Turbine blade casting mold and using method thereof

Abstract

The invention belongs to the technical field of aero-engine turbine blade precision casting, and discloses a turbine blade casting mold and a using method thereof.The mold comprises a ceramic core, an upper core head is arranged above the top of the core blade, a lower core head is arranged below the bottom of the core blade, and a first positioning structure is arranged at the position, close to the tail edge of the core, of a core blade body; a second positioning structure and a third positioning structure are arranged on the core blade basin close to the front edge of the core; a fourth positioning structure is arranged on the upper core head in the direction perpendicular to the core blade body, and a fifth positioning structure is arranged on the lower core head in the direction perpendicular to the core blade body; and a sixth positioning structure is arranged at the bottom of the mold core blade in the direction parallel to the mold core blade body. Six positioning structures are arranged on the ceramic core, a six-point positioning method is combined with a casting drawing to control the core, a core lining is omitted, the position of the core is guaranteed, the problem that the wall thickness and the size of an inner cavity are out of tolerance is solved, the size consistency of the inner cavity of the casting is guaranteed, and the qualified rate of blades is increased.

Description

Technical Field

[0001] The invention belongs to the technical field of precision casting of turbine blades of aircraft engines, and in particular relates to a turbine blade casting mold and a use method thereof. Background Art

[0002] Aircraft engine turbine blades have high requirements for wall thickness dimensional accuracy. Hollow turbine blades use a complex inner cavity cooling structure with extremely high inner cavity dimensional accuracy to achieve the expected cooling effect. The inner cavity wall thickness affects the strength of the blade and affects the service life of the blade, while the inner cavity size affects the cooling effect of the blade.

[0003] At present, the inner cavity size is solved by the core. The position of the core is related to the wall thickness and the inner cavity size position. Unreasonable control of the core position will cause the wall thickness of the casting to be out of tolerance. The inner cavity size out of tolerance will affect the service life and cooling effect of the blade.

[0004] At present, the wall thickness and inner cavity size of the casting are controlled by the core and wax mold. The core positioning mainly uses the core liner to fix the position of the core in the wax mold. The core position control is difficult, and the wall thickness and inner cavity size of the casting have a high tolerance ratio.

[0005] In summary, the aviation field urgently needs a technical solution that can solve the out-of-tolerance problem between the wall thickness and inner cavity size of hollow turbine blades. Summary of the invention

[0006] In view of the above problems, the present invention provides a turbine blade casting mold and a method for using the same, which adopts the following technical solutions: A turbine blade casting mold comprises a ceramic core, wherein the ceramic core comprises an upper core head, a lower core head, a core blade body, a core blade top, a core blade bottom, a core blade basin, a core blade back, a core leading edge and a core trailing edge; The upper core head is arranged above the top of the core blade, the lower core head is arranged below the bottom of the core blade, the core blade body is provided with a first positioning structure near the trailing edge of the core, and the core blade basin is provided with a second positioning structure and a third positioning structure near the leading edge of the core, and the first positioning structure, the second positioning structure and the third positioning structure are used to control the position of the ceramic core in the back direction of the wax mold basin; A fourth positioning structure is provided on the upper core head in a direction perpendicular to the core and blade body, and a fifth positioning structure is provided on the upper core head in a direction perpendicular to the core and blade body, wherein the fourth positioning structure and the fifth positioning structure are used to control the position of the ceramic core in the chord length direction of the wax mold; A sixth positioning structure is arranged at the bottom of the core blade in a direction parallel to the core blade body, and the sixth positioning structure is used to control the position of the ceramic core in the direction of the wax mold blade body.

[0007] Further, the second positioning structure is disposed close to the upper core head, and the third positioning structure is disposed close to the lower core head.

[0008] Furthermore, one end of the first positioning structure is connected to a reference point in the middle of the core leaf basin as a support point, one end of the second positioning structure is connected to a reference point of the core leaf basin close to the upper core head as a support point, and one end of the third positioning structure is connected to a reference point of the core leaf basin close to the lower core head as a support point.

[0009] Further, the upper core head is provided with a first opening, and the lower core head is provided with a second opening; The first opening is perpendicular to the first side surface and the second side surface of the core blade top, both of which are set as planes, the fourth positioning structure is set on the first side surface of the first opening, the second opening is perpendicular to the first side surface and the second side surface of the core blade bottom, both of which are set as planes, and the fifth positioning structure is set on the first side surface of the second opening.

[0010] Further, the first positioning structure, the second positioning structure, the third positioning structure, the fourth positioning structure, the fifth positioning structure and the sixth positioning structure are all positioning pins.

[0011] Furthermore, a first clamping structure is provided on the back of the core blade at a position opposite to the first positioning structure, a second clamping structure is provided on the back of the core blade at a position opposite to the second positioning structure, a third clamping structure is provided on the back of the core blade at a position opposite to the third positioning structure, a fourth clamping structure is provided on the second side of the first opening at a position opposite to the fourth positioning structure, a fifth clamping structure is provided on the second side of the second opening at a position opposite to the fifth positioning structure, and a sixth clamping structure is provided at the top of the core blade opposite to the sixth positioning structure.

[0012] Furthermore, one end of the first tightening structure is connected to a reference point on the back side of the blade at the trailing edge of the core as a support point, one end of the second tightening structure is connected to a reference point on the back side of the blade at the leading edge of the core close to the upper core head as a support point, and one end of the third tightening structure is connected to a reference point on the back side of the blade at the leading edge of the core close to the lower core head as a support point.

[0013] Furthermore, the first tightening structure, the second tightening structure, the third tightening structure, the fourth tightening structure, the fifth tightening structure, and the sixth tightening structure all include a tightening pin and a spring, and the spring is sleeved on the tightening pin.

[0014] Furthermore, the first positioning structure, the second positioning structure, the third positioning structure, the fourth positioning structure, the fifth positioning structure, and the sixth positioning structure are each provided with a positioning adjustment knob, and the positioning adjustment knob is rotatably connected to the adjustment panel via a thread, and the adjustment panel is provided with an adjustment scale at each of the positioning adjustment knobs.

[0015] The present invention also provides a method for using the turbine blade casting mold, comprising the following steps: Respectively obtain the theoretical coordinate values ​​of each positioning reference point where the first positioning structure, the second positioning structure, the third positioning structure, the fourth positioning structure, the fifth positioning structure, and the sixth positioning structure are connected to the ceramic core; According to the theoretical coordinate value of each positioning reference point, the size of the ceramic core is detected; According to the size detection results of the ceramic core, the deviation values ​​of the theoretical coordinates of each clamping reference point connecting the first clamping structure, the second clamping structure, the third clamping structure, the fourth clamping structure, the fifth clamping structure, and the sixth clamping structure to the ceramic core, adjust the positions of the first positioning structure, the second positioning structure, the third positioning structure, the fourth positioning structure, the fifth positioning structure, and the sixth positioning structure, and evenly divide the deviation values ​​of the theoretical coordinates of all the clamping reference points.

[0016] Beneficial effects of the present invention: The turbine blade casting mold of the present invention is provided with six positioning structures on the ceramic core, and the core is controlled by a six-point positioning method in combination with the casting drawing, the core liner is eliminated, the core position is ensured, and the wall thickness and inner cavity size tolerance are solved. The influence of human operation is reduced, the inner cavity size consistency of the casting is ensured, and the qualified rate of the blade is improved.

[0017] Other features and advantages of the present invention will be described in the following description, and partly become obvious from the description, or be understood by implementing the present invention. The purpose and other advantages of the present invention can be realized and obtained by the structures pointed out in the description and the drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0019] Figure 1 A schematic diagram of installing a ceramic core and a positioning structure according to an embodiment of the present invention is shown; Figure 2 Shows Figure 1A partial enlarged view of the middle A; Figure 3 Shows Figure 1 A partial enlarged view of point B in the middle; Figure 4 A schematic diagram of installing a ceramic core and a clamping structure according to an embodiment of the present invention is shown; Figure 5 A schematic diagram of installing a positioning adjustment knob and an adjustment panel according to an embodiment of the present invention is shown.

[0020] Figure 6 Shows Figure 5 A partial enlarged view of point C in the middle.

[0021] In the figure: 1. ceramic core; 101. upper core head; 102. lower core head; 103. core blade body; 104. core blade top; 105. core blade bottom; 106. core blade basin; 107. core blade back; 108. core leading edge; 109. core trailing edge; 4. first positioning structure; 5. second positioning structure; 6. third positioning structure; 7. fourth positioning structure; 8. fifth positioning structure; 9. sixth positioning structure; 1011. first opening; 1021. second opening; 10. first tightening structure; 11. second tightening structure; 12. third tightening structure; 13. fourth tightening structure; 14. fifth tightening structure; 15. sixth tightening structure; 16. tightening pin; 17. spring; 18. positioning adjustment knob; 19. adjustment panel; 20. adjustment scale; 21. positioning 0 point. DETAILED DESCRIPTION

[0022] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0023] It should be noted that the terms "first", "second" etc. in the present application are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequential order. It should be understood that the data used in this way can be interchanged in appropriate circumstances, so that the embodiments of the present application described here. In the present application, the orientation or positional relationship indicated by the terms "upper", "lower", "left", "right", "front", "back", "top", "bottom", "inside", "outside", "middle", "vertical", "horizontal", "lateral", "longitudinal" etc. are based on the orientation or positional relationship shown in the accompanying drawings.

[0024] The present invention provides a turbine blade casting mold and a method for using the same, which solves the problem of excessive tolerance of the wall thickness and inner cavity size of a hollow blade, can control the core in combination with a casting drawing, eliminate the core liner, ensure the position of the core, solve the problem of excessive tolerance of the wall thickness and inner cavity size, reduce the influence of human operation, ensure the consistency of the casting inner cavity size, and improve the qualified rate of blades.

[0025] like Figure 1 and Figure 4 As shown, a turbine blade casting mold includes a ceramic core 1, and the ceramic core 1 includes an upper core head 101, a lower core head 102, a core blade body 103, a core blade top 104, a core blade bottom 105, a core blade basin 106, a core blade back 107, a core leading edge 108 and a core trailing edge 109.

[0026] The upper core head 101 is arranged on the upper part of the core blade top 104 , and the lower core head 102 is arranged on the lower part of the core blade bottom 105 .

[0027] The core leaf basin 106 is provided with a first positioning structure 4 near the core trailing edge 109, and the core leaf basin 106 is provided with a second positioning structure 5 and a third positioning structure 6 near the core trailing edge 108. For example, the second positioning structure 5 is provided near the upper core head 101, and the third positioning structure 6 is provided near the lower core head 102. The first positioning structure 4, the second positioning structure 5 and the third positioning structure 6 are used to control the position of the ceramic core 1 in the back direction of the wax mold basin.

[0028] For example, one end of the first positioning structure 4 is connected to the reference point in the middle of the core leaf basin 106 as a support point, that is, the gap between the theoretical zero position of the first positioning structure 4 and the ceramic core 1 is designed to be 0 mm; one end of the second positioning structure 5 is connected to the reference point of the core leaf basin 106 close to the upper core head 101 as a support point, that is, the gap between the theoretical zero position of the second positioning structure 5 and the ceramic core 1 is designed to be 0 mm; one end of the third positioning structure 6 is connected to the reference point of the core leaf basin 106 close to the lower core head 102 as a support point, that is, the gap between the theoretical zero position of the third positioning structure 6 and the ceramic core 1 is designed to be 0 mm.

[0029] like Figure 1 and Figure 2 As shown, a fourth positioning structure 7 is provided on the upper core head 101 in a direction perpendicular to the core blade body 103. Figure 1 and Figure 3 As shown, a fifth positioning structure 8 is provided on the lower core head 102 in a direction perpendicular to the core blade body 103 , and the fourth positioning structure 7 and the fifth positioning structure 8 are used to control the position of the ceramic core 1 in the chord length direction of the wax mold.

[0030] A sixth positioning structure 9 is arranged at the core blade bottom 105 in a direction parallel to the core blade body 103 . The sixth positioning structure 9 is used to control the position of the ceramic core 1 in the direction of the wax mold blade body.

[0031] For example, the first positioning structure 4 , the second positioning structure 5 , the third positioning structure 6 , the fourth positioning structure 7 , the fifth positioning structure 8 and the sixth positioning structure 9 are all positioning pins.

[0032] like Figure 2 As shown, for example, the upper core head 101 is provided with a first opening 1011, as shown in FIG. Figure 3 As shown, a second opening 1021 is provided on the lower core head 102 , and the ceramic core 1 is connected to two ends of the inner cavity of the wax mold through the first opening 1011 and the second opening 1021 .

[0033] The first opening 1011 is perpendicular to the first side surface and the second side surface of the core blade top 104 and is set to be a plane. The fourth positioning structure 7 is set on the first side surface of the first opening 1011, and the center line of the fourth positioning structure 7 is perpendicular to the first side surface of the first opening 1011.

[0034] The second opening 1021 is perpendicular to the first side surface and the second side surface of the core blade bottom 105 and is set to be a plane. The fifth positioning structure 8 is set on the first side surface of the second opening 1021, and the center line of the third positioning structure 6 is perpendicular to the first side surface of the second opening 1021.

[0035] The present invention designs the shapes and sizes of the upper core head 101 and the lower core head 102 according to the six-point positioning requirements, and the sides of the first opening 1011 of the upper core head 101 and the second opening 1021 of the lower core head 102 are designed to be flat for positioning.

[0036] like Figure 4 As shown, for example, a first tightening structure 10 is provided at a position of the core blade back 107 opposite to the first positioning structure 4, and one end of the first tightening structure 10 is connected to a blade back side reference point at the core trailing edge 109 as a supporting point.

[0037] A second clamping structure 11 is provided on the core blade back 107 at a position opposite to the second positioning structure 5 , and one end of the second clamping structure 11 is connected to a reference point on the blade back side of the core leading edge 108 close to the upper core head 101 as a supporting point.

[0038] A third clamping structure 12 is provided on the core blade back 107 at a position opposite to the third positioning structure 6 , and one end of the third clamping structure 12 is connected to a reference point on the blade back side of the core leading edge 108 close to the lower core head 102 as a supporting point.

[0039] like Figure 2As shown, for example, a fourth tightening structure 13 is disposed on the second side surface of the first opening 1011 at a position opposite to the fourth positioning structure 7 , and a center line of the fourth tightening structure 13 is perpendicular to the second side surface of the first opening 1011 .

[0040] like Figure 3 As shown, a fifth tightening structure 14 is disposed at a position opposite to the fifth positioning structure 8 on the second side surface of the second opening 1021, and a center line of the fifth tightening structure 14 is perpendicular to the second side surface of the second opening 1021. A sixth tightening structure 15 is disposed at the core blade top 104 opposite to the sixth positioning structure 9.

[0041] For example, the first tightening structure 10, the second tightening structure 11, the third tightening structure 12, the fourth tightening structure 13, the fifth tightening structure 14, and the sixth tightening structure 15 all include a tightening pin 16 and a spring 17. The spring 17 is sleeved on the tightening pin 16, and the degree of tightening of the ceramic core 1 is controlled by the spring 17. The tightening force is adjusted according to actual needs by using different types of springs 17 to prevent the ceramic core 1 from being broken due to excessive force on the ceramic core 1 during the wax mold pressing process.

[0042] For example, the first positioning structure 4, the second positioning structure 5, the third positioning structure 6, the fourth positioning structure 7, the fifth positioning structure 8, and the sixth positioning structure 9 are all provided with positioning adjustment knobs 18, such as Figure 5 As shown, the positioning adjustment knob 18 is rotatably connected to the adjustment panel 19 through a thread. Figure 6 As shown, the adjustment panel 19 is provided with an adjustment scale 20 at each positioning adjustment knob 18 .

[0043] When the first positioning structure 4, the second positioning structure 5, the third positioning structure 6, the fourth positioning structure 7, the fifth positioning structure 8, and the sixth positioning structure 9 are at the theoretical zero position, the groove on the corresponding positioning adjustment knob 18 is flush with the positioning zero point 21 of the adjustment scale 20, ensuring that it is easy to return to zero after adjusting the position. The adjustment scale 20 is designed according to the thread pitch of the positioning adjustment knob 18, and one rotation of the positioning adjustment knob 18 is the distance of one rotation of the adjustment scale 20.

[0044] Since the preparation of the ceramic core 1 cannot meet the theoretical design, the mold surface is too thick or too thin. The present invention also provides a method for using the above-mentioned turbine blade casting mold to ensure that the wall thickness and inner cavity of the cast blade meet the tolerance requirements of the drawing.

[0045] A method for using the turbine blade casting mold comprises the following steps: S1, respectively obtain the theoretical coordinate values ​​of each positioning reference point where the first positioning structure 4, the second positioning structure 5, the third positioning structure 6, the fourth positioning structure 7, the fifth positioning structure 8, the sixth positioning structure 9 are connected to the ceramic core 1, as follows: Obtain the theoretical coordinate value of the reference point A1 where the first positioning structure 4 is connected to the ceramic core 1, the theoretical coordinate value of the reference point A2 where the second positioning structure 5 is connected to the ceramic core 1, the theoretical coordinate value of the reference point A3 where the third positioning structure 6 is connected to the ceramic core 1, the theoretical coordinate value of the reference point B4 where the fourth positioning structure 7 contacts the ceramic core 1, the theoretical coordinate value of the reference point B5 where the fifth positioning structure 8 contacts the ceramic core 1, and the theoretical coordinate value of the reference point C6 where the sixth positioning structure 9 contacts the ceramic core 1.

[0046] S2. According to the theoretical coordinate value of each positioning reference point, the size of the ceramic core 1 is detected as follows: The dimensions of the ceramic core 1 are detected based on the theoretical coordinate values ​​of reference point A1 , reference point A2 , reference point A3 , reference point B4 , reference point B5 , and reference point C6 .

[0047] S3, according to the size detection result of the ceramic core 1, the deviation value of the theoretical coordinates of each tightening reference point connected to the ceramic core 1 by the first tightening structure 10, the second tightening structure 11, the third tightening structure 12, the fourth tightening structure 13, the fifth tightening structure 14, the sixth tightening structure 15, adjust the positions of the first positioning structure 4, the second positioning structure 5, the third positioning structure 6, the fourth positioning structure 7, the fifth positioning structure 8 and the sixth positioning structure 9, and evenly divide the deviation values ​​of the theoretical coordinates of all tightening reference points, as follows: According to the size detection result of the ceramic core 1, the deviation value of the theoretical coordinates of the reference point A11 where the first clamping structure 10 is connected to the ceramic core 1, the deviation value of the theoretical coordinates of the reference point A21 where the second clamping structure 11 is connected to the ceramic core 1, the deviation value of the theoretical coordinates of the reference point A31 where the third clamping structure 12 is connected to the ceramic core 1, the deviation value of the theoretical coordinates of the reference point B41 where the fourth clamping structure 13 is in contact with the ceramic core 1, the deviation value of the theoretical coordinates of the reference point B51 where the fifth clamping structure 14 is in contact with the ceramic core 1, and the deviation value of the theoretical coordinates of the reference point B61 where the sixth clamping structure 15 is in contact with the ceramic core 1 are determined. The deviation value of the theoretical coordinates of the reference point C61 that contacts the ceramic core 1 is used to adjust the positions of the first positioning structure 4, the second positioning structure 5, the third positioning structure 6, the fourth positioning structure 7, the fifth positioning structure 8 and the sixth positioning structure 9, and evenly divide the deviation value of the theoretical coordinates of the reference point A11, the deviation value of the theoretical coordinates of the reference point A21, the deviation value of the theoretical coordinates of the reference point A31, the deviation value of the theoretical coordinates of the reference point B41, the deviation value of the theoretical coordinates of the reference point B51 and the deviation value of the theoretical coordinates of the reference point C61 to ensure that the wall thickness and the inner cavity meet the tolerance requirements of the drawing.

[0048] In the casting mold of the present invention, the ceramic core 1 is positioned by six points, and the ceramic core 1 is positioned in the vertical direction of the core (the direction of the wax mold basin back), the chord length direction (the direction of the wax mold chord length) and the blade body direction (the direction of the wax mold blade body). The position of the ceramic core 1 is controlled by six points, and the detection of the ceramic core 1 adopts the same six points positioning to establish the relationship between the size of the ceramic core 1 and the position of the wax model core. At the same time, according to the core size detection result, taking into account the basin back side wall thickness size requirements, the positioning position is fine-tuned to ensure the uniformity of the casting basin back wall thickness size and meet the drawing requirements.

[0049] Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent substitutions for some of the technical features therein; and these modifications or substitutions do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A turbine blade casting mold, characterized in that: The ceramic core (1) comprises an upper core head (101), a lower core head (102), a core blade body (103), a core blade top (104), a core blade bottom (105), a core blade basin (106), a core blade back (107), a core leading edge (108) and a core trailing edge (109); The upper core head (101) is arranged above the core blade top (104), the lower core head (102) is arranged below the core blade bottom (105), the core blade body (103) is provided with a first positioning structure (4) near the core trailing edge (109), the core blade basin (106) is provided with a second positioning structure (5) and a third positioning structure (6) near the core leading edge (108), the first positioning structure (4), the second positioning structure (5) and the third positioning structure (6) are used to control the position of the ceramic core (1) in the back direction of the wax mold basin; A fourth positioning structure (7) is provided on the upper core head (101) in a direction perpendicular to the core blade body (103), and a fifth positioning structure (8) is provided on the lower core head (102) in a direction perpendicular to the core blade body (103), wherein the fourth positioning structure (7) and the fifth positioning structure (8) are used to control the position of the ceramic core (1) in the direction of the chord length of the wax mold; A sixth positioning structure (9) is provided at the core blade bottom (105) in a direction parallel to the core blade body (103), and the sixth positioning structure (9) is used to control the position of the ceramic core (1) in the direction of the wax mold blade body.

2. The turbine blade casting mold according to claim 1, characterized in that: The second positioning structure (5) is arranged close to the upper core head (101), and the third positioning structure (6) is arranged close to the lower core head (102).

3. The turbine blade casting mold according to claim 1, characterized in that: One end of the first positioning structure (4) is connected to a reference point in the middle of the core leaf basin (106) as a support point, one end of the second positioning structure (5) is connected to a reference point of the core leaf basin (106) close to the upper core head (101) as a support point, and one end of the third positioning structure (6) is connected to a reference point of the core leaf basin (106) close to the lower core head (102) as a support point.

4. The turbine blade casting mold according to claim 1, characterized in that: The upper core head (101) is provided with a first opening (1011), and the lower core head (102) is provided with a second opening (1021); The first opening (1011) is perpendicular to the first side surface and the second side surface of the core blade top (104) and are both set as planes, the fourth positioning structure (7) is set on the first side surface of the first opening (1011), the second opening (1021) is perpendicular to the first side surface and the second side surface of the core blade bottom (105) and are both set as planes, and the fifth positioning structure (8) is set on the first side surface of the second opening (1021).

5. The turbine blade casting mold according to any one of claims 1 to 4, characterized in that: The first positioning structure (4), the second positioning structure (5), the third positioning structure (6), the fourth positioning structure (7), the fifth positioning structure (8) and the sixth positioning structure (9) are all positioning pins.

6. The turbine blade casting mold according to claim 4, characterized in that: The core blade back (107) is provided with a first tightening structure (10) at a position opposite to the first positioning structure (4), the core blade back (107) is provided with a second tightening structure (11) at a position opposite to the second positioning structure (5), the core blade back (107) is provided with a third tightening structure (12) at a position opposite to the third positioning structure (6), the second side surface of the first opening (1011) is provided with a fourth tightening structure (13) at a position opposite to the fourth positioning structure (7), the second side surface of the second opening (1021) is provided with a fifth tightening structure (14) at a position opposite to the fifth positioning structure (8), and a sixth tightening structure (15) is provided at the core blade top (104) opposite to the sixth positioning structure (9).

7. The turbine blade casting mold according to claim 6, characterized in that: One end of the first clamping structure (10) is connected to a reference point on the back side of the blade at the trailing edge (109) of the core as a support point, one end of the second clamping structure (11) is connected to a reference point on the back side of the blade at the leading edge (108) of the core close to the upper core head (101) as a support point, and one end of the third clamping structure (12) is connected to a reference point on the back side of the blade at the leading edge (108) of the core close to the lower core head (102) as a support point.

8. The turbine blade casting mold according to claim 6, characterized in that: The first tightening structure (10), the second tightening structure (11), the third tightening structure (12), the fourth tightening structure (13), the fifth tightening structure (14), and the sixth tightening structure (15) all include a tightening pin (16) and a spring (17), and the spring (17) is sleeved on the tightening pin (16).

9. The turbine blade casting mold according to claim 1, characterized in that: The first positioning structure (4), the second positioning structure (5), the third positioning structure (6), the fourth positioning structure (7), the fifth positioning structure (8), and the sixth positioning structure (9) are all provided with positioning adjustment knobs (18), and the positioning adjustment knobs (18) are rotatably connected to the adjustment panel (19) via threads, and the adjustment panel (19) is provided with an adjustment scale (20) at each of the positioning adjustment knobs (18).

10. A method for using the turbine blade casting mold according to any one of claims 1 to 9, characterized in that: The following steps are involved: Respectively obtaining the theoretical coordinate values ​​of each positioning reference point where the first positioning structure (4), the second positioning structure (5), the third positioning structure (6), the fourth positioning structure (7), the fifth positioning structure (8), and the sixth positioning structure (9) are connected to the ceramic core (1); Detecting the size of the ceramic core (1) according to the theoretical coordinate value of each positioning reference point; According to the size detection result of the ceramic core (1), the deviation value of the theoretical coordinates of each clamping reference point connected to the ceramic core (1) by the first clamping structure (10), the second clamping structure (11), the third clamping structure (12), the fourth clamping structure (13), the fifth clamping structure (14), and the sixth clamping structure (15), the positions of the first positioning structure (4), the second positioning structure (5), the third positioning structure (6), the fourth positioning structure (7), the fifth positioning structure (8), and the sixth positioning structure (9) are adjusted to evenly distribute the deviation values ​​of the theoretical coordinates of all the clamping reference points.

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