A CNC pipe threading lathe

Abstract

A CNC pipe threading lathe includes a body, a headstock mounted on top of the body, pneumatic chucks mounted on both sides of the headstock, a drive motor mounted on the side of the headstock, the output shaft of the drive motor being connected to the spindle inside the headstock, a tool post assembly at the front end of the headstock, and a chip removal groove below the tool post assembly; a length-stopping device mounted on top of the headstock, the length-stopping device including a support base fixedly mounted on the top of the headstock, a sleeve fixedly mounted on the support base, a first telescopic motor rotatably connected to the sleeve via a bearing, a gear mounted on the cylinder end of the first telescopic motor, and an L-shaped stop fixedly mounted on the telescopic shaft end of the first telescopic motor; a second telescopic motor mounted on top of the headstock, a rack fixedly mounted on the telescopic end of the second telescopic motor, the rack meshing with the gear. This invention overcomes the shortcomings of the prior art, enabling rapid adaptability to pipes of different lengths and specifications, greatly improving processing efficiency.

Description

Technical Field

[0001] This utility model relates to the field of machinery, and in particular to thread processing equipment, specifically a CNC pipe threading lathe. Background Technology

[0002] A threading lathe is a machine tool used for turning threads. Short threading lathes, pipe threading lathes, and oil pipe fitting threading lathes are used for turning short threaded workpieces and threads on oil pipes and casings used in oil and geological drilling. Precision lead screw lathes are mainly used in the machine tool manufacturing industry for machining precision threads. Pipe threading lathes generally have a large through hole in the headstock; the workpiece passes through the through hole and is clamped by two chucks located at both ends of the spindle for rotational motion.

[0003] In existing technologies for machining pipe threads, the long length of the pipe makes axial positioning of the workpiece impossible. Conventional positioning methods require installing a positioning device equipped with a lead screw or hydraulic cylinder for axial movement on the machine tool. However, this firstly requires ample installation space on the machine tool, resulting in a complex machine tool structure and large footprint; secondly, due to the machining of different specifications of pipe threads and different lengths of pipe materials, the positioning device program needs to be readjusted during production changes, significantly reducing machining efficiency. Utility Model Content

[0004] In view of the shortcomings of the prior art, this utility model provides a CNC pipe threading lathe that overcomes the deficiencies of the prior art. It is reasonably designed and can quickly adapt to pipes of different lengths and specifications, greatly improving processing efficiency.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] A CNC pipe threading lathe includes a body, a spindle box fixedly mounted on the top of the body, pneumatic chucks fixedly mounted on both the left and right sides of the spindle box, a drive motor disposed on the side of the spindle box, the output shaft of the drive motor being connected to the spindle inside the spindle box, a tool post assembly disposed at the front end of the spindle box, and a chip removal groove disposed below the tool post assembly, the chip removal groove being disposed along the length direction of the body.

[0007] The spindle box is equipped with a length-fixing device, which includes a support base fixedly mounted on the top of the spindle box. A sleeve is fixedly mounted on the support base, and a first telescopic motor is rotatably connected to the sleeve via a bearing. A gear is coaxially fixedly mounted on the cylinder end of the first telescopic motor, and an L-shaped stop bar is fixedly mounted on the telescopic shaft end of the first telescopic motor. The telescopic direction of the first telescopic motor is parallel to the axis of the spindle box. A second telescopic motor is fixedly mounted on the top of the spindle box, and a rack is fixedly mounted on the telescopic end of the second telescopic motor, with the rack meshing with the gear.

[0008] Preferably, the tool holder assembly includes an inclined seat, on which an X-axis slide rail is horizontally fixedly mounted. The X-axis slide rail is arranged along the length direction of the vehicle body. An X-axis slide plate is slidably connected to the X-axis slide rail via a slider. An inclined slide rail is fixedly mounted on the X-axis slide plate. The length direction of the inclined slide rail is perpendicular to the length direction of the vehicle body. A tool holder is slidably connected to the inclined slide rail. A lathe tool is detachably mounted at the front end of the tool holder. The tip of the lathe tool is oriented towards the central axis of the spindle box.

[0009] Preferably, a conveyor belt is installed inside the chip removal trough, the conveyor belt is arranged along the length of the chip removal trough, and the output end of the conveyor belt cooperates with the chip collection box outside the chip removal trough.

[0010] Preferably, a protective cover is fixedly installed on the top of the vehicle body, and the main spindle box, drive motor, tool holder assembly and length-stopping device are all located inside the protective cover.

[0011] This invention provides a CNC pipe threading lathe with the following advantages: By controlling the extension or retraction of the first telescopic motor to adjust the position of the L-shaped stop, the feed length of the pipe is limited, achieving fixed-length processing. Furthermore, after processing, the second telescopic motor can be started, driving the rack to move, thus rotating the gears, which in turn drives the first telescopic motor to rotate, causing the L-shaped stop to rotate synchronously and disengage from the pipe's limiting area, facilitating the smooth removal of the processed pipe. Through the linkage design of the L-shaped stop and the first telescopic motor, rapid adaptability to pipes of different lengths and specifications is achieved, eliminating the need for repeated manual measurement and positioning, greatly improving processing efficiency and automation. Attached Figure Description

[0012] To more clearly illustrate the technical solutions in this utility model or the prior art, the accompanying drawings used in the description of this utility model or the prior art will be briefly introduced below.

[0013] Figure 1 A schematic diagram of the structure of this utility model;

[0014] Figure 2 A schematic diagram of the internal structure of the protective cover in this utility model;

[0015] Figure 3 A schematic diagram of the fixed-length material-stopping device in this utility model;

[0016] Figure 4 A schematic diagram of the tool holder assembly in this utility model;

[0017] Explanation of the labels in the diagram:

[0018] 1. Body; 2. Spindle box; 3. Pneumatic chuck; 4. Drive motor; 5. Tool holder assembly; 6. Chip conveyor; 7. Length stop device; 8. Conveyor belt; 9. Protective cover; 51. Inclined seat; 52. X-axis slide rail; 53. X-axis slide plate; 54. Inclined slide rail; 55. Tool holder; 56. Lathe tool; 71. Support seat; 72. Sleeve; 73. First telescopic motor; 74. Gear; 75. L-shaped stop lever; 76. Second telescopic motor; 77. Rack. Detailed Implementation

[0019] To make the objectives, technical solutions, and advantages of this utility model clearer, the technical solutions of this utility model will be clearly and completely described below with reference to the accompanying drawings.

[0020] Example 1, as Figure 1-4 As shown, a CNC pipe threading lathe includes a body 1, a spindle box 2 fixedly installed on the top of the body 1, pneumatic chucks 3 fixedly installed on both the left and right sides of the spindle box 2, a drive motor 4 provided on the side of the spindle box 2, the output shaft of the drive motor 4 being connected to the spindle inside the spindle box 2, a tool post assembly 5 provided at the front end of the spindle box 2, a chip removal groove 6 provided below the tool post assembly 5, and the chip removal groove 6 being provided along the length direction of the body 1;

[0021] A length-fixing device 7 is installed above the spindle box 2. The length-fixing device 7 includes a support base 71, which is fixedly installed on the top of the spindle box 2. A sleeve 72 is fixedly installed on the support base 71. A first telescopic motor 73 is rotatably connected to the sleeve 72 through a bearing. A gear 74 is coaxially fixedly installed at the cylinder end of the first telescopic motor 73. An L-shaped stop bar 75 is fixedly installed at the telescopic shaft end of the first telescopic motor 73. The telescopic direction of the first telescopic motor 73 is parallel to the axis of the spindle box 2. A second telescopic motor 76 is fixedly installed on the top of the spindle box 2. A rack 77 is fixedly installed at the telescopic end of the second telescopic motor 76. The rack 77 meshes with the gear 74.

[0022] In this embodiment, the spindle box 2 is a conventional component in the existing structure, which specifically includes a housing, a hollow spindle, and bearings. The hollow spindle is rotatably connected inside the housing through the bearings, and both ends of the hollow spindle protrude from the housing and are fixedly connected to two pneumatic chucks 3 respectively. A driven gear is coaxially fixedly installed on the outer surface of one end of the hollow spindle, and a driving gear is fixedly installed on the output shaft of the drive motor 4. The driving gear and the driven gear are connected in a transmission manner.

[0023] Working principle:

[0024] During use, the position of the L-shaped stop 75 can be adjusted by controlling the extension or retraction of the telescopic end of the first telescopic motor 73 to limit the feed length of the pipe and achieve fixed-length processing, according to the thread processing requirements of the pipe to be processed. Then, the end of the pipe to be processed is passed through the hollow spindle in the middle of the spindle box 2, and the L-shaped stop 75 acts as a limiting stop to achieve precise control of the pipe feed length. Finally, the pneumatic chucks 3 at both ends of the hollow spindle are controlled to clamp and fix the pipe, ensuring the stability of the processing.

[0025] During processing, the drive motor 4 is controlled to rotate, which in turn drives the driven gear to rotate synchronously, thereby achieving the rotation of the hollow spindle. The hollow spindle drives the pneumatic chucks 3 at both ends to rotate synchronously, and the clamped tube rotates accordingly. At the same time, the tool holder assembly 5 moves laterally or longitudinally according to a preset program, so that the tool can precisely cut the surface of the rotating tube, ensuring the accuracy and quality of thread forming. The chips generated during processing are smoothly discharged through the chip removal groove 6, effectively preventing chip accumulation from affecting processing accuracy or damaging the tool.

[0026] After processing is completed, the second telescopic motor 76 can be started to move the rack 77, thereby rotating the gear 74, which in turn drives the first telescopic motor 73 to rotate. This causes the L-shaped stop bar 75 to rotate synchronously, disengaging it from the pipe's limiting area, facilitating the smooth removal of the processed pipe. Then, the pneumatic chuck 3 is released to remove the processed pipe from the hollow spindle, completing the entire processing procedure.

[0027] The entire device is compact and easy to operate, effectively improving the efficiency and accuracy of pipe thread processing while ensuring the stability and safety of the processing. It is suitable for the high-efficiency processing needs of large batches of pipes. In addition, through the linkage design of the L-shaped stop bar 75 and the first telescopic motor 73, it is possible to quickly adapt to pipes of different lengths and specifications without the need for repeated manual measurement and positioning, greatly improving processing efficiency and automation.

[0028] In Embodiment Two, as a further preferred embodiment of Embodiment One, the tool holder assembly 5 includes a slanted seat 51. An X-axis slide rail 52 is horizontally fixedly mounted on the slanted surface of the slanted seat 51. The X-axis slide rail 52 is arranged along the length direction of the vehicle body 1. An X-axis slide plate 53 is slidably connected to the X-axis slide rail 52 via a slider. A slanted slide rail 54 is fixedly mounted on the X-axis slide plate 53. The length direction of the slanted slide rail 54 is perpendicular to the length direction of the vehicle body 1. A tool holder 55 is slidably connected to the slanted slide rail 54. A turning tool 56 is detachably mounted on the front end of the tool holder 55, with the tool tip facing the central axis of the spindle box 2. In this embodiment, an X-axis lead screw transmission structure can be installed on the slanted seat 51 parallel to the X-axis slide rail 52. A servo motor drives the X-axis lead screw to rotate, causing the tool holder 55 to move precisely along the slanted slide rail 54, thereby achieving high-precision positioning and movement of the tool in the X-axis direction. Meanwhile, the X-axis slide plate 53 is equipped with a sloping screw transmission structure parallel to the sloping slide rail 54. The sloping screw is driven to rotate by a servo motor, which drives the tool holder 55 to move precisely along the sloping slide rail 54, thereby achieving high-precision positioning and movement of the tool in the sloping direction.

[0029] Therefore, when controlling the tool holder assembly 5 to cut the pipe surface, the cutting angle and depth of the cutting tool 56 can be adjusted by driving the tool holder 55 to slide along the inclined slide rail 54, thereby achieving high-precision thread processing on the pipe surface. The design of the inclined seat 51 makes the cutting tool 56 more evenly stressed during the cutting process, effectively improving the accuracy and consistency of thread forming. At the same time, the X-axis slide plate 53 can move flexibly on the X-axis slide rail 52 to adjust the feed of the cutting tool 56, thereby adapting to the processing needs of pipes of different specifications.

[0030] In Example 3, as a further preferred embodiment of Example 1, a conveyor belt 8 is installed inside the chip removal trough 6. The conveyor belt 8 is arranged along the length of the chip removal trough 6, and its output end cooperates with the chip collection box on the outside of the chip removal trough 6. By setting up the conveyor belt 8, the chips generated during processing can be promptly transported to the chip collection box, effectively preventing chip accumulation. In addition, the conveyor belt 8 is driven by an independent motor, and its conveying speed can be adjusted according to the processing rhythm to ensure that the chip removal efficiency matches the processing cycle. Through the synergistic effect of the conveyor belt 8 and the chip collection box, not only is the frequency of manual cleaning reduced, but the internal structure of the equipment is also effectively protected from chip erosion, extending the service life of the equipment.

[0031] In Example 4, as a further preferred embodiment of Example 1, a protective cover 9 is fixedly installed on top of the machine body 1. The spindle box 2, drive motor 4, tool holder assembly 5, and length-stopping device 7 are all located inside the protective cover 9. The protective cover 9 effectively protects the cutting tool 56, preventing damage to equipment or personal injury caused by flying chips during processing. One side of the protective cover 9 has an openable inspection door for easy daily maintenance and cleaning of the internal structure.

[0032] The above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. A CNC pipe threading lathe, comprising a body (1), a spindle box (2) fixedly mounted on the top of the body (1), pneumatic chucks (3) fixedly mounted on both the left and right sides of the spindle box (2), a drive motor (4) provided on the side of the spindle box (2), the output shaft of the drive motor (4) being connected to the spindle inside the spindle box (2), a tool post assembly (5) provided at the front end of the spindle box (2), a chip removal groove (6) provided below the tool post assembly (5), the chip removal groove (6) being provided along the length direction of the body (1), characterized in that: A length-fixing device (7) is installed above the spindle box (2). The length-fixing device (7) includes a support base (71). The support base (71) is fixedly installed on the top of the spindle box (2). A sleeve (72) is fixedly installed on the support base (71). A first telescopic motor (73) is rotatably connected to the sleeve (72) through a bearing. A gear (74) is fixedly installed coaxially at the cylinder end of the first telescopic motor (73). An L-shaped stop bar (75) is fixedly installed at the telescopic shaft end of the first telescopic motor (73). The telescopic direction of the first telescopic motor (73) is parallel to the axis of the spindle box (2). A second telescopic motor (76) is fixedly installed on the top of the spindle box (2). A rack (77) is fixedly installed at the telescopic end of the second telescopic motor (76). The rack (77) meshes with the gear (74).

2. The CNC pipe threading lathe according to claim 1, characterized in that: The tool holder assembly (5) includes a slant seat (51), on which an X-axis slide rail (52) is horizontally fixedly mounted. The X-axis slide rail (52) is arranged along the length direction of the vehicle body (1). An X-axis slide plate (53) is slidably connected to the X-axis slide rail (52) via a slider. A slant slide rail (54) is fixedly mounted on the X-axis slide plate (53). The length direction of the slant slide rail (54) is perpendicular to the length direction of the vehicle body (1). A tool holder (55) is slidably connected to the slant slide rail (54). A lathe tool (56) is detachably mounted at the front end of the tool holder (55). The tip of the lathe tool (56) is set towards the central axis of the spindle box (2).

3. A CNC pipe threading lathe according to claim 1, characterized in that: A conveyor belt (8) is installed inside the chip discharge trough (6). The conveyor belt (8) is arranged along the length of the chip discharge trough (6). The output end of the conveyor belt (8) is matched with the chip collection box outside the chip discharge trough (6).

4. A CNC pipe threading lathe according to claim 1, characterized in that: A protective cover (9) is fixedly installed on the top of the vehicle body (1). The main shaft box (2), drive motor (4), tool holder assembly (5) and length-stopping device (7) are all located inside the protective cover (9).

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