Turbine guide blade weight reduction groove machining device and machining method

Abstract

The invention discloses a turbine guide vane weight reduction groove machining device and method, and belongs to the technical field of machining. The turbine guide vane weight reduction groove machining device comprises an electrode chuck assembly which is used for clamping an electrode body; a plurality of sets of pressing block assemblies are arranged on the clamp base in an annular array mode and used for limiting blades. The limiting rods are arranged on the two sides of the clamp base respectively, the outer circle positioning piece is used for being arranged on the limiting rods on the two sides in a sleeving mode, a positioning round hole is formed in the outer circle positioning piece, the center of the positioning round hole coincides with the center of the clamp base, and the positioning round hole is used for positioning the electrode body so as to assist the electrode body in aligning the center of the clamp base; the jacking assembly is arranged on the clamp base and used for driving the outer circle positioning piece to ascend and descend. By means of the annular array structure, the part clamping number can be maximized in the one-time clamping process, and all parts can be machined at the same time; and through the annular positioning structure of the outer circle positioning piece, the function of quickly aligning the positioning center of the part is achieved.

Description

Technical Field

[0001] The present application relates to the technical field of machining of turbine guide blades of aircraft engines, and in particular, to a device for machining weight-reducing grooves of turbine guide blades. In addition, the present application also relates to a machining method using the device for machining weight-reducing grooves of turbine guide blades. Background Art

[0002] The information provided in this section is for the purpose of generally presenting the background of the present application. To the extent described in this section, the work of the presently named inventors and aspects of the description that may not constitute prior art at the time of filing are neither explicitly nor implicitly admitted to be prior art to the present application.

[0003] The guide vanes of aircraft engine turbines are important parts of the combustion chamber. They are generally made of cast blanks. Most blades have weight-reducing grooves, which generally adopt a conformal structure. Please refer to the attached manual for details. Figure 2 As shown. At present, there are three processing methods for weight reduction grooves: casting, mechanical cutting, and special processing. The casting process frequently causes problems such as fluorescence loosening due to the thin wall thickness of the blade, which makes it impossible to cast. The mechanical cutting process is limited by the cutting tool structure due to the conformal structure of the weight reduction groove, and it is impossible to manufacture a suitable tool. Therefore, in general, the turbine guide blade weight reduction groove is processed by forming electrode electrospark machining.

[0004] The current special processing technology has designed a special forming electrode for processing. However, due to the large number of blades, the thickness of the weight-reducing groove is very large, resulting in repeated clamping of parts and repeated alignment of electrodes. At the same time, the forming electrode is difficult to manufacture and the electrode cannot be repaired, which makes it difficult to reuse the tool electrode. The above factors have caused the weight-reducing groove processing efficiency to be low and the processing cost to be very high, which is not conducive to the large-scale production of turbine guide blades.

[0005] It should be noted that the information disclosed in the above background technology section is only used to enhance the understanding of the background of the present application, and therefore may include information that does not constitute the prior art known to ordinary technicians in the field. Summary of the invention

[0006] The inventor found through research that there are a large number of turbine guide blades in aircraft engines, and the weight reduction groove has a special structure. In order to achieve high-efficiency and low-cost processing of the turbine guide blade weight reduction groove, the "array processing" principle is introduced in the positioning and processing process, which can maximize the number of parts clamped in one clamping process and realize the simultaneous processing of various parts. At the same time, through the annular positioning structure, the function of quickly aligning the positioning center of the part is realized, avoiding multiple clamping and alignment, so as to improve the efficiency of part processing.

[0007] In view of at least one of the above technical problems, the present application provides a turbine guide blade weight reduction groove processing device, which can maximize the number of parts clamped in one clamping process by utilizing an annular array structure to achieve simultaneous processing of various parts; and through the annular positioning structure of the outer circle positioning part, the function of quickly aligning the positioning center of the part is achieved; and a detachable integrally formed electrode is used for processing to achieve low-cost processing.

[0008] At the same time, the present application provides a processing method using the above-mentioned turbine guide blade weight reduction groove processing device.

[0009] According to one aspect of the present application, a turbine guide blade weight reduction groove processing device is provided, which is used to cooperate with a processing machine tool to process the weight reduction groove of the blade. The turbine guide blade weight reduction groove processing device includes an electrode chuck assembly, an electrode body, an outer circle positioning piece, a fixture base, a jacking assembly and a limit rod:

[0010] The electrode chuck assembly is used to clamp the electrode body, and the electrode chuck assembly is also used to cooperate with the spindle of the processing machine tool to drive the electrode body to move, and the electrode body is used to process the weight reduction groove of the blade;

[0011] The fixture base is used to support the blades. A plurality of groups of pressing block assemblies are arranged in a circular array on the fixture base. The pressing block assemblies include an outer edge plate pressing block and an inner edge plate pressing block. The inner edge plate pressing block is used to press the inner edge plate of the limiting blade, and the outer edge plate pressing block is used to press the outer edge plate of the limiting blade.

[0012] The limiting rods are arranged on both sides of the fixture base, and the outer circle positioning pieces are used to be sleeved on the limiting rods on both sides. The outer circle positioning pieces are provided with positioning circular holes, and the center of the positioning circular holes coincides with the center of the fixture base. The positioning circular holes are used to position the electrode body to assist the electrode body in aligning the center of the fixture base.

[0013] The jacking assembly is arranged on the fixture base, the jacking assembly is connected with the outer circle positioning piece, and the jacking assembly is used to drive the outer circle positioning piece to be lifted and lowered.

[0014] In some embodiments of the present application, the lifting assembly includes a connecting rod, a rotating rod, a handle and a push rod. The connecting rod is passed through the bottom of the clamp base, two rotating rods are provided, and the two rotating rods are respectively connected to the two ends of the connecting rod. The handle is set on the side wall of the rotating rod. The first end of the push rod is connected to the rotating rod, and the second end of the push rod is connected to the outer circle positioning piece. The handle is used to drive the rotating rod to rotate around the connecting rod, and then push the push rod to drive the outer circle positioning piece to rise and fall along the limit rod.

[0015] In some embodiments of the present application, a connecting block is provided at the bottom of the outer circular positioning member, the connecting block is connected to the bottom of the outer circular positioning member via connecting bolts, and the connecting block is used to be hinged to the second end of the push rod.

[0016] In some embodiments of the present application, a limiting portion is provided at the bottom of the limiting rod, and the limiting portion is used to support and limit the bottom of the outer cylindrical positioning member. A limiting block is provided at the top of the limiting rod, and the limiting block is connected to the limiting rod by threads. The limiting block is used to limit the vertical rising height of the outer cylindrical positioning member.

[0017] In some embodiments of the present application, polygonal limiting holes are provided on both sides of the outer circular positioning piece, and a polygonal guiding portion is provided in the middle of the limiting rod. The limiting rod is used to pass through the limiting hole and cooperate with the limiting hole through the guiding portion to guide the outer circular positioning piece in the vertical direction.

[0018] In some embodiments of the present application, the electrode chuck assembly includes a chuck connecting rod, a chuck body and an electrode base, the first end of the chuck connecting rod is used to cooperate with the spindle of the processing machine tool, the second end of the chuck connecting rod is used to connect with the chuck body, the chuck body is used to connect with the electrode base, and the electrode base is used to connect with the electrode body.

[0019] In some embodiments of the present application, the electrode chuck assembly also includes a chuck locking piece, a connecting hole is opened at the bottom of the chuck body, the connecting hole is used to cooperate with the top of the electrode base, and a connecting screw hole is opened on the side wall of the connecting hole. The chuck locking piece is used to pass through the connecting screw hole and press the top of the electrode base to lock the electrode base and the chuck body.

[0020] In some embodiments of the present application, a support platform is provided on the electrode base, the support platform is used to support the electrode body, and a plurality of locking screw holes are opened in a circular array on the support platform. The locking screw holes are used to set the electrode locking piece and lock the electrode body and the support platform through the electrode locking piece.

[0021] In some embodiments of the present application, the pressing block assembly further includes a positioning member, and the positioning member is used to cooperate with the outer edge plate pressing block to position the outer edge of the blade.

[0022] According to another aspect of the present application, a method for machining a weight-reducing groove of a turbine guide blade is also provided, using the above-mentioned device for machining a weight-reducing groove of a turbine guide blade, and comprising the following steps:

[0023] S100, placing the blade annular array on the fixture base, pressing the inner edge plate of the limiting blade by the inner edge plate pressing block, and pressing the outer edge plate of the limiting blade by the outer edge plate pressing block;

[0024] S200, after clamping the electrode body through the electrode chuck assembly, connecting the electrode chuck assembly to the spindle of the processing machine tool, so that the axis of the electrode body and the spindle of the processing machine tool coincide;

[0025] S300, positioning the electrode body through the outer circle positioning piece, so that the electrode body is aligned with the center of the fixture base, and then the weight reduction grooves of the blades of the annular array are processed in sequence through the electrode body;

[0026] S400, after the electrode body is consumed, a new electrode body is directly replaced without repeated alignment, and the consumed electrode body is reused after removing the consumed part.

[0027] This application has the following beneficial effects:

[0028] The device for processing the weight-reducing groove of the turbine guide blade of the present application provides a clamping environment for the blade annular array arrangement through the fixture base, and uses the outer edge plate pressure block to press and limit the outer edge plate of the blade, and uses the inner edge plate pressure block to press and limit the inner edge plate of the blade, so as to realize the fixed clamping of the blade, and facilitate the smooth processing of the weight-reducing groove. At the same time, the electrode body is connected to the processing machine tool after being clamped by the electrode clamp assembly, and the weight-reducing groove is processed through the electrode body. A liftable outer circular positioning piece is provided on the fixture base, and the blade can be conveniently clamped after the outer circular positioning piece is lifted by the jacking assembly, and a positioning circular hole is provided on the outer circular positioning piece, and the center of the positioning circular hole coincides with the center of the fixture base, and the positioning circular hole can be used to position the electrode body, thereby assisting the electrode body to align the center of the fixture base, so that the electrode body can smoothly and efficiently process the weight-reducing groove of the blade.

[0029] The turbine guide blade weight reduction groove processing method of the present application also has the above-mentioned beneficial effects. It can maximize the number of blade parts clamped in one clamping process and realize simultaneous processing of various blade parts. At the same time, the annular positioning function is realized through the outer circle positioning piece, which assists the electrode body to quickly align the positioning center of the blade parts of the annular array, avoiding multiple clamping and alignment of the electrode body, so as to improve the efficiency of part processing.

[0030] Of course, any product implementing this application does not necessarily need to achieve all the advantages described above at the same time. In addition to the purposes, features and advantages described above, this application also has other purposes, features and advantages. The following will further describe this application in detail with reference to the figures. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] The drawings constituting a part of the present application are used to provide a further understanding of the present application. The illustrative embodiments and descriptions of the present application are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings:

[0032] Figure 1 It is a schematic diagram of the overall structure of the preferred embodiment of the present application;

[0033] Figure 2 is a schematic diagram of the structure of a blade having a weight-reducing groove;

[0034] Figure 3 is a schematic top view of a preferred embodiment of the present application;

[0035] Figure 4 It is a half-section schematic diagram of a preferred embodiment of the present application;

[0036] Figure 5 It is a schematic diagram of the installation of the electrode body of the preferred embodiment of the present application;

[0037] Figure 6 It is a structural schematic diagram of the chuck body of the preferred embodiment of the present application;

[0038] Figure 7 It is a structural schematic diagram of an outer circle positioning member of a preferred embodiment of the present application;

[0039] Figure 8 It is a structural schematic diagram of a jacking assembly of a preferred embodiment of the present application;

[0040] Fig. 9 It is a schematic diagram of the installation of the positioning member of the preferred embodiment of the present application;

[0041] Legend: 1. Chuck connecting rod; 2. Chuck body; 3. Chuck locking piece; 4. Electrode base; 5. Electrode locking piece; 6. Electrode body; 7. Blade; 8. Outer circle positioning piece; 81. Limiting hole; 9. Clamp base; 10. Outer edge plate pressure block; 11. Inner edge plate pressure block; 12. Limiting rod; 121. Limiting part; 122. Limiting block; 13. Handle; 14. Rotating rod; 15. Connecting rod; 16. Push rod; 17. Connecting block; 18. Positioning piece. DETAILED DESCRIPTION

[0042] The embodiments of the present application are described in detail below in conjunction with the accompanying drawings, but the present application can be implemented in a variety of different ways defined and covered below.

[0043] A turbine guide blade weight reduction groove processing device is used for cooperating with a processing machine tool to process a blade 7 with a weight reduction groove. The turbine guide blade weight reduction groove processing device includes an electrode chuck assembly, an electrode body 6, an outer circle positioning piece 8, a fixture base 9, a jacking assembly and a limit rod 12:

[0044] The electrode chuck assembly is used to clamp the electrode body 6. The electrode chuck assembly is also used to cooperate with the spindle of the processing machine tool to drive the electrode body 6 to move. The electrode body 6 is used to process the weight reduction groove of the blade 7;

[0045] The fixture base 9 is used to support the blade 7. A plurality of groups of pressing block assemblies are arranged in a circular array on the fixture base 9. The pressing block assemblies include an outer edge plate pressing block 10 and an inner edge plate pressing block 11. The inner edge plate pressing block 11 is used to press the inner edge plate of the limiting blade 7, and the outer edge plate pressing block 10 is used to press the outer edge plate of the limiting blade 7.

[0046] The limiting rods 12 are arranged on both sides of the clamp base 9, and the outer circle positioning members 8 are used to be sleeved on the limiting rods 12 on both sides. The outer circle positioning members 8 are provided with positioning circular holes, and the center of the positioning circular holes coincides with the center of the clamp base 9. The positioning circular holes are used to position the electrode body 6 to assist the electrode body 6 in aligning the center of the clamp base 9;

[0047] The jacking assembly is arranged on the fixture base 9, and the jacking assembly is connected to the outer circle positioning member 8, and the jacking assembly is used to drive the outer circle positioning member 8 to move up and down.

[0048] Here, the meaning of "outer edge plate pressing block 10 and inner edge plate pressing block 11" refers to the structure for respectively pressing and limiting the outer edge plate and inner edge plate of the blade 7. In some embodiments, the outer edge plate pressing block 10 is a block structure connected to the clamp base 9 by bolts, and a ball head positioning rod is provided on the outer edge plate pressing block 10, and the outer edge plate of the blade 7 is limited by the ball head positioning rod; the inner edge plate pressing block 11 is a block structure connected to the clamp base 9 by bolts, and a limiting boss is provided on the inner edge plate pressing block 11, and the inner edge plate of the blade 7 is limited by the limiting boss.

[0049] The device for processing the weight-reducing groove of the turbine guide blade of the present application provides a clamping environment for the blade 7 arranged in an annular array through the fixture base 9, and uses the outer edge plate pressing block 10 to press and limit the outer edge plate of the blade 7, and uses the inner edge plate pressing block 11 to press and limit the inner edge plate of the blade 7, so as to realize the fixed clamping of the blade 7, and facilitate the smooth processing of the weight-reducing groove. At the same time, the electrode body 6 is connected to the processing machine tool after being clamped by the electrode clamp assembly, and the weight-reducing groove is processed through the electrode body 6. The fixture base 9 is provided with a liftable outer circular positioning member 8, and the outer circular positioning member 8 can be lifted by the jacking assembly to facilitate the clamping of the blade 7, and the outer circular positioning member 8 is provided with a positioning circular hole, the center of which coincides with the center of the fixture base 9, and the positioning circular hole can be used to position the electrode body 6, thereby assisting the electrode body 6 to align the center of the fixture base 9, so that the electrode body 6 can smoothly and efficiently process the weight-reducing groove of the blade 7.

[0050] Preferably, please refer to Figure 1 , 6As shown in , 7, the lifting assembly includes a connecting rod 15, a rotating rod 14, a handle 13 and a push rod 16. The connecting rod 15 is penetrated at the bottom of the clamp base 9. Two rotating rods 14 are provided. The two rotating rods 14 are respectively connected to the two ends of the connecting rod 15. The handle 13 is set on the side wall of the rotating rod 14. The first end of the push rod 16 is connected to the rotating rod 14, and the second end of the push rod 16 is connected to the outer circle positioning member 8. The handle 13 is used to drive the rotating rod 14 to rotate around the connecting rod 15, and then push the push rod 16 to drive the outer circle positioning member 8 to rise and fall along the limit rod 12.

[0051] It can be understood that the connecting rod 15 is rotatably installed at the bottom of the clamp base 9, and the two ends of the connecting rod 15 are respectively connected to the rotating rod 14, and the rotating rods 14 on both sides can be rotated synchronously through the connecting rod 15, thereby driving the outer circle positioning member 8 to be stably lifted and lowered along the limit rod 12. The handles 13 on both sides can facilitate the workers to drive the rotating rods 14 on both sides to rotate at the same time, and then the outer circle positioning member 8 is pushed to be lifted and lowered through the push rods 16 on both sides, ensuring the force balance during the lifting process of the outer circle positioning member 8, so that the outer circle positioning member 8 can be lifted and lowered more smoothly, so that the blade 7 can be clamped, and the deviation of the outer circle positioning member 8 can be reduced, thereby ensuring the positioning function of the outer circle positioning member 8.

[0052] Preferably, please refer to Figure 7 As shown, a connecting block 17 is provided at the bottom of the outer circle positioning member 8 , and the connecting block 17 is connected to the bottom of the outer circle positioning member 8 via connecting bolts. The connecting block 17 is used to be hinged to the second end of the push rod 16 .

[0053] It can be understood that since the connecting block 17 is connected to the bottom of the outer cylindrical positioning member 8 by connecting bolts, the connecting block 17 and the outer cylindrical positioning member 8 can be easily disassembled, thereby disconnecting the connection between the outer cylindrical positioning member 8 and the jacking assembly, thereby facilitating the maintenance and replacement of the jacking assembly without removing the outer cylindrical positioning member 8 from the limiting rod 12, thereby ensuring the connection stability of the outer cylindrical positioning member 8 and avoiding frequent disassembly that affects the installation accuracy of the outer cylindrical positioning member 8 and the limiting rod 12.

[0054] Preferably, please refer to Figure 7 As shown, a limiting portion 121 is provided at the bottom of the limiting rod 12, and the limiting portion 121 is used to support and limit the bottom of the outer circular positioning member 8. A limiting block 122 is provided at the top of the limiting rod 12, and the limiting block 122 is connected to the limiting rod 12 by threads. The limiting block 122 is used to limit the vertical rising height of the outer circular positioning member 8.

[0055] It is understandable that the limiting portion 121 can stably support the outer circular positioning member 8, thereby realizing the positioning function through the positioning circular hole of the outer circular positioning member 8, and also preventing the outer circular positioning member 8 from interfering with the clamped blade 7. The limiting block 122 can be easily disassembled from the limiting rod 12, and the upper part of the outer circular positioning member 8 sleeved on the limiting rod 12 is limited by the limiting block 122, so as to prevent the outer circular positioning member 8 from being separated from the limiting rod 12 during transportation.

[0056] Preferably, please refer to Figure 7 As shown, polygonal limiting holes 81 are provided on both sides of the outer circular positioning member 8, and a polygonal guiding portion is provided in the middle of the limiting rod 12. The limiting rod 12 is used to pass through the limiting hole 81 and guide the outer circular positioning member 8 in the vertical direction through the cooperation of the guiding portion and the limiting hole 81.

[0057] It can be understood that in order to reduce the displacement of the outer cylindrical positioning part 8 during the lifting process, the polygonal guide part cooperates with the limiting hole 81 to stably guide the outer cylindrical positioning part 8, and cooperates with the limiting rods 12 on both sides to synchronously limit and guide the outer cylindrical positioning part 8, thereby ensuring the consistency of the position of the outer cylindrical positioning part 8 and ensuring that the outer cylindrical positioning part 8 can achieve a stable positioning function.

[0058] Preferably, please refer to Figure 1 , 5 As shown in , 6, the electrode chuck assembly includes a chuck connecting rod 1, a chuck body 2 and an electrode base 4, the first end of the chuck connecting rod 1 is used to cooperate with the spindle of the processing machine tool, the second end of the chuck connecting rod 1 is used to connect with the chuck body 2, the chuck body 2 is used to connect with the electrode base 4, and the electrode base 4 is used to connect with the electrode body 6.

[0059] It is understandable that the connection between the electrode base 4 and the chuck connecting rod 1 is realized through the chuck body 2, and the spindle of the processing machine tool can drive the electrode base 4 and the electrode body 6 to move through the chuck connecting rod 1 to realize the processing of the weight reduction groove of the blade 7. The electrode body 6 can be conveniently disassembled and assembled as a whole by disconnecting the connection between the electrode base 4 and the chuck body 2, and it is convenient to install different electrode bodies 6 by replacing the electrode base 4. At the same time, the electrode body 6 can also be directly disassembled and assembled from the electrode base 4, which is convenient for replacing the electrode body 6. After replacing the electrode body 6, there is no need to repeat the alignment, which is conducive to improving the overall processing efficiency.

[0060] Preferably, please refer to Figure 6 As shown, the electrode chuck assembly also includes a chuck locking piece 3, a connecting hole is opened at the bottom of the chuck body 2, the connecting hole is used to cooperate with the top of the electrode base 4, and a connecting screw hole is opened on the side wall of the connecting hole. The chuck locking piece 3 is used to pass through the connecting screw hole and press the top of the electrode base 4 to lock the electrode base 4 and the chuck body 2.

[0061] It can be understood that the electrode base 4 can be stably connected through the clamp locking member 3, and the clamp locking member 3 can be conveniently disassembled by the copper tube to remove the electrode base 4, which is very convenient to operate.

[0062] It should be noted that the clamp locking member 3 adopts a clamp locking bolt, and the electrode base 4 can be conveniently disassembled and assembled by twisting the clamp locking bolt.

[0063] Preferably, please refer to Figure 5 As shown, a support platform is provided on the electrode base 4, and the support platform is used to support the electrode body 6. A plurality of locking screw holes are provided in a circular array on the support platform, and the locking screw holes are used to set the electrode locking piece 5 and lock the electrode body 6 and the support platform through the electrode locking piece 5.

[0064] It can be understood that the electrode body 6 can be stably mounted on the electrode base 4 through the support platform and the electrode locking piece 5 , and the electrode body 6 can be quickly assembled and disassembled through the electrode locking piece 5 .

[0065] It should be noted that the electrode locking member 5 adopts an electrode locking bolt. After the electrode locking bolt passes through the preset positioning screw hole on the electrode body 6 and cooperates with the locking screw hole on the supporting platform, the electrode body 6 can be installed.

[0066] Preferably, please refer to Figure 8 As shown, the pressing block assembly further includes a positioning member 18 , and the positioning member 18 is used to cooperate with the outer edge plate pressing block 10 to position the outer edge of the blade 7 .

[0067] It can be understood that the positioning member 18 can assist in positioning the blade 7, thereby facilitating rapid positioning and clamping of the blade 7.

[0068] It should be noted that the positioning member 18 is a plate-like structure, and the positioning member 18 is connected to the fixture base 9 by bolts, which can facilitate the disassembly and assembly of the positioning member 18.

[0069] According to another aspect of the present application, a method for machining a weight-reducing groove of a turbine guide blade is also provided, using the above-mentioned device for machining a weight-reducing groove of a turbine guide blade, and comprising the following steps:

[0070] S100, placing the annular array of blades 7 on the fixture base 9, pressing the inner edge plates of the limiting blades 7 by the inner edge plate pressing block 11, and pressing the outer edge plates of the limiting blades 7 by the outer edge plate pressing block 10;

[0071] S200, after clamping the electrode body 6 through the electrode chuck assembly, the electrode chuck assembly is connected to the spindle of the processing machine tool, so that the axis of the electrode body 6 and the spindle of the processing machine tool coincide with each other;

[0072] S300, positioning the electrode body 6 through the outer circle positioning piece 8, so that the electrode body 6 is aligned with the center of the fixture base 9, and then the weight reduction grooves of the blades 7 of the annular array are processed in sequence through the electrode body 6;

[0073] S400, after the electrode body 6 is consumed, a new electrode body 6 is directly replaced without repeated alignment, and the consumed electrode body 6 is reused after removing the consumed part.

[0074] The turbine guide blade weight reduction groove processing method of the present application also has the above-mentioned beneficial effects. It can maximize the number of blade parts clamped in one clamping process and realize simultaneous processing of various blade parts. At the same time, the annular positioning function is realized by the outer circle positioning member 8, which assists the electrode body 6 to quickly align the positioning center of the blade parts of the annular array, avoiding multiple clamping and alignment of the electrode body 6, so as to improve the efficiency of parts processing.

[0075] It should be noted that, in this article, the terms "comprises", "includes" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or apparatus that includes a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or apparatus.

[0076] This article uses specific examples to illustrate the principles and implementation methods of this application. The above examples are only used to help understand the method and its core ideas of this application. The above is only the preferred implementation method of this application. It should be pointed out that due to the limitations of textual expression and the objective existence of infinite specific structures, ordinary technicians in this technical field can make several improvements, modifications or changes without departing from the principles of this application, and can also combine the above technical features in an appropriate manner; these improvements, modifications, changes or combinations, or the direct application of the inventive concept and technical solution to other occasions without improvement, should be regarded as the protection of this application.

Claims

1. A turbine guide blade weight reduction groove processing device, used for cooperating with a processing machine tool to process a blade (7) weight reduction groove, characterized in that: The turbine guide blade weight reduction groove processing device comprises an electrode chuck assembly, an electrode body (6), an outer circle positioning piece (8), a fixture base (9), a lifting assembly and a limiting rod (12): The electrode chuck assembly is used to clamp the electrode body (6), and the electrode chuck assembly is also used to cooperate with the main shaft of the processing machine tool to drive the electrode body (6) to move, and the electrode body (6) is used to process the weight reduction groove of the blade (7); The fixture base (9) is used to support the blade (7). A plurality of groups of pressing block assemblies are arranged in a circular array on the fixture base (9). The pressing block assemblies include an outer edge plate pressing block (10) and an inner edge plate pressing block (11). The inner edge plate pressing block (11) is used to press the inner edge plate of the limiting blade (7), and the outer edge plate pressing block (10) is used to press the outer edge plate of the limiting blade (7). The limiting rods (12) are arranged on both sides of the clamp base (9); the outer circle positioning pieces (8) are used to be sleeved on the limiting rods (12) on both sides; the outer circle positioning pieces (8) are provided with positioning circular holes; the center of the positioning circular holes coincides with the center of the clamp base (9); the positioning circular holes are used to position the electrode body (6) to assist the electrode body (6) in aligning the center of the clamp base (9); The jacking assembly is arranged on the fixture base (9), and the jacking assembly is connected to the outer circle positioning member (8). The jacking assembly is used to drive the outer circle positioning member (8) to move up and down.

2. The turbine guide blade weight reduction groove processing device according to claim 1, characterized in that: The lifting assembly comprises a connecting rod (15), a rotating rod (14), a handle (13) and a push rod (16). The connecting rod (15) is passed through the bottom of the clamp base (9). Two rotating rods (14) are provided. The two rotating rods (14) are respectively connected to the two ends of the connecting rod (15). The handle (13) is arranged on the side wall of the rotating rod (14). The first end of the push rod (16) is connected to the rotating rod (14), and the second end of the push rod (16) is connected to the outer circle positioning member (8). The handle (13) is used to drive the rotating rod (14) to rotate around the connecting rod (15), thereby pushing the push rod (16) to drive the outer circle positioning member (8) to rise and fall along the limit rod (12).

3. The turbine guide blade weight reduction groove processing device according to claim 2, characterized in that: A connecting block (17) is provided at the bottom of the outer circle positioning member (8). The connecting block (17) is connected to the bottom of the outer circle positioning member (8) via connecting bolts. The connecting block (17) is used to be hinged to the second end of the push rod (16).

4. The turbine guide blade weight reduction groove processing device according to claim 1 or 2, characterized in that: A limiting portion (121) is provided at the bottom of the limiting rod (12), and the limiting portion (121) is used to support and limit the bottom of the outer circular positioning member (8). A limiting block (122) is provided at the top of the limiting rod (12), and the limiting block (122) is connected to the limiting rod (12) by a thread, and the limiting block (122) is used to limit the vertical rising height of the outer circular positioning member (8).

5. The turbine guide blade weight reduction groove processing device according to claim 1 or 2, characterized in that: A polygonal limiting hole (81) is provided on both sides of the outer circular positioning member (8), a polygonal guiding portion is provided in the middle of the limiting rod (12), and the limiting rod (12) is used to pass through the limiting hole (81) and cooperate with the limiting hole (81) through the guiding portion to guide the outer circular positioning member (8) in the vertical direction.

6. The turbine guide blade weight reduction groove processing device according to claim 1, characterized in that: The electrode chuck assembly comprises a chuck connecting rod (1), a chuck body (2) and an electrode base (4); the first end of the chuck connecting rod (1) is used to cooperate with the main shaft of a processing machine tool; the second end of the chuck connecting rod (1) is used to connect with the chuck body (2); the chuck body (2) is used to connect with the electrode base (4); and the electrode base (4) is used to connect with the electrode body (6).

7. The turbine guide blade weight reduction groove processing device according to claim 6, characterized in that: The electrode chuck assembly also includes a chuck locking piece (3). A connection hole is provided at the bottom of the chuck body (2), and the connection hole is used to cooperate with the top of the electrode base (4). A connection screw hole is provided on the side wall of the connection hole. The chuck locking piece (3) is used to pass through the connection screw hole and press the top of the electrode base (4) to lock the electrode base (4) and the chuck body (2) together.

8. The turbine guide blade weight reduction groove processing device according to claim 6, characterized in that: A support platform is provided on the electrode base (4), and the support platform is used to support the electrode body (6). A plurality of locking screw holes are provided in an annular array on the support platform, and the locking screw holes are used to set the electrode locking piece (5) and lock the electrode body (6) and the support platform together through the electrode locking piece (5).

9. The turbine guide blade weight reduction groove processing device according to claim 1, characterized in that: The pressing block assembly also includes a positioning member (18), and the positioning member (18) is used to cooperate with the outer edge plate pressing block (10) to position the outer edge of the blade (7).

10. A method for processing a weight-reducing groove of a turbine guide blade, characterized in that: The turbine guide blade weight reduction groove processing device according to any one of claims 1 to 9 is used, which comprises the following steps: S100, placing the annular array of blades (7) on the fixture base (9), pressing the inner edge plates of the limiting blades (7) with the inner edge plate pressing block (11), and pressing the outer edge plates of the limiting blades (7) with the outer edge plate pressing block (10); S200, after clamping the electrode body (6) through the electrode chuck assembly, connecting the electrode chuck assembly to the spindle of the processing machine tool, so that the axis of the electrode body (6) coincides with the axis of the spindle of the processing machine tool; S300, positioning the electrode body (6) through the outer circle positioning piece (8) so that the electrode body (6) is aligned with the center of the fixture base (9), and then the weight-reducing grooves of the blades (7) of the annular array are processed in sequence through the electrode body (6); S400, after the electrode main body (6) is consumed, a new electrode main body (6) is directly replaced without repeated alignment, and the consumed electrode main body (6) is reused after removing the consumed part.

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