Clamping device for cylindrical thin-wall part milling
By combining a support shaft, an elastic sleeve, and a conical top plate, the problem of deformation and displacement caused by unreliable clamping during the machining of cylindrical thin-walled parts is solved, achieving stable clamping and high-quality machining results.
Patent Information
- Application Number
- CN202423081927.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-13
- Publication Date
- 2025-11-21
- Estimated Expiration
- 2034-12-13
AI Technical Summary
Deformation and machining quality problems can occur in cylindrical thin-walled parts during processing due to insecure clamping, especially displacement under cutting forces, which affects dimensional accuracy and surface roughness.
The system employs a combined clamping structure consisting of a support shaft, an elastic sleeve, and a conical top plate. By tightening the thick nut, the elastic sleeve is opened and comes into close contact with the inner hole of the cylindrical thin-walled part. The uniform clamping force of the elastic sleeve and the limiting position of the boss prevent displacement.
It achieves stable clamping of cylindrical thin-walled parts during the machining process, avoiding deformation and displacement, and improving machining quality and accuracy.
Smart Images
Figure CN223572573U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of precision machining of thin-walled parts, specifically to a clamping device for milling cylindrical thin-walled parts. Background Technology
[0002] For cylindrical thin-walled parts that require machining long grooves on their outer diameter, the traditional method involves using a three-jaw chuck to support the hole at one end and a top plate to clamp it at the other end. After the top plate is clamped, the workpiece often deforms due to the clamping force and cutting force, affecting the dimensional accuracy, positional accuracy, and surface roughness of the part. In existing technology, the clamping of cylindrical thin-walled parts is achieved by using an elastic expansion sleeve to open and tightly contact and fix the part to the inner wall of the cylindrical thin-walled part. However, relying solely on the tension of the expansion sleeve is not reliable enough. In actual machining, the cutting force will offset some of the friction between the expansion sleeve and the cylindrical thin-walled part, causing the cylindrical thin-walled part to shift and affecting the machining quality. Summary of the Invention
[0003] To address the aforementioned problems, this utility model provides a clamping device and its usage method for milling cylindrical thin-walled parts. The clamping device has a simple structure, is easy to operate, effectively improves the processing efficiency of parts, and ensures the processing quality of parts.
[0004] To achieve the above objectives, the present invention adopts the following technical solution: a clamping device for milling cylindrical thin-walled parts, comprising a support shaft, an elastic sleeve, and a conical top plate. The support shaft is a stepped shaft, with a conical step at the front end and a threaded step at the rear end. The threaded step has a central hole at its end face. A long cylindrical step is provided between the conical step and the threaded step. The elastic sleeve abuts against the conical step and the conical top plate at both ends, respectively. The conical top plate is arranged opposite to the conical step. A through hole is opened in the center of the conical top plate, which mates with the long cylindrical step. The threaded step is threadedly connected to a thick nut. One end face of the thick nut abuts against the large end face of the conical top plate. Horizontal bosses are provided at both ends of the elastic sleeve.
[0005] The elastic sleeve has tapered holes at both ends with the inner diameter gradually decreasing from the outside to the inside. The angle of the tapered holes is the same as the angle of the tapered step and the angle of the tapered apex plate.
[0006] The elastic sleeve has at least two centrally symmetrical load-reducing grooves, with the openings of adjacent load-reducing grooves being opposite.
[0007] The end of the load reduction groove is circular.
[0008] A thick washer is provided between the thick nut and the conical top plate.
[0009] The beneficial effects of this utility model are as follows: Compared with the prior art, this utility model uses an elastic sleeve to support the cylindrical thin-walled part. By tightening the thick nut, the conical surface of the tapered step and the conical surface of the conical top plate open the elastic sleeve, so that the outer circle of the elastic sleeve is in close contact with the inner hole of the cylindrical thin-walled part and tightens the inner hole of the cylindrical thin-walled part. At this time, the clamping force on the cylindrical thin-walled part is distributed to the entire inner hole wall, which has good force and stability. The bosses at both ends of the elastic sleeve clamp the two ends of the cylindrical thin-walled part to limit the movement and prevent the cylindrical thin-walled part from being relatively displaced after being subjected to cutting force, thus affecting the processing quality. Attached Figure Description
[0010] The present invention will be further described below with reference to the accompanying drawings:
[0011] Fig. 1 This is an assembly diagram of the present invention;
[0012] Fig. 2 This is a schematic diagram of the support shaft of this utility model;
[0013] Fig. 3 This is a schematic diagram of the elastic sleeve of this utility model;
[0014] Fig. 4 This is a schematic diagram of the cone-shaped top plate of this utility model;
[0015] In the figure: 1. Support shaft; 11. Tapered step; 12. Threaded step; 13. Long cylindrical step; 2. Elastic sleeve; 21. Boss; 22. Tapered hole; 23. Load reduction groove; 3. Tapered top plate; 31. Through hole; 4. Thick nut; 5. Thick washer; 6. Cylindrical thin-walled part. Detailed Implementation
[0016] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments.
[0017] The technical solution of this utility model will be described in detail below with specific embodiments. The following specific embodiments can be selected to be combined or substituted with each other according to the actual situation, and the same or similar concepts or processes may not be described again in some embodiments. Example
[0018] like Figs. 1 to 4As shown, this utility model provides a clamping device for milling cylindrical thin-walled parts, including a support shaft 1, an elastic sleeve 2, and a conical top plate 3. The support shaft 1 is a stepped shaft with a conical step 11 at the front end and a threaded step 12 at the rear end. The end face of the threaded step 12 has a central hole. A long cylindrical step 13 is provided between the conical step 11 and the threaded step 12. The two ends of the elastic sleeve 2 abut against the conical step 11 and the conical top plate 3, respectively. The conical top plate 3 is arranged opposite to the conical step 11. A through hole 31 is opened in the center of the conical top plate 3, which mates with the long cylindrical step 13. The threaded step 12 is threadedly connected to a thick nut 4. One end face of the thick nut 4 abuts against the large end face of the conical top plate 3. The two ends of the elastic sleeve are provided with centrally symmetrical bosses 21.
[0019] Specifically, the elastic sleeve 2 has tapered holes 22 at both ends with the inner diameter gradually decreasing from the outside to the inside. The angle of the tapered holes 22 is the same as the angle of the tapered step 11 and the angle of the tapered apex plate 3.
[0020] In use, the cylindrical thin-walled part 6 is fitted onto the elastic sleeve 2. By tightening the thick nut 4, the conical top plate 3 is squeezed. Since the inner diameter of the conical hole 22 at both ends of the elastic sleeve 2 gradually decreases from the outside to the inside, the conical surface of the conical step 11 and the conical surface of the conical top plate 3 squeeze the elastic sleeve 2 and open it. Thus, the bosses 21 at both ends of the elastic sleeve 2 hold the two ends of the cylindrical thin-walled part 6. The outer circle of the elastic sleeve 2 contacts the inner hole of the cylindrical thin-walled part 6 and tightens the inner hole. The clamping force on the cylindrical thin-walled part 6 is distributed to the entire inner hole wall, and the force is uniform and stable, ensuring that the cylindrical thin-walled part 6 is basically undeformed after milling.
[0021] Specifically, in order to reduce stress concentration, the elastic sleeve 2 has at least two centrally symmetrical load-reducing grooves 23 with opposite openings and the ends of the load-reducing grooves 23 are rounded. The openings of the adjacent load-reducing grooves 23 are respectively located on the left and right sides of the elastic sleeve 2 to ensure the elasticity of the elastic sleeve 2, so as to facilitate contraction and loosening. The ends of the load-reducing grooves 23 are rounded to avoid stress concentration or damage that may be caused by sharp edges or corners.
[0022] Specifically, a thick washer 5 is provided between the thick nut 4 and the conical top plate 3. The thick washer 5 is used to prevent the thick nut 4 from directly pressing the conical top plate 3 and to increase the contact area with the conical top plate 3, effectively dispersing and reducing the pressure generated at the connection.
[0023] In addition to the preferred embodiments described above, there are other embodiments of this utility model. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection claimed by this utility model.
Claims
1. A clamping device for milling cylindrical thin-walled parts, characterized in that, The device includes a support shaft (1), an elastic sleeve (2), and a conical top plate (3). The support shaft (1) is a stepped shaft. The front end of the support shaft (1) is provided with a conical step (11), and the rear end is provided with a threaded step (12). The end face of the threaded step (12) is provided with a central hole. A long cylindrical step (13) is provided between the conical step (11) and the threaded step (12). The two ends of the elastic sleeve (2) abut against the conical step (11) and the conical top plate (3) respectively. The conical top plate (3) is arranged opposite to the conical step (11). A through hole (31) is opened in the center of the conical top plate (3). The through hole (31) is engaged with the long cylindrical step (13). The threaded step (12) is threadedly connected to a thick nut (4). One end face of the thick nut (4) abuts against the large end face of the conical top plate (3). The two ends of the elastic sleeve are provided with bosses (21) symmetrical along the center.
2. The clamping device for milling cylindrical thin-walled parts according to claim 1, characterized in that, The elastic sleeve (2) has tapered holes (22) with an inner diameter that gradually decreases from the outside to the inside at both ends. The angle of the tapered hole (22) is the same as the angle of the tapered step (11) and the angle of the tapered top plate (3).
3. The clamping device for milling cylindrical thin-walled parts according to claim 1, characterized in that, The elastic sleeve (2) has at least two centrally symmetrical load-reducing grooves (23), with the openings of adjacent load-reducing grooves (23) being opposite.
4. The clamping device for milling cylindrical thin-walled parts according to claim 3, characterized in that, The end of the load reduction groove (23) is closed in a circular shape.
5. A clamping device for milling cylindrical thin-walled parts according to claim 1, characterized in that, A thick washer (5) is provided between the thick nut (4) and the conical top plate (3).