A grommet wire cutting fixture

Abstract

The utility model relates to aero -engine parts machining technical field especially relates to a seal ring wire cutting clamp, including annular tool body, the tool body upper surface fixed mounting has the installation ring, the installation ring upper surface fixed mounting has the assembly ring, the top of tool body is equipped with the annular clamp plate, the surface of installation ring is circularly opened and has a plurality of limit mouth, the limit mouth inside slide and insert the locating block, the surface of tool body is circularly equipped with a plurality of cutting edge and straighten the edge. Through installation ring and assembly ring and seal ring inner hole cooperation, locating block determines angular position and clamp plate pressure, realize accurate clamping positioning, reduced because part rigidity is poor, the structure speciality leads to the clamping positioning difficulty, can guarantee tool high accuracy simultaneously, improve product quality, and need not frequently dismounts part when wire cutting, need only rotate tool can complete multi -slit cutting, effectively improve processing efficiency.

Description

Technical Field

[0001] This utility model relates to the field of aero-engine parts processing technology, and in particular to a sealing ring wire cutting fixture. Background Technology

[0002] As the connecting carrier of the high-pressure compressor of an aero-engine, the sealing ring mainly bears the combined forces of mechanical load, thermal load, and high-speed load. With the improvement of the manufacturing precision and thrust-to-weight ratio requirements of aero-engines, the manufacturing precision requirements of the sealing ring of the high-pressure compressor are becoming higher and higher. The sealing ring has a diameter of 369mm, a minimum wall thickness of 1.2mm, and two evenly distributed 1.5×18.4mm square grooves on the circumferential surface with a depth requirement of 0.5mm.

[0003] Because the parts have thin walls and poor rigidity, they are prone to deformation, making it difficult to guarantee dimensional accuracy. In addition, the special structure of the parts makes deformation uncontrollable, making it difficult to clamp and position them during the machining process. Utility Model Content

[0004] The purpose of this utility model is to solve the following shortcomings in the prior art: due to the thin wall thickness and poor rigidity of the parts, they are easy to deform, making it difficult to guarantee dimensional accuracy. At the same time, the special structure of the parts makes deformation uncontrollable, making it difficult to clamp and position them during the processing. Therefore, a sealing ring wire cutting fixture is proposed.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A sealing ring wire cutting fixture includes an annular tooling body, an mounting ring fixedly mounted on the upper surface of the tooling body, an assembly ring fixedly mounted on the upper surface of the mounting ring, the assembly ring being used to assemble with a sealing ring, and an annular pressure plate for pressing the sealing ring is provided above the tooling body, the pressure plate being connected to the assembly ring through a threaded component;

[0007] The surface of the mounting ring is circumferentially provided with multiple limiting openings for matching the square groove of the sealing ring. A positioning block is slidably inserted into the limiting opening, and the positioning block is used to determine the angular position of the sealing ring.

[0008] The surface of the tooling body is circumferentially provided with multiple cutting edges and straightening edges for positioning during wire cutting. There are four cutting edges and four straightening edges, and each cutting edge is perpendicular to each straightening edge to ensure the accuracy of wire cutting.

[0009] Preferably, the threaded component includes multiple locking bolts, the upper surface of the assembly ring is provided with multiple threaded holes in a circumferential shape, the surface of the pressure plate is provided with multiple movable openings in a circumferential shape, the multiple locking bolts are respectively movably connected in the multiple movable openings, and the bottom ends of the multiple locking bolts are respectively threaded into the multiple threaded holes.

[0010] Preferably, the number of threaded holes is eight, and they are evenly distributed on the upper surface of the assembly ring.

[0011] Preferably, the upper surface of the mounting ring and the mating surface of the sealing ring are parallel to each other, and the parallelism is 0.01mm-0.02mm.

[0012] Preferably, an anti-slip layer is bonded to the lower surface of the pressure plate, and the anti-slip layer is made of rubber.

[0013] Preferably, the contact surfaces of the mounting ring and the sealing ring are circumferentially fixedly mounted with multiple sector plates. The inner wall of each sector plate has a horizontally opened threaded opening that penetrates the outer wall. A screw is installed in the threaded opening. One end of the screw that protrudes from the outer wall of the sector plate is rotatably connected to a pad. The lower surface of the pad is slidably connected to the upper surface of the mounting ring.

[0014] Compared with the prior art, the beneficial effects of this utility model are:

[0015] This fixture achieves precise clamping and positioning by using the mounting ring and assembly ring on the upper surface of the ring-shaped fixture body to mate with the inner hole of the sealing ring, the positioning block to determine the angular position, and the pressure plate to clamp. This reduces the difficulty of clamping and positioning caused by poor part rigidity and special structure, while ensuring high precision of the fixture, thereby ensuring machining accuracy and improving product quality. Moreover, the structure is simple and easy to operate. During wire cutting, there is no need to frequently disassemble the parts. Multi-slit cutting can be completed simply by rotating the fixture, which effectively improves processing efficiency and reduces manufacturing costs. Attached Figure Description

[0016] Figure 1 This is a front three-dimensional structural diagram of a sealing ring wire cutting fixture proposed in this utility model;

[0017] Figure 2 This is a three-dimensional structural diagram of a sealing ring cutting fixture proposed in this utility model;

[0018] Figure 3 This is a partial three-dimensional structural diagram of the mounting ring and the sector plate in this utility model;

[0019] Figure 4 for Figure 1 Enlarged view of the structure at point A in the middle;

[0020] Figure 5 for Figure 2Enlarged view of the structure at point B in the middle;

[0021] Figure 6 for Figure 2 Enlarged view of the structure at point C.

[0022] In the diagram: 1 Tooling body, 2 Assembly ring, 3 Threaded hole, 4 Pressure plate, 5 Movable opening, 6 Locking bolt, 7 Positioning block, 8 Cutting edge, 9 Straightening edge, 10 Limiting opening, 11 Fan-shaped plate, 12 Screw, 13 Pad, 14 Mounting ring. 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. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0024] The terms used in this utility model, such as "upper", "lower", "left", "right", "middle" and "one", are only for clarity of description and are not intended to limit the scope of implementation of this utility model. Changes or adjustments to their relative relationships, without substantially altering the technical content, should also be considered as within the scope of implementation of this utility model.

[0025] Example 1

[0026] Reference Figures 1-2 A sealing ring wire cutting fixture includes an annular fixture body 1. An mounting ring 14 is fixedly installed on the upper surface of the fixture body 1. An assembly ring 2 is fixedly installed on the upper surface of the mounting ring 14. The assembly ring 2 is used to assemble with the sealing ring. The upper surface of the mounting ring 14 and the contact surface of the sealing ring are parallel to each other, and the parallelism is 0.01mm-0.02mm. An annular pressure plate 4 for pressing the sealing ring is provided above the fixture body 1. The pressure plate 4 is connected to the assembly ring 2 through a threaded component. The threaded component includes multiple locking bolts 6. The upper surface of the assembly ring 2 has multiple threaded holes 3 in a circumferential shape. There are eight threaded holes 3, which are evenly distributed on the upper surface of the assembly ring 2. The surface of the pressure plate 4 has multiple movable openings 5 ​​in a circumferential shape. The multiple locking bolts 6 are movably connected in the multiple movable openings 5, and the bottom ends of the multiple locking bolts 6 are threaded into the multiple threaded holes 3.

[0027] Reference Figures 4-6 The surface of the mounting ring 14 is circumferentially provided with multiple limiting ports 10 for matching the square groove of the sealing ring. A positioning block 7 is slidably inserted into the limiting port 10. The positioning block 7 is used to determine the angular position of the sealing ring.

[0028] The surface of the fixture body 1 is circumferentially provided with multiple cutting edges 8 and straightening edges 9 for positioning during wire cutting. There are four cutting edges 8 and four straightening edges 9. Each cutting edge 8 is perpendicular to each straightening edge 9 to ensure the accuracy of wire cutting.

[0029] First, the sealing ring to be processed is installed into the tooling body 1, so that the lower surface of the sealing ring is in close contact with the upper surface of the mounting ring 14, and the inner ring wall of the sealing ring is fitted with the outer circular wall of the assembly ring 2. The outer circle of the assembly ring 2 is used to radially limit the sealing ring, and the upper surface of the mounting ring 14 is used to ensure the horizontal placement of the sealing ring, thereby reducing the initial assembly error.

[0030] Subsequently, the sealing ring is positioned angularly. Based on the position of the pre-set square groove on the circumferential surface of the sealing ring, the sealing ring is rotated so that the two pre-set square grooves on its circumferential surface correspond to the positions of the two limiting ports 10. Then, the positioning block 7 is slid into the limiting port 10 on the surface of the mounting ring 14 so that the positioning block 7 is embedded in the square groove of the sealing ring. Through the matching and cooperation between the positioning block 7 and the square groove, the angular position of the sealing ring is accurately determined, avoiding circumferential offset during the processing.

[0031] After positioning, cover the upper surface of the sealing ring with the pressure plate 4, aligning the multiple movable openings 5 ​​on the pressure plate 4 with the eight threaded holes 3 on the upper surface of the assembly ring 2. Then, pass the eight locking bolts 6 through the movable openings 5 ​​and screw them into the corresponding threaded holes 3. Tighten the locking bolts 6 until the pressure plate 4 tightly presses the sealing ring together, ensuring that the sealing ring will not move axially during the processing.

[0032] During wire EDM, the four cutting edges 8 and four straightening edges 9 distributed circumferentially on the surface of the fixture body 1 are used for positioning. Straightening any set of straightening edges 9 and cutting edges 8 allows the molybdenum wire to be fed along the cutting edges 8, ensuring the machining accuracy of the first cut. After completing the first cut, there is no need to disassemble the sealing ring and the fixture. Simply rotate the fixture body 1 90 degrees to align the next set of straightening edges 9 with the cutting edges 8. Repeat the above cutting operation to complete the machining of the remaining cuts in sequence. The fixture in this embodiment achieves precise clamping and efficient machining of thin-walled, easily deformable sealing rings through the above assembly and machining process, effectively ensuring product dimensional accuracy and machining efficiency.

[0033] The lower surface of the pressure plate 4 is bonded with an anti-slip layer made of rubber. The rubber anti-slip layer has good elasticity and adhesion, which can increase the friction between the annular pressure plate 4 and the sealing ring contact surface, improve the pressing effect, and prevent damage to the sealing ring surface due to pressure.

[0034] Example 2

[0035] Unlike the assembly ring 2 described above, which is used for assembly with the sealing ring, referring to Figure 3 The mounting ring 14 and the sealing ring are circumferentially fixedly mounted with multiple sector plates 11. The inner wall of the sector plate 11 is horizontally opened with a threaded opening that penetrates the outer wall. A screw 12 is installed in the threaded opening. One end of the screw 12 that protrudes from the outer wall of the sector plate 11 is rotatably connected to a pad 13. The lower surface of the pad 13 is slidably connected to the upper surface of the mounting ring 14.

[0036] When assembling the sealing ring, first place the sealing ring on the upper surface of the mounting ring 14 so that the lower surface of the sealing ring is in contact with the mounting ring 14. At this time, the inner hole of the sealing ring and the outer wall of the multiple sector plates 11 form a preliminary fit. Then, by tightening the screws 12 on each sector plate 11, the pad 13 is pushed to move radially outward along the mounting ring 14 until the outer wall of the pad 13 is tightly fitted with the inner hole of the sealing ring, thereby realizing the radial clamping and positioning of the sealing ring. The angular positioning and axial pressing structure (positioning block 7, pressure plate 4, etc.) is the same as in Embodiment 1, and will not be described again here.

[0037] In Embodiment 1, the outer circle of the integral assembly ring 2 forms a rigid fit with the inner hole of the sealing ring, relying on the accuracy of the outer circle of the assembly ring 2 to ensure radial positioning. In Embodiment 2, a combination structure of multiple sector plates 11, screws 12, and pads 13 is used. By adjusting the screws 12 to push the pads 13, adaptive clamping of the inner hole of the sealing ring is achieved. This is a flexible and adjustable positioning structure with stronger adaptability. For sealing rings with slight deviations in inner hole size due to processing errors or deformation, the screws 12 on different sector plates 11 can be adjusted individually to make the pads 13 fit with the inner hole of the sealing ring at multiple points, avoiding positioning deviations caused by gaps or interference of the integral assembly ring 2. At the same time, the clamping force is controllable. By controlling the tightening degree of the screws 12, the radial clamping force on the sealing ring can be precisely adjusted, which can ensure sufficient positioning stability and avoid additional deformation of the thin-walled sealing ring due to rigid interference fit. It is especially suitable for easily deformable parts with a wall thickness of 1.2mm.

[0038] In this invention, the fixture achieves precise clamping and positioning by using the mounting ring 14 and assembly ring 2 on the upper surface of the annular fixture body 1 to cooperate with the inner hole of the sealing ring, the positioning block 7 to determine the angular position, and the pressure plate 4 to press. This reduces the difficulty of clamping and positioning caused by poor rigidity and special structure of the parts, while ensuring high precision of the fixture, thereby ensuring processing accuracy and improving product quality. Moreover, the structure is simple and easy to operate. During wire cutting, there is no need to frequently disassemble the parts. Multi-slit cutting can be completed simply by rotating the fixture, which effectively improves processing efficiency and reduces manufacturing costs.

[0039] In this utility model, unless otherwise explicitly specified and limited, the terms "installation", "connection", "linking", "fixing", etc., should be interpreted broadly.

[0040] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A sealing ring wire cutting fixture, comprising a ring-shaped tooling body (1), characterized in that, An installation ring (14) is fixedly installed on the upper surface of the tooling body (1), and an assembly ring (2) is fixedly installed on the upper surface of the installation ring (14). The assembly ring (2) is used to assemble with the sealing ring. An annular pressure plate (4) for pressing the sealing ring is provided above the tooling body (1). The pressure plate (4) is connected to the assembly ring (2) through a threaded component. The surface of the mounting ring (14) is circumferentially provided with multiple limiting ports (10) for matching the square groove of the sealing ring. A positioning block (7) is slidably inserted in the limiting port (10). The positioning block (7) is used to determine the angular position of the sealing ring. The surface of the tooling body (1) is circumferentially provided with multiple cutting edges (8) and straightening edges (9) for positioning during wire cutting. There are four cutting edges (8) and four straightening edges (9). Each cutting edge (8) is perpendicular to each straightening edge (9) to ensure the accuracy of wire cutting.

2. The sealing ring wire cutting fixture according to claim 1, characterized in that, The threaded component includes multiple locking bolts (6), the upper surface of the assembly ring (2) is provided with multiple threaded holes (3) in a circumferential shape, the surface of the pressure plate (4) is provided with multiple movable openings (5) in a circumferential shape, the multiple locking bolts (6) are respectively movably connected in the multiple movable openings (5), and the bottom ends of the multiple locking bolts (6) are respectively threaded into the multiple threaded holes (3).

3. A sealing ring wire cutting fixture according to claim 2, characterized in that, The number of threaded holes (3) is eight, and they are evenly distributed on the upper surface of the assembly ring (2).

4. A sealing ring wire cutting fixture according to claim 1, characterized in that, The upper surface of the mounting ring (14) is parallel to the mating surface of the sealing ring, and the parallelism is 0.01mm-0.02mm.

5. A sealing ring wire cutting fixture according to claim 1, characterized in that, The lower surface of the pressure plate (4) is bonded with an anti-slip layer, which is made of rubber.

6. A sealing ring wire cutting fixture according to claim 1, characterized in that, The mounting ring (14) and the sealing ring are circumferentially fixedly mounted with multiple sector plates (11). The inner wall of the sector plate (11) is horizontally provided with a threaded opening that penetrates the outer wall. A screw (12) is installed in the threaded opening. One end of the screw (12) that protrudes from the outer wall of the sector plate (11) is rotatably connected to a pad (13). The lower surface of the pad (13) is slidably connected to the upper surface of the mounting ring (14).

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