Tool clamp for lathing curved surface contour of impeller
By using a spring clip and the tapered section of the guide sleeve's central hole to clamp the impeller shaft, and using a locking screw to prevent rotation, the problem of fixture instability during impeller machining is solved, thus improving machining accuracy and positional stability.
Patent Information
- Application Number
- CN202423281456.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-30
- Publication Date
- 2025-12-09
- Estimated Expiration
- 2034-12-30
AI Technical Summary
During the machining of the impeller curved surface profile, existing tooling fixtures are difficult to effectively clamp the impeller, resulting in low machining accuracy and easy detachment and displacement.
The impeller shaft is clamped and fixed by a spring clip and a tapered section of the center hole of the guide sleeve, and the spring clip is prevented from rotating by a locking screw. The impeller is stably positioned by a positioning support block.
This achieves secure clamping of the impeller and stable machining position, improving machining accuracy and avoiding problems of detachment and rotation during machining.
Smart Images
Figure CN223643248U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of accessories for impeller machining, and in particular to a tooling fixture for machining the curved surface contour of an impeller. Background Technology
[0002] The impeller is an important component in automobiles that increases engine power and reduces exhaust emissions. Its basic structure is as follows: Figure 1 As shown, the impeller includes a turntable 11 with blades 12 evenly distributed circumferentially on its surface. A rotating shaft 13 is located at the center of the turntable 11. The height of the curved profile of the blades 12 from the vacuum-cast blank affects the intake volume of the turbocharger; therefore, the curved profile of the blades 12 is a very important dimension with high machining accuracy requirements. Thus, a tooling fixture needs to be developed to clamp and securely position the impeller during machining, preventing issues such as detachment, displacement, or rotation that could affect machining accuracy. Utility Model Content
[0003] The purpose of this invention is to provide a tooling fixture for machining the curved surface profile of an impeller.
[0004] The innovation of this utility model is as follows: This application uses the tapered hole section of the central sleeve hole of the spring sleeve and the guide sleeve to clamp and fix the impeller shaft, and the clamping structure is firm; the locking screw is used to prevent the spring sleeve from rotating, ensuring the stability of the processing position of the impeller.
[0005] To achieve the above-mentioned objectives, the technical solution of this utility model is as follows:
[0006] A tooling fixture for machining the curved surface profile of an impeller includes a guide sleeve, one end of which is connected to a transition flange sleeve and the other end to a positioning ring. A spring clip is provided inside the guide sleeve, one end of which is open and the other end is closed. The open end is located on the side near the positioning ring, and a clamping hole is provided at the center of the open end. A threaded rod is provided on the closed end, and the threaded rod is connected to an adjusting nut located inside the transition flange sleeve. The positioning ring, guide sleeve, and spring clip are coaxial, and the diameter of the clamping hole at the center of the spring clip is slightly smaller than the diameter of the impeller shaft.
[0007] Furthermore, the diameter of the central through hole of the positioning ring is slightly larger than the diameter of the central sleeve hole of the guide sleeve, and a number of positioning support blocks corresponding to the impeller blades are evenly distributed along the circumferential direction on the surface of the positioning ring, and the positioning support blocks are disposed between two adjacent blades.
[0008] Furthermore, the guide sleeve center hole includes a straight hole section and a tapered hole section. The tapered hole section is closer to the positioning ring, and the straight hole section is closer to the transition flange sleeve. The tapered hole section has a larger opening at the end closer to the positioning ring and a smaller opening at the end farther from the positioning ring.
[0009] Furthermore, a locking screw is provided on one side of the spring clip, and the locking screw passes through the guide sleeve and is screwed into the anti-rotation groove on the outer wall of the spring clip.
[0010] Furthermore, the positioning ring and the guide sleeve, as well as the guide sleeve and the transition flange sleeve, are all connected by screws.
[0011] The beneficial effects of this utility model are:
[0012] First: This application uses clamping holes to clamp the impeller shaft, uses the tapered section of the central sleeve hole to further clamp the shaft, and uses positioning support blocks to hold the turntable in place, thus further fixing the impeller securely.
[0013] Second: Locking screws are used to lock the spring collet to prevent it from rotating during machining, thereby further improving the clamping firmness and the stability of the machining position.
[0014] Third: The positioning support block is a consumable part. The positioning ring and the guide sleeve are connected by screws. The detachable connection structure makes it easy to replace the positioning ring. Attached Figure Description
[0015] Figure 1 This is a schematic diagram of the impeller structure.
[0016] Figure 2 This is a schematic diagram of the structure of this utility model.
[0017] Figure 3 This is a schematic diagram of the assembly structure of the present invention and the impeller.
[0018] In the diagram: 10 is the impeller, 11 is the turntable, 12 is the blade, 13 is the shaft, 20 is the guide sleeve, 20.1 is the center sleeve hole, 20.1a is the straight hole section, 20.1b is the tapered hole section, 21 is the transition flange sleeve, 22 is the positioning ring, 22.1 is the positioning support block, 23 is the spring clip, 23.1 is the clamping hole, 23.2 is the threaded rod, 24 is the adjusting nut, 25 is the locking screw, and 26 is the screw. Detailed Implementation
[0019] The technical solutions in the embodiments of this utility model will now be clearly and completely described with reference to the accompanying drawings.
[0020] A tooling fixture for machining the curved surface profile of an impeller includes a guide sleeve 20, one end of which is connected to a transition flange sleeve 21, and the other end is connected to a positioning ring 22. A spring clip 23 is provided inside the guide sleeve 20, one end of which is open and the other end is closed. The open end is located on the side near the positioning ring 22, and a clamping hole 23.1 is provided at the center of the open end. A threaded rod 23.2 is provided on the closed end, and the threaded rod 23.2 is connected to an adjusting nut 24 located inside the transition flange sleeve 21. The positioning ring 22, the guide sleeve 20, and the spring clip 23 are coaxial, and the diameter of the clamping hole 23.1 at the center of the spring clip 23 is slightly smaller than the diameter of the impeller shaft 13.
[0021] Furthermore, the diameter of the central through hole of the positioning ring 22 is slightly larger than the diameter of the central sleeve hole 20.1 of the guide sleeve 20. Several positioning support blocks 22.1 corresponding to the blades 12 of the impeller 10 are evenly distributed along the circumferential direction on the surface of the positioning ring 22. The positioning support blocks 22.1 are arranged between two adjacent blades 12.
[0022] Furthermore, the center sleeve hole 20.1 of the guide sleeve 20 includes a straight hole section 20.1a and a tapered hole section 20.1b. The tapered hole section 20.1b is closer to the positioning ring 22, and the straight hole section 20.1a is closer to the transition flange sleeve 21. The tapered hole section 20.1b has a larger opening at the end closer to the positioning ring 22 and a smaller opening at the end farther away from the positioning ring 22.
[0023] Furthermore, a locking screw 25 is provided on one side of the spring clip 23. The locking screw 25 passes through the guide sleeve 20 and is screwed into the anti-rotation groove (not shown in the figure) on the outer wall of the spring clip 23.
[0024] Furthermore, the positioning ring 22 and the guide sleeve 20, and the guide sleeve 20 and the transition flange sleeve 21 are both connected by screws 26.
[0025] How to use this application:
[0026] Connect the transition flange sleeve 21 to the machining center, and connect the other end of the adjusting nut 24 to the telescopic device. The telescopic device extends, pushing the spring sleeve 23 to extend. The clamping hole 23.1 locks the rotating shaft 13 of the impeller 10, and the positioning support block 22.1 abuts against the turntable 11 of the impeller 10. The telescopic device retracts, pulling the spring sleeve 23 and the impeller 10 back together. Since the front section of the central sleeve hole 20.1 of the guide sleeve 20 is a tapered hole section 20.1b, the spring sleeve 23 gradually tightens when it retracts, clamping the rotating shaft 13. Finally, the locking screw 25 is screwed into the anti-rotation groove on the outer wall of the spring sleeve 23 to prevent the spring sleeve 23 from rotating during the machining process.
[0027] The described embodiments are merely some, not all, of the embodiments of this utility model. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without inventive effort are within the scope of protection of this utility model.
Claims
1. A tooling fixture for machining the curved surface profile of an impeller, characterized in that: The system includes a guide sleeve (20), one end of which is connected to a transition flange sleeve (21) and the other end is connected to a positioning ring (22). A spring clip (23) is provided in the inner cavity of the guide sleeve (20). One end of the spring clip (23) is open and the other end is closed. The open end is located on the side close to the positioning ring (22). A clamping hole (23.1) is provided in the center of the open end. A threaded rod (23.2) is provided on the closed end. The threaded rod (23.2) is connected to an adjusting nut (24) located in the inner cavity of the transition flange sleeve (21). The positioning ring (22), the guide sleeve (20), and the spring clip (23) are coaxial. The diameter of the clamping hole (23.1) in the center of the spring clip (23) is slightly smaller than the diameter of the impeller (10) shaft (13).
2. The tooling fixture for machining the curved surface profile of an impeller according to claim 1, characterized in that: The diameter of the central through hole of the positioning ring (22) is slightly larger than the diameter of the central sleeve hole (20.1) of the guide sleeve (20). The surface of the positioning ring (22) is also evenly distributed with a number of positioning support blocks (22.1) corresponding to the blades (12) of the impeller (10) along the circumferential direction. The positioning support blocks (22.1) are arranged between two adjacent blades (12).
3. The tooling fixture for machining the curved surface profile of an impeller according to claim 2, characterized in that: The guide sleeve (20) center sleeve hole (20.1) includes a straight hole section (20.1a) and a tapered hole section (20.1b). The tapered hole section (20.1b) is closer to the positioning ring (22), and the straight hole section (20.1a) is closer to the transition flange sleeve (21). The tapered hole section (20.1b) has a larger opening at the end closer to the positioning ring (22) and a smaller opening at the end farther away from the positioning ring (22).
4. The tooling fixture for machining the curved surface profile of an impeller according to claim 1, characterized in that: A locking screw (25) is also provided on one side of the spring clip (23). The locking screw (25) passes through the guide sleeve (20) and is screwed into the anti-rotation groove on the outer wall of the spring clip (23).
5. The tooling fixture for machining the curved surface profile of an impeller according to claim 1, characterized in that: The positioning ring (22) and the guide sleeve (20), and the guide sleeve (20) and the transition flange sleeve (21) are both connected by screws (26).