Positioning clamp for thin-wall joint of aero-engine

Abstract

The utility model relates to a positioning fixture for a thin-wall joint of an aero-engine, which comprises a base and a supporting seat, the supporting seat is positioned above the base, a supporting arm is connected between the supporting seat and the base, a linear groove and an arc-shaped track groove are arranged on the supporting seat, and positioning supporting columns are arranged in the linear groove and the track groove. A positioning plate is arranged on the positioning supporting column, a clamping plate is arranged on the positioning plate, and the positioning plate is connected with a hanging shaft. Compared with the prior art, the thin-wall connector positioning device has the advantages that when a thin-wall connector is positioned, the clamping plate is in butt joint with the thin-wall connector, the protruding part of the thin-wall connector can be placed on the positioning plate, then the suction cup assembly is sucked to the thin-wall connector through downward movement of the drawing arm, and at the moment, the pressing plate exerts downward acting force on the hanging shaft; the position of the positioning plate is locked, at the moment, the thin-wall connector cannot rotate and move or cannot vertically move, meanwhile, no covering object is arranged on the upper surface of the thin-wall connector, and surface machining can be conveniently conducted on the thin-wall connector.

Description

Technical Field

[0001] This utility model belongs to the field of clamps, specifically relating to a clamp for positioning thin-walled joints of aero engines. Background Technology

[0002] The lower left connector is one of the more important connecting parts of a certain type of aero-engine. The part is about 400mm long and the wall thickness of the machined surface is only 2mm. It is a thin-walled part with a complex and irregular shape. Its machined surface is a multi-angle surface in space. The machined part is within 40mm to 65mm from the edge of the entire outline of the part, and the dimensional accuracy requirements are high.

[0003] When using a general-purpose fixture to position the part, it is difficult to clamp the edge position because the part is not a flat plate. Even if the edge position can be clamped without changing the shape of the part, the chuck will cover the edge of the part, affecting the processing of that position. Utility Model Content

[0004] The purpose of this invention is to provide a positioning fixture that can position and clamp thin-walled joints of aero engines without affecting the processing of their edge positions.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is a positioning fixture for a thin-walled connector of an aero-engine, comprising a base and a support base. The support base is located above the base, and a support arm is connected between the support base and the base. The support base is provided with a straight groove and an arc-shaped trajectory groove. Positioning support columns are provided in both the straight groove and the trajectory groove. Positioning plates are provided on the positioning support columns, and locking plates are provided on the positioning plates. The locking plates are connected to the thin-walled connector. A lifting shaft is connected to the positioning plate. The lifting shaft passes through the positioning support column and the support base and is connected to a pressure plate. The pressure plate is located between the support base and the base, and a pull-out arm passes through the pressure plate. A suction cup assembly located above the support base is connected to the pull-out arm. The pull-out arm controls the suction cup assembly to adsorb the thin-walled connector, and at the same time, the pressure plate applies a downward force to the lifting shaft, thereby locking the position of the positioning plate.

[0006] Furthermore, the upper surface of the positioning plate is provided with a locking groove, and the positioning plate is axially connected to a flat extension arm. The flat extension arm is connected to the upper end of the lifting shaft, and the positioning plate moves around the lifting shaft after the flat extension arm is controlled.

[0007] Furthermore, a tensioning ring is provided below the positioning plate. The tensioning ring is fixed to the upper end face of the positioning support column. When the lifting shaft applies a downward force to the positioning plate, the positioning plate presses on the tensioning ring.

[0008] Furthermore, the lifting shaft passes through the pressure plate, and a tray is fixed to the lower end of the lifting shaft, with the tray located below the pressure plate.

[0009] Furthermore, the lower end of the pull-out arm is connected to a power telescopic rod, which is mounted on the base. When the power telescopic rod extends or retracts, it drives the pull-out arm to move vertically. The upper end of the pull-out arm is connected to the suction cup assembly.

[0010] Furthermore, a cover plate is fixed on the pull-out arm, the cover plate is located above the pressure plate, and a compression return spring is sleeved on the pull-out arm, the compression return spring is located between the cover plate and the pressure plate.

[0011] Furthermore, the suction cup assembly includes a base tube fixed to the support base, an outer sleeve screwed onto the base tube, a disc cover fixed to the upper end of the outer sleeve, and the upper end of the pull-out arm extending into the base tube and fixed with a rubber plug.

[0012] Furthermore, a pressure plate is provided on the positioning support column, and a vertical through threaded hole is provided on the pressure plate, with a locking bolt screwed into the threaded hole.

[0013] Compared with the prior art, the beneficial effects of this utility model are as follows: When positioning the thin-walled joint, the locking plate is mated on the thin-walled joint, or the protruding part of the thin-walled joint is placed on the positioning plate. Then, the suction cup assembly is attached to the thin-walled joint by moving the pull arm downward. At this time, the pressure plate applies a downward force to the hanging shaft, locking the position of the positioning plate. At this time, the thin-walled joint cannot rotate or move vertically. At the same time, there are no covering objects on its upper surface, which facilitates surface processing. Attached Figure Description

[0014] Figure 1 This is a top view of the connection between the thin-walled joint and the positioning support column of this utility model;

[0015] Figure 2 This is a front view schematic diagram of the positioning state of the thin-walled joint of the thin-walled structure of this utility model;

[0016] Figure 3 This is a schematic diagram showing the connection between the suction cup assembly and the support base of this utility model;

[0017] Figure 4 This is a schematic diagram of the pressure plate structure of this utility model;

[0018] Figure 5 This is a schematic diagram showing the connection between the positioning plate and the positioning support column of this utility model;

[0019] Figure 6 This is a schematic diagram showing the connection between the positioning plate and the flat extension arm of this utility model;

[0020] Among them, 1-base, 2-support seat, 3-straight groove, 4-positioning support column, 5-track groove, 6-positioning plate, 7-positioning plate, 8-strip opening, 9-hanging shaft, 10-positioning groove, 11-bottom cylinder, 12-external thread, 13-outer sleeve, 14-disc cover, 15-pull-out arm, 16-power telescopic rod, 17-pressure plate, 18-support arm, 19-round hole, 20-long straight notch, 21-track notch, 22-tray, 23-covering plate, 24-compression return spring, 25-tensioning ring, 26-flat extension arm, 27-connecting plate, 28-anti-detachment cap, 29-pressure plate, 30-locking bolt. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. It should be understood that the preferred embodiments described herein are only for illustration and explanation of the present utility model and are not intended to limit the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. The components of the embodiments of the present utility model described and shown in the accompanying drawings can be arranged and designed in various different configurations. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the protection scope of the present utility model. In the embodiments, the components of the embodiments of the present application described and shown in the accompanying drawings can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present application provided in the accompanying drawings is not intended to limit the scope of the claimed application, but merely represents selected embodiments of the present application.

[0022] See Figures 1 to 6 As shown, a positioning fixture for a thin-walled joint of an aero-engine includes a base 1 and a support 2. The support 2 is provided with a straight groove 3, and two positioning support columns 4 are installed in the straight groove 3. The support 2 is also provided with an arc-shaped track groove 5, and three positioning support columns 4 are installed in the track groove 5. A positioning plate 6 is installed on the top surface of each positioning support column 4. The protruding part of the thin-walled joint can be clamped on the positioning plate 6. When the protruding part of the thin-walled joint is small, a locking plate 7 can be welded to the thin-walled joint, and then the locking plate 7 is clamped on the positioning plate 6. Then the position of the positioning plate 6 is locked. At this time, the thin-walled joint cannot be rotated or moved horizontally, so its upper surface can be processed.

[0023] Specifically, a strip-shaped opening 8 is provided on the bottom surface of both the straight groove 3 and the trajectory groove 5, and a vertical through-channel is provided on the positioning support column 4. The positioning plate 6 is connected to a lifting shaft 9, which passes through the channel on the positioning support column 4. When it is necessary to lock the position of the positioning plate 6, a downward force is applied to the lifting shaft 9.

[0024] When the protruding part on the thin-walled joint is locked on the positioning plate 6, the positioning plate 6 is provided with a locking groove 10, and the protruding part is located in the locking groove 10. When the locking plate 7 is welded to the thin-walled joint and then the locking plate 7 is placed in the locking groove 10, the positioning plate 6 can provide sufficient support force for the thin-walled joint to prevent the thin-walled joint from separating from the positioning plate 6 when its surface is processed.

[0025] To increase the stability of the thin-walled joint, a suction cup assembly is provided at the center of the support 2. This suction cup assembly includes a bottom cylinder 11 fixed on the support 2. The support 2 is provided with a central channel. The bottom cylinder 11 is connected to the upper end of the central channel. The upper part of the bottom cylinder 11 is provided with an external thread 12. An outer sleeve 13 is screwed on through the external thread 12. A disc cover 14 is fixed to the upper end of the outer sleeve 13. By rotating the outer sleeve 13, the horizontal height of the disc cover 14 can be adjusted. After the positioning plate 7 on the thin-walled joint is placed on the positioning plate 6, the outer sleeve 13 is rotated to adjust the height of the disc cover 14 until the disc cover 14 contacts the thin-walled joint. At this time, a pull arm 15 is inserted into the bottom cylinder 11. The upper end of the pull arm 15 is located inside the bottom cylinder 11, and a rubber plug is connected to the upper end of the pull arm 15. When the pull arm 15 moves downward, the disc cover 14 is adsorbed on the lower surface of the thin-walled joint, which increases the stability of the thin-walled joint.

[0026] A power telescopic rod 16 is connected to the lower end of the pull-out arm 15. The power telescopic rod 16 is a hydraulic cylinder or an electric push rod. The power telescopic rod 16 is fixed on the base 1. When the power telescopic rod 16 retracts, it drives the pull-out arm 15 to move downward. At this time, the thin-walled joint is firmly positioned. Conversely, when the power telescopic rod 16 extends, it drives the pull-out arm 15 to move upward. At this time, the thin-walled joint can be removed.

[0027] A pressure plate 17 is provided between the base 1 and the support 2. The base 1 and the support 2 are connected by a support arm 18, which passes through the pressure plate 17. The pressure plate 17 has a circular hole 19, through which the output end of the power telescopic rod 16 passes. A long straight notch 20 and an arc-shaped trajectory notch 21 are also provided on the pressure plate 17. The long straight notch 20 is parallel to the straight groove 3, and the trajectory notch 21 is aligned with the trajectory groove 5. The hanging shaft 9 on the positioning support column 4 located in the straight groove 3 passes through the long straight notch 20, and the hanging shaft 9 on the positioning support column 4 located in the trajectory groove 5 passes through the trajectory notch 21. A tray 22 is fixed to the lower end of each hanging shaft 9, located below the pressure plate 17. A cover plate 23 is fixed to the output section of the power telescopic rod 16, located above the pressure plate 17. When the power telescopic rod 16... When rod 16 is shortened, cover plate 23 moves closer to pressure plate 17, and the distance between them decreases. A compression return spring 24 is provided between cover plate 23 and pressure plate 17. The compression return spring 24 is sleeved on the power telescopic rod 16. When the distance between cover plate 23 and pressure plate 17 decreases, compression return spring 24 is compressed. At this time, compression return spring 24 applies a downward force to pressure plate 17, which in turn applies a downward force to tray 22, causing hanging shaft 9 to apply a downward force to positioning plate 6. A tensioning ring 25 is provided on the top surface of positioning support column 4. The tensioning ring 25 is located below positioning plate 6. When hanging shaft 9 applies a downward force to positioning plate 6, positioning plate 6 presses on tensioning ring 25, thereby locking the position of positioning plate 6. This achieves the simultaneous adsorption of thin-walled joint by suction cup assembly and locking of positioning plate position.

[0028] To increase applicability, a flat extension arm 26 is axially connected to the lower surface of the positioning plate 6. The positioning plate 6 can rotate around the connection point as the central axis. A mating plate 27 is fixed to the free end of the flat extension arm 26. A central hole is provided on the mating plate 27. The upper end of the lifting shaft 9 passes through the central hole on the mating plate 27. An anti-detachment cap 28 is fixed to the upper end of the lifting shaft 9. The anti-detachment cap 28 is located above the mating plate 27. At this time, the mating plate 27 can rotate but cannot be separated from the lifting shaft 9. After the flat extension arm 26 is controlled, the positioning plate 6 moves around the lifting shaft 9. In this way, the position of the positioning plate 6 and the extension angle of the locking groove on the positioning plate 6 can be adjusted. At the same time, combined with the adjustment of the position of the positioning support column 4, it can be used for thin-walled joints of different specifications.

[0029] After adjusting the positioning support column 4 to the designated position, it is necessary to lock the position of the positioning support column 4. Specifically, a pressure plate 29 is provided on the positioning support column 4. This pressure plate 29 is parallel to the upper surface of the support base 2. A vertical through threaded hole is provided on the pressure plate 29. A locking bolt 30 is screwed into the threaded hole. By turning the locking bolt 30, the locking bolt 30 is moved axially. When the lower end of the locking bolt 30 abuts against the upper surface of the support base 2, the position of the positioning support column 4 is locked.

[0030] It should be noted that when welding the positioning plate 7 to the thin-walled joint, a pressure plate can also be connected to the positioning plate 6 by bolts. At this time, the pressure plate is located above the positioning plate 7. By tightening the bolts, the pressure plate can be pressed tightly onto the positioning plate 7. After the surface processing of the thin-walled joint is completed, the positioning plate 7 needs to be cut off so that the thin-walled joint meets the requirements.

[0031] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" 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; they can refer to an electrical connection; they can refer to a hydraulic connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0032] The above description is merely a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be primarily defined by the scope of the claims.

Claims

1. A positioning fixture for a thin-walled joint of an aero-engine, characterized in that: It includes a base and a support seat. The support seat is located above the base. A support arm connects the support seat and the base. The support seat is provided with a straight groove and an arc-shaped track groove. A positioning support column is provided in both the straight groove and the track groove. A positioning plate is provided on the positioning support column. A locking plate is provided above the positioning plate. The locking plate is connected to the thin-walled joint. The positioning plate is connected to a lifting shaft, which passes through the positioning support column and the support bracket and then connects to a pressure plate. The pressure plate is located between the support bracket and the base. A pull-out arm passes through the pressure plate and is connected to a suction cup assembly located above the support bracket. The pull-out arm controls the suction cup assembly to adsorb the thin-walled joint, while the pressure plate applies a downward force to the hanging shaft to lock the positioning plate in place.

2. The positioning fixture for a thin-walled joint of an aero-engine according to claim 1, characterized in that: The upper surface of the positioning plate is provided with a locking groove, and a flat extension arm is axially connected to the positioning plate. The flat extension arm is connected to the upper end of the lifting shaft, and the positioning plate moves around the lifting shaft when the flat extension arm is controlled.

3. A positioning fixture for a thin-walled joint of an aero-engine according to claim 2, characterized in that: A tensioning ring is provided below the positioning plate. The tensioning ring is fixed to the upper end face of the positioning support column. When the lifting shaft applies a downward force to the positioning plate, the positioning plate presses on the tensioning ring.

4. A positioning fixture for a thin-walled joint of an aero-engine according to claim 2 or 3, characterized in that: The lifting shaft passes through the pressure plate, and a tray is fixed to the lower end of the lifting shaft, with the tray located below the pressure plate.

5. A positioning fixture for a thin-walled joint of an aero-engine according to claim 1, characterized in that: The lower end of the pull-out arm is connected to a power telescopic rod, which is mounted on the base. When the power telescopic rod extends or retracts, it drives the pull-out arm to move vertically. The upper end of the pull-out arm is connected to the suction cup assembly.

6. A positioning fixture for a thin-walled joint of an aero-engine according to claim 5, characterized in that: A cover plate is fixed on the pull-out arm, the cover plate is located above the pressure plate, and a compression return spring is sleeved on the pull-out arm, the compression return spring is located between the cover plate and the pressure plate.

7. A positioning fixture for a thin-walled joint of an aero-engine according to claim 5, characterized in that: The suction cup assembly includes a base cylinder fixed on a support base, an outer sleeve screwed onto the base cylinder, a disc cover fixed to the upper end of the outer sleeve, and an upper end of the pull-out arm extending into the base cylinder and fixed with a rubber plug.

8. A positioning fixture for a thin-walled joint of an aero-engine according to claim 1, characterized in that: The positioning support column is equipped with a pressure plate, and the pressure plate has a vertical through threaded hole, into which a locking bolt is screwed.

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