Engine blade profile three-dimensional scanner positioning fixture

Abstract

The utility model discloses an engine blade appearance three-dimensional scanner positioning fixture, including installation rod, the middle part of installation rod back wall is provided with the installation slot, the inside middle part of installation slot is rotatably connected with two -way screw rod, and the left and right sides of two -way screw rod periphery all are threadedly connected with the screw block, and the middle part of screw block back side wall all is fixedly connected with the connecting rod. This kind of engine blade appearance three-dimensional scanner positioning fixture, through the fixture adopts the curved clamping plate design of matching with the blade main part, avoids the problem that traditional rigid fixture contact area is small, and partial stress is easy to produce, and the clamping rod can slide along the limiting hole of the mounting block, and the spring structure between the connecting plate and the mounting block is matched, so that the clamping plate has the buffer margin when clamping the blade, can provide enough clamping force to prevent the blade displacement, can also avoid the blade deformation caused by excessive clamping, and the sliding cooperation of the positioning plate and the limiting groove further restricts the motion track of the clamping rod, ensures that the clamping plate exerts force stably, and provides the guarantee for the authenticity of scanning data.

Description

Technical Field

[0001] This utility model relates to the field of three-dimensional scanning positioning fixture technology, specifically a positioning fixture for a three-dimensional scanner of engine blade morphology. Background Technology

[0002] Engine blades are mostly complex three-dimensional free-form surface structures with continuous twisted shapes from the blade root to the blade tip. Some also have special structures such as internal cooling channels. Traditional blade measurement relies on standard sample distance measurement and manual mapping, which have problems such as low efficiency and large errors. They can no longer meet the needs of modern engine manufacturing. The emergence of three-dimensional scanning technology has reduced the detection time from several hours to minutes and greatly improved the data acquisition density, making it the mainstream method for blade morphology measurement.

[0003] In the prior art, when using a 3D scanner to scan the morphology of engine blades, a positioning fixture is required to fix the engine blades. Since the blades are thin-walled complex curved structures, deformation is likely to occur during positioning, resulting in inaccurate 3D scanning results. Therefore, a positioning fixture for a 3D scanner of engine blade morphology is needed. Utility Model Content

[0004] To solve the above-mentioned technical problems, this utility model provides the following technical solution:

[0005] This utility model discloses a positioning fixture for a three-dimensional scanner of engine blade morphology, including a base, and a flexible fixing mechanism is provided on the top of the base;

[0006] The flexible fixing mechanism includes a mounting rod, a mounting groove in the middle of the rear wall of the mounting rod, a bidirectional screw rotatably connected to the middle of the inner side of the mounting groove, threaded blocks threaded to both the left and right sides of the outer periphery of the bidirectional screw, a connecting rod fixedly connected to the middle of the rear side wall of each threaded block, a mounting block fixedly connected to the rear end of each connecting rod, a limit hole in the middle of each mounting block, a clamping rod slidably connected through the inner side of each limit hole, a second clamping plate fixedly connected to the right end of the left clamping rod, a first clamping plate fixedly connected to the left end of the right clamping rod, connecting plates fixedly connected to the ends of the two sets of clamping rods that are far apart, and springs fixedly connected to the outer periphery of the side walls of the two sets of connecting plates that are close to each other.

[0007] As a preferred technical solution of this utility model, a blade body is provided between the first clamping plate and the second clamping plate, and both the first clamping plate and the second clamping plate are in contact with the surface of the blade body.

[0008] In a preferred embodiment of this invention, the other end of each spring is fixedly connected to the outer wall of the mounting block, and the clamping rods are located inside the spring.

[0009] As a preferred embodiment of this utility model, a drive motor is fixedly connected to the middle of the left side wall of the outer side of the mounting rod, and the output end of the drive motor is fixedly connected to the bidirectional screw.

[0010] As a preferred technical solution of this utility model, the threaded blocks are slidably connected to the left and right sides of the inner side of the mounting groove, and the threaded blocks are all in clearance fit with the mounting groove.

[0011] As a preferred embodiment of this utility model, support rods are fixedly connected to both the left and right sides of the middle of the bottom wall of the mounting rod, and the support rods are respectively fixedly connected to the left and right sides of the middle of the top wall of the base.

[0012] As a preferred embodiment of this utility model, the first clamping plate, the second clamping plate, and the blade body are all curved, and positioning plates are fixedly connected to both the upper and lower ends of the connecting plate.

[0013] As a preferred technical solution of this utility model, the positioning plates are all slidably connected to the inner side of the limiting groove, and the limiting groove is respectively set in the middle of the upper and lower walls of the mounting block.

[0014] The beneficial effects of this utility model are:

[0015] 1. This type of engine blade morphology 3D scanner positioning fixture adopts a curved clamping plate design that matches the blade body, which can closely fit the blade surface, avoiding the problems of small contact area and easy local stress generation of traditional rigid fixtures. The clamping rod can slide along the limiting hole of the mounting block. With the spring structure between the connecting plate and the mounting block, the clamping plate has a buffer margin when clamping the blade. It can provide sufficient clamping force to prevent blade displacement, and avoid excessive clamping that causes blade deformation. The sliding cooperation between the positioning plate and the limiting groove further restricts the movement trajectory of the clamping rod, ensuring stable force application of the clamping plate and providing a guarantee for the authenticity of the scanned data.

[0016] 2. This type of engine blade morphology 3D scanner positioning fixture, driven by a motor to rotate a bidirectional screw, allows the threaded blocks on both sides to slide synchronously in opposite directions along the mounting groove. The clamping plates are precisely adjusted via connecting rods and mounting blocks, eliminating the need for manual operation and reducing operational difficulty. The elasticity of the springs allows for flexible adjustment of the clamping range, and combined with the wide range of adjustment of the bidirectional screw, it can adapt to the fixing requirements of engine blades with different curvatures and sizes. The entire flexible fixing mechanism is stably mounted on the base via support rods, ensuring a stable structure and preventing shaking during adjustment, thus improving operational safety and equipment versatility. Attached Figure Description

[0017] The accompanying drawings are provided to further illustrate the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention, but do not constitute a limitation thereof. In the drawings:

[0018] Figure 1 This is a top view schematic diagram of the overall structure of a three-dimensional scanner positioning fixture for engine blade morphology according to this utility model;

[0019] Figure 2 This is a side view of the overall structure of a three-dimensional scanner positioning fixture for engine blade morphology according to this utility model;

[0020] Figure 3 This is a side view schematic diagram of the clamping structure of a positioning fixture for a three-dimensional scanner of engine blade morphology according to this utility model;

[0021] Figure 4 This is a front view schematic diagram of the clamping structure of a positioning fixture for a three-dimensional scanner of engine blade morphology according to this utility model;

[0022] Figure 5 This is a schematic diagram of the buffer structure of a positioning fixture for a three-dimensional scanner of engine blade morphology according to this utility model.

[0023] In the diagram: 1. Base; 2. Flexible fixing mechanism; 3. Support rod; 4. Mounting rod; 5. Drive motor; 6. Mounting groove; 7. Bidirectional screw; 8. Threaded block; 9. Connecting rod; 10. Mounting block; 11. Clamping rod; 12. First clamping plate; 13. Second clamping plate; 14. Connecting plate; 15. Limiting hole; 16. Spring; 17. Limiting groove; 18. Positioning plate; 19. Blade body. Detailed Implementation

[0024] The preferred embodiments of the present invention will be described below with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are for illustration and explanation only and are not intended to limit the present invention.

[0025] Example: Figures 1-5 As shown, the present invention provides a positioning fixture for a three-dimensional scanner of engine blade morphology, including a base 1, and a flexible fixing mechanism 2 is provided on the top of the base 1.

[0026] The flexible fixing mechanism 2 includes a mounting rod 4. A mounting groove 6 is provided in the middle of the rear wall of the mounting rod 4. A bidirectional screw 7 is rotatably connected to the middle of the inner side of the mounting groove 6. During rotation, the bidirectional screw 7 can drive the threaded blocks 8 on both sides to move closer or further apart. Threaded blocks 8 are threadedly connected to both sides of the outer periphery of the bidirectional screw 7. A connecting rod 9 is fixedly connected to the middle of the rear side wall of each threaded block 8. A mounting block 10 is fixedly connected to the rear end of each connecting rod 9. During movement, the threaded blocks 8 can drive the connecting rod 9 and the rear mounting block 10 to move synchronously. The mounting blocks 10 have a central section... A limiting hole 15 is provided, and a clamping rod 11 is slidably connected through and inside the limiting hole 15. The clamping rod 11 can move left and right inside the limiting hole 15, thereby stretching or compressing the spring 16. The right end of the left clamping rod 11 is fixedly connected to a second clamping plate 13, and the left end of the right clamping rod 11 is fixedly connected to a first clamping plate 12. The ends of the two sets of clamping rods 11 that are far apart are fixedly connected to a connecting plate 14. The outer periphery of the side wall of the two sets of connecting plates 14 that are close to each other is fixedly connected to a spring 16. The spring 16 can prevent the clamping rod 11 from clamping the blade hard and causing blade deformation.

[0027] A blade body 19 is provided between the first clamping plate 12 and the second clamping plate 13. The first clamping plate 12 and the second clamping plate 13 are both in contact with the surface of the blade body 19. The other end of the spring 16 is fixedly connected to the outer wall of the mounting block 10. The clamping rods 11 are all located inside the spring 16. The first clamping plate 12 and the second clamping plate 13 cooperate to clamp and fix the blade body 19.

[0028] A drive motor 5 is fixedly connected to the middle of the left side of the outer side of the mounting rod 4. The output end of the drive motor 5 is fixedly connected to the bidirectional screw 7. The threaded blocks 8 are slidably connected to the left and right sides of the inner side of the mounting groove 6. The threaded blocks 8 are in clearance fit with the mounting groove 6. The threaded blocks 8 can move towards each other or away from each other inside the mounting groove 6.

[0029] Support rods 3 are fixedly connected to the left and right sides of the bottom wall of mounting rod 4. Support rods 3 are fixedly connected to the left and right sides of the top wall of base 1. The first clamping plate 12, the second clamping plate 13 and the blade body 19 are all curved. Positioning plates 18 are fixedly connected to the upper and lower ends of connecting plate 14. Positioning plates 18 are slidably connected to the inside of limiting grooves 17. Limiting grooves 17 are respectively set in the middle of the upper and lower walls of mounting block 10. Limiting grooves 17 can limit positioning plates 18, thereby limiting clamping rod 11, first clamping plate 12 and second clamping plate 13, ensuring that clamping plates can play a role in clamping and fixing blade body 19.

[0030] Working principle: When scanning the blade, the drive motor 5 on the mounting rod 4 is started first. The motor drives the bidirectional screw 7 in the mounting groove 6 to rotate. Since the left and right threads of the bidirectional screw 7 rotate in opposite directions, the two sets of threaded blocks 8 that cooperate with it move synchronously in opposite directions along the mounting groove 6. Through the connecting rod 9, the curved clamping plates at the ends of the mounting block 10 and the clamping rod 11 move closer to each other, realizing the coarse adjustment of the blade placement space. When the first clamping plate 12 and the second clamping plate 13 contact the surface of the curved blade, the clamping rod 11 slides outward along the limiting hole 15 of the mounting block 10 and compresses the spring 16. The elastic reaction force of the spring 16 pushes the clamping plates on both sides to fit tightly against the curved surface of the blade, which not only ensures the stability of the clamping but also avoids the deformation of the blade. At the same time, the positioning plate 18 on the connecting plate 14 slides along the limiting groove 17 of the mounting block 10 to limit the offset of the clamping rod 11 to ensure accurate positioning.

[0031] Finally, it should be noted that in the description of this utility model, the terms "vertical," "upper," "lower," "horizontal," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0032] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; 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; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0033] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A positioning fixture for a three-dimensional scanner of engine blade morphology, comprising a base (1), characterized in that: The base (1) is provided with a flexible fixing mechanism (2) at its top; The flexible fixing mechanism (2) includes a mounting rod (4), a mounting groove (6) is provided in the middle of the rear wall of the mounting rod (4), a bidirectional screw (7) is rotatably connected to the middle of the inner side of the mounting groove (6), threaded blocks (8) are threadedly connected to the left and right sides of the outer periphery of the bidirectional screw (7), a connecting rod (9) is fixedly connected to the middle of the rear side wall of the threaded block (8), a mounting block (10) is fixedly connected to the rear end of the connecting rod (9), a limiting hole (15) is provided in the middle of the mounting block (10), a clamping rod (11) is slidably connected through the inner side of the limiting hole (15), a second clamping plate (13) is fixedly connected to the right end of the left clamping rod (11), a first clamping plate (12) is fixedly connected to the left end of the right clamping rod (11), a connecting plate (14) is fixedly connected to the opposite end of the two sets of clamping rods (11), and a spring (16) is fixedly connected to the outer periphery of the side wall of the two sets of connecting plates (14) that are close to each other.

2. The positioning fixture for a three-dimensional scanner of engine blade morphology according to claim 1, characterized in that, A blade body (19) is provided between the first clamping plate (12) and the second clamping plate (13), and both the first clamping plate (12) and the second clamping plate (13) are in contact with the surface of the blade body (19).

3. The positioning fixture for a three-dimensional scanner of engine blade morphology according to claim 1, characterized in that, The other end of each spring (16) is fixedly connected to the outer wall of the mounting block (10), and the clamping rods (11) are all located inside the spring (16).

4. The positioning fixture for a three-dimensional scanner of engine blade morphology according to claim 1, characterized in that, A drive motor (5) is fixedly connected to the middle of the left side of the outer side of the mounting rod (4), and the output end of the drive motor (5) is fixedly connected to the bidirectional screw (7).

5. The positioning fixture for a three-dimensional scanner of engine blade morphology according to claim 1, characterized in that, The threaded blocks (8) are slidably connected to the left and right sides of the inner side of the mounting groove (6), and the threaded blocks (8) are in clearance fit with the mounting groove (6).

6. The positioning fixture for a three-dimensional scanner of engine blade morphology according to claim 1, characterized in that, The mounting rod (4) has support rods (3) fixedly connected to the left and right sides of the bottom wall, and the support rods (3) are fixedly connected to the left and right sides of the top wall of the base (1).

7. The positioning fixture for a three-dimensional scanner of engine blade morphology according to claim 1, characterized in that, The first clamping plate (12), the second clamping plate (13) and the blade body (19) are all curved, and the upper and lower ends of the connecting plate (14) are fixedly connected with positioning plates (18).

8. The positioning fixture for a three-dimensional scanner of engine blade morphology according to claim 7, characterized in that, The positioning plates (18) are all slidably connected to the inside of the limiting grooves (17), and the limiting grooves (17) are respectively set in the middle of the upper and lower walls of the mounting block (10).

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