A positioning and clamping fixture for laser processing of rotary thin-walled sealing components

Abstract

This utility model relates to the field of machining technology for rotary thin-walled seals. The technical problem this utility model aims to solve is the deformation of seals caused by clamping and fixing them. To address this problem, this utility model provides a positioning and clamping fixture for laser machining of rotary thin-walled seals. This utility model includes: a base plate; a central locking member with a conical structure; the central locking member is slidably connected to the base plate along its axial direction; multiple contoured positioning blocks are spaced circumferentially around the outer side of the central locking member; the contoured positioning blocks are slidably connected to one side of the base plate along the radial direction of the central locking member; the inner wall of each contoured positioning block has a conical surface that mates with the outer wall of the central locking member; the central locking member moves towards the base plate to drive the contoured positioning blocks to move radially outward. This utility model ensures stable and reliable clamping and positioning of the seal without causing deformation.

Description

Technical Field

[0001] This utility model relates to the field of rotary thin-walled seal processing technology, and in particular to a positioning and clamping fixture for laser processing of rotary thin-walled seals. Background Technology

[0002] Currently, expanded thin-walled seals for aerospace applications have a wide range of uses, especially in high-temperature alloy seals in the rear section of combustion chambers. Due to structural constraints during the design of rotary thin-walled seals, their forming method is mostly stamping / expansion. In existing technologies, the material removal machining at both ends and on the profile of rotary thin-walled seals is difficult because even slightly high machining forces will deform the seal, affecting machining accuracy and making efficient and precise machining challenging; therefore, it is difficult to achieve using ordinary machining or manual fitter work. To solve these problems, laser processing (e.g., using three-dimensional five-axis laser processing equipment) is employed.

[0003] However, in the laser processing of thin-walled seals, grippers are used to clamp and position the seal from its outer wall. If the clamping force is too large, it will cause the thin-walled seal to deform; if the clamping force is too small, it will affect the positioning and clamping effect. Therefore, it is necessary to design a device that can provide the positioning and clamping force without causing deformation of the thin-walled seal. Utility Model Content

[0004] Therefore, the technical problem to be solved by this utility model is to overcome the above-mentioned problems existing in the prior art.

[0005] To solve the above-mentioned technical problems, this utility model provides a positioning and clamping fixture for laser processing of rotary thin-walled sealing components, comprising:

[0006] Base plate;

[0007] The central locking element has a conical structure; along the axial direction of the central locking element, it is slidably connected to the base plate.

[0008] Multiple contour positioning blocks are spaced apart circumferentially on the outside of the central locking member; the contour positioning blocks are slidably connected to one side of the base plate along the radial direction of the central locking member; the inner wall of the contour positioning block is provided with a conical surface, which cooperates with the outer wall of the central locking member; the central locking member moves towards the base plate to drive the contour positioning blocks to move radially outward.

[0009] In one embodiment of this utility model, there are four contour positioning blocks; the four contour positioning blocks are divided into two first positioning blocks and two second positioning blocks; the two first positioning blocks are symmetrically arranged; the two second positioning blocks are symmetrically arranged; the central angle of the second positioning block is larger than the central angle of the first positioning block.

[0010] In one embodiment of this utility model, the application further includes a connector; the base plate is provided with an oblong hole, which extends radially along the central locking member; the connector passes through the oblong hole and connects to the contour positioning block.

[0011] In one embodiment of this utility model, a slider is connected to one side of the contour positioning block, and the slider and the waist-shaped hole form a sliding pair.

[0012] In one embodiment of this utility model, the central locking member is connected to the base plate by locking screws.

[0013] In one embodiment of this utility model, the outer wall of the contour positioning block is provided with multiple clearance grooves at intervals; the sealing element removes material to form a processing groove; the clearance grooves correspond one-to-one with the processing grooves; the width of the clearance grooves is greater than the width of the processing grooves.

[0014] In one embodiment of this utility model, the roughness of the conical surface of the contour positioning block is 0.8~1.6 micrometers; the roughness of the outer wall of the central locking member is 0.8~1.6 micrometers.

[0015] In one embodiment of this utility model, the application further includes a connecting shaft, which is connected to the side of the base plate away from the central locking member.

[0016] In one embodiment of this utility model, the connecting shaft is coaxially connected with the central locking member.

[0017] In one embodiment of this utility model, the base plate has a circular structure.

[0018] The above-mentioned technical solution of this utility model has the following advantages compared with the prior art:

[0019] The positioning and clamping fixture for laser processing of rotary thin-walled seals described in this utility model has multiple contoured positioning blocks spaced circumferentially on the outer wall of the central locking member. The conical surface of the contoured positioning blocks mates with the outer wall of the central locking member. When the central locking member moves axially to approach the base plate, it drives the contoured positioning blocks to move radially outward, thereby spreading the multiple contoured positioning blocks apart. This allows the seal to be fixed from the inner wall (rather than from the outer wall of the seal). This provides the required clamping force to the seal, ensuring stable and reliable clamping and positioning of the seal without causing deformation. Attached Figure Description

[0020] To make the content of this utility model easier to understand, the present utility model will be further described in detail below with reference to specific embodiments and accompanying drawings, wherein:

[0021] Figure 1This is a schematic diagram of the structure of a positioning and clamping fixture for laser processing of rotary thin-walled sealing components in a preferred embodiment of the present invention;

[0022] Figure 2 yes Figure 1 The diagram shown is a front view of the positioning and clamping fixture used for laser processing of rotary thin-walled seals.

[0023] Figure 3 yes Figure 2 AA section view;

[0024] Figure 4 yes Figure 1 The diagram shows a positioning and clamping fixture used for laser processing of rotary thin-walled seals, which clamps the seals.

[0025] Figure 5 yes Figure 4 BB cross-sectional view;

[0026] Instruction manual drawing reference numerals: 100, base plate; 110, oblong hole;

[0027] 200. Center locking element;

[0028] 300, contour positioning block; 310, conical surface; 320, first positioning block; 330, second positioning block; 340, slider; 350, clearance groove;

[0029] 400. Connectors;

[0030] 500. Locking screws;

[0031] 600. Connecting shaft; 610. First shaft segment; 620. Intermediate shaft segment; 630. Second shaft segment;

[0032] 700. Sealing element; 710. Machining groove. Detailed Implementation

[0033] The present invention will be further described below with reference to the accompanying drawings and specific embodiments, so that those skilled in the art can better understand and implement the present invention. However, the embodiments are not intended to limit the present invention.

[0034] Reference Figures 1-5 As shown, this utility model embodiment provides a positioning and clamping fixture for laser processing of rotary thin-walled sealing components, including:

[0035] Base plate 100;

[0036] The central locking element 200 has a conical structure; along the axial direction of the central locking element 200, the central locking element 200 is slidably connected to the base plate 100;

[0037] Multiple contour positioning blocks 300 are spaced apart circumferentially on the outer side of the central locking member 200; the contour positioning blocks 300 are slidably connected to one side of the base plate 100 along the radial direction of the central locking member 200; the inner wall of the contour positioning block 300 is provided with a conical surface 310, which cooperates with the outer wall of the central locking member 200; the central locking member 200 moves toward the base plate 100 to drive the contour positioning blocks 300 to move radially outward.

[0038] Specifically, in this embodiment, multiple contoured positioning blocks 300 are arranged circumferentially at intervals on the outer wall of the central locking member 200, and the conical surface 310 of the contoured positioning block 300 cooperates with the outer wall of the central locking member 200. When the central locking member 200 moves axially to approach the base plate 100, it will drive the contoured positioning blocks 300 to move radially outward, thereby spreading the multiple contoured positioning blocks 300 apart, so that this application can fix it from the inner wall of the sealing member 700 (instead of applying pressure and clamping it from the outer wall of the sealing member 700). This ensures the clamping force on the sealing member 700 without causing the sealing member 700 to deform.

[0039] Furthermore, there are four contour positioning blocks 300; these four contour positioning blocks 300 are divided into two first positioning blocks 320 and two second positioning blocks 330; the two first positioning blocks 320 are symmetrically arranged; the two second positioning blocks 330 are symmetrically arranged; the central angle of the second positioning block 330 is larger than that of the first positioning block 320. Specifically, in order to ensure that the contour positioning block 300 can have a larger contact area with the outer wall of the sealing element 700 after being opened, the gap between two adjacent contour positioning blocks 300 is designed to be relatively small; a small gap will result in a smaller sliding stroke of the contour positioning block 300, which makes it inconvenient to install the sealing element 700 on this application. Therefore, in order to ensure a larger contact area between the contour positioning block 300 and the outer wall of the seal 700 after being opened by the central locking member 200, and to facilitate the installation of the seal 700 on this application, this embodiment provides two larger second positioning blocks 330 and two smaller first positioning blocks 320. Thus, when installing or removing the seal 700, it is only necessary to move the central locking member 200 away from the base plate 100, and then remove the first positioning blocks 320 from the base plate 100, allowing for quick removal of the seal 700. When installing the seal 700, first place the seal 700 on the two second positioning blocks 330, then install the first positioning blocks 320 on the base plate 100, and then move the central locking member 200 towards the side closer to the base plate 100, causing the four contour positioning blocks 300 to open outwards and abut against the inner wall of the seal 700.

[0040] Furthermore, this application also includes a connector 400 (e.g., a bolt); the base plate 100 is provided with an oblong hole 110, which extends radially along the central locking member 200; the connector 400 passes through the oblong hole 110 and connects to the contour positioning block 300. Specifically, this embodiment achieves the connection between the base plate 100 and the contour positioning block 300 through the connector 400, and also achieves the movement of the contour positioning block 300 relative to the base plate 100 through the sliding of the connector 400 in the oblong hole 110, resulting in a simple structure.

[0041] Furthermore, a slider 340 is connected to one side of the contour positioning block 300, and the slider 340 and the oblong hole 110 form a sliding pair. Specifically, in this embodiment, the sliding of the contour positioning block 300 is made smoother by the cooperation between the slider 340 and the oblong hole 110.

[0042] Furthermore, the central locking member 200 is connected to the base plate 100 via locking screws 500. Specifically, in this embodiment, the central locking member 200 is moved axially by tightening or loosening the locking screws 500, thereby allowing the contour positioning block 300 to move outward and rest against the inner side of the sealing member 700. The structure is simple and the operation is convenient.

[0043] Furthermore, the outer wall of the contour positioning block 300 is provided with a plurality of clearance grooves 350 at intervals; after material removal from the sealing member 700, a processing groove 710 is formed; the clearance grooves 350 and the processing grooves 710 correspond one-to-one; the width of the clearance groove 350 is greater than the width of the processing groove 710. In some embodiments, the width of the clearance groove 350 is 1.6 mm to 3 mm larger than the width of the processing groove 710. Specifically, this embodiment provides clearance grooves 350 corresponding to the processing grooves 710, so that when material is removed from the sealing member 700 to form the processing groove 710, the contour positioning block 300 of this tooling will not be cut, thereby improving the service life of this application.

[0044] It should be noted that the machined grooves 710 on the seal 700 are evenly distributed. Therefore, after the seal 700 is installed on the contour positioning block 300, the position of the machined grooves 710 is determined based on the position of the clearance groove 350 when machining the grooves 710. The previous process will form a weld on the seal 700. To ensure product quality, the weld will be removed in this process. When installing the seal 700 on this application, the weld needs to be aligned with the clearance groove 350; thus, the weld can be removed when machining the grooves 710 by removing material.

[0045] Furthermore, the roughness of the conical surface 310 of the contour positioning block 300 is 0.8 micrometers to 1.6 micrometers; the roughness of the outer wall of the center locking member 200 is 0.8 micrometers to 1.6 micrometers. Specifically, this embodiment can reduce the friction between the center locking member 200 and the contour positioning block 300, thereby reducing the resistance when the two move relative to each other.

[0046] Furthermore, this application also includes a connecting shaft 600, which is connected to the side of the base plate 100 away from the central locking member 200. Specifically, in this embodiment, the connecting shaft 600 is used to clamp and fix the laser processing equipment.

[0047] Furthermore, the connecting shaft 600 is coaxially connected to the central locking member 200. Specifically, this embodiment ensures that the rotation axis of the laser processing equipment coincides with the axis of the sealing member 700, thereby improving processing accuracy.

[0048] Furthermore, the connecting shaft 600 includes a first shaft segment 610, an intermediate shaft segment 620, and a second shaft segment 630. The diameters of the first shaft segment 610 and the second shaft segment 630 are respectively smaller than the diameter of the intermediate shaft segment 620; the base plate 100 is provided with a connecting hole penetrating its thickness; the intermediate shaft segment 620 abuts against the side of the base plate 100 and is connected to the base plate 100; the second shaft segment 630 is located in the connecting hole and is connected to the central locking member 200. The first shaft segment 610 is clamped and fixed to the laser processing equipment.

[0049] Furthermore, the base plate 100 has a circular structure. Specifically, this prevents it from colliding with other components when rotating during laser processing.

[0050] This application relates to the positioning and clamping of thin-walled seals 700. The seal 700 is made of a high-temperature alloy and is formed by expansion molding. Only one application is needed to complete the positioning and clamping of the thin-walled seal 700, facilitating the removal of excess material from the seal 700.

[0051] The central locking member 200 applies force in the axial direction through the locking screw 500, thereby pressing the four contour positioning blocks 300 outward, so that the sealing member 700 is tightly attached to the outer wall of the contour positioning block 300. By continuing to adjust the locking screw 500 to continue applying force, the sealing member 700 is tightly clamped and fixed to this application.

[0052] The laser processing process is as follows:

[0053] 1. Clamping and positioning the sealing element 700: The sealing element 700 is installed on this application. Specifically, before installation, two second positioning blocks 330 are connected to the base plate 100, and the second positioning blocks 330 can slide in the oblong hole 110. First, the formed sealing element 700 is fitted onto the two second positioning blocks 330 (at this time, the second positioning blocks 330 are located at the extreme position near the center of the central locking member 200 in the oblong hole 110). Then, the two first positioning blocks 320 are installed in the oblong hole 110 of the base plate 100 respectively. Finally, the central locking member 200 is moved towards the base plate 100, so that the four positioning blocks are spread outward to form a contoured rotating body that conforms to the shape of the inner wall of the sealing element 700. This contoured rotating body abuts against the inner wall of the sealing element 700 to achieve clamping and positioning of the sealing element 700.

[0054] 2. Laser processing: Using a three-dimensional five-axis laser processing device, the seal is cut at 700° to remove material;

[0055] 3. Fitter: Grinding burrs and remelted layers from laser-processed areas;

[0056] 4. Inspection: Use calipers, coordinate measuring machines, profilometers, etc. to inspect the seals 700.

[0057] After the seal 700 is machined, this application can also be used as a tooling for auxiliary inspection.

[0058] Obviously, the above embodiments are merely illustrative examples for clear explanation and are not intended to limit the implementation. Those skilled in the art will recognize that other variations or modifications can be made based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. However, obvious variations or modifications derived therefrom are still within the protection scope of this invention.

Claims

1. A positioning and clamping tool for laser processing of a rotary thin-walled sealing element, characterized in that: include: Base plate; The central locking element has a conical structure; along the axial direction of the central locking element, the central locking element is slidably connected to the base plate; Multiple contour positioning blocks are spaced apart circumferentially on the outer side of the central locking member; the contour positioning blocks are slidably connected to one side of the base plate along the radial direction of the central locking member; the inner wall of the contour positioning block is provided with a conical surface, which cooperates with the outer wall of the central locking member; the central locking member moves toward the base plate to drive the contour positioning blocks to move radially outward.

2. The positioning and clamping fixture for laser processing of rotary thin-walled sealing components according to claim 1, characterized in that: There are four contour positioning blocks; the four contour positioning blocks are divided into two first positioning blocks and two second positioning blocks; the two first positioning blocks are symmetrically arranged; the two second positioning blocks are symmetrically arranged; the central angle of the second positioning block is larger than the central angle of the first positioning block.

3. The positioning and clamping tool for laser processing of thin-walled rotary seal according to claim 1, characterized in that: It also includes a connector; the base plate is provided with an oblong hole, which extends radially along the central locking member; the connector passes through the oblong hole and connects to the contour positioning block.

4. The positioning and clamping tool for laser processing of a thin-walled rotary seal according to claim 3, characterized in that: A slider is connected to one side of the contour positioning block, and the slider and the waist-shaped hole form a sliding pair.

5. The positioning and clamping tool for laser processing of thin-walled rotary seal according to claim 1, characterized in that: The central locking element is connected to the base plate by locking screws.

6. The positioning and clamping tool for laser processing of thin-walled rotary seal according to claim 1, characterized in that: The outer wall of the contour positioning block is provided with multiple clearance grooves at intervals; the sealing element removes material to form a processing groove; the clearance grooves correspond one-to-one with the processing grooves; the width of the clearance grooves is greater than the width of the processing grooves.

7. The positioning and clamping tool for laser processing of thin-walled rotary seal according to claim 1, characterized in that: The roughness of the conical surface of the contour positioning block is 0.8 micrometers to 1.6 micrometers; the roughness of the outer wall of the central locking component is 0.8 micrometers to 1.6 micrometers.

8. The positioning and clamping tool for laser processing of thin-walled rotary seal according to claim 1, characterized in that: It also includes a connecting shaft connected to the side of the base plate away from the central locking member.

9. The positioning and clamping tool for laser processing of thin-walled rotary seal according to claim 8, characterized in that: The connecting shaft is coaxially connected to the central locking member.

10. The positioning and clamping tool for laser processing of thin-walled rotary seal according to claim 1, characterized in that: The base plate has a circular structure.

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