Pipe expanding tool

Abstract

The utility model discloses a pipe expanding tool, which relates to the field of pipe expanding, and is characterized in that a driving fixing clamp is mounted on the inner surface of a mounting plate, an expanding pipe is mounted in the driving fixing clamp, the driving fixing clamp is fixedly mounted on the inner surface of the mounting plate, and the expanding pipe is nested in the driving fixing clamp; a fixed limiting frame is mounted on the upper surface of the mounting plate, and an elastic sliding mechanism for conducting auxiliary supporting on the expanded pipe is mounted in the fixed limiting frame. According to the pipe expanding tool, during expanding operation of a pipe, when an expanding abutting block continuously expands the diameter forwards along the interior of the expanded pipe and gradually moves to approach a movable clamping jaw, the expanded pipe can be enlarged to eject the movable clamping jaw outwards, and the movable clamping jaw slides outwards along the interior of a sliding limiting frame; and in the sliding process, the compression spring is compressed, so that the diameter-expanded pipe is always kept fixed, and the stability of the diameter-expanded pipe is improved through the design.

Description

Technical Field

[0001] This utility model relates to the field of pipe diameter expansion technology, specifically a tooling. Background Technology

[0002] As the name suggests, variable diameter ultra-fine metal tubing is metal tubing with different outer diameters at the front and back. If the traditional drawing process is used to prepare it, it is difficult to produce variable diameter metal tubing. Therefore, it is necessary to develop a variable diameter process based on the original tubing to produce the required variable diameter metal tubing.

[0003] While there are some publicly available documents on the expansion of metal tubing, they all use end stamping or screw feeding methods. Medical-grade metal tubing typically has a small outer diameter, thin wall thickness, and poor axial support. If stamping is used for expansion, it will directly lead to bending deformation or even breakage of the tubing.

[0004] To overcome the aforementioned deficiencies, existing technology (Chinese Patent Publication No. CN217990701U, application date 2022-05-18) discloses a pipe diameter expansion device, including a driving unit, an expansion liner, an expansion mandrel, an expansion core rod, and a first fixing seat. The driving unit includes a first driving mechanism and a clamping mechanism connected together. The clamping mechanism is used to clamp the head end of the pipe to be expanded, and the first driving mechanism is used to drive the clamping mechanism to move closer to and away from the first fixing seat. The outer diameter of the expansion core rod is smaller than the original inner diameter of the pipe to be expanded, while the outer diameters of the expansion liner and the expansion mandrel are larger than the original inner diameter of the pipe to be expanded. The head end of the expansion core rod is detachably connected to the expansion mandrel, and the tail end of the expansion core rod is detachably connected to the first fixing seat. This invention can solve the problem of unstable diameter expansion due to the small outer diameter, thin wall thickness, and easy bending of ultra-fine metal pipes.

[0005] While the existing design can solve the above problems, the support design for pipes is too simple, and the rigid fixing method is not convenient for pipe diameter expansion operations. It may cause the contact block to get stuck and unable to move. Moreover, the movement method of the contact block is too complicated and not convenient for assembly and disassembly. Utility Model Content

[0006] The purpose of this utility model is to provide a pipe expansion tooling to solve the problems mentioned in the background art, such as the overly simple support design for pipes, the rigid fixing method which is not convenient for pipe expansion operations, the possibility of the contact block being stuck and unable to move, and the overly complicated movement method of the contact block which is inconvenient for assembly and disassembly.

[0007] To achieve the above objectives, this utility model provides the following technical solution: a pipe expansion tooling, comprising a drive fixing clamp mounted on the inner surface of the mounting plate, and an expansion pipe mounted inside the drive fixing clamp, the drive fixing clamp being fixedly mounted on the inner surface of the mounting plate, and the expansion pipe being nested inside the drive fixing clamp, a fixed limiting frame mounted on the upper surface of the mounting plate, and an elastic sliding mechanism for auxiliary support of the expansion pipe being mounted inside the fixed limiting frame, the elastic sliding mechanism including a movable gripper, the front end of the movable gripper being semi-circular, the movable gripper being slidably mounted on the inner surface of the fixed limiting frame, and a sliding limiting frame mounted on the outer surface of the movable gripper, the sliding limiting frame being fixedly mounted on the outer surface of the fixed limiting frame, and a compression spring mounted on the outer surface of the movable gripper;

[0008] A drive motor is mounted on the top of the mounting plate, and a sliding engagement mechanism for transmitting power to the enlarged hole abutment block is mounted in the driving direction of the drive motor.

[0009] Furthermore, the meshing sliding mechanism includes a rotating gear, which is fixedly installed in the driving direction of the drive motor. The drive motor is fixedly installed on the upper surface of the mounting plate, and a fixed gear rod is installed above the rotating gear. A fixed moving groove is installed on the right side of the fixed gear rod, and the fixed gear rod and the fixed moving groove are designed as an integral unit.

[0010] Furthermore, a fitting support rod is installed inside the fixed moving groove, and the fitting support rod is fixedly installed on the upper surface of the mounting plate. A hole-expanding contact block is installed on the left side of the fixed gear rod, and auxiliary moving plates are installed on the left and right sides of the hole-expanding contact block. An installation auxiliary frame is installed on the outer surface of the auxiliary moving plate, and a sliding inner groove is opened on the outer surface of the installation auxiliary frame. The auxiliary moving plate slides along the inside of the sliding inner groove.

[0011] Furthermore, the compression spring is nested on the outer surface of the movable gripper, and the end of the compression spring is in contact with the inner surface of the fixed limiting frame. Moreover, the driving and fixing clamps are electrically driven to fix the ends of the expanded diameter pipes in two sets.

[0012] Furthermore, the inner sides of the fixed limiting frame contact the outer surface of the movable gripper to form a sliding structure, and the inner surface of the sliding limiting frame contacts the outer surface of the movable gripper to form a sliding structure. Moreover, the fixed limiting frame is fixedly installed on the upper surface of the mounting plate.

[0013] Furthermore, the compression spring is nested on the outer surface of the movable gripper, and the inner surface of the fixed limiting frame contacts the end of the compression spring to form an elastic structure. Moreover, the outer surface of the expanded diameter pipe is nested inside the front end of the movable gripper, and two sets of sliding limiting frames, compression springs, and movable grippers are symmetrically installed about the center point of the fixed limiting frame.

[0014] Furthermore, the enlarged hole contact block and the auxiliary moving plate are designed as a single unit, and the inner surface of the sliding inner groove contacts the outer surface of the auxiliary moving plate to form a sliding structure.

[0015] Compared with the prior art, the beneficial effects of this utility model are as follows: When the pipe diameter expansion tool is used to expand the diameter of the pipe, as the expansion contact block moves forward along the inside of the pipe to increase the diameter, and gradually moves closer to the moving jaw, the pipe will increase in size and push the moving jaw outward. The moving jaw slides outward along the inside of the sliding limit frame, and the compression spring is compressed during the sliding process to keep the pipe fixed. This design improves the stability of the expanded pipe.

[0016] Furthermore, when it is necessary to perform internal expansion of the pipe, the drive motor is started to drive the rotating gear to rotate. The rotating gear drives the fixed gear rod that is in contact with each other, causing the fixed moving groove that is fixed to it to slide forward under the constraint of the fitting support rod. At the same time, the expansion contact block enters the interior of the expanded pipe and gradually expands the interior.

[0017] Furthermore, the auxiliary moving plates installed on the left and right sides of the enlarged hole contact block are also limited and slid during the movement of the fixed gear rod due to the constraint of the installation auxiliary frame, thus ensuring the stable operation of the enlarged hole contact block. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the three-dimensional structure of the drive fixing clamp of this utility model;

[0019] Figure 2 This is a three-dimensional structural diagram of the fixed limiting frame of this utility model;

[0020] Figure 3 This is a schematic diagram of the three-dimensional structure of the movable gripper of this utility model;

[0021] Figure 4 This is a three-dimensional structural diagram of the installation auxiliary frame of this utility model;

[0022] Figure 5 This is a three-dimensional structural diagram of the compression spring of this utility model;

[0023] Figure 6 This is a three-dimensional structural diagram of the drive motor of this utility model.

[0024] In the diagram: 1. Mounting plate; 2. Drive clamp; 3. Rotating gear; 4. Expanded diameter pipe; 5. Fixed limit frame; 6. Sliding limit frame; 7. Compression spring; 8. Sliding inner groove; 9. Moving gripper; 10. Expanding hole contact block; 11. Auxiliary moving plate; 12. Mounting auxiliary frame; 13. Fixed gear rod; 14. Drive motor; 15. Fixed moving groove; 16. Fitting support rod. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0026] Example 1: Please refer to Figure 1-6 The present invention provides the following technical solution: a pipe diameter expansion tool, comprising an mounting plate 1, a drive fixing clamp 2 and an interlocking support rod 16.

[0027] A drive fixing clamp 2 is installed on the inner surface of the mounting plate 1, and an expanded diameter pipe 4 is installed inside the drive fixing clamp 2. The drive fixing clamp 2 is fixedly installed on the inner surface of the mounting plate 1, and the expanded diameter pipe 4 is nested inside the drive fixing clamp 2. A fixed limiting frame 5 is installed on the upper surface of the mounting plate 1, and an elastic sliding mechanism for auxiliary support of the expanded diameter pipe 4 is installed inside the fixed limiting frame 5. The elastic sliding mechanism includes a movable claw 9, and the front end of the movable claw 9 is semi-circular. The movable claw 9 is slidably installed on the inner surface of the fixed limiting frame 5, and a sliding limiting frame 6 is installed on the outer surface of the movable claw 9. The sliding limiting frame 6 is fixedly installed on the outer surface of the fixed limiting frame 5, and a compression spring 7 is installed on the outer surface of the movable claw 9.

[0028] A drive motor 14 is mounted on the top of the mounting plate 1, and a sliding engagement mechanism for transmitting power to the enlarged hole contact block 10 is mounted in the driving direction of the drive motor 14.

[0029] like Figure 1 , Figure 3 , Figure 5The technical solution shown herein, in order to solve the problem of unstable fixing effect of the pipe during the expansion process, discloses that: a compression spring 7 is nested on the outer surface of the movable gripper 9, and the end of the compression spring 7 is in contact with the inner surface of the fixed limiting frame 5; the driving fixing clamp 2 is electrically driven to fix the end of the expanded pipe 4 in two sets; the inner sides of the fixed limiting frame 5 are in contact with the outer surface of the movable gripper 9 to form a sliding structure; the inner surface of the sliding limiting frame 6 is in contact with the outer surface of the movable gripper 9 to form a sliding structure; the fixed limiting frame 5 is fixedly installed on the upper surface of the mounting plate 1; the compression spring 7 is nested on the outer surface of the movable gripper 9, and the inner surface of the fixed limiting frame 5 is in contact with the end of the compression spring 7 to form an elastic structure; the outer surface of the expanded pipe 4 is nested inside the front end of the movable gripper 9; and two sets of sliding limiting frame 6, compression spring 7, and movable gripper 9 are symmetrically installed about the center point of the fixed limiting frame 5.

[0030] When more stable support is needed for the expanded diameter pipe 4, during the initial installation of the expanded diameter pipe 4, the expanded diameter pipe 4 is placed inside the drive fixing clamp 2 and then directly clamped internally to fix the end of the expanded diameter pipe 4. During the internal expansion operation of the expanded diameter pipe 4, as the diameter increases due to the contact, the outside of the expanded diameter pipe 4 is also compressed and enlarged. The expanded diameter pipe 4 pushes the movable clamp 9, which is nested and fixed on the outer surface, outward. The movement of the movable clamp 9 is along the sliding limit frame 6, which is fixedly installed on both sides of the fixed limit frame 5. During the sliding of the movable clamp 9, the compression spring 7, which is nested and installed on the outer surface of the movable clamp 9, is driven to contact the inner surface of the fixed limit frame 5 with the movement. The compression spring 7 is squeezed inward with the contact until the expanded diameter pipe 4 completes the appropriate expansion size.

[0031] like Figure 2 , Figure 4 , Figure 6The technical solution shown addresses the problem that the motion design of the contact head is too complex, making assembly inconvenient and hindering operation. It discloses the following: the meshing sliding mechanism includes a rotating gear 3, which is fixedly mounted in the driving direction of the drive motor 14. The drive motor 14 is fixedly mounted on the upper surface of the mounting plate 1. A fixed gear rod 13 is mounted above the rotating gear 3. A fixed moving groove 15 is mounted on the right side of the fixed gear rod 13. The fixed gear rod 13 and the fixed moving groove 15 are integrated. A fitting support rod is installed inside the fixed moving groove 15. 16, and the fitting support rod 16 is fixedly installed on the upper surface of the mounting plate 1. The left side of the fixed gear rod 13 is equipped with an enlarged hole abutment block 10, and the left and right sides of the enlarged hole abutment block 10 are equipped with auxiliary moving plates 11. The outer surface of the auxiliary moving plate 11 is equipped with an installation auxiliary frame 12, and the outer surface of the installation auxiliary frame 12 is provided with a sliding inner groove 8. The auxiliary moving plate 11 slides along the inside of the sliding inner groove 8. The enlarged hole abutment block 10 and the auxiliary moving plate 11 are designed as an integral piece, and the inner surface of the sliding inner groove 8 contacts the outer surface of the auxiliary moving plate 11 to form a sliding structure.

[0032] When the expansion operation of the expanded pipe 4 is required, the drive motor 14 is started first. The start of the drive motor 14 drives the rotating gear 3 fixedly installed at the output end to rotate in a circle. As the rotating gear 3 rotates, the fixed gear rod 13, which is in contact with the rotating gear 3, is driven to produce a meshing motion. The fixed gear rod 13 is driven to move forward under the drive of the meshing motion. As the fixed gear rod 13 moves forward, the fixed moving groove 15 fixedly installed on the side of the fixed gear rod 13 also moves synchronously. Since the fitting support rod 16 is nested in the fitting support rod 16 The inner surface of the fixed gear rod 13 moves horizontally along the outer surface of the fitting support rod 16. Since the enlarged hole contact block 10 and the fixed gear rod 13 are designed as a single unit, the enlarged hole contact block 10 moves forward synchronously with the forward movement of the fixed gear rod 13. During the movement of the enlarged hole contact block 10, the auxiliary moving plates 11 fixedly installed on the left and right sides of the enlarged hole contact block 10 move synchronously. The auxiliary moving plates 11 slide along the sliding inner groove 8 opened on the outer surface of the mounting auxiliary frame 12, ensuring the movement stability of the enlarged hole contact block 10.

[0033] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0034] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A pipe expanding tool, comprising a mounting plate (1), a driving fixed clamp (2) and an embedded support rod (16); characterized in that The inner surface of the mounting plate (1) is provided with the driving fixed clamp (2), and the inside of the driving fixed clamp (2) is provided with the expanding pipe (4); the driving fixed clamp (2) is fixedly installed on the inner surface of the mounting plate (1), and the expanding pipe (4) is nestedly installed in the inside of the driving fixed clamp (2); the upper surface of the mounting plate (1) is provided with the fixed limiting frame (5), and the inside of the fixed limiting frame (5) is provided with the elastic sliding mechanism for assisting the support of the expanding pipe (4); the elastic sliding mechanism comprises the moving clamp jaw (9), the front end of the moving clamp jaw (9) is designed in a semicircle, the moving clamp jaw (9) is slidingly installed on the inner surface of the fixed limiting frame (5), and the outer surface of the moving clamp jaw (9) is provided with the sliding limiting frame (6); the sliding limiting frame (6) is fixedly installed on the outer surface of the fixed limiting frame (5), and the outer surface of the moving clamp jaw (9) is provided with the compression spring (7). The upper side of the mounting plate (1) is provided with the driving motor (14), and the driving direction of the driving motor (14) is provided with the meshing sliding mechanism for driving the hole expanding resisting block (10).

2. The pipe expanding tool of claim 1, wherein: The meshing sliding mechanism comprises the rotating gear (3), and the rotating gear (3) is fixedly installed on the driving direction of the driving motor (14); the driving motor (14) is fixedly installed on the upper surface of the mounting plate (1), and the upper side of the rotating gear (3) is provided with the fixed gear rod (13); the right side of the fixed gear rod (13) is provided with the fixed moving groove (15), and the fixed gear rod (13) and the fixed moving groove (15) are designed in an integral manner.

3. A pipe expanding tool according to claim 2, wherein: The inside of the fixed moving groove (15) is provided with the embedded support rod (16), and the embedded support rod (16) is fixedly installed on the upper surface of the mounting plate (1); the left side of the fixed gear rod (13) is provided with the hole expanding resisting block (10), and the left and right sides of the hole expanding resisting block (10) are provided with the auxiliary moving plate (11); the outer surface of the auxiliary moving plate (11) is provided with the installation auxiliary frame (12), and the outer surface of the installation auxiliary frame (12) is provided with the sliding inner groove (8); and the auxiliary moving plate (11) slides along the inside of the sliding inner groove (8).

4. The pipe expanding tool of claim 1, wherein: The compression spring (7) is nestedly installed on the outer surface of the moving clamp jaw (9), the end of the compression spring (7) is in contact with the inner surface of the fixed limiting frame (5), and the driving fixed clamp (2) is electrically driven to fix the ends of the expanding pipe (4).

5. The pipe expanding tool of claim 1, wherein: The inner surfaces of the left and right sides of the fixed limiting frame (5) are in contact with the outer surface of the moving clamp jaw (9) to form a sliding structure, the inner surface of the sliding limiting frame (6) is in contact with the outer surface of the moving clamp jaw (9) to form a sliding structure, and the fixed limiting frame (5) is fixedly installed on the upper surface of the mounting plate (1).

6. The pipe expanding tool of claim 1, wherein: The compression spring (7) is nested on the outer surface of the moving clamp jaw (9), the inner surface of the fixed limiting frame (5) is in contact with the end of the compression spring (7) to form an elastic structure, the outer surface of the expanded pipe (4) is nested on the inner surface of the front end of the moving clamp jaw (9), and the sliding limiting frame (6) is symmetrically installed with two groups about the center point of the fixed limiting frame (5) with the compression spring (7) and the moving clamp jaw (9).

7. The pipe expanding tool of claim 3, wherein: The reaming resistance block (10) and the auxiliary moving plate (11) are designed in an integrated mode, and the inner surface of the sliding inner groove (8) is in contact with the outer surface of the auxiliary moving plate (11) to form a sliding structure.

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