Fixing tool for platinum plating of six-joint guide blade and fixing method of fixing tool

Abstract

The invention relates to the technical field of aero-engines, and discloses a fixing tool for six-joint guide vane platinum plating and a fixing method thereof.The fixing tool comprises a support, the lower end of the support is transversely connected with a supporting plate used for placing and fixing a six-joint guide vane, and the upper end of the support is provided with a hook; the supporting plate is an arc-shaped plate, the left section and the right section of the supporting plate are arcs with the same radian and opposite opening directions, and a fixing groove is formed in the upper end face of the supporting plate and connected with a fixing block used for fixing the six-linkage guide blade. Mounting plates are further arranged on the lower portion of the support, the mounting plates are arc-shaped plates and used for mounting auxiliary anodes, the radian of the mounting plates is matched with that of the supporting plate, and the two mounting plates are in central symmetry with the midpoint of the supporting plate as the symmetry point. The auxiliary anode extends to the shielding area, so that the overall platinum plating thickness of each position of the six-joint guide blade reaches 5-8 microns, and the current density at the tip can be reduced through shielding of the supporting plate.

Description

Technical Field

[0001] The present invention relates to the technical field of aero-engines, in particular to a fixing fixture for platinum-plating six-link guide blades and a fixing method thereof. Background Art

[0002] Thermal barrier coatings (TBCs) utilize the thermal insulation and corrosion resistance of ceramics to protect the base metal, improving fuel combustion efficiency and extending the life of turbine engines. Currently, MCrAlY and platinum-modified aluminide coatings are the most commonly used bond layers in commercial TBCs. Platinum-modified aluminide coatings improve the bonding performance, oxidation resistance, hot corrosion resistance, and high-temperature cycle life of the bond layer, significantly extending the life of turbine blades. Despite the high cost of platinum, they are widely used.

[0003] However, there are still many problems in the platinum plating process of multi-linked blades: current concentration is easily generated at the tip of the multi-linked blades during platinum plating, causing burning; and the mutual shielding between the multi-linked blades makes the coating in the shielded areas too thin. Summary of the Invention

[0004] In order to solve the above problems, the technical solution adopted by the present invention is: A fixing tool for platinum plating of six-link guide blades, comprising a bracket, the lower end of which is laterally connected to a support plate for placing and fixing the six-link guide blades, the upper end of which is provided with a hook, the support plate being an arc-shaped plate, and the left and right sections being arcs with the same curvature and opposite opening directions, the upper end surface of the support plate being provided with a fixing groove, the fixing groove being connected to a fixing block for fixing the six-link guide blades; the lower portion of the bracket is further provided with a mounting plate, the mounting plate being an arc-shaped plate for mounting auxiliary anodes, the curvature of the mounting plate being adapted to the curvature of the support plate, and two mounting plates being provided and symmetrical with the midpoint of the support plate as the symmetry point.

[0005] Furthermore, there are at least two pairs of fixing slots and fixing blocks.

[0006] Furthermore, the fixing block includes a connecting portion and a stabilizing portion, wherein the lower portion of the connecting portion is fixedly connected to the fixing groove, and the upper portion of the connecting portion extends out of the fixing groove and is connected to the stabilizing portion, and the stabilizing portion is a hollow threaded sleeve.

[0007] Furthermore, the stabilizing portion is provided with a plurality of evenly arranged through holes, and the through holes penetrate the upper and lower end surfaces of the stabilizing portion.

[0008] Furthermore, a hook is provided at the lower portion of the bracket, and the hook is located above the fixing block.

[0009] Furthermore, the hook includes a fixing portion and a hook portion, wherein one end of the fixing portion is fixedly connected to the bracket, and the other end of the fixing portion is connected to the hook portion, and the hook portion is made of plastic material.

[0010] Furthermore, the end of the hook is hemispherical.

[0011] Furthermore, a mounting groove is provided on the upper end surface of the mounting plate, and two symmetrical clamping blocks are fixedly connected to the mounting groove by screws, and the clamping blocks are eccentrically installed in the mounting groove.

[0012] Furthermore, the outer wall of the clamping block is provided with a protective clamping layer.

[0013] A method for fixing a fixture for platinum-plating a six-link guide vane comprises the following steps: S1. Place the six-link guide blade on the support plate, insert the slot on the lower end surface of the large edge plate of the six-link guide blade into the fixing block, and use the stabilizing part to achieve preliminary fixation of the six-link guide blade.

[0014] S2. Move the hook of the hook into the groove on the upper end surface of the large edge plate of the six-link guide blade to further fix the six-link guide blade.

[0015] S3. Insert the lower end of the auxiliary anode into the mounting groove of the mounting plate from the shielding gap between the blades, and adjust the position of the auxiliary anode in the mounting groove. After the adjustment is completed, fix the clamp block to fix the position of the auxiliary anode and complete the fixation of the six-link guide blade.

[0016] Beneficial effects of the present invention: The underside of the large edge plate of the six-link guide blades is provided with a slot. When placing the six-link guide blades, align the slot with the fixed slot and insert the fixing block into the slot to secure the six-link guide blades. In the present invention, to ensure the stability of the six-link guide blades on the support plate, the large edge plate of the six-link guide blades is provided with at least two slots. In other words, the number of fixing slots and fixing blocks corresponds to the number of slots, with at least two pairs provided. Furthermore, the at least two fixing slots and fixing blocks enable rapid positioning of the six-link guide blades when mounted on the support plate, improving installation efficiency.

[0017] By extending the auxiliary anode into the shaded area, a local high potential point is established in the shaded area, disrupting the original potential balance. The electric field line distribution is reconstructed through the principle of potential superposition, increasing the current density in the shaded area from J0 to J=J0+ΔJ, where J0 is the current current density in the shaded area, ΔJ is the increased current density in the shaded area, and J is the increased current density in the shaded area. Furthermore, the auxiliary anode shortens the electrode spacing, significantly reducing the solution resistance and allowing more current to flow into the shaded area, allowing the overall platinum coating thickness of each six-link guide vane to reach 5-8μm.

[0018] During the fixing process, the tips of the six-link guide blades, such as the corners of the large edge plates, are placed on the support plates, and the current density is reduced by shielding the support plates. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the application and, together with the description, serve to explain the principles of the invention.

[0020] In order to more clearly illustrate the embodiments of the present application 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, for ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0021] Figure 1 It is a front view of the present invention; Figure 2 A top view of the present invention; Figure 3 It is a left side view of the present invention; Figure 4 It is a partial cross-sectional view of the connection between the fixing block and the support plate; Figure 5 for Figure 4 AA view; Figure 6 is a cross-sectional view of the hook; Figure 7 It is a cross-sectional view of the connection between the clamp block and the mounting plate; Figure 8 for Figure 7 BB view.

[0022] In the figure: 1. bracket; 2. support plate; 3. hook; 4. fixing groove; 5. fixing block; 501. connecting part; 502. stabilizing part; 503. through hole; 6. hook; 601. fixing part; 602. hook; 7. mounting plate; 8. auxiliary anode; 9. mounting groove; 10. clamping block; 11. protective clamping layer; 12. vertical bar structure. DETAILED DESCRIPTION

[0023] To make the purpose, technical solutions, and advantages of the embodiments of the present disclosure more clear, the technical solutions of the embodiments of the present disclosure will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present disclosure. Obviously, the described embodiments are part of the embodiments of the present disclosure, not all of the embodiments. Based on the described embodiments of the present disclosure, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present disclosure.

[0024] Unless otherwise defined, the technical or scientific terms used in this disclosure should have the usual meanings understood by people with ordinary skills in the field to which this disclosure belongs. The words "first", "second" and similar words used in this disclosure do not indicate any order, quantity or importance, but are only used to distinguish different components. Words such as "include" or "comprise" mean that the elements or objects appearing before the word include the elements or objects listed after the word and their equivalents, without excluding other elements or objects. "Up", "down", "left", "right" and the like are only used to indicate relative positional relationships. When the absolute position of the object being described changes, the relative positional relationship may also change accordingly.

[0025] like Figures 1-8 As shown, a fixture for platinum plating of six-link guide blades includes a bracket 1, which is made of copper. The electrical conductivity of copper is 5.96×10 7 The S / m is 18 times that of titanium and 40 times that of stainless steel, which can significantly reduce the overall resistance of the stent 1, reduce the voltage loss during platinum plating, and improve the efficiency of platinum plating. Figure 1 As shown, the front view of the bracket 1 is H-shaped, that is, it includes two mutually parallel vertical sides and one horizontal side. The lower ends of the two vertical sides of the bracket 1 are laterally connected to a support plate 2 for placing and fixing the six-link guide blades. The two ends of the support plate 2 are respectively connected to the two vertical sides in a one-to-one correspondence. A hook 3 is provided at the upper end of the vertical side of the bracket 1. When the six-link guide blades are platinum-plated, they are completely immersed in the plating solution of the electroplating chamber. Generally speaking, the electroplating chamber is a rectangular chamber with a certain depth. Multiple evenly arranged hanging rods can be set from top to bottom in the electroplating chamber. Multiple brackets 1 can be hung on each hanging rod through the hook 3, thereby realizing batch platinum plating of the six-link guide blades and improving platinum plating efficiency. The horizontal edge in the middle of the bracket 1 makes it convenient for the operator to take the bracket 1.

[0026] The support plate 2 is made of the same copper as the bracket 1. Figure 2As shown, the support plate 2 is an arc-shaped plate with the same curvature as the large edge plate of the six-link guide blade, and is used to place and support the large edge plate of the six-link guide blade. In order to improve the platinum plating efficiency of the six-link guide blade and increase the number of six-link guide blades placed on the support plate 2, the support plate 2 is a two-section arc-shaped plate, that is, the left and right sections of the support plate 2 in a top view are arcs with the same curvature and opposite opening directions, and the left and right sections of the support plate 2 are symmetrical with the midpoint of the support plate 2 as the symmetry point. When the six-link guide blade is placed on the support plate 2, both the left and right sections of the support plate 2 can hold the six-link guide blade, and the two six-link guide blades are staggered, so that two six-link guide blades can be placed in the limited space of the support plate 2, thereby improving efficiency.

[0027] like Figure 1 and Figure 4 As shown, the upper end surface of the support plate 2 for placing the six-link guide blades is provided with a fixing groove 4, and a fixing block 5 for fixing the six-link guide blades is connected to the fixing groove 4. In the present invention, a card slot is provided on the bottom surface of the large edge plate of the six-link guide blades. When placing the six-link guide blades, the card slot is aligned with the position of the fixing groove 4, and the fixing block 5 is inserted into the card slot to achieve the fixation of the six-link guide blades. In the present invention, in order to ensure the stability of the six-link guide blades on the support plate 2, at least two card slots are provided on the large edge plate of the six-link guide blades, that is, the number of the fixing grooves 4 and the fixing blocks 5 corresponds to the number of the card slots, and at least two pairs are provided. In addition, by using at least two fixing grooves 4 and the fixing blocks 5, the six-link guide blades can be quickly positioned when installed on the support plate 2, thereby improving its installation efficiency.

[0028] In order to improve the stability of the connection between the six-way guide blade and the fixed block 5, as shown in FIG. Figure 4 and Figure 5As shown, the fixing block 5 includes a connecting portion 501 and a stabilizing portion 502. The connecting portion 501 is a threaded rod, wherein the lower portion of the connecting portion 501 is fixedly connected to the fixing groove 4 by a threaded connection to ensure the stability of the connecting portion 501 and prevent the connecting portion 501 from shaking. The upper portion of the connecting portion 501 extends out of the fixing groove 4. The stabilizing portion 502 is a hollow threaded sleeve, the inner wall of which is provided with an internal thread adapted to the connecting portion 501. The stabilizing portion 502 is sheathed on the upper portion of the connecting portion 501 and is connected to the upper portion of the connecting portion 501. The outer diameter of the stabilizing portion 502 is slightly larger than the diameter of the slot, and the stabilizing portion 502 is made of a soft rubber material. When the fixing block 5 is inserted into the slot, the rubber stabilizing portion 502 has a certain degree of ductility and resilience. The stabilizing portion 502 is squeezed into the slot and, under the action of its rebound force, can be tightly attached to the slot, increasing the pressure between it and the slot, thereby increasing the friction between the stabilizing portion 502 and the slot, so that the stabilizing portion 502 cannot easily fall out of the slot, thereby ensuring the stability of the six-link guide blade. At the same time, during the insertion of the stabilizing portion 502 into the slot, the upper portion of the connecting portion 501 is also inserted into the slot simultaneously. The upper portion of the connecting portion 501 can provide support for the stabilizing portion 502, preventing the stabilizing portion 502 from shaking during the insertion process, which may cause the installation position of the six-link guide blade to shift.

[0029] During the insertion of the stabilizer 502 into the slot, a closed cavity is formed between the upper end surface of the stabilizer 502 and the slot. As the stabilizer 502 moves in the slot, the air pressure in the closed cavity gradually increases, thereby generating a pressure difference, which can cause the stabilizer 502 to be unable to be fully inserted into the slot, posing a risk of shaking. In addition, when the six-link guide blade needs to be removed, the pressure difference increases the difficulty of removal. Therefore, the stabilizer 502 is provided with a number of evenly arranged through holes 503, which pass through the upper and lower end surfaces of the stabilizer 502. The through holes 503 can connect to the closed cavity, solving the problem of air pressure difference. It should be noted that the through holes 503 are evenly arranged along the axis of the stabilizing portion 502, which can ensure the mass balance of the stabilizing portion 502 and the uniformity of the stabilizing portion 502; and when the stabilizing portion 502 is fully inserted into the slot, the stabilizing portion 502 will undergo a certain deformation, and at this time the through holes 503 will also undergo a certain deformation, so the diameter of the through holes 503 is set to an appropriate value to ensure that the through holes 503 will not be completely blocked after deformation.

[0030] After long-term use, the stabilizing part 502 will produce certain wear and tear. If it is not replaced in time, it will affect the fixing effect of the six-link guide blade; the lower part of the connecting part 501 is threadedly connected to the support plate 2, which is convenient for replacing the connecting part 501 at any time; similarly, the upper part of the connecting part 501 is threadedly connected to the stabilizing part 502, which is also convenient for replacing the stabilizing part 502 at any time.

[0031] In the present invention, in order to further fix the six-link guide blade, a hook 6 is provided at the lower part of the two vertical sides of the bracket 1 near the horizontal side, and the hook 6 includes a fixing portion 601 and a hook portion 602, wherein one end of the fixing portion 601 is fixedly connected to the bracket 1, and the other end of the fixing portion 601 is connected to the hook portion 602. The fixing portion 601 is made of the same material as the bracket 1, and is made of metal copper, which has a certain hardness to ensure the overall stability of the hook 6, and the hook portion 602 is made of a plastic material with a certain plasticity; a hook groove is also provided on the upper end surface of the large edge plate of the six-link guide blade. When the six-link guide blade is placed on the support plate 2 and the fixing block 5 is inserted into the slot, the hook portion 602 can be moved into the hook slot. During the installation of the six-link guide blade, the end of the hook 602 will first fit against the upper end surface of the large edge plate of the six-link guide blade. At this time, the hook 602 will be deformed due to the compression of the large edge plate. When the lower end surface of the six-link guide blade is installed, the operator can manually move the hook 602 into the groove to stabilize the hook 602 on the upper end surface of the large edge plate. It should be noted that in order to avoid excessive deformation of the hook 602, which may cause damage to the hook 602, the length of the downward bend of the hook 602 and the depth of the groove should not be set too large. They can be set to 2-3 mm. This can ensure that the hook 602 is effectively hooked in the groove and that the deformation of the hook 602 is within an appropriate range, thereby increasing the service life of the hook 602.

[0032] The end of the hook 602 is hemispherical. During the installation of the six-way guide blade, the hook 602 will always move back and forth in contact with the upper end surface of the large edge plate. The hemispherical end of the hook 602 can effectively avoid damage to the upper end surface of the six-way guide blade large edge plate and avoid scratching the upper end surface of the large edge plate. Of course, in order to facilitate the replacement of the hook 602, such as Figure 6 As shown, the fixing portion 601 and the hook portion 602 are fixedly connected by a threaded connection. A threaded hole is provided on the end face of the fixing portion 601, and the threaded hole is provided with an internal thread. One end of the hook portion 602 is provided with an external thread. The hook portion 602 is connected to the fixing portion 601 by adapting the internal thread and the external thread.

[0033] The lower portion of the bracket 1 is also provided with a mounting plate 7. The mounting plate 7 is an arc-shaped plate. The curvature of the mounting plate 7 matches the curvature of the support plate 2. Two mounting plates 7 are provided and are symmetrical with the midpoint of the support plate 2 as the symmetry point. One end of the mounting plate 7 is fixedly connected to the bracket 1, and the other end is fixedly connected to the midpoint of the support plate 2. The mounting plate 7 is used to mount the auxiliary anode 8. When the auxiliary anode 8 is mounted on the mounting plate 7, one end of the auxiliary anode 8 extends to the shielding area between two adjacent blades of the six-link guide vane, which can increase the current density in the shielding area. In the prior art, the electric field distribution during platinum plating follows the Laplace equation:

[0034] Where φ is the electric potential. Due to the geometric obstruction between the six-linked blades, the shielded area presents a low potential gradient, resulting in a reduced ion migration rate and limited electrode reaction kinetics. By extending the auxiliary anode 8 into the shielded area, a local high potential point can be established in the shielded area, disrupting the original potential balance. The electric field line distribution is reconstructed through the principle of potential superposition, increasing the current density in the shielded area from J0 to J=J0+ΔJ, where J0 is the current current density in the shielded area, ΔJ is the increased current density in the shielded area, and J is the increased current density in the shielded area. Furthermore, the auxiliary anode 8 shortens the electrode spacing, significantly reducing the solution resistance and allowing more current to flow to the shielded area, allowing the overall platinum coating thickness of each six-linked guide blade to reach 5-8μm.

[0035] In order to ensure that the distance between the auxiliary anode 8 extending to the surface of the shielded area and the two adjacent blades is the same, and to ensure that the electrode distance between the auxiliary anode 8 and the two adjacent blades is the same, the auxiliary anode 8 is detachably mounted on the mounting plate 7. Specifically, the upper end surface of the mounting plate 7 is provided with a mounting groove 9, and two symmetrical clamping blocks 10 are fixedly connected to the mounting groove 9 by screws. Figure 7 and Figure 8 As shown, the clamping block 10 is disc-shaped and is eccentrically mounted in the mounting groove 9 by means of screws. When the auxiliary anode 8 is installed, one end of the auxiliary anode 8 is placed between the two clamping blocks 10, and the auxiliary anode 8 is clamped and fixed by the two clamping blocks 10. When the position of the auxiliary anode 8 needs to be adjusted, the screws connecting the clamping blocks 10 can be slightly loosened to allow the clamping blocks 10 to rotate around the screws. At this time, the auxiliary anode 8 can be moved between the two clamping blocks 10 to adjust its position to ensure that the distance from the surface of the auxiliary anode 8 extending to the shielded area to the two adjacent blades is equal. During the movement of the auxiliary anode 8, the two clamping blocks 10 adapt to the rotation of the auxiliary anode 8 to ensure that the auxiliary anode 8 can be clamped. After the position adjustment of the auxiliary anode 8 is completed, the screws are tightened to fix the position of the clamping blocks 10.

[0036] In order to prevent the clamping block 10 from causing damage to the auxiliary anode 8, the outer wall of the clamping block 10 is provided with a protective clamping layer 11. The protective clamping layer 11 is made of a rubber material that is resistant to high temperature, acid and alkali, such as fluororubber, and has a certain elasticity. It can maintain stability under electroplating conditions while effectively clamping the auxiliary anode 8. In addition, the outer wall of the protective clamping layer 11 is provided with a number of vertical bar structures 12 evenly arranged along its circumferential outer wall, which are used to further increase the friction between it and the auxiliary anode 8 to ensure the stability of the auxiliary anode 8.

[0037] The cross section of the auxiliary anode 8 is bent, and the bending angle is 140°~160°. The specific bending angle is selected according to the angle between adjacent blades of the six-link guide blade, so that the part of the auxiliary anode 8 extending to the shielding area is parallel to the blade.

[0038] The auxiliary anode 8 is made of titanium alloy, and a platinum layer with a thickness of 2 microns is provided on the surface of the auxiliary anode 8. The platinum layer is used to provide platinum ions to the electroplating solution during electroplating to accelerate the platinum plating of the six-link guide vane.

[0039] During platinum plating, to prevent copper ions from the bracket 1, support plate 2, etc. from flowing into the electroplating solution, the entire tooling, except for the hook 3, auxiliary anode 8, and the contact points with the six-link guide vane, is coated with an acid- and alkali-resistant electroplating protective coating. During use, since the hook 3 will generate friction with the suspension rod in the electroplating chamber, a platinum layer is applied to both the hook 3 and the suspension rod to prevent the copper ions on the hook 3 and the suspension rod from flowing into the electroplating solution. In addition, during the fixing process, the tips of the six-link guide vanes, such as the corners of the large edge plate, are placed on the support plate 2, thereby shielding the support plate 2 and reducing the current density.

[0040] A method for fixing platinum-plated six-link guide vanes, comprising using the above-mentioned fixing fixture, and further comprising the following steps: S1. Place the six-link guide blade on the support plate 2, and insert the slot on the lower end surface of the large edge plate of the six-link guide blade into the fixing block 5, and use the stabilizing portion 502 to achieve preliminary fixation of the six-link guide blade.

[0041] S2. Move the hook portion 602 of the hook 6 into the groove on the upper end surface of the large edge plate of the six-link guide blade to further fix the six-link guide blade.

[0042] S3. Insert the lower end of the auxiliary anode 8 into the mounting groove 9 of the mounting plate 7 from the shielding gap between the blades, and adjust the position of the auxiliary anode 8 in the mounting groove 9. After the adjustment is completed, fix the clamping block 10 to fix the position of the auxiliary anode 8 and complete the fixation of the six-link guide blade.

[0043] (1) Unless otherwise defined, the same reference numerals in the embodiments of the present disclosure and the accompanying drawings represent the same meanings.

[0044] (2) The drawings of the embodiments of the present disclosure only involve structures related to the embodiments of the present disclosure. Other structures can refer to the general design.

[0045] (3) For the sake of clarity, components or regions are enlarged in the drawings used to describe the embodiments of the present disclosure. It is understood that when an element is referred to as being “on” or “under” another element, the element may be “directly on” or “under” the other element, or intervening elements may be present.

[0046] The above description is merely a specific embodiment of the present disclosure, but the scope of protection of the present disclosure is not limited thereto. Any changes or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in this disclosure should be included in the scope of protection of the present disclosure. Therefore, the scope of protection of the present disclosure should be based on the scope of protection of the claims.

Claims

1. A fixture for platinum plating of six-link guide vanes, characterized by: The invention comprises a bracket (1), wherein the lower end of the bracket (1) is laterally connected to a support plate (2) for placing and fixing the six-link guide blades, and the upper end is provided with a hook (3), the support plate (2) is an arc-shaped plate, and the left and right sections are arc-shaped with the same arc and opposite opening directions, the upper end surface of the support plate (2) is provided with a fixing groove (4), and the fixing groove (4) is connected to a fixing block (5) for fixing the six-link guide blades; the lower part of the bracket (1) is also provided with a mounting plate (7), the mounting plate (7) is an arc-shaped plate for mounting an auxiliary anode (8), the arc of the mounting plate (7) is adapted to the arc of the support plate (2), and two mounting plates (7) are provided and are symmetrical with the midpoint of the support plate (2) as the symmetrical point.

2. The fixing fixture for platinum plating of six-link guide vanes according to claim 1, characterized in that: There are at least two pairs of fixing grooves (4) and fixing blocks (5).

3. The fixture for platinum plating of six-link guide vanes according to claim 2, characterized in that: The fixing block (5) comprises a connecting portion (501) and a stabilizing portion (502), wherein the lower portion of the connecting portion (501) is fixedly connected to the fixing groove (4), and the upper portion of the connecting portion (501) extends out of the fixing groove (4) and is connected to the stabilizing portion (502), and the stabilizing portion (502) is a hollow threaded sleeve.

4. The fixture for platinum plating of six-link guide vanes according to claim 3, characterized in that: The stabilizing portion (502) is provided with a plurality of evenly arranged through holes (503), and the through holes (503) penetrate the upper and lower end surfaces of the stabilizing portion (502).

5. The fixing fixture for platinum plating of six-link guide vanes according to claim 1, characterized in that: A hook (6) is provided at the lower portion of the bracket (1), and the hook (6) is located above the fixing block (5).

6. The fixture for platinum plating of six-link guide vanes according to claim 5, characterized in that: The hook (6) comprises a fixing portion (601) and a hook portion (602), wherein one end of the fixing portion (601) is fixedly connected to the bracket (1), and the other end of the fixing portion (601) is connected to the hook portion (602), and the hook portion (602) is made of plastic material.

7. The fixture for platinum plating of six-link guide vanes according to claim 6, characterized in that: The end of the hook portion (602) is hemispherical.

8. The fixture for platinum plating of six-link guide vanes according to claim 1, characterized in that: The upper end surface of the mounting plate (7) is provided with a mounting groove (9), and two symmetrical clamping blocks (10) are fixedly connected to the mounting groove (9) by screws. The clamping blocks (10) are eccentrically mounted in the mounting groove (9).

9. The fixture for platinum plating of six-link guide vanes according to claim 8, characterized in that: The outer wall of the clamping block (10) is provided with a protective clamping layer (11).

10. A method for fixing a fixture for platinum-plating six-link guide vanes according to any one of claims 1 to 9, characterized in that: The following steps are involved: S1. Place the six-link guide blade on the support plate (2), insert the slot on the lower end surface of the large edge plate of the six-link guide blade into the fixing block (5), and use the stabilizing portion (502) to achieve preliminary fixation of the six-link guide blade; S2, moving the hook portion (602) of the hook (6) to move the hook portion (602) into the groove on the upper surface of the large edge plate of the six-link guide blade to further fix the six-link guide blade; S3. Insert the lower end of the auxiliary anode (8) into the mounting groove (9) of the mounting plate (7) from the shielding gap between the blades, and adjust the position of the auxiliary anode (8) in the mounting groove (9). After the adjustment is completed, fix the clamping block (10) to fix the position of the auxiliary anode (8) and complete the fixation of the six-link guide blade.

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