Aircraft part polishing tool

Abstract

The utility model discloses an aircraft part polishing tool, which relates to the technical field of aircraft part processing, and comprises an operation table, the upper side of the operation table is fixedly connected with a mounting cover, the exterior of the mounting cover is fixedly connected with a first motor, one side of the first motor is fixedly connected with a rotating column, and the rotating column is rotatably connected to the interior of the mounting cover; a fixing cylinder is fixedly connected to the tail end of the rotating column, multiple sets of external expansion mechanisms which are arranged at equal intervals and installed in a staggered mode are installed on the inner side of the fixing cylinder, an adjusting and positioning mechanism is installed in the fixing cylinder, and an electric push rod is fixedly connected to the upper side of the installation cover; the device is driven by a single motor to synchronously control all the external expansion plates to achieve radial adjustment and self-locking clamping, pipeline parts of different sizes can be rapidly adapted and clamped, and it can be guaranteed that clamping force is evenly distributed; and deformation of the thin-wall pipeline part caused by non-uniform local pressure in the polishing process is effectively prevented.

Description

Technical Field

[0001] This utility model relates to the field of aircraft parts processing technology, and more specifically, to a grinding fixture for aircraft parts. Background Technology

[0002] In the aerospace manufacturing field, tubular aircraft parts such as hydraulic pipes and fuel pipes are widely used due to their specific fluid transmission functions. These parts are typically made of lightweight alloys and are characterized by thin walls and hollow structures. The quality of their outer surface has a significant impact on connection sealing and fluid resistance, thus often requiring precision grinding. Currently, general-purpose fixtures often struggle to effectively accommodate different pipe diameters, lack sufficient clamping stability, and are prone to part displacement or surface scratches during grinding, making it difficult to meet the high-precision and high-efficiency machining requirements of aerospace parts.

[0003] Existing technologies face significant challenges in grinding such thin-walled pipe parts. First, the parts are thin-walled and come in various sizes, making it difficult for traditional fixtures to provide sufficient clamping force while preventing excessive local pressure from causing the parts to collapse and deform, especially during rotary grinding. Second, to accommodate different pipe diameters, frequent fixture changes or cumbersome adjustments are usually required, severely impacting efficiency. Furthermore, during rotary grinding, uneven clamping force distribution can easily cause part vibration or eccentric rotation, not only reducing grinding quality but also potentially damaging the parts. Therefore, to address the above technical problems, a grinding fixture for aircraft parts is proposed here. Utility Model Content

[0004] The purpose of this utility model is to provide a grinding fixture for aircraft parts. By using a single motor to drive and synchronously control all the outer expansion plates, radial adjustment and self-locking clamping can be achieved. This fixture can not only quickly adapt to and clamp pipe parts of different sizes, but also ensure that the clamping force is evenly distributed, effectively preventing deformation of thin-walled pipe parts caused by uneven local pressure during the grinding process.

[0005] This utility model is achieved through the following technical solution:

[0006] A grinding fixture for aircraft parts includes an operating table. A mounting cover is fixedly connected to the upper side of the operating table. A first motor is fixedly connected to the outside of the mounting cover. A rotating column is fixedly connected to one side of the first motor and is rotatably connected to the inside of the mounting cover. A fixed cylinder is fixedly connected to the end of the rotating column. Multiple sets of equally spaced and staggered outward expansion mechanisms are installed inside the fixed cylinder. An adjustment and positioning mechanism is installed inside the fixed cylinder. An electric push rod is fixedly connected to the upper side of the mounting cover. A grinding disc is fixedly connected to the end of the output shaft of the electric push rod and is located directly above the fixed cylinder.

[0007] Preferably, the fixing cylinder is a hollow structure with a square groove inside.

[0008] Preferably, the expansion mechanism includes an opening, a sliding plate, an expansion plate, and a toothed plate. The opening is located outside the fixed cylinder, and there are several groups of openings. The openings are arranged at equal intervals in the transverse direction and are centrally symmetrically installed in the longitudinal direction.

[0009] Preferably, the slide plate passes through the inner side of the opening and is slidably connected to the inside of the fixed cylinder. A limiting groove is provided on the inner side of the fixed cylinder. A locking block is fixedly connected to one side of the slide plate, and the locking block is slidably connected to the inner side of the limiting groove.

[0010] Preferably, the outer expansion plate is fixedly connected to the end of the slide plate, and the toothed plate is fixedly connected to the other side of the slide plate.

[0011] Preferably, the adjusting and positioning mechanism includes a rotating rod and a gear. The rotating rod is rotatably connected to the inner side of the fixed cylinder, and the gear is fixedly connected to the outer side of the rotating rod, and the gear meshes with all of the toothed plates.

[0012] Preferably, a second motor is fixedly connected to the end of the fixed cylinder, and the rotating rod is fixedly connected to the second motor.

[0013] The technical solution of this utility model has at least the following beneficial effects:

[0014] This utility model proposes a grinding fixture for aircraft parts. Through a single drive, all expansion plates are synchronously controlled to expand outwards uniformly, directly fitting the inner walls of pipes of different sizes, achieving rapid adaptive clamping. The gear and toothed plate meshing structure automatically locks the position after the drive stops, ensuring a stable and secure clamping without loosening. The expansion plates move smoothly under the limit guide, so that the clamping force is evenly distributed along the circumference of the inner wall of the pipe, completely avoiding the crushing and deformation of thin-walled parts caused by local compression of traditional fixtures. At the same time, no parts need to be replaced during the clamping process, significantly shortening the preparation time. During grinding, the part rotates as a whole with the fixed cylinder, and the top grinding disc presses down stably, with uniform force and no eccentric vibration, ensuring the grinding accuracy and surface consistency of the outer wall. It is particularly suitable for the high-standard processing requirements of thin-walled pipes in aviation. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0016] Figure 2 This is a schematic diagram of the second overall structure of the present invention;

[0017] Figure 3 for Figure 2 Enlarged view of A in the middle;

[0018] Figure 4 for Figure 2Enlarged view of B in the middle;

[0019] Figure 5 This is a partial structural side view of the present invention;

[0020] Figure 6 This is a partial structural side sectional view of the present invention;

[0021] Figure 7 for Figure 6 Enlarged view of C;

[0022] Figure 8 for Figure 6 Enlarged view of D;

[0023] Reference numerals in the attached diagram: 1. Operating platform; 2. Mounting cover; 3. First motor; 4. Rotating column; 5. Fixed cylinder; 6. Opening; 7. Slide plate; 8. Limiting groove; 9. Locking block; 10. Outer expansion plate; 11. Toothed plate; 12. Second motor; 13. Rotating rod; 14. Gear; 15. Electric push rod; 16. Grinding disc. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0025] Please see Figures 1-8 This utility model proposes a grinding fixture for aircraft parts, comprising an operating table 1, which serves as the supporting base for the entire device. A mounting cover 2 is fixedly connected to the upper side of the operating table 1, serving to house and protect the internal transmission components. A first motor 3 is fixedly connected to the outside of the mounting cover 2, acting as the main power source. A rotating column 4 is fixedly connected to one side of the first motor 3, transmitting rotational power. The rotating column 4 is rotatably connected to the inside of the mounting cover 2, ensuring stability during rotation. A fixed cylinder 5 is fixedly connected to the end of the rotating column 4, serving as the core clamping component. The fixed cylinder 5 is a hollow structure with a square groove inside, facilitating the arrangement and movement of the internal mechanisms.

[0026] Multiple sets of equally spaced and staggered expansion mechanisms are installed on the inner side of the fixed cylinder 5. The expansion mechanisms are used to achieve adaptive clamping of workpieces of different sizes. The expansion mechanism includes an opening 6, a sliding plate 7, an expansion plate 10, and a toothed plate 11. The opening 6 is opened on the outside of the fixed cylinder 5 for the extension and retraction of the sliding plate 7. There are several sets of openings 6. The openings 6 are equally spaced in the transverse direction to ensure uniform force distribution. The openings 6 are also centrally symmetrically installed in the longitudinal direction to maintain balance.

[0027] The slide plate 7 passes through the inner side of the opening 6 and is slidably connected to the inside of the fixed cylinder 5, enabling radial movement. A limiting groove 8 is provided on the inner side of the fixed cylinder 5 to constrain the movement trajectory of the slide plate 7. A locking block 9 is fixedly connected to one side of the slide plate 7, and the locking block 9 is slidably connected to the inner side of the limiting groove 8 to ensure the accuracy and stability of the movement of the slide plate 7.

[0028] The expansion plate 10 is fixedly connected to the end of the slide plate 7, directly contacting the inner wall of the workpiece for clamping. The toothed plate 11 is fixedly connected to the other side of the slide plate 7, used to transmit driving force. An adjustment and positioning mechanism is installed inside the fixed cylinder 5, used to synchronously control the movement of all expansion mechanisms. The adjustment and positioning mechanism includes a rotating rod 13 and a gear 14. The rotating rod 13 is rotatably connected to the inner side of the fixed cylinder 5, serving as a power transmission shaft. The gear 14 is fixedly connected to the outside of the rotating rod 13, and meshes with all the toothed plates 11 to achieve synchronous drive. A second motor 12 is fixedly connected to the end of the fixed cylinder 5, and the rotating rod 13 is fixedly connected to the second motor 12, which provides power to the adjustment and positioning mechanism.

[0029] An electric push rod 15 is fixedly connected to the upper side of the mounting cover 2. The electric push rod 15 is used to control the lifting and lowering of the grinding disc 16. The grinding disc 16 is fixedly connected to the end of the output shaft of the electric push rod 15. The grinding disc 16 acts as an actuating component to grind the workpiece. The grinding disc 16 is located directly above the fixed cylinder 5 to ensure the accuracy of the processing position.

[0030] The working principle of an aircraft part grinding fixture based on an embodiment is as follows: When processing a pipe-type aircraft part, the pipe part to be processed is first placed on the outside of the fixed cylinder 5, and its position is adjusted to ensure that the area to be ground is directly below the grinding disc 16. Then, the second motor 12 is started, driving the rotating rod 13 and its gear 14 to rotate. Since the gear 14 meshes with all the toothed plates 11, the rotation of the gear 14 will drive all the sliding plates 7 to slide outward synchronously and smoothly along the lateral side of the fixed cylinder 5 under the limiting guidance of the limiting groove 8 and the locking block 9. The movement of the sliding plates 7 causes the outer expansion plate 10 at its end to expand outward, thereby tightly abutting against the inner wall of the pipe part, achieving reliable clamping. At this time, the second motor 12 is stopped, and the meshing relationship between the gear 14 and the toothed plates 11 is... It can automatically lock the position to provide a stable installation. Then, the electric push rod 15 is activated to drive the grinding disc 16 at the end of its output shaft to move downward until it contacts the outer wall of the pipe part. At the same time, the first motor 3 is activated to drive the rotating column 4 to rotate, which in turn drives the fixed cylinder 5, the clamped pipe part, and the internal adjustment and positioning mechanism to rotate together. Under the continuous contact and friction between the grinding disc 16 and the outer wall of the rotating pipe part, efficient and uniform outer wall grinding can be completed. Through a single second motor 12 driving the gear 14, all the outer expansion plates 10 are synchronously controlled to achieve radial adjustment and self-locking clamping. It can not only quickly adapt to and clamp pipe parts of different sizes, but also ensure that the clamping force is evenly distributed, effectively preventing deformation of thin-walled pipe parts caused by uneven local pressure during the grinding process.

[0031] Furthermore, the sparks generated during the cutting process can be blocked by the surrounding plate 18 around the edge of the operating table 1. The debris blocked can fall directly into the collection box 20 below through the cutting groove 2. The waste accumulated in the collection box 20 can be discharged through the detachable discharge plate 21 at the bottom. The entire device achieves closed-loop control of clamping, feeding, cutting and resetting through mechanical linkage. Combined with the enclosure structure, elastic reset and waste collection system, it improves cutting accuracy while comprehensively ensuring the safety of operators and the cleanliness of the working environment.

[0032] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A grinding fixture for aircraft parts, characterized in that: The device includes an operating table (1), with a mounting cover (2) fixedly connected to the upper side of the operating table (1). A first motor (3) is fixedly connected to the outside of the mounting cover (2). A rotating column (4) is fixedly connected to one side of the first motor (3), and the rotating column (4) is rotatably connected to the inside of the mounting cover (2). A fixed cylinder (5) is fixedly connected to the end of the rotating column (4). Multiple sets of equally spaced and staggered expansion mechanisms are installed on the inside of the fixed cylinder (5). An adjustment and positioning mechanism is installed inside the fixed cylinder (5). An electric push rod (15) is fixedly connected to the upper side of the mounting cover (2). A grinding disc (16) is fixedly connected to the end of the output shaft of the electric push rod (15), and the grinding disc (16) is located directly above the fixed cylinder (5).

2. The aircraft parts grinding fixture according to claim 1, characterized in that: The fixed cylinder (5) is a hollow structure with a square groove inside.

3. The aircraft parts grinding fixture according to claim 1, characterized in that: The expansion mechanism includes an opening (6), a sliding plate (7), an expansion plate (10), and a toothed plate (11). The opening (6) is located outside the fixed cylinder (5), and there are several groups of openings (6). The openings (6) are arranged at equal intervals in the transverse direction, and the openings (6) are centrally symmetrically installed in the longitudinal direction.

4. The aircraft parts grinding fixture according to claim 3, characterized in that: The slide plate (7) passes through the inner side of the opening (6) and is slidably connected to the inside of the fixed cylinder (5). The inner side of the fixed cylinder (5) is provided with a limiting groove (8). A locking block (9) is fixedly connected to one side of the slide plate (7), and the locking block (9) is slidably connected to the inner side of the limiting groove (8).

5. The aircraft parts grinding fixture according to claim 4, characterized in that: The expansion plate (10) is fixedly connected to the end of the slide plate (7), and the toothed plate (11) is fixedly connected to the other side of the slide plate (7).

6. The aircraft parts grinding fixture according to claim 5, characterized in that: The adjustment and positioning mechanism includes a rotating rod (13) and a gear (14). The rotating rod (13) is rotatably connected to the inside of the fixed cylinder (5), and the gear (14) is fixedly connected to the outside of the rotating rod (13). The gear (14) meshes with all the toothed plates (11).

7. The aircraft parts grinding fixture according to claim 6, characterized in that: The end of the fixed cylinder (5) is fixedly connected to the second motor (12), and the rotating rod (13) is fixedly connected to the second motor (12).

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