Machining device and method for tooth-shaped crown of aviation turbine blade

Abstract

The invention provides a machining device and method for an aviation turbine blade tooth-shaped crown. A machining device for an aviation turbine blade tooth-shaped crown comprises a bottom plate, a tooth-shaped positioning block used for being connected with a blade tenon groove in a clamped mode, a side face positioning block used for being connected with the side face of a tenon in an abutting mode, a blade crown positioning block used for being connected with the basin face of a blade crown in an abutting mode, a first pressing component, a second pressing component, a first supporting mechanism and a second supporting mechanism. The tooth-shaped positioning block, the side face positioning block, the blade crown positioning block, the first pressing component, the second pressing component, the first supporting mechanism and the second supporting mechanism are all installed on the bottom plate.

Description

Technical Field

[0001] This invention relates to the field of aero-engine manufacturing technology, and in particular to a processing apparatus and method for aero-turbine blade tooth crowns. Background Technology

[0002] The toothed crown of a turbine rotor blade typically refers to the serrated surface on the back of the blade crown basin used for the mating of each blade. Its main functions include sealing, vibration damping, and maintaining the dynamic stability of the blade. Its shape is complex; the radial direction of the toothed surface on the back of the blade crown basin has a complex dihedral structure, and extremely high precision and surface integrity are required. Traditional machining methods include milling and grinding. In milling, the milling cutter wears extremely rapidly when machining high-hardness materials, resulting in high processing costs and low efficiency. Grinding mainly uses multiple tooth grooves of tenons for clamping and positioning, with the blade crown area using suspension or floating supports. However, for slender, thin-walled blades, cantilever or support will result in poor clamping stability, easily causing deformation and vibration under cutting forces, leading to machining errors and scrap. Therefore, there is an urgent need for a clamping device and method that can achieve precise blade positioning, high rigidity, and stable grinding. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to provide a processing device and method for the toothed crown of aero-turbine blades, which addresses the shortcomings of the prior art.

[0004] The technical solution of the present invention to solve the above-mentioned technical problems is as follows: A processing device for aero-turbine blade toothed crown, comprising: a base plate, a toothed positioning block for engaging the blade tenon groove, a side positioning block for abutting against the side of the tenon, a crown positioning block for abutting against the crown facet, a first pressing component, a second pressing component, a first support mechanism, and a second support mechanism, wherein the toothed positioning block, the side positioning block, the crown positioning block, the first pressing component, the second pressing component, the first support mechanism, and the second support mechanism are all mounted on the base plate.

[0005] The beneficial effects of adopting the technical solution of this invention are as follows: the toothed positioning block is used to engage the blade tenon groove. The side positioning block is used to abut against the side of the tenon. The blade crown positioning block is used to abut against the blade crown basin surface. The datum is unified, and the positioning accuracy is high. Using the blade's own assembly datum tenon as the first positioning datum and the blade basin toothed serrated surface as the second datum, the design datum and process datum are unified, fundamentally reducing cumulative errors and ensuring the relative positional accuracy of each blade toothed surface. This improves the machining accuracy and efficiency of the blade crown. The rigidity is significantly enhanced, and the machining quality is good. The innovative support block technology increases the strength of slender, thin-walled blades, ensuring machining quality. It has strong versatility; this clamping structure is simple to operate and can adapt to different types of blades, exhibiting strong versatility.

[0006] Furthermore, a pad is installed on one side of the base plate, and the toothed positioning block is installed on the pad. The toothed positioning block is a single-tooth inverted V-shaped positioning block, and the toothed positioning block is provided with a positioning surface that matches the tooth profile of the single groove tenon. The side positioning block is installed on one side of the toothed positioning block.

[0007] The beneficial effects of adopting the above-mentioned further technical solution are as follows: the toothed block is a single-tooth inverted "V" shaped surface positioning block, avoiding over-positioning caused by multiple tooth grooves. The positioning surface of the fixture matches the tenon tooth profile of the blade highly. By manufacturing a precise contour positioning block to fit with the tenon profile of the blade, gapless precise positioning and high-strength support are achieved. The end face positioning block is set on the side of the toothed positioning block. The purpose of tenon side positioning is to restrict the movement of the blade in the tenon direction, to support and hold the tenon side, restrict blade movement, and maintain grinding stability. The datum is unified, and the positioning accuracy is high. The assembly datum tenon of the blade itself is used as the first positioning datum, and the blade basin tooth serrated surface is used as the second datum. The design datum and process datum are unified, which fundamentally reduces the cumulative error and ensures the relative positional accuracy of each blade tooth profile. The machining accuracy and efficiency of the blade crown are improved. The rigidity is significantly enhanced, and the machining quality is good. The innovative support block technology increases the strength of slender thin-walled blades and ensures the machining quality. It is highly versatile. The clamping structure is easy to operate and can be adapted to different types of blades, making it highly versatile.

[0008] Furthermore, the first clamping component is mounted on the pad. The first clamping component includes: a first pressure plate, a first adjusting support, a double-ended screw, and a nut. The first pressure plate has a first through groove in its middle and a first groove at one end. The bottom of the first adjusting support is threaded to the pad, and the top of the first adjusting support is installed in the first groove. The bottom of the double-ended screw is connected to the pad. The first pressure plate is sleeved on the top of the double-ended screw through the first through groove. The nut is sleeved on the top of the double-ended screw and abuts against the first pressure plate. The first pressure plate is located above the toothed positioning block. The height of the first pressure plate is lower than the lowest point of the grinding surface.

[0009] The beneficial effects of adopting the above-mentioned further technical solution are as follows: a pad is provided on the base plate, and the pad is fixedly connected to the base plate with screws, which is beneficial for raising the blade. A blade crown positioning block is provided on the other side of the base plate to avoid interference between the blade crown and the base plate and to facilitate processing. A first clamping component is provided on the tenon side of the pad, which consists of a pressure plate, a support pin, a double-ended bolt, and a nut. The double-ended bolt is fixed to the pad. A waist-shaped through groove is opened in the middle of the pressure plate for the double-ended bolt or screw to pass through. A groove is provided at the bottom of the pressure plate to hold the adjusting screw and adjust the position of the clamping point. A uniform clamping force is provided to the tenon by tightening the nut. One end of the adjusting support is fixed to the pad, and the other end abuts against the groove of the pressure plate. The adjusting support is connected to the pad by threads, and the height of the pressure plate can be adjusted up and down to achieve the most suitable clamping state. A uniform clamping force is provided to the tenon by tightening the screw. The first clamping block is positioned above the toothed positioning block, and the height of the clamping block is lower than the lowest point of the grinding surface to reduce grinding interference.

[0010] The first adjusting support can be an adjusting pin.

[0011] Furthermore, the leaf crown positioning block is located on the other side of the base plate; the leaf crown positioning block is provided with a serrated surface adapted to the leaf basin serrated surface.

[0012] The beneficial effects of adopting the above-mentioned further technical solution are as follows: the blade crown positioning block is set at the other end of the base plate to support and hold the blade crown tooth surface, restricting blade movement. The datum is unified, and the positioning accuracy is high. Using the blade's own assembly datum tenon as the first positioning datum and the blade base tooth serration surface as the second datum, the design and process datums are unified, fundamentally reducing cumulative errors and ensuring the relative positional accuracy of each blade tooth surface. This improves the machining accuracy and efficiency of the blade crown. The rigidity is significantly enhanced, and the machining quality is good. The innovative support block technology increases the strength of slender, thin-walled blades, ensuring machining quality. It has strong versatility; the clamping structure is simple to operate and can adapt to different types of blades, exhibiting strong versatility.

[0013] Furthermore, the serrated surface is divided into a first serrated surface, a second serrated surface, and a third serrated surface. The first serrated surface, the second serrated surface, and the third serrated surface are all inclined surfaces. The first serrated surface, the second serrated surface, and the third serrated surface are connected in sequence, and the third serrated surface is disposed away from the blade serrated surface.

[0014] The beneficial effects of adopting the above-mentioned further technical solution are as follows: the dimension of the blade's back serrated surface is obtained from the datum of the blade basin serrated surface; therefore, using the blade basin serrated surface as the positioning surface is more reasonable and consistent with the design datum. The serrated surface of the blade crown positioning block has the same shape as the blade basin serrated surface, with two surfaces abutting against the blade and the other surface away from the positioning surface, avoiding over-positioning instability. Two surfaces can be selected as positioning surfaces according to the blade clamping point position, i.e., the position of the highest point on the blade back, to maintain grinding stability under clamping conditions. The datum is unified, and the positioning accuracy is high. Using the blade's own assembly datum tenon as the first positioning datum and the blade basin toothed serrated surface as the second datum, the design datum and process datum are unified, fundamentally reducing cumulative errors and ensuring the relative positional accuracy of each blade toothed surface. This improves the machining accuracy and efficiency of the blade crown. The rigidity is significantly enhanced, and the machining quality is good. The innovative support block technology increases the strength of slender, thin-walled blades, ensuring machining quality. It has strong versatility; the clamping structure is simple to operate and can adapt to different types of blades, exhibiting strong versatility.

[0015] Further, the first support mechanism includes: a first support, a second support block for abutting against the side of the trailing edge of the leaf crown, and a first fixing screw; the second support mechanism includes: a second support, a first support block for abutting against the side of the leading edge of the leaf crown, and a second fixing screw; the first support and the second support are both mounted on the other side of the base plate; the second support block and the first support block are slidably mounted in the first support and the second support respectively; the first fixing screw and the second fixing screw are respectively threaded onto the first support and the second support; the first fixing screw and the second fixing screw abut against the second support block and the first support block respectively; the first support block is provided with a first inclined groove, and the second support block is provided with a second inclined groove.

[0016] The beneficial effects of adopting the above-mentioned further technical solution are as follows: the support component is set in the first and second supports at the leading and trailing edges of the blade crown on the base plate. The supports have through slots for placing the first and second support blocks, resulting in a symmetrical structure. The support blocks have inclined grooves, preventing them from shifting backward and detaching from the support surface under grinding force. The side of the support block has an angle consistent with the side of the blade crown, which helps reduce grinding interference and achieves complete support. Screws are located on the side of the support block. One end of the first support block is in contact with the leading edge of the blade crown, and the other end is placed in the support slot. The support block has through slots for placing the support block, allowing it to move telescopically within the slot. A gap exists between the support block and the slot, facilitating smooth movement of the support block within the slot and preventing positional deviation. During clamping, the first and second support blocks are tightly inserted into the slots and in contact with the leading and trailing edges of the blade crown. Once the support blocks are moved to the correct position, the side screws are tightened. This provides stable crown support for slender blades, greatly enhancing their grinding rigidity and effectively suppressing deformation and vibration. The inclined groove design prevents the support block from shifting backward and detaching from the support surface under grinding force, effectively suppressing deformation and vibration.

[0017] Furthermore, the second clamping component is mounted on the second support. The second clamping component includes a second pressure plate, a second adjusting support, and a screw. The second pressure plate has a second through groove in its middle and a second recess at one end. The bottom of the second adjusting support is threaded to the second support, and the top of the second adjusting support is installed in the second recess. The bottom of the screw is threaded to the second support, and the second pressure plate is sleeved on the top of the screw through the second through groove. The second support has a guide groove, and the second pressure plate is located in the guide groove.

[0018] The beneficial effect of adopting the above-mentioned further technical solution is that a second support is fixed on the other side of the base plate, and a second pressing component and a second supporting component are provided on the support. The second support is provided with a guide groove to limit the torsion of the second pressing component. The working principle of the second pressing component is the same as that of the first pressing component, providing uniform pressing force to the blade crown by tightening the screw. One end of the adjusting support is fixed to the support, and the other end abuts against the groove of the second pressure plate. The adjusting support is connected to the support by threads, allowing the height of the second pressure plate to be adjusted up and down to achieve the most suitable pressing state. The pressure plate can move within the through groove to reach the optimal pressing point, providing uniform pressing force to the blade crown by tightening the screw.

[0019] Furthermore, the bottom of the base plate is equipped with multiple zero-point positioning pins for precise positioning with the machine tool; the lower surface of the base plate is parallel to the intersection line of multiple serrated surfaces of the blade crown, and the length direction of the side of the base plate is parallel to the intersection line of multiple serrated surfaces.

[0020] The beneficial effects of adopting the above-mentioned further technical solution are as follows: The base plate is used to connect with the machine tool worktable, and multiple zero-point positioning pull pin holes are provided on the bottom, with multiple zero-point positioning pull pins connected in the holes. This allows for rapid and precise positioning of the fixture and the machine tool, and quick fixation of the fixture, reducing debugging time. The lower surface of the base plate is parallel to the intersection line of the multiple serrated surfaces of the blade crown, and the length direction of the side of the base plate is also parallel to the intersection line of the multiple serrated surfaces, ensuring that the placement direction of the fixture is consistent with the radial direction of the multiple spatial tooth profile surfaces of the blade crown, thus determining the machining datum. High efficiency is achieved through zero-point positioning technology, which allows for rapid positioning and clamping of the fixture, reducing auxiliary time and improving machining efficiency.

[0021] Furthermore, the present invention also provides a method for processing the toothed crown of an aero-turbine blade. Based on the aforementioned processing device for the toothed crown of an aero-turbine blade, the processing method for the toothed crown of an aero-turbine blade includes: S1, fixing the blade on the processing device for the toothed crown of an aero-turbine blade, such that the blade tenon groove is engaged in the toothed positioning block, the crown face is attached to the crown positioning block, and the side of the tenon abuts against the end face positioning block; S2, adjusting the first clamping component and the second clamping component so that the first clamping component and the second clamping component provide clamping force to the blade; S3, installing the processing device for the toothed crown of an aero-turbine blade on the worktable of a grinding machine; S4, processing the blade.

[0022] The beneficial effects of adopting the technical solution of this invention are as follows: the toothed positioning block is used to engage the blade tenon groove. The side positioning block is used to abut against the side of the tenon. The blade crown positioning block is used to abut against the blade crown basin surface. The datum is unified, and the positioning accuracy is high. Using the blade's own assembly datum tenon as the first positioning datum and the blade basin toothed serrated surface as the second datum, the design datum and process datum are unified, fundamentally reducing cumulative errors and ensuring the relative positional accuracy of each blade toothed surface. This improves the machining accuracy and efficiency of the blade crown. The rigidity is significantly enhanced, and the machining quality is good. The innovative support block technology increases the strength of slender, thin-walled blades, ensuring machining quality. It has strong versatility; this clamping structure is simple to operate and can adapt to different types of blades, exhibiting strong versatility.

[0023] Further, before step S1, the process includes: grinding wheel preparation and online dressing; in step S3, the zero-point positioning rivet pin at the bottom of the machining device for the toothed crown of the aero-turbine blade is aligned with the reference interface of the grinding machine equipment, and the machining device for the toothed crown of the aero-turbine blade is fixed; after step S4, the process includes inspecting the blade.

[0024] The beneficial effect of adopting the above-mentioned further technical solution is that a forming roller, with a maximum diameter of φ110mm (smaller than the grinding wheel), is used to dress the grinding wheel, ensuring that the grinding wheel profile matches the serrated surface of the blade crown and avoiding interference with the fixture. The core of the grinding wheel dressing device is a roller driven by a high-precision servo axis, whose profile matches the profile of the tooth crown being machined. Through a CNC program, the dressing program can be automatically called after several grinding passes to perform restorative dressing of the grinding wheel, ensuring that the grinding wheel profile remains accurate and sharp. Rough grinding, semi-finish grinding, finish grinding, and polishing processes are used to machine the tooth surface. After the first piece is ground, a special measuring tool or coordinate measuring machine is used to compare it with the 3D digital model. If deviations exist, the compensating tool diameter is adjusted, and finish grinding is performed.

[0025] The advantages of additional aspects of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0026] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present invention and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0027] Figure 1 This is one of the structural schematic diagrams of the processing device for the toothed crown of an aero-turbine blade provided in an embodiment of the present invention.

[0028] Figure 2 This is the second schematic diagram of the structure of the processing device for the toothed crown of an aero-turbine blade provided in an embodiment of the present invention.

[0029] Figure 3 The third schematic diagram of the structure of the processing device for the toothed crown of the aero-turbine blade provided in the embodiment of the present invention.

[0030] Figure 4 The fourth schematic diagram of the structure of the processing device for the toothed crown of the aero-turbine blade provided in the embodiment of the present invention.

[0031] Figure 5 The fifth schematic diagram of the processing device for the toothed crown of aero-turbine blades provided in the embodiments of the present invention.

[0032] Explanation of reference numerals: 1. Base plate; 2. Pad plate; 3. Toothed positioning block; 4. Side positioning block; 5. Blade crown positioning block; 6. First pressure plate; 7. Second pressure plate; 8. First support; 9. Second support; 10. First support block; 11. Second support block; 12. Nut; 13. Double-ended screw; 14. Zero-point positioning rivet pin; 151. First adjusting support; 152. Second adjusting support; 16. Screw; 17. First fixing screw; 18. Second fixing screw; 22. First inclined groove; 33. Second inclined groove; 55. Profile; 64. First serrated surface; 65. Third serrated surface; 66. Second serrated surface; 67. Blade serrated surface; 101. Grinding wheel; 102. Roller. Detailed Implementation

[0033] The principles and features of the present invention are described below with reference to the accompanying drawings. The embodiments described are only for explaining the present invention and are not intended to limit the scope of the present invention.

[0034] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The components of the embodiments of the present invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0035] Therefore, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the invention without inventive effort are within the scope of protection of the invention.

[0036] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0037] In the description of the embodiments of the present invention, it should be noted that if terms such as "upper", "lower", "horizontal", "inner" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship in which the product of the invention is usually placed during use, they are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention.

[0038] In the description of the embodiments of the present invention, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in the present invention according to the specific circumstances.

[0039] like Figures 1 to 5 As shown, this embodiment of the invention provides a processing device for the toothed crown of an aero-turbine blade, comprising: a base plate 1, a toothed positioning block 3 for engaging the blade tenon groove, a side positioning block 4 for abutting against the side of the tenon, a crown positioning block 5 for abutting against the crown facet, a first pressing component, a second pressing component, a first support mechanism, and a second support mechanism, wherein the toothed positioning block 3, the side positioning block 4, the crown positioning block 5, the first pressing component, the second pressing component, the first support mechanism, and the second support mechanism are all mounted on the base plate 1.

[0040] The beneficial effects of adopting the technical solution of this invention are as follows: the toothed positioning block is used to engage the blade tenon groove. The side positioning block is used to abut against the side of the tenon. The blade crown positioning block is used to abut against the blade crown basin surface. The datum is unified, and the positioning accuracy is high. Using the blade's own assembly datum tenon as the first positioning datum and the blade basin toothed serrated surface as the second datum, the design datum and process datum are unified, fundamentally reducing cumulative errors and ensuring the relative positional accuracy of each blade toothed surface. This improves the machining accuracy and efficiency of the blade crown. The rigidity is significantly enhanced, and the machining quality is good. The innovative support block technology increases the strength of slender, thin-walled blades, ensuring machining quality. It has strong versatility; this clamping structure is simple to operate and can adapt to different types of blades, exhibiting strong versatility.

[0041] This invention relates to the field of precision machining technology, specifically to a machining apparatus and method for the toothed crown of an aero-turbine blade, belonging to the field of aero-engine manufacturing.

[0042] The processing apparatus and method for the toothed crown of aero-turbine blades provided in this embodiment of the invention can be a processing apparatus and method for the toothed crown of blades, including a fixture (processing apparatus for the toothed crown of aero-turbine blades), a forming roller and a grinding method.

[0043] The special fixture (a processing device for the toothed crown of aero-turbine blades) includes a base plate, a pad, a toothed positioning block, a side positioning block, a crown serration positioning block, a support component, and a clamping component.

[0044] Base plate: Used for connection to the machine tool worktable. Multiple zero-point positioning rivet holes are provided on the bottom, with multiple zero-point positioning rivet pins connected within these holes. This design allows for rapid and precise positioning of the fixture against the machine tool, and quick fixation of the fixture, reducing setup time.

[0045] The lower surface of the base plate is parallel to the intersection line of the multiple serrated surfaces of the blade crown, and the length direction of the side of the base plate is also parallel to the intersection line of the multiple serrated surfaces. This effect ensures that the placement direction of the fixture is consistent with the radial direction of the multiple spatial tooth profiles of the blade crown, thus determining the machining datum.

[0046] A pad is provided on the base plate, and the pad is fixed to the base plate with screws, which helps to raise the blade. A blade crown positioning block is provided on the other side of the base plate to avoid interference between the blade crown and the base plate and to facilitate processing.

[0047] Toothed positioning block: Fixedly installed on the top of the pad, unlike conventional ones, this toothed block is a single-tooth inverted "V" shaped positioning block to avoid over-positioning caused by multiple tooth grooves. The positioning surface of the fixture matches the tenon tooth profile of the blade perfectly. By manufacturing a precise contour positioning block to fit with the tenon profile of the blade, gapless and accurate positioning and high-strength support are achieved.

[0048] End face positioning block: The side of the toothed positioning block is provided. The purpose of positioning the tenon side is to restrict the movement of the blade in the tenon direction. It is used to support and hold the tenon side, restrict the movement of the blade and maintain grinding stability.

[0049] The blade crown positioning block, located at the other end of the base plate, supports and holds the blade crown toothed surface, restricting blade movement. The dimensions of the blade's back-facing serrated surface are derived from the base-facing serrated surface reference; therefore, using the base-facing serrated surface as the positioning surface is more reasonable and consistent with the design reference. The serrated surface of the blade crown positioning block has the same shape as the base-facing serrated surface, with two surfaces abutting against the blade and the other surface away from the positioning surface to avoid over-positioning instability. Two surfaces can be selected as positioning surfaces based on the blade's clamping point position, i.e., the highest point on the blade back, to maintain grinding stability under clamping conditions.

[0050] The tenon side of the pad is provided with a first clamping component, which consists of a pressure plate (first pressure plate), a support pin (first adjusting support 151), a double-ended bolt (double-ended screw) and a nut. The double-ended bolt is fixed to the pad. The pressure plate has a waist-shaped through groove (first through groove) in the middle position for the double-ended bolt or screw to pass through. The bottom of the pressure plate is provided with a groove (first groove) for abutting the adjusting screw (first adjusting support 151) and can adjust the position of the clamping point. By tightening the nut, a uniform clamping force is provided to the tenon.

[0051] A second support is fixed on the other side of the base plate, and a second clamping component and a second supporting component are provided on the support. The second support is provided with a guide groove to restrict the torsion of the second clamping component. The working principle of the second clamping component is the same as that of the first clamping component, and a uniform clamping force is provided to the blade crown by tightening the screw.

[0052] Support components: These are installed within the first and second supports at the leading and trailing edges of the blade crown on the base plate. Each support (first and second supports) has a through groove for accommodating the first and second support blocks, forming a symmetrical structure. The support blocks have inclined grooves to prevent them from shifting backward and detaching from the support surface under grinding force. The side of the support block has an angle consistent with the side of the blade crown, which helps reduce grinding interference and achieves complete support. Screws (first fixing screw 17 and second fixing screw 18) are located on the side of the support block. One end of the first support block is fitted against the side of the leading edge of the blade crown, while the other end is placed in the support groove (through groove). The through groove in the support block allows it to move telescopically within the groove. The gap between the support block and the groove is 0.03-0.05 mm, ensuring smooth movement of the support block within the groove and preventing positional deviation. During clamping, the first and second support blocks are tightly inserted into the slide grooves to fit against the front and rear edges of the blade crown. Once the support blocks are in the correct position, the side screws (first fixing screw 17 and second fixing screw 18) are tightened. This provides stable crown support for slender blades, greatly enhancing their grinding rigidity and effectively suppressing deformation and vibration.

[0053] Material selection: The main body of the fixture (machining device for the toothed crown of aero-turbine blades), except for the locating block, is made of 45 steel with a heat treatment of HRC35-40. The toothed locating components and end face locating blocks are made of CrWMn with higher wear resistance and a heat treatment of HRC58-62. Screws, pins (first and second adjusting supports), bolts (double-ended screws), and nuts all meet national standards. This improves the service life of the fixture.

[0054] The present invention proposes a processing device for the toothed crown of aero-turbine blades (a processing device for the toothed crown of aero-turbine blades), which includes a forming roller (roller 102), and the specific scheme is as follows: A forming roller (roller 102) is used to perfectly match the shape of the blade crown. Its maximum diameter is typically φ110mm, smaller than that of the grinding wheel 101. This roller is used to dress the grinding wheel 101, ensuring its profile matches the serrated surface of the blade crown and preventing interference with the fixture. The core of the grinding wheel dressing device is a roller 102 driven by a high-precision servo axis. The profile of this roller 102 matches the profile of the toothed crown being machined. Through a CNC program, the dressing program can be automatically invoked after several grinding passes to perform restorative dressing of the grinding wheel 101, ensuring the grinding wheel profile remains accurate and sharp.

[0055] like Figures 1 to 5 As shown, further, a pad 2 is installed on one side of the base plate 1, and the toothed positioning block 3 is installed on the pad 2. The toothed positioning block 3 is a single-tooth inverted V-shaped positioning block, and the toothed positioning block 3 is provided with a positioning surface that matches the tooth profile of the single groove tenon. The side positioning block 4 is installed on one side of the toothed positioning block 3.

[0056] The beneficial effects of adopting the above-mentioned further technical solution are as follows: the toothed block is a single-tooth inverted "V" shaped surface positioning block, avoiding over-positioning caused by multiple tooth grooves. The positioning surface of the fixture matches the tenon tooth profile of the blade highly. By manufacturing a precise contour positioning block to fit with the tenon profile of the blade, gapless precise positioning and high-strength support are achieved. The end face positioning block is set on the side of the toothed positioning block. The purpose of tenon side positioning is to restrict the movement of the blade in the tenon direction, to support and hold the tenon side, restrict blade movement, and maintain grinding stability. The datum is unified, and the positioning accuracy is high. The assembly datum tenon of the blade itself is used as the first positioning datum, and the blade basin tooth serrated surface is used as the second datum. The design datum and process datum are unified, which fundamentally reduces the cumulative error and ensures the relative positional accuracy of each blade tooth profile. The machining accuracy and efficiency of the blade crown are improved. The rigidity is significantly enhanced, and the machining quality is good. The innovative support block technology increases the strength of slender thin-walled blades and ensures the machining quality. It is highly versatile. The clamping structure is easy to operate and can be adapted to different types of blades, making it highly versatile.

[0057] like Figures 1 to 5 As shown, further, the first clamping component is installed on the pad 2. The first clamping component includes: a first pressure plate 6, a first adjusting support 151, a double-ended screw 13, and a nut 12. The first pressure plate 6 has a first through groove in the middle and a first groove at one end. The bottom of the first adjusting support 151 is threaded to the pad 2, and the top of the first adjusting support 151 is installed in the first groove. The bottom of the double-ended screw 13 is connected to the pad 2. The first pressure plate 6 is sleeved on the top of the double-ended screw 13 through the first through groove. The nut 12 is sleeved on the top of the double-ended screw 13 and abuts against the first pressure plate 6. The first pressure plate 6 is located above the toothed positioning block 3. The height of the first pressure plate 6 is lower than the lowest point of the grinding surface.

[0058] The beneficial effects of adopting the above-mentioned further technical solution are as follows: a pad is provided on the base plate, and the pad is fixedly connected to the base plate with screws, which is beneficial for raising the blade. A blade crown positioning block is provided on the other side of the base plate to avoid interference between the blade crown and the base plate and to facilitate processing. A first clamping component is provided on the tenon side of the pad, which consists of a pressure plate, a support pin, a double-ended bolt, and a nut. The double-ended bolt is fixed to the pad. A waist-shaped through groove is opened in the middle of the pressure plate for the double-ended bolt or screw to pass through. A groove is provided at the bottom of the pressure plate to hold the adjusting screw and adjust the position of the clamping point. A uniform clamping force is provided to the tenon by tightening the nut. One end of the adjusting support is fixed to the pad, and the other end abuts against the groove of the pressure plate. The adjusting support is connected to the pad by threads, and the height of the pressure plate can be adjusted up and down to achieve the most suitable clamping state. A uniform clamping force is provided to the tenon by tightening the screw. The first clamping block is positioned above the toothed positioning block, and the height of the clamping block is lower than the lowest point of the grinding surface to reduce grinding interference.

[0059] like Figures 1 to 5 As shown, the leaf crown positioning block 5 is located on the other side of the base plate 1; the leaf crown positioning block 5 is provided with a serrated surface that matches the leaf basin serrated surface.

[0060] The beneficial effects of adopting the above-mentioned further technical solution are as follows: the blade crown positioning block is set at the other end of the base plate to support and hold the blade crown tooth surface, restricting blade movement. The datum is unified, and the positioning accuracy is high. Using the blade's own assembly datum tenon as the first positioning datum and the blade base tooth serration surface as the second datum, the design and process datums are unified, fundamentally reducing cumulative errors and ensuring the relative positional accuracy of each blade tooth surface. This improves the machining accuracy and efficiency of the blade crown. The rigidity is significantly enhanced, and the machining quality is good. The innovative support block technology increases the strength of slender, thin-walled blades, ensuring machining quality. It has strong versatility; the clamping structure is simple to operate and can adapt to different types of blades, exhibiting strong versatility.

[0061] like Figures 1 to 5 As shown, the serrated surface is further divided into a first serrated surface 64, a second serrated surface 66, and a third serrated surface 65. The first serrated surface 64, the second serrated surface 66, and the third serrated surface 65 are all inclined surfaces. The first serrated surface 64, the second serrated surface 66, and the third serrated surface 65 are connected in sequence. The third serrated surface 65 is disposed away from the blade serrated surface 67.

[0062] The beneficial effects of adopting the above-mentioned further technical solution are as follows: the dimension of the blade's back serrated surface is obtained from the datum of the blade basin serrated surface; therefore, using the blade basin serrated surface as the positioning surface is more reasonable and consistent with the design datum. The serrated surface of the blade crown positioning block has the same shape as the blade basin serrated surface, with two surfaces abutting against the blade and the other surface away from the positioning surface, avoiding over-positioning instability. Two surfaces can be selected as positioning surfaces according to the blade clamping point position, i.e., the position of the highest point on the blade back, to maintain grinding stability under clamping conditions. The datum is unified, and the positioning accuracy is high. Using the blade's own assembly datum tenon as the first positioning datum and the blade basin toothed serrated surface as the second datum, the design datum and process datum are unified, fundamentally reducing cumulative errors and ensuring the relative positional accuracy of each blade toothed surface. This improves the machining accuracy and efficiency of the blade crown. The rigidity is significantly enhanced, and the machining quality is good. The innovative support block technology increases the strength of slender, thin-walled blades, ensuring machining quality. It has strong versatility; the clamping structure is simple to operate and can adapt to different types of blades, exhibiting strong versatility.

[0063] like Figures 1 to 5 As shown, the first support mechanism further includes: a first support 8, a second support block 11 for abutting against the side of the trailing edge of the leaf crown, and a first fixing screw 17. The second support mechanism includes: a second support 9, a first support block 10 for abutting against the side of the leading edge of the leaf crown, and a second fixing screw 18. The first support 8 and the second support 9 are both installed on the other side of the base plate 1. The second support block 11 and the first support block 10 are slidably installed in the first support 8 and the second support 9, respectively. The first fixing screw 17 and the second fixing screw 18 are respectively threaded onto the first support 8 and the second support 9. The first fixing screw 17 and the second fixing screw 18 abut against the second support block 11 and the first support block 10, respectively. The first support block 10 is provided with a first inclined groove 22, and the second support block 11 is provided with a second inclined groove 33.

[0064] The beneficial effects of adopting the above-mentioned further technical solution are as follows: the support component is set in the first and second supports at the leading and trailing edges of the blade crown on the base plate. The supports have through slots for placing the first and second support blocks, resulting in a symmetrical structure. The support blocks have inclined grooves, preventing them from shifting backward and detaching from the support surface under grinding force. The side of the support block has an angle consistent with the side of the blade crown, which helps reduce grinding interference and achieves complete support. Screws are located on the side of the support block. One end of the first support block is in contact with the leading edge of the blade crown, and the other end is placed in the support slot. The support block has through slots for placing the support block, allowing it to move telescopically within the slot. A gap exists between the support block and the slot, facilitating smooth movement of the support block within the slot and preventing positional deviation. During clamping, the first and second support blocks are tightly inserted into the slots and in contact with the leading and trailing edges of the blade crown. Once the support blocks are moved to the correct position, the side screws are tightened. This provides stable crown support for slender blades, greatly enhancing their grinding rigidity and effectively suppressing deformation and vibration. The inclined groove design prevents the support block from shifting backward and detaching from the support surface under grinding force, effectively suppressing deformation and vibration.

[0065] The bottom of the second support 9 can be provided with an adjustment groove, which can adjust the relative position of the second support 9 and the base plate according to actual needs.

[0066] like Figures 1 to 5 As shown, further, the second clamping component is installed on the second support 9. The second clamping component includes: a second pressure plate 7, a second adjusting support 152, and a screw 16. The second pressure plate 7 has a second through groove in the middle and a second groove at one end. The bottom of the second adjusting support 152 is threaded to the second support 9, and the top of the second adjusting support 152 is installed in the second groove. The bottom of the screw 16 is threaded to the second support 9. The second pressure plate 7 is sleeved on the top of the screw 16 through the second through groove. The second support 9 has a guide groove, and the second pressure plate 7 is located in the guide groove.

[0067] The beneficial effect of adopting the above-mentioned further technical solution is that a second support is fixed on the other side of the base plate, and a second pressing component and a second supporting component are provided on the support. The second support is provided with a guide groove to limit the torsion of the second pressing component. The working principle of the second pressing component is the same as that of the first pressing component, providing uniform pressing force to the blade crown by tightening the screw. One end of the adjusting support is fixed to the support, and the other end abuts against the groove of the second pressure plate. The adjusting support is connected to the support by threads, allowing the height of the second pressure plate to be adjusted up and down to achieve the most suitable pressing state. The pressure plate can move within the through groove to reach the optimal pressing point, providing uniform pressing force to the blade crown by tightening the screw.

[0068] The second adjusting support can be an adjusting pin. The second support 9 can be a U-shaped structure, and a guide groove can be provided on the top of the second support 9.

[0069] like Figures 1 to 5 As shown, further, the bottom of the base plate 1 is equipped with a plurality of zero-point positioning pins 14 for precise positioning with the machine tool; the lower surface of the base plate 1 is parallel to the intersection line of the plurality of serrated surfaces of the blade crown, and the side length direction of the base plate 1 is parallel to the intersection line of the plurality of serrated surfaces.

[0070] The beneficial effects of adopting the above-mentioned further technical solution are as follows: The base plate is used to connect with the machine tool worktable, and multiple zero-point positioning pull pin holes are provided on the bottom, with multiple zero-point positioning pull pins connected in the holes. This allows for rapid and precise positioning of the fixture and the machine tool, and quick fixation of the fixture, reducing debugging time. The lower surface of the base plate is parallel to the intersection line of the multiple serrated surfaces of the blade crown, and the length direction of the side of the base plate is also parallel to the intersection line of the multiple serrated surfaces, ensuring that the placement direction of the fixture is consistent with the radial direction of the multiple spatial tooth profile surfaces of the blade crown, thus determining the machining datum. High efficiency is achieved through zero-point positioning technology, which allows for rapid positioning and clamping of the fixture, reducing auxiliary time and improving machining efficiency.

[0071] like Figure 1 A schematic diagram of the overall structure of the invention fixture is shown. Figure 2 The invention fixture is shown in the front view grinding schematic diagram. Figure 3 A top view of the invention fixture is shown, illustrating a grinding process. Figure 4 The left view of the invention fixture is shown as a grinding schematic diagram. Figure 5 A schematic diagram of grinding wheel and roller dressing is shown. This invention provides a processing apparatus and method for aero-turbine blade tooth crowns, which can be used for processing blade tooth crowns. The processing apparatus for aero-turbine blade tooth crowns includes: Base plate 1: The lower surface of base plate 1 is fixedly connected with 4 zero-point positioning rivet pins 14, which can quickly realize the precise positioning of the fixture (the processing device for the toothed crown of the aircraft turbine blade) and the machine tool, and quickly fix the fixture, reducing debugging time.

[0072] A pad 2 is provided on the upper surface of the base plate, and a toothed positioning block 3 is fixedly connected to the pad. The positioning surface of the toothed positioning block 3 is consistent with the single groove tooth profile of the blade.

[0073] A first clamping component is provided on the pad 2. The clamping component (first clamping component) consists of a first pressure plate 6, an adjusting support (first adjusting support 151), a double-ended screw 13, and a nut 12. One end of the adjusting support (first adjusting support 151) is fixed to the pad 2, and the other end abuts against the groove of the first pressure plate 6. The adjusting support (first adjusting support 151) is connected to the pad 2 by threads, and the height of the pressure plate 6 can be adjusted up and down to achieve the most suitable clamping state. One end of the double-ended screw 13 is fixed to the middle part of the pad 2. The first pressure plate 6 passes through the double-ended screw 13, and the nut 12 is sleeved on the other end of the double-ended screw 13. Tightening the screw provides a uniform clamping force to the tenon. The first clamping block (first pressure plate 6) is positioned above the toothed positioning block 3, and the height of the clamping block (first pressure plate 6) is lower than the lowest point of the grinding surface to reduce grinding interference.

[0074] End face positioning block (side positioning block 4): Set on the side of toothed positioning block 3, it is used to support and hold the side of the tenon, restrict the movement of the blade and maintain grinding stability.

[0075] The blade crown positioning block 5 is located at the other end of the base plate. The serrated surface of the blade crown positioning block has the same shape as the serrated surface of the blade base. Two of its surfaces (first serrated surface 64 and second serrated surface 66) abut against the blade, while the other surface (third serrated surface 63) is away from the positioning surface to avoid over-positioning instability. The other serrated surface (third serrated surface 63) is away from the blade serrated surface 67 to avoid over-positioning instability. Two of these surfaces can be selected as positioning surfaces based on the position of the blade pressing point, i.e., the position of the highest point on the blade back, to maintain grinding stability under the pressing state.

[0076] Support components (first support mechanism and second support mechanism): These are housed within the first support 8 and the second support 9 at the front and rear edges of the leaf crown on the base plate, forming a symmetrical structure with a first support block 10 and a second support block 11. The first support block 10 and the second support block 11 are respectively provided with a first inclined groove 22 and a second inclined groove 33, with an angle of 2°, i.e., an inclination of 2° from the support end to the end. After tightening the first fixing screw 17 and the second fixing screw 18, the support block will not move backward under the grinding force, thus preventing it from detaching from the support surface and effectively suppressing deformation and vibration.

[0077] The second support 9 is equipped with a second clamping component, which consists of a second pressure plate 7, an adjusting support (second adjusting support 152), and a screw 16. One end of the adjusting support (second adjusting support 152) is fixed to the second support 9, and the other end abuts against the groove of the second pressure plate 7. The adjusting support (second adjusting support 152) is connected to the second support 9 by threads, allowing the height of the second pressure plate 7 to be adjusted up and down to achieve the most suitable clamping state. The screw 16 passes through the central through groove of the second pressure plate 7 and is threadedly connected to the second support 9. The second support 9 has a through groove, allowing the second pressure plate 7 to move within the through groove to reach the optimal clamping point. Tightening the screw provides a uniform clamping force to the blade crown.

[0078] The present invention provides a processing apparatus and method for aero-turbine blade tooth crowns, which can be used as a processing apparatus and method for blade tooth crowns, and has the following positive effects: 1. Unified reference and high positioning accuracy: The first positioning reference is the tenon of the blade itself, and the serrated surface of the blade plate tooth is the second reference. This achieves the unification of design reference and process reference, fundamentally reduces cumulative error, and ensures the relative position accuracy of each blade tooth surface.

[0079] 2. Significantly enhanced stiffness and good processing quality: The innovative support block technology increases the strength of slender, thin-walled blades and ensures processing quality.

[0080] 3. High versatility: The clamping structure is easy to operate and can be adapted to different types of blades, making it highly versatile.

[0081] 4. High efficiency: Utilizing zero-point positioning technology, the fixture can be quickly positioned and clamped, reducing auxiliary time and improving processing efficiency.

[0082] Furthermore, the present invention also provides a method for processing the toothed crown of an aero-turbine blade. Based on the aforementioned processing device for the toothed crown of an aero-turbine blade, the processing method for the toothed crown of an aero-turbine blade includes: S1, fixing the blade on the processing device for the toothed crown of an aero-turbine blade, such that the blade tenon groove is engaged in the toothed positioning block, the crown face is attached to the crown positioning block, and the side of the tenon abuts against the end face positioning block; S2, adjusting the first clamping component and the second clamping component so that the first clamping component and the second clamping component provide clamping force to the blade; S3, installing the processing device for the toothed crown of an aero-turbine blade on the worktable of a grinding machine; S4, processing the blade.

[0083] The beneficial effects of adopting the technical solution of this invention are as follows: the toothed positioning block is used to engage the blade tenon groove. The side positioning block is used to abut against the side of the tenon. The blade crown positioning block is used to abut against the blade crown basin surface. The datum is unified, and the positioning accuracy is high. Using the blade's own assembly datum tenon as the first positioning datum and the blade basin toothed serrated surface as the second datum, the design datum and process datum are unified, fundamentally reducing cumulative errors and ensuring the relative positional accuracy of each blade toothed surface. This improves the machining accuracy and efficiency of the blade crown. The rigidity is significantly enhanced, and the machining quality is good. The innovative support block technology increases the strength of slender, thin-walled blades, ensuring machining quality. It has strong versatility; this clamping structure is simple to operate and can adapt to different types of blades, exhibiting strong versatility.

[0084] The present invention provides a method for machining the toothed crown of an aero-turbine blade, which can be a grinding method for the toothed crown. In addition to using the above-mentioned machining apparatus (machining apparatus for the toothed crown of an aero-turbine blade), it also includes the following steps: S1: Grinding wheel preparation and online dressing.

[0085] S2: Clamping of the workpiece (which can be a blade).

[0086] S3: Multi-process grinding, which controls grinding force and surface quality through rough grinding, fine grinding and finishing grinding.

[0087] S4: Inspection. After the first piece is ground, use a special measuring tool or coordinate measuring machine to compare it with the three-dimensional digital model. If there is a deviation, adjust the compensation tool diameter and perform fine grinding.

[0088] Further, before step S1, the process includes: grinding wheel preparation and online dressing; in step S3, the zero-point positioning rivet pin at the bottom of the machining device for the toothed crown of the aero-turbine blade is aligned with the reference interface of the grinding machine equipment, and the machining device for the toothed crown of the aero-turbine blade is fixed; after step S4, the process includes inspecting the blade.

[0089] The beneficial effect of adopting the above-mentioned further technical solution is that a forming roller, with a maximum diameter of φ110mm (smaller than the grinding wheel), is used to dress the grinding wheel, ensuring that the grinding wheel profile matches the serrated surface of the blade crown and avoiding interference with the fixture. The core of the grinding wheel dressing device is a roller driven by a high-precision servo axis, whose profile matches the profile of the tooth crown being machined. Through a CNC program, the dressing program can be automatically called after several grinding passes to perform restorative dressing of the grinding wheel, ensuring that the grinding wheel profile remains accurate and sharp. Rough grinding, semi-finish grinding, finish grinding, and polishing processes are used to machine the tooth surface. After the first piece is ground, a special measuring tool or coordinate measuring machine is used to compare it with the 3D digital model. If deviations exist, the compensating tool diameter is adjusted, and finish grinding is performed.

[0090] The processing steps are as follows: 1. Fix the blade (workpiece) in the fixture (processing device for the toothed crown of aero-turbine blade), insert the blade tenon groove into the toothed positioning block 3, attach the crown positioning block 5 to the blade crown basin, and abut the side of the tenon against the end face positioning block (side positioning block 4). Adjust the position of the second pressure plate 7, tighten the screw 16, adjust the position of the first pressure plate 6, and provide uniform clamping force to the blade by tightening the nut 12.

[0091] 2. Place the fixture (machining device for the toothed crown of aero-turbine blades) on the worktable of the grinding machine, align the zero-point positioning pin 14 at the bottom of the fixture with the reference interface of the grinding machine, and fix the fixture.

[0092] 3. A three-axis slow-grind drive is used. The shape of the grinding wheel 101 is dressed to match the profile 55 of the blade crown sawtooth surface using roller 102. The tooth profile is machined using rough grinding, semi-fine grinding, fine grinding and polishing processes. Dressing is performed by grinding the grinding wheel 101 with roller 102 until the profile is consistent with the profile of the tooth crown being machined.

[0093] 4. Inspection: After the first piece is ground, use a special measuring tool or coordinate measuring machine to compare it with the 3D digital model. If there is a deviation, adjust the compensation tool diameter and perform fine grinding.

[0094] The grinding wheel 101 is being adjusted, while the roller 102 is fixed on the machine tool worktable. The grinding path of the grinding wheel is being adjusted.

[0095] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A processing apparatus for the toothed crown of an aero-turbine blade, characterized in that, include: The base plate (1), the toothed positioning block (3) for engaging the blade tenon groove, the side positioning block (4) for abutting against the side of the tenon, the blade crown positioning block (5) for abutting against the blade crown basin surface, the first pressing component, the second pressing component, the first support mechanism and the second support mechanism are all mounted on the base plate (1).

2. The machining apparatus for the toothed crown of an aero-turbine blade according to claim 1, characterized in that, A pad (2) is installed on one side of the base plate (1), and a toothed positioning block (3) is installed on the pad (2). The toothed positioning block (3) is a single-tooth inverted V-shaped positioning block. The toothed positioning block (3) is provided with a positioning surface that matches the tooth profile of the single groove tenon. The side positioning block (4) is installed on one side of the toothed positioning block (3).

3. The machining apparatus for the toothed crown of an aero-turbine blade according to claim 2, characterized in that, The first clamping component is installed on the pad (2). The first clamping component includes: a first pressure plate (6), a first adjusting support (151), a double-ended screw (13), and a nut (12). The first pressure plate (6) has a first through groove in the middle and a first groove at one end. The bottom of the first adjusting support (151) is threaded to the pad (2). The top of the first adjusting support (151) is installed in the first groove. The bottom of the double-ended screw (13) is connected to the pad (2). The first pressure plate (6) is sleeved on the top of the double-ended screw (13) through the first through groove. The nut (12) is sleeved on the top of the double-ended screw (13). The nut (12) abuts against the first pressure plate (6). The first pressure plate (6) is located above the toothed positioning block (3). The height of the first pressure plate (6) is lower than the lowest point of the grinding surface.

4. The machining apparatus for the toothed crown of an aero-turbine blade according to claim 1, characterized in that, The leaf crown positioning block (5) is located on the other side of the base plate (1); the leaf crown positioning block (5) is provided with a serrated surface that is adapted to the leaf basin serrated surface.

5. The machining apparatus for the toothed crown of an aero-turbine blade according to claim 4, characterized in that, The serrated surface is divided into a first serrated surface (64), a second serrated surface (66), and a third serrated surface (65). The first serrated surface (64), the second serrated surface (66), and the third serrated surface (65) are all inclined surfaces. The first serrated surface (64), the second serrated surface (66), and the third serrated surface (65) are connected in sequence. The third serrated surface (65) is located away from the blade serrated surface (67).

6. The machining apparatus for the toothed crown of an aero-turbine blade according to claim 1, characterized in that, The first support mechanism includes: a first support (8), a second support block (11) for abutting against the side of the trailing edge of the leaf crown, and a first fixing screw (17). The second support mechanism includes: a second support (9), a first support block (10) for abutting against the side of the leading edge of the leaf crown, and a second fixing screw (18). The first support (8) and the second support (9) are both installed on the other side of the base plate (1). The second support block (11) and the first support block (10) are slidably installed in the first support (8) and the second support (9), respectively. The first fixing screw (17) and the second fixing screw (18) are respectively threaded onto the first support (8) and the second support (9). The first fixing screw (17) and the second fixing screw (18) abut against the second support block (11) and the first support block (10), respectively. The first support block (10) is provided with a first inclined groove (22), and the second support block (11) is provided with a second inclined groove (33).

7. The machining apparatus for the toothed crown of an aero-turbine blade according to claim 6, characterized in that, The second clamping component is installed on the second support (9). The second clamping component includes: a second pressure plate (7), a second adjusting support (152), and a screw (16). The second pressure plate (7) has a second through groove in the middle and a second groove at one end. The bottom of the second adjusting support (152) is threaded to the second support (9) and the top of the second adjusting support (152) is installed in the second groove. The bottom of the screw (16) is threaded to the second support (9). The second pressure plate (7) is sleeved on the top of the screw (16) through the second through groove. The second support (9) has a guide groove and the second pressure plate (7) is located in the guide groove.

8. The machining apparatus for the toothed crown of an aero-turbine blade according to claim 1, characterized in that, The bottom of the base plate (1) is equipped with a plurality of zero-point positioning pull pins (14) for precise positioning with the machine tool; the lower surface of the base plate (1) is parallel to the intersection line of the plurality of sawtooth surfaces of the blade crown, and the side length direction of the base plate (1) is parallel to the intersection line of the plurality of sawtooth surfaces.

9. A method for machining the toothed crown of an aero-turbine blade, characterized in that, Based on the machining apparatus for the toothed crown of an aero-turbine blade according to any one of claims 1 to 8, the machining method for the toothed crown of an aero-turbine blade includes: S1. Fix the blade on the machining device for the toothed crown of the aircraft turbine blade, and make the blade tenon slot engage with the toothed positioning block, with the crown basin facing the crown positioning block and the tenon side abutting against the end face positioning block. S2. Adjust the first clamping component and the second clamping component so that the first clamping component and the second clamping component provide clamping force to the blade; S3. Install the machining device for the toothed crown of the aircraft turbine blade on the worktable of the grinding machine; S4. Process the blades.

10. A method for machining the toothed crown of an aero-turbine blade according to claim 9, characterized in that, Before step S1, the process includes: grinding wheel preparation and online dressing; in step S3, the zero-point positioning rivet pin at the bottom of the machining device for the toothed crown of the aero-turbine blade is aligned with the reference interface of the grinding machine equipment, and the machining device for the toothed crown of the aero-turbine blade is fixed; after step S4, the process includes inspecting the blade.

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