Steel pipe internal thread machining machine

Abstract

The invention relates to the technical field of tapping, and discloses a steel pipe internal thread machining machine which comprises a machining platform, a tapping module is installed on the surface of the machining platform, two self-adaptive holding and clamping modules and a feeding module are symmetrically arranged on the surface of the machining platform, and a blanking guide groove is formed below the two self-adaptive holding and clamping modules; the self-adaptive holding and clamping module constructs a power output unit through a hydraulic cylinder, the hydraulic cylinder is installed on the top of the machining platform, a holding and clamping structure is installed on the surface of a telescopic shaft of the hydraulic cylinder, and a hydraulic servo closed-loop control link is constructed by integrating the self-adaptive holding and clamping module and the feeding module and taking the hydraulic cylinder as a core power source. According to the system, the operation logic of steel pipe internal thread tapping is remodeled, a clamping structure and an embedded tooth discharging plate are cooperatively designed, the specification limitation of traditional customized equipment is broken through while the efficient machining rhythm of the tapping machine is kept, the whole process of feeding, clamping, tapping and discharging is connected in series through a single power source, and deep fusion of automatic continuous operation is achieved.

Description

Technical Field

[0001] The invention relates to the technical field of tapping, in particular to a steel pipe internal thread processing machine. Background Art

[0002] An internal thread processing machine is a mechanical device specially used for processing internal threads on the inner wall of steel pipes. It is widely used in pipeline connection, machinery manufacturing, construction, petrochemical and other fields. Its working principle is to use a rotating tap or tapping tool to cut a precise internal thread structure on the inner wall of the steel pipe according to the preset thread specifications. Modern equipment usually adopts electric or hydraulic drive, with automatic feed, speed adjustment and depth control functions to ensure the consistency and accuracy of thread processing. It can process a variety of materials such as carbon steel, stainless steel, alloy steel, etc.

[0003] However, in actual production scenarios, existing equipment still has significant shortcomings. From the perspective of processing mode, internal thread processing is mainly divided into two process paths: thread turning and tapping. Although thread turning equipment has multi-specification adaptability due to its cutting control system, it can cope with different pipe diameters and pitches through program switching parameters, but turning processing has essential limitations - it relies on the rotation of the steel pipe and the compound feed of the tool. During processing, the steel pipe needs to rotate at a high frequency and withstand cutting torque. For long pipes and thin-walled pipes, radial vibration is easily caused, resulting in a decrease in thread profile accuracy; and thread turning can only process For a single pipe, clamping and alignment takes a long time, and it is difficult to achieve a breakthrough in efficiency in mass production. In contrast, tapping machines, although they have shortcomings in adapting to multiple specifications due to their specialized mechanical structure, have irreplaceable efficiency advantages in standardized pipe processing: through the process logic of fixing steel pipes and rotating taps, they avoid the problem of long pipe rotation vibration and are suitable for long-length, thin-walled pipe processing; customized clamping and feeding mechanisms can realize sequential processing of multiple pipes, and the single processing cycle is significantly shorter than that of threading; and the tap cutting load is more uniform, the tool life is longer than that of turning tools, and the overall cost is lower.

[0004] However, the customized nature of the tapping machine has also become a core issue that limits its application expansion. In order to pursue single-specification processing efficiency, the tapping machine needs to be specifically designed with clamping, positioning, and transmission structures. These customized components are highly compatible with specific pipe diameters and lengths. When the steel pipe specifications are changed, the mechanical structure needs to be adjusted on a large scale, including the re-installation of the clamping module and repeated calibration of the feed parameters. This leads to a sharp increase in the time and cost of equipment changeover, making it difficult to quickly respond to multi-specification production needs, greatly compressing its applicable scenarios. Especially in multi-variety small-batch production orders, the efficiency advantage of the tapping machine is offset by the problem of changeover, and even the overall production capacity is reduced due to frequent debugging.

[0005] To improve efficiency, existing technologies attempt to introduce automated loading and unloading structures, hoping to achieve automatic feeding and unloading of steel pipes through robotic arms, conveyor lines, etc. However, such loading and unloading systems and internal thread processing equipment are mostly "split" configurations, and the two lack deep integration in process connection: after the loading and unloading system completes material handling according to the preset program, it needs to wait for the internal thread processing equipment to complete the current batch processing before connecting to the next batch, forming a "batch operation" mode.

[0006] Under this model, there are obvious time intervals and process faults between loading and unloading and processing, making it impossible to achieve continuous and serial production. When faced with the processing of steel pipes of multiple specifications, not only does the loading and unloading system need to frequently adjust the gripping and conveying parameters, but the customization shortcomings of the internal thread processing equipment will also be further magnified - the processing rhythm and clamping requirements of steel pipes of different specifications vary, which makes the coordination difficulty between split equipment increase exponentially, resulting in increased efficiency loss in the overall production process. It is impossible to give full play to the continuous operation advantages of automated loading and unloading, and due to the customization limitations of the tapping machine, it is difficult to flexibly adapt to multi-specification processing. Ultimately, a production dilemma is formed in which the "efficiency improvement demand" and the "multi-specification adaptation problem" constrain each other, seriously affecting the delivery capacity and cost control level of the internal thread processing link in diversified orders.

[0007] To this end, the present invention provides a steel pipe internal thread processing machine. Summary of the Invention

[0008] The object of the present invention is to provide a steel pipe internal thread processing machine to solve the problems raised in the above background technology.

[0009] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a steel pipe internal thread processing machine for tapping a pipe body, comprising a processing platform, a tapping module is installed on the surface of the processing platform, and two adaptive clamping modules and a feeding module are symmetrically arranged on the surface of the processing platform, and a blanking guide groove is provided below the two adaptive clamping modules. The adaptive clamping module is constructed with a hydraulic cylinder to form a power output unit, and the hydraulic cylinder is installed on the top of the processing platform, and a clamping structure is installed on the surface of its telescopic shaft, and a cog blanking plate is installed below the clamping structure. When the hydraulic cylinder drives the clamping structure When the geared blanking plate is configured, the geared blanking plate realizes dual-mode switching between the tube loading bearing position and the blanking release position. The loading module includes a loading shell that supports the tube body, and a blocking plate is built into the loading shell. A telescopic rod is rotatably connected between the blocking plate and the telescopic shaft of the hydraulic cylinder, and a hydraulic servo closed-loop control link of loading-blocking-unloading is constructed. When the hydraulic cylinder drives the clamping structure to perform the tube clamping action, the telescopic rod is used to pull the blocking plate synchronously to complete the rotational reversing action, thereby realizing the loading of a single tube body and the buffering and blocking of subsequent tube bodies, thereby achieving automated and continuous operation of the tapping process.

[0010] Preferably, the adaptive clamping module further includes a mounting seat, the mounting seat is fixedly connected to the top of the processing platform, and the hydraulic cylinder is fixedly connected to the middle of the mounting seat.

[0011] Preferably, the clamping structure also includes a movable plate, which is fixedly connected to the telescopic shaft surface of the hydraulic cylinder. The interior of the movable plate is symmetrically rotated and connected to a plurality of rotating arms, and the sides where every two rotating arms are close to each other are fixedly connected to a spring.

[0012] Preferably, the side of the rotating arm away from the hydraulic cylinder is rotatably connected to a resistance seat, and the surface of the resistance seat is fixedly connected to a clamping soft plate.

[0013] Preferably, the hinged joints between the abutment seat and the rotating arm and the hinged joints between the rotating arm and the movable plate are both connected by elastic elements, and the elastic elements are torsion springs.

[0014] Preferably, every two of the rotating arms arranged in an upper and lower position are set as a group, and the cogwheel blanking plates are arranged in the horizontal gap of each group of rotating arms. The movement trajectory of the rotating arm is radial swing, and the movement trajectory of the cogwheel blanking plate is adaptive displacement in the vertical direction. The two are separated by a spatial axis system to ensure that the radial clamping and vertical compensation movements do not interfere with each other.

[0015] Preferably, a key column is fixedly connected to the inner surface of one side of the cogwheel blanking plate close to the hydraulic cylinder, and a key slot matching the number of key columns is opened through the interior of the movable plate. The key column and the key slot constitute a sliding pair in the vertical direction. When the diameter of the tube body is larger than the initial load-bearing diameter of the cogwheel blanking plate, the gravity of the tube body is transmitted to the cogwheel blanking plate, driving it to adaptively displace vertically downward along the key slot, so that the center of the tube body coincides with the central axis of the clamping structure, thereby realizing coaxiality compensation for different tube diameters.

[0016] Preferably, a second spring is fixedly connected between the cogwheel blanking plate and the movable plate. When the tube body is processed and separated from the cogwheel blanking plate, the elastic restoring force of the second spring drives the blanking plate to reset vertically upward along the keyway, restoring the initial load-bearing diameter, and the preload force of the second spring matches the maximum adaptive weight of the tube body, ensuring that the small-diameter tube body does not sink when loaded and the large-diameter tube body can be adaptively compressed.

[0017] Preferably, every two of the cog blanking plates arranged left and right are set as a group, and a cog groove is provided on the side close to each other in each group of cog blanking plates, and a cog protrusion is fixedly connected to the side close to each other in each group of cog blanking plates, and the cog protrusions and cog grooves are arranged in a staggered manner. When the pipe diameter is smaller than the initial load-bearing diameter, the pipe body is embedded in the staggered gap between the cog protrusions and the cog grooves; when the pipe diameter is larger than the initial load-bearing diameter, the pipe body drives the cog blanking plates on both sides to move in opposite directions, and the cog protrusions and the cog grooves slide and engage along the tooth surface, forming an annular support surface with a diameter smaller than the outer diameter of the pipe body, thereby realizing dual-mode adaptation of small-diameter interlocking and large-diameter clamping.

[0018] Preferably, the loading module further comprises a blocking groove, the blocking groove is opened in the middle of the loading shell, and the blocking plate is rotatably connected to the inside of the blocking groove.

[0019] Preferably, the tapping module integrates a tapping spindle, a tap quick-change mechanism and a cutting fluid spray unit. The tapping spindle is driven by a servo motor to achieve precise control of the speed and feed rate, and the tap quick-change mechanism supports rapid replacement of taps of different specifications; a cutting fluid spray assembly is provided on the surface of the tapping module, which uses a high-pressure pump to spray the cutting fluid in a conical mist to the tapping area, which not only cools and lubricates the taps, but also helps the chips to separate from the inner wall of the tube body; the tube body produced by the tapping operation is released by the cog blanking plate and rolls down along the inclined surface of the blanking guide groove, and the tube body can automatically slide out of the working area of the equipment by gravity; the cutting fluid and metal debris are retained at the bottom of the blanking guide groove due to gravity sedimentation and fluid adhesion, and need to be regularly cleaned through the chip discharge port and drain valve on the side wall of the groove body to ensure that the blanking channel is unobstructed for a long time, maintain a clean production environment for tapping processing, and realize the automatic circulation of the tube body and the zoned collection of cutting waste fluid and debris.

[0020] Compared with the prior art, the present invention has the following beneficial effects: 1. By integrating the adaptive clamping module and the loading module and building a hydraulic servo closed-loop control link with the hydraulic cylinder as the core power source, this invention reshapes the operational logic of tapping internal threads of steel pipes. The system collaboratively designs the clamping structure and the cog-shaped blanking plate, allowing the tapping machine to break through the specification limitations of traditional customized equipment while maintaining an efficient processing rhythm. By connecting the entire process of loading, clamping, tapping, and unloading in series through a single power source, it achieves a deep integration of automated continuous operations.

[0021] 2. Relying on the dual-mode adaptation mechanism of the cog-toothed blanking plate and the keyway sliding pair compensation structure, the present invention solves the core problem of processing steel pipes of multiple specifications. The staggered arrangement of the cog-toothed protrusions and grooves enables small-diameter pipes to be embedded in the gap and large-diameter pipes to drive the plate to be reversely clamped. Combined with the adaptive sinking function of the key column and spring 2, the center height difference of different pipe diameters is automatically compensated to ensure that the center of the pipe body is coaxial with the clamping structure. This adaptation design that does not require large-scale adjustment of the mechanical structure allows the tapping machine to achieve rapid changeover within a certain pipe diameter range, broadening the application scenario boundaries of traditional tapping machines.

[0022] 3. The hydraulic linkage design of the loading module and the clamping action builds a serial operation chain of "loading-blocking-unloading". The telescopic shaft of the hydraulic cylinder pulls the blocking plate to rotate and reverse through the telescopic rod, and completes the release of a single pipe and subsequent buffer blocking while the clamping structure advances, eliminating the process faults of traditional split loading and unloading. When processing steel pipes of different specifications, this closed-loop chain can adaptively adjust the loading rhythm and clamping force, thereby improving the collaborative efficiency of loading and unloading and tapping processes, and changing the production capacity loss problem caused by "batch operation".

[0023] 4. The elastic hinge design of the clamping structure and the cutting fluid collaborative system ensure the precision and stability of the tapping process. The rotating arm group and the clamping soft plate form a flexible package through the torsion spring and spring 1, which adapts to the surface contours of different pipe diameters and avoids deformation caused by rigid clamping. The cogwheel blanking plate relies on the preload force of spring 2 to maintain axial support. Combined with the cooling and chip removal function of the cutting fluid spray, the thread profile accuracy is improved to a certain extent, the surface roughness stability is also controlled, and the precision bottleneck of traditional tapping machines in thin-walled pipe processing is broken through.

[0024] 5. The entire system uses a single power source to drive multiple mechanisms to form a fully closed-loop automated operation system. From the rolling of the tube to the load-bearing positioning of the cogwheel blanking plate, to the adaptive fitting of the clamping soft plate, the precise cutting of the tap, and the automatic blanking after processing, each link is synchronously controlled by hydraulic servo, providing a flexible and efficient solution for small-batch orders of multiple varieties. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a front perspective schematic diagram of the main structure of the present invention; Figure 2 For the present invention Figure 1 A in the middle is an enlarged schematic diagram of the structure; Figure 3 This is a three-dimensional schematic diagram of the clamping structure of the present invention clamping the tube body; Figure 4 It is a three-dimensional schematic diagram of two cog-shaped blanking plates of the present invention being engaged with each other; Figure 5 This is a three-dimensional schematic diagram of the loading module of the present invention loading the tube body; Figure 6 For the present invention Figure 5 The enlarged three-dimensional schematic diagram of the structure at B in the middle; Figure 7 This is a three-dimensional schematic diagram of the loading module of the present invention blocking the tube body; Figure 8 This is a schematic diagram of the clamping structure of the present invention when the tube body is not clamped.

[0026] In the picture: 1. Machining platform; 2. Tapping module; 3. Adaptive clamping module; 31. Mounting seat; 32. Hydraulic cylinder; 33. Clamping structure; 331. Moving plate; 332. Rotating arm; 333. Spring 1; 334. Interference seat; 335. Clamping soft plate; 336. Keyway; 337. Key column; 338. Spring 2; 339. Cog blanking plate; 3391. Cog groove; 3392. Cog protrusion; 4. Loading module; 41. Loading shell; 42. Blocking groove; 43. Blocking plate; 44. Telescopic rod; 5. Tube body. DETAILED DESCRIPTION

[0027] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0028] It should be noted that the tapping module 2 only provides the function of processing the internal thread of the tube body 5, and the hydraulic cylinder 32 only provides the function of driving the movement of the clamping structure 33. The working principle and specific structure of the above structure are both existing technologies. Therefore, in view of the versatility of the above structure, its specific principle will not be repeated later.

[0029] See also Figures 1 to 8 , the present invention provides an embodiment: A steel pipe internal thread processing machine is used for tapping a pipe body 5, comprising a processing platform 1, a tapping module 2 is installed on the surface of the processing platform 1, and two adaptive clamping modules 3 and a loading module 4 are symmetrically arranged on the surface. A blanking guide groove is provided below the two adaptive clamping modules 3. The adaptive clamping module 3 is constructed with a hydraulic cylinder 32 to form a power output unit. The hydraulic cylinder 32 is installed on the top of the processing platform 1, and a clamping structure 33 is installed on the surface of its telescopic shaft. A cog blanking plate 339 is installed below the clamping structure 33. When the hydraulic cylinder 32 drives the clamping structure 33 and the cog blanking plate 339, the cog blanking Plate 339 realizes dual-mode switching between the loading bearing position and the unloading release position of the pipe body 5. The loading module 4 includes a loading shell 41 that supports the pipe body 5. The loading shell 41 has a built-in blocking plate 43. The blocking plate 43 is rotatably connected to the telescopic shaft of the hydraulic cylinder 32 with a telescopic rod 44, and a hydraulic servo closed-loop control link of loading-blocking-unloading is constructed. When the hydraulic cylinder 32 drives the clamping structure 33 to execute the clamping action of the pipe body 5, the telescopic rod 44 is used to pull the blocking plate 43 synchronously to complete the rotation reversing action, thereby realizing the loading of a single pipe body 5 and the buffering and blocking of subsequent pipe bodies 5, and achieving automated and continuous operation of the tapping process.

[0030] It should be noted that the adaptive clamping module 3 also includes a mounting seat 31, which is fixedly connected to the top of the processing platform 1, and the hydraulic cylinder 32 is fixedly connected to the middle of the mounting seat 31, and the clamping structure 33 also includes a moving plate 331, which is fixedly connected to the telescopic shaft surface of the hydraulic cylinder 32, and the internal symmetrical rotation of the moving plate 331 is connected to a plurality of rotating arms 332, and the side of each two rotating arms 332 close to each other is fixedly connected to a spring 333, and the side of the rotating arm 332 away from the hydraulic cylinder 32 is rotatably connected to a contact seat 334, and the surface of the contact seat 334 is fixedly connected to a clamping soft plate 335, and the contact seat 334 The hinges of the rotating arms 332 and the rotating arms 332 and the movable plate 331 are connected by elastic elements, which are torsion springs. Every two rotating arms 332 arranged in an upper and lower position are set as a group, and the cogwheel blanking plates 339 are arranged in the horizontal gap of each group of rotating arms 332. The motion trajectory of the rotating arms 332 is radial swing, and the motion trajectory of the cogwheel blanking plates 339 is adaptive displacement in the vertical direction. The two are separated by a spatial axis system to ensure that the radial clamping and vertical compensation motions do not interfere with each other. The inner surface of the cogwheel blanking plate 339 on the side close to the hydraulic cylinder 32 is fixedly connected to a key column 337, and the interior of the movable plate 331 is penetrated by a hole for connecting to the key column 337. 37, the key slots 336 are adapted to the number of key slots 336, and the key column 337 and the key slots 336 form a sliding pair in the vertical direction. When the diameter of the tube body 5 is larger than the initial load-bearing diameter of the cogwheel blanking plate 339, the gravity of the tube body 5 is transmitted to the cogwheel blanking plate 339, driving it to adaptively displace vertically downward along the key slot 336, so that the center of the tube body 5 coincides with the central axis of the clamping structure 33, thereby achieving coaxiality compensation for different tube diameters. A spring 2 338 is fixedly connected between the cogwheel blanking plate 339 and the movable plate 331. When the tube body 5 is processed and separated from the cogwheel blanking plate 339, the elastic restoring force of the spring 2 338 drives the blanking plate to reset vertically upward along the key slot 336, and recovers The initial load-bearing diameter is restored, and the preload force of the second spring 338 matches the maximum adaptive weight of the tube body 5, ensuring that the small-diameter tube body 5 does not sink when loaded and the large-diameter tube body 5 can be adaptively compressed. Each two cog blanking plates 339 arranged left and right are set as a group. A cog groove 3391 is opened on the side close to each other in each group of cog blanking plates 339. A cog protrusion 3392 is fixedly connected to the side close to each other in each group of cog blanking plates 339. The cog protrusion 3392 and the cog groove 3391 are arranged in a staggered manner. When the tube diameter is smaller than the initial load-bearing diameter, the tube body 5 is embedded in the staggered gap between the cog protrusion 3392 and the cog groove 3391.When the pipe diameter is larger than the initial load-bearing diameter, the pipe body 5 drives the cog blanking plates 339 on both sides to move in the opposite direction, and the cog protrusion 3392 and the cog groove 3391 slide and engage along the tooth surface, forming an annular support surface with a diameter smaller than the outer diameter of the pipe body 5, realizing dual-mode adaptation of small-diameter interlocking and large-diameter clamping. The loading module 4 also includes a blocking groove 42, which is opened in the middle of the loading shell 41, and the blocking plate 43 is rotatably connected to the inside of the blocking groove 42. The tapping module 2 integrates a tapping spindle, a tap quick-change mechanism and a cutting fluid spray unit. The tapping spindle is driven by a servo motor to achieve precise control of the speed and feed rate, and the tap quick-change mechanism supports rapid replacement of taps of different specifications. The tapping module 2 is equipped with a cutting fluid spray assembly, which uses a high-pressure pump to spray cutting fluid in a conical mist onto the tapping area, cooling and lubricating the taps while also helping chips escape from the inner wall of the tube 5. The tube 5 produced during the tapping operation is released by the cog blanking plate 339 and rolls down the inclined surface of the blanking guide groove. The tube 5 automatically slides out of the equipment's working area due to gravity. However, due to gravity settling and fluid adhesion, the cutting fluid and metal debris remain at the bottom of the blanking guide groove and need to be regularly cleaned through the chip discharge port and drain valve on the side wall of the groove to ensure long-term unobstructed blanking channels, maintain a clean production environment for tapping processing, and achieve automated circulation of the tube 5 and zonal collection of cutting waste fluid and debris.

[0031] Specifically, before tapping, the system receives the processing instructions, the hydraulic cylinder 32 moves first, and its telescopic axis is synchronously advanced toward the center direction of the processing platform 1. This power transmission drives the moving plate 331 of the clamping structure 33 and the cog blanking plate 339 to synchronously approach the area to be processed of the tube body 5.

[0032] At the same time, the linear displacement of the telescopic shaft of the hydraulic cylinder 32 is converted into torque through the rotating sub-telescopic rod 44, pulling the blocking plate 43 of the loading module 4 to rotate and reverse around the hinge point of the blocking groove 42 - the blocking plate 43 originally blocked the discharge end of the loading shell 41, and now it is flipped over to release the single tube body 5. The tube body 5 relies on gravity to roll down along the inclined surface of the loading shell 41, and is precisely guided to the supporting position of the cogwheel blanking plate 339 group above the blanking guide groove.

[0033] During the process of the hydraulic cylinder 32 driving the clamping structure 33 to feed, the movable plate 331 acts as a power transmission hub and synchronously pushes the rotating arm 332 group. Since the hinges between the rotating arm 332, the movable plate 331 and the abutment seat 334 are all equipped with torsion spring elastic elements, and the torsion spring is in a pre-tightened constraint state in the initial state, the rotating arm 332 does not yet undergo radial swing, but maintains overall translation with the movable plate 331.

[0034] At this time, the cog blanking plates 339 arranged symmetrically on the left and right form a bearing base for the adapted tube body 5 through the staggered engagement of the cog protrusions 3392 and the cog grooves 3391. The rolled tube body 5 is embedded in the bearing structure, and the small-diameter tube body 5 is engaged in the gap between the cog protrusions 3392 and the cog grooves 3391. The large-diameter tube body 5 drives the cog blanking plates 339 on both sides to move slightly in the opposite direction, and uses the sliding of the tooth surface to form an annular support surface.

[0035] It should be noted that if the tube body 5 is larger in size, its gravity acts preferentially on the cog-shaped blanking plate 339, driving the blanking plate to sink vertically along the key slot 336 of the movable plate 331, and the key column 337 synchronously compresses the spring 2 338. In this process, the adaptive displacement of the cog-shaped blanking plate 339 compensates for the center height difference of the large tube diameter, so that the center of the tube body 5 quickly coincides with the center axis of the clamping structure 33.

[0036] As the movable plate 331 continues to advance, the clamping soft plate 335 gradually approaches the surface of the tube body 5 along with the rotating arm 332. The tube bodies 5 of different diameters force the resistance seat 334 to rotate around the hinge point of the rotating arm 332. The spring 333 between the rotating arms 332 is synchronously compressed, and finally the clamping soft plate 335 fits tightly against the outer circle of the tube body 5. In this process, the elastic constraint of the torsion spring is gradually released, and the radial swing angle of the rotating arm 332 group is adaptively adjusted according to the diameter of the tube body 5, ensuring the flexible wrapping of the clamping soft plate 335 on the tube body 5.

[0037] After the clamping structure 33 completes centering and clamping the tube body 5, the tapping module 2 is started. Specifically, the tapping spindle is driven by a servo motor and advances at a preset speed and feed rate. The tap quick-change mechanism changes the taps as needed. The cutting fluid spray assembly is simultaneously turned on and outputs a conical mist of cutting fluid through a high-pressure pump, which not only cools and lubricates the taps, but also flushes the inner wall of the tube body 5 to assist in chip removal.

[0038] During the processing, the cog blanking plate 339 always relies on the preload force of the spring 2 338 to lift the tube body 5 to ensure the axial stability of the tapping. The elastic hinge structure of the rotating arm 332 group buffers the tapping vibration to prevent the tube body 5 from being deformed due to rigid clamping.

[0039] After the internal thread processing is completed, the telescopic shaft of the hydraulic cylinder 32 is reset in the reverse direction, the moving plate 331 pulls the rotating arm 332 group to retreat synchronously, and the torsion spring and spring 1 333 release elastic potential energy to drive the clamping soft plate 335 to separate from the tube body 5.

[0040] At the same time, the cog blanking plate 339 moves up along the keyway 336 under the restoring force of the spring 2 338, the cog protrusion 3392 separates from the cog groove 3391, and the processed tube body 5 loses its bearing support and rolls out of the equipment along the inclined surface of the blanking guide groove.

[0041] The blocking plate 43 is rotated back to the initial position under the reverse push of the telescopic rod 44, and the feeding housing 41 is re-sealed to complete a single tapping cycle.

[0042] During this process, cutting fluid and metal debris are retained at the bottom of the blanking guide groove due to gravity sedimentation and need to be regularly cleaned through the side wall chip discharge port and drain valve to maintain the cleanliness of the equipment and continuous operation capability. The entire workflow is centered on the single power source of the hydraulic cylinder 32. Through the coordination of multiple mechanisms such as rigid connection, elastic articulation, and sliding pair compensation, full closed-loop control of automatic loading, adaptive clamping and centering, tapping and blanking cleaning of the pipe body 5 is achieved. The adaptive characteristics of the cog structure and spring elements are utilized to be compatible with pipe bodies 5 of multiple specifications. The hydraulic servo link is relied upon to ensure synchronization of the movements, ultimately achieving efficient and precise internal thread processing automation operations.

[0043] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article, or device comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or elements inherent to such process, method, article, or device. In the absence of further limitations, an element defined by the phrase "comprising a ..." does not exclude the presence of additional identical elements in the process, method, article, or device comprising the element.

[0044] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A steel pipe internal thread processing machine for tapping a pipe body (5), comprising a processing platform (1), a tapping module (2) being mounted on the surface of the processing platform (1), and two adaptive clamping modules (3) and a feeding module (4) being symmetrically arranged on the surface of the processing platform (1), a blanking guide groove being provided below the two adaptive clamping modules (3), and characterized in that: The adaptive clamping module (3) is constructed with a hydraulic cylinder (32) as a power output unit. The hydraulic cylinder (32) is installed on the top of the processing platform (1). The surface of the telescopic shaft of the hydraulic cylinder (32) is installed with a clamping structure (33). A cogwheel blanking plate (339) is installed below the clamping structure (33). When the hydraulic cylinder (32) drives the clamping structure (33) and the cogwheel blanking plate (339), the cogwheel blanking plate (339) realizes the dual-mode switching between the loading bearing position and the unloading release position of the tube body (5). The loading module (4) includes a loading shell that supports the tube body (5). The feeding shell (41) has a built-in blocking plate (43), and a telescopic rod (44) is rotatably connected between the blocking plate (43) and the telescopic shaft of the hydraulic cylinder (32), and a hydraulic servo closed-loop control link of feeding-blocking-unloading is constructed. When the hydraulic cylinder (32) drives the clamping structure (33) to perform the clamping action of the pipe body (5), the telescopic rod (44) is used to pull the blocking plate (43) to complete the rotation reversing action, thereby realizing the feeding of a single pipe body (5) and the buffering and blocking of subsequent pipe bodies (5), thereby achieving the automated continuous operation of the tapping process.

2. The steel pipe internal thread processing machine according to claim 1, characterized in that: The adaptive clamping module (3) further comprises a mounting seat (31), wherein the mounting seat (31) is fixedly connected to the top of the processing platform (1), and the hydraulic cylinder (32) is fixedly connected to the middle of the mounting seat (31).

3. The steel pipe internal thread processing machine according to claim 2, characterized in that: The clamping structure (33) further comprises a movable plate (331), wherein the movable plate (331) is fixedly connected to the telescopic shaft surface of the hydraulic cylinder (32), and the interior of the movable plate (331) is symmetrically connected to a plurality of rotating arms (332), and a spring (333) is fixedly connected to the adjacent side of each two rotating arms (332).

4. The steel pipe internal thread processing machine according to claim 3, characterized in that: The side of the rotating arm (332) away from the hydraulic cylinder (32) is rotatably connected to a resistance seat (334), and the surface of the resistance seat (334) is fixedly connected to a clamping soft plate (335).

5. The steel pipe internal thread processing machine according to claim 4, characterized in that: The hinged joint between the abutment seat (334) and the rotating arm (332), and the hinged joint between the rotating arm (332) and the movable plate (331) are both connected by elastic elements.

6. The steel pipe internal thread processing machine according to claim 3, characterized in that: Every two rotating arms (332) arranged in an upper and lower position are set as a group, and the cogwheel blanking plate (339) is arranged in the horizontal gap of each group of rotating arms (332). The movement trajectory of the rotating arms (332) is radial swing, and the movement trajectory of the cogwheel blanking plate (339) is adaptive displacement in the vertical direction. The two are separated by a spatial axis system to ensure that the radial clamping and vertical compensation movements do not interfere with each other.

7. The steel pipe internal thread processing machine according to claim 6, characterized in that: A key column (337) is fixedly connected to the inner surface of one side of the cogwheel blanking plate (339) close to the hydraulic cylinder (32), and a key slot (336) is provided through the interior of the movable plate (331) in a number matching the number of key columns (337). The key columns (337) and the key slots (336) form a sliding pair in the vertical direction. When the diameter of the tube body (5) is larger than the initial load-bearing diameter of the cogwheel blanking plate (339), the gravity of the tube body (5) is transmitted to the cogwheel blanking plate (339), driving it to self-adaptively displace vertically downward along the key slot (336), so that the center of the tube body (5) coincides with the central axis of the clamping structure (33), thereby achieving coaxiality compensation for different tube diameters.

8. The steel pipe internal thread processing machine according to claim 7, characterized in that: A second spring (338) is fixedly connected between the cogwheel blanking plate (339) and the movable plate (331). When the tube body (5) is processed and separated from the cogwheel blanking plate (339), the elastic restoring force of the second spring (338) drives the blanking plate to reset vertically upward along the keyway (336) to restore the initial load-bearing diameter. The preload force of the second spring (338) matches the maximum adaptive weight of the tube body (5), ensuring that the small-diameter tube body (5) does not sink when loaded and the large-diameter tube body (5) can be adaptively compressed.

9. The steel pipe internal thread processing machine according to claim 6, characterized in that: Each two cog blanking plates (339) arranged in a left-right manner are set as a group, and a cog groove (3391) is provided on each side of the cog blanking plates (339) close to each other. A cog protrusion (3392) is fixedly connected to each side of the cog blanking plates (339) close to each other. The cog protrusion (3392) and the cog groove (3391) are arranged in a staggered manner. When the pipe diameter is smaller than the initial load-bearing diameter, the pipe body (5) is embedded in the staggered gap between the cog protrusion (3392) and the cog groove (3391); when the pipe diameter is larger than the initial load-bearing diameter, the pipe body (5) drives the cog blanking plates (339) on both sides to move in the opposite direction, and the cog protrusion (3392) and the cog groove (3391) slide along the tooth surface and engage, forming an annular support surface with a diameter smaller than the outer diameter of the pipe body (5), thereby realizing dual-mode adaptation of small-diameter engagement and large-diameter clamping.

10. The steel pipe internal thread processing machine according to claim 1, characterized in that: The loading module (4) further comprises a blocking groove (42), wherein the blocking groove (42) is opened in the middle of the loading shell (41), and the blocking plate (43) is rotatably connected to the inside of the blocking groove (42).

Images