Self-cleaning clamp for front cover of aero-engine

Abstract

The utility model relates to a self-cleaning clamp of an aero-engine front cover, which comprises a positioning seat disc and a base disc, the positioning seat disc is connected with the base disc through two support arms, the positioning seat disc is positioned above the base disc, the positioning seat disc can turn over by 360 degrees, a part locking assembly is arranged on the positioning seat disc, the part locking assembly is used for positioning a workpiece, and the part locking assembly is used for locking the workpiece. The number of the auxiliary supporting arms is two, the two auxiliary supporting arms are symmetrically arranged, the top ends of the two auxiliary supporting arms abut against the positioning base disc, an air injection part is installed in the penetrating hole, and when the positioning base disc is turned over till the workpiece faces downwards, the air injection part injects compressed air to the workpiece; compared with the prior art, the drilling device has the advantages that after a cylindrical object is drilled, the positioning seat disc is turned over by 180 degrees, the opening of the hole faces downwards, air is sprayed to the cylindrical object through the air spraying component, compressed air impacts on metal chips in the hole, the metal chips attached to the inner wall of the hole fall off, and therefore the cylindrical object is drilled. And after the compressed gas injection is stopped, the metal chippings fall out of the hole.

Description

Technical Field

[0001] This utility model belongs to the field of fixtures, specifically to a self-cleaning fixture for drilling and machining the front cover of an aircraft engine. Background Technology

[0002] The front cover of an aero-engine is very important, as it is a crucial component. The part is approximately 50mm high and has a maximum outer diameter of approximately 260mm. It is circular with multiple steps and several large and small columnar bodies distributed on the upper surface. The cross-section is frustum-shaped. The machining area is the top of the three columnar bodies on the upper part of the part. A center hole needs to be machined at the top of the columnar body. The dimensional tolerance of the center hole is only 0.02mm, and the error of the center hole relative to the reference position is Φ0.05. The dimensional and technical precision requirements are very high.

[0003] When traditional fixtures clamp the front cover workpiece and drill a hole, small metal shavings remain in the center hole. When the center hole is a multi-step hole, the remaining metal shavings will affect the drilling accuracy. Other workpieces are needed to help remove the remaining metal shavings from the hole, which is quite troublesome. Utility Model Content

[0004] To solve the above-mentioned technical problems, this utility model provides a self-cleaning clamp for the front cover of an aircraft engine that can easily remove metal debris trapped in holes.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is a self-cleaning fixture for an aircraft engine front cover, comprising a positioning plate and a base plate. The positioning plate is connected to the base plate via two support arms and is located above the base plate. The positioning plate can be rotated 360°. A part stop is provided on the upper surface of the positioning plate, and the workpiece is fitted into the part stop. A part locking assembly is provided on the positioning plate to position the workpiece. The base plate is provided with a through hole and two auxiliary support arms, which are symmetrically arranged. The top ends of the two auxiliary support arms abut against the positioning plate. An air jet component is installed in the through hole. When the positioning plate is rotated to the position where the workpiece faces downward, the air jet component sprays compressed gas onto the workpiece.

[0006] Furthermore, both auxiliary support arms move vertically during rotation, but in opposite directions.

[0007] Furthermore, an adjustment ring is connected to the base plate, which controls the simultaneous movement of the two auxiliary support arms.

[0008] Furthermore, the upper surface of the base plate is provided with two threaded channels, each threaded channel being connected to a rotating cavity. Two auxiliary support arms are screwed into the two threaded channels respectively. The lower end of the auxiliary support arms is connected to a transmission component, which is located inside the rotating cavity and connected to an adjusting ring.

[0009] Furthermore, an annular slide is provided on the circumferential surface of the base plate, and the adjusting ring is assembled in the annular slide. A notch is provided in the annular slide, and the notch communicates with the disc cavity.

[0010] Furthermore, the transmission assembly includes a transmission gear disk, which is located inside the disk cavity and meshes with the adjusting ring. A transmission sleeve is fixed at the center of the transmission gear disk, and the lower end of the auxiliary support arm is located inside the transmission sleeve.

[0011] Furthermore, the transmission sleeve is provided with a pentagonal channel, and a pentagonal nut is provided in the channel. The pentagonal nut is fixedly connected to the lower end of the auxiliary support arm.

[0012] Furthermore, the locking assembly includes an angular positioning block and a pressure plate. The positioning base plate is provided with a radially extending slide groove, the angular positioning block is located in the slide groove, and the pressure plate is connected to the positioning base plate through a screw assembly.

[0013] Furthermore, an end plate is provided at the end of the chute, and a flat push screw passes through the end plate. When the flat push screw rotates, it controls the angular positioning block to slide toward the part, and the angular positioning block engages with the workpiece.

[0014] Compared with the prior art, the beneficial effects of this utility model are as follows: After drilling the columnar body, the positioning base plate is rotated 180° so that the opening of the hole faces downward. At this time, the columnar body is sprayed with compressed gas through the jet component. The compressed gas impacts the metal debris inside the hole, causing the metal debris attached to the inner wall of the hole to fall off. After the compressed gas is stopped, the metal debris will fall out of the hole.

[0015] When it is necessary to machine an angled hole on the front cover, the positioning plate can be tilted and maintained at a specified tilt angle by adjusting the auxiliary support arm. At this time, the drill rod can move vertically and finally machine the angled hole on the front cover. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the main structure of this utility model;

[0017] Figure 2 This is a top view of the structure of this utility model;

[0018] Figure 3 This is a side view of the structure of this utility model;

[0019] Figure 4 This is a schematic diagram of the cross-sectional structure of the base plate of this utility model;

[0020] Figure 5 This is a schematic diagram showing the connection between the disc cavity and the transmission gear in this utility model;

[0021] Figure 6 This is a schematic diagram of the transmission component structure of this utility model;

[0022] Among them, 1-positioning base plate, 2-base plate, 3-support arm, 4-angular positioning block, 5-pressure plate, 6-slide groove, 7-end plate, 8-flat push screw, 9-through hole, 10-auxiliary support arm, 11-jet component, 12-adjusting ring, 13-disc cavity, 14-vertical channel, 15-transmission gear plate, 16-transmission sleeve, 17-pentagonal nut. Detailed Implementation

[0023] 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.

[0024] See Figures 1 to 6 As shown, a self-cleaning fixture for an aircraft engine front cover includes a positioning plate 1 and a base plate 2. The positioning plate 1 is located above the base plate 2. Two support arms 3 are vertically connected to the base plate 2. The two support arms 3 are symmetrically arranged and are telescopic. Each support arm 3 has a short shaft passing through its upper end. A shaft hole is provided on the circumferential surface of the positioning plate 1, and the short shaft is located in the shaft hole. At this time, the positioning plate 1 is connected to the base plate 2 through the two support arms 3, and the positioning plate 1 can be rotated 360°. A part stop is provided on the upper surface of the positioning plate 1. The workpiece is fitted into the part stop, that is, the diameter of the part stop is equal to the diameter of the workpiece. A part locking assembly is provided on the positioning plate 1. After the part locking assembly positions the workpiece, the workpiece faces upward, and drilling or cutting processing can be performed on the workpiece.

[0025] The locking assembly includes an angular positioning block 4 and a pressure plate 5. A radially extending slide groove 6 is provided on the positioning base 1. The angular positioning block 4 is located within the slide groove 6 and can slide within it. A limit groove is provided on the inner wall of the slide groove 6. An anti-detachment protrusion is fixed on the angular positioning block 4, located within the limit groove. At this time, the angular positioning block 4 can only slide within the slide groove 6 but cannot be pulled out. An end plate 7 is provided within the slide groove, located at the end of the slide groove 6 furthest from the center of the positioning base 1. A horizontal screw hole is provided on the end plate 7, through which a push screw 8 passes. The rotation of the push screw 8 controls the angular positioning. Block 4 slides towards the part. An angle positioning block 4 has a notch at one end near the center of the positioning base plate 1. When the protruding post on the workpiece is located in the notch on the angle positioning block 4, the angle positioning block 4 and the workpiece are locked together. At this time, the workpiece cannot rotate within the stop of the part. The pressure plate 5 is connected to the positioning base plate 1 through a screw assembly. For example, the screw is fixed on the upper surface of the positioning base plate 1. The pressure plate 5 has a waist-shaped slot. The screw passes through the waist-shaped slot and is screwed with a nut. The pressure plate 5 can be slid so that the end of the pressure plate 5 near the workpiece moves above the workpiece. Then, the nut is screwed on so that the pressure plate 5 applies pressure to the workpiece, thus locking the position of the workpiece.

[0026] A through hole 9 and an auxiliary support arm 10 are provided on the base plate 2. The through hole 9 is located at the center of the base plate. There are two auxiliary support arms 10, which are symmetrically arranged with the end connection line of the two support arms 3 as the center line. At this time, the end connection line of the two auxiliary support arms 10 is perpendicular to the end connection line of the two support arms 3. The tops of the two auxiliary support arms 10 abut against the positioning plate 1. When the tops of the two auxiliary support arms 10 are on the same horizontal plane, the positioning plate 1 is in a horizontal state. At this time, when the drill rod moves downward, the front cover workpiece can be drilled.

[0027] An air jet component 11 is installed inside the perforation 9. The air jet component 11 includes an air jet nozzle, which is connected to a compressed air tank via an air supply pipe. A switch valve is installed on the air supply pipe. After the initial hole is machined on the upper end face of the columnar body on the front cover workpiece, the positioning base plate 1 is lifted upwards and then rotated 180°. At this time, the workpiece is facing downwards. After the switch valve is opened, the air jet component sprays compressed gas onto the workpiece. The compressed gas impacts the metal debris in the hole, causing the metal debris attached to the inner wall of the hole to fall off. After the compressed gas spraying stops, the metal debris will fall out of the hole. Then the positioning base plate 1 is rotated another 180° so that the front cover workpiece is moved back to the position above the positioning base plate 1, and the initial hole can be drilled again.

[0028] When it is necessary to perform inclined hole machining on the front cover workpiece, the two auxiliary support arms 10 can be controlled to move vertically, but the two auxiliary support arms 10 move in opposite directions. That is, when one auxiliary support arm 10 moves upward, the other auxiliary support arm 10 moves downward. In order to control the two auxiliary support arms 10 to move simultaneously, an adjustment ring 12 is connected to the base plate 2. The adjustment ring 12 controls the two auxiliary support arms 10 to move simultaneously. The two auxiliary support arms 10 can only move vertically when they are both rotating.

[0029] Specifically, a rotating cavity is provided in the base plate 2. The rotating cavity includes a disc cavity 13 and a vertical channel 14. The upper end of the vertical channel is connected to a threaded channel, which extends to the upper surface of the base plate 2. At this time, there are two rotating cavities 13 and two threaded channels. The two threaded channels are left-handed and right-handed threaded channels, respectively. Two auxiliary support arms 10 are screwed to the two threaded channels respectively. When the positioning base plate 1 is in a horizontal state, one of the auxiliary support arms 10 will move upward after rotating, and the other auxiliary support arm 10 will move downward after rotating.

[0030] To control the simultaneous rotation of the two auxiliary support arms 10, a transmission assembly is connected to the lower end of each auxiliary support arm 10. The transmission assembly includes a transmission gear disk 15, which is located inside the disc cavity 13. An annular slide is provided on the circumferential surface of the base disk 2, and a notch is provided in the annular slide, which communicates with the disc cavity 13. At this time, a part of the transmission gear disk 15 is exposed through the notch. An adjusting ring 12 is assembled in the annular slide. The inner circumferential surface of the adjusting ring 12 is provided with protruding teeth, which are arranged at equal intervals around the circumference of the adjusting ring. The transmission gear disk 15 meshes with the adjusting ring 12. When the adjusting ring 12 rotates, it controls the rotation of the transmission gear disk 15 in each disc cavity 13. A transmission sleeve 16 is fixed at the center of the transmission gear disk 15. The transmission sleeve 16 is located in the vertical channel, and the lower end of the auxiliary support arm 10 is located inside the transmission sleeve 16. The inner part is provided with a pentagonal channel. The lower end of the auxiliary support arm 10 is fixedly connected to a pentagonal nut 17. The pentagonal nut 17 is located in the channel. When the adjusting ring 12 rotates, it drives the two transmission gear disks 15 to rotate simultaneously. At this time, the two auxiliary support arms 10 are driven to rotate through the transmission sleeve 16. Since the two threaded channels are left-hand threaded channels and right-hand threaded channels respectively, and the two auxiliary support arms 10 are screwed to the corresponding threaded channels respectively, one auxiliary support arm 10 moves upward after rotating, and the other auxiliary support arm 10 moves downward after rotating. During this process, the pentagonal nut 17 moves in the channel of the transmission sleeve 16. The tops of the two auxiliary support arms 10 are both against the bottom surface of the positioning base disk 1, so that the positioning base disk 1 is kept in an inclined state. At this time, when the drill rod moves downward to drill the front cover workpiece, it will process the inclined hole on the surface of the front cover workpiece.

[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 self-cleaning clamp for the front cover of an aircraft engine, characterized in that: It includes a positioning plate and a base plate. The positioning plate is connected to the base plate via two support arms. The positioning plate is located above the base plate and can be rotated 360°. The upper surface of the positioning base plate is provided with a part stop, the workpiece is fitted into the part stop, and a part locking assembly is provided on the positioning base plate to position the workpiece. The base plate is provided with perforations and auxiliary support arms. There are two auxiliary support arms, which are symmetrically arranged. The tops of the two auxiliary support arms abut against the positioning base plate. An air jet component is installed inside the perforation. When the positioning plate is flipped so that the workpiece faces downwards, the air jet component sprays compressed gas onto the workpiece.

2. The self-cleaning fixture for the front cover of an aircraft engine according to claim 1, characterized in that: Both auxiliary support arms move vertically during rotation, but their directions of movement are opposite.

3. The self-cleaning clamp for the front cover of an aircraft engine according to claim 2, characterized in that: An adjustment ring is connected to the base plate, which controls the simultaneous movement of the two auxiliary support arms.

4. The self-cleaning fixture for the front cover of an aircraft engine according to claim 3, characterized in that: The upper surface of the base plate is provided with two threaded channels, each threaded channel is connected to a rotating cavity, and two auxiliary support arms are screwed to the two threaded channels respectively. The lower end of the auxiliary support arm is connected to a transmission component, which is located in the rotating cavity and connected to the adjusting ring.

5. A self-cleaning clamp for an aircraft engine front cover according to claim 4, characterized in that: The base plate has an annular slide rail on its circumference. An adjusting ring is assembled inside the annular slide rail. The annular slide rail has a notch that communicates with the disc cavity.

6. The self-cleaning clamp for the front cover of an aircraft engine according to claim 5, characterized in that: The transmission assembly includes a transmission gear disk, which is located inside the disk cavity and meshes with the adjusting ring. A transmission sleeve is fixed at the center of the transmission gear disk, and the lower end of the auxiliary support arm is located inside the transmission sleeve.

7. A self-cleaning clamp for an aircraft engine front cover according to claim 6, characterized in that: The transmission sleeve has a pentagonal channel inside, and a pentagonal nut is installed inside the channel. The pentagonal nut is fixedly connected to the lower end of the auxiliary support arm.

8. The self-cleaning fixture for the front cover of an aircraft engine according to claim 1, characterized in that: The locking assembly includes an angular positioning block and a pressure plate. The positioning base plate is provided with a radially extending slide groove. The angular positioning block is located in the slide groove. The pressure plate is connected to the positioning base plate through a screw assembly.

9. A self-cleaning clamp for an aircraft engine front cover according to claim 8, characterized in that: The end of the slide is provided with an end plate, and a flat push screw passes through the end plate. When the flat push screw rotates, it controls the angular positioning block to slide toward the part, and the angular positioning block engages with the workpiece.

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