Multi-station quick positioning fixture for impeller cutting

Abstract

The utility model relates to the field of vane clamp especially, more multi -position quick positioning fixture for vane cutting process, technical scheme: a multi -position quick positioning fixture for vane cutting process, including the locating disc and the bearing box, the locating disc upper end is installed and plays the vane inner ring positioning and clamping structure of self -regulation function, the bearing box is installed in the servo drive structure, and the upper end of bearing bracket is installed six groups of the locating disc that is symmetrical distribution before and after through the base, the utility model adopts the cooperation design of extruding head and four symmetrical clamping blocks, has realized the self -adaptive clamping of different size vane inner ring, and has the positioning precision and versatility, six groups of the locating disc design that is symmetrical distribution before and after, and cooperate servo screw rod structure can handle multiple vane simultaneously, has improved the processing efficiency remarkably, solved the problem that the existing vane positioning fixture is difficult to carry out the automatic adjustment according to the different vane specifications, and single -station clamp processing efficiency is lower.

Description

Technical Field

[0001] This utility model belongs to the field of impeller fixtures, specifically relating to a multi-station rapid positioning fixture for impeller cutting. Background Technology

[0002] As a core component of fluid machinery such as turbines, pumps, and compressors, the machining accuracy of impellers directly determines the operating efficiency, energy consumption, and stability of the equipment. Impeller fixtures, as key auxiliary equipment for impeller cutting, grinding, and inspection processes, undertake three core functions: precise positioning, stable clamping, and workpiece protection. They are the foundation for ensuring impeller machining quality and production efficiency.

[0003] In existing technologies, during impeller machining processes such as blade milling, inner ring finishing, and end face cutting, traditional positioning fixtures often require switching between different fixture specifications depending on the impeller's dimensions. In practical use, traditional fixtures necessitate disassembly and replacement of positioning blocks and adjustment of bolt positions, resulting in lengthy changeover times and significant production disruptions. Furthermore, traditional single-station fixtures must follow a sequential process of "loading-clamping-machining-unloading," requiring the machining equipment to be stopped during loading and unloading, leading to prolonged idle time and insufficient capacity to meet mass production demands. Therefore, this invention proposes a multi-station rapid positioning fixture for impeller machining to address the problems existing in the prior art. Utility Model Content

[0004] To overcome the problems of existing impeller positioning fixtures being unable to automatically adjust according to different impeller specifications and the low processing efficiency of single-station fixtures.

[0005] The technical solution of this utility model is as follows: a multi-station rapid positioning fixture for impeller cutting, comprising a positioning plate and a bearing box. The upper end of the positioning plate is equipped with an impeller inner ring positioning and clamping structure that plays a self-adjusting role. A servo transmission structure is installed inside the bearing box. The upper end of the bearing bracket is equipped with six sets of positioning plates symmetrically distributed front and back through a base. A lead screw nut is fixedly connected to the center of the lower end of the bearing bracket. Sliding sleeves are fixedly connected to the left and right sides of the lead screw nut. A top plate is installed on the upper inner wall of the bearing box. The impeller body is provided on the impeller inner ring positioning and clamping structure.

[0006] As a preferred embodiment, the impeller inner ring positioning and clamping structure includes a positioning post installed at the center of the upper end of the positioning disk, a clamping block set inside the positioning post, and an electric cylinder. The upper and lower ends of the positioning disk are provided with a lower mounting groove, the lower end of the positioning post is provided with an upper mounting groove, and the outer wall of the upper mounting groove is provided with four sets of first grooves that surround the positioning post and are equidistantly distributed. The upper and lower ends of the first grooves are provided with second grooves.

[0007] Preferably, the bottom of the electric cylinder is installed in the lower mounting groove, the top of the electric cylinder is installed in the upper mounting groove, and a pressing head is installed on the output end of the electric cylinder; extension blocks are fixed to the upper and lower ends of the clamping block, and a return spring is installed at one end of the extension block near the outer wall of the positioning column, and the other end of the return spring is installed in the second groove.

[0008] Preferably, the outer wall of the clamping block is in contact with the inner wall of the first groove, the outer wall of the extension block is in contact with the inner wall of the second groove, the outer wall of the extrusion head is in contact with the upper mounting groove and one end of the four sets of clamping blocks, and a silicone pad is installed on the other end surface of the four sets of clamping blocks.

[0009] Preferably, the servo drive structure includes a lead screw body rotatably mounted in the center of the bearing box and a servo motor mounted in the center of the rear end of the bearing box. The output end of the servo motor passes through the rear end of the bearing box and is connected to the rear end of the lead screw body. The lead screw body is adapted to the lead screw nut.

[0010] Preferably, the inner walls of the front and rear ends of the bearing box are fixedly connected to guide rails distributed on the left and right sides of the lead screw body, and the left and right ends of the lead screw nut are fixedly connected to sliding sleeves, which are adapted to the guide rails.

[0011] Preferably, a sliding groove is provided through the center of the upper and lower ends of the top plate, the screw nut passes through the sliding groove and is located on the inner wall of the bearing box and is adapted to the sliding groove, the lower end of the bearing bracket is in contact with the upper end of the top plate, and the bearing bracket is H-shaped and corresponds to the sliding groove.

[0012] The beneficial effects of this utility model are: 1. By adopting the combination design of extrusion head and four sets of symmetrical clamping blocks, adaptive clamping of impeller inner rings of different sizes is achieved, which has both positioning accuracy and versatility; 2. With the design of six sets of positioning discs symmetrically distributed front and back, combined with the servo screw structure, multiple impellers can be processed simultaneously, significantly improving processing efficiency. Attached Figure Description

[0013] Figure 1 The diagram shown is a three-dimensional structural schematic of the multi-station rapid positioning fixture for impeller cutting of this utility model. Figure 2 The diagram shown is a three-dimensional disassembled view of the multi-station rapid positioning fixture for impeller cutting of this utility model. Figure 3 The diagram shown is a first three-dimensional structural disassembly of the carrier box, top plate and servo structure of the multi-station rapid positioning fixture for impeller cutting of this utility model. Figure 4 The diagram shown is a second three-dimensional disassembled view of the carrier box, top plate and servo structure of the multi-station rapid positioning fixture for impeller cutting of this utility model. Figure 5 The diagram shows a three-dimensional structural schematic of the positioning disk, impeller body, and impeller inner ring positioning and clamping structure of the multi-station rapid positioning fixture for impeller cutting of this utility model. Figure 6 The diagram shows a three-dimensional structural schematic of the positioning column of the multi-station rapid positioning fixture for impeller cutting of this utility model. Figure 7 The diagram shows a three-dimensional structural schematic of the clamping block of the multi-station rapid positioning fixture for impeller cutting of this utility model.

[0014] Explanation of reference numerals in the attached drawings: 1-Carrier box, 2-Top plate, 3-Carrier bracket, 4-Positioning plate, 5-Impeller body, 6-Screw body, 7-Servo motor, 8-Guide rail, 9-Slide groove, 10-Screw nut, 11-Sliding sleeve, 12-Base, 13-Lower mounting groove, 14-Electric cylinder, 15-Extrusion head, 16-Clamping block, 17-Positioning column, 18-Upper mounting groove, 19-First groove, 20-Second groove, 21-Silicone pad, 22-Extension block, 23-Reset spring. Detailed Implementation

[0015] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0016] Please see Figures 1-7 This utility model provides an embodiment: a multi-station rapid positioning fixture for impeller cutting, including a positioning disk 4 and a bearing box 1. The upper end of the positioning disk 4 is equipped with an impeller inner ring positioning clamping structure that plays a self-adjusting role. The bearing box 1 is equipped with a servo transmission structure. The upper end of the bearing bracket 3 is equipped with six sets of positioning disks 4 that are symmetrically distributed front and back through the base 12. The lower end of the bearing bracket 3 is fixedly connected to the center of the screw nut 10. The left and right sides of the screw nut 10 are fixedly connected to the sliding sleeve 11. The upper inner wall of the bearing box 1 is equipped with a top plate 2. The impeller body 5 is provided on the impeller inner ring positioning clamping structure.

[0017] By adopting the combination design of extrusion head 15 and four sets of symmetrical clamping blocks 16, adaptive clamping of impeller inner rings of different sizes is achieved, which has both positioning accuracy and versatility. The design of six sets of positioning disks 4 distributed symmetrically front and back, together with the servo screw structure, can process multiple impellers at the same time, which significantly improves processing efficiency.

[0018] Please see Figures 5-7In this embodiment, the impeller inner ring positioning and clamping structure includes a positioning post 17 installed at the center of the upper end of the positioning disk 4, a clamping block 16 disposed within the positioning post 17, and an electric cylinder 14. A lower mounting groove 13 is formed through the center of both the upper and lower ends of the positioning disk 4. An upper mounting groove 18 is formed at the lower end of the positioning post 17. Four sets of first grooves 19, equidistantly distributed around the positioning post 17, are formed through the outer wall of the upper mounting groove 18. Second grooves 20 are formed at the upper and lower ends of the first grooves 19. The combination of the positioning post 17 and the four symmetrically distributed clamping blocks 16 enables uniform clamping of the impeller inner ring at multiple points, ensuring positioning accuracy. The bottom of the electric cylinder 14 is installed within the lower mounting groove 13, and the top of the electric cylinder 14 is installed within the upper mounting groove 18. A pressing head 15 is installed on the output end of the electric cylinder 14. Extension blocks 22 are fixedly connected to both the upper and lower ends of the clamping block 16. A return spring 23 is installed at the end of the extension block 22 closest to the outer wall of the positioning post 17. One end of the return spring 23 is installed in the second groove 20. The design of the extrusion head 15 and the clamping block 16 converts the linear motion of the electric cylinder 14 into the radial expansion and contraction motion of the clamping block 16, realizing automated clamping. At the same time, the combination structure of the extension block 22 and the return spring 23 can automatically reset the clamping block 16 when the electric cylinder 14 is released, ensuring the accuracy of the next clamping. The outer wall of the clamping block 16 fits against the inner wall of the first groove 19, and the extension block 22... The outer wall of the extrusion head 15 is in contact with the inner wall of the second groove 20. The outer wall of the extrusion head 15 is in contact with one end of the upper mounting groove 18 and the four sets of clamping blocks 16. The other end of the four sets of clamping blocks 16 is equipped with a silicone pad 21. The multi-faceted contact design of the extrusion head 15 with the upper mounting groove 18 and the clamping blocks 16 makes the force transmission more uniform and reduces local stress concentration. The silicone pad 21 increases the friction with the inner ring of the impeller to prevent slippage and also buffers the clamping force to avoid damaging the impeller surface.

[0019] Please see Figure 4 In this embodiment, the servo transmission structure includes a lead screw body 6 rotatably mounted in the center of the bearing box 1 and a servo motor 7 mounted in the center of the rear end of the bearing box 1. The output end of the servo motor 7 passes through the rear end of the bearing box 1 and connects to the rear end of the lead screw body 6. The lead screw body 6 is adapted to the lead screw nut 10. The precise fit between the lead screw body 6 and the lead screw nut 10 can realize high-precision position control of the bearing bracket 3, meet the requirements of processing station switching. The entire transmission structure is enclosed in the bearing box 1, which can avoid the contamination of cutting chips and improve the service life of the equipment.

[0020] Please see Figures 3-4In this embodiment, guide rails 8 distributed on the left and right sides of the lead screw body 6 are fixed to the inner walls of the front and rear ends of the bearing box 1. Sliding sleeves 11 are fixed to the left and right ends of the lead screw nut 10. The sliding sleeves 11 are adapted to the guide rails 8. The symmetrical design of the guide rails 8 provides double-sided support for the bearing bracket 3, avoiding tilting during movement. The precise cooperation between the sliding sleeves 11 and the guide rails 8 ensures the guiding accuracy of the linear movement of the bearing bracket 3. The center of the upper and lower ends of the top plate 2 is provided with a sliding groove 9. The lead screw nut 10 passes through the sliding groove 9 and is located on the inner wall of the bearing box 1 and is adapted to the sliding groove 9. The lower end of the bearing bracket 3 is in contact with the upper end of the top plate 2. The bearing bracket 3 is H-shaped and corresponds to the sliding groove 9. The H-shaped bearing bracket 3 design reduces weight while ensuring structural strength. The corresponding relationship between the bearing bracket 3 and the sliding groove 9 ensures the synchronous movement and positional consistency of the multi-station positioning disk 4.

[0021] When in use, first place the impeller body 5 that needs to be cut on the positioning post 17 of the positioning plate 4, and then fit the inner ring of the impeller into the outer periphery of the positioning post 17. Then, start the electric cylinder 14 and push the extrusion head 15 upward. The extrusion head 15 extrudes the four sets of clamping blocks 16, causing them to expand outward along the first groove 19. At this time, the clamping block 16 is in close contact with the inner ring of the impeller through the silicone pad 21 to achieve positioning and clamping, while the extension block 22 moves synchronously with the clamping block 16, so that the return spring 23 is in a stretched state. The servo motor 7 starts and drives the lead screw body 6 to rotate, so that the lead screw nut 10 moves linearly on the lead screw body 6 and drives the bearing bracket 3 to move. At the same time, the sliding sleeve 11 slides along the guide rail 8 to ensure smooth movement, while the bearing bracket 3 moves along the slide groove 9 of the top plate 2 to transport the impeller to the designated processing position. Once the impeller reaches the machining position, the machining equipment performs cutting machining on the impeller; After processing, the electric cylinder 14 retracts, driving the extrusion head 15 to reset. The reset spring 23 rebounds, pulling the extension block 22 and the clamping block 16 back. The clamping block 16 separates from the inner ring of the impeller, and the processed impeller is removed.

[0022] Through the above steps, the design of the extrusion head 15 and four sets of symmetrical clamping blocks 16 is adopted to achieve adaptive clamping of impeller inner rings of different sizes, which has both positioning accuracy and versatility. The design of six sets of positioning disks 4 distributed symmetrically front and back, together with the servo screw structure, can process multiple impellers at the same time, which significantly improves the processing efficiency and solves the problem that the existing impeller positioning fixtures are difficult to automatically adjust according to different impeller specifications and the single-station fixtures have low processing efficiency.

[0023] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present invention.

Claims

1. A multi-station rapid positioning fixture for impeller cutting, comprising a positioning disk (4) and a bearing box (1), characterized in that: The upper end of the positioning plate (4) is equipped with an impeller inner ring positioning clamping structure that plays a self-adjusting role. The bearing box (1) is equipped with a servo transmission structure. The upper end of the bearing bracket (3) is equipped with six sets of positioning plates (4) that are symmetrically distributed front and back through the base (12). The lower end of the bearing bracket (3) is fixedly connected to the center of the screw nut (10). The left and right sides of the screw nut (10) are fixedly connected to the sliding sleeve (11). The upper inner wall of the bearing box (1) is equipped with a top plate (2). The impeller body (5) is set on the impeller inner ring positioning clamping structure.

2. The multi-station rapid positioning fixture for impeller cutting according to claim 1, characterized in that: The impeller inner ring positioning and clamping structure includes a positioning column (17) installed at the center of the upper end of the positioning disk (4), a clamping block (16) set in the positioning column (17), and an electric cylinder (14). The upper and lower ends of the positioning disk (4) are provided with a lower mounting groove (13), the lower end of the positioning column (17) is provided with an upper mounting groove (18), and the outer wall of the upper mounting groove (18) is provided with four sets of first grooves (19) that surround the positioning column (17) and are equidistantly distributed. The upper and lower ends of the first grooves (19) are provided with second grooves (20).

3. The multi-station rapid positioning fixture for impeller cutting according to claim 2, characterized in that: The bottom of the electric cylinder (14) is installed in the lower mounting groove (13), the top of the electric cylinder (14) is installed in the upper mounting groove (18), and the output end of the electric cylinder (14) is equipped with a pressing head (15); the upper and lower ends of the clamping block (16) are fixedly connected with extension blocks (22), and one end of the return spring (23) is installed on one end of the extension block (22) near the outer wall of the positioning post (17), and the other end of the return spring (23) is installed in the second groove (20).

4. The multi-station rapid positioning fixture for impeller cutting according to claim 3, characterized in that: The outer wall of the clamping block (16) is in contact with the inner wall of the first groove (19), the outer wall of the extension block (22) is in contact with the inner wall of the second groove (20), the outer wall of the extrusion head (15) is in contact with the upper mounting groove (18) and one end of the four sets of clamping blocks (16), and a silicone pad (21) is installed on the other end of the four sets of clamping blocks (16).

5. The multi-station rapid positioning fixture for impeller cutting according to claim 1, characterized in that: The servo drive structure includes a lead screw body (6) rotatably installed in the center of the bearing box (1) and a servo motor (7) installed in the center of the rear end of the bearing box (1). The output end of the servo motor (7) passes through the rear end of the bearing box (1) and is connected to the rear end of the lead screw body (6). The lead screw body (6) is adapted to the lead screw nut (10).

6. The multi-station rapid positioning fixture for impeller cutting according to claim 1, characterized in that: The inner walls of the front and rear ends of the bearing box (1) are fixed with guide rails (8) distributed on the left and right sides of the screw body (6), and the left and right ends of the screw nut (10) are fixed with sliding sleeves (11), which are adapted to the guide rails (8).

7. The multi-station quick positioning fixture for cutting impeller according to claim 1, characterized in that: The top plate (2) has a sliding groove (9) through the center of the upper and lower ends. The screw nut (10) passes through the sliding groove (9) and is located on the inner wall of the bearing box (1) and is compatible with the sliding groove (9). The lower end of the bearing bracket (3) is in contact with the upper end of the top plate (2). The bearing bracket (3) is H-shaped and corresponds to the sliding groove (9).

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