Rapid tool retracting mechanism of boring machine in pipe orifice

Abstract

The utility model discloses a quick tool retracting mechanism of a boring machine in a pipeline orifice, which comprises a tool bar, a tool apron, a tool rest and a tool disc, the tool bar is fixed on the tool apron, the tool apron is fixed on the tool rest, a spring mechanism is arranged in the tool rest, the tool rest is fixed on the tool disc, the tool disc is fixed on a main shaft of a lathe, and the main shaft of the lathe is fixed on the main shaft of the lathe. The quick tool retracting mechanism comprises a tool holder, a wheel shaft is arranged at the upper end of one side of the tool holder, a connecting rod is arranged on one side of the wheel shaft, the central axis of the connecting rod and the central axis of the wheel shaft do not coincide, an outer wheel is arranged at one end of the connecting rod, and a pipeline is clamped between the outer wheel and a tool bar. And damage to the inner wall and the outer wall of the pipeline can be avoided, the use convenience is greatly improved, and the service life of equipment is prolonged.

Description

Technical Field

[0001] This utility model relates to the field of boring technology, specifically a rapid tool retraction mechanism for a boring machine for pipe openings. Background Technology

[0002] In the construction of long-distance oil and gas pipelines, to facilitate the alignment and welding of pipeline ends, bevels of a specific shape need to be machined on the pipeline ends according to the dimensions required by the welding process. In actual welding scenarios, situations may arise where the outer diameters of the pipelines are the same, but the inner diameters are different. In such cases, directly beveling the ends cannot meet the construction process requirements; the inner diameter of the pipelines needs to be bored to ensure that the inner diameters of the two pipeline ends being aligned for welding are consistent. With both the inner and outer diameters of the two pipeline ends being the same, further beveling ensures consistency on both sides, thereby improving the welding quality.

[0003] To ensure that the inner diameter of the machined pipe meets the requirements of the beveling process, most existing pipe boring mechanisms employ a floating tool holder with a follower wheel, such as... Figure 1 As shown, the pipe 7 is relatively fixed in position relative to the boring tools such as the tool holder 4, tool base 3, and tool shank 2 mounted on the cutter head 5. A spring mechanism is set on the tool holder 4 so that the tool holder 4 has an appropriate floating amount in the radial direction of the cutter head 5. The outer follower wheel 1 is installed on the tool base 3 near the lower position of the tool shank 2. When the internal boring machine is working, the rim of the follower wheel 1 is always in close contact with the inner wall of the pipe opening under the action of the spring force. After adjusting the relative position between the tool shank 2 and the follower wheel 1 according to the size of the internal boring hole, the tool shank 2 is clamped and fixed on the tool base 3. When the cutter head 5 rotates and feeds for boring, the follower wheel 1 always follows the undulation of the inner wall of the pipe opening near the cutting position, driving the tool shank 2 to float together in the radial direction of the cutter head 5. This achieves the purpose of contour cutting with the inner wall of the pipe opening as the reference. The dimensional accuracy of the internal boring hole produced in this way can meet the requirements of the subsequent beveling process.

[0004] After the boring operation is completed, the tool needs to be retracted (that is, the tool holder is withdrawn along the pipe axis to the position away from the pipe). At this time, the follower wheel 1 and the boring tool are in close contact with the pipe wall of the pipe 7. If the tool is retracted directly, the boring tool can easily scratch the inner wall of the pipe 7, which does not meet the requirements of the subsequent beveling process. The follower wheel 1 may also scratch the outer wall of the pipe. Most existing pipe boring mechanisms adopt the method of rotating and retracting the tool at the same time to avoid the above problems. However, the method of rotating and retracting the tool at the same time is slow and takes a long time. At the same time, the equipment running time is extended, which accelerates the aging of the equipment. Summary of the Invention

[0005] The technical problem to be solved by this utility model is to overcome the existing defects and provide a fast retraction mechanism for a pipe end boring machine, which can improve the retraction efficiency and avoid damage to the inner and outer walls of the pipe, thus effectively solving the problems in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a rapid retraction mechanism for a pipe end boring machine, comprising a tool shank, a tool holder, a tool post, and a tool disc. The tool shank is fixed on the tool holder, the tool holder is fixed on the tool post, a spring mechanism is provided inside the tool post, the tool post is fixed on the tool disc, the tool disc is fixed on the spindle of a lathe, a wheel axle is provided on the upper end of one side of the tool holder, a connecting rod is provided on one side of the wheel axle, the connecting rod does not coincide with the central axis of the wheel axle, an outer wheel is provided at one end of the connecting rod, and the pipe is clamped between the outer wheel and the tool shank.

[0007] As a preferred embodiment of this utility model, the connecting rod is provided with a through hole, and a handle is inserted into the through hole.

[0008] As a preferred embodiment of this utility model, the upper surface of the tool holder is threaded with a set bolt, which is used to fix the wheel axle.

[0009] Compared with the prior art, the beneficial effects of this utility model are: the quick retraction mechanism of this pipe end boring machine is reasonably designed and ingeniously conceived. The outer wheel is set above the pipe to avoid the outer wheel crushing foreign objects such as iron filings. Through the eccentric design of the outer wheel and the wheel axle, a gap is left between the outer wheel and the pipe during the retraction, which facilitates quick retraction and will not damage the inner or outer wall of the pipe. Attached Figure Description

[0010] Figure 1 This is a schematic diagram of the existing boring mechanism;

[0011] Figure 2 This is a schematic diagram of the structure of this utility model;

[0012] Figure 3 This is a diagram illustrating the adjustment of the outer wheel;

[0013] Figure 4 This is a schematic diagram of the eccentric structure of the outer wheel.

[0014] In the diagram: 1 Follower wheel, 2 Tool holder, 3 Tool holder, 4 Tool post, 5 Tool disc, 6 Spindle, 7 Pipe, 8 Wheel shaft, 9 Connecting rod, 10 Through hole, 11 Outer wheel, 12 Handle, 13 Set bolt. Detailed Implementation

[0015] 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 (for ease of description and understanding, hereinafter referred to as...). Figure 2 (The above is described above). Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0016] Please see Figure 1-4 This utility model provides a technical solution: a rapid retraction mechanism for a pipe end boring machine, including a tool bar 2, a tool holder 3, a tool post 4, and a tool disc 5. The tool bar 2 is fixed on the tool holder 3, the tool holder 3 is fixed on the tool post 4, a spring mechanism is provided inside the tool post 4, the tool post 4 is fixed on the tool disc 5, and the tool disc 5 is fixed on the lathe spindle 6. A wheel axle 8 is provided on the upper end of one side of the tool holder 3, and a connecting rod 9 is provided on one side of the wheel axle 8. The connecting rod 9 and the center axis of the wheel axle 8 do not coincide. An outer wheel 11 is provided at one end of the connecting rod 9. The outer wheel 11 clamps the pipe 7 between itself and the tool bar 2. The outer wheel 11 is located above the pipe 7 to avoid the outer wheel crushing foreign objects such as iron filings, and at the same time facilitates the worker's observation and operation.

[0017] To facilitate control of the rotation of the outer wheel 12, a through hole 10 is provided on the connecting rod 9, and a handle 12 is inserted into the through hole 10.

[0018] To facilitate fixing the position of the outer wheel 12, the upper surface of the tool holder 3 is threaded with a set bolt 13, which is used to fix the wheel axle 8.

[0019] When the internal boring machine is boring, the rim of the outer wheel 11 is always in close contact with the outer wall of the pipe 7 under the action of the spring force. After adjusting the relative position between the tool bar 2 and the outer wheel 11 according to the size of the internal boring hole, the tool bar 2 is clamped and fixed on the tool holder 3. When the tool disc 5 rotates and feeds for boring, the outer wheel 11 always follows the undulation of the inner wall of the pipe near the cutting position, driving the tool bar 2 to float radially along the tool disc 5 until the boring reaches the set depth. Then the tool disc 5 stops rotating and is ready to retract the tool.

[0020] Before retracting the tool, the set bolt 13 needs to be loosened first, then the handle 12 is inserted into the through hole 10, rotated 180°, and then the set bolt 13 is tightened. The eccentricity direction is rotated from downward eccentricity to upward eccentricity. At this time, a deflection gap is generated between the outer wheel 11 and the pipe 7, and the internal boring machine can directly retract the tool along the axial direction of the pipe 7 without damaging the pipe.

[0021] This invention allows the outer wheel 11 to be adjusted to a safe distance from the inner and outer pipe walls after boring, by adjusting the eccentric position of the outer wheel 11. This enables the equipment to quickly retract the tool without damaging the inner and outer pipe walls, improving tool retraction efficiency and extending the service life of the equipment.

[0022] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A rapid retraction mechanism for a pipe end boring machine, comprising a tool shank (2), a tool holder (3), a tool post (4), and a tool disc (5), wherein the tool shank (2) is fixed on the tool holder (3), the tool holder (3) is fixed on the tool post (4), a spring mechanism is provided inside the tool post (4), the tool post (4) is fixed on the tool disc (5), and the tool disc (5) is fixed on the spindle (6) of a lathe, characterized in that: A wheel axle (8) is provided on the upper side of one side of the tool holder (3), and a connecting rod (9) is provided on one side of the wheel axle (8). The connecting rod (9) does not coincide with the central axis of the wheel axle (8). An outer wheel (11) is provided at one end of the connecting rod (9), and a pipe (7) is held between the outer wheel (11) and the tool holder (2).

2. The rapid retraction mechanism of a pipe end boring machine according to claim 1, characterized in that: The connecting rod (9) is provided with a through hole (10), and a handle (12) is inserted into the through hole (10).

3. The rapid retraction mechanism of a pipe end boring machine according to claim 1, characterized in that: The upper surface of the tool holder (3) is threaded with a set bolt (13), which is used to fix the wheel axle (8).

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