A tap feeding and discharging integrated numerical control thread processing machine tool

Abstract

The application discloses a tap feeding and discharging integrated numerical control thread processing machine tool and belongs to the technical field of thread processing equipment. The machine tool comprises a workbench, a numerical control grinding machine and a rotatable transposition gear ring are arranged on the workbench, and a plurality of tap clamps are uniformly arranged in the circumferential direction of the transposition gear ring. The workbench is provided with a matched feeding guide rail, a first arc-shaped gear rack, a second arc-shaped gear rack and a discharging slide, and a fourth gear is integrated at the bottom of the tap clamp and can be engaged and driven with the two types of arc-shaped gear racks. The tap workpiece is automatically clamped and loosened through the rotation of the transposition gear ring to drive the clamp station switching, the engagement and driving of the arc-shaped gear rack and the gear are utilized, the precise tap thread grinding processing is completed by matching the eccentric grinding structure, the automatic feeding and discharging and the integrated grinding processing are integrated, manual intervention is not needed, the problems of complicated feeding and discharging, low processing efficiency and poor positioning accuracy of the traditional tap processing equipment are solved, the structure is compact, the operation is stable, and the machine tool is suitable for batch tap thread processing operation.

Description

Technical Field

[0001] This invention relates to the field of thread processing equipment technology, and in particular to a CNC thread processing machine tool that integrates tap loading and unloading. Background Technology

[0002] Taps are commonly used internal thread cutting tools in machining, and their thread accuracy directly determines the machining quality of the workpiece's internal thread. Currently, most traditional tap threading machine tools adopt a split machining mode, with loading and unloading and grinding operations being independent of each other. The machining process requires manual assistance to complete operations such as workpiece clamping, disassembly, and repositioning, resulting in a very low degree of automation.

[0003] The existing equipment has many defects in the processing: First, the consistency of manual clamping and positioning is poor, and clamping deviations are prone to occur, resulting in inconsistent accuracy of tap thread processing and a high scrap rate; Second, the split operation process is cumbersome, and the switching of workstations and loading and unloading of workpieces take a long time, which cannot meet the needs of large-scale tap processing production and results in low production efficiency; Third, the continuous manual operation of the equipment is labor-intensive and poses mechanical operation safety hazards.

[0004] Therefore, there is an urgent need to design an integrated CNC thread processing machine tool that combines automatic loading and unloading, automatic clamping and positioning, and precise thread grinding to solve many of the shortcomings of existing technologies. Summary of the Invention

[0005] The technical problem to be solved by this invention is that traditional polishing devices cannot be adapted to the processing of the inner wall of bent pipes, the deformation of flexible polishing structures is uncontrollable, the pipe diameter is inconvenient to adjust, and the polishing accuracy is low. To address this, we propose a CNC thread processing machine tool that integrates tap loading and unloading.

[0006] To achieve the above objectives, this application adopts the following technical solution: A CNC thread cutting machine tool integrating tap loading and unloading includes a worktable, on which a CNC grinding machine is mounted. The CNC grinding machine is equipped with a spindle box that moves vertically. A first motor is fixedly mounted on the spindle box. An eccentric arm is fixedly connected to the output end of the first motor. A grinding wheel shaft is rotatably connected to the end of the eccentric arm. A grinding wheel is fixedly mounted on the lower end of the grinding wheel shaft. A first gear is fixedly connected to the upper end of the grinding wheel shaft. A second gear is fixedly connected to the lower end of the spindle box. The first gear and the second gear mesh with each other. A fixed ring is fixedly installed on the workbench, and a shifting gear ring is rotatably fitted on the outer side of the fixed ring. A second motor is fixedly installed on the workbench, and a third gear is fixedly connected to the output end of the second motor. The third gear meshes with the shifting gear ring. The shifting gear ring is evenly arranged with several tap clamps. The tap clamps include a fixed sleeve that is fixedly connected to the shifting gear ring. A spring collet and a threaded cylinder are provided inside the fixed sleeve. The threaded cylinder is threadedly engaged with the fixed sleeve. A fourth gear is integrally formed at the lower end of the threaded cylinder. The side wall of the fixed sleeve is provided with a clamping opening slot for the shank of the tap workpiece to enter. The worktable is equipped with a feeding guide rail at the feeding station corresponding to the shifting gear ring; The arc-shaped conveying section below the shifting gear ring, corresponding to the loading station, is equipped with a first arc-shaped rack with the tooth tip facing inward. The first arc-shaped rack meshes with the fourth gear and drives the threaded cylinder to move upward relative to the fixed sleeve, so that the spring collet clamps the tap workpiece. Below the shifting gear ring, corresponding to the downstream station of the grinding station, there is a second arc-shaped rack with the tooth tip facing outward. The second arc-shaped rack meshes with the fourth gear and drives the threaded cylinder to move downward relative to the fixed sleeve, so that the spring collet releases the tap workpiece. A material discharge chute is provided below the end of the second arc-shaped rack.

[0007] Furthermore, a CNC grinding machine is slidably mounted on the worktable via guide rails, and the spindle box is slidably mounted on the CNC grinding machine in the vertical direction, driving the grinding wheel to complete the vertical feed action.

[0008] Furthermore, the output shaft of the first motor is arranged vertically, the eccentric arm is set perpendicular to the output shaft of the first motor, the axis of the grinding wheel shaft is perpendicular to the length direction of the eccentric arm, and the second gear is coaxially fixed to the lower end face of the spindle box with the output shaft of the first motor.

[0009] Furthermore, the fixed ring is fixedly connected to the worktable, the shifting gear ring is rotatably connected to the outer wall of the fixed ring through a bearing, the third gear meshes with the outer teeth of the shifting gear ring, and the second motor drives the shifting gear ring to rotate clockwise through the third gear.

[0010] Furthermore, the upper inner wall of the fixed sleeve is provided with a tapered contraction section, the outer wall of the spring collet is adapted to the tapered surface of the tapered contraction section, a pressure spring is abutting between the spring collet and the threaded cylinder, and the interiors of the spring collet, the threaded cylinder and the fourth gear are coaxially connected to form an axial channel for the tap workpiece to fall.

[0011] Furthermore, the clamping opening slot is opened on the upper side wall of the fixed sleeve, and the opening of the clamping opening slot faces the tangential direction of the shifting gear ring. All the clamping opening slots of the tap clamps are opened in the same direction along the clockwise rotation direction of the shifting gear ring.

[0012] Furthermore, the feeding guide rail is divided into a straight guide rail section and an arc-shaped guide rail section. The straight guide rail section is used for horizontally conveying tap workpieces, while the arc-shaped guide rail section is arranged coaxially with the shifting gear ring. The starting end of the arc-shaped guide rail section is smoothly connected to the straight guide rail section, and the end extends to the upstream side of the grinding station.

[0013] Furthermore, the first arc-shaped rack is fixedly installed on the worktable and located below the shifting gear ring. The arc length of the first arc-shaped rack is consistent with the arc length of the arc-shaped guide rail section, and the tooth tip of the first arc-shaped rack faces the center of the shifting gear ring. When the tap clamp moves along the arc-shaped guide rail section with the shifting gear ring, the fourth gear meshes with the first arc-shaped rack, driving the threaded cylinder to rotate upward relative to the fixed sleeve.

[0014] Furthermore, the second arc-shaped rack is fixedly installed on the worktable and located below the shifting gear ring. The second arc-shaped rack is arranged clockwise downstream of the grinding station. The tooth tip of the second arc-shaped rack faces away from the center of the shifting gear ring, and the arc length of the second arc-shaped rack is equal to the arc length of the first arc-shaped rack. When the tap chuck moves along the second arc-shaped rack with the shifting gear ring, the fourth gear meshes with the second arc-shaped rack, driving the threaded sleeve to rotate downward relative to the fixed sleeve.

[0015] Furthermore, the discharge slide is inclinedly arranged below the end of the second arc-shaped rack. When the tap clamp moves to the end of the second arc-shaped rack, the spring chuck completely releases the tap workpiece. The tap workpiece falls through the axial channel inside the tap clamp to the discharge slide and is discharged and collected by the discharge slide.

[0016] The technical effects and advantages of this invention are as follows: 1. This invention adopts an integrated workstation rotation structure, which realizes automatic switching of workpiece loading, grinding and unloading workstations through the rotation of the shifting gear ring. Combined with the mechanical meshing transmission of the arc rack and gear, the workpiece can be automatically clamped and released without the need for electrical control assistance. The whole process is automated and requires no manual intervention, which greatly improves processing efficiency and reduces the intensity of manual labor.

[0017] 2. The present invention adopts an eccentric gear transmission grinding structure. The grinding wheel can revolve around the tap workpiece with the eccentric arm, and can also achieve high-speed rotation through the meshing of the first and second gears. With the vertical feed of the spindle box, it can accurately match the pitch processing requirements of taps of different specifications, with high processing accuracy and strong versatility. Attached Figure Description

[0018] The disclosure of this invention is illustrated with reference to the accompanying drawings. It should be understood that the drawings are for illustrative purposes only and are not intended to limit the scope of protection of this invention. In the drawings, the same reference numerals are used to refer to the same parts: Figure 1 This is a schematic diagram of the external structure of the present invention; Figure 2 This is a schematic diagram of the CNC grinding machine structure of the present invention; Figure 3 This is a schematic diagram of the tap clamp structure of the present invention; Figure 4 This is a cross-sectional view of the tap clamp of the present invention; Figure 5 This is a schematic diagram of the first and second arc-shaped racks of the present invention.

[0019] Legend: 1. Worktable; 2. CNC grinding machine; 3. Spindle box; 4. First motor; 5. Eccentric arm; 6. Grinding wheel spindle; 7. Grinding wheel; 8. First gear; 9. Second gear; 10. Fixing ring; 11. Shifting gear ring; 12. Second motor; 13. Third gear; 14. Tap clamp; 1401. Fixing sleeve; 1402. Spring collet; 1403. Compression spring; 1404. Threaded cylinder; 1405. Fourth gear; 1406. Clamping slot; 15. Tap workpiece; 16. Feeding guide rail; 1601. Straight guide rail section; 1602. Arc-shaped guide rail section; 17. First arc-shaped rack; 18. Second arc-shaped rack; 19. Unloading slide. Detailed Implementation

[0020] The technical solutions of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. The components of this application described and shown in the accompanying drawings can generally be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of this application provided in the accompanying drawings is not intended to limit the scope of this application, but merely represents selected embodiments of this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application. It should be noted that similar reference numerals and letters in the following drawings indicate similar items; therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings. Furthermore, in the description of this application, the terms "first," "second," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0021] Example 1: This example is a basic complete implementation plan for a machine tool, illustrating the connection relationship and basic operation mode of the various mechanisms of the whole machine.

[0022] A CNC thread cutting machine tool integrating tap loading and unloading includes a worktable 1, on which a CNC grinding machine 2 is mounted. The CNC grinding machine 2 is provided with a spindle box 3 that moves vertically. A first motor 4 is fixedly mounted on the spindle box 3. An eccentric arm 5 is fixedly connected to the output end of the first motor 4. A grinding wheel shaft 6 is rotatably connected to the end of the eccentric arm 5. A grinding wheel 7 is fixedly mounted on the lower end of the grinding wheel shaft 6. A first gear 8 is fixedly connected to the upper end of the grinding wheel shaft 6. A second gear 9 is fixedly connected to the lower end of the spindle box 3. The first gear 8 and the second gear 9 mesh with each other.

[0023] A fixed ring 10 is fixedly installed on the workbench 1. A shifting gear ring 11 is rotatably fitted on the outer side of the fixed ring 10. A second motor 12 is fixedly installed on the workbench 1. A third gear 13 is fixedly connected to the output end of the second motor 12. The third gear 13 meshes with the shifting gear ring 11.

[0024] The shifting gear ring 11 is circumferentially arranged with a plurality of tap clamps 14. Each tap clamp 14 includes a fixed sleeve 1401 fixedly connected to the shifting gear ring 11. The fixed sleeve 1401 is provided with a spring collet 1402 and a threaded cylinder 1404. The threaded cylinder 1404 is threadedly engaged with the fixed sleeve 1401. The lower end of the threaded cylinder 1404 is integrally formed with a fourth gear 1405. The side wall of the fixed sleeve 1401 is provided with a clamping opening slot 1406 for the shank of the tap workpiece 15 to enter.

[0025] The workbench 1 is provided with a feeding guide rail 16 corresponding to the feeding station of the shifting gear ring 11; the arc-shaped conveying section below the shifting gear ring 11 corresponding to the feeding station is provided with a first arc-shaped rack 17 with the tooth tip facing inward. The first arc-shaped rack 17 meshes with the fourth gear 1405 and drives the threaded cylinder 1404 to move upward relative to the fixed sleeve 1401, so that the spring collet 1402 clamps the tap workpiece 15.

[0026] Below the shifting gear ring 11, corresponding to the downstream station of the grinding station, there is a second arc-shaped rack 18 with the tooth tip facing outward. The second arc-shaped rack 18 meshes with the fourth gear 1405 and drives the threaded cylinder 1404 to move downward relative to the fixed sleeve 1401, so that the spring collet 1402 releases the tap workpiece 15. A material drop slide 19 is provided below the end of the second arc-shaped rack 18.

[0027] In this embodiment, the upper inner wall of the fixed sleeve 1401 is provided with a tapered contraction section. The outer wall of the spring collet 1402 is adapted to the tapered surface of the tapered contraction section. A pressure spring 1403 abuts between the spring collet 1402 and the threaded cylinder 1404. The spring collet 1402, the threaded cylinder 1404, and the fourth gear 1405 are coaxially connected to form an axial channel for the tap workpiece 15 to fall. The feeding guide rail 16 is divided into a straight guide rail section 1601 and an arc-shaped guide rail section 1602. The straight guide rail section 1601 is used for horizontally conveying the tap workpiece 15, and the arc-shaped guide rail section 1602 is arranged coaxially with the shifting gear ring 11.

[0028] During operation, the tap workpiece 15 is conveyed from the straight guide rail section 1601 to the arc-shaped guide rail section 1602. The shifting gear ring 11 drives the tap clamp 14 to rotate, and the shank of the tap workpiece 15 is inserted into the clamping opening slot 1406. The fourth gear 1405 meshes with the first arc-shaped rack 17, driving the threaded cylinder 1404 to move upward to press the spring collet 1402 to complete the clamping. After the workpiece is transferred to the grinding station, the first motor 4 drives the eccentric arm 5 to drive the grinding wheel 7 to revolve. At the same time, the first gear 8 rolls along the second gear 9 to achieve rotation, which, together with the spindle box 3, vertically feeds to complete the thread grinding. After processing, the workpiece is transferred to the unloading station. The fourth gear 1405 meshes with the second arc-shaped rack 18 to release the clamp, and the workpiece falls into the unloading slide 19 to complete the unloading.

[0029] Example 2: Based on Example 1, this example optimizes the feed mechanism of the CNC grinding machine 2 with multiple degrees of freedom to improve the adjustment range and adaptability of grinding.

[0030] A CNC grinding machine 2 is slidably mounted on the worktable 1 via an X-axis linear guide rail. The CNC grinding machine 2 can slide horizontally along the X-axis of the worktable 1 to adjust the radial position of the grinding wheel 7 relative to the tap workpiece 15, adapting to the grinding tool setting requirements of taps with different diameters. A Z-axis precision guide rail is provided on the column of the CNC grinding machine 2. The spindle box 3 is slidably mounted on the CNC grinding machine 2 along the Z-axis guide rail and is driven by a servo ball screw mechanism to drive the grinding wheel 7 to complete the vertical feed and retraction actions.

[0031] The lower end face of the spindle box 3 is provided with a circumferentially adjustable mounting seat. The second gear 9 is fixedly mounted on the adjustable mounting seat. By rotating the adjustable mounting seat, the circumferential phase of the second gear 9 can be slightly adjusted, thereby correcting the initial grinding angle of the grinding wheel 7 and compensating for the machining error caused by the gear meshing clearance. The eccentric arm 5 is provided with an adjustment groove in the length direction. The grinding wheel shaft 6 is fixed in the adjustment groove by locking bolts. The installation position can be adjusted along the length direction of the eccentric arm 5 to change the revolution and rotation radius of the grinding wheel 7 and adapt to the machining of taps with different nominal diameters.

[0032] In this embodiment, the first motor 4 is a servo spindle motor with continuously adjustable output speed. Combined with the Z-axis feed rate linkage control of the spindle box 3, the ratio of the revolution speed to the axial feed speed can be changed to flexibly match the tap machining parameters for different pitches, enabling multi-specification pitch machining without changing gears. The combination of X-axis and Z-axis dual-degree-of-freedom guideways and an adjustable eccentricity structure significantly expands the machine tool's machining adaptability range and reduces changeover and adjustment time.

[0033] Example 3: Based on Example 1, this example adopts a modular quick-assembly design for the shifting gear ring 11 and the tap clamp 14 to improve the maintenance efficiency and changeover flexibility of the equipment.

[0034] The fixed ring 10 is detachably fixed to the workbench 1 by bolts. The shifting gear ring 11 is rotatably connected to the outer wall of the fixed ring 10 by a cross roller bearing. The bearing has strong load-bearing capacity and high rotational accuracy. The outer circumference of the shifting gear ring 11 is provided with equidistantly distributed clamp installation interfaces. The upper end of the fixed sleeve 1401 of each tap clamp 14 is provided with a flange installation edge, which is fixed to the installation interface of the shifting gear ring 11 by quick-release bolts. A single set of tap clamps 14 can be disassembled and replaced independently without disassembling the entire shifting mechanism.

[0035] The spring collet 1402 inside the fixed sleeve 1401 adopts a split quick-change structure. The upper end of the spring collet 1402 is a clamping section and the lower end is a guide section. The guide section abuts against the pressure spring 1403. Spring collets 1402 with different inner diameter specifications can be directly removed and replaced from the upper end of the fixed sleeve 1401 to adapt to tap workpieces 15 with different shank diameters. The entrance of the clamping opening slot 1406 is provided with a chamfered guide structure to reduce the risk of jamming when the tap workpiece 15 enters the slot and improve the smoothness of feeding.

[0036] In this embodiment, both the first arc-shaped rack 17 and the second arc-shaped rack 18 are fixed on the workbench 1 by adjustable supports. The adjustable supports can finely adjust the installation position of the racks radially to compensate for gear meshing clearance and ensure the stroke accuracy of clamping and loosening actions. Through modular quick-assembly design, fixture maintenance and specification replacement can be completed in a short time, effectively reducing equipment downtime and adapting to multi-variety, small-batch processing production mode.

[0037] Example 4: Based on Example 1, this example adds a detection sensing unit and an intelligent control system to achieve precise indexing of the workstation and closed-loop control of processing quality.

[0038] The second motor 12 is a servo indexing motor, which works with the third gear 13 to drive the shifting gear ring 11 to perform intermittent indexing rotation. A photoelectric positioning sensor is set on the worktable 1 corresponding to the grinding station. When the tap fixture 14 rotates to the position directly below the grinding station, the sensor triggers a signal, and the second motor 12 is braked and locked to ensure that the coaxiality error between the tap workpiece 15 and the grinding wheel 7 is controlled within the set range.

[0039] The spindle box 3 of the CNC grinding machine 2 is equipped with a vision inspection probe, which can detect the clamping position of the tap workpiece 15 before grinding. If workpiece clamping deviation is detected, the system issues an alarm signal and skips the station to avoid scrapping. After grinding, the vision inspection probe can perform online detection of the thread profile and feed the detection data back to the control system to automatically correct the grinding feed parameters of the next workpiece, realizing closed-loop adjustment of machining quality.

[0040] In this embodiment, a workpiece counting sensor is installed at the entrance of the feeding guide rail 16. The control system automatically adjusts the rotation speed of the shifting gear ring 11 and the processing cycle of the grinding station according to the workpiece feeding frequency, thereby achieving matching of the feeding, processing, and unloading cycles. A qualified and defective product sorting mechanism is installed on the unloading slide 19, which automatically separates products based on online detection results, improving finished product sorting efficiency. Through integrated detection and intelligent indexing control, the automation level and processing stability of the machine tool are further improved.

[0041] The above are merely embodiments of this application and are not intended to limit the scope of protection of this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the scope of protection of this application.

Claims

1. A CNC thread cutting machine tool integrating tap loading and unloading, comprising a worktable, characterized in that: A CNC grinding machine is mounted on the worktable. The CNC grinding machine is equipped with a spindle box that moves vertically. A first motor is fixedly mounted on the spindle box. An eccentric arm is fixedly connected to the output end of the first motor. A grinding wheel shaft is rotatably connected to the end of the eccentric arm. A grinding wheel is fixedly mounted on the lower end of the grinding wheel shaft. A first gear is fixedly connected to the upper end of the grinding wheel shaft. A second gear is fixedly connected to the lower end of the spindle box. The first gear and the second gear mesh with each other. A fixed ring is fixedly installed on the workbench, and a shifting gear ring is rotatably fitted on the outer side of the fixed ring. A second motor is fixedly installed on the workbench, and a third gear is fixedly connected to the output end of the second motor. The third gear meshes with the shifting gear ring. The shifting gear ring is evenly arranged with several tap clamps in the circumference. Each tap clamp includes a fixed sleeve that is fixedly connected to the shifting gear ring. A spring collet and a threaded cylinder are provided inside the fixed sleeve. The threaded cylinder is threadedly engaged with the fixed sleeve. A fourth gear is integrally formed at the lower end of the threaded cylinder. The side wall of the fixed sleeve is provided with a clamping opening groove for the shank of the tap workpiece to enter. The workbench is equipped with a feeding guide rail at the feeding station corresponding to the shifting gear ring; The lower part of the shifting gear ring is provided with a first arc-shaped rack with the tooth tip facing inward in the arc-shaped conveying section corresponding to the loading station. The first arc-shaped rack meshes with the fourth gear and drives the threaded cylinder to move upward relative to the fixed sleeve, so that the spring collet clamps the tap workpiece. The shifting gear ring is provided with a second arc-shaped rack with the tooth tip facing outward at the downstream station of the grinding station. The second arc-shaped rack meshes with the fourth gear and drives the threaded cylinder to move downward relative to the fixed sleeve, so that the spring collet releases the tap workpiece. A material discharge chute is provided below the end of the second arc-shaped rack.

2. The CNC thread cutting machine tool with integrated tap loading and unloading as described in claim 1, characterized in that: A CNC grinding machine is slidably mounted on the worktable via guide rails. The spindle box is slidably mounted on the CNC grinding machine in the vertical direction, driving the grinding wheel to complete the vertical feed action.

3. The CNC thread cutting machine tool with integrated tap loading and unloading as described in claim 1, characterized in that: The output shaft of the first motor is arranged vertically, the eccentric arm is set perpendicular to the output shaft of the first motor, the axis of the grinding wheel shaft is perpendicular to the length direction of the eccentric arm, and the second gear is coaxially fixed to the lower end face of the spindle box with the output shaft of the first motor.

4. The CNC thread cutting machine tool with integrated tap loading and unloading as described in claim 1, characterized in that: The fixed ring is fixedly connected to the worktable, the shifting gear ring is rotatably connected to the outer wall of the fixed ring through a bearing, the third gear meshes with the outer teeth of the shifting gear ring, and the second motor drives the shifting gear ring to rotate clockwise through the third gear.

5. The CNC thread cutting machine tool with integrated tap loading and unloading as described in claim 1, characterized in that: The upper inner wall of the fixed sleeve is provided with a tapered contraction section, the outer wall of the spring collet is adapted to the tapered surface of the tapered contraction section, a pressure spring is abutting between the spring collet and the threaded cylinder, and the spring collet, the threaded cylinder and the fourth gear are coaxially connected to form an axial channel for the tap workpiece to fall.

6. The CNC thread cutting machine tool with integrated tap loading and unloading as described in claim 4, characterized in that: The clamping opening slot is opened on the upper side wall of the fixed sleeve. The opening of the clamping opening slot faces the tangential direction of the shifting gear ring, and the clamping opening slots of all tap cleavers are opened in the same direction along the clockwise rotation direction of the shifting gear ring.

7. The CNC thread cutting machine tool with integrated tap loading and unloading as described in claim 1, characterized in that: The feeding guide rail is divided into a straight guide rail section and an arc-shaped guide rail section. The straight guide rail section is used for horizontally conveying tap workpieces. The arc-shaped guide rail section is arranged coaxially with the shifting gear ring. The starting end of the arc-shaped guide rail section is smoothly connected to the straight guide rail section, and the end extends to the upstream side of the grinding station.

8. The CNC thread cutting machine tool with integrated tap loading and unloading as described in claim 7, characterized in that: The first arc-shaped rack is fixedly installed on the workbench and located below the shifting gear ring. The arc length of the first arc-shaped rack is consistent with the arc length of the arc-shaped guide rail section. The tooth tip of the first arc-shaped rack faces the center of the shifting gear ring. When the tap clamp moves along the arc-shaped guide rail section with the shifting gear ring, the fourth gear meshes with the first arc-shaped rack, driving the threaded cylinder to rotate upward relative to the fixed sleeve.

9. The CNC thread cutting machine tool with integrated tap loading and unloading as described in claim 1, characterized in that: The second arc-shaped rack is fixedly installed on the worktable and located below the shifting gear ring. The second arc-shaped rack is arranged clockwise downstream of the grinding station. The tooth tip of the second arc-shaped rack faces away from the center of the shifting gear ring. The arc length of the second arc-shaped rack is equal to the arc length of the first arc-shaped rack. When the tap chuck moves along the second arc-shaped rack with the shifting gear ring, the fourth gear meshes with the second arc-shaped rack, driving the threaded sleeve to rotate downward relative to the fixed sleeve.

10. The CNC thread cutting machine tool with integrated tap loading and unloading as described in claim 5, characterized in that: The material discharge slide is inclinedly arranged below the end of the second arc-shaped rack. When the tap clamp moves to the end of the second arc-shaped rack, the spring chuck completely releases the tap workpiece. The tap workpiece falls through the axial channel inside the tap clamp to the material discharge slide and is discharged and collected by the material discharge slide.

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