A tapping device with pitch adjustment function for screw machining

Abstract

The application discloses a tapping equipment with pitch adjusting function for screw rod machining, and belongs to the technical field of screw rod tapping machining. The tapping equipment comprises a machining table and a mechanical hand installed on the machining table. A tapping assembly is installed at the movement end of the mechanical hand. The upper surface of the machining table is fixed with a base. The base is fixedly installed with a fixed plate. Three groups of upper clamping assemblies for limiting screw rod tapping machining positions are arranged on the fixed plate at equal intervals along the length direction. A clamping strip is fixedly installed in the base. A moving plate is longitudinally and slidingly installed on the clamping strip. Three groups of lower clamping assemblies for further limiting screw rod tapping machining positions are arranged on the moving plate at equal intervals. The lower clamping assemblies are distributed in correspondence with the upper clamping assemblies. The upper clamping assembly located at the middle position is fixedly arranged on the fixed plate. A shifting mechanism for adjusting the screw rod machining pitch is arranged on the base. The tapping equipment can stably clamp screw rods with different diameters and lengths, and improves the stability of screw rod tapping machining.

Description

Technical Field

[0001] This invention relates to the field of screw tapping technology, specifically to a screw tapping device with pitch adjustment function. Background Technology

[0002] Screw machining and tapping equipment is a special processing equipment for threaded holes. It is mainly used for internal thread tapping operations on various columnar and rod-shaped parts. The equipment is typically equipped with a machine body, worktable, tapping power spindle, feed drive mechanism, and workpiece clamping and positioning fixture. It can be arranged vertically or horizontally. The motor and transmission structure drive the tap to rotate and feed axially to complete the thread cutting of the screw's preset bottom hole.

[0003] For example, patent CN220970994U discloses a screw tapping machine, including a base, a motor base fixed to the top left side of the base, a rectangular through slot on the top right side of the base, a drain outlet between the motor base and the rectangular through slot, symmetrical support blocks on the left and right sides of the bottom of the rectangular through slot, and a support column at the bottom of the base to support the entire machine; a feed component for driving the screw to move horizontally is provided in the rectangular through slot; a protective cover for preventing tapping chips from splashing is provided between the motor base and the rectangular through slot; and a cleaning component for collecting tapping chips is provided below the drain outlet. By setting up the cleaning component, this tapping machine can improve the cutting effect of the screw thread and also conveniently collect chips, thereby improving work efficiency.

[0004] For example, patent CN219131016U discloses a screw tapping device, belonging to the field of tapping technology. It includes a device housing and a cooling assembly located on the outer wall of the housing. The cooling assembly comprises a storage shell, a sliding sleeve, a fixing frame, a storage cylinder, a sponge block, a driven gear, a drive motor, and a drive gear. The sliding sleeve is slidably fitted onto the outer wall of the storage shell, and the storage cylinder is rotatably embedded in the space formed by the storage shell and the sliding sleeve. The fixing frame is fixedly located on the outer wall of one end of the storage cylinder, the driven gear is fixedly located on the outer wall of the fixing frame, and the drive gear is fixedly located at the output end of the drive motor. The cooling assembly allows for continuous supply and application of coolant to the screw. During tapping, a large amount of heat accumulates at the tapped thread hole. Continuous application of coolant ensures stable heat dissipation, preventing overheating and metal fatigue caused by heat accumulation during tapping.

[0005] For example, patent CN221134358U discloses a screw manufacturing and tapping equipment, including a base plate, a support leg connected to the lower end of the base plate, a drive mechanism mounted on the upper end of the base plate, an adjustment mechanism connected to one end of the drive mechanism, a tapping mechanism connected to one end of the adjustment mechanism, a convex groove provided on the upper end of the base plate, and a clamping mechanism provided in the inner cavity of the convex groove. This tapping equipment facilitates efficient and automated tapping of screws, effectively improving production efficiency. It also facilitates effective and secure engagement and quick disassembly of round dies, and allows for easy replacement of round dies with different thread sizes, effectively improving practicality and ease of use.

[0006] Existing conventional screw tapping equipment typically features multiple machining stations on the processing table. Each station uses clamping fixtures to position and clamp the screw, enabling continuous tapping of multiple workpieces sequentially. However, in actual production, screws of different batches and models vary significantly in overall length and outer diameter. Traditional equipment often employs a fixed arrangement of stations, with constant lateral spacing between adjacent stations and the spacing of the screw clamps. This makes it impossible to adjust according to the actual screw specifications, hindering the clamping and positioning of screws of different sizes. This can easily lead to unstable workpiece clamping, machining interference between stations, and the transmission of machining vibrations, ultimately reducing the positioning accuracy and structural stability during screw tapping, affecting thread quality and the overall versatility of the equipment.

[0007] To address the aforementioned issues, there is an urgent need for innovative design based on existing screw tapping equipment. Summary of the Invention

[0008] The purpose of this invention is to provide a tapping device for screw processing with adjustable spacing, in order to solve the problem that the stations of traditional equipment mentioned in the background art are mostly fixed in arrangement, and the lateral spacing between adjacent stations and the spacing of the screw clamps are fixed values. They cannot be adjusted according to the actual specifications of the screw, making it difficult to adapt to the clamping and positioning requirements of screws of different sizes. This can easily lead to unstable workpiece clamping, processing interference between stations, and mutual transmission of processing vibrations, thereby reducing the positioning accuracy and structural stability of the screw during tapping, affecting the thread processing quality and the overall processing versatility of the equipment.

[0009] To achieve the above objectives, the present invention provides the following technical solution: a tapping device for screw processing with adjustable spacing, comprising a processing table and a robot arm mounted on the processing table. A tapping assembly is mounted on the moving end of the robot arm. A base is fixed on the upper surface of the processing table, and a fixed plate is fixedly mounted in the base. Three sets of upper clamping assemblies for limiting the screw tapping processing position are evenly spaced along the length direction on the fixed plate. A retaining strip is fixed inside the base, and a moving plate is slidably mounted on the retaining strip. Three sets of lower clamping assemblies for further limiting the screw tapping processing position are evenly spaced on the moving plate. The lower clamping assemblies are distributed vertically and vertically corresponding to the upper clamping assemblies. The upper clamping assembly located in the middle is fixedly mounted on the fixed plate. A shifting mechanism for adjusting the screw processing spacing is provided on the base. The shifting mechanism drives the upper clamping assemblies on both sides to move equidistantly, and the lower clamping assemblies move horizontally synchronously with the upper clamping assemblies. At the same time, the shifting mechanism adjusts the longitudinal spacing between the lower clamping assemblies and the upper clamping assemblies to stably clamp screws of different lengths and diameters.

[0010] Preferably, the shifting mechanism includes guide strips fixed to the upper surfaces of the fixed plate and the movable plate; an internal threaded guide seat is slidably mounted on the guide strip on the surface of the fixed plate, and the internal threaded guide seat is fixed to the upper clamping assembly located at both sides; a multi-directional guide seat is slidably mounted on the guide strip on the surface of the movable plate, and the multi-directional guide seat is fixed to the lower clamping assembly located at both sides; an upper moving groove and a lower moving groove are provided on the base, the upper moving groove corresponds to the position of the upper clamping assembly, and the internal threaded guide seat is slidably disposed in the upper moving groove, and the lower moving groove corresponds to the position of the lower clamping assembly; rectangular grooves for tapping clamping screws are provided on both the fixed plate and the movable plate.

[0011] Preferably, the displacement mechanism further includes a vertical rod fixedly installed on an internal threaded guide seat, and the multi-directional guide seat is longitudinally slidably installed on the vertical rod.

[0012] Preferably, a sliding column is vertically fixed on the multi-directional guide seat, and a sliding frame is inclinedly fixed on the base, with the sliding column slidably installed in the sliding frame; a bidirectional lead screw is rotatably connected to the outer surface of the base, and the internal threaded guide seat is threadedly connected to the bidirectional lead screw.

[0013] Preferably, the upper clamping assembly includes an upper V-shaped seat fixed on an internal threaded guide seat, an upper fixing frame fixed on the upper V-shaped seat, an internal threaded clamping rod slidably mounted on the upper fixing frame, and an upper flexible pad fixed on the side of the internal threaded clamping rod near the upper V-shaped seat.

[0014] Preferably, a threaded rod is rotatably connected to the upper fixed frame, and the threaded rod is threadedly connected to the internal threaded clamp rod; a positioning plate is fixedly sleeved on the outside of the internal threaded clamp rod, and a positioning post is vertically fixed on the lower surface of the positioning plate.

[0015] Preferably, the lower clamping assembly includes a lower V-shaped seat fixed on a multi-directional guide seat, a lower fixing frame fixed on the lower V-shaped seat, a lower clamping rod sliding laterally on the lower fixing frame, and a lower flexible pad fixed on the side of the lower clamping rod near the lower V-shaped seat; the lower clamping rod is longitudinally slidably mounted on a positioning post.

[0016] Preferably, the upper clamping assembly is provided with a buffer clamping mechanism to stabilize the tapping process of the clamping screw.

[0017] Preferably, the buffer clamping mechanism includes an inclined groove extending through the upper V-shaped seat, in which a T-shaped rod is slidably installed; a return spring is elastically connected between the T-shaped rod and the upper V-shaped seat, and the T-shaped rod moves at an angle closer to the internal threaded clamping rod.

[0018] Preferably, the upper V-shaped seat has a bottom groove that is connected to the inclined groove. A straight rod is slidably connected in the bottom groove. The straight rod is fixedly connected to the lower surface of the T-shaped rod. An elastic pressure plate is fixed to the lower surface of the straight rod. The elastic pressure plate moves down and presses against the surface of the fixed plate. Two pressure rods are fixedly connected to the tapping assembly through a fixed seat. The pressure rods are inclined at the bottom and move down to contact and press against the T-shaped rod.

[0019] Compared with the prior art, the beneficial effects of the present invention are: the screw processing tapping equipment with spacing adjustment function can adjust the lateral spacing of the upper clamping assembly and the longitudinal spacing between the upper clamping assembly and the lower clamping assembly according to the length and diameter of the screw, so as to keep the screw clamped on the base stable and perform batch tapping processing.

[0020] The base is equipped with a shifting mechanism for adjusting the machining spacing of the screws. The shifting mechanism adopts a bidirectional screw drive structure, which synchronously controls the upper clamping components on both sides to move laterally in opposite directions, accurately adjusting the spacing between the upper clamping components on both sides and the upper clamping component in the middle position. During the lateral spacing adjustment, the lower clamping components on both sides move laterally synchronously with the corresponding upper clamping components, realizing the linkage adjustment of the overall spacing of multiple positions. This adapts to the arrangement and installation requirements of screws with different diameter specifications, reasonably increases or decreases the lateral clearance distance between adjacent positions, and avoids interference and collision between workpieces and tooling.

[0021] The base is equipped with a displacement mechanism for adjusting the machining spacing of the screw. This mechanism can adjust the longitudinal distance between the lower clamping assembly and the upper clamping assembly. When the lower clamping assembly on both sides moves laterally, it drives the sliding column to tilt and move in the sliding frame. This causes the lower clamping assembly to move longitudinally while moving laterally, adjusting the distance between the lower clamping assembly and the upper clamping assembly to accommodate the vertical clamping and fixing of screws of different lengths. This ensures that the upper and lower clamping and positioning of the screw is reliable, effectively reducing the mutual transmission of machining vibration between workstations and improving the adaptability and machining stability of tapping operations for screws of different specifications.

[0022] The upper clamping assembly is equipped with a buffer clamping mechanism to ensure the stability of the screw tapping process. When the tapping assembly taps the screw that has been clamped in place, the buffer clamping mechanism presses down on the T-shaped bar through the pressure bar, driving the T-shaped bar to slide along the inclined groove, so that the end of the T-shaped bar is tightly pressed against the outer wall of the screw, forming an auxiliary clamping and limiting effect on the screw from the side, further improving the firmness and coaxiality of the screw clamping, and effectively suppressing the radial offset, slight shaking and rotation of the screw during the tapping process.

[0023] Simultaneously, as the T-shaped rod moves with tilting, it synchronously drives the elastic pressure plate to move downward and press tightly against the surface of the fixed plate. Utilizing the pre-tightening friction of the elastic pressure plate, the positioning position of the corresponding station between the upper clamping component and the base is reinforced, reducing the transmission of vibration generated by the tapping operation to adjacent stations, reducing vibration coupling interference between stations, ensuring that the positioning reference of each station does not shift when tapping continuously in multiple stations, and improving processing accuracy and finished product quality. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the processing table structure of the present invention.

[0025] Figure 2 This is a schematic diagram of the robotic arm structure of the present invention.

[0026] Figure 3 This is a schematic diagram of the base structure of the present invention.

[0027] Figure 4 This is a schematic diagram of the fixed plate and movable plate structure of the present invention.

[0028] Figure 5 This is a schematic diagram of the upper clamping component and the lower clamping component of the present invention.

[0029] Figure 6 This is a schematic diagram of the internal thread guide seat and multi-directional guide seat of the present invention.

[0030] Figure 7 This is a schematic diagram of the upper V-shaped seat and the lower V-shaped seat structure of the present invention.

[0031] Figure 8 This is a schematic diagram of the sliding column and sliding frame structure of the present invention.

[0032] Figure 9 This is a schematic diagram of the pole structure of the present invention.

[0033] Figure 10 This is a schematic diagram of the tapping assembly structure of the present invention.

[0034] Figure 11 This is a schematic diagram of the internal threaded clamping rod structure of the present invention.

[0035] Figure 12This is a schematic diagram of the T-shaped rod structure of the present invention.

[0036] In the diagram: 1. Machining table; 2. Robotic arm; 3. Tapping assembly; 4. Base; 41. Upper moving slot; 42. Lower moving slot; 5. Fixing plate; 6. Upper clamping assembly; 61. Upper V-shaped seat; 62. Upper fixing frame; 63. Internal threaded clamping rod; 64. Upper flexible pad; 65. Threaded rod; 66. Positioning plate; 67. Positioning pin; 7. Clamping strip; 8. Moving plate; 9. Lower clamping assembly; 91. Lower V-shaped seat; 92. 93. Lower fixed frame; 94. Lower clamping rod; 10. Lower flexible pad; 11. Guide bar; 12. Internal threaded guide seat; 13. Two-way screw; 14. Upright rod; 15. Multi-directional guide seat; 16. Sliding column; 17. Sliding frame; 18. Rectangular groove; 19. T-shaped rod; 10. Inclined groove; 10. Bottom groove; 11. Straight rod; 12. Elastic pressure plate; 13. Return spring; 14. Fixed seat; 25. Pressure rod. Detailed Implementation

[0037] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0038] Example 1: Please refer to Figure 1 - Figure 6 The present invention provides the following technical solution: a tapping device for screw processing with adjustable spacing function, comprising a processing table 1 and a robot arm 2 mounted on the processing table 1, wherein a tapping assembly 3 is mounted at the moving end of the robot arm 2, a base 4 is fixed on the upper surface of the processing table 1, a fixing plate 5 is fixedly mounted in the base 4, and three sets of upper clamping assemblies 6 for limiting the screw tapping processing position are equally spaced along the length direction on the fixing plate 5, a clamping strip 7 is fixed inside the base 4, and a moving plate 8 is longitudinally slidably mounted on the clamping strip 7, wherein the moving plate 8 is equally spaced along the length direction. The spacing is set with three sets of lower clamping components 9 to further define the screw tapping position. The lower clamping components 9 are distributed vertically and vertically with the upper clamping components 6. The upper clamping component 6 located in the middle is fixedly mounted on the fixed plate 5. The base 4 is equipped with a shifting mechanism to adjust the screw processing spacing. The shifting mechanism drives the upper clamping components 6 on both sides to move at equal distances. The lower clamping components 9 follow the upper clamping components 6 and move horizontally synchronously. At the same time, the shifting mechanism adjusts the longitudinal spacing between the lower clamping components 9 and the upper clamping components 6 to stably clamp screws of different lengths and diameters.

[0039] Multiple screws are placed sequentially on multiple workstations of the base 4. The machining position of the tapping assembly 3 is controlled by the robot arm 2, so that the tapping assembly 3 is positioned directly above the clamped screw. The tapping assembly 3 is controlled to move downward to realize the tapping of the screw. Multiple workstations can realize continuous loading and unloading and continuous tapping, thereby improving the screw production efficiency.

[0040] Depending on the different lengths and diameters of the screws from different batches, the spacing between the stations on the base 4 is adjusted. The upper clamping component 6 of the middle station is fixedly mounted on the fixed plate 5, and the lower clamping component 9 of the middle station is fixedly mounted on the moving plate 8. Moving and adjusting the upper clamping components 6 of the stations on both sides of the base 4 causes the corresponding lower clamping components 9 below them to move laterally in sync, thereby adjusting the lateral spacing between the stations. When the upper clamping components 6 of the stations on both sides move laterally, they can drive the corresponding lower clamping components 9 below them to move longitudinally, thereby adjusting the distance between the upper clamping components 6 and the lower clamping components 9. This adapts to different models of screws, so that the screws can be stably clamped and confined on the base 4, avoiding mutual interference between the tapping processes of adjacent stations and maintaining the stability of the tapping process.

[0041] Please see Figure 3 - Figure 8 The shifting mechanism includes guide bars 10 fixed to the upper surfaces of the fixed plate 5 and the movable plate 8. An internal threaded guide seat 11 is slidably mounted on the guide bar 10 on the surface of the fixed plate 5. The internal threaded guide seat 11 is fixed to the upper clamping assembly 6 located at the two side workstations. A multi-directional guide seat 13 is slidably mounted on the guide bar 10 on the surface of the movable plate 8. The multi-directional guide seat 13 is fixed to the lower clamping assembly 9 located at the two side workstations. An upper moving groove 41 and a lower moving groove 42 are provided on the base 4. The upper moving groove 41 corresponds to the position of the upper clamping assembly 6, and the internal threaded guide seat 11 is slidably disposed in the upper moving groove 41. The lower moving groove 42 corresponds to the position of the lower clamping assembly 9. A rectangular groove 16 for tapping clamping screws is provided on both the fixed plate 5 and the movable plate 8. A bidirectional screw 111 is rotatably connected to the outer surface of the base 4. The internal threaded guide seat 11 is threadedly connected to the bidirectional screw 111.

[0042] Please see Figure 8 and Figure 9 The displacement mechanism also includes a vertical rod 12 fixedly mounted on the internal threaded guide seat 11, and a multi-directional guide seat 13 longitudinally slidably mounted on the vertical rod 12. A sliding column 14 is vertically fixed on the multi-directional guide seat 13, and a sliding frame 15 is obliquely fixed on the base 4, with the sliding column 14 slidably mounted in the sliding frame 15.

[0043] A small motor on the running base 4 controls the rotation of the bidirectional lead screw 111. An internal thread guide seat 11 is fixed on the upper clamping assembly 6 located on both sides of the workstation. The internal thread guide seat 11 is threadedly connected to the bidirectional lead screw 111. Under the threaded transmission, it can drive the internal thread guide seat 11 to move laterally on the guide bar 10, thereby adjusting the distance between the upper clamping assemblies 6 on both sides and the middle upper clamping assembly 6. The multi-directional guide seat 13 outside the lower clamping assemblies 9 on both sides is slidably sleeved on the upright 12. Therefore, when the internal thread guide seat 11 moves laterally, the upright 12 and the multi-directional guide seat 13 can drive the lower clamping assembly 9 to move laterally synchronously, so that the lower clamping assemblies 9 on both sides follow the upper clamping assembly 6 to move laterally synchronously, realizing the synchronicity of the lateral adjustment of the upper clamping assembly 6 and the lower clamping assembly 9.

[0044] During the lateral movement of the lower clamping assembly 9, the sliding column 14 is driven to move laterally through the multi-directional guide seat 13. At this time, the sliding column 14 is connected to the sliding frame 15 and moves. Since the sliding frame 15 is inclined, the sliding column 14 slides along the inclined direction, and the sliding column 14 generates longitudinal displacement. It can drive the multi-directional guide seat 13 to move longitudinally outside the upright 12. The multi-directional guide seat 13 drives the lower clamping assembly 9 and the moving plate 8 to move longitudinally. The moving plate 8 is engaged with the outside of the clamping strip 7 and moves longitudinally, realizing the adjustment of the distance between the upper clamping assembly 6 and the lower clamping assembly 9. The adjustment of the lateral distance between each station can keep the screw loading and unloading from interfering with each other, while reducing the resonance effect between adjacent stations and maintaining the stability of multi-station screw processing.

[0045] Please see Figure 5 - Figure 9 The upper clamping assembly 6 includes an upper V-shaped seat 61 fixed on an internal threaded guide seat 11. An upper fixing frame 62 is fixed on the upper V-shaped seat 61. An internal threaded clamping rod 63 is laterally slidably mounted on the upper fixing frame 62. An upper flexible pad 64 is fixed on the side of the internal threaded clamping rod 63 near the upper V-shaped seat 61. A threaded rod 65 is rotatably connected to the upper fixing frame 62. The threaded rod 65 is threadedly connected to the internal threaded clamping rod 63. A positioning plate 66 is fixedly sleeved on the outside of the internal threaded clamping rod 63. A positioning post 67 is vertically fixed on the lower surface of the positioning plate 66.

[0046] Please see Figure 5 - Figure 9 The lower clamping assembly 9 includes a lower V-shaped seat 91 fixed on the multi-directional guide seat 13, a lower fixing frame 92 fixed on the lower V-shaped seat 91, a lower clamping rod 93 sliding laterally on the lower fixing frame 92, and a lower flexible pad 94 fixed on the side of the lower clamping rod 93 near the lower V-shaped seat 91; the lower clamping rod 93 is longitudinally slidably mounted on the positioning post 67.

[0047] The screw is vertically positioned between the upper clamping assembly 6 and the lower clamping assembly 9, passing through the upper V-shaped seat 61 and the lower V-shaped seat 91. A small motor next to the upper fixed frame 62 controls the rotation of the threaded rod 65. The threaded rod 65 is threadedly driven by the internal threaded clamping rod 63, which controls the lateral movement of the internal threaded clamping rod 63 as it passes through the upper fixed frame 62. The internal threaded clamping rod 63 moves laterally closer to the upper V-shaped seat 61, clamping and confining it outside the screw. While the upper clamping assembly 6 is moving and adjusting, the internal threaded clamping rod 63 drives the positioning plate 66 to move laterally in sync. The positioning plate 66 is fixed below the positioning post 67. The lower clamping rod 93 in the lower clamping assembly 9 is longitudinally slidably sleeved on the positioning post 67. Therefore, during the process of the internal thread clamping rod 63 driving the positioning post 67 to move laterally, the positioning post 67 can drive the lower clamping rod 93 to move laterally synchronously, so that the lower clamping rod 93 moves and clamps the outside of the screw. During the longitudinal adjustment of the lower clamping assembly 9, the lower clamping rod 93 is driven to slide longitudinally on the positioning post 67. It can cooperate with the position adjustment of the lower clamping assembly 9 to avoid motion interference.

[0048] The upper flexible pad 64 on the end face of the internal thread clamping rod 63 is clamped to the outside of the screw, and the lower flexible pad 94 on the lower clamping rod 93 is clamped to the outside of the screw. The clamping force is applied stably and does not damage the screw surface, thus further maintaining the stability of the thread tapping process.

[0049] Example 2: Please refer to Figure 10 - Figure 12 Based on Embodiment 1, a buffer clamping mechanism is also disclosed, the specific structure of which is as follows: The upper clamping assembly 6 is provided with a buffer clamping mechanism to stabilize the tapping process of the clamping screw. The buffer clamping mechanism includes a slanted groove 171 that passes through the upper V-shaped seat 61, and a T-shaped rod 17 is slidably installed in the slanted groove 171; a return spring 18 is elastically connected between the T-shaped rod 17 and the upper V-shaped seat 61, and the T-shaped rod 17 tilts and moves closer to the internal thread clamping rod 63. The upper V-shaped seat 61 has a bottom groove 172 that is connected to the inclined groove 171. A straight rod 173 is slidably connected in the bottom groove 172. The straight rod 173 is fixedly connected to the lower surface of the T-shaped rod 17. An elastic pressure plate 174 is fixed on the lower surface of the straight rod 173. The elastic pressure plate 174 moves down and presses against the surface of the fixed plate 5. Two pressure rods 20 are fixedly connected to the tapping assembly 3 through the fixed seat 19. The pressure rods 20 are inclined at the bottom and move down to contact and press against the T-shaped rod 17.

[0050] When the tapping assembly 3 is moved downward by the robot arm 2, the pressure rod 20 outside the tapping assembly 3 moves downward synchronously. When the pressure rod 20 moves downward, its inclined surface contacts the surface of the T-shaped rod 17. The T-shaped rod 17 is subjected to pressure and moves obliquely in the inclined groove 171. The T-shaped rod 17 moves obliquely and approaches the clamped screw. Its end face moves out of the upper V-shaped seat 61 and is pressed against the outside of the screw, further limiting the position of the screw tapping. When the T-shaped rod 17 moves obliquely, it can drive the straight rod 173 to move in the bottom groove 172. The straight rod 173 drives the elastic pressure plate 174 to move downward and press against the surface of the fixed plate 5, limiting the position of the upper clamping assembly 6 on the fixed plate 5, keeping the processing stable and avoiding resonance between adjacent stations.

[0051] In the description of this invention, 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 invention according to the specific circumstances.

[0052] 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 tapping device for screw machining with pitch adjustment function, comprising a machining table (1) and a robot (2) mounted on the machining table (1), wherein a tapping assembly (3) is mounted at the moving end of the robot (2), characterized in that: The upper surface of the processing table (1) is fixed with a base (4), and a fixing plate (5) is fixedly installed in the base (4). Three sets of upper clamping components (6) for limiting the screw tapping processing position are equally spaced along the length direction on the fixing plate (5). A clamping strip (7) is fixed inside the base (4). A moving plate (8) is longitudinally slidably installed on the clamping strip (7). Three sets of lower clamping components (9) for further limiting the screw tapping processing position are equally spaced on the moving plate (8). The lower clamping components (9) and the upper clamping components (6) are distributed vertically and vertically respectively. The upper clamping assembly (6) located in the middle is fixedly mounted on the fixed plate (5). The base (4) is provided with a shifting mechanism for adjusting the machining spacing of the screw. The shifting mechanism drives the upper clamping assemblies (6) on both sides to move at equal distances. The lower clamping assembly (9) moves laterally in sync with the upper clamping assembly (6). At the same time, the shifting mechanism adjusts the longitudinal spacing between the lower clamping assembly (9) and the upper clamping assembly (6) to stably clamp screws of different lengths and diameters.

2. The tapping device for screw processing with pitch adjustment function according to claim 1, characterized in that: The shifting mechanism includes a guide strip (10) fixed on the upper surface of the fixed plate (5) and the moving plate (8). An internal thread guide seat (11) is slidably installed on the guide strip (10) on the surface of the fixed plate (5). The internal thread guide seat (11) is fixed on the upper clamping assembly (6) located on both sides of the work station. A multi-directional guide seat (13) is slidably installed on the guide strip (10) on the surface of the movable plate (8), and the multi-directional guide seat (13) is fixed on the lower clamping assembly (9) located on both sides of the work station; The base (4) is provided with an upper moving groove (41) and a lower moving groove (42). The upper moving groove (41) corresponds to the position of the upper clamping component (6), and the internal thread guide seat (11) is slidably disposed in the upper moving groove (41). The lower moving groove (42) corresponds to the position of the lower clamping component (9). Both the fixed plate (5) and the movable plate (8) are provided with rectangular grooves (16) for tapping the clamping screw.

3. The tapping device for screw processing with pitch adjustment function according to claim 2, characterized in that: The displacement mechanism also includes a vertical rod (12) fixedly installed on the internal thread guide seat (11), and a multi-directional guide seat (13) is longitudinally slidably installed on the vertical rod (12).

4. The tapping device for screw processing with pitch adjustment function according to claim 3, characterized in that: A sliding column (14) is vertically fixed on the multi-directional guide seat (13), and a sliding frame (15) is inclinedly fixed on the base (4). The sliding column (14) is slidably installed in the sliding frame (15). The outer surface of the base (4) is rotatably connected to a two-way lead screw (111), and the internal thread guide seat (11) is threadedly connected to the two-way lead screw (111).

5. A tapping device for screw machining with pitch adjustment function according to claim 2, characterized in that: The upper clamping assembly (6) includes an upper V-shaped seat (61) fixed on an internal thread guide seat (11), an upper fixing frame (62) fixed on the upper V-shaped seat (61), an internal thread clamping rod (63) slidably mounted on the upper fixing frame (62), and an upper flexible pad (64) fixed on the side of the internal thread clamping rod (63) near the upper V-shaped seat (61).

6. A tapping device for screw machining with pitch adjustment function according to claim 5, characterized in that: A threaded rod (65) is rotatably connected to the upper fixed frame (62), and the threaded rod (65) is threadedly connected to the internal threaded clamp rod (63); The internal threaded clamp rod (63) is externally fixed with a positioning plate (66), and a positioning post (67) is vertically fixed on the lower surface of the positioning plate (66).

7. A tapping device for screw machining with pitch adjustment function according to claim 6, characterized in that: The lower clamping assembly (9) includes a lower V-shaped seat (91) fixed on a multi-directional guide seat (13), a lower fixing frame (92) fixed on the lower V-shaped seat (91), a lower clamping rod (93) sliding laterally on the lower fixing frame (92), and a lower flexible pad (94) fixed on the side of the lower clamping rod (93) near the lower V-shaped seat (91). The lower clamping rod (93) is longitudinally slidably mounted on the positioning post (67).

8. A tapping device for screw machining with pitch adjustment function according to claim 5, characterized in that: The upper clamping assembly (6) is provided with a buffer clamping mechanism to stabilize the tapping process of the clamping screw.

9. A tapping device for screw machining with pitch adjustment function according to claim 8, characterized in that: The buffer clamping mechanism includes a sloping groove (171) that passes through the upper V-shaped seat (61), and a T-shaped rod (17) is slidably installed in the sloping groove (171). A return spring (18) is elastically connected between the T-shaped rod (17) and the upper V-shaped seat (61), and the T-shaped rod (17) tilts and moves closer to the internal threaded clamp rod (63).

10. A tapping device for screw machining with pitch adjustment function according to claim 9, characterized in that: The upper V-shaped seat (61) has a bottom groove (172) that is connected to the inclined groove (171). A straight rod (173) is slidably connected in the bottom groove (172). The straight rod (173) is fixedly connected to the lower surface of the T-shaped rod (17). An elastic pressure plate (174) is fixed on the lower surface of the straight rod (173). The elastic pressure plate (174) moves down and presses against the surface of the fixing plate (5). Two pressure rods (20) are fixedly connected to the tapping assembly (3) via a fixing seat (19). The pressure rods (20) are inclined at the bottom and move down to contact and press against the T-shaped rod (17).

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