A kind of additive manufacturing blade anti-deformation heat treatment tooling

Abstract

This invention relates to a heat treatment fixture for preventing deformation of additive manufacturing blades, belonging to the technical field of heat treatment fixtures. It solves one of the problems in existing fixtures for heat treatment of additive manufacturing blades: poor control of blade deformation, easy adhesion, or poor adaptability to blades of different sizes. The heat treatment fixture for preventing deformation of additive manufacturing blades includes a bottom edge plate clamp, a top edge plate clamp, a blade body clamp, and a blade body clamp mounting rod. The bottom and top edge plate clamps are used to position and lock the upper and lower ends of the blade. The blade body clamp is mounted on the blade body clamp mounting rod, providing multi-point conformal support for the blade body. This invention achieves good anti-deformation effect, is less prone to adhesion to the blade, and has strong adaptability in the heat treatment fixture for preventing deformation of additive manufacturing blades.

Description

Technical Field

[0001] This invention relates to the technical field of processing tooling, and more particularly to a heat treatment tooling for preventing deformation of additive manufacturing blades. Background Technology

[0002] In high-temperature heat treatment, various alloy blades, such as turbine blades, are prone to deformation, mainly due to the combined effects of internal stress release and thermal stress. During pre-processing stages such as forging, casting, or additive manufacturing, blades accumulate significant residual stress. At high temperatures, the material's yield strength decreases, accelerating the release of this residual stress and causing plastic deformation such as bending and twisting. Simultaneously, unavoidable temperature gradients exist across different parts of the blade during heat treatment. Significant differences in heating and cooling rates between the surface and interior, and between thin and thick-walled regions, lead to varying degrees of thermal expansion and contraction. As a structural unit, the blade is mechanically constrained, and this deformation inconsistency generates enormous thermal stress. When this stress exceeds the material's high-temperature load-bearing limit, irreversible deformation occurs. Furthermore, during prolonged high-temperature holding periods, blades may collapse due to their own weight, and this phenomenon is exacerbated by higher temperatures and longer holding times. Under high-temperature conditions, the atomic activity at the interface between the blade and the heat treatment fixture increases significantly, facilitating interpenetration and diffusion to form a metallurgical bond, i.e., diffusion welding. This phenomenon can cause the blades to stick to the tooling, making them difficult to separate and damaging the blade surface. It may also introduce impurities or alter the local composition in the contact area, damaging the surface quality and overall performance of the blades and causing great difficulties for subsequent processing.

[0003] Traditional high-temperature heat treatment fixtures have limitations and are overly specialized. For example, the fixtures used for vacuum heat treatment of oriented / single-crystal high-temperature alloy blades require customized mold shell bottom limiting mechanisms for different blades, and are only suitable for shorter single-crystal blades. For longer turbine blades, it is difficult to control the deformation of the blade body, and the adaptability to blades of different sizes is poor. Existing heat treatment fixture baskets usually have fixed side wall heights, which makes them unsuitable for products placed above the side wall of the fixture basket. The top and bottom limiting structures are also difficult to adapt to blades of different widths and heights. Summary of the Invention

[0004] Based on the above analysis, the present invention aims to provide a heat treatment fixture for preventing deformation of additive manufacturing blades, in order to solve the problems of poor blade deformation control, easy adhesion, or poor adaptability to blades of different sizes in existing heat treatment fixtures for additive manufacturing blades.

[0005] The objective of this invention is mainly achieved through the following technical solutions: A heat treatment fixture for preventing deformation of additive manufacturing blades includes a bottom edge plate clamp, a top edge plate clamp, a blade body clamp, and a blade body clamp mounting rod. The bottom edge plate clamp and the top edge plate clamp are used to position and lock the upper and lower ends of the blade. The blade body clamp is mounted on the blade body clamp mounting rod and provides multi-point conformal support for the blade body.

[0006] Furthermore, it also includes a bottom limiting mechanism, a top limiting mechanism, and a support rod. The upper end of the support rod is connected to the top limiting mechanism, the lower end of the support rod is connected to the bottom limiting mechanism, the bottom edge plate clamp is connected to the bottom limiting mechanism, and the top edge plate clamp is connected to the top limiting mechanism. By moving the top limiting mechanism to the position of the support rod, the blades of different heights can be clamped and fixed.

[0007] Furthermore, the top edge plate clamp has the same structure as the bottom edge plate clamp.

[0008] Furthermore, the bottom limiting mechanism includes a bottom base plate, a bottom positioning hole, and a bottom limiting plate. The bottom base plate is provided with a bottom positioning hole along the horizontal direction. The bottom limiting plate is fixed in the bottom positioning hole at different positions, so that the spacing between the bottom limiting plates is adjustable, thereby limiting the bottom of blades of different sizes.

[0009] Furthermore, the bottom limiting mechanism also includes a bottom vertical plate, which is vertically fixed to the bottom limiting mechanism, and the bottom vertical plate is provided with reinforcing ribs.

[0010] Furthermore, the top limiting mechanism includes a top plate, a top limiting plate, and top limiting plate positioning holes. The top limiting plate positioning holes are located on the lower surface of the top plate. The top limiting plates are fixed in different top limiting plate positioning holes. Adjusting the distance between the top limiting plates is used to limit the top of blades of different sizes.

[0011] Furthermore, the top limiting mechanism also includes a positioning wall, which is vertically disposed on the upper surface of the tooling and is used to limit the longitudinal displacement of the top limiting mechanism.

[0012] Furthermore, the lower end of the blade clamp mounting rod is connected to the bottom limiting mechanism, and the upper end of the blade clamp mounting rod is connected to the top limiting mechanism.

[0013] Furthermore, the top edge plate clamp is detachably connected to the top limiting mechanism via bolts.

[0014] Furthermore, the bottom limiting mechanism is provided with lifting rings, which are distributed around the circumference of the bottom limiting mechanism and are used for the overall lifting operation of the tooling.

[0015] Furthermore, the blade clamp includes a longitudinal movable component, a length adjustment component, a transverse movable component, a connecting rod, and a conforming head; the longitudinal movable component and the transverse movable component are connected through the length adjustment component, and the transverse movable component is connected to the conforming head through the connecting rod; by adjusting the angles of the longitudinal and transverse movable components, and in conjunction with the extension and retraction adjustment of the length adjustment component, the conforming head can be adjusted with multiple degrees of freedom in three-dimensional space; the conforming head has a shape that matches the local curved surface of the blade.

[0016] Furthermore, the length adjustment assembly includes a telescopic cylinder and a telescopic rod. The telescopic cylinder is sleeved on the telescopic rod, and the distance between the longitudinal movable assembly and the transverse movable assembly is adjusted by adjusting the extension length of the telescopic rod over the telescopic cylinder.

[0017] Furthermore, the blade clamp also includes a fixing component, which is connected to the longitudinally movable component. The blade clamp is connected to the blade clamp mounting rod through the fixing component. The fixing component includes a positioning ring and a fastening screw. The blade clamp is sleeved on the blade clamp mounting rod through the positioning ring and is pressed and fixed by the fastening screw.

[0018] Furthermore, the longitudinal movable component includes a first hinge fork seat, a first hinge shaft, and a first hinge fork. One end of the first hinge fork is connected to the length adjustment component, and the other end of the first hinge fork is hinged to the first hinge fork seat through the first hinge shaft, so that the first hinge fork rotates in the longitudinal plane around the first hinge shaft.

[0019] Furthermore, the bottom edge plate clamp includes a connecting bolt, a connecting sleeve, a universal adjustment mechanism, and a sleeve plate; the connecting sleeve is connected to the bottom limiting mechanism; the universal adjustment mechanism is disposed between the connecting sleeve and the sleeve plate to realize multi-angle rotation adjustment of the sleeve plate; the sleeve plate is used to clamp the blade edge plate.

[0020] Furthermore, the conformal head includes a base, two sets of opposing clamping members, and a movable rod; the movable rod is disposed within the base, one end of the movable rod is connected to the connecting rod, and the other end of the movable rod is connected to the clamping member; the movable rod is used to drive the clamping member to open and close to adapt to blades with different curvatures; the clamping members are respectively hinged to two forked ends of the base for clamping the blade.

[0021] Furthermore, the base is a hollow structure, and the inner cavity of the base provides movement space for the movable rod; the base has a groove for guiding the movement of the clamping member and a bolt that mates with the groove, the bolt is fixedly connected to the clamping member, and the bolt extends into the groove and is slidably connected to the groove.

[0022] Furthermore, the base is also provided with a hinge shaft mounting groove, which extends through the length of the movable rod; one end of the movable rod is slidably connected to the hinge shaft mounting groove by a hinge shaft bolt, and the other end of the movable rod is hinged to the clamping member.

[0023] Compared with the prior art, the present invention can achieve at least one of the following beneficial effects: 1. This invention provides a heat treatment fixture for preventing deformation of additive manufacturing blades, specifically including a bottom edge plate clamp, a top edge plate clamp, a blade body clamp, and a blade body clamp mounting rod. The bottom and top edge plate clamps position and lock the upper and lower ends of the blade, constraining axial movement, circumferential torsion, and radial displacement of the blade during heat treatment, reducing overall blade twisting and bending deformation. The blade body clamp is mounted on the blade body clamp mounting rod, providing multi-point conformal support for the blade body, ensuring uniform stress distribution during high-temperature stress release, and reducing localized warping and collapse deformation of the blade body.

[0024] 2. The present invention provides a heat treatment fixture for preventing deformation of additive manufacturing blades. Through the longitudinal angle adjustment of the longitudinal moving component and the lateral angle adjustment of the lateral moving component, combined with the telescopic adjustment of the length adjustment component, the conforming head can be adjusted in three-dimensional space with multiple degrees of freedom. The conforming head fits into the complex curved surface of different blades to form multi-point conformal support, which improves the versatility of the fixture. There is no need to design a complete set of blade clamps separately for different types of blades. Ceramic patches are set between the conforming head and the blade to reduce the adhesion between the fixture and the blade.

[0025] 3. This invention achieves positioning and locking of the upper and lower ends of the blade by setting a bottom edge plate clamp in the bottom limiting mechanism and a top edge plate clamp in the top limiting mechanism. The bottom edge plate clamp and the top edge plate clamp have the same structure, making operation simple. Furthermore, the bottom edge plate clamp and the top edge plate clamp achieve rotational adjustment of the bottom edge plate clamp through a universal adjustment mechanism, allowing the sleeve to adapt to the torsion angle of the blade edge plate within a certain angle range, so that the sleeve plate is completely in contact with the surface of the lower edge plate of the blade. This solves the problem that the blade edge plate has a torsion angle and traditional clamping mechanisms cannot achieve a close fit.

[0026] In this invention, the above-described technical solutions can be combined with each other to achieve more preferred combinations. Other features and advantages of this invention will be set forth in the following description, and some advantages may become apparent from the specification or be learned by practicing the invention. The objectives and other advantages of this invention can be realized and obtained from the content specifically pointed out in the text and accompanying drawings. Attached Figure Description

[0027] The accompanying drawings are for illustrative purposes only and are not intended to limit the invention. Throughout the drawings, the same reference numerals denote the same parts.

[0028] Figure 1 This is a schematic diagram of the overall structure of the additive manufacturing blade anti-deformation heat treatment tooling in Example 1; Figure 2 This is a schematic diagram of the blade clamp structure of the additive manufacturing blade anti-deformation heat treatment tooling in Example 1; Figure 3 This is a schematic diagram of the bottom limiting mechanism structure of the additive manufacturing blade anti-deformation heat treatment tooling in Example 1; Figure 4 This is a schematic diagram of the bottom edge plate fixture structure of the additive manufacturing blade anti-deformation heat treatment tooling in Example 1; Figure 5 This is a schematic diagram of the top limiting mechanism structure of the additive manufacturing blade anti-deformation heat treatment tooling in Example 1; Figure 6 This is a schematic diagram (I) of the conformal head structure of the additive manufacturing blade anti-deformation heat treatment tooling in Example 2. Figure 7 This is a schematic diagram (II) of the conformal head structure of the additive manufacturing blade anti-deformation heat treatment tooling in Example 2. Figure 8 This is a schematic diagram (III) of the conformal head structure of the additive manufacturing blade anti-deformation heat treatment tooling in Example 2.

[0029] Figure label: 100-Bottom limiting mechanism; 101-Bottom base plate; 102-Bottom vertical plate; 103-Bottom positioning hole; 104-Bottom limiting plate; 105-Bottom clamp mounting hole; 106-Bottom positioning bolt; 200-Bottom edge plate clamp; 201-Bottom edge plate bolt; 202-Connecting sleeve; 203-Universal adjustment mechanism; 204-Sleeve plate; 205-Ceramic gasket; 300 - Top edge plate clamp; 400-Blade clamp; 401-Longitudinal moving assembly; 4011-First hinge fork seat; 4012-First hinge shaft; 4013-First hinge fork; 402-Transverse moving assembly; 4021-Second hinge fork seat; 4022-Second hinge shaft; 4023-Second hinge fork; 403-Length adjustment assembly; 4031-Telescopic cylinder; 4032-Telescopic rod; 404-Fixing assembly; 4041-Positioning ring; 4042-Fasting screw; 405-Conformal head; 4051-Base; 4052-Groove; 4053-Bolt; 4054-Hinge shaft bolt; 4055-Clamping component; 4056-Hinge shaft mounting slot; 4057-Moving rod; 406-Connecting rod; 500-Blade clamp mounting rod; 600 - Top limiting mechanism; 601 - Top plate; 602 - Positioning wall; 603 - Top limiting plate; 604 - Top limiting plate positioning hole; 605 - Top positioning bolt; 606 - Top clamp mounting hole; 700-Support Rod; 800-Hanging ring. Detailed Implementation

[0030] The preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings, which constitute a part of the present invention and are used together with the embodiments of the present invention to illustrate the principles of the present invention, but are not intended to limit the scope of the present invention.

[0031] Example 1 Specific embodiments of the present invention, such as Figure 1 As shown, this relates to a heat treatment fixture for preventing deformation of additive manufacturing blades, including a bottom edge plate clamp 200, a top edge plate clamp 300, a blade body clamp 400, and a blade body clamp mounting rod 500. The bottom edge plate clamp 200 and the top edge plate clamp 300 are used to position and lock the upper and lower ends of the blade, constraining the axial movement, circumferential torsion, and radial displacement of the blade during the heat treatment process, thereby reducing the overall twisting and bending deformation of the blade. The blade body clamp 400 is mounted on the blade body clamp mounting rod 500, and the blade body clamp 400 provides multi-point conformal support for the blade body, so that the blade body is subjected to uniform stress during the high-temperature stress release process, reducing the local warping and collapse deformation of the blade body.

[0032] Furthermore, to address the challenge of achieving multi-point conformal support for the blade's complex curved surface, such as... Figure 2 As shown, the blade clamp 400 includes a longitudinal movable component 401, a transverse movable component 402, a length adjusting component 403, a fixing component 404, a conforming head 405, and a connecting rod 406. One end of the longitudinal movable component 401 is connected to the fixing component 404, and the other end of the longitudinal movable component 401 is connected to the length adjusting component 403. One end of the transverse movable component 402 is connected to the length adjusting component 403, and the other end of the transverse movable component 402 is connected to the conforming head 405 via the connecting rod 406. Specifically, the blade clamp 400 achieves multi-point conformal support by adjusting the length and angle of the blade clamp 400 through the longitudinal movable component 401, the transverse movable component 402, and the length adjusting component 403. The longitudinal moving component 401 includes a first hinge fork seat 4011, a first hinge shaft 4012 and a first hinge fork 4013; the lateral moving component 402 includes a second hinge fork seat 4021, a second hinge shaft 4022 and a second hinge fork 4023; and the length adjusting component 403 includes a telescopic cylinder 4031 and a telescopic rod 4032.

[0033] Furthermore, to address the issue of the blade clamp's inability to adjust its horizontal degree of freedom, one end of the telescopic cylinder 4031 is connected to the first hinge fork seat 4011. The first hinge fork seat 4011 is hinged to the first hinge fork 4013 via the first hinge shaft 4012. The other end of the telescopic cylinder 4031 is fitted onto the telescopic rod 4032 and fixed with screws. The end of the telescopic rod 4032 away from the telescopic cylinder 4031 is connected to the second hinge fork 4023. The second hinge fork 4023 is hinged to the second hinge fork seat 4021 via the second hinge shaft 4022. The adjustment... The extension length of the telescopic rod 4032 over the telescopic cylinder 4031 allows for adjustment of the distance between the longitudinal movable component 401 and the transverse movable component 402, thereby enabling adjustment of the horizontal degree of freedom of the blade clamp. The connecting rod 406 is detachably connected to the conforming head 405, preferably by a threaded connection or a snap-fit ​​connection, which facilitates the replacement of the corresponding conforming head 405 according to different blade curved surfaces. Preferably, the conforming head 405 is arc-shaped, reverse-bow-shaped, etc. By tightly fitting the conforming head 405 with the blade, the blade shape is maintained, reducing deformation caused by residual printing stress and thermal stress.

[0034] Furthermore, to address the issue of the blade clamp's inability to adjust its longitudinal and lateral degrees of freedom, the first hinge fork seat 4011 has a U-shaped structure. The U-shaped opening of the first hinge fork seat 4011 is positioned along the longitudinal plane, and the extension direction of the U-shaped groove is consistent with the length direction of the blade clamp mounting rod 500. The first hinge fork 4013 has a fork-like structure and is inserted into the U-shaped groove of the first hinge fork seat 4011. The first hinge shaft 4012 passes through the corresponding holes of the first hinge fork seat 4011 and the first hinge fork 4013, allowing the first hinge fork 4013 to rotate around the first hinge shaft 4012 in the longitudinal plane. The rotation angle range is preferably 0°-90°, achieving longitudinal angle adjustment of the blade clamp 400; lateral degree of freedom... The specific implementation of the moving component 402 is the same as that of the longitudinal moving component 401, but the direction of the restricted rotation angle of the blade clamp 400 is different. The second hinge fork 4023 is inserted into the U-shaped groove of the second hinge fork seat 4021. The U-shaped opening direction of the second hinge fork seat 4021 is set along the transverse plane. The extension direction of the U-shaped groove is perpendicular to the length direction of the blade clamp mounting rod 500. The U-shaped opening direction of the second hinge fork seat 4021 is at a 90° angle to the U-shaped opening direction of the first hinge fork seat 4011. The second hinge fork 4023 can rotate around the second hinge shaft 4022 in the transverse plane through the hinge of the second hinge shaft 4022. The rotation angle range is preferably 0°-90°, thereby realizing the angle adjustment of the blade clamp 400 in the transverse direction.

[0035] It is worth noting that by adjusting the longitudinal angle of the longitudinal moving component 401 and the lateral angle of the transverse moving component 402, and in conjunction with the telescopic adjustment of the length adjusting component 403, the conformal head 405 can be adjusted in three-dimensional space with multiple degrees of freedom, so that the conformal head 405 fits the complex curved surface of the blade body, forming multi-point conformal support, reducing the universality cost of the tooling, and eliminating the need to design a complete set of blade body clamps separately for different types of blades.

[0036] Furthermore, considering the issue of stable clamping of the blade clamp, the fixing component 404 includes a positioning ring 4041 and a fastening screw 4042. The blade clamp 400 is sleeved on the blade clamp mounting rod 500 via the positioning ring 4041 and tightened and fixed by the fastening screw 4042 to achieve the fixation of the blade clamp and improve the stability of the clamp. When installing the blade clamp 400, a digital torque meter is used to determine the appropriate installation force to reduce damage to the blade due to excessive installation force or fixation failure due to insufficient installation force.

[0037] Furthermore, to address the issue of poor clamping effect of the blade bottom edge plate, such as... Figure 3 As shown, the bottom edge plate clamp 200 includes a bottom edge plate connecting bolt 201, a connecting sleeve 202, a universal adjustment mechanism 203, and a sleeve plate 204. The universal adjustment mechanism 203 is preferably a hinge assembly. The lower end of the universal adjustment mechanism 203 is fixedly connected to the top of the connecting sleeve 202, and the upper end of the universal adjustment mechanism 203 is fixedly connected to the bottom of the sleeve plate 204. The universal adjustment mechanism 203 enables the rotational adjustment of the bottom edge plate clamp 200, allowing the sleeve plate 204 to adaptively adjust the torsional angle of the blade edge plate within a certain angle range, ensuring complete contact between the sleeve plate 204 and the surface of the lower edge plate of the blade. The adaptive angle adjustment function of the universal adjustment mechanism 203 solves the problem of the blade edge plate having a torsional angle and the inability of traditional clamping mechanisms to achieve a close fit.

[0038] Furthermore, to address the issue of welding and adhesion between the clamp and the blade edge plate under high-temperature conditions, the sleeve 204 has an arc-shaped structure, and the inner side of the sleeve 204 is lined with a ceramic patch 205. The ceramic patch 205 has the characteristics of high temperature resistance and non-adhesion, which reduces the welding and adhesion between the sleeve 204 and the blade edge plate under high-temperature conditions when clamping the blade edge plate.

[0039] Furthermore, to address the issue of poor clamping effect at the blade tip, the fixture is equipped with at least one set of top edge plate clamps 300. The structure of the top edge plate clamp 300 is identical to that of the bottom edge plate clamp 200, and will not be described in detail here. The top edge plate clamp 300 is detachably connected to the top clamp mounting hole 606 via bolts (the connection method is the same as that between the bottom edge plate clamp 200 and the bottom base plate 101). The specific structure of the top edge plate clamp 300 is completely identical to that of the bottom edge plate clamp 200. The inner side of the sleeve plate of the top edge plate clamp 300 is also lined with ceramic patches to achieve close clamping of the blade's upper edge plate, reducing high-temperature welding and surface damage to the blade's upper edge plate. The top edge plate clamp 300 and the bottom edge plate clamp 200 cooperate to form an upper and lower symmetrical clamping structure, restricting the displacement and torsion of the upper and lower ends of the blade, further improving the positioning stability of the blade and reducing heat treatment deformation. This fixture is used for high-temperature heat treatment. The ceramic patch will experience slight thermal expansion in a high-temperature environment, and the bolt will undergo slight deformation due to thermal expansion and contraction, which may cause the tightening torque to deviate.

[0040] Furthermore, considering the issue of varying blade widths at the base of the blades that need to be clamped, such as... Figure 2 As shown, the tooling also includes a bottom limiting mechanism 100. The bottom limiting mechanism 100 includes a bottom base plate 101, bottom positioning holes 103, a bottom limiting plate 104, a bottom clamp mounting hole 105, and a bottom positioning bolt 106. The bottom base plate 101 is a plate-shaped structure, with multiple rows of bottom positioning holes 103 arranged laterally on its upper surface. The bottom limiting plate 104 is an L-shaped plate-shaped structure, with a through hole at its bottom matching the bottom positioning holes 103. The bottom limiting plate 104 is fixed to the bottom base plate 101 by the limiting plate positioning bolt 106. The bottom of the connecting sleeve 202 has a hole matching the bottom clamp mounting hole 105. The threaded hole allows the connecting bolt 201 to pass through the bottom clamp mounting hole 105 and threadedly connect to the connecting sleeve 202, enabling a detachable connection between the connecting sleeve 202 and the bottom base plate 101. Preferably, there are two sets of bottom limiting plates 104. The two sets of bottom limiting plates 104 can laterally limit the lower edge plate of the blade, reducing the lateral displacement of the blade bottom. Combined with the locking action of the bottom edge plate clamp 200, the bottom of the blade is positioned and clamped. By selecting different bottom positioning holes 103, the spacing between the bottom limiting plates 104 can be adjusted to accommodate blades with different edge plate widths, solving the problem that traditional tooling can only accommodate a single type of blade and has poor versatility.

[0041] Furthermore, to enhance the stability of the bottom limiting mechanism 100, the bottom limiting mechanism 100 is also provided with a bottom vertical plate 102, which is vertically fixed on the bottom base plate 101. The bottom vertical plate 102 has reinforcing ribs on its side, and the reinforcing ribs adopt a triangular structure design. The triangular structure has good load-bearing and deformation resistance, which can disperse the stress on the bottom vertical plate 102 and reduce the deformation of the bottom vertical plate 102 under high temperature environment and load conditions.

[0042] Furthermore, considering the varying widths of the blade tips that need to be clamped, such as Figure 5 As shown, the tooling is also equipped with a top limiting mechanism 600, and the blade clamp mounting rod 500 is vertically set. The lower end of the blade clamp mounting rod 500 is connected to the bottom limiting mechanism 100, and the upper end of the blade clamp mounting rod 500 is connected to the top limiting mechanism 600. The top limiting mechanism 600 includes a top plate 601, a positioning wall 602, a top limiting plate 603, a top limiting plate positioning hole 604, a top positioning bolt 605, and a top clamp mounting hole 606. The top plate 601 is a rectangular plate structure that matches the bottom base plate 101 and is made of high-temperature resistant alloy material. The positioning wall 602 is a rectangular plate structure that is vertically welded to the top plate 601. The positioning wall 602 is used to limit the longitudinal displacement of the top limiting plate 603 and improve the installation stability of the top limiting plate 603.

[0043] Specifically, the top limiting plate 603 is an L-shaped plate structure with the same structure as the bottom limiting plate 104. The top limiting plate 603 is installed on the lower surface of the top plate 601. The lower surface of the top plate 601 has multiple rows of top limiting plate positioning holes 604 evenly arranged in the transverse direction. The top of the top limiting plate 603 has a through hole that matches the top limiting plate positioning hole 604. The top positioning bolt 605 passes through the through hole of the top limiting plate 603 and the top limiting plate positioning hole 604, and is locked by a nut. The top limiting plate 603 is fixed to the top plate 601. Preferably, there are two sets of top limiting plates 603, which are symmetrically arranged on both sides of the lower surface of the top plate 601. By selecting the positioning holes 604 of the top limiting plates at different positions, the distance between the two sets of top limiting plates 603 can be adjusted. The distance adjustment of the top limiting plate 603 and the bottom limiting plate 104 is synchronized and coordinated to adapt to the upper edge plates of blades with different widths (chord lengths), so as to make the lateral limiting of the upper and lower ends of the blade consistent.

[0044] Furthermore, considering the clamping problem of the upper and lower edge plates to accommodate blades of different heights, the upper end of the support rod 700 is detachably mounted on the side of the top plate 601 by bolts. The height of the top plate 601 can be adjusted along the support rod 700. The top plate 601 has support holes that are compatible with the support rod 700 and is fixed by bolts. On the one hand, by loosening the locking nuts on the upper and lower sides of the top plate 601, the height of the top plate 601 can be adjusted up and down along the support rod 700. After adjustment to match the height of the blade to be processed, the locking nuts are fixed, thus achieving the adaptive clamping of blades of different heights. On the other hand, the support rod 700 is made of the same high-temperature resistant alloy material as the blade clamp mounting rod 500, which is not easily deformed in high-temperature environments. The lower end of the support rod 700 is connected to the bottom vertical plate 102 and fixed with screws. The support rod 700 forms a longitudinal auxiliary support, sharing the stress on the top plate 601 and the blade clamp mounting rod 500, reducing the overall deformation of the tooling in high-temperature environments, thereby reducing the impact on blade positioning.

[0045] Furthermore, considering the need for lifting during the clamping process, the bottom limiting mechanism 100 is also equipped with lifting rings 800. The lifting rings 800 are distributed around the bottom limiting mechanism 100 and are used for the overall lifting operation of the tooling and the clamped blade. This adapts to the requirements of furnace loading, unloading and other processes, improves the stability of the tooling and blade during the lifting process, and allows several tooling units to be stacked and placed into the furnace during use, thereby improving the efficiency of heat treatment.

[0046] Example 2 Specific embodiments of the present invention, such as Figure 6 As shown, in order to solve the problem of frequently changing the conformal head and the problem of the tooling adaptively clamping the blade body with different curvatures during the use of the tooling, this embodiment improves the structure of the conformal head 405 based on the first embodiment. The conformal head 405 adopts an adaptive clamping structure design, which can achieve close fitting and clamping of blade bodies with different curvatures without frequent replacement of the conformal head body, reducing the tooling cost, improving clamping efficiency, and ensuring the stability of the multi-point conformal support of the blade body.

[0047] Specifically, such as Figure 7 and Figure 8 As shown, the conformal head 405 includes a base 4051, a groove 4052, a bolt 4053, a hinge shaft bolt 4054, a clamping member 4055, a hinge shaft mounting groove 4056, and a movable rod 4057. The components work together to adapt to the curved surfaces of blades with different curvatures.

[0048] Specifically, the base 4051 is a Y-shaped, forked, hollow shell made of a high-temperature resistant alloy material, consistent with the material of the conformal head in Embodiment 1. It is not prone to deformation or oxidation in high-temperature heat treatment environments, thus extending the structural stability and service life of the conformal head. The hollow inner cavity of the base 4051 provides installation and movement space for the movable rod 4057. The connecting rod 406 extends into the inner cavity of the base 4051 and is connected to the movable rod 4057. Pulling the connecting rod 406 drives the movable rod 4057 to move along the length of the connecting rod 406 within the base 4051.

[0049] Furthermore, to address the issue of uneven clamping of the blade's curved surface, the base 4051 is bifurcated at one end to form two symmetrical clamping cavities. The inner walls of these cavities are smoothed to accommodate the clamping member 4055. This provides sufficient space for the clamping member 4055's movement while limiting its lateral offset, ensuring uniform force distribution during clamping. Preferably, the clamping member 4055 consists of two sets of movably connected arc-shaped clamping blocks. The arc-shaped structure conforms to the curved contour of the blade's surface. The middle of each set of clamping blocks is hinged to the movable rod 4057. The two sets of clamping blocks are arranged opposite each other to form a symmetrical clamping structure, ensuring uniform force distribution on the blade and reducing excessive localized force that could cause damage or deformation to the blade surface.

[0050] Furthermore, to address the issue of easy adhesion between the tooling and the workpiece, the inner side of the clamping component 4055 is lined with a ceramic patch. The ceramic patch is made of the same material as the ceramic patch of the bottom edge plate clamp and the top edge plate clamp in Embodiment 1, and has the characteristics of high temperature resistance, non-adhesion, and wear resistance, which can reduce the welding adhesion between the clamping component 4055 and the blade body under high temperature environment.

[0051] Furthermore, to address the mismatch between the conformal head 405 and different blade surface curvatures, the hinge shaft mounting groove 4056 is an elongated through groove. The hinge shaft mounting groove 4056 extends through the base 4051 along the length of the connecting rod 406. The length of the hinge shaft mounting groove 4056 matches the sliding stroke of the movable rod 4057, and the width of the hinge shaft mounting groove 4056 matches the outer diameter of the hinge shaft bolt 4054. The hinge shaft mounting groove 4056 is used to install the hinge shaft bolt 4054. The hinge shaft bolt 4054 passes through the end of the movable rod 4057 and slides in connection with the hinge shaft mounting groove 4056. After the movable rod 4057 slides to the target position, tightening the hinge shaft bolt 4054 will fix the movable rod 4057 in place. This structure provides sliding guidance and limitation for the movable rod 4057, reducing offset during the sliding process, and also serves as the rotation fulcrum of the clamping member 4055, providing stable support for the opening and closing movement of the clamping member 4055.

[0052] Furthermore, the groove 4052 is provided through the side of the bifurcation end of the base 4051. The groove 4052 is symmetrically distributed at corresponding positions on the two bifurcation ends and forms an angle of 30° to 60° with the length direction of the connecting rod 406, preferably 45°. This angle setting allows the movement trajectory of the clamping member 4055 to conform to the curvature change of the blade body, facilitating the contact between the clamping member 4055 and the curved surface of the blade body. The groove 4052 is used to guide the movement trajectory of the clamping member 4055. The bolt 4053 is fixedly connected to the clamping member 4055 and extends into the groove 4052. When the movable rod 4057 drives the clamping member 4055 to move, the bolt 4053 slides along the groove 4052. The cooperation between the bolt and the groove realizes the limitation and guidance of the movement direction of the clamping member 4055, reducing the misalignment of the clamping member 4055, and enabling the two sets of clamping members 4055 to open and close synchronously, improving the symmetry and stability of the clamping.

[0053] Furthermore, the movable rod 4057 is made of high-strength, high-temperature resistant alloy, and its length is adapted to the dimensions of the base 4051. The movable rod 4057 passes through the inner cavity of the base 4051. One end of the movable rod 4057 is hinged to the middle of the clamping member 4055, and the other end of the movable rod 4057 is slidably connected to the hinge shaft mounting groove 4056 through the hinge shaft bolt 4054, so that the movable rod 4057 can slide back and forth along the hinge shaft mounting groove 4056, thereby driving the clamping member 4055 to achieve opening and closing movements.

[0054] In use, depending on the blade curvature required for clamping, first loosen bolts 4053 and hinge shaft bolts 4054, allowing the movable rod 4057 to slide freely along the hinge shaft mounting groove 4056 and the clamping member 4055 to open and close freely. Then, by stretching or pushing the connecting rod 406, the movable rods 4057 on both sides, which are connected to the connecting rod 406 and extend out of the inner cavity of the base 4051, move synchronously with the hinge shaft mounting groove 4056. The movable rods 4057 drive the clamping member 4055 to rotate around the hinge point. Rotate, and the bolt 4053, which is fixedly connected to the clamping member 4055, slides along the groove 4052. Under the guidance and limiting action of the groove 4052, the opening and closing adjustment of the two sets of clamping blocks is realized until the ceramic patch on the inner side of the clamping member 4055 is tightly attached to the curved surface of the blade body, forming a multi-point conformal support. After the adjustment is completed, tighten the bolt 4053 and the hinge shaft bolt 4054 to fix the clamping member 4055 and the movable rod 4057 in the current position, and complete the clamping and fixing of the conformal head 405.

[0055] Compared with Embodiment 1, this embodiment improves the structure of the conformal head 405, enabling the conformal head to clamp blades with different curvatures. It eliminates the need for frequent replacement of the conformal head body; only the opening and closing angle of the clamping component 4055 needs to be adjusted to adapt to different blades, thus reducing the cost of tooling and clamping time.

[0056] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any changes or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in the present invention should be included within the scope of protection of the present invention.

Claims

1. A heat treatment fixture for preventing deformation of additive manufacturing blades, characterized in that, It includes a bottom edge plate clamp (200), a top edge plate clamp (300), a blade clamp (400), and a blade clamp mounting rod (500); the bottom edge plate clamp (200) and the top edge plate clamp (300) are used to position and lock the upper and lower ends of the blade, and the blade clamp (400) is mounted on the blade clamp mounting rod (500) to provide multi-point conformal support for the blade body.

2. The additive manufacturing blade anti-deformation heat treatment tooling according to claim 1, characterized in that, It also includes a bottom limiting mechanism (100), a top limiting mechanism (600), and a support rod (700). The upper end of the support rod (700) is connected to the top limiting mechanism (600), the lower end of the support rod (700) is connected to the bottom limiting mechanism (100), the bottom edge plate clamp (200) is connected to the bottom limiting mechanism (100), and the top edge plate clamp (300) is connected to the top limiting mechanism (600). By moving the top limiting mechanism (600) to the position of the support rod (700), the blades of different heights can be clamped and fixed.

3. The additive manufacturing blade anti-deformation heat treatment tooling according to claim 1, characterized in that, The top edge plate clamp (300) has the same structure as the bottom edge plate clamp (200).

4. The additive manufacturing blade anti-deformation heat treatment tooling according to claim 2, characterized in that, The bottom limiting mechanism (100) includes a bottom base plate (101), a bottom positioning hole (103), and a bottom limiting plate (104). The bottom base plate (101) is provided with a bottom positioning hole (103) along the horizontal direction. The bottom limiting plate (104) is fixed in the bottom positioning hole (103) at different positions, so that the spacing between the bottom limiting plates (104) is adjustable, thereby limiting the bottom of blades of different sizes.

5. The additive manufacturing blade anti-deformation heat treatment fixture according to claim 2, characterized in that, The bottom limiting mechanism (100) also includes a bottom vertical plate (102), which is vertically fixed on the bottom limiting mechanism (100) and has reinforcing ribs.

6. The additive manufacturing blade anti-deformation heat treatment tooling according to claim 2, characterized in that, The top limiting mechanism (600) includes a top plate (601), a top limiting plate (603), and a top limiting plate positioning hole (604). The top limiting plate positioning hole (604) is provided on the lower surface of the top plate (601). The top limiting plate (603) is fixed in different top limiting plate positioning holes (604). The spacing between the top limiting plates (603) is adjusted to limit the top of blades of different sizes.

7. The additive manufacturing blade anti-deformation heat treatment tooling according to claim 2, characterized in that, The top limiting mechanism (600) further includes a positioning wall (602), which is vertically disposed on the upper surface of the tooling and is used to limit the longitudinal displacement of the top limiting mechanism (600).

8. The additive manufacturing blade anti-deformation heat treatment tooling according to claim 2, characterized in that, The lower end of the blade clamp mounting rod (500) is connected to the bottom limiting mechanism (100), and the upper end of the blade clamp mounting rod (500) is connected to the top limiting mechanism (600).

9. The additive manufacturing blade anti-deformation heat treatment tooling according to claim 1, characterized in that, The top edge plate clamp (300) is detachably connected to the top limiting mechanism (600) by bolts.

10. The additive manufacturing blade anti-deformation heat treatment fixture according to claim 2, characterized in that, The bottom limiting mechanism (100) is provided with lifting rings (800), which are distributed around the bottom limiting mechanism (100) and are used for the overall lifting operation of the tooling.

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