Tooling fixture and clamping method for fine forging small vane

Abstract

The embodiment of the application provides a tool clamp and a clamping method for precision forging of a small blade. The tool clamp comprises a base assembly, a positioning assembly, a clamping assembly and a pressing assembly. The base assembly comprises a back plate, a first side plate and a second side plate. The positioning assembly comprises a first center plate, a second center plate, a first bottom plate and a second bottom plate. The first bottom plate is provided with a blade pan profile positioning block. The first center plate is provided with an inlet edge positioning block. The second center plate is provided with an exhaust edge positioning block. The first bottom plate and the second bottom plate are provided with an inner edge plate positioning block. The clamping assembly comprises a blade back profile positioning block and a clamping structure. The clamping structure is used to drive the blade back profile positioning block to move close to or away from the blade pan profile positioning block. The pressing assembly comprises a pressing structure, a blade pan pressing block and a blade back pressing block. The pressing structure is used to drive the blade pan pressing block and the blade back pressing block to move. Through the processing scheme, the precision forging of the small blade can be profiled and clamped, and the machining stability and the blade tenon machining quality are improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of blade processing, in particular to a tooling fixture and a clamping method for precision forging small blades. BACKGROUND

[0002] As an important type of aero-engine blade, the precision-forged small blade is once precision-forged into a blade body without secondary processing. However, the inlet and outlet edges and tenon of the blade need to be processed twice. Since the tenon can be clamped during the processing of the inlet and outlet edges, and the tenon is relatively thick, the processing requirement can be met. However, the blade body is thin and has poor rigidity, and thus is easily deformed during clamping, which affects the processing quality of the tenon.

[0003] The traditional processing method for the blade tenon is a low-melting-point alloy pouring process and a mechanical clamping method. The low-melting-point alloy pouring process needs to process the blade twice, which is time-consuming and laborious and is likely to cause damage to the blade that is difficult to reverse. The mechanical clamping method is likely to cause non-negligible deformation of the blade, and still has the disadvantage of insufficient system rigidity. SUMMARY

[0004] Therefore, the present application provides a tooling fixture and a clamping method for precision forging small blades, which at least partially solve the problems in the prior art.

[0005] In a first aspect, the embodiments of the present application provide a tooling fixture for precision forging a small blade, which comprises a base assembly, a positioning assembly, a clamping assembly and a pressing assembly. The base assembly comprises a back plate, a first side plate and a second side plate oppositely arranged along a first direction, the back plate connecting the first side plate and the second side plate, and the back plate, the first side plate and the second side plate jointly forming an accommodating cavity. The positioning assembly is located in the accommodating cavity, and comprises a first center plate and a second center plate oppositely arranged along the first direction, and a first bottom plate and a second bottom plate oppositely arranged along a second direction, the first center plate being connected with the first side plate, the second center plate being connected with the second side plate, the first bottom plate and the second bottom plate being connected with the back plate respectively, a blade basin profile positioning block being arranged on a surface of the first bottom plate close to the second bottom plate, an inlet edge positioning block being arranged on a surface of the first center plate close to the second center plate, an exhaust edge positioning block being arranged on a surface of the second center plate close to the first center plate, and an inner edge plate positioning block being arranged on surfaces of the first bottom plate and the second bottom plate away from the back plate. The elastic modulus of the blade basin profile positioning block, the inlet edge positioning block, the exhaust edge positioning block and the inner edge plate positioning block is higher than the elastic modulus of the precision forged small blade. The clamping assembly comprises a blade back profile positioning block and a clamping structure, the blade back profile positioning block being arranged on a surface of the second bottom plate close to the first bottom plate and oppositely arranged with the blade basin profile positioning block along the second direction, and the clamping structure being used for driving the blade back profile positioning block to be close to or away from the blade basin profile positioning block. The elastic modulus of the blade back profile positioning block is lower than the elastic modulus of the precision forged small blade. The pressing assembly comprises a pressing structure, and a blade basin pressing block and a blade back pressing block oppositely arranged along the second direction, an upper surface of the blade basin pressing block being a profiling surface consistent with a blade basin theoretical profile, a lower surface of the blade back pressing block being a profiling surface consistent with a blade back theoretical profile, and the elastic modulus of the blade basin pressing block and the blade back pressing block being lower than the elastic modulus of the blade back profile positioning block. The blade basin pressing block and the blade back pressing block are provided with through holes, the blade basin profile positioning block and the blade back profile positioning block pass through the through holes, and the pressing structure is used for driving the blade basin pressing block and the blade back pressing block to move along the second direction.

[0006] According to a specific implementation manner of the embodiments of the present application, the clamping structure is a wedge block structure, the wedge block structure is arranged on the second bottom plate, the wedge block structure comprises a first wedge block, a second wedge block and a tight screw, the tight screw is connected with the first wedge block, the blade back profile positioning block is connected with the second wedge block, the first wedge block is driven to move along a third direction by rotating the tight screw, and then the second wedge block and the blade back profile positioning block are driven to move along the second direction.

[0007] According to a specific implementation manner of the embodiments of the present application, the pressing structure comprises a third bottom plate, a fourth bottom plate, a fifth bottom plate, a sixth bottom plate, a first intermediate plate, a second intermediate plate, a third intermediate plate, a fourth intermediate plate, a first pressing clamp, a second pressing clamp, a first threaded column and a second threaded column.

[0008] The first pressing clamp is connected with the surface of the back shroud away from the shroud, the second pressing clamp is connected with the surface of the back shroud away from the shroud, the first threaded column extends along the second direction and sequentially passes through the third bottom plate, the first intermediate plate, the first pressing clamp, the first center plate, the second pressing clamp, the second intermediate plate and the fourth bottom plate, and the second threaded column extends along the second direction and sequentially passes through the fifth bottom plate, the third intermediate plate, the first pressing clamp, the second center plate, the second pressing clamp, the fourth intermediate plate and the sixth bottom plate, wherein the first threaded rod and the first intermediate plate and the second intermediate plate are threadedly connected, and the second threaded rod and the third intermediate plate and the fourth intermediate plate are threadedly connected.

[0009] Both ends of the first threaded rod are fixedly connected with the drilled nut in the third bottom plate and the fourth bottom plate through fixing pins respectively, both ends of the second threaded rod are fixedly connected with the drilled nut in the fifth bottom plate and the sixth bottom plate through fixing pins respectively, the second intermediate plate and the fourth intermediate plate are provided with a clamping groove, and the first nut is arranged in the clamping groove, and the first threaded rod and the second threaded rod are connected with the first nut respectively.

[0010] According to a specific implementation manner of the embodiment of the application, the pressing structure further comprises a first sliding pipe and a second sliding pipe, the first sliding pipe sequentially passes through the third bottom plate, the first intermediate plate, the first center plate, the second intermediate plate and the fourth bottom plate, and the second sliding pipe sequentially passes through the fifth bottom plate, the third intermediate plate, the second center plate, the fourth intermediate plate and the sixth bottom plate.

[0011] According to a specific implementation manner of the embodiment of the application, the pressing structure further comprises a first conversion head and a second conversion head, the first conversion head is connected with the drilled nut in the fourth bottom plate, and the second conversion head is connected with the drilled nut in the sixth bottom plate.

[0012] According to a specific implementation manner of the embodiment of the application, the inlet edge positioning block and the outlet edge positioning block are adjustable bolt structures.

[0013] In a second aspect, the embodiment of the application provides a clamping method for a small precision-forged blade, which adopts the tooling fixture in any one of the foregoing first aspect, and the clamping method comprises the following steps.

[0014] The tooling fixture is installed on a machine tool;

[0015] The shroud of the small precision-forged blade is placed on the shroud profile positioning block, and is jointly positioned by the inner edge plate positioning block, the inlet edge positioning block and the outlet edge positioning block;

[0016] The clamping structure is controlled to drive the back shroud profile positioning block to approach the shroud profile positioning block, so that the back shroud profile positioning block is located at the shroud of the small precision-forged blade;

[0017] The control compression structure drives the leaf basin pressing block and the leaf back pressing block to move along the second direction, so that the leaf basin pressing block abuts against the leaf basin surface of the precision-forged small blade, and the leaf back pressing block abuts against the leaf back surface of the precision-forged small blade.

[0018] In the clamping process of the precision-forged small blade, the tooling fixture in the embodiment of the application first positions the precision-forged small blade through the leaf basin profile positioning block, the inner edge plate positioning block, the air inlet edge positioning block, and the air outlet edge positioning block, then drives the leaf back profile positioning block to be close to the leaf basin profile positioning block through the clamping structure to clamp the precision-forged small blade, and then drives the leaf basin pressing block and the leaf back pressing block through the compression structure, so that the leaf basin pressing block and the leaf back pressing block are pressed against the leaf basin surface and the leaf back surface respectively to further press the precision-forged small blade. Through the two-stage fixing method of profile clamping and profile pressing of the precision-forged small blade, the system stiffness of the blade body of the precision-forged small blade is increased, and the machining stability and the blade tenon machining quality are improved. BRIEF DESCRIPTION OF DRAWINGS

[0019] In order to more clearly illustrate the technical solutions of the embodiments of the application, the drawings needed in the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the application, and other drawings can be obtained by those skilled in the art without creative labor.

[0020] Figure 1 A structural schematic diagram of a tooling fixture provided for the first aspect embodiment of the application is shown in the figure.

[0021] Figure 2 A partial structural schematic diagram of a tooling fixture provided for the first aspect embodiment of the application is shown in the figure.

[0022] Figure 3 A-A sectional view is shown in the figure.

[0023] Figure 4 B-B sectional view is shown in the figure.

[0024] Figure 5 A flowchart of a clamping method of a precision-forged small blade of the application is shown in the figure.

[0025] Reference signs:

[0026] 100, tooling fixture; 101, back plate; 102, first side plate; 103, second side plate; 201, first center plate; 202, second center plate; 203, first bottom plate; 204, second bottom plate; 205, blade basin profile positioning block; 206, inlet edge positioning block; 207, outlet edge positioning block; 208, inner rim plate positioning block; 301, blade back profile positioning block; 302, first wedge block; 303, second wedge block; 304, set screw; 401, blade basin pressing block; 402, blade back pressing block; 403, third bottom plate; 404, fourth bottom plate; 405, fifth bottom plate; 406, sixth bottom plate; 407, first intermediate plate; 408, second intermediate plate; 409, third intermediate plate; 410, fourth intermediate plate; 411, first pressing clamp; 412, second pressing clamp; 413, first threaded column; 414, second threaded column; 415, fixing pin; 416, drilled nut; 417, first sliding rod; 418, second sliding rod; 419, first conversion head; 420, second conversion head; 421, first nut; X, first direction; Y, second direction; Z, third direction. DETAILED DESCRIPTION

[0027] The embodiments of the present application will be described in detail below with reference to the drawings.

[0028] The above embodiments are only some of the embodiments of the present application, but not all of the embodiments of the present application. The present application can also be implemented or applied through other different specific embodiments, and the details in the specification can be modified or changed based on different views and applications without departing from the spirit of the present application. It should be noted that the following embodiments and features in the embodiments can be combined with each other without conflict. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the present application.

[0029] It should be noted that the various aspects described below are within the scope of the appended claims. As will be apparent, the aspects described herein can be implemented in a wide variety of forms and that any specific structure and / or function described herein is merely illustrative. Based on the teachings provided herein one skilled in the art will appreciate that one or more aspects described herein can be implemented independently of any other aspects and that non-dependent aspects can be implemented in conjunction with each other in any way possible. For example, a device can be implemented and / or a method practiced using any number of the aspects described herein. In addition, an apparatus can be implemented and / or a method can be practiced using other structure and / or functionality in addition to or other than one or more of the aspects described herein.

[0030] It is also need to be explained that the figures provided in the following embodiments only illustrate the basic concept of the present application in a schematic way, and only show the components related to the present application in the figures, not drawn according to the number, shape and size of the components in actual implementation, the type, number and proportion of each component in actual implementation can be a random change, and the component layout type can also be more complex.

[0031] In addition, in the following description, specific details are provided in order to facilitate a thorough understanding of the examples. However, one skilled in the art will understand that the aspects described can be practiced without these specific details.

[0032] The small precision-forged blade is an important blade type of the aero-engine blade, the blade body of which is once precision-forged to form and does not need secondary processing. However, the inlet and outlet edges and the tenon thereof need secondary processing. Since the inlet and outlet edges can clamp the tenon during processing, and the tenon is relatively thick, the processing demand can be met. However, the blade body profile part is relatively thin and poor in rigidity, so the blade is extremely easy to deform during clamping, thereby affecting the processing quality of the tenon.

[0033] The traditional processing method of the blade tenon is a low-melting-point alloy pouring process and a mechanical clamping method. The low-melting-point alloy pouring process needs secondary processing on the blade itself, which is time-consuming and laborious and is easy to cause damage to the blade that is difficult to reverse. The mechanical clamping method is extremely easy to cause the blade to produce an unignorable deformation, and still has the defect of insufficient system rigidity.

[0034] To solve the above problems, the embodiments of the present application provide a tool clamp and a clamping method of a precision-forged small blade, which will be described below in combination with the accompanying drawings.

[0035] Please refer to Figures 1 to 4The embodiment of the application provides a tool clamp 100 for precision forging of a small blade, which comprises a base assembly, a positioning assembly, a clamping assembly and a pressing assembly. The base assembly comprises a back plate 101, a first side plate 102 and a second side plate 103 which are oppositely arranged along a first direction X, the back plate 101 is connected with the first side plate 102 and the second side plate 103, and the back plate 101, the first side plate 102 and the second side plate 103 jointly form a containing cavity. The positioning assembly is located in the containing cavity, and comprises a first center plate 201 and a second center plate 202 which are oppositely arranged along the first direction X, and a first bottom plate 203 and a second bottom plate 204 which are oppositely arranged along a second direction Y, the first center plate 201 is connected with the first side plate 102, the second center plate 202 is connected with the second side plate 103, the first bottom plate 203 and the second bottom plate 204 are respectively connected with the back plate 101, a blade pan profile positioning block 205 is arranged on a surface of the first bottom plate 203 close to the second bottom plate 204, an inlet edge positioning block 206 is arranged on a surface of the first center plate 201 close to the second center plate 202, an exhaust edge positioning block 207 is arranged on a surface of the second center plate 202 close to the first center plate 201, and an inner edge plate positioning block 208 is arranged on a surface of the first bottom plate 203 and the second bottom plate 204 away from the back plate 101. The clamping assembly comprises a blade back profile positioning block 301 and a clamping structure, the blade back profile positioning block 301 is arranged on a surface of the second bottom plate 204 close to the first bottom plate 203 and oppositely arranged with the blade pan profile positioning block 205 along the second direction Y, and the clamping structure is used for driving the blade back profile positioning block 301 to be close to or away from the blade pan profile positioning block 205. The pressing assembly comprises a pressing structure and a blade pan pressing block 401 and a blade back pressing block 402 which are oppositely arranged along the second direction Y, the blade pan pressing block 401 and the blade back pressing block 402 are provided with through holes, the blade pan profile positioning block 205 and the blade back profile positioning block 301 pass through the through holes, and the pressing structure is used for driving the blade pan pressing block 401 and the blade back pressing block 402 to move along the second direction Y.

[0036] Among them, the upper surface of the blade pan pressing block 401 is a profiling surface consistent with the blade pan theoretical profile, and the lower surface of the blade back pressing block 402 is a profiling surface consistent with the blade back theoretical profile. The elastic modulus of the blade pan profile positioning block 205, the inlet edge positioning block 206, the exhaust edge positioning block 207 and the inner edge plate positioning block 208 is higher than the elastic modulus of the precision-forged small blade. The elastic modulus of the blade back profile positioning block 301 is lower than the elastic modulus of the precision-forged small blade, and the elastic modulus of the blade pan pressing block 401 and the blade back pressing block 402 is lower than the elastic modulus of the blade back profile positioning block 301. In this way, the precision-forged small blade can be effectively positioned and clamped, and the blade body of the precision-forged small blade can be ensured to be undamaged.

[0037] The back plate 101 is fixedly connected with the first side plate 102 and the second side plate 103 by bolts. The first center plate 201 is threadedly fastened with the first side plate 102, and the second center plate 202 is also threadedly fastened with the second side plate 103. The vane pan profile positioning block 205 is integrally formed with or fixedly connected with the first bottom plate 203.

[0038] Optionally, the inlet edge positioning block 206 is connected with the first center plate 201 by an adjustable bolt structure, and / or the outlet edge positioning block 207 is connected with the second center plate 202 by an adjustable bolt structure, so as to facilitate positioning and adapt to various small precision-forged vanes. Optionally, during positioning of the small precision-forged vane, the vane pan profile positioning block 205, the inner edge plate positioning block 208 and the inlet edge positioning block 206 play a positioning role, and the outlet edge positioning block 207 plays an auxiliary positioning role.

[0039] According to the tooling fixture 100 provided by the embodiment of the present application, during clamping of the small precision-forged vane, the small precision-forged vane is first positioned by the vane pan profile positioning block 205, the inner edge plate positioning block 208, the inlet edge positioning block 206 and the outlet edge positioning block 207, then the vane back profile positioning block 301 is driven by the clamping structure to approach the vane pan profile positioning block 205 to clamp the small precision-forged vane, and finally the vane pan pressing block 401 and the vane back pressing block 402 are driven by the pressing structure to press the vane pan pressing block 401 and the vane back pressing block 402 against the vane pan surface and the vane back surface respectively, so as to further press the small precision-forged vane. By means of the two-stage fixing method of profile clamping and profile pressing, the system stiffness at the vane body of the small precision-forged vane is increased, and the machining stability and the vane tenon machining quality are improved.

[0040] In some optional embodiments, the clamping structure is a wedge block structure, the wedge block structure is arranged on the second bottom plate 204, the wedge block structure comprises a first wedge block 302, a second wedge block 303 and a set screw 304, the set screw 304 is connected with the first wedge block 302, the vane back profile positioning block 301 is connected with the second wedge block 303, the first wedge block 302 is driven to move along the third direction Z by rotating the set screw 304, and then the second wedge block 303 and the vane back profile positioning block 301 are driven to move along the second direction Y.

[0041] In these optional embodiments, the displacement amount of the first wedge block 302 along the third direction Z is adjusted by rotating the set screw 304, and then the displacement amount of the second wedge block 303 and the vane back profile positioning block 301 along the second direction Y is adjusted. The displacement amount of the vane back profile positioning block 301 can be changed according to the machining allowance of different vanes, so as to adapt to various specifications of small precision-forged vanes.

[0042] In some optional embodiments, the pressing structure comprises a third bottom plate 403, a fourth bottom plate 404, a fifth bottom plate 405, a sixth bottom plate 406, a first intermediate plate 407, a second intermediate plate 408, a third intermediate plate 409, a fourth intermediate plate 410, a first pressing clamp 411, a second pressing clamp 412, a first threaded rod 413, and a second threaded rod 414. The first pressing clamp 411 is connected to the surface of the leaf basin pressing block 401 away from the leaf back pressing block 402, the second pressing clamp 412 is connected to the surface of the leaf back pressing block 402 away from the leaf basin pressing block 401, the first threaded rod 413 extends along the second direction Y and sequentially passes through the third bottom plate 403, the first intermediate plate 407, the first pressing clamp 411, the first center plate 201, the second pressing clamp 412, the second intermediate plate 408, and the fourth bottom plate 404, and the second threaded rod 414 extends along the second direction Y and sequentially passes through the fifth bottom plate 405, the third intermediate plate 409, the first pressing clamp 411, the second center plate 202, the second pressing clamp 412, the fourth intermediate plate 410, and the sixth bottom plate 406. The first threaded rod and the first intermediate plate 407 are threadedly connected, and the second threaded rod and the third intermediate plate 409 and the fourth intermediate plate 410 are threadedly connected. The first threaded rod is fixedly connected to the threaded nut 416 in the third bottom plate 403 and the fourth bottom plate 404 through the fixing pin 415 at both ends, and the second threaded rod is fixedly connected to the threaded nut 416 in the fifth bottom plate 405 and the sixth bottom plate 406 through the fixing pin 415 at both ends. The second intermediate plate 408 and the fourth intermediate plate 410 are provided with a clamping groove, and the first nut 421 is arranged in the clamping groove, and the first threaded rod and the second threaded rod are connected with the first nut 421.

[0043] In these optional embodiments, the pressing structure is simple and reliable. By rotating the first threaded rod, the second intermediate plate 408 drives the second pressing clamp 412 and the leaf back pressing block 402 to move, so that the leaf back pressing block 402 is in contact with the leaf back surface of the fine-forged small blade. By rotating the second threaded rod, the third intermediate plate 409 drives the first pressing clamp 411 and the leaf basin pressing block 401 to move, so that the leaf basin pressing block 401 is in contact with the leaf basin surface of the fine-forged small blade.

[0044] In some optional embodiments, the pressing structure further comprises a first sliding pipe and a second sliding pipe. The first sliding pipe sequentially passes through the third bottom plate 403, the first intermediate plate 407, the first center plate 201, the second intermediate plate 408, and the fourth bottom plate 404, and the second sliding pipe sequentially passes through the fifth bottom plate 405, the third intermediate plate 409, the second center plate 202, the fourth intermediate plate 410, and the sixth bottom plate 406.

[0045] In these optional embodiments, the first sliding rod 417 and the second sliding rod 418 are arranged to make the whole structure more stable and enable the second intermediate plate 408 and the third intermediate plate 409 to move along the first sliding rod 417 and the second sliding rod 418 respectively, further ensuring the accuracy of movement. Optionally, the number of the first sliding rod 417 and the second sliding rod 418 is 2, and the two first sliding rods 417 are arranged on both sides of the first threaded rod along the third direction Z, and the two second sliding rods 418 are arranged on both sides of the second threaded rod along the third direction Z.

[0046] In some optional embodiments, the pressing structure further comprises a first conversion head 419 connected with the threaded nut 416 in the fourth bottom plate 404 and a second conversion head 420 connected with the threaded nut 416 in the sixth bottom plate 406.

[0047] In these optional embodiments, by arranging the first conversion head 419 and the second conversion head 420, when clamping the precision-forged small blade, the first threaded rod and the second threaded rod can be rotated by rotating the first conversion head 419 and the second conversion head 420 respectively, which is more labor-saving and does not need to borrow other tools.

[0048] Please refer to Figure 5 The second aspect of the present application provides a clamping method for a precision-forged small blade, which adopts the tooling fixture 100 of any one of the first aspect, and the clamping method comprises the following steps:

[0049] S101, installing the tooling fixture 100 on a machine tool.

[0050] S102, placing the blade basin of the precision-forged small blade on the blade basin profile positioning block 205 and positioning by the inner edge plate positioning block 208, the inlet edge positioning block 206 and the exhaust edge positioning block 207.

[0051] S103, controlling the clamping structure to drive the blade back profile positioning block 301 to approach the blade basin profile positioning block 205, so that the blade back profile positioning block 301 is located at the blade basin of the precision-forged small blade.

[0052] S104, controlling the pressing structure to drive the blade basin pressing block 401 and the blade back pressing block 402 to move along the second direction Y, so that the blade basin pressing block 401 abuts against the surface of the blade basin of the precision-forged small blade and the blade back pressing block 402 abuts against the surface of the blade back of the precision-forged small blade.

[0053] The clamping method provided by the second aspect of the present application adopts the tooling fixture 100 provided by the first aspect of the present application, has all the beneficial effects of the first aspect of the present application, and will not be described here to avoid repetition.

[0054] The above merely provides the specific implementation of the present application, but the protection scope of the present application is not limited to this. Any changes or replacements within the technical scope disclosed by the present application can be easily conceived by the person skilled in the art, and should be covered within the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A tooling fixture for closed-die swaging of small vanes, characterized by, The base assembly comprises a back plate, a first side plate and a second side plate arranged opposite to each other in a first direction, the back plate connecting the first side plate and the second side plate, the back plate, the first side plate and the second side plate forming a containing cavity; The positioning assembly is located in the containing cavity, and comprises a first center plate and a second center plate arranged opposite to each other in the first direction, and a first bottom plate and a second bottom plate arranged opposite to each other in a second direction, the first center plate being connected with the first side plate, the second center plate being connected with the second side plate, the first bottom plate and the second bottom plate being connected with the back plate respectively, a leaf basin profile positioning block being arranged on a surface of the first bottom plate close to the second bottom plate, an air inlet edge positioning block being arranged on a surface of the first center plate close to the second center plate, an air outlet edge positioning block being arranged on a surface of the second center plate close to the first center plate, and an inner edge plate positioning block being arranged on a surface of the first bottom plate and the second bottom plate away from the back plate, the elastic modulus of the leaf basin profile positioning block, the air inlet edge positioning block, the air outlet edge positioning block and the inner edge plate positioning block being higher than the elastic modulus of the small precision-forged blade; The clamping assembly comprises a leaf back profile positioning block and a clamping structure, the leaf back profile positioning block being arranged on a surface of the second bottom plate close to the first bottom plate and being arranged opposite to the leaf basin profile positioning block in the second direction, the clamping structure being used for driving the leaf back profile positioning block to move close to or away from the leaf basin profile positioning block, the elastic modulus of the leaf back profile positioning block being lower than the elastic modulus of the small precision-forged blade; The pressing assembly comprises a pressing structure, a leaf basin pressing block and a leaf back pressing block arranged opposite to each other in the second direction, the upper surface of the leaf basin pressing block being a profiling surface consistent with a leaf basin theoretical profile, the lower surface of the leaf back pressing block being a profiling surface consistent with a leaf back theoretical profile, the elastic modulus of the leaf basin pressing block and the leaf back pressing block being lower than the elastic modulus of the leaf back profile positioning block, the leaf basin pressing block and the leaf back pressing block being provided with through holes, the leaf basin profile positioning block and the leaf back profile positioning block passing through the through holes, and the pressing structure being used for driving the leaf basin pressing block and the leaf back pressing block to move in the second direction. The clamping structure is a wedge block structure, the wedge block structure being arranged on the second bottom plate, the wedge block structure comprising a first wedge block, a second wedge block and a tight screw, the tight screw being connected with the first wedge block, the leaf back profile positioning block being connected with the second wedge block, the first wedge block being driven to move in a third direction by rotating the tight screw, and then the second wedge block and the leaf back profile positioning block are driven to move in the second direction.

2. The tooling fixture of claim 1, wherein, The pressing structure comprises a third bottom plate, a fourth bottom plate, a fifth bottom plate, a sixth bottom plate, a first intermediate plate, a second intermediate plate, a third intermediate plate, a fourth intermediate plate, a first pressing clamp, a second pressing clamp, a first threaded column and a second threaded column, 3. The tooling fixture of claim 1, wherein, ​ The first pressing clamp is connected with the surface of the blade back pressing block away from the blade basin pressing block, the second pressing clamp is connected with the surface of the blade back pressing block away from the blade basin pressing block, the first threaded column extends along the second direction and sequentially passes through the third bottom plate, the first intermediate plate, the first pressing clamp, the first center plate, the second pressing clamp, the second intermediate plate and the fourth bottom plate, and the second threaded column extends along the second direction and sequentially passes through the fifth bottom plate, the third intermediate plate, the first pressing clamp, the second center plate, the second pressing clamp, the fourth intermediate plate and the sixth bottom plate, wherein the first threaded column and the first intermediate plate and the second intermediate plate are threadedly connected, and the second threaded column and the third intermediate plate and the fourth intermediate plate are threadedly connected, Both ends of the first threaded column are fixedly connected with drilled nuts located in the third bottom plate and the fourth bottom plate through fixing pins respectively, both ends of the second threaded column are fixedly connected with drilled nuts located in the fifth bottom plate and the sixth bottom plate through fixing pins respectively, the second intermediate plate and the fourth intermediate plate are provided with clamping grooves, first nuts are arranged in the clamping grooves, and the first threaded column and the second threaded column are connected with the first nuts respectively.

4. The tooling fixture of claim 3, wherein, The pressing structure further comprises a first sliding pipe and a second sliding pipe, the first sliding pipe sequentially passes through the third bottom plate, the first intermediate plate, the first center plate, the second intermediate plate and the fourth bottom plate, and the second sliding pipe sequentially passes through the fifth bottom plate, the third intermediate plate, the second center plate, the fourth intermediate plate and the sixth bottom plate.

5. The tooling fixture of claim 3, wherein, The pressing structure further comprises a first conversion head and a second conversion head, the first conversion head is connected with a drilled nut in the fourth bottom plate, and the second conversion head is connected with a drilled nut in the sixth bottom plate.

6. The tooling fixture of claim 1, wherein, The inlet edge positioning block and the exhaust edge positioning block are adjustable bolt structures.

7. A clamping method for fine-forging small blades using the tooling jig according to any one of claims 1 to 6, characterized by, The method comprises the following steps: installing the tool clamp on a machine tool; placing the blade basin of the small blade to be fine forged on the blade basin profile positioning block, and positioning the blade basin through the inner edge plate positioning block, the inlet edge positioning block and the exhaust edge positioning block; controlling the clamping structure to drive the blade back profile positioning block to move close to the blade basin profile positioning block, so that the blade back profile positioning block is located at the blade basin of the small blade to be fine forged; controlling the pressing structure to drive the blade basin pressing block and the blade back pressing block to move along the second direction, so that the blade basin pressing block abuts against the surface of the blade basin of the small blade to be fine forged, and the blade back pressing block abuts against the surface of the blade back of the small blade to be fine forged.

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