[0044] Please refer to Figure 4 、 Figure 5 The left moving adjusting mechanism 21 is provided with the longitudinal adjusting component 23, which is used to drive the pressing movement support 24 to realize longitudinal movement. Preferably, the longitudinal adjusting component 23 can be an adjusting screw, which penetrates or partially penetrates the sliding block 22 and is threadedly arranged in the sliding block 22. The front side end surface of the sliding block 22 is provided with an inclined guide groove 220, which can be an inclined dovetail groove guide rail. The left moving adjusting mechanism 21 is provided with a sliding groove 210 arranged in the longitudinal direction. The pressing movement support 24 has an inclined guide block 240 embedded in the inclined guide groove 220, and has a sliding step portion 241 embedded in the sliding groove 210. During adjustment, the adjusting screw can be rotated, and the threaded arrangement converts the rotary motion into the horizontal movement of the sliding block 22. It should be noted that the sliding block 22 is limited in the rotational direction in the left moving adjusting mechanism 21, so that under the rotation of the adjusting screw, the transverse movement along the length direction of the adjusting screw can be realized. Due to the arrangement of the inclined guide groove 220, the inclined guide block 240, the sliding groove 210 and the sliding step portion 241, the transverse movement is converted into the longitudinal movement, and the longitudinal movement of the pressing movement support 24 is realized.

[0045] In the above embodiment, the pressing motion support 24 is provided with a pressing sliding block 25, a front profiled pressing block 26, a rear profiled pressing block 27, and a left transverse adjusting component 28. In the preferred example of the left transverse adjusting component 28, a pressing bolt is used to threadedly connect the pressing motion support 24 and the pressing sliding block 25, or the end of the pressing bolt is threadedly connected with the pressing motion support 24 and pushes the pressing sliding block 25, so that the pressing sliding block 25 is driven by the pressing bolt to move in the transverse direction. A waist-shaped hole is formed in the end surface of the pressing sliding block 25 in the transverse direction. The pressing sliding block 25 is installed on the pressing motion support 24 by means of the bolt passing through the waist-shaped hole. The front end of the pressing sliding block 25 is provided with a V-shaped notch 250. The front profiled pressing block 26 and the rear profiled pressing block 27 are provided with abutting portions 260 matched with the V-shaped notch 250. The front profiled pressing block 26 and the rear profiled pressing block 27 are provided with waist-shaped holes. A central shaft 261 is passed through the waist-shaped holes to lock the front profiled pressing block 26 and the rear profiled pressing block 27 on the pressing motion support 24, so that the front profiled pressing block 26 and the rear profiled pressing block 27 have the ability to adjust the posture. The front profiled pressing block 26 and the rear profiled pressing block 27 can rotate around the central shaft 261, and can move in the transverse and longitudinal directions, respectively, to adapt to the changes of the end surface shape of the blade wrapping. By adjusting the positions and postures of the profiled pressing blocks, the profiled pressing blocks can be completely pressed on the surface of the blade blank at both ends, and the clamping of the left end of the blade wrapping is completed.

[0046] In the above embodiment, the adjustable positioning support 291 and the pressing bolt 12 of the left clamping positioning unit 2 are used to coarsely clamp the blade wrapping blank subjected to plastic forming.

[0047] In the above embodiment, the left clamping positioning unit 2 is provided with a longitudinal adjusting component 23 to provide the pressing motion support 24 with a longitudinal movement degree of freedom. The left transverse adjusting component 28 provides the front profiled pressing block 26 and the rear profiled pressing block 27 with a transverse movement degree of freedom. The central shaft 261 provides the front profiled pressing block 26 and the rear profiled pressing block 27 with a rotation degree of freedom. The left clamping positioning unit 2 is arranged at the left end of the clamping body and is used to clamp the left end of the blade wrapping (see Figure 1 ). By continuously adjusting until the front profiled pressing block 26 and the rear profiled pressing block 27 are in close contact with the profile of the blade wrapping, the position and posture are adjusted.

[0048] The composition and connection relationship of the right clamping positioning unit 4 will be described in detail below with specific examples.

[0049] Referring to Figures 7-9 , the right clamping positioning unit 4 includes a right main body frame 40, a right movement adjusting mechanism 41, a pressing support plate 42, a right transverse adjusting component 43, a pressing device 44, a ball head 45, a pressing head 46, and an axial positioning base 47.

[0050] The right main frame 40 is processed by welding and machining, and the shaft positioning base 47 and the right moving adjusting mechanism 41 are installed on the right main frame 40. The shaft positioning base 47 is provided with a positioning pin 20 which is threadedly arranged on the shaft positioning base 47, and the positioning pin 20 is used for rough clamping of the plastic formed blade cover blank, and serves as a process reference for installation of a process used in the plastic forming process, so as to facilitate keeping the rough reference in the machining consistent with the reference in the plastic forming.

[0051] The right moving adjusting mechanism 41 is provided with two slidable pressing support plates 42, and is provided with right transverse adjusting components 43 which drive the two pressing support plates 42 to move in the transverse direction, respectively. The right transverse adjusting components 43 can be adjusting screws which are threadedly arranged on the two pressing support plates 42, so as to drive the two pressing support plates 42 to move in the transverse direction.

[0052] The two pressing support plates 42 are respectively provided with pressing devices 44, and the pressing device 44 has a ball socket which covers a spherical head 45 and enables the spherical head 45 to have three rotational degrees of freedom. The spherical head 45 is provided with a pressing head 46 which is connected to the spherical head 45 on one side of the opening of the ball socket. As an example, the spherical head 45 can be an ellipsoidal head, the pressing device 44 forms an ellipsoidal ball socket, and the ellipsoidal spherical head 45 is accommodated in the ellipsoidal ball socket. The pressing device 44 enables the ball socket after accommodating the spherical head 45 to have a certain gap, so that each pressing head 46 has the posture adjusting capability of three rotational degrees of freedom. The number of the pressing heads 46 is four, and the pressing heads 46 are pressed on the right side end surface of the blade cover. Through the adjustment of the above-mentioned degrees of freedom, the pressing heads 46 can adapt to the changes of the shape of the end surface of the blade cover.

[0053] The composition and connection relationship of the support clamping unit 3 will be described in detail below in combination with specific examples.

[0054] The support clamping unit 3 includes a front support plate 30 and a rear support plate 31. The front support plate 30 and the rear support plate 31 form a clamping area for placing the blade cover between them. The front and rear ends arranged in the middle of the clamping body are used for auxiliary supporting the profile of the blade cover. Process windows can be opened on the front support plate 30 and / or the rear support plate 31. The process windows are used for preparing process reference features on the blank for subsequent processes, so as to facilitate the implementation of the machining process (see Figure 1 ). The upper end surfaces of the front and rear support plates are designed to have shapes which change with the theoretical height of the blade cover. The shapes can avoid possible collision of the tool in the machining of the leading edge of the blade cover, and provide space for the movement of the measuring head in the online measurement. The blade cover placed in the clamping area is fixed by the auxiliary supporting member 32.

[0055] In some embodiments, the auxiliary support 32 is an adjustable bolt; in some embodiments, in adaptive machining of the blade shroud, an on-machine measuring head of a machine tool is used to measure the blade shroud profile online, the position of the measuring point is designed according to the cross-sectional line of the blade, and the shroud profile is measured in the area where the front support plate 30 and the rear support plate 31 do not interfere. The measured point is used to register the part, and the machining coordinate system corresponding to the measured model of the blade shroud, the machined surface and the machining trajectory are adjusted to complete the adaptive machining of the shroud part.

[0056] The method of using the adaptive clamping device includes: first, using the positioning pin 20 to coarsely position the positioning hole of the right end surface of the blade shroud. Then, the left end of the blade shroud is positioned, and if the blade shroud cannot be positioned in a free state during clamping, the left clamping positioning unit 2 can be adjusted to easily position the blade shroud, ensuring that the clamped part is not deformed by clamping force, and then the left transverse adjustment part 28 and the pressing device 44 are tightened to press the part. Finally, after clamping the left and right ends of the blade shroud, the auxiliary support 32 on the front support plate 30 and the rear support plate 31 tightens the blade shroud, and then the blade shroud and the clamp are installed on a five-axis machine tool with a turntable, the measuring head carried by the machine tool is used to measure the blade shroud online, and adaptive adjustment is made for each blade in an adaptive manner, and the machining program is adaptively adjusted to complete adaptive machining of the part.

[0057] When the auxiliary support 32 is used to tighten the blade shroud, each adjustable bolt needs to be stopped when the dial gauge is used to measure the blade shroud at the contact point and the needle rotates and the rotation amount is not greater than 0.02 mm. Then, the points near the inlet and outlet edges are measured, adaptive registration is carried out, adaptive machining test is carried out, the relationship between the clamping and positioning of the clamping positioning mechanism for the blade shroud and the deformation of the workpiece is constructed, and efficient positioning and deformation control of the blade shroud of the aero-engine fan during machining are realized.

[0058] Through reading the above specific embodiments, those skilled in the art can easily implement the present application. However, it should be understood that the present application is not limited to this specific embodiment. On the basis of the disclosed embodiments, those skilled in the art can arbitrarily combine different technical features to realize different technical solutions, and can also combine different forms of additional functions to form other technical solutions. Therefore, the protection scope of the present application is only limited by the scope of the appended claims.

Claims

1. An adaptive clamping device for leading edge machining of a doped edge, characterized in that, The left clamping positioning unit, the support plate clamping unit and the right clamping positioning unit are sequentially clamped on the front, middle and rear positions of the blade edge covering. The left clamping positioning unit comprises a left main frame, a left movement adjusting mechanism is installed on the left main frame, a movement sliding block and a longitudinal adjusting component for driving the movement sliding block to move in the longitudinal direction are arranged on the left movement adjusting mechanism, a pressing movement support is arranged on the movement sliding block, the front and rear profiled pressing blocks are rotatably installed on the pressing movement support, and a left transverse adjusting component for driving the front and rear profiled pressing blocks to move in the transverse direction is installed on the pressing movement support, the front and rear profiled pressing blocks press the front and rear end surfaces of the blade edge covering respectively under the driving of the left transverse adjusting component. The right clamping positioning unit comprises a right main frame, a right movement adjusting mechanism is installed on the right main frame, two pressing support plates are slidably installed on the right movement adjusting mechanism, and right transverse adjusting components for driving the two pressing support plates to move in the transverse direction are installed respectively, pressing devices are arranged on the two pressing support plates respectively, the pressing devices have ball sockets for covering the ball heads and enabling the ball heads to have three degrees of rotational freedom, and the ball heads have pressing heads connected with the ball heads on the side of the ball socket openings.

2. A self adaptive clamping device for machining of leading edge of a blade wrap, as claimed in claim 1, wherein, A positioning base is installed on the left main frame, and a positioning support and a pressing bolt for positioning the blade edge covering are installed on the positioning base.

3. An adaptive clamping device for machining of a leading edge of a blade shroud according to claim 1, characterized in that An axle positioning base is installed on the right main frame, and a positioning pin for cooperating with a rough positioning hole of the blade edge covering is installed on the axle positioning base.

4. An adaptive clamping device for machining of a leading edge of a blade shroud according to claim 3, characterized in that The positioning pin is threadedly arranged with the axle positioning base.

5. An adaptive clamping device for machining of a leading edge of a blade shroud according to claim 1, characterized in that, The support plate clamping unit comprises a front support plate and a rear support plate, a clamping area for placing the blade edge covering is formed between the front support plate and the rear support plate, and auxiliary supports for fastening the blade edge covering placed in the clamping area are arranged on the front support plate and the rear support plate respectively.

6. An adaptive clamping device for machining of a leading edge of a blade shroud according to claim 5, characterized in that The auxiliary supports are adjustable bolts threadedly arranged with the front support plate and the rear support plate respectively.

7. An adaptive clamping device for machining of a leading edge of a blade shroud according to claim 5, characterized in that, A process window for preparing a process reference feature in a subsequent process is opened on the front support plate.

8. An adaptive clamping device for machining of a leading edge of a blade shroud according to claim 1, characterized in that, The longitudinal adjusting component is an adjusting screw rod transversely arranged in the movement sliding block and threadedly connected with the movement sliding block, an inclined guide groove is formed on one side of the movement sliding block, the left movement adjusting mechanism is provided with a sliding groove arranged in the longitudinal direction, the pressing movement support has an inclined guide block embedded in the inclined guide groove and a sliding step portion embedded in the sliding groove.

9. An adaptive clamping device for machining of a leading edge of a blade shroud according to claim 1, characterized in that, A pressing sliding block is arranged between the front profiled pressing block and the left transverse adjusting component and between the rear profiled pressing block and the left transverse adjusting component respectively, a waist-shaped hole is formed in the transverse direction on the pressing sliding block, the pressing sliding block is arranged on the pressing movement support by screwing the pressing sliding block through the waist-shaped hole, the pressing sliding block has a V-shaped notch, and the front profiled pressing block and the rear profiled pressing block each have an abutting portion matched with the V-shaped notch.

10. An adaptive clamping device for machining of a dished leading edge of a blade according to claim 9, characterized in that The front and rear follow-up compression blocks are provided with waist-shaped holes, and a center shaft is arranged on the waist-shaped holes to lock the front and rear follow-up compression blocks on the compression movement support.

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