Device and method for detecting bi-shouldered vane profile

Abstract

The application discloses a kind of detection device and method of double journal vane profile, detection device is mainly by bottom plate, journal end surface positioning center, blade body positioning support, round bar standard parts, cross section pin, board and movable center, with back to profile template and basin to profile template cooperation is used to complete to vane profile detection.Detection, respectively through journal end surface positioning center and movable center tight double journal vane two ends of journal, through blade body positioning support positioning blade body profile, then use back to profile template and basin to profile template cooperate board to carry out gap measurement, to complete detection.The present application can be positioned to the blade body profile that leaves different allowance, avoids the situation that blade body profile is not positioned, so that the detection device of this structure can be used in different stages of same blade production, and detection efficiency is high.

Description

Technical Field

[0001] This invention belongs to the field of aero-engine blade manufacturing technology, specifically a detection device and method for the profile of a double-judge blade. Background Technology

[0002] In aero-engines, blades are crucial components determining the engine's energy conversion efficiency. They operate in extremely harsh environments, undergoing high temperature, high pressure, and high speed, bearing significant stress and experiencing complex load conditions. Therefore, strictly controlling the machining quality of blades is a key issue in blade manufacturing. The blade profile is a core challenge in blade machining and inspection due to its complex structure, high measurement accuracy requirements, and complex data processing. Consequently, inspecting the shape and dimensions of blade profiles has always been one of the major challenges faced by production and inspection departments in aero-engine manufacturing companies. Summary of the Invention

[0003] The present invention aims to provide a device and method for detecting the profile of a dual-judgement blade, which meets the positioning requirements of the dual judgements when detecting the profile of a dual-judgement blade, solves the problem of unstable blade positioning of a dual-judgement blade, and can complete the detection of the blade profile shape and size after the blade is positioned.

[0004] To achieve the above objectives, the present invention adopts the following technical solution:

[0005] The device for detecting the profile of a double-judge blade includes:

[0006] Base plate;

[0007] A journal end face positioning center is fixed to the upper end face of the base plate, and a center with a variable position is provided on the journal end face positioning center.

[0008] The movable tip is slidably connected to the end face of the base plate;

[0009] The blade positioning bracket is detachably connected to the upper surface of the base plate and is located between the line connecting the positioning center and the movable center of the journal end face. The blade positioning bracket is provided with a blade positioning surface W that can be positioned.

[0010] A section pin, which is detachably connected to the upper surface of the base plate and is located between the blade positioning bracket and the movable tip;

[0011] Two slats are mounted parallel to each other on the base plate, and the two slats are located on both sides of the line connecting the positioning center and the movable center on the journal end face. The surface of the slats includes a reference plane A and a reference plane B that are perpendicular to each other.

[0012] The back profile template and the basin profile template respectively include a comparison profile for blade profile detection, a sliding surface that mates with reference plane A, and a measurement surface that mates with reference plane B.

[0013] Furthermore, the journal end face positioning center also includes:

[0014] The support is fixed to the upper end face of the base plate and has a through hole.

[0015] A bushing, which is installed in a through hole of a support, has at least one section of internal thread on the inner surface of the bushing, and the center is placed in the inner hole of the bushing.

[0016] A plug, wherein the plug is installed in the inner hole of the bushing via an internal thread in the bushing;

[0017] The first spring is located in the inner hole of the bushing, with one end of the first spring in close contact with the plug and the other end in close contact with the tip;

[0018] A positioning plate is installed at the opening of a through hole on the support. The positioning plate has a center hole with a maximum diameter smaller than the maximum outer diameter of the center. The surface of the positioning plate has a positioning surface Q.

[0019] Furthermore, the blade positioning bracket also includes:

[0020] The bracket is installed on the upper surface of the base plate. The surface of the bracket has a sliding groove, and the top of the bracket has a threaded hole that communicates with the sliding groove. A fastening screw is installed in the threaded hole.

[0021] The positioning template is slidably connected in the sliding groove of the bracket, and the end of the positioning template is the blade positioning surface W. The positioning template has a slot.

[0022] A stud, which is fixed to the bottom of the sliding groove of the bracket and located inside the slot of the positioning template;

[0023] The second spring is placed in the slot of the positioning template, with one end connected to the stud and the other end in close contact with the inner wall of the slot.

[0024] Furthermore, there are multiple section pins, arranged in pairs between the blade positioning bracket and the movable tip, with each pair of section pins corresponding to a section to be tested.

[0025] Furthermore, the slats are cubic blocks that are mounted on the base plate with screws.

[0026] The method for inspecting the profile of a double-journal blade employs the aforementioned inspection device with a plug in the journal end face positioning center, and includes the following steps:

[0027] Step 1: Adjust the center of the journal end face positioning center and the center of the movable center to be on a straight line;

[0028] Step 2: Tighten the plug to hold the journal at one end of the double journal blade and make the end face of the journal fit tightly against the positioning surface Q of the positioning tip.

[0029] Step 3: The sliding movable tip initially presses against the journal at the other end of the double-journal blade to ensure that the blade body of the double-journal blade can rotate.

[0030] Step 4: Rotate the blade of the double-axis journal blade while moving the positioning template so that the positioning surface W of the blade is in contact with the positioning section of the blade of the double-axis journal blade. Then fix the position of the positioning template and move the movable tip again to fully press the double-axis journal blade.

[0031] Step 5: Place the back-facing template or the basin-facing template against the section pin and slide it along the reference plane A of the strip. Measure the gap between the comparison surface and the blade surface on the back-facing template or the basin-facing template, or measure the gap between the measuring surface on the back-facing template or the basin-facing template and the reference plane B.

[0032] Alternatively, in step one, the center of the journal end face positioning center and the center of the movable center are aligned in a straight line by using a standard round rod.

[0033] Compared with existing technologies, the positioning template in this invention differs from the fixed positioning template in existing blade profile inspection devices. The positioning template in this invention is flexibly movable along the blade positioning support, enabling the positioning of blade profiles with varying allowances. This avoids situations where the blade profile cannot be properly positioned, allowing the inspection device to be used at different stages of blade production. Before blade profile machining, the allowance and uniformity of the blade profile are inspected and grouped, identifying the blade's pre-machining state to improve machining quality and accuracy. This also reduces debugging time for subsequent finishing processes, increases machining efficiency, and ensures machining stability and safety. After blade profile machining, the contour shape and dimensions of the blade profile can be inspected. Attached Figure Description

[0034] Figure 1 This is a structural diagram of a device for detecting the profile of a double-nails blade;

[0035] Figure 2 yes Figure 1 Structural diagram of the center axis journal end face positioning center;

[0036] Figure 3 yes Figure 1 Structural diagram of the mid-blade positioning bracket;

[0037] Figure 4It is a structural drawing of the surface template;

[0038] In the diagram: 1. Base plate, 2. Journal end face positioning center, 3. Blade positioning bracket, 4. Round rod standard part, 5. Section pin, 6. Strip, 7. Movable center, 8. Plug, 9. Bushing, 10. Center, 11. First spring, 12. Support, 13. Positioning plate, 14. First screw, 15. Bracket, 16. Positioning template, 17. Stud, 18. Second spring, 19. Cover plate, 20. Second screw, 21. Fastening screw, 22. Back face template, 23. Basin face template. Detailed Implementation

[0039] The present invention will be further described below with reference to the accompanying drawings and specific embodiments. However, it should not be construed that the scope of the subject matter of the present invention is limited to the following embodiments. All modifications, substitutions and alterations made based on ordinary technical knowledge and conventional means in the art without departing from the above-described technical concept of the present invention are included within the scope of the present invention.

[0040] like Figures 1-4 This invention relates to a detection device for the profile of a double-journal blade, which mainly consists of a base plate 1, a journal end face positioning center 2, a blade positioning bracket 3, a round rod standard part 4, a section pin 5, a strip 6, and a movable center 7. Figure 4 The back profile template 22 and the basin profile template 23 are used together to complete the inspection of the blade profile.

[0041] In the detection device of the present invention, the journal end face positioning tip 2 and the movable tip 7 position the two journals of the blade. The journal end face positioning tip 2 is fixed on the base plate 1, and a plug 8 is threadedly connected. The internal tip 10 is connected to the plug 8 by a first spring 11. When the plug 8 is turned, the first spring 11 drives the tip 10 to move, which can complete the positioning of the end face of one journal of the blade and the center of the journal. The movable tip 7 moves flexibly in the groove of the base plate 1 to position the center of the journal at the other end of the blade. The blade body positioning bracket 3 positions the blade body. The blade body positioning bracket 3 has a positioning template 16, whose blade body positioning surface W has the same contour and size as the back surface of the blade body positioning section 1. The positioning template 16 is clearance-fitted with the bracket 15 fixed on the base plate 1 and is connected by a second spring 18. When the positioning template 16 moves to the blade body positioning surface W and is back-to-back with the blade body section 1, the positioning template 16 is fixed, thus completing the positioning of the blade body. When inspecting blade profiles, the blade is clamped in the inspection device. When inspecting a certain section of the blade profile (e.g., Figure 1When using cross sections 2 and 3 as shown, the back profile template 22 or the basin profile template 23 of the corresponding cross section is used to rest against the section pin 5 of the corresponding cross section of the detection device to detect the gap between the back profile template 22 or the basin profile template 23 and the blade or the gap with the strip 6, thus completing the detection of the blade profile.

[0042] In the double-journal blade profile inspection device, the journal end face positioning pin 2 is fixed on the base plate 1, and the journal end face positioning pin 2 is as follows: Figure 2 The blade positioning bracket 13 consists of a plug 8, a bushing 9, a center 10, a first spring 11, a support 12, a positioning plate 13, and a first screw 14. The support 12 is fixed to the base plate 1. The bushing 9 is interference-fitted with the support 12, and the center 10 is clearance-fitted with the bushing 9. The plug 8 is threaded to the bushing 9, and the plug 8 and the center 10 are connected by the first spring 11. The positioning plate 13 is fixed to the support 12 by the first screw 14. When the plug 8 is turned, the first spring 11 can move the center 10. The blade positioning bracket 3 and the section pin 5 are fixed on the section line of the blade that needs to be positioned and inspected. The blade positioning bracket 3 is as follows: Figure 3 It consists of a bracket 15, a positioning template 16, a stud 17, a second spring 18, a cover plate 19, a second screw 20, and a fastening screw 21. The bracket 15 has a sliding groove for the positioning template 16 to slide within it. The cover plate 19 is fixed to the sliding groove of the bracket 15 by the second screw 20, preventing the positioning template 16 from detaching from the bracket 15 while ensuring that the positioning template 16 can slide normally within the sliding groove. The stud 17 is fixed within the sliding groove of the bracket 15, and the positioning template 16 is connected to the stud 17 by the second spring 18 (e.g., ...). Figure 3 The positioning template 16 has a waist-shaped groove, and the stud 17 and the second spring 18 are set in the waist-shaped groove. It is in clearance fit with the sliding groove of the bracket 15. When the positioning template 16 moves to the required position, the fastening screw 21 is tightened to fix the positioning template 16. The strip 6 is fixed on both sides of the base plate 1. The movable tip 7 is in clearance fit with the base plate 1 through the sliding groove on the base plate 1 and can move in the sliding groove. During the manufacture of this device, a standard round rod 4 (i.e., a cylindrical rod) is used to adjust the centers of the journal end face positioning center 2 and the movable center 7 to be on the same straight line. When measuring the blade, the plug 8 is turned to hold one end of the journal against the blade and make the journal end face fit tightly against the positioning surface Q of the journal end face positioning center 2. The movable center 7 is slid to slightly hold the other end of the journal against the blade, allowing the blade body to rotate. While rotating the blade body, the positioning template 16 is moved so that its blade body positioning surface W fits against the blade body positioning section. The fastening screw 21 is then tightened to fix the positioning template 16. The movable center 7 is moved again to fully tighten the blade. When measuring the shape and size of the blade's back profile on section 2, the corresponding back profile template 22 (e.g., ...) is used. Figure 4 ) Surface 3 rests against the section pin 5 where section 2 is located, and surface 1 is attached to the reference A on the strip 6 (e.g. Figure 1 And slide, the detection surface 2 and the reference B on the strip 6 (such as...) Figure 1 The gap between the two surfaces or the gap between the inspection surface 4 and the blade profile is checked. The same procedure is applied to check the blade basin profile.

[0043] Contents not described in detail in this specification are prior art known to those skilled in the art. Although the present invention has been described above with reference to specific embodiments, it should be understood that the present invention is not limited to the scope of the specific embodiments. For those skilled in the art, any variations falling within the scope defined by the claims are protected by this invention.

Claims

1. A device for detecting the profile of a double-journey blade, characterized in that: include: Base plate (1); A journal end face positioning tip (2) is fixed on the upper end face of the base plate (1), and a tip (10) with a variable position is provided on the journal end face positioning tip (2). The movable tip (7) is slidably connected to the upper surface of the base plate (1); The blade positioning bracket (3) is detachably connected to the upper end face of the base plate (1) and is located between the line connecting the journal end face positioning tip (2) and the movable tip (7). The blade positioning bracket (3) is provided with a blade positioning surface W whose position can be changed. Section pin (5), the section pin (5) is detachably connected to the upper end face of the base plate (1) and is located between the line connecting the blade positioning bracket (3) and the movable tip (7); Two strips (6) are mounted in parallel on the base plate (1), and the two strips (6) are located on both sides of the line connecting the journal end face positioning center (2) and the movable center (7). The surface of the strip (6) includes a reference plane A and a reference plane B that are perpendicular to each other. Back-facing profile template (22) and basin-facing profile template (23), wherein the back-facing profile template (22) and the basin-facing profile template (23) respectively include a comparison profile for blade profile detection, a sliding surface that mates with reference plane A, and a measurement surface that mates with reference plane B; The journal end face positioning center (2) also includes: Support (12), the support (12) is fixed on the upper end face of the base plate (1), and the support (12) has a through hole; Bushing (9), the bushing (9) is installed in the through hole of the support (12), the inner surface of the bushing (9) has at least one section of internal thread, and the tip (10) is placed in the inner hole of the bushing (9); A plug (8) is installed in the inner hole of a bushing (9) via an internal thread in the bushing (9); The first spring (11) is located in the inner hole of the bushing (9), and one end of the first spring (11) is in close contact with the plug (8) and the other end is in close contact with the tip (10). Positioning plate (13), the positioning plate (13) is installed at the opening of the through hole on the support (12), the positioning plate (13) has a top hole, the maximum diameter of the top hole is smaller than the maximum outer diameter of the top (10), and the surface of the positioning plate (13) has a positioning surface Q. The blade positioning bracket (3) also includes: The bracket (15) is installed on the upper surface of the base plate (1). The surface of the bracket (15) has a sliding groove, and the top of the bracket (15) has a threaded hole that communicates with the sliding groove. A fastening screw (21) is installed in the threaded hole. Positioning template (16) is slidably connected in the sliding groove of the bracket (15). The end of the positioning template (16) is the blade positioning surface W. The positioning template (16) has a slot. Stud (17), the stud (17) is fixed to the bottom of the sliding groove of the bracket (15) and located in the slot of the positioning template (16); The second spring (18) is placed in the slot of the positioning template (16), with one end connected to the stud (17) and the other end in close contact with the inner wall of the slot.

2. The detection device for the profile of a double-journey blade according to claim 1, characterized in that: There are multiple section pins (5), and they are arranged in pairs between the blade positioning bracket (3) and the movable tip (7), with each pair of section pins (5) corresponding to a section to be tested.

3. The detection device for the profile of a double-journey blade according to claim 1, characterized in that: The slats (6) are cubic blocks and are mounted on the base plate (1) by screws.

4. A method for detecting the profile of a double-journey blade, characterized in that: The detection device described in claim 1 is used, and includes the following steps: Step 1: Adjust the center of the journal end face positioning center (2) and the center of the movable center (7) to be on a straight line; Step 2: Tighten the plug (8) to hold the journal at one end of the double journal blade and make the end face of the journal press against the positioning surface Q of the positioning tip (2) of the journal end face; Step 3: The sliding movable tip (7) initially presses against the journal at the other end of the double-journal blade to ensure that the blade body of the double-journal blade can rotate; Step 4: Rotate the blade of the double-axis journal blade and move the positioning template (16) to make the positioning surface W of the blade fit with the positioning section of the blade of the double-axis journal blade. Then fix the position of the positioning template (16) and move the movable tip (7) again to fully press the double-axis journal blade. Step 5: Place the back profile template (22) or the basin profile template (23) against the section pin (5) and slide it along the reference plane A of the strip (6). Measure the gap between the comparison surface and the blade surface on the back profile template (22) or the basin profile template (23), or measure the gap between the measuring surface on the back profile template (22) or the basin profile template (23) and the reference plane B.

5. The method for detecting the profile of a double-journey blade according to claim 4, characterized in that: In step one, the center of the journal end face positioning center (2) and the center of the movable center (7) are aligned on a straight line by using the round rod standard part (4).

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