Device for reducing rotation jumping of micro round pipe

Abstract

The utility model relates to the field of auxiliary work fixtures, and discloses a device for reducing rotation runout of a micro round tube, which comprises a frame and a fastener, a rotating shaft is rotatably mounted on the frame, a frame body is sleeved on the outer side of the rotating shaft, one end of the frame body is fixedly connected with the frame, and a detachable guider is mounted at the other end of the frame body; a through hole and a first connecting hole are formed in the frame body, a center hole and a second connecting hole are formed in the guider, a gap is formed between the outer side face of the pipe fitting and the inner wall of the center hole, and under the condition that the guider is not completely fixed, the rotating shaft drives the pipe fitting to rotate so that the inner wall of the center hole can make contact with the surface of the pipe fitting. When a pipe fitting rotates, the position of the guider can be automatically adjusted up, down, left and right under the generated contact force, the guider finally reaches the position with the minimum contact force, then the guider is completely fixed to the frame body, under the constraint effect of the guider, the radial run-out error of the pipe fitting in the rotating process cannot exceed the size of a gap, and then the run-out error of the pipe fitting is effectively reduced.

Description

Technical Field

[0001] The utility model relates to the field of auxiliary tooling fixtures, in particular to a device for reducing the rotational vibration of a micro-circular tube. Background Art

[0002] Surface structured and micro-textured metal pipes are widely used in aerospace, biomedicine and other fields. For example, in aircraft fuel delivery systems and hydraulic systems, surface structured and micro-textured pipes can improve fuel delivery efficiency and reduce the weight and volume of the system. At the same time, under the extreme conditions of the aerospace environment, such as high temperature, high pressure and high vibration, the enhanced fatigue resistance and corrosion resistance of these pipes can effectively ensure the safety and reliability of the system.

[0003] Since the pipe is a rotating surface, in order to achieve the machining of the entire surface precision structure, it needs to rotate around the axis at a certain speed during the machining process. However, due to the radial runout error of the rotating axis itself and the installation error of the metal pipe, the workpiece surface will inevitably produce radial runout during the rotation process, resulting in an unstable relative distance between the workpiece and the machining tool, resulting in reduced machining accuracy and stability, or even machining failure.

[0004] In particular, when the diameter of the metal tube is very small, its radial runout error during rotation has a particularly serious impact on the processing results. Therefore, how to improve the rotational runout error of metal tubes, especially those with small diameters, is of great significance for improving the processing accuracy and processing stability of their surface structures. Utility Model Content

[0005] The purpose of the utility model is to overcome the deficiencies in the prior art and provide a device for reducing the rotational runout of a micro-circular tube, which reduces the radial runout error during the rotation of a tube driven by a common precision shaft with a low-cost, highly flexible mechanical structure.

[0006] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0007] A device for reducing the rotational vibration of a micro-circular tube comprises a frame and a fastener. A rotating shaft is rotatably mounted on the frame. An inner hole for mounting a tube is formed inside the rotating shaft. A frame is sleeved on the outer side of the rotating shaft. One end of the frame is fixedly connected to the frame, and the other end is mounted with a detachable guide.

[0008] The frame body is provided with a through hole and a first connecting hole, and the guide is provided with a central hole and a second connecting hole; the inner diameter of the second connecting hole is larger than the inner diameter of the first connecting hole, the inner diameter of the first connecting hole is the same as the outer diameter of the fastener, and one end of the fastener passes through the second connecting hole and is embedded in the first connecting hole;

[0009] One end of the pipe passes through the central hole and the through hole and is fixedly installed in the inner hole, and a gap is provided between the outer circumferential surface of the pipe and the inner wall of the central hole.

[0010] Optionally, one end of the rotating shaft opposite to the frame is located inside the frame body, and the inner hole and the through hole are both coaxial with the rotating shaft.

[0011] Optionally, a plurality of the first connecting holes and the second connecting holes are provided, the former are distributed in a circular array around the axis of the rotating shaft on the circumferential side of the through hole, and the latter are distributed in a circular array around the axis of the central hole.

[0012] Optionally, the frame includes a supporting portion, and both ends of the supporting portion are respectively provided with a connecting portion and a mounting portion, and the connecting portion is fixedly connected to the frame, and the guide is provided on the mounting portion.

[0013] Optionally, the connecting portion adopts a flange structure, a boss corresponding to the connecting portion is provided on the frame, and the boss is fixedly connected to the connecting portion.

[0014] Optionally, the mounting portion is provided with a mounting groove for placing the guide, and the through hole and the first connecting hole are both located in the mounting groove.

[0015] Optionally, a notch is provided on the side of the mounting groove, and the side end of the guide extends through the notch to the outside of the mounting groove.

[0016] Optionally, a chuck for fixing the pipe is installed at the end of the rotating shaft, and the chuck is sleeved on the outside of the pipe.

[0017] Beneficial effects:

[0018] (1) The inner diameter of the second connecting hole is larger than the outer diameter of the fastener. When the guide is not completely fixed, the shaft drives the pipe to rotate so that the inner wall of the center hole contacts the surface of the pipe. The contact force generated will automatically adjust the position of the guide up and down and left and right, and finally reach a position with the minimum contact force. Then, the fastener is tightened to completely fix the guide on the frame. Due to the restraining effect of the guide, the radial runout error of the pipe during the rotation process will not exceed the size of the gap, thereby effectively reducing its runout error during the rotation process;

[0019] (2) The pipe fitting is fixed in the inner hole of the rotating shaft by a chuck. When processing pipe fittings of the same diameter, it is only necessary to loosen the chuck and replace the pipe fitting;

[0020] (3) The guide is installed on the frame through fasteners. By replacing the guide with different center hole diameters, the processing of pipes with different outer diameters can be met, thereby effectively reducing the equipment cost and improving the application range of the device processing. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a schematic structural diagram of a device for reducing rotational vibration of a micro-circular tube according to an embodiment of the present utility model;

[0022] Figure 2 This is a schematic diagram of the exploded structure of the device for reducing the rotational vibration of a micro-circular tube according to an embodiment of the utility model;

[0023] Figure 3 This is a schematic diagram of the internal structure of a device for reducing the rotational vibration of a micro-circular tube according to an embodiment of the utility model;

[0024] Figure 4 This is a structural diagram of the frame in the embodiment of the present utility model;

[0025] Figure 5 This is a schematic structural diagram of a guide in an embodiment of the present utility model;

[0026] Figure 6 This is a schematic diagram of the guide structure of the center hole with different diameters in the embodiment of the utility model;

[0027] Figure 7 This is a schematic diagram of the position structure of the center hole and the pipe in the embodiment of the utility model;

[0028] Among them, 1, frame; 101, boss; 2, shaft;

[0029] 3. Frame; 301. Support portion; 302. Connecting portion; 303. Mounting portion; 304. Mounting slot; 305. Through hole; 306. First connecting hole; 4. Clamp;

[0030] 5. Guide; 501. Center hole; 502. Second connecting hole;

[0031] 6. Fasteners; 7. Pipe fittings; 8. Inner hole. DETAILED DESCRIPTION

[0032] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. These drawings are simplified schematic diagrams that only illustrate the basic structure of the present invention in a schematic manner, and therefore only show components related to the present invention.

[0033] like Figure 1-Figure 7As shown, a device for reducing the rotational vibration of a fine circular tube includes a frame 1, on which a rotating shaft 2 is rotatably mounted, an inner hole 8 for mounting a pipe fitting 7 is provided inside the rotating shaft 2, a frame body 3 is sleeved on the outer side of the rotating shaft 2, and one end of the frame body 3 is fixedly connected to the frame 1, and a detachable guide 5 is installed on the other end; a through hole 305 and a first connecting hole 306 are provided on the frame body 3, and a center hole 501 and a second connecting hole 502 are provided on the guide 5; the inner diameter of the second connecting hole 502 is larger than the inner diameter of the first connecting hole 306, the inner diameter of the first connecting hole 306 is the same as the outer diameter of the fastener 6, and one end of the fastener 6 passes through the second connecting hole 502 and is embedded in the first connecting hole 306; one end of the pipe fitting 7 passes through the center hole 501 and the through hole 305 and is fixedly mounted in the inner hole 8, and there is a gap between the outer circumferential surface of the pipe fitting 7 and the inner wall of the center hole 501.

[0034] As mentioned above, the inner diameter of the second connecting hole 502 is larger than the outer diameter of the fastener 6. When the guide 5 is not completely fixed, the rotating shaft 2 drives the pipe 7 to rotate so that the inner wall of the center hole 501 contacts the surface of the pipe 7. The generated contact force will cause the guide 5 to automatically adjust its position up, down, left and right, and finally reach a most suitable position. The contact force at this position is the smallest, and then the fastener 6 is tightened to completely fix the guide 5 on the frame 3. Since the center hole 501 of the guide 5 plays a restraining role, the radial runout error of the pipe 7 during the rotation process will not exceed the size of the gap, thereby effectively reducing its runout error during the rotation processing process.

[0035] Among them, the end of the rotating shaft 2 opposite to the frame 1 is located on the inner side of the frame body 3, and the inner hole 8 and the through hole 305 are coaxial with the rotating shaft 2; the center hole 501 of the guide 5 is completed by a precision machining machine, and its diameter is slightly larger than the outer diameter of the pipe 7, and the gap is guaranteed to be within 10 microns; the fastener 6 preferably uses a screw, the first connecting hole 306 uses a threaded hole, and the second connecting hole 502 uses a smooth hole. One end of the fastener 6 passes through the second connecting hole 502 and is screwed into the first connecting hole 306, finally realizing the fixed installation of the guide 5 on the frame body 3.

[0036] The pipe fitting 7 is fixedly mounted on the rotating shaft 2 by a chuck 4. The chuck 4 is arranged at the end of the rotating shaft 2 and is sleeved on the outside of the pipe fitting 7. The chuck 4 here adopts the existing technology, including a pneumatic chuck 4, a hydraulic chuck 4, a spring chuck 4 or a three-jaw chuck and other components. Its function is to fix the pipe fitting 7 on the rotating shaft 2, and one end of the pipe fitting 7 can extend into the inner hole 8.

[0037] The pipe 7 is fixed in the inner hole 8 of the rotating shaft 2 by the chuck 4. When processing the pipe 7 with the same diameter, it is only necessary to loosen the chuck 4 and replace the pipe 7. The guide 5 is mounted on the frame 3 by the fastener 6. By replacing the guide 5 with a different center hole 501 diameter (such as Figure 6As shown), it can meet the processing needs of pipes 7 with different outer diameters, thereby effectively reducing equipment costs and improving the applicable scope of the processing device.

[0038] In order to ensure the stability of the installation of the guide 5, a plurality of first connecting holes 306 and second connecting holes 502 are provided, and the plurality of first connecting holes 306 are distributed in a circular array around the axis of the rotating shaft 2 on the circumferential side of the through hole 305, and the plurality of second connecting holes 502 are distributed in a circular array around the axis of the center hole 501. Here, the number of the first connecting holes 306 and the second connecting holes 502 is preferably four, so that the guide 5 can automatically adjust its position in the up, down, left and right directions.

[0039] The frame 3 includes a supporting portion 301, and a connecting portion 302 and an installing portion 303 are respectively provided at both ends of the supporting portion 301. The supporting portion 301, the connecting portion 302 and the installing portion 303 adopt an integrated molding structure to facilitate overall disassembly, assembly and replacement, and the connecting portion 302 is fixedly connected to the frame 1, and the guide 5 is arranged on the installing portion 303.

[0040] The connection portion 302 is a flange structure, and the frame 1 is provided with a boss 101 corresponding to the connection portion 302, and the boss 101 is fixedly connected to the connection portion 302. The flange connection structure ensures a high connection strength between the frame 3 and the frame 1, is easy and flexible to install, and is convenient for disassembly and maintenance.

[0041] Furthermore, the mounting portion 303 is provided with a mounting groove 304 for placing the guide 5, and the through hole 305 and the first connecting hole 306 are both located in the mounting groove 304; and after the guide 5 is placed inside the mounting groove 304, its outer side surface is flush with the outer side surface of the mounting portion 303 of the frame 3, which greatly improves the overall space utilization of the device and also improves the aesthetics of the structure.

[0042] In addition, in order to facilitate the removal of the guide 5 in the installation groove 304, a notch is opened on the side of the installation groove 304, and the side end of the guide 5 extends through the notch to the outside of the installation groove 304. When dismantling, the guide 5 can be directly taken out of the installation groove 304 from here.

[0043] Working principle:

[0044] First, the frame 3 is installed on the frame 1 of the rotating shaft 2, and then one end of the metal pipe 7 is installed in the inner hole 8 of the rotating shaft 2 through the through hole 305 and tightened by the chuck 4; then the guide 5 is sleeved on the outside of the pipe 7 so that the pipe 7 passes through the center hole 501, and the guide 5 is lightly fixed to the frame 3 with the fastener 6; in order to reduce the installation error, the guide 5 is not completely fixed on the frame 3 at this time, and then the rotating shaft 2 is started to drive the pipe 7 to rotate; during the rotation, the inner wall of the center hole 501 contacts the surface of the pipe 7, and the aperture of the second connecting hole 502 is larger than the outer diameter of the fastener 6, so the contact force generated will cause the guide 5 to automatically adjust its position up, down, left and right, and finally reach a most suitable position where the contact force is the smallest; finally, the fastener 6 completely fixes the guide 5 on the frame 3, and since the center hole 501 of the guide 5 plays a restraining role, the radial runout error of the pipe 7 during rotation will not exceed the size of the gap, thereby effectively reducing its runout error during the rotating processing process.

[0045] In summary, the utility model proposes a device for reducing the rotational runout of fine circular tubes, which uses a low-cost, highly flexible mechanical structure to reduce the radial runout error during the rotation of the pipe 7 driven by the ordinary precision rotating shaft 2; and for subsequent processing of pipes 7 with the same diameter, it is only necessary to loosen the chuck 4 and replace the pipe 7; by replacing the guide 5 with a different center hole 501 aperture, it can meet the processing needs of pipes 7 with different outer diameters, thereby effectively reducing the equipment cost and greatly improving the application range of the processing of the device.

[0046] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, features defined as "first", "second", etc. may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0047] In the description of this utility model, it should be noted that, unless otherwise expressly specified or limited, the terms "installed," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections, electrical connections; direct connections, indirect connections through an intermediate medium, and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on specific circumstances.

[0048] The above description is based on the ideal embodiment of the present invention. Based on the above description, relevant personnel can make various changes and modifications without departing from the technical scope of the present invention. The technical scope of the present invention is not limited to the content of the specification, but must be determined according to the scope of the claims.

Claims

1. A device for reducing the rotational vibration of a micro-circular tube, characterized by: It comprises a frame (1) and a fastener (6), wherein a rotating shaft (2) is rotatably mounted on the frame (1), an inner hole (8) for mounting a pipe (7) is provided inside the rotating shaft (2), a frame body (3) is sleeved on the outer side of the rotating shaft (2), and one end of the frame body (3) is fixedly connected to the frame (1), and a detachable guide (5) is mounted on the other end; The frame (3) is provided with a through hole (305) and a first connecting hole (306), and the guide (5) is provided with a central hole (501) and a second connecting hole (502); the inner diameter of the second connecting hole (502) is larger than the inner diameter of the first connecting hole (306), the inner diameter of the first connecting hole (306) is the same as the outer diameter of the fastener (6), and one end of the fastener (6) passes through the second connecting hole (502) and is embedded in the first connecting hole (306); One end of the pipe (7) passes through the central hole (501) and the through hole (305) and is fixedly installed in the inner hole (8), and a gap exists between the outer circumferential surface of the pipe (7) and the inner wall of the central hole (501).

2. The device for reducing the rotational vibration of a micro-tube according to claim 1, characterized in that: One end of the rotating shaft (2) opposite to the frame (1) is located inside the frame body (3), and the inner hole (8) and the through hole (305) are both coaxial with the rotating shaft (2).

3. The device for reducing the rotational vibration of a micro-tube according to claim 1, characterized in that: A plurality of the first connecting holes (306) and the second connecting holes (502) are provided. The former are distributed in a circular array around the axis of the rotating shaft (2) on the circumferential side of the through hole (305), and the latter are distributed in a circular array around the axis of the central hole (501).

4. The device for reducing rotational vibration of a micro-tube according to claim 1, characterized in that: The frame (3) comprises a supporting portion (301), and a connecting portion (302) and a mounting portion (303) are respectively provided at both ends of the supporting portion (301), and the connecting portion (302) is fixedly connected to the frame (1), and the guide (5) is provided on the mounting portion (303).

5. The device for reducing rotational vibration of a micro-tube according to claim 4, characterized in that: The connecting portion (302) adopts a flange structure, and a boss (101) corresponding to the connecting portion (302) is provided on the frame (1), and the boss (101) and the connecting portion (302) are fixedly connected.

6. The device for reducing rotational vibration of a micro-tube according to claim 4, characterized in that: The mounting portion (303) is provided with a mounting groove (304) for placing the guide (5), and the through hole (305) and the first connecting hole (306) are both located in the mounting groove (304).

7. The device for reducing rotational vibration of a micro-tube according to claim 6, characterized in that: A notch is provided on the side of the installation groove (304), and the side end of the guide (5) passes through the notch and extends to the outside of the installation groove (304).

8. The device for reducing rotational vibration of a micro-tube according to any one of claims 1 to 7, characterized in that: A chuck (4) for fixing the pipe (7) is installed at the end of the rotating shaft (2), and the chuck (4) is sleeved on the outside of the pipe (7).

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