Fixture for linear cutting of low-pressure turbine guider of aero-engine
By designing a wire EDM fixture for low-pressure turbine guides of aero-engines, high-precision clamping is achieved by utilizing multiple positioning points and clamping components, solving the problem that existing fixtures cannot cut with high precision, and improving cutting accuracy and stability.
Patent Information
- Application Number
- CN202423129520.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-18
- Publication Date
- 2026-01-06
- Estimated Expiration
- 2034-12-18
AI Technical Summary
Existing fixtures are unable to perform high-precision clamping of the low-turbine guide of aero-engines, resulting in low wire cutting accuracy.
A fixture for wire cutting of a low-pressure turbine guide for an aero-engine is designed, including a base, a first positioning block, a second positioning block, a third positioning block, a first clamping assembly, and a positioning pin. The fixture restricts the degrees of freedom of the low-pressure turbine guide through multiple positioning points to achieve high-precision clamping, and the positioning pin and clamping assembly ensure cutting accuracy.
It improves the wire EDM accuracy of low-turbine guides, ensures stability during the cutting process, avoids guide deformation, and enhances the applicability and stability of the fixture.
Smart Images
Figure CN223762311U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of turbine guide technology, specifically a fixture for wire cutting of a low-pressure turbine guide for an aero-engine. Background Technology
[0002] Low-profile turbine guide vanes play a crucial role in turbocharging systems for aircraft engines. They act as the intake commander of the turbocharger, precisely guiding and accelerating the intake airflow toward the turbine impeller. Low-profile turbine guide vanes significantly improve engine efficiency and power output.
[0003] Currently, the manufacturing technology of low-pressure turbine guides is quite difficult and the structure is extremely complex. Because the existing fixtures cannot clamp the low-pressure turbine guides with high precision, the wire cutting accuracy of the low-pressure turbine guides is often low.
[0004] Therefore, a fixture for wire cutting of low-pressure turbine guide vanes for aero engines is provided to solve the above problems. Utility Model Content
[0005] The technical problem solved by this invention is how to improve the wire cutting accuracy of low-pressure turbine guides.
[0006] The technical solution of this utility model to solve the above-mentioned technical problems is as follows: A fixture for wire cutting of a low-pressure turbine guide for an aero-engine includes a base, a first positioning block, a second positioning block, a third positioning block, a first clamping component, and a positioning pin. The first positioning block is fixed on the base. The first positioning block has a circular mounting through hole and an opening communicating with the mounting through hole. The first clamping component is located in the opening and is fixedly connected to the base. A plurality of second positioning blocks are fixedly fixed at intervals along the circumference of the mounting through hole on the top end face of the first positioning block. A plurality of third positioning blocks are fixedly fixed at intervals along the circumference of the inner wall of the mounting through hole. The first positioning block has a positioning hole, and the positioning pin is installed in the positioning hole.
[0007] The beneficial effects of this utility model are: the low turbine guide is placed on the first positioning block, and multiple second positioning blocks and the first clamping assembly respectively abut against the upper part of the low turbine guide to form multiple positioning points, and multiple third positioning blocks abut against the side wall of the low turbine guide to form multiple positioning points. By restricting multiple degrees of freedom of the low turbine guide through multiple positioning points, high-precision clamping of the low turbine guide can be achieved.
[0008] Subsequently, the low turbine guide is adjusted to rotate circumferentially along the first positioning block until one of the reference holes on the upper part of the low turbine guide corresponds to the positioning hole. The low turbine guide is then fixed to the first positioning block by the positioning pin. The wire cutting machine is then driven to cut the low turbine guide, thereby improving the wire cutting accuracy of the turbine guide.
[0009] Based on the above technical solution, the present invention can be further improved as follows.
[0010] Furthermore, the number of the second positioning blocks is at least three, and the number of the third positioning blocks is at least two.
[0011] The beneficial effects of adopting the above-mentioned further solution are as follows: at least three second positioning blocks abutting against the upper part of the low turbine guide can form at least three positioning points, at least two third positioning blocks abutting against the outer wall of the low turbine guide can form at least two positioning points, and combined with the positioning point formed by the first clamping component abutting against the outer wall of the low turbine guide, at least six degrees of freedom of the turbine guide can be restricted through at least six positioning points, thereby achieving high-precision positioning of the turbine guide, ensuring the stability of the turbine guide during the wire cutting process, avoiding deformation of the turbine guide, and improving the wire cutting accuracy of the low turbine guide.
[0012] Furthermore, a plurality of second positioning blocks and a plurality of third positioning blocks are staggered along the circumference of the first positioning block.
[0013] The beneficial effect of adopting the above-mentioned further solution is that the multiple second positioning blocks and the multiple third positioning blocks are staggered, which can avoid forming the same positioning point with the low turbine guide when positioning, thus reducing the stability of positioning.
[0014] Furthermore, the plurality of second positioning blocks are evenly distributed along the circumference of the mounting through hole, and the plurality of third positioning blocks are evenly distributed along the circumference of the mounting through hole.
[0015] The beneficial effect of adopting the above-mentioned further solution is that the evenly spaced multiple second positioning blocks and multiple third positioning blocks can increase the stability of positioning and prevent the low turbine guide from shifting during the cutting process.
[0016] Furthermore, the angle α between the line connecting the positioning hole and the center of the first positioning block and the horizontal line is 5°ˉ10°.
[0017] Furthermore, the first clamping assembly includes a first clamping block, a second clamping block, a first guide block, and a second guide block. The first clamping block is located inside the opening and is fixedly connected to the base. The first guide block is fixed at both ends of the top of the first clamping block. The second guide block is fixed on one side of the top of the first clamping block. The second clamping block is detachably connected to the other side of the top of the first clamping block. The second clamping block slides in cooperation with the two first guide blocks.
[0018] The beneficial effect of adopting the above-mentioned further solution is that, before positioning the low turbine guide, the second clamping block is loosened first, and then the low turbine guide is placed on the first positioning block. Subsequently, the second clamping block is manually pushed along the axial direction of the first guide block and pressed against the low turbine guide to form a positioning point. Then the second clamping block is tightened to achieve high-precision positioning of the low turbine guide.
[0019] Furthermore, the second clamping block is provided with a plurality of third through holes at intervals, and a pin is installed in the third through hole. The pin is detachably connected to the first clamping block.
[0020] The beneficial effect of adopting the above-mentioned further solution is that the second clamping block can be manually pushed towards and clamped onto the low turbine guide via the third through hole. The pin prevents the second clamping block from falling off the first clamping block during movement.
[0021] Furthermore, it also includes a plurality of second clamping components, the positions of which correspond one-to-one with those of the plurality of second positioning blocks. The first positioning block is fixed with a plurality of support portions at intervals along its circumference, and the plurality of support portions are fixedly connected one-to-one with the plurality of second clamping components.
[0022] The beneficial effect of adopting the above-mentioned further solution is that after the low turbine guide is positioned, multiple second clamping components clamp the top of the low turbine guide, further improving the stability of the clamping and preventing the low turbine guide from shifting during the cutting process.
[0023] Furthermore, the second clamping assembly includes a third clamping block, a double-ended bolt, an adjusting screw, and a nut. The third clamping block corresponds one-to-one with the position of the second positioning block. One end of the adjusting screw is fixedly connected to the support part, and the other end of the adjusting screw is connected to the third clamping block. One end of the double-ended bolt is threadedly connected to the support part, and the other end of the double-ended bolt passes through the third clamping block and is threadedly connected to the nut.
[0024] The beneficial effects of adopting the above-mentioned further solution are as follows: Before positioning the low turbine guide, adjust the double-ended bolts and adjusting screws according to the thickness of the top of different models of low turbine guides so that the third clamping block is located above the low turbine guide; after the low turbine guide is positioned, adjust the double-ended bolts and adjusting screws again so that the third clamping block presses against the low turbine guide, thereby increasing the stability of the low turbine guide positioning, improving the wire cutting accuracy of the low turbine guide and the applicability of the fixture.
[0025] Furthermore, the base has a first through hole at both ends and a second through hole on one side.
[0026] The beneficial effects of adopting the above-mentioned further solution are: the base has a first through hole and a second through hole, which can reduce the weight of the base and facilitate its installation on the machine tool. Attached Figure Description
[0027] Figure 1 This is a schematic diagram of the fixture structure for wire cutting of the low-pressure turbine guide of this utility model.
[0028] Figure 2 This is one of the schematic diagrams of the first positioning block structure of this utility model;
[0029] Figure 3 This is the second schematic diagram of the first positioning block structure of this utility model;
[0030] Figure 4 This is a partial structural schematic diagram of the fixture for wire cutting of the low-pressure turbine guide of this utility model;
[0031] Figure 5 This is a schematic diagram of the structure of the first clamping component of this utility model;
[0032] Figure 6 This is a schematic diagram of the structure of the base of this utility model;
[0033] Figure 7 This is a diagram showing the usage state of the fixture for wire cutting of the low-pressure turbine guide of this utility model.
[0034] Figure 8 This is a top view of the low-pressure turbine guide of this utility model;
[0035] Figure 9 for Figure 8 A sectional view of HH;
[0036] Figure 10 This is a side view of the wire cutting fixture for the low-pressure turbine guide of this utility model;
[0037] Figure 11 This is a top view of the low-pressure turbine guide wire cutting fixture of this utility model;
[0038] Figure 12 This is a top view of the low-pressure turbine guide wire cutting fixture of this utility model along direction D.
[0039] The attached diagram lists the components represented by each number as follows:
[0040] 1. Base; 101. Positioning hole; 102. First through hole; 2. First positioning block; 201. Support part; 202. Positioning hole; 3. Second positioning block; 4. Third positioning block; 5. First clamping assembly; 501. First clamping block; 502. Second clamping block; 503. First guide block; 504. Second guide block; 505. Third through hole; 6. Positioning pin; 7. Second clamping assembly; 701. Third clamping block; 702. Double-ended bolt; 703. Adjusting screw; 704. Nut; 8. Low-pressure turbine guide. Detailed Implementation
[0041] 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.
[0042] like Figures 1-12 As shown, this embodiment provides a fixture for wire cutting of a low-pressure turbine guide vane for an aero-engine, including a base 1, a first positioning block 2, a second positioning block 3, a third positioning block 4, a first clamping assembly 5, and a positioning pin 6. The first positioning block 2 is fixed on the base 1. The first positioning block 2 has a circular mounting through hole and an opening 202 communicating with the mounting through hole. The first clamping assembly 5 is located in the opening 202 and is fixedly connected to the base 1. A plurality of second positioning blocks 3 are fixedly fixed at intervals along the circumference of the mounting through hole on the top end face of the first positioning block 2. A plurality of third positioning blocks 4 are fixedly fixed at intervals along the circumference of the inner wall of the mounting through hole. The first positioning block 2 has a positioning hole 101, and the positioning pin 6 is installed in the positioning hole 101.
[0043] The low turbine guide 8 is placed on the first positioning block 2. Multiple second positioning blocks 3 and the first clamping assembly 5 abut against the upper part of the low turbine guide 8 to form multiple positioning points. Multiple third positioning blocks 4 abut against the side wall of the low turbine guide 8 to form multiple positioning points. Multiple positioning points restrict multiple degrees of freedom of the low turbine guide 8, thereby achieving high-precision clamping of the low turbine guide 8.
[0044] Subsequently, the low turbine guide 8 is adjusted to rotate circumferentially along the first positioning block 2 until one of the reference holes on the upper part of the low turbine guide 8 corresponds to the position of the positioning hole 101. The low turbine guide 8 is then fixed to the first positioning block 2 by the positioning pin 6. The wire cutting machine is then driven to cut the low turbine guide 8 to improve the wire cutting accuracy of the turbine guide.
[0045] Specifically, the upper part of the low turbine guide 8 has nine reference holes. In use, first remove the positioning pin 6, then adjust the low turbine guide 8 to rotate circumferentially along the first positioning block 2 until one of the reference holes on the upper part of the low turbine guide 8 corresponds to the position of the positioning hole 101. Then, insert the positioning pin 6 into the positioning hole 101 to fix the low turbine guide 8 to the first positioning block 2. Next, drive the wire cutting machine to complete the first cut on the low turbine guide 8. Subsequently, continue rotating the low turbine guide 8 until the next reference hole corresponds to the position of the positioning hole 101 and complete the second cut. Repeat the above steps until all nine cuts on the low turbine guide 8 are completed.
[0046] Specifically, the fit clearance between the positioning pin 6 and the positioning hole 101 is 0.01mm to ensure the accuracy of the cutting position each time.
[0047] Among them, the nine reference holes on the upper part of the low turbine guide 8 are set at 40° intervals along its center circumference.
[0048] Specifically, the base 1 can be made of aluminum 7075, and anodizing is prohibited for the base 1 to achieve conductivity. The positioning pin 6 can be made of CrWMn mold steel, with a hardness of HRC58°-62° after heat treatment. The first positioning block 2, the second positioning block 3, and the third positioning block 4 can all be made of 45 steel, with a hardness of HRC35°-40° after heat treatment.
[0049] The base 1, the first positioning block 2, the second positioning block 3 and the third positioning block 4 can also be made of high-strength, wear-resistant and tough materials to resist the impact and vibration generated by the low turbine guide 8 during the cutting process.
[0050] Specifically, the upper part of the first positioning block 2 is an annular block, which has the same shape as the low turbine guide 8, thus preventing the low turbine guide 8 from deforming during the cutting process. Figure 10 As shown, the longitudinal section of the base 1 is an isosceles triangle. Both ends of the base 1 are fixed with extensions, the width of which is 10mm, to facilitate the placement of the base 1 in the reserved position on the machine tool.
[0051] One side of the base 1 is threadedly fixed to the first positioning block 2. The first clamping assembly 5 is threadedly fixed to one side of the base 1.
[0052] Specifically, such as Figure 12 As shown, the first positioning block 2 may have only one positioning hole 101, or it may have nine positioning holes 101 spaced apart along the circumference of the first positioning block 2, with the nine positioning holes 101 spaced 40° apart along its center circumference.
[0053] The upper end of the positioning pin 6 is flat, making it easy to remove or insert by hand. A through hole can be opened in the middle of the positioning pin 6 for threading a rope, and it can be stored together with the first positioning block 2 to prevent loss.
[0054] Based on the above scheme, the number of the second positioning blocks 3 is at least three, and the number of the third positioning blocks 4 is at least two.
[0055] At least three second positioning blocks 3 abut against the upper part of the low turbine guide 8 to form at least three positioning points, and at least two third positioning blocks 4 abut against the outer wall of the low turbine guide 8 to form at least two positioning points. Combined with the positioning point formed by the first clamping component 5 abutting against the outer wall of the low turbine guide 8, at least six degrees of freedom of the turbine guide 8 can be restricted by at least six positioning points, so as to achieve high-precision positioning of the turbine guide 8, ensure the stability of the turbine guide 8 in the wire cutting process, avoid deformation of the turbine guide 8, and improve the wire cutting accuracy of the low turbine guide.
[0056] Specifically, such as Figure 2 and Figure 3 As shown, this embodiment includes three second positioning blocks 3 and two third positioning blocks 4.
[0057] The second positioning block 3 and the third positioning block 4 are both rectangular, which increases the contact area with the low turbine guide 8 and enhances the stability of their positioning with the low turbine guide 8. Alternatively, the second positioning block 3 and the third positioning block 4 can be made into squares according to actual needs.
[0058] Additionally, the second positioning block 3 has a length of 50mm–80mm and a width of 3mm–8mm. Preferably, the second positioning block 3 has a length of 62mm and a width of 4.8mm.
[0059] The third positioning block 4 has a length of 50mm-100mm and a width of 3mm-8mm. Preferably, the third positioning block 4 has a length of 82mm and a width of 4.8mm.
[0060] Based on the above scheme, multiple second positioning blocks 3 and multiple third positioning blocks 4 are staggered along the circumference of the first positioning block 2.
[0061] The multiple second positioning blocks 3 and the multiple third positioning blocks 4 are staggered to avoid forming the same positioning point with the low turbine guide 8 during positioning, thus reducing the stability of positioning.
[0062] Specifically, the positions of the multiple second positioning blocks 3 and the multiple third positioning blocks 4 are also staggered with those of the first pressing component 5.
[0063] Based on the above scheme, multiple second positioning blocks 3 are evenly distributed along the circumference of the mounting through hole, and multiple third positioning blocks 4 are evenly distributed along the circumference of the mounting through hole.
[0064] The evenly spaced arrangement of multiple second positioning blocks 3 and multiple third positioning blocks 4 can increase the stability of positioning and prevent the low turbine guide 8 from shifting during the cutting process.
[0065] Specifically, such as Figure 2 As shown, the three second positioning blocks 3 are spaced 120° apart circumferentially along the first positioning block 2. Since the low turbine guide 8 is in an inclined state during cutting, the two third positioning blocks 4 can be located at the lower ends of the inner wall of the first positioning block 2 and are symmetrically arranged.
[0066] Among them, the multiple second positioning blocks 3 and the multiple third positioning blocks 4 can also be set with uneven spacing.
[0067] Based on the above scheme, the angle α between the line connecting the positioning hole 101 and the center of the first positioning block 2 and the horizontal line is 5°ˉ10°.
[0068] Specifically, such as Figure 8 As shown, in this embodiment, the angle α between the line connecting the center of the positioning hole 101 and the center of the first positioning block 2 and the horizontal line is 6°.
[0069] The plane where the positioning hole 101 and the center of the first positioning block 2 are located can be the cutting surface of the cutting machine.
[0070] Based on the above scheme, the first pressing component 5 includes a first pressing block 501, a second pressing block 502, a first guide block 503, and a second guide block 504. The first pressing block 501 is located inside the opening 202 and is fixedly connected to the base 1. The first guide block 503 is fixed at both ends of the top of the first pressing block 501. The second guide block 504 is fixed on one side of the top of the first pressing block 501. The second pressing block 502 is detachably connected to the other side of the top of the first pressing block 501. The second pressing block 502 slides in cooperation with the two first guide blocks 503.
[0071] Before positioning the low turbine guide 8, loosen the second clamping block 502 and place the low turbine guide 8 on the first positioning block 2. Then, manually push the second clamping block 502 along the axial direction of the first guide block 503 and press the low turbine guide 8 to form a positioning point. Then tighten the second clamping block 502 to achieve high-precision positioning of the low turbine guide 8.
[0072] Specifically, the bottom of the first clamping block 501 is threadedly fixed to the base 1.
[0073] The two ends of the two first guide blocks 503 abut against the two ends of the first positioning block 2, respectively.
[0074] In addition, the second clamping block 502 has sliders at both ends of its bottom, and each of the two first guide blocks 503 has a groove at one end facing each other. The sliders are slidably connected to the grooves, allowing the second clamping block 502 to move axially along the first guide blocks 503 within a certain range, thus enabling more precise positioning of the low-turbine guide 8. The two first guide blocks 503 guide the movement of the second clamping block 502.
[0075] Based on the above scheme, the second pressing block 502 is provided with a plurality of third through holes 505 at intervals, and a pin is installed in the third through hole 505. The pin is detachably connected to the first pressing block 501.
[0076] The second clamping block 502 can be manually pushed toward and clamped onto the low turbine guide 8 through the third through hole 505. The pin prevents the second clamping block 502 from falling off the first clamping block 501 during movement.
[0077] Specifically, the diameter of the pin is smaller than the diameter of the third through hole 505. The second clamping block 502 is fixedly connected to the first clamping block 501 by the pin.
[0078] The side of the second clamping block 502 away from the second guide block 504 is an arc surface, which ensures better contact with the side wall of the low turbine guide 8.
[0079] Based on the above scheme, it also includes a plurality of second pressing components 7, the positions of the plurality of second pressing components 7 and the plurality of second positioning blocks 3 are one-to-one, the first positioning block 2 is fixed with a plurality of support parts 201 at intervals along its circumference, and the plurality of support parts 201 are fixedly connected to the plurality of second pressing components 7 one-to-one.
[0080] After the low turbine guide 8 is positioned, multiple second clamping components 7 clamp the top of the low turbine guide 8 to further improve the stability of the clamping and prevent the low turbine guide 8 from shifting during the cutting process.
[0081] Specifically, such as Figure 4 As shown, this embodiment includes three second clamping components 7. Multiple second clamping components 7 can also be provided according to actual needs.
[0082] The first positioning block 2 is fixed with a support portion 201 at intervals along the circumference, and the second pressing component 7 is fixed on the support portion 201.
[0083] Based on the above scheme, the second clamping assembly 7 includes a third clamping block 701, a double-ended bolt 702, an adjusting screw 703, and a nut 704. The third clamping block 701 corresponds one-to-one with the position of the second positioning block 3. One end of the adjusting screw 703 is fixedly connected to the support part 201, and the other end of the adjusting screw 703 is connected to the third clamping block 701. One end of the double-ended bolt 702 is threadedly connected to the support part 201, and the other end of the double-ended bolt 702 passes through the third clamping block 701 and is threadedly connected to the nut 704.
[0084] Before positioning the low turbine guide 8, adjust the double-ended bolt 702 and adjusting screw 703 according to the thickness of the top of the low turbine guide 8 of different models, so that the third clamping block 701 is located above the low turbine guide 8; after the low turbine guide 8 is positioned, adjust the double-ended bolt 702 and adjusting screw 703 again so that the third clamping block 701 presses the low turbine guide 8, thereby increasing the stability of the positioning of the low turbine guide 8, improving the wire cutting accuracy of the low turbine guide and the applicability of the fixture.
[0085] Based on the above scheme, both ends of the base 1 have a first through hole 102, and one side of the base 1 has a second through hole 103.
[0086] The base 1 has a first through hole 102 and a second through hole 103, which can reduce the weight of the base 1 and make it easier to install on a machine tool.
[0087] Specifically, this allows the wire cutting machine to pass through the second through hole 103 and the first positioning block 2 sequentially to cut the low turbine guide 8, such as... Figure 11 and Figure 12 As shown, this is the theoretical cutting surface of the cutting wire.
[0088] The first through holes 102 at both ends of the base 1 are symmetrically arranged.
[0089] In this embodiment, during use, the low turbine guide 8 is placed on the first positioning block 2, such that at least three second positioning blocks 3 abut against the upper part of the low turbine guide 8 to form at least three positioning points, and at least two third positioning blocks 4 abut against the outer wall of the low turbine guide 8 to form at least two positioning points; then the second pressing block 502 is manually pushed along the axial direction of the first guide block 503 and pressed against the low turbine guide 8 to form a positioning point, thus completing the positioning of the low turbine guide 8;
[0090] Then adjust the double-ended bolt 702 and adjusting screw 703 so that the third clamping block 701 clamps the low turbine guide 8, further increasing the stability of the positioning of the low turbine guide 8;
[0091] Subsequently, the low turbine guide 8 is rotated circumferentially along the first positioning block 2 until one of the reference holes on the upper part of the low turbine guide 8 corresponds to the position of the positioning hole 101. Then, the positioning pin 6 is inserted into the positioning hole 101 to fix the low turbine guide 8 to the first positioning block 2. The wire cutting machine is then driven to complete the first cut on the low turbine guide 8. The low turbine guide 8 is rotated until the next reference hole corresponds to the position of the positioning hole 101 and the second cut is completed. The above steps are repeated until the low turbine guide 8 has been cut nine times.
[0092] In the description of this utility model, it should be understood that the terms "center", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "axial", "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.
[0093] 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.
[0094] 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.
[0095] 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.
[0096] 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.
[0097] 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. An aircraft engine low pressure turbine guide wire sawing fixture, characterized by, The utility model relates to a positioning device for the first positioning block (2) and the second positioning block (3) are fixed on the base (1) and the third positioning block (4) is fixed on the installation through -hole wall, and the first positioning block (2) is provided with the positioning hole (101) and the positioning pin (6) is installed in the positioning hole (101), so that the first positioning block (2) and the second positioning block (3) can be fixed on the base (1) and the third positioning block (4) can be fixed on the installation through -hole wall, and the first positioning block (2) can be fixed on the base (1) and the third positioning block (4) can be fixed on the installation through -hole wall.
2. The linear cutting fixture for a low pressure turbine nozzle of a gas turbine engine as set forth in claim 1, wherein, The number of the second positioning block (3) is at least three, and the number of the third positioning block (4) is at least two.
3. The linear cutting fixture for a low pressure turbine nozzle of a gas turbine engine as set forth in claim 1, wherein, The plurality of second positioning blocks (3) and the plurality of third positioning blocks (4) are staggered along the circumference of the first positioning block (2).
4. The linear cutting fixture for a low pressure turbine nozzle of a gas turbine engine as set forth in claim 1, wherein, The plurality of second positioning blocks (3) are evenly distributed along the circumference of the installation through -hole, and the plurality of third positioning blocks (4) are evenly distributed along the circumference of the installation through -hole.
5. The linear cutting fixture for a low pressure turbine nozzle of a gas turbine engine as set forth in claim 1, wherein, The included angle a between the line connecting the positioning hole (101) and the center of the first positioning block (2) and the horizontal line is 5°-10°.
6. The linear cutting fixture for a low pressure turbine nozzle of a gas turbine engine as set forth in claim 1, wherein, The first pressing assembly (5) comprises a first pressing block (501), a second pressing block (502), a first guide block (503) and a second guide block (504), the first pressing block (501) is located in the opening (202) and is fixedly connected with the base (1), both ends of the top of the first pressing block (501) are fixedly connected with the first guide block (503), one side of the top of the first pressing block (501) is fixedly connected with the second guide block (504), and the other side of the top of the first pressing block (501) is detachably connected with the second pressing block (502), and the second pressing block (502) is slidably connected with the two first guide blocks (503).
7. The linear cutting fixture for a low pressure turbine nozzle of a gas turbine engine as set forth in claim 6, wherein, A plurality of third through holes (505) are arranged at intervals on the second pressing block (502), pins are installed in the third through holes (505), and the pins are detachably connected with the first pressing block (501).
8. The linear cutting fixture for a low pressure turbine nozzle of a gas turbine engine as set forth in claim 1, wherein, A plurality of second pressing assemblies (7) are further included, the plurality of second pressing assemblies (7) correspond one by one to the positions of the plurality of second positioning blocks (3), a plurality of support portions (201) are fixed at intervals along the circumference of the first positioning block (2), and the plurality of support portions (201) are fixedly connected with the plurality of second pressing assemblies (7) one by one.
9. The apparatus of claim 8 wherein, The second pressing assembly (7) comprises third pressing blocks (701), stud bolts (702), adjusting screws (703) and nuts (704), the third pressing blocks (701) are in one-to-one correspondence with the second positioning blocks (3), one end of the adjusting screw (703) is fixedly connected with the support part (201), the other end of the adjusting screw (703) is connected with the third pressing block (701), one end of the stud bolt (702) is threadedly connected with the support part (201), the other end of the stud bolt (702) passes through the third pressing block (701) and is threadedly connected with the nut (704).
10. The fixture for linear cutting of a low pressure turbine nozzle of a gas turbine engine as set forth in any one of claims 1-9, wherein, Both ends of the base (1) are provided with first through holes (102), and one side of the base (1) is provided with a second through hole (103).