A special fixture for processing sealing ring of combustion engine

Abstract

The utility model discloses a special fixture for gas turbine seal ring processing, include: first cushion block, upper end has support part, the profiled positioning block is arc structure, is located the support part of first cushion block, has the first accommodating groove and second accommodating groove of accommodating the part to be processed, first accommodating groove and second accommodating groove are arc structure, and the accommodating groove section that first accommodating groove and second accommodating groove combination forms is the L type of transverse arrangement, U type pressboard is set up on the profiled positioning block, and the accommodating space of part to be processed is formed with accommodating groove cooperation, first long pressboard is pressed on U type pressboard, through the profiled positioning block, the reference of two ends leveling and the reference of control groove depth are unified and remove on the profiled positioning block, simplify the step of part clamping, greatly accelerate part clamping speed, and reduce the difficulty of later table review size, and make the part processing keep higher consistency.

Description

Technical Field

[0001] This utility model relates to the field of gas turbine technology, specifically to a special fixture for processing gas turbine sealing rings. Background Technology

[0002] In the machining of gas turbine sealing ring components, there are scenarios where the sealing ring is divided into small arc segments. The positioning reference for the grooves on both sides is difficult to calibrate using a dial indicator, resulting in complex operations and long machining times. Current technology typically uses a traditional clamping plate for fixing and mills the groove bit by bit with an end mill. Because the end face of the part has steps that prevent it from being flattened, proper end face positioning for clamping and leveling the grooved part is difficult, leading to significant uncertainty in each assembly, inconsistent assembly quality, and impacting product accuracy. These parts are generally thin, and excessive pressure cannot be applied to the arc surface during clamping, as this will cause severe deformation. Furthermore, the narrow, thick, and deep characteristics of the grooves on both sides make traditional end mill machining inefficient, time-consuming, and costly, resulting in high tool wear and processing costs. Utility Model Content

[0003] To solve the above technical problems, this utility model provides a special fixture for machining gas turbine sealing rings. By using a contour positioning block, the reference for leveling both ends and the reference for controlling the groove depth are unified and moved outward onto the contour positioning block, which simplifies the part clamping steps, greatly speeds up the part clamping speed, reduces the difficulty of subsequent dimension verification using dial gauges, and ensures that the parts maintain a high degree of consistency after machining.

[0004] The present invention adopts the following technical solution: A special fixture for machining gas turbine sealing rings includes: a first pad block with a support portion at its upper end; a contour positioning block, the main body of which is an arc-shaped structure, located on the support portion of the first pad block, having a first receiving groove and a second receiving groove for accommodating the part to be machined, both the first and second receiving grooves being arc-shaped structures, and the receiving groove formed by the combination of the first and second receiving grooves having a transversely arranged L-shaped cross-section; a U-shaped pressure plate, disposed on the contour positioning block, cooperating with the receiving grooves to form a receiving space for the part to be machined; and a first long pressure plate pressing on the U-shaped pressure plate; by using the contour positioning block to unify and move outward the reference for clamping the part (such as the leveling reference and the groove depth reference), the clamping process is simplified and the clamping time is significantly shortened; the L-shaped receiving groove matches the shape of the T-shaped part, providing stable support and reducing the risk of part deformation caused by uneven clamping force.

[0005] Preferably, the contour positioning block is also provided with longitudinally arranged relief grooves on both sides. The relief grooves provide operating space for machining tools (such as three-sided milling cutters), avoid interference during the machining process, ensure that the tool can smoothly and accurately machine the slot, improve machining safety and efficiency, and reduce tool wear.

[0006] Preferably, the upper surface of the contour positioning block is provided with a positioning seat, and a positioning pin for positioning the part to be processed is arranged horizontally inside the positioning seat. By cooperating with the countersunk hole of the part to be processed, the positioning pin can achieve fast and accurate positioning, reduce manual adjustment time, and improve clamping repeatability and consistency. This design ensures that the position of the part is stable during the processing, reduces the difficulty of dial indicator verification, and improves product accuracy.

[0007] Preferably, the part to be processed is slidably fitted in the first and second receiving grooves. The sliding fit allows the part to be finely adjusted during clamping, which facilitates quick alignment and fixation, further optimizing clamping efficiency. It is particularly suitable for assembling arc-shaped parts and reduces processing errors caused by inaccurate positioning.

[0008] Preferably, a second pad is also provided on one side of the first pad. The two ends of the first long pressure plate are respectively located on the U-shaped pressure plate and the second pad. The second pad provides a stable support point, enabling the first long pressure plate to apply force evenly, enhancing the balance and reliability of clamping, preventing the parts from shifting or vibrating during processing, thereby ensuring processing quality.

[0009] Preferably, the first long pressure plate has a first mounting hole in the middle, a first screw is provided in the first mounting hole, and a first nut and a first washer are provided on the first screw for installing and fixing the first long pressure plate.

[0010] Preferably, the system also includes a third pad located on the other side of the first pad and a second long pressure plate located at both ends on the third pad and the workpiece to be processed, respectively. By pressing the second long pressure plate onto the workpiece to be processed, the vertical positioning of the workpiece to be processed can be achieved.

[0011] Preferably, the second long pressure plate has a second mounting hole in the middle, a second screw is provided in the second mounting hole, and a second nut and a second washer are provided on the second screw for installing and fixing the second long pressure plate.

[0012] Compared with the prior art, this utility model has the following advantages: This application solves the problem of difficult clamping, easy deformation, and inability to flatten the end faces of slotted parts during machining. The fixture has a simple structure and is easy to use. It clamps with minimal clamping force, minimizing or eliminating part deformation caused by clamping force. The reference for leveling both ends and the reference for controlling the groove depth are unified and moved outward on the contour positioning block, greatly accelerating the part clamping speed and reducing the difficulty of subsequent dimension verification using dial gauges. This application unifies and moves the reference for leveling both ends and the reference for controlling the groove depth to the contour positioning block, simplifying the part clamping steps, greatly accelerating the part clamping speed, reducing the difficulty of subsequent dimension verification using dial gauges, and ensuring high consistency of the machined parts. In addition, the innovative use of a three-sided milling cutter head replaces the traditional end mill, significantly improving machining efficiency and reducing tool wear; clamping with minimal clamping force minimizes or eliminates part deformation caused by clamping force. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the structure of a special fixture in use.

[0014] Figure 2 This is a schematic diagram of the special fixture.

[0015] Figure 3 This is a schematic diagram of the structure after the parts are assembled.

[0016] Figure 4 for Figure 3 A schematic diagram of the explosion structure.

[0017] In the figure, the components are: first pad 1, contour positioning block 2, first receiving groove 2-1, second receiving groove 2-2, clearance groove 2-3, U-shaped pressure plate 3, receiving space 4, first long pressure plate 5, first mounting hole 5-1, positioning seat 6, positioning pin 7, second pad 8, first screw 9, first nut 10, third pad 11, second long pressure plate 12, second mounting hole 12-1, second screw 13, and second nut 14. Detailed Implementation

[0018] To facilitate understanding of the technical solution of this utility model, the following detailed description is provided in conjunction with the accompanying drawings and specific embodiments.

[0019] Example 1 like Figure 1-4 As shown, a special fixture for machining gas turbine sealing rings is integrally mounted on a boring machine and includes: The first pad 1 is set on the worktable of the boring machine and has a support part at the upper end; The contour positioning block 2 has an arc-shaped main body and is located on the support part of the first pad block 1. It has a first receiving groove 2-1 and a second receiving groove 2-2 to accommodate the part to be processed. Both the first receiving groove 2-1 and the second receiving groove 2-2 have arc-shaped structures, and the cross section of the receiving groove formed by the combination of the first receiving groove 2-1 and the second receiving groove 2-2 is an L-shaped structure arranged laterally. U-shaped pressure plate 3 is set on contour positioning block 2 and cooperates with receiving groove to form receiving space 4 for the part to be processed; The first long pressure plate 5 presses down on the U-shaped pressure plate 3; By unifying and moving the reference points for part clamping (such as leveling reference points and groove depth reference points) outward using contour positioning blocks, the clamping process is simplified and the clamping time is significantly shortened; the L-shaped receiving groove matches the shape of the T-shaped part, providing stable support and reducing the risk of part deformation caused by uneven clamping force.

[0020] The contour positioning block 2 is also provided with longitudinally arranged relief grooves 2-3 on both sides. The relief grooves provide operating space for machining tools (such as three-sided milling cutters), avoid interference during the machining process, ensure that the tool can smoothly and accurately machine the slot, improve machining safety and efficiency, and reduce tool wear.

[0021] The upper surface of the contour positioning block 2 is provided with a positioning seat 6, and a positioning pin 7 for positioning the part to be processed is arranged horizontally inside the positioning seat 6. By cooperating with the countersunk hole of the part to be processed, the positioning pin can achieve fast and accurate positioning, reduce manual adjustment time, and improve clamping repeatability and consistency. This design ensures that the part is stable in position during processing, reduces the difficulty of dial indicator verification, and improves product accuracy.

[0022] The part to be processed slides within the first receiving groove 2-1 and the second receiving groove 2-2. The sliding fit allows for fine-tuning of the part during clamping, facilitating quick alignment and fixation, further optimizing clamping efficiency. It is particularly suitable for assembling arc-shaped parts, reducing processing errors caused by inaccurate positioning.

[0023] It also includes a second pad 8 disposed on one side of the first pad 1. The two ends of the first long pressure plate 5 are respectively located on the U-shaped pressure plate 3 and the second pad 8. The second pad provides a stable support point, enabling the first long pressure plate to apply force evenly, enhancing the balance and reliability of clamping, preventing the parts from shifting or vibrating during processing, thereby ensuring processing quality.

[0024] The first long pressure plate 5 has a first mounting hole 5-1 in the middle. The first mounting hole 5-1 is provided with a first screw 9 connected to the worktable of the boring machine. The first screw 9 is provided with a first nut 10 and a first washer for installing and fixing the first long pressure plate 5.

[0025] It also includes a third pad 11 disposed on the other side of the first pad 1 and a second long pressure plate 12 with its two ends located on the third pad 11 and the workpiece to be processed, respectively. By pressing the second long pressure plate 12 onto the workpiece to be processed, the vertical positioning of the workpiece to be processed can be achieved.

[0026] The second long pressure plate 12 has a second mounting hole 12-1 in the middle. A second screw 13 connected to the worktable of the boring machine is provided in the second mounting hole 12-1. A second nut 14 and a second washer are provided on the second screw 13 for installing and fixing the second long pressure plate 12.

[0027] In use, the part to be processed is placed on the contour positioning block 2 and slid to the desired position. Then, the part is positioned by inserting the positioning pin 7 into the countersunk hole of the part. Next, the second long pressure plate 12 is placed on the third pad 11 and the part to be processed, and the first long pressure plate 5 is placed on the U-shaped pressure plate 3 and the second pad 8. The parts are then connected and fixed by the corresponding screws, nuts, and washers. Finally, a three-sided milling cutter is used to process the part.

[0028] The above are merely preferred embodiments of this utility model. The scope of protection of this utility model is defined by the scope of the claims. Any improvements and modifications made by those skilled in the art without departing from the spirit and scope of this utility model should also be considered as protection within the scope of this utility model.

Claims

1. A special fixture for the machining of a sealing ring for a combustion engine, characterized in that include: The first pad (1) has a support at its upper end; The contour positioning block (2) has an arc-shaped main body and is located on the support part of the first pad block (1). It has a first receiving groove (2-1) and a second receiving groove (2-2) for accommodating the part to be processed. Both the first receiving groove (2-1) and the second receiving groove (2-2) are arc-shaped, and the cross section of the receiving groove formed by the combination of the first receiving groove (2-1) and the second receiving groove (2-2) is an L-shaped groove arranged laterally. U-shaped pressure plate (3) is set on contour positioning block (2) and cooperates with receiving groove to form receiving space (4) for the part to be processed. The first long pressure plate (5) is pressed on the U-shaped pressure plate (3).

2. The special fixture for machining of the sealing ring of the combustion engine according to claim 1, characterized in that, The contour positioning block (2) is also provided with longitudinally arranged clearance grooves (2-3) on both sides.

3. The special fixture for machining of the sealing ring of the combustion engine according to claim 1, characterized in that, The upper surface of the contour positioning block (2) is provided with a positioning seat (6), and a positioning pin (7) for positioning the part to be processed is arranged horizontally inside the positioning seat (6).

4. The special fixture for machining of the sealing ring of the combustion engine according to claim 1, characterized in that, The part to be processed is slidably fitted in the first receiving groove (2-1) and the second receiving groove (2-2).

5. The special fixture for machining of the sealing ring of the combustion engine according to claim 1, characterized in that, It also includes a second pad (8) disposed on one side of the first pad (1), with the two ends of the first long pressure plate (5) located on the U-shaped pressure plate (3) and the second pad (8) respectively.

6. The special fixture for machining of the sealing ring of the combustion engine according to claim 5, characterized in that, The first long pressure plate (5) has a first mounting hole (5-1) in the middle, and a first screw (9) is provided in the first mounting hole (5-1). A first nut (10) and a first washer are provided on the first screw (9).

7. The special fixture for machining of the sealing ring of the combustion engine according to claim 1, characterized in that, It also includes a third pad (11) disposed on the other side of the first pad (1) and a second long pressure plate (12) with its two ends located on the third pad (11) and the workpiece to be processed, respectively.

8. The special fixture for machining of the sealing ring of the combustion engine according to claim 7, characterized in that, The second long pressure plate (12) has a second mounting hole (12-1) in the middle, and a second screw (13) is provided in the second mounting hole (12-1). A second nut (14) and a second washer are provided on the second screw (13).

Images