A spiral tap for machining a tapered thread on a pipe

Abstract

This utility model relates to the field of spiral tap technology, specifically to a spiral tap for pipe tapered thread machining. It features a bearing sleeve with side frames fixedly connected to both sides, and bearing blocks slidably connected to the inner sides of the two side frames. Each of the two bearing blocks has a clamping frame fixedly connected to one side, and arc-shaped clamping plates elastically connected to the inner sides of both clamping frames. One side of each bearing block is elastically connected to the inner wall of the side frame. Connecting sleeves are fitted onto both ends of the mounting rod, and annular inserts are fixedly connected to both ends of the bearing sleeve. Annular grooves for use with the annular inserts are provided on one side of each connecting sleeve. By setting up the elastic clamping structure of the clamping frames and arc-shaped clamping plates, the pipe is clamped and positioned in real time during machining, effectively preventing the tap from shifting or vibrating during rotational cutting, thereby significantly improving the perpendicularity, consistency, and surface quality of the thread machining.

Description

Technical Field

[0001] This utility model relates to the field of spiral tap technology, and in particular to a spiral tap for machining tapered threads on pipes. Background Technology

[0002] Spiral taps for pipe thread machining are key tools widely used in machining internal threads of pipe metal components. These tools create a thread structure with a specific taper and sealing performance inside the workpiece through rotary cutting, making them one of the core process equipment for ensuring the connection strength and sealing of pipeline systems. With the increasing demands for precision and interchangeability of pipe fittings in industrial manufacturing, higher standards are being placed on the machining stability, positioning accuracy, and ease of operation of spiral taps.

[0003] The utility model patent CN215880222U discloses a spiral tap for processing tapered threads on pipes. The device includes a drilling equipment, a drill bit sleeve, a spiral tap, a lifting rod, and a sleeve structure with steel balls and a scale. The sleeve slides along the lifting rod and is lubricated by the steel balls to achieve the guiding function. The drilling depth can be observed with the help of the scale, which solves the problem of not being able to detect the depth of the hole to a certain extent.

[0004] However, in practical applications, this device still suffers from the problem of lacking an effective stabilizing structure during the machining process, causing the tap to easily shift and affecting the accuracy and consistency of thread machining. Furthermore, the need for manual assistance in tap positioning and support not only increases operational difficulty and labor intensity but also makes it susceptible to human error, leading to decreased machining accuracy and affecting the final thread sealing performance and assembly quality. More seriously, these problems not only significantly reduce machining efficiency and finished product yield but may also cause leakage risks in pipeline systems due to thread mismatch or poor sealing, even posing safety hazards and severely impacting the overall product quality and engineering reliability. Therefore, to address the numerous shortcomings of existing technologies, there is an urgent need to propose an innovative spiral tap for machining tapered pipe threads. Utility Model Content

[0005] The purpose of this invention is to provide a spiral tap for machining tapered threads on pipes, which solves the problem that the existing spiral taps lack an effective stabilizing structure, causing the tap to easily deviate and thus affecting the accuracy and consistency of thread machining.

[0006] To achieve the above objectives, this utility model provides a spiral tap for machining tapered threads on pipes, including a mounting rod, and a spiral tap fixedly connected to one end of the mounting rod, with a bearing sleeve sleeved on one side of the mounting rod;

[0007] Both sides of the bearing sleeve are fixedly connected to side frames, and the inner sides of the two side frames are slidably connected to bearing blocks. One side of each of the two bearing blocks is fixedly connected to a clamping frame. Both sides of the inner sides of the two clamping frames are elastically connected to arc-shaped clamping plates. One side of each of the two bearing blocks is elastically connected to the inner wall of the side frame. Both ends of the mounting rod are fitted with connecting sleeves, and both ends of the bearing sleeve are fixedly connected to annular insert plates. One side of each of the two connecting sleeves is provided with annular grooves for use with the annular insert plates. Both connecting sleeves are detachably connected to the mounting rod.

[0008] Each of the two connecting sleeves has an arc-shaped plate fixedly connected to one side, and each of the two arc-shaped plates has a threaded rod at the top, and threaded grooves are opened on one side of the arc-shaped plate and the mounting rod.

[0009] Each of the two load-bearing blocks has a slider fixedly connected to both sides, and the slider is slidably connected to the inner wall of the side frame through a groove.

[0010] Each of the two load-bearing blocks has a compression spring fixedly connected to one side, and one end of each compression spring is fixedly connected to the inner wall of the two side frames.

[0011] The four sliders are all clearance fits with the four grooves.

[0012] One side of each of the four arc-shaped clamping plates is rotatably connected to the inner wall of the two clamping frames via a torsion spring pivot.

[0013] This utility model discloses a spiral tap for machining conical pipe threads. Through an elastic clamping structure consisting of a clamping frame and an arc-shaped clamping plate, the pipe is clamped and positioned in real time during machining, effectively preventing the tap from shifting or vibrating during rotational cutting, thus significantly improving the perpendicularity, consistency, and surface quality of the thread machining. Secondly, it solves the technical problem of requiring manual support and positioning in traditional machining methods. Through the sliding connection structure between the bearing block and the side frame, and the automatic following function of the clamping components, automatic guidance and dynamic support of the spiral tap are achieved, reducing manual intervention, lowering operational difficulty and labor intensity, and improving machining efficiency and automation level. Thirdly, the connecting sleeve and mounting rod... The detachable connection structure, combined with the positioning design of the annular insert plate and annular groove, not only facilitates the quick installation and replacement of bearing sleeves of different specifications, but also enhances the equipment's adaptability to different processing environments and workpiece sizes, improving the device's versatility and flexibility. In addition, the application of the elastic buffer structure gives the clamping force a certain degree of adaptive adjustment capability, ensuring clamping stability while avoiding pipe deformation or damage caused by excessive clamping, further improving processing safety and workpiece integrity. Finally, the entire device has a compact structure and a high degree of modularity. The components are combined through standardized connection methods, facilitating maintenance, replacement, and mass production, and is suitable for tapered thread processing scenarios with various pipe diameters, materials, and process requirements. Attached Figure Description

[0014] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the accompanying drawings used in the description of the embodiments or the prior art will be briefly introduced below.

[0015] Figure 1 This is a schematic diagram of the overall main view structure of an embodiment of this utility model.

[0016] Figure 2 This is a side view structural diagram of an embodiment of the present utility model.

[0017] Figure 3 This is a schematic diagram of the clamping frame structure according to an embodiment of the present utility model.

[0018] Figure 4 This is a schematic diagram of the mounting rod structure according to an embodiment of the present utility model.

[0019] Figure 5 This is a schematic diagram of the bearing sleeve structure according to an embodiment of the present utility model.

[0020] 1. Mounting rod; 2. Bearing sleeve; 3. Connecting sleeve; 4. Annular insert plate; 5. Annular groove; 6. Arc plate; 7. Threaded rod; 8. Side frame; 9. Bearing block; 10. Slider; 11. Slide groove; 12. Compression spring; 13. Clamping frame; 14. Arc clamping plate; 15. Spiral tap; 16. Threaded groove. Detailed Implementation

[0021] The embodiments of the present invention are described in detail below. Examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, but should not be construed as limiting the present invention.

[0022] Please see Figure 1-5 .

[0023] A spiral tap for machining tapered threads on pipes includes a mounting rod 1, and a spiral tap 15 is fixedly connected to one end of the mounting rod 1. A bearing sleeve 2 is sleeved on one side of the mounting rod 1.

[0024] Both sides of the bearing sleeve 2 are fixedly connected to side frames 8, and the inner sides of the two side frames 8 are slidably connected to bearing blocks 9. One side of each of the two bearing blocks 9 is fixedly connected to a clamping frame 13. Both sides of the inner sides of the two clamping frames 13 are elastically connected to arc-shaped clamping plates 14. One side of each of the two bearing blocks 9 is elastically connected to the inner wall of the side frame 8. Both ends of the mounting rod 1 are fitted with connecting sleeves 3, and both ends of the bearing sleeve 2 are fixedly connected to annular insert plates 4. One side of each of the two connecting sleeves 3 is provided with annular grooves 5 for use with annular insert plates 4. Both connecting sleeves 3 are detachably connected to the mounting rod 1.

[0025] First, connect and fix one end of the mounting rod 1 to the spindle of the drilling machine to provide a power input foundation for the entire device. Then, adjust the position of the bearing sleeve 2 according to the specifications of the pipe to be processed, and lock it in place using the detachable connection structure between the two connecting sleeves 3 and the mounting rod 1, ensuring that the bearing sleeve 2 and the spiral tap 15 operate coaxially. Side frames 8 are fixedly connected to both sides of the bearing sleeve 2, and bearing blocks 9 are slidably connected inside the two side frames 8. A clamping frame 13 is provided on one side of the bearing block 9, and arc-shaped clamping plates 14 are connected to both sides of the inner side of the clamping frame 13 via an elastic structure. Simultaneously, a buffer connection is achieved between the bearing block 9 and the side frames 8 through elastic elements. When the tapered threading of the pipe begins... During operation, the spiral tap 15 is first aligned with the preset hole position on the workpiece. Then, the two clamping frames 13 are respectively inserted from both ends of the pipe. The arc-shaped clamping plate 14 automatically fits and clamps the outer wall of the pipe, which plays a role in auxiliary positioning and stable support. As the spiral tap 15 is driven into the workpiece by the drilling machine, the bearing block 9 slides in the direction of movement inside the side frame 8, so that the clamping structure can advance synchronously with the tap and will not hinder the processing. At the same time, the elastic connection structure can adapt to pipes of different diameters, improving the clamping adaptability and stability. In addition, if it is necessary to replace or maintain the clamping part, the bearing sleeve 2 can be disassembled to separate the two side frames 8 and the clamping components, realizing modular disassembly and assembly and improving maintenance efficiency.

[0026] Furthermore, an arc-shaped plate 6 is fixedly connected to one side of each of the two connecting sleeves 3, and a threaded rod 7 is provided on the top of each of the two arc-shaped plates 6. Threaded grooves 16 are provided on the arc-shaped plates 6 and one side of the mounting rod 1. When the mounting rod 1 and the connecting sleeve 3 are detachably connected, the arc-shaped plate 6 fits against the outer wall of the mounting rod 1, and is locked and fixed by screwing the threaded rod 7 into the threaded groove 16. This enhances the connection stability and torsional resistance between the connecting sleeve 3 and the mounting rod 1, thereby improving the overall structural stability and facilitating quick assembly and disassembly.

[0027] Furthermore, sliders 10 are fixedly connected to both sides of the two bearing blocks 9, and the sliders 10 are slidably connected to the inner wall of the side frame 8 through the sliding groove 11. During the sliding process of the bearing block 9 along the inside of the side frame 8, the sliders 10 are embedded in the sliding groove 11 and move along it, providing good guidance and limiting effect for the movement of the bearing block 9, preventing it from deviating or getting stuck during the sliding process, thereby achieving the effect of enhancing sliding accuracy and improving the stability of the structure operation.

[0028] Furthermore, each of the two bearing blocks 9 is fixedly connected to one side with a compression spring 12, and one end of each compression spring 12 is fixedly connected to the inner wall of the two side frames 8 respectively. During the clamping process of the clamping frame 13 clamping the pipe, the compression spring 12 provides a buffering and restoring force, so that the clamping structure can adapt to pipes of different diameters and maintain a stable clamping pressure. At the same time, after the tap is withdrawn from the machining, it automatically drives the bearing block 9 to reset, thereby achieving the effect of improving clamping adaptability and enhancing the self-adaptive ability of the structure.

[0029] Furthermore, the four sliders 10 are all clearance fit with the four slide grooves 11, which ensures smooth sliding of the bearing block 9 while effectively controlling the swaying amplitude during the sliding process. This avoids structural loosening or guide failure due to excessive assembly clearance, thereby achieving the effect of optimizing sliding performance, improving guide accuracy and structural durability.

[0030] Furthermore, one side of each of the four arc-shaped clamping plates 14 is rotatably connected to the inner wall of the two clamping frames 13 via torsion spring shafts, so that the arc-shaped clamping plates 14 can automatically adjust their angles according to the outer diameter of the pipe when clamping the pipe, ensuring that the clamping surface is fully in contact with the pipe wall. At the same time, they automatically spring back to their initial position when they are released from the clamping state, thereby achieving the effects of enhancing clamping adaptability, improving clamping efficiency and ease of operation.

[0031] In summary:

[0032] First, one end of the mounting rod 1 is connected and fixed to the main shaft of the drilling machine, providing a power input foundation for the entire device. Then, according to the specifications of the pipe to be processed, the position of the bearing sleeve 2 is adjusted, and it is positioned and locked using the detachable connection structure between the two connecting sleeves 3 and the mounting rod 1, ensuring that the bearing sleeve 2 and the spiral tap 15 maintain coaxial operation. The arc-shaped plate 6 fixed on one side of the connecting sleeve 3 fits against the outer wall of the mounting rod 1, and is locked in place by screwing the threaded rod 7 at the top into the threaded groove 16 on the arc-shaped plate 6 and the mounting rod 1, thereby enhancing the connection stability and torsional resistance between the connecting sleeve 3 and the mounting rod 1. The bearing sleeve 2 is fixed on both sides... The system has fixed side frames 8, with load-bearing blocks 9 slidably connected inside the two side frames 8. Slider blocks 10 are fixedly connected to both sides of the load-bearing blocks 9. The sliders 10 are embedded in grooves 11 opened in the inner wall of the side frames 8 and move along them, providing good guidance and limiting for the movement of the load-bearing blocks 9, preventing them from shifting or jamming during sliding. Simultaneously, a clamping frame 13 is provided on one side of the load-bearing block 9. Arc-shaped clamping plates 14 are elastically connected to both sides of the inner side of the clamping frame 13. One side of each of the four arc-shaped clamping plates 14 is rotatably connected to the inner wall of the two clamping frames 13 via torsion spring shafts, allowing the arc-shaped clamping plates 14 to adjust according to the outer diameter of the pipe when clamping it. The automatic angle adjustment ensures full contact between the clamping surface and the pipe wall. When starting tapered thread machining on the pipe, first align the spiral tap 15 with the preset hole position on the workpiece, then insert the two clamping frames 13 from both ends of the pipe. The arc-shaped clamping plate 14 automatically fits and clamps the outer wall of the pipe, providing auxiliary positioning and stable support. As the spiral tap 15 is driven into the workpiece by the drilling machine, the bearing block 9 slides along the direction of movement inside the side frame 8, allowing the clamping structure to advance synchronously with the tap without hindering the machining process. Simultaneously, the elastic connection structure can adapt to pipes of different diameters, improving clamping adaptability and stability. Furthermore, if replacement or... The maintenance clamping part can be separated by disassembling the bearing sleeve 2, thereby separating the two side frames 8 and the clamping assembly, realizing modular disassembly and assembly, improving maintenance efficiency. The bearing block 9 and the side frame 8 are also connected by a compression spring 12 for buffering. The compression spring 12 provides a restoring force, enabling the clamping structure to adapt to pipes of different diameters and maintain stable clamping pressure. At the same time, the bearing block 9 is automatically driven to reset after the tap is removed from the machining. The four sliders 10 are all clearance fit with the four slide grooves 11, which effectively controls the shaking amplitude during the sliding process while ensuring smooth sliding of the bearing block 9, and avoids structural loosening or guide failure due to excessive assembly clearance.The combination of the arc-shaped plate 6, threaded rod 7, and threaded groove 16 enhances the connection stability and torsional resistance between the connecting sleeve 3 and the mounting rod 1, improving the overall structural stability and ease of quick assembly and disassembly. Secondly, the combination of the slider 10 and the slide groove 11 provides good guidance and limiting for the bearing block 9, preventing it from shifting or jamming during sliding, significantly improving sliding accuracy and structural stability. Thirdly, the buffer reset design of the compression spring 12 allows the clamping structure to adapt to pipes of different diameters and maintain stable clamping pressure. Meanwhile, the bearing block 9 automatically resets after the tap exits the machining process, improving clamping adaptability and structural self-adaptability. In addition, the clearance fit between the four sliders 10 and the four grooves 11 optimizes the sliding performance, improves guiding accuracy and structural durability, and avoids structural loosening or guiding failure caused by excessive assembly clearance. Finally, through the cooperative design of the torsion spring shaft and the arc-shaped clamping plate 14, the arc-shaped clamping plate 14 can automatically adjust the angle according to the outer diameter of the pipe when clamping it, ensuring that the clamping surface is fully in contact with the pipe wall, which not only enhances clamping adaptability but also improves clamping efficiency and ease of operation.

[0033] The above-disclosed embodiments are merely one or more preferred embodiments of this application and should not be construed as limiting the scope of this application. Those skilled in the art can understand that all or part of the processes for implementing the above embodiments and equivalent changes made in accordance with the claims of this application still fall within the scope of this application.

Claims

1. A spiral tap for machining tapered threads on pipes, comprising a mounting rod, characterized in that, It also includes a spiral tap fixedly connected to one end of the mounting rod, and a bearing sleeve fitted on one side of the mounting rod; Both sides of the bearing sleeve are fixedly connected to side frames, and the inner sides of the two side frames are slidably connected to bearing blocks. One side of each of the two bearing blocks is fixedly connected to a clamping frame. Both sides of the inner sides of the two clamping frames are elastically connected to arc-shaped clamping plates. One side of each of the two bearing blocks is elastically connected to the inner wall of the side frame. Both ends of the mounting rod are fitted with connecting sleeves, and both ends of the bearing sleeve are fixedly connected to annular inserts. One side of each of the two connecting sleeves is provided with annular grooves for use with the annular inserts. Both connecting sleeves are detachably connected to the mounting rod.

2. The spiral tap for machining tapered threads on pipes as described in claim 1, characterized in that, Both of the connecting sleeves are fixedly connected to one side with an arc-shaped plate, and both arc-shaped plates are provided with threaded rods at the top, and threaded grooves are provided on one side of the arc-shaped plates and the mounting rods.

3. The spiral tap for machining tapered threads on pipes as described in claim 1, characterized in that, Both sides of the two bearing blocks are fixedly connected to sliders, and the sliders are slidably connected to the inner wall of the side frame through a sliding groove.

4. The spiral tap for machining tapered threads on pipes as described in claim 1, characterized in that, Each of the two bearing blocks is fixedly connected to one side with a compression spring, and one end of each compression spring is fixedly connected to the inner wall of the two side frames respectively.

5. A spiral tap for machining tapered threads on pipes as described in claim 3, characterized in that, The four sliders are all clearance fits with the four grooves.

6. The spiral tap for machining tapered threads on pipes as described in claim 1, characterized in that, One side of each of the four arc-shaped clamping plates is rotatably connected to the inner wall of the two clamping frames via a torsion spring pivot.

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