Splicable electro-processing interference hole guide sleeve

Abstract

The utility model relates to a kind of spliced electroprocessing interference hole guide bush, involve turbine guide vane processing technical field of aero-engine, including machine tool connecting section, straight section and curved section to form electrode wire perforation with all being through opening structure, one end of the machine tool connecting section is used to be detachably connected to machine tool, one end of the straight section is detachably connected to the other end of the machine tool connecting section, one end of the curved section is detachably connected to the other end of the straight section, the other end of the curved section is bent relative to its one end and forms obtuse angle included angle.The utility model can relatively shorten tooling production cycle, reduce tooling cost.

Description

Technical Field

[0001] This utility model relates to the field of aero-engine turbine guide blade processing technology, and in particular to a splicable EDM interference hole guide sleeve. Background Technology

[0002] Aero-engine turbine blades operate in extreme environments of high temperature and high pressure for extended periods. To improve their high-temperature resistance, compressed air is typically introduced into the internal cavities of the blade and allowed to flow out through micropores on the blade surface, forming a cooling film. Currently, micropores on the blade are commonly created using electrical discharge machining (EDM). This process uses a slender copper electrode, guided by a guide sleeve, to gradually approach the area to be processed on the blade. A discharge occurs between the electrode and the workpiece, etching away material to form micropores. During processing, the guide sleeve remains fixed while the electrode is continuously fed until the desired micropores are machined on the blade surface.

[0003] However, when dealing with certain multi-blade structures, due to the complex geometry and limited space between the blades, straight guide sleeves inevitably interfere with the blades, preventing the electrodes from approaching the machining area via a straight path. To solve this interference problem, the guide sleeve is usually designed with a curved shape to bypass the obstacle area. However, currently, for different interference situations, curved guide sleeves with specific angles and lengths often need to be designed individually, resulting in a wide variety of guide sleeves with strong specialization requirements.

[0004] This "one hole, one guide sleeve" method not only significantly increases the number of tooling designs and manufacturing processes, but also extends the production preparation cycle and increases manufacturing costs, making it difficult to meet the needs of multi-variety, small-batch blade production. Utility Model Content

[0005] This invention provides a splicable EDM interference hole guide sleeve, which can relatively shorten the tooling manufacturing cycle and reduce tooling costs.

[0006] The technical solution of this utility model to solve the above-mentioned technical problems is as follows: A splicable EDM interference hole guide sleeve includes a machine tool connecting section, a straight section, and a curved section, all having a through-open structure to form electrode wire through holes. One end of the machine tool connecting section is detachably connected to a machine tool. One end of the straight section is detachably connected to the other end of the machine tool connecting section. One end of the curved section is detachably connected to the other end of the straight section. The other end of the curved section is bent relative to its first end to form an obtuse angle.

[0007] The beneficial effects of this utility model are as follows: by guiding the curved end of the curved section, the blade can be avoided, and the electrode wire can be guided to the predetermined blade processing position. When processing different positions, the straight section and / or curved section can be quickly removed and replaced with a straight section and / or curved section of the corresponding size. In this way, only a number of straight sections and / or curved sections need to be prepared, and the entire guide sleeve is no longer required. This reduces the number of guide sleeves, shortens the tooling manufacturing cycle, reduces tooling costs, and eliminates the need for repeated disassembly and assembly of the guide sleeve and the machine tool, enabling quick replacement and saving electrical discharge machining time.

[0008] Based on the above technical solution, the present invention can be further improved as follows.

[0009] Furthermore, the other end of the machine tool connecting section is provided with an internal threaded hole, and one end of the straight section is fixedly connected to a threaded connecting section that is adapted and threaded to the internal threaded hole, and the threaded connecting section has an opening to form an electrode wire through hole.

[0010] Furthermore, a stop is fixedly connected to the outer side of the straight segment, and the stop abuts against the end of the machine tool connecting segment.

[0011] Furthermore, the outer sides of the stop table and the machine tool connection section are simultaneously covered with adhesive tape, or the outer sides of the threaded connection section and the machine tool connection section are simultaneously covered with adhesive tape.

[0012] Furthermore, two clamping blocks are fixedly connected to the other end of the straight segment. The two clamping blocks are arranged in parallel and spaced apart, and their ends extend out of the straight segment. At least two screws are passed through one of the clamping blocks, and each screw is threaded to the other clamping block. The end of the curved segment is clamped by the two clamping blocks and abuts against the straight segment.

[0013] Furthermore, the end sidewall of the curved section is provided with two opposing clamping planes, which are respectively used to abut against the two clamping blocks.

[0014] Furthermore, the surface where the straight segment and the curved segment abut against each other is a first curved surface structure.

[0015] Furthermore, two positioning blocks are fixedly connected to the end sidewall of the curved section. The two positioning blocks abut against the two clamping blocks respectively, and the surfaces of the two positioning blocks abutting against the corresponding clamping blocks are second curved surface structures.

[0016] Furthermore, one end of the curved section is provided with a guide ring surface that connects to the electrode wire through hole.

[0017] Furthermore, it also includes a ceramic segment with a through-open structure to form an electrode wire perforation, one end of which is detachably connected to the other end of the curved segment. Attached Figure Description

[0018] Figure 1 This is a structural diagram of the present invention; Figure 2 This is an exploded view of the present invention; Figure 3 For the present utility model Figure 2 A magnified view of the local structure; Figure 4 This is a cross-sectional view of the present invention; Figure 5 For the present utility model Figure 4 A magnified view of the local structure; Figure 6 This is a processing diagram showing the electrode wire processing multiple blades through a guide sleeve in related technologies.

[0019] The attached diagram lists the components represented by each number as follows: 1. Machine tool connecting section; 11. Internal threaded hole; 2. Straight section; 21. Threaded connection section; 22. Stop table; 23. Clamping block; 24. Screw; 3. Bending section; 31. Clamping plane; 32. First curved surface structure; 33. Positioning block; 34. Second curved surface structure; 35. Guide ring surface; 4. Ceramic section; 5. Blade; 6. Guide sleeve; 7. Electrode wire. Detailed Implementation

[0020] The principles and features of this utility model are described below with reference to the accompanying drawings. The examples given are only for explaining this utility model and are not intended to limit the scope of this utility model.

[0021] In existing technologies, such as Figure 6 When machining multi-blade assembly, interference can occur between the guide sleeve 6 and the blade 5. The electrode wire 7 cannot perform micro-hole machining on the blade through the straight guide sleeve 6. Therefore, the guide sleeve 6 needs to be designed to be bent to avoid interference. Consequently, if the existing interference hole guide sleeve 6 is designed and manufactured at every different angle and length, a large number are required, leading to increased manufacturing cycle and cost.

[0022] To address the aforementioned issues, this invention provides a splicable EDM interference hole guide sleeve, as detailed below.

[0023] Example 1 like Figures 1-5A splicable EDM interference hole guide sleeve includes a machine tool connecting section 1, a straight section 2, and a curved section 3, all of which have through-open structures to form electrode wire through holes. One end of the machine tool connecting section 1 is detachably connected to a machine tool. One end of the straight section 2 is detachably connected to the other end of the machine tool connecting section 1. One end of the curved section 3 is detachably connected to the other end of the straight section 2. The other end of the curved section 3 is bent relative to one end of it and forms an obtuse angle.

[0024] The beneficial effects of this embodiment are: when processing different positions, the straight segment 2 and / or the curved segment 3 can be quickly removed and replaced with the corresponding straight segment 2 and / or curved segment 3. In this way, only multiple sets of straight segments 2 and / or curved segments 3 need to be prepared, and the entire guide sleeve 6 no longer needs to be prepared. This relatively reduces the number of guide sleeves 6, shortens the tooling manufacturing cycle, reduces tooling costs, and eliminates the need for repeated disassembly and assembly of the guide sleeve 6 and the machine tool, achieving rapid replacement and relatively saving electrical discharge machining time.

[0025] Specifically, when performing electrical discharge machining on multi-section blades, a curved section 3 with a suitable bending angle is selected, and the curved section 3, the straight section 2, and the machine tool connecting section 1 are connected in sequence. One end of the machine tool connecting section 1 is connected to the machine tool, so that the electrode wire 7 passes through the electrode wire through holes of the machine tool connecting section 1, the straight section 2, and the curved section 3 in sequence. In this way, the blade can be avoided by the guidance of the curved end of the curved section 3, and the electrode wire 7 can be guided to the predetermined blade processing position.

[0026] The angle of the obtuse angle formed by the curved segment 3 can be 95°, 100°, 105°, 110°, 115°, 120°, 125°, 130°, 135°, 140°, 145°, 150°, 155°, 160°, 165°, 170° or 175°, etc.

[0027] Example 2 like Figures 2-5 Based on embodiment 1, the other end of the machine tool connecting section 1 is provided with an internal threaded hole 11, and one end of the straight section 2 is fixedly connected to a threaded connecting section 21 that is adapted and threaded to the internal threaded hole 11. The threaded connecting section 21 has an opening through which an electrode wire through hole is formed.

[0028] The advantage of adopting the preferred solution in the above embodiments is that the straight section 2 and the machine tool connecting section 1 can be quickly disassembled and assembled by means of threaded connection section 21 to machine tool connecting section 1, and the corresponding length dimension of straight section 2 can be replaced.

[0029] Furthermore, during installation, the straight section 2 can be extended or retracted relative to the machine tool connecting section 1 by changing the screw length of the threaded connection section 21, thereby changing the length of the entire guide sleeve. At the same time, the guide angle of the curved section 3 can be changed by rotating the threaded connection section 21 relative to the machine tool connecting section 1, thereby achieving multi-directional electrode wire guidance.

[0030] Example 3 like Figure 1 and Figure 2 Based on embodiments 1 and 2, a stop table 22 is fixedly connected to the outer side of the straight segment 2, and the stop table 22 abuts against the end of the machine tool connecting segment 1.

[0031] The beneficial effect of adopting the preferred solution in the above embodiments is that when the straight segment 2 is screwed in so that the straight segment 2 is threadedly connected to the machine tool connecting segment 1 through the threaded connecting segment 21, the stop table 22 abuts against the end of the machine tool connecting segment 1 to achieve the limiting.

[0032] Example 4 Based on embodiments 1-3, the outer sides of the stop table 22 and the machine tool connecting section 1 are simultaneously covered with adhesive tape, or the outer sides of the threaded connecting section 21 and the machine tool connecting section 1 are simultaneously covered with adhesive tape.

[0033] The beneficial effect of adopting the preferred solution in the above embodiments is that, after the straight segment 2 is screwed into place, a tape layer is formed by wrapping tape to achieve relative fixation between the machine tool connecting section 1 and the straight segment 2, thereby preventing the straight segment 2 from rotating relative to the machine tool connecting section 1 during use.

[0034] Example 5 like Figures 2-5 Based on embodiments 1-4, two clamping blocks 23 are fixedly connected to the other end of the straight segment 2. The two clamping blocks 23 are arranged in parallel and spaced apart, and their ends extend out of the straight segment 2. At least two screws 24 are passed through one of the clamping blocks 23, and each screw 24 is threaded to the other clamping block 23. The end of the curved segment 3 is clamped by the two clamping blocks 23 and abuts against the straight segment 2.

[0035] The beneficial effect of the preferred solution in the above embodiments is that when the bending section 3 needs to be replaced, the bending section 3 can be pulled out and quickly replaced by loosening each screw 24. In use, the bending section 3 is clamped by two clamping blocks 23, which can ensure the stability of the bending section 3 in guiding the electrode wire 7.

[0036] Example 6 like Figure 2 and Figure 3Based on embodiments 1-5, the end sidewall of the curved section 3 is provided with two opposing clamping planes 31, which are respectively used to abut against two clamping blocks 23.

[0037] The beneficial effect of the preferred solution in the above embodiments is that when the two clamping blocks 23 clamp the curved section 3, the two clamping planes 31 respectively abut against the two clamping blocks 23 to form a planar contact, so as to ensure the clamping stability of the curved section 3 by the two clamping blocks 23.

[0038] Example 7 like Figures 2-5 Based on embodiments 1-6, the surface where the straight segment 2 and the curved segment 3 abut against each other is the first curved surface structure 32.

[0039] The beneficial effect of the preferred solution in the above embodiments is that when the curved segment 3 is inserted between the two clamping blocks 23 and docked with the straight segment 2, the first curved surface structure 32 can form a positioning function to ensure the coaxiality of the docking of the ends of the curved segment 3 and the straight segment 2.

[0040] As one of the parallel schemes of the above embodiments, the end face of the straight segment 2 is a first concave structure, and the end face of the curved segment 3 is a first convex structure.

[0041] As a second parallel scheme of the above embodiments, the end face of the straight segment 2 is a first convex structure, and the end face of the curved segment 3 is a first concave structure.

[0042] Example 8 like Figures 2-5 Based on embodiments 1-7, two positioning blocks 33 are fixedly connected to the end sidewall of the curved section 3. The two positioning blocks 33 abut against the two clamping blocks 23 respectively, and the surfaces of the two positioning blocks 33 abutting against the corresponding clamping blocks 23 are the second curved surface structure 34.

[0043] The beneficial effect of the preferred solution in the above embodiments is that when the curved segment 3 is inserted between the two clamping blocks 23 and docked with the straight segment 2, the second curved surface structure 34 can form a positioning function to ensure the coaxiality of the docking of the ends of the curved segment 3 and the straight segment 2. At the same time, the positioning of the second curved surface structure 34 ensures that the curved segment 3 and the straight segment 2 are docked in place.

[0044] As one of the parallel solutions of the above embodiments, the end side of the clamping block 23 is a second concave structure, and the end side of the positioning block 33 is a second convex structure.

[0045] As a second parallel scheme of the above embodiments, the end side of the clamping block 23 is a second convex structure, and the end side of the positioning block 33 is a second concave structure.

[0046] Example 9 like Figure 4 and Figure 5 Based on embodiments 1-8, one end of the bent section 3 is provided with a guide ring surface 35 that connects to the electrode wire through hole.

[0047] The advantage of adopting the preferred solution in the above embodiments is that it guides the electrode wire 7 into the bent section 3 through the guide ring surface 35.

[0048] Example 10 like Figure 2 and Figure 4 Based on embodiments 1-9, the splicable EDM interference hole guide sleeve of this utility model also includes a ceramic segment 4 with a through-open structure to form an electrode wire through hole, one end of the ceramic segment 4 being detachably connected to the other end of the bent segment 3.

[0049] The advantages of the preferred solution in the above embodiments are that, during processing, the ceramic segment 4 can prevent the arc generated between the guide sleeve and the blade 5 from damaging the blade 5. At the same time, the ceramic segment 4 can withstand the high temperature environment during electrode processing and adopts a detachable installation method, which is convenient for immediate replacement after damage.

[0050] As a specific embodiment of the above, the ceramic segment 4 can be connected to the bent segment 3 by means of interference fit, snap-fit, or threaded connection.

[0051] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to 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 this utility model.

[0052] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0053] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; 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; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0054] In this utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0055] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0056] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A splicable electrically machined interference hole guide sleeve, characterized in that, It includes a machine tool connecting section (1), a straight section (2), and a curved section (3), all of which have a through-open structure to form electrode wire perforations. One end of the machine tool connecting section (1) is detachably connected to the machine tool. One end of the straight section (2) is detachably connected to the other end of the machine tool connecting section (1). One end of the curved section (3) is detachably connected to the other end of the straight section (2). The other end of the curved section (3) is bent relative to one end of it and forms an obtuse angle.

2. The splicable EDM interference hole guide sleeve according to claim 1, characterized in that, The other end of the machine tool connecting section (1) is provided with an internal threaded hole (11), and one end of the straight section (2) is fixedly connected to a threaded connecting section (21) that is adapted to and threaded to the internal threaded hole (11). The threaded connecting section (21) has an opening to form an electrode wire through hole.

3. The splicable EDM interference hole guide sleeve according to claim 2, characterized in that, A stop plate (22) is fixedly connected to the outside of the straight section (2), and the stop plate (22) abuts against the end of the machine tool connecting section (1).

4. The splicable EDM interference hole guide sleeve according to claim 3, characterized in that, The outer sides of the stop plate (22) and the machine tool connecting section (1) are simultaneously covered with adhesive tape, or the outer sides of the threaded connecting section (21) and the machine tool connecting section (1) are simultaneously covered with adhesive tape.

5. The splicable EDM interference hole guide sleeve according to claim 1, characterized in that, Two clamping blocks (23) are fixedly connected to the other end of the straight segment (2). The two clamping blocks (23) are arranged in parallel and spaced apart, and their ends extend out of the straight segment (2). At least two screws (24) are passed through one of the clamping blocks (23), and each screw (24) is threaded to the other clamping block (23). The end of the curved segment (3) is clamped by the two clamping blocks (23) and abuts against the straight segment (2).

6. The splicable EDM interference hole guide sleeve according to claim 5, characterized in that, The end sidewall of the curved section (3) is provided with two opposing clamping planes (31), which are respectively used to abut against the two clamping blocks (23).

7. The splicable EDM interference hole guide sleeve according to claim 5, characterized in that, The surface where the straight segment (2) and the curved segment (3) abut each other is a first curved surface structure (32).

8. The splicable EDM interference hole guide sleeve according to claim 5, characterized in that, Two positioning blocks (33) are fixedly connected to the end sidewall of the curved section (3). The two positioning blocks (33) abut against the two clamping blocks (23) respectively, and the surfaces of the two positioning blocks (33) abutting against the corresponding clamping blocks (23) are the second curved surface structure (34).

9. The splicable EDM interference hole guide sleeve according to claim 1, characterized in that, One end of the curved section (3) is provided with a guide ring (35) that connects to the electrode wire through hole.

10. A splicable EDM interference hole guide sleeve according to any one of claims 1-9, characterized in that, It also includes a ceramic segment (4) with a through-open structure to form an electrode wire perforation, one end of which is detachably connected to the other end of the curved segment (3).

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