Clamping tool for air pipe joint electric spark piercing machining

Abstract

The utility model provides a kind of aviation pipe joint electric spark drilling processing is clamped frock, including base, movable clamp block, static clamp block, push-pull quick fixture and limit stopper;Static clamp block is fixed on base, movable clamp block is slidably connected on base, push-pull quick fixture is fixed on base, movable clamp block is connected with the drive end of static clamp block, push-pull quick fixture is used to drive movable clamp block to be close to or away from static clamp block, the inner wall of static clamp block and movable clamp block is all provided with the clamping groove of the "V" letter shape, two clamping grooves are used to cooperate with the convex portion of the hexagonal shape on the outer wall of aviation pipe joint and are circumferentially limited, limit stopper is fixed on the base of the rear side of movable clamp block and static clamp block, limit stopper is used to abut with the rear end of aviation pipe joint to realize the limiting of aviation pipe joint;The utility model has the advantage that aviation pipe joint is clamped or unclamped state conveniently.

Description

Technical Field

[0001] This utility model relates to the field of clamping fixtures for processing aviation pipe fittings, and more specifically, to a clamping fixture for electrical discharge machining of aviation pipe joints. Background Technology

[0002] Aviation pipe fittings are connecting devices used to connect pipes in aircraft engines. Currently, in the production process of aviation pipe fittings, electrical discharge machining (EDM) is required. Before EDM, the aviation pipe fittings need to be clamped. The current clamping method is as follows: a pressure block is set on the worktable of the EDM machine, and a bolt passes through the pressure block, with the bolt's threaded end connected to the worktable of the EDM machine. When clamping the aviation pipe fitting, it is placed on the pressure block and subjected to EDM. Between the worktables of the equipment, the bolts are tightened to press the aircraft pipe fitting onto the worktable of the EDM machine. Then, the EDM machining of the aircraft pipe fitting can begin. After the aircraft pipe fitting is machined, the operator needs to loosen the bolts to release the clamping block from the aircraft pipe fitting. Finally, the aircraft pipe fitting can be removed from between the clamping block and the worktable of the EDM machine. However, in the above process, the bolts need to be tightened repeatedly when clamping or unclamping the aircraft pipe fitting, which is a disadvantage of the cumbersome clamping and unclamping process. Utility Model Content

[0003] The technical problem to be solved by this utility model is to provide a clamping fixture for EDM drilling of aviation pipe joints, which has the advantage of being convenient for clamping or unclamping aviation pipe joints.

[0004] This utility model provides a clamping fixture for EDM drilling of aviation pipe fittings, including a base, a movable clamping block, a stationary clamping block, a push-pull quick clamp, and a limiting stop. The stationary clamping block is fixed on the base, the movable clamping block is slidably connected to the base, the push-pull quick clamp is fixed on the base, the movable clamping block is connected to the driving end of the stationary clamping block, and the push-pull quick clamp is used to drive the movable clamping block closer to or away from the stationary clamping block. Both the stationary and movable clamping blocks have "V"-shaped clamping grooves on their inner walls. The two clamping grooves are used to engage with a regular hexagonal protrusion on the outer wall of the aviation pipe fitting for clamping and circumferential limiting. The limiting stop is fixed on the base located behind the movable and stationary clamping blocks. The limiting stop is used to abut against the rear end of the aviation pipe fitting to limit the aviation pipe fitting.

[0005] By adopting the above-described structure, this utility model allows the moving clamp to move closer to or further away from the stationary clamp simply by operating the push-pull quick clamp, thus facilitating the clamping or unclamping of the aviation pipe fitting by the moving and stationary clamps. This provides the advantage of convenient clamping or unclamping of the aviation pipe fitting. Furthermore, the utility model incorporates a limiting stop that abuts against the rear end of the aviation pipe fitting to limit its movement, thereby improving the clamping accuracy of the aviation pipe fitting after clamping by the moving and stationary clamps.

[0006] In one possible implementation, a support base is fixed on the base, and the upper end of the support base is provided with a dovetail-shaped first sliding groove extending from left to right. The lower end of the movable clamping block is provided with a dovetail-shaped first slider, which slides in the first sliding groove. With this structure, under the cooperation of the first slider and the first sliding groove, the movable clamping block can be reliably slidably connected to the support base from left to right, that is, it can be reliably slidably connected to the base from left to right. Since both the first slider and the first sliding groove are dovetail-shaped, the movable clamping block can be prevented from vertically detaching from the support base when it slides left to right relative to the base.

[0007] In one possible implementation, the limiting block has an elongated hole extending from front to back, with the elongated hole vertically penetrating the limiting block. The limiting block is fastened to the base by bolts, with the bolt's threaded portion vertically passing through the elongated hole and threadedly connected to the base. With this structure, when the bolts are loosened, the limiting block can slide back and forth relative to the base. That is, when different types of aviation pipe fittings need to be subjected to EDM drilling, the front and back positions of the limiting block can be flexibly adjusted so that the limiting block can limit the front and back positions of different types of aviation pipe fittings to meet the requirements of EDM drilling for different aviation pipe fittings. After the front and back positions of the limiting block are adjusted, the bolts are tightened again to secure the limiting block to the base.

[0008] In one possible implementation, the bottom of the limiting block is provided with a second slider extending from front to back, and the base is provided with a second slide groove extending from front to back. The second slider is slidably engaged in the second slide groove. With this structure, under the cooperation of the second slider and the second slide groove, when the bolt is loosened, the limiting block can only slide back and forth relative to the base, which can prevent the horizontal rotation of the limiting block relative to the base. This can guide and limit the back and forth adjustment of the limiting block relative to the base, and improve the reliability of the limiting block when sliding back and forth relative to the base. Attached Figure Description

[0009] Figure 1 This is a schematic diagram of the first three-dimensional structure of the aviation pipe fitting after clamping. Figure 2 This is a schematic diagram of the second three-dimensional structure of the present invention after the aviation pipe fitting is clamped. Figure 3 This is a third three-dimensional structural diagram of the aviation pipe fitting after it has been clamped. Detailed Implementation

[0010] First, those skilled in the art should understand that these embodiments are merely used to explain the technical principles of the embodiments of this application and are not intended to limit the scope of protection of the embodiments of this application. Those skilled in the art can make adjustments as needed to adapt to specific application scenarios.

[0011] In the description of the embodiments of this application, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" 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. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of this application based on the specific circumstances.

[0012] In the embodiments of this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0013] The present application will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0014] See Figures 1-3As shown in the embodiment of this application, a clamping fixture for EDM drilling of an aviation pipe joint is disclosed, including a base 1, a movable clamping block 2, a stationary clamping block 3, a push-pull quick clamp 4, and a limiting stop 5. The stationary clamping block 3 is fixed on the base 1, the movable clamping block 2 is slidably connected to the base 1, the push-pull quick clamp 4 is fixed on the base 1, the movable clamping block 2 is connected to the driving end of the stationary clamping block 3, and the push-pull quick clamp 4 is used to drive the movable clamping block 2 to approach or move away from the stationary clamping block 3. The inner walls of the stationary clamping block 3 and the movable clamping block 2 are provided with "V"-shaped clamping grooves 6. The two clamping grooves 6 are used to cooperate with the hexagonal protrusions 71 located on the outer wall of the aviation pipe joint 7 for clamping and circumferential limiting. The limiting stop 5 is fixed on the base 1 located behind the movable clamping block 2 and the stationary clamping block 3. The limiting stop 5 is used to abut against the rear end of the aviation pipe joint 7 to limit the aviation pipe joint 7.

[0015] A support base 8 is fixed on the base 1. The upper end of the support base 8 is provided with a dovetail-shaped first sliding groove 81 extending from left to right. The lower end of the movable clamping block 2 is provided with a dovetail-shaped first slider 21. The first slider 21 is slidably engaged in the first sliding groove 81. With this structure, under the cooperation of the first slider and the first sliding groove, the movable clamping block can be reliably slidably connected to the support base from left to right, that is, it can be reliably slidably connected to the base from left to right. Since both the first slider and the first sliding groove are dovetail-shaped, the movable clamping block can be prevented from vertically detaching from the support base when it slides left to right relative to the base.

[0016] The limiting block 5 is provided with an elongated hole 51 extending from front to back. The elongated hole 51 vertically penetrates the limiting block 5. The limiting block 5 is fastened to the base 1 by bolts 9. The threaded part of the bolt 9 is vertically inserted into the elongated hole 51 and threadedly connected to the base 1. With this structure, when the bolt is loosened, the limiting block can slide back and forth relative to the base. That is, when it is necessary to perform EDM drilling on different types of aviation pipe fittings, the front and back positions of the limiting block can be flexibly adjusted so that the limiting block can limit the front and back of different types of aviation pipe fittings to meet the requirements of EDM drilling on different aviation pipe fittings. After the front and back positions of the limiting block are adjusted, the bolt is tightened again to fasten the limiting block to the base.

[0017] The bottom of the limiting block 5 is provided with a second slider 52 extending from front to back, and the base 1 is provided with a second slide groove 11 extending from front to back. The second slider 52 is slidably engaged in the second slide groove 11. With this structure, under the action of the second slider and the second slide groove, when the bolt is loosened, the limiting block can only slide back and forth relative to the base, which can prevent the horizontal rotation of the limiting block relative to the base. This can guide and limit the back and forth adjustment of the limiting block relative to the base, and improve the reliability of the limiting block when sliding back and forth relative to the base.

[0018] In use, the base of this invention is fixed on the machining table of an EDM (Electrical Discharge Machining) machine. When using this invention to clamp aviation pipe fittings, the aviation pipe fitting is first placed between the moving clamp and the stationary clamp. Then, the rear end of the aviation pipe fitting abuts against the limiting block to achieve front and rear limiting of the aviation pipe fitting. Next, the push-pull quick clamp is operated to drive the moving clamp to move closer to the stationary clamp. After the moving clamp moves closer to the stationary clamp, the two clamping slots can cooperate to clamp the hexagonal protrusion on the outer wall of the aviation pipe fitting, thereby achieving clamping of the aviation pipe fitting and circumferential limiting of the aviation pipe fitting. Then, EDM machining of the aviation pipe fitting can begin. After the aviation pipe fitting is machined, the push-pull quick clamp is operated again to drive the moving clamp to move away from the stationary clamp. At this time, the moving and stationary clamps can release the clamping of the aviation pipe fitting.

[0019] The above description is merely a specific embodiment of this application, but the scope of protection of this application 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 application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A clamping fixture for electrical discharge machining of aerospace pipe fittings, characterized in that: It includes a base (1), a movable clamping block (2), a stationary clamping block (3), a push-pull quick clamp (4), and a limiting stop (5); the stationary clamping block (3) is fixed on the base (1), the movable clamping block (2) is slidably connected to the base (1), the push-pull quick clamp (4) is fixed on the base (1), the movable clamping block (2) is connected to the driving end of the stationary clamping block (3), and the push-pull quick clamp (4) is used to drive the movable clamping block (2) to move closer to or away from the stationary clamping block (3). The inner walls of the stationary clamp (3) and the moving clamp (2) are provided with "V"-shaped clamping grooves (6). The two clamping grooves (6) are used to cooperate with the hexagonal protrusions (71) on the outer wall of the aviation pipe connector (7) for clamping and circumferential limiting. The limiting block (5) is fixed on the base (1) located behind the moving clamp (2) and the stationary clamp (3). The limiting block (5) is used to abut against the rear end of the aviation pipe connector (7) to limit the aviation pipe connector (7).

2. The clamping fixture for EDM drilling of aerospace pipe joints according to claim 1, characterized in that: A support seat (8) is fixed on the base (1). The upper end of the support seat (8) is provided with a first slide groove (81) in the shape of a dovetail extending from left to right. The lower end of the movable clamping block (2) is provided with a first slider (21) in the shape of a dovetail. The first slider (21) is slidably engaged in the first slide groove (81).

3. The fixture for EDM drilling of aerospace pipe joints according to claim 1 or 2, characterized in that: The limiting block (5) is provided with an elongated hole (51) extending from front to back. The elongated hole (51) vertically penetrates the limiting block (5). The limiting block (5) is fastened to the base (1) by a bolt (9). The threaded part of the bolt (9) is vertically inserted into the elongated hole (51) and threadedly connected to the base (1).

4. The clamping fixture for EDM drilling of aerospace pipe joints according to claim 3, characterized in that: The bottom of the limiting block (5) is provided with a second slider (52) extending from front to back, and the base (1) is provided with a second slide groove (11) extending from front to back. The second slider (52) slides in the second slide groove (11).

Images