Turbine guide vane lightening groove machining device and machining method

Abstract

The application discloses a turbine guide vane weight-reducing groove machining device and a machining method, and belongs to the machining field.The device comprises an electrode chuck assembly, which is used for clamping an electrode main body; a plurality of groups of pressing block assemblies are arranged in an annular array on a clamp base, and the pressing block assemblies are used for limiting a vane; limiting rods are arranged on two sides of the clamp base; an outer circle positioning piece is used for being sleeved on the limiting rods on the two sides; a positioning circular hole is formed in the outer circle positioning piece, the center of the positioning circular hole is coincident with the center of the clamp base, and the positioning circular hole is used for positioning the electrode main body to assist in aligning the center of the clamp base; and a jacking assembly is arranged on the clamp base and is used for driving the outer circle positioning piece to ascend and descend. The annular array structure is used to maximize the number of clamped parts in one clamping process, so that the parts can be simultaneously machined; and the annular positioning structure of the outer circle positioning piece is used to realize the function of quickly aligning the positioning center of the parts.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of turbine guide vane machining of an aero-engine, in particular, to a turbine guide vane weight-reducing groove machining device. In addition, the present application also relates to a machining method using the above turbine guide vane weight-reducing groove machining device. BACKGROUND

[0002] The information provided in this section is for the purpose of generally presenting the context of the application. The work of the presently named inventors, to the extent the descriptions are described in this section, as well as the descriptions of aspects that can not otherwise constitute prior art at the time of filing, are neither expressly nor impliedly admitted to be prior art against the application.

[0003] The turbine guide vane of an aero-engine is an important component of a combustion chamber, generally adopts a cast blank, most of the vanes have weight-reducing grooves, and the weight-reducing grooves generally adopt a conformal structure, please refer to the drawings in the specification Figure 2 At present, the process method of the weight-reducing groove has three forms of casting forming, mechanical cutting machining and special machining. The casting process frequently causes problems such as fluorescent porosity due to the thin wall thickness of the vane, so that the vane cannot be cast into a shape. The mechanical cutting machining process is limited in structure of the cutting tool due to the conformal structure of the weight-reducing groove, so that a suitable tool cannot be manufactured. Therefore, generally, the turbine guide vane weight-reducing groove adopts a forming electrode electric spark machining.

[0004] The current special process machining process designs a special forming electrode for machining. However, due to the large number of vanes and the large thickness of the weight-reducing groove part to be removed, the parts are repeatedly clamped and the electrode is repeatedly aligned, and the forming electrode is difficult to manufacture and cannot be repaired, so that the tool electrode is also difficult to reuse. The above factors cause the phenomenon of low machining efficiency and high machining cost of the weight-reducing groove, which is not conducive to large-scale production of the turbine guide vane.

[0005] It should be noted that the information disclosed in the above background section is only used to strengthen the understanding of the background of the present application, and therefore can include information that does not constitute prior art known to those skilled in the art. SUMMARY

[0006] The inventors found through research that the number of turbine guide vanes of an aero-engine is large, the structure of the weight-reducing groove is special, in order to realize high-efficiency and low-cost machining of the turbine guide vane weight-reducing groove, the "array machining" principle is introduced in the process of positioning and machining, which can maximize the number of parts clamped in one clamping process and realize simultaneous machining of each part. At the same time, through the ring positioning structure, the function of quickly aligning the positioning center of the part is realized, and multiple clamping and alignment are avoided to improve the machining efficiency of the part.

[0007] In view of at least one of the above technical problems, the present application provides a turbine guide vane weight-reducing groove machining device, which can maximize the number of parts clamped in one clamping process by utilizing an annular array structure to realize simultaneous machining of various parts, and can realize the function of quickly locating the center of the parts by utilizing the annular positioning structure of the outer circle positioning piece, and can realize low-cost machining by utilizing the detachable integrally formed electrode for machining.

[0008] Meanwhile, the present application provides a machining method using the above turbine guide vane weight-reducing groove machining device.

[0009] According to one aspect of the present application, a turbine guide vane weight-reducing groove machining device is provided for machining the weight-reducing groove of a vane in cooperation with a machining machine tool, and the turbine guide vane weight-reducing groove machining device comprises an electrode chuck assembly, an electrode main body, an outer circle positioning piece, a clamp base, a jacking assembly and a limiting rod.

[0010] The electrode chuck assembly is used for clamping the electrode main body, and the electrode chuck assembly is also used for cooperating with the main shaft of the machining machine tool to drive the electrode main body to move, and the electrode main body is used for machining the weight-reducing groove of the vane;

[0011] The clamp base is used for supporting the vane, and a plurality of groups of pressing block assemblies are arranged in an annular array on the clamp base, and the pressing block assembly comprises an outer edge plate pressing block and an inner edge plate pressing block, the inner edge plate pressing block is used for pressing and limiting the inner edge plate of the vane, and the outer edge plate pressing block is used for pressing and limiting the outer edge plate of the vane;

[0012] The limiting rods are arranged on both sides of the clamp base, the outer circle positioning piece is used for being sleeved on the limiting rods on both sides, the outer circle positioning piece is provided with a positioning circular hole, the center of the positioning circular hole coincides with the center of the clamp base, and the positioning circular hole is used for positioning the electrode main body to assist the electrode main body to align the center of the clamp base;

[0013] The jacking assembly is arranged on the clamp base, the jacking assembly is connected with the outer circle positioning piece, and the jacking assembly is used for driving the outer circle positioning piece to ascend and descend.

[0014] In some embodiments of the present application, the jacking assembly comprises a connecting rod, two rotating rods, a handle and a push rod, the connecting rod is arranged through the bottom of the clamp base, the two rotating rods are arranged respectively at the two ends of the connecting rod, the handle is arranged on the side wall of the rotating rod, the first end of the push rod is connected with the rotating rod, and the second end of the push rod is connected with the outer circle positioning piece, the handle is used for driving the rotating rod to rotate around the connecting rod, and then the push rod is driven to drive the outer circle positioning piece to ascend and descend along the limiting rod.

[0015] In some embodiments of the present application, the bottom of the outer circle positioning piece is provided with a connecting block, the connecting block is connected with the bottom of the outer circle positioning piece through a connecting bolt, and the connecting block is used for being hinged with 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, which is used to support and limit the bottom of the outer circular positioning member. A limiting block is provided at the top of the limiting rod, which is connected to the limiting rod by a thread, and is used to limit the vertical rising height of the outer circular 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 guide 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 guide 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, which is used to support the electrode body. A plurality of locking screw holes are provided in a circular array on the support platform, which are used to set the electrode locking piece and lock the electrode body to 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, which 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 in a turbine guide blade is provided, which uses the above-mentioned device for machining a weight-reducing groove in a turbine guide blade and comprises the following steps:

[0023] S100, placing the blade annular array on the fixture base, pressing the inner edge plates of the limiting blades with the inner edge plate pressing blocks, and pressing the outer edge plates of the limiting blades with the outer edge plate pressing blocks;

[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, the electrode body is positioned by the outer circle positioning piece, the center of the electrode body is aligned with the jig base, and then the weight reduction groove of the annular array of blades is processed in sequence;

[0026] S400, after the electrode body is consumed, the new electrode body is directly replaced, and there is no need to repeat the alignment. After the consumed electrode body is removed, it can be reused.

[0027] The application has the following beneficial effects:

[0028] The turbine guide vane weight reduction groove machining device provides a clamping environment for the annular array of blades through the jig base, and uses the outer edge plate pressing block to press and position the outer edge plate of the blade, and uses the inner edge plate pressing block to press and position the inner edge plate of the blade, so as to realize the clamping of the blade. After the electrode holder assembly is clamped, it is connected with the machining machine tool, and the weight reduction groove is machined by the electrode body. The outer circle positioning piece provided on the jig base can be lifted by the lifting assembly to facilitate the clamping of the blade. The positioning circular hole is provided on the outer circle positioning piece, the center of the positioning circular hole coincides with the center of the jig base, and the electrode body can be positioned through the positioning circular hole, so as to assist the electrode body to align the center of the jig base, so that the electrode body can smoothly and efficiently process the weight reduction groove of the blade.

[0029] The turbine guide vane weight reduction groove machining method also has the above beneficial effects. The number of clamped blade parts can be maximized in one clamping process, and each blade part can be machined at the same time. At the same time, the outer circle positioning piece realizes the annular positioning function, assists the electrode body to quickly align the positioning center of the annular array of blade parts, avoids multiple clamping and alignment of the electrode body, and improves the part machining efficiency.

[0030] Of course, implementing any product of the present application does not necessarily require all the advantages described above. In addition to the purposes, features and advantages described above, the present application has other purposes, features and advantages. The present application will be further described below with reference to the drawings. BRIEF DESCRIPTION OF DRAWINGS

[0031] The drawings that form a part of this application are used to provide a further understanding of the application, the schematic embodiments of the application and the description thereof are used to explain the application, and do not constitute an improper limitation on the application. In the drawings:

[0032] Figure 1 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 the blade with weight reduction groove;

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

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

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

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

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

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

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

[0041] Legend: 1, chuck connecting rod; 2, chuck body; 3, chuck locking member; 4, electrode base; 5, electrode locking member; 6, electrode body; 7, vane; 8, outer circle positioning member; 81, limiting hole; 9, clamp base; 10, outer rim plate pressing block; 11, inner rim plate pressing block; 12, limiting rod; 121, limiting portion; 122, limiting block; 13, handle; 14, rotating rod; 15, connecting rod; 16, push rod; 17, connecting block; 18, positioning member. DETAILED DESCRIPTION

[0042] The embodiments of the present application are described in detail below with reference to the accompanying drawings, but the present application can be implemented in various different ways as defined and covered by the following.

[0043] A turbine guide vane weight-reducing groove machining device for machining the weight-reducing groove of the vane 7 in cooperation with a machining machine tool, the turbine guide vane weight-reducing groove machining device comprising an electrode chuck assembly, an electrode body 6, an outer circle positioning member 8, a clamp base 9, a jacking assembly, and a limiting rod 12:

[0044] 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 machining machine tool to drive the electrode body 6 to move, and the electrode body 6 is used to machine the weight-reducing groove of the vane 7;

[0045] The clamp base 9 is used to support the blade 7, and a plurality of sets of pressing block assemblies are arranged in an annular array on the clamp base 9, and the pressing block assemblies include outer edge plate pressing blocks 10 and inner edge plate pressing blocks 11, the inner edge plate pressing blocks 11 are used to press and position the inner edge plate of the blade 7, and the outer edge plate pressing blocks 10 are used to press and position the outer edge plate of the blade 7;

[0046] The limiting rods 12 are arranged on both sides of the clamp base 9, the outer circle positioning member 8 is used to be sleeved on the limiting rods 12 on both sides, a positioning circular hole is formed in the outer circle positioning member 8, the center of the positioning circular hole coincides with the center of the clamp base 9, and the positioning circular hole is 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 clamp base 9, the jacking assembly is connected with the outer circle positioning member 8, and the jacking assembly is used to drive the outer circle positioning member 8 to ascend and descend.

[0048] Here, the “outer edge plate pressing blocks 10 and inner edge plate pressing blocks 11” refer to structures for pressing and positioning the outer edge plate and the inner edge plate of the blade 7, in some embodiments, the outer edge plate pressing blocks 10 are block structures connected to the clamp base 9 through bolts, a ball head positioning rod is arranged on the outer edge plate pressing blocks 10, and the outer edge plate of the blade 7 is positioned through the ball head positioning rod; the inner edge plate pressing blocks 11 are block structures connected to the clamp base 9 through bolts, a limiting boss is arranged on the inner edge plate pressing blocks 11, and the inner edge plate of the blade 7 is positioned through the limiting boss.

[0049] The turbine guide vane weight-reducing groove machining device provides a clamping environment for the annular array arrangement of the blade 7 through the clamp base 9, presses and positions the outer edge plate of the blade 7 through the outer edge plate pressing blocks 10, and presses and positions the inner edge plate of the blade 7 through the inner edge plate pressing blocks 11, so that the blade 7 is fixed and clamped, and the machining of the weight-reducing groove is facilitated. After the electrode body 6 is clamped through the electrode chuck assembly and connected with a machining machine tool, the machining of the weight-reducing groove is performed through the electrode body 6. The outer circle positioning member 8 arranged on the clamp base 9 is liftable, the outer circle positioning member 8 is lifted through the jacking assembly, the clamping of the blade 7 is facilitated, a positioning circular hole is formed in the outer circle positioning member 8, the center of the positioning circular hole coincides with the center of the clamp base 9, the electrode body 6 is positioned through the positioning circular hole, and the center of the clamp base 9 is aligned through the electrode body 6, so that the machining of the weight-reducing groove of the blade 7 is smoothly and efficiently performed through the electrode body 6.

[0050] Preferably, please refer to Figure 1 , 6As shown in Figure 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 passed through the bottom of the clamp base 9. There are two rotating rods 14, which 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 is understandable that the connecting rod 15 is rotatably provided 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. The rotating rods 14 on both sides can be rotated synchronously by the connecting rod 15, thereby driving the outer circle positioning member 8 to be stably raised and lowered along the limit rod 12. The handles 13 on both sides can facilitate workers to simultaneously drive the rotating rods 14 on both sides to rotate, and then the outer circle positioning member 8 is pushed up and down by the push rods 16 on both sides, ensuring the force balance during the lifting process of the outer circle positioning member 8, making the outer circle positioning member 8 more smoothly lifted and lowered, so that the blade 7 can be clamped, and reducing the deviation of the outer circle positioning member 8, 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 circular positioning member 8 by connecting bolts, the connecting block 17 and the outer circular positioning member 8 can be easily disassembled, thereby disconnecting the connection between the outer circular positioning member 8 and the jacking assembly, making it convenient for the maintenance and replacement of the jacking assembly without removing the outer circular positioning member 8 from the limiting rod 12, thereby ensuring the connection stability of the outer circular positioning member 8 and avoiding frequent disassembly that affects the installation accuracy of the outer circular 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 a thread. The limiting block 122 is used to limit the vertical rising height of the outer circular positioning member 8.

[0055] It can be understood that the limiting part 121 can stably support the outer circle positioning piece 8, so as to realize the positioning function through the positioning circular hole of the outer circle positioning piece 8, and also avoid the interference of the outer circle positioning piece 8 on the clamped blade 7 and the like. The limiting block 122 can be conveniently disassembled from the limiting rod 12, and the upper part of the outer circle positioning piece 8 sleeved on the limiting rod 12 is limited by the limiting block 122, so as to avoid the phenomenon that the outer circle positioning piece 8 is separated from the limiting rod 12 during the transfer process.

[0056] Preferably, as shown in Figure 7 , the outer circle positioning piece 8 is provided with a limiting hole 81 of a polygonal structure on both sides, and the middle part of the limiting rod 12 is provided with a polygonal guide part. The limiting rod 12 is used for penetrating through the limiting hole 81 and cooperating with the limiting hole 81 through the guide part to guide the outer circle positioning piece 8 in the vertical direction.

[0057] It can be understood that in order to reduce the deviation of the outer circle positioning piece 8 during the lifting process, the outer circle positioning piece 8 is stably guided by the guide part of the polygonal structure cooperating with the limiting hole 81, and the outer circle positioning piece 8 is synchronously limited and guided by the limiting rods 12 on both sides, so as to ensure the consistency of the position of the outer circle positioning piece 8 and ensure that the outer circle positioning piece 8 realizes stable positioning function.

[0058] Preferably, as shown in Figure 1 , 5 , the electrode chuck assembly includes a chuck connecting rod 1, a chuck main body 2 and an electrode base 4. The first end of the chuck connecting rod 1 is used for cooperating with the main shaft of the machining machine tool, the second end of the chuck connecting rod 1 is used for connecting with the chuck main body 2, the chuck main body 2 is used for connecting with the electrode base 4, and the electrode base 4 is used for connecting with the electrode main body 6.

[0059] It can be understood that the electrode base 4 is connected with the chuck connecting rod 1 through the chuck main body 2, and the main shaft of the machining machine tool can drive the electrode base 4 and the electrode main body 6 to move through the chuck connecting rod 1, so as to realize the machining of the weight-reducing groove of the blade 7. The electrode main body 6 can be conveniently disassembled as a whole by disconnecting the electrode base 4 and the chuck main body 2, and different electrode main bodies 6 can be conveniently installed by replacing the electrode base 4. At the same time, the electrode main body 6 can also be directly disassembled from the electrode base 4, which is convenient for replacing the electrode main body 6, and after replacing the electrode main body 6, there is no need to repeat the alignment, which is beneficial to improve the overall machining efficiency.

[0060] Preferably, as shown in Figure 6 , the electrode chuck assembly further includes a chuck locking piece 3. The bottom of the chuck main body 2 is provided with a connecting hole, the connecting hole is used for cooperating with the top of the electrode base 4, the side wall of the connecting hole is provided with a connecting screw hole, and the chuck locking piece 3 is used for penetrating through the connecting screw hole and pressing the top of the electrode base 4 to lock and connect the electrode base 4 and the chuck main body 2.

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

[0062] It should be noted that the clamp locking piece 3 adopts a clamp locking bolt, which can conveniently realize the disassembly and assembly of the electrode base 4 by screwing the clamp locking bolt.

[0063] Preferably, as shown in Figure 5 The electrode base 4 is provided with a support platform for supporting the electrode body 6, and a plurality of locking screw holes are arranged in the annular array on the support platform, which are used to set the electrode locking piece 5 and lock and connect the electrode body 6 and the support platform through the electrode locking piece 5.

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

[0065] It should be noted that the electrode locking piece 5 adopts an electrode locking bolt, which is inserted through the positioning screw hole pre-set on the electrode body 6 and cooperates with the locking screw hole on the support platform, so as to realize the installation of the electrode body 6.

[0066] Preferably, as shown in Figure 8 The pressure block assembly further comprises a positioning piece 18 for positioning the outer edge of the blade 7 in cooperation with the outer edge plate pressure block 10.

[0067] It can be understood that the positioning piece 18 can assist in positioning the blade 7, so as to conveniently and quickly position and clamp the blade 7.

[0068] It should be noted that the positioning piece 18 is in a plate structure, and the positioning piece 18 is connected to the clamp base 9 through a bolt, so as to conveniently disassemble and assemble the positioning piece 18.

[0069] According to another aspect of the present application, a turbine guide vane weight-reducing groove machining method is also provided, which adopts the above turbine guide vane weight-reducing groove machining device, and comprises the following steps:

[0070] S100, the annular array of the blade 7 is placed on the clamp base 9, the inner edge plate of the blade 7 is pressed and limited by the inner edge plate pressure block 11, and the outer edge plate of the blade 7 is pressed and limited by the outer edge plate pressure block 10;

[0071] S200, the electrode body 6 is clamped by the electrode clamp head assembly, and then the electrode clamp head assembly is connected with the main shaft of the machining machine tool, so that the electrode body 6 coincides with the axis of the main shaft of the machining machine tool.

[0072] S300, positioning the electrode body 6 by the outer circular positioning member 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;

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

[0074] The present invention's method for machining a turbine guide vane weight reduction groove also exhibits the aforementioned beneficial effects. This includes maximizing the number of blade components clamped in a single clamping process, enabling simultaneous machining of all blade components. Furthermore, the outer circumferential locating member 8 provides an annular positioning function, assisting the electrode body 6 in quickly aligning the center of the annular array of blade components, avoiding multiple clamping and alignment of the electrode body 6 and improving component machining efficiency.

[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 includes other elements not explicitly listed, or also includes elements that are 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 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, there are objectively infinite specific structures. For ordinary technicians in this technical field, without departing from the principles of this application, they can make several improvements, modifications or changes, 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 protected by this application.

Claims

1. A device for machining weight-reducing slots in a turbine guide vane (7) in cooperation with a machining machine tool, characterized in that The turbine guide vane weight-reducing groove machining device comprises an electrode chuck assembly, an electrode body (6), an outer circle positioning piece (8), a clamp base (9), a jacking assembly and a limiting rod (12): The electrode chuck assembly is used for clamping the electrode body (6), and the electrode chuck assembly is also used for cooperating with the main shaft of the machining machine tool to drive the electrode body (6) to move, and the electrode body (6) is used for machining the weight-reducing groove of the vane (7); The clamp base (9) is used for supporting the vane (7), and a plurality of groups of pressing block assemblies are arranged in an annular array on the clamp base (9), the pressing block assemblies comprising outer edge plate pressing blocks (10) and inner edge plate pressing blocks (11), the inner edge plate pressing blocks (11) being used for pressing the inner edge plate of the vane (7), and the outer edge plate pressing blocks (10) being used for pressing the outer edge plate of the vane (7); The limiting rod (12) is arranged on both sides of the clamp base (9), the outer circle positioning piece (8) is used for being sleeved on the limiting rods (12) on both sides, a positioning circular hole is formed in the outer circle positioning piece (8), the center of the positioning circular hole coincides with the center of the clamp base (9), and the positioning circular hole is used for positioning 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 clamp base (9), the jacking assembly is connected with the outer circle positioning piece (8), and the jacking assembly is used for driving the outer circle positioning piece (8) to ascend and descend.

2. The turbine guide vane lightening slot machining apparatus of claim 1, wherein, The jacking assembly comprises a connecting rod (15), rotating rods (14), a handle (13) and a push rod (16), the connecting rod (15) is arranged in the bottom of the clamp base (9), the rotating rods (14) are arranged at 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 with the rotating rod (14), the second end of the push rod (16) is connected with the outer circle positioning piece (8), the handle (13) is used for driving the rotating rod (14) to rotate around the connecting rod (15), and then the push rod (16) drives the outer circle positioning piece (8) to ascend and descend along the limiting rod (12).

3. The turbine guide vane lightening slot machining apparatus of claim 2, wherein, The bottom of the outer circle positioning piece (8) is provided with a connecting block (17), the connecting block (17) is connected with the bottom of the outer circle positioning piece (8) through connecting bolts, and the connecting block (17) is used for being hinged with the second end of the push rod (16).

4. The turbine guide vane lightening slot machining apparatus according to claim 1 or 2, characterized by, The bottom of the limiting rod (12) is provided with a limiting portion (121), the limiting portion (121) is used for supporting and limiting the bottom of the outer circle positioning piece (8), the top of the limiting rod (12) is provided with a limiting block (122), the limiting block (122) is connected with the limiting rod (12) through threads, and the limiting block (122) is used for limiting the vertical ascending height of the outer circle positioning piece (8).

5. The turbine guide vane lightening slot machining apparatus according to claim 1 or 2, characterized by, The two sides of the outer circle positioning piece (8) are provided with limiting holes (81) of polygonal structure, the middle portion of the limiting rod (12) is provided with a polygonal guiding portion, and the limiting rod (12) is used for penetrating through the limiting holes (81) and cooperating with the limiting holes (81) through the guiding portion to guide the outer circle positioning piece (8) in the vertical direction.

6. The turbine guide vane lightening slot machining apparatus of claim 1, wherein, 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 for cooperating with the main shaft of the machining machine tool, the second end of the chuck connecting rod (1) is used for connecting with the chuck body (2), the chuck body (2) is used for connecting with the electrode base (4), and the electrode base (4) is used for connecting with the electrode body (6).

7. The turbine guide vane lightening slot machining apparatus of claim 6, wherein, The electrode chuck assembly further comprises a chuck locking piece (3), a connecting hole is arranged at the bottom of the chuck body (2), the connecting hole is used for cooperating with the top of the electrode base (4), a connecting screw hole is arranged in the side wall of the connecting hole, the chuck locking piece (3) is used for penetrating through the connecting screw hole and pressing the top of the electrode base (4) to lock and connect the electrode base (4) and the chuck body (2).

8. The turbine guide vane lightening slot machining apparatus of claim 6, wherein, The electrode base (4) is provided with a support platform for supporting the electrode body (6), and a plurality of locking screw holes are arranged in the annular array on the support platform, the locking screw holes are used for arranging the electrode locking piece (5) and locking and connecting the electrode body (6) and the support platform through the electrode locking piece (5).

9. The turbine guide vane lightening slot machining apparatus of claim 1, wherein, The briquetting assembly further comprises a positioning piece (18) for positioning the outer edge of the blade (7) in cooperation with the outer edge plate briquetting piece (10).

10. A method of machining a turbine guide vane lightening slot, characterized by, The turbine guide vane weight-reducing groove machining device comprises the following steps: S100, placing the annular array of blades (7) on the clamp base (9), and pressing and limiting the inner edge plate of the blade (7) through the inner edge plate briquetting piece (11) and pressing and limiting the outer edge plate of the blade (7) through the outer edge plate briquetting piece (10); S200, connecting the electrode chuck assembly and the main shaft of the machining machine tool after clamping the electrode body (6) through the electrode chuck assembly, so that the electrode body (6) coincides with the axis of the main shaft of the machining machine tool; S300, positioning the electrode body (6) through the outer circle positioning piece (8) to align the center of the clamp base (9), and then sequentially machining the weight-reducing grooves of the annular array of blades (7) through the electrode body (6); 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 repeatedly used after the consumed part is removed.

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