Automatic corrugated pipe cutting device and method

Abstract

The invention relates to the technical field of automatic cutting, in particular to an automatic corrugated pipe cutting device and method.The device comprises a feeding mechanism and a cutting mechanism which are sequentially arranged in the feeding direction, and the feeding mechanism intermittently conveys a corrugated pipe body according to the fixed length through a profiling guide conveying assembly; the automatic corrugated pipe cutting device further comprises a positioning and clamping mechanism located between the feeding mechanism and the cutting mechanism and used for clamping and fixing the corrugated pipe body in the radial direction, and the positioning and clamping mechanism is provided with an axial positioning structure which is clamped into a corrugated groove of the corrugated pipe body so that at least part of the axial section of the corrugated pipe body can be limited to stretch out and draw back. The cutting mechanism performs cutting at the target corrugation phase position of the corrugated pipe body. Stable and reliable fixed-length positioning is achieved, the deformation risk in the machining process is reduced through profiling clamping constraint, the cutting quality and the end face consistency are improved, the automation degree and the production efficiency are improved, the application range is wide, and structure adjustment is convenient.

Description

Technical Field

[0001] This invention relates to the field of automated cutting technology, and more specifically, to an automated cutting device and method for corrugated pipes. Background Technology

[0002] Corrugated metal pipes are a typical type of thin-walled flexible tubing with a periodically undulating corrugated structure on their outer surface. They are widely used in vacuum systems, new energy equipment, and precision fluid transport. In actual production, corrugated metal pipes are usually supplied as continuous tubing or coils, requiring length cutting before subsequent assembly or welding processes. Due to the thin wall and low rigidity of corrugated metal pipes, traditional mechanical cutting or rigid clamping cutting methods can easily introduce large axial or radial stresses during feeding and cutting, leading to elliptical deformation of the pipe, uneven cut ends, and even burrs and cracks, affecting the quality of subsequent processing.

[0003] Existing feeding mechanisms still have shortcomings in terms of feeding stability and length accuracy. They mostly rely on friction drive or simple clamping methods to transport corrugated pipes, and their ability to constrain the axial and radial directions of the corrugated pipes during the feeding process is limited. When the feeding length is long, the start and stop are frequent, or the specifications of the corrugated pipe change, the pipe is prone to slippage, axial movement, or posture deviation, resulting in cumulative errors between the actual conveying length and the set length, which in turn affects the accuracy of the cutting position.

[0004] Secondly, regarding cutting positioning and clamping methods, existing technologies generally employ rigid or semi-rigid external clamping structures to hold the corrugated pipe. Because the outer surface of the metal corrugated pipe has a periodically undulating corrugated structure and a relatively thin wall, traditional flat or simple arc clamping surfaces are difficult to fully conform to the shape of the corrugated pipe, easily leading to localized stress concentration during clamping. Under cutting loads, the corrugated pipe is prone to localized collapse, elliptical deformation, or axial misalignment, affecting the flatness and perpendicularity of the cut end face. Summary of the Invention

[0005] In view of this, the present invention proposes an automated bellows cutting device and method, which aims to solve the shortcomings of the current technology in terms of feeding stability and length accuracy, as well as the problem that rigid or semi-rigid clamping is prone to local stress concentration.

[0006] This invention proposes an automated corrugated pipe cutting device, comprising a feeding mechanism and a cutting mechanism arranged sequentially along the feeding direction. The feeding mechanism intermittently feeds the corrugated pipe body at a fixed length via a contour-guided conveying assembly. The automated corrugated pipe cutting device further includes a positioning clamping mechanism located between the feeding mechanism and the cutting mechanism for radially clamping and fixing the corrugated pipe body. The positioning clamping mechanism has an axial positioning structure that engages with the corrugated groove of the corrugated pipe body, thereby restricting the extension and retraction of at least a portion of the axial segment of the corrugated pipe body. The cutting mechanism performs cutting at a target corrugated phase position of the corrugated pipe body.

[0007] Preferably, the positioning and clamping mechanism includes a radial clamping fixture with at least two jaws, the jaws being circumferentially distributed and the interior of the jaws enclosing a corrugated pipe clamping space; and the axial positioning structure includes an axial positioning engagement portion disposed on the inner sidewall of the jaws and capable of engaging the corrugated groove under the action of the radial clamping fixture.

[0008] Preferably, the axial positioning locking part is configured to conform to the corrugated groove.

[0009] Preferably, the plurality of grippers enclose to form a circular structure or a non-circular structure, and the axial positioning latching portion forms at least one complete circular structure or the axial positioning latching portion is evenly distributed in the circumferential direction.

[0010] Preferably, the feeding mechanism includes a conveying drive assembly and a contour guide conveying assembly. The feeding rotation spindle of the conveying drive assembly is connected to the drive roller of the contour guide conveying assembly. The drive roller cooperates with at least one driven roller to drive the synchronous conveyor belt with the contour clamping conveying channel to circulate.

[0011] Preferably, the synchronous conveyor belt includes a first synchronous belt and a second synchronous belt arranged opposite each other, and there is a contour clamping conveying channel between the first synchronous belt and the second synchronous belt for the corrugated pipe body to pass through; one of the first synchronous belt and the second synchronous belt is driven by a feeding rotating spindle, and the other is adjusted by a tensioning structure to adjust the clamping gap of the contour clamping conveying channel and cooperates with the clamping friction force.

[0012] Preferably, the cutting mechanism includes at least two cutting blades that feed or retract relative to each other. The cutting blades rotate circumferentially around the corrugated pipe axis and their own axis, respectively. The cutting mechanism can perform continuous unidirectional rotary cutting or reciprocating rotary cutting at a preset angle.

[0013] Compared with the prior art, the beneficial effects of the present invention are as follows: First, the feeding mechanism conveys the corrugated pipe body to a fixed length, which can effectively reduce the cutting length error caused by flexible deformation, instantaneous expansion and contraction or feeding fluctuations of the metal corrugated pipe, and improve the consistency of the cutting length and the quality of the cutting end face.

[0014] Secondly, the positioning and clamping mechanism performs synchronous axial and radial contouring fixation of the corrugated pipe, automatically completing dual axial and radial positioning during feeding and cutting, further improving cutting stability. Compared with single-sided roller feeding or rigid clamping, it can significantly reduce the risk of local stress concentration and deformation of thin-walled corrugated pipe during feeding, and improve the stability and consistency of the feeding process.

[0015] On the other hand, this application also provides an automated bellows cutting method, applied in the aforementioned automated bellows cutting device, comprising: S1. Start the feeding mechanism. The feeding mechanism combines the coarse fixed length mode and the fine positioning mode to transport the corrugated pipe body to the positioning and clamping mechanism at fixed length intervals, and align the cutting line of the cutting mechanism with the target corrugated phase position. S2. At least one side of the connection between the fixed-length section and the corrugated pipe body is synchronously fixed in the axial and radial directions by the positioning and clamping mechanism. S3. The connection is cut by the cutting mechanism.

[0016] Preferably, step S1 specifically includes: S11, Coarse fixed length mode conveying: Obtain the rotation amount of the main shaft of the feeding mechanism and the effective circumference data of the active roller, convert the rotation amount into the axial movement distance data of the bellows, and intermittently convey the bellows body according to the preset length data based on the axial movement distance data. S12, Fine Positioning Mode Conveying: After S11 completes one coarse fixed-length intermittent conveying, the corrugated phase state of the area adjacent to the connection between the fixed-length section and the corrugated pipe body is obtained. Based on the deviation between the corrugated phase state and the target corrugated phase position, the feeding mechanism is controlled to perform micro-compensation conveying so that the cutting line of the cutting mechanism is aligned with the target corrugated phase position. S13. Repeat S11-S12 until all fixed-length segments are cut.

[0017] Preferably, the feeding speed of the feeding mechanism in the fine positioning mode is lower than the feeding speed in the coarse length mode.

[0018] It is understood that the automatic corrugated pipe cutting method provided by the present invention has the same beneficial effects as the automatic corrugated pipe cutting device, and will not be described in detail here. Attached Figure Description

[0019] Various other advantages and benefits will become apparent to those skilled in the art upon reading the following detailed description of preferred embodiments. The accompanying drawings are for illustrative purposes only and are not intended to limit the invention. Furthermore, the same reference numerals denote the same parts throughout the drawings. In the drawings: Figure 1 This is a schematic diagram of the overall structure of an automated corrugated pipe cutting device provided in an embodiment of the present invention; Figure 2 This is a schematic diagram of the feeding mechanism provided in an embodiment of the present invention; Figure 3 This is a partial structural schematic diagram of the contour-guided conveying assembly provided in an embodiment of the present invention; Figure 4 A front view and a side view of the second synchronization belt provided for an embodiment of the present invention; Figure 5 A schematic diagram of the positioning and clamping mechanism and the cutting mechanism provided in an embodiment of the present invention; Figure 6 This is a partial structural schematic diagram of the positioning and clamping mechanism provided in an embodiment of the present invention; Figure 7 A schematic diagram of the cutting mechanism provided in an embodiment of the present invention; Figure 8 This is a schematic diagram of the driven large gear provided in an embodiment of the present invention; Figure 9 A schematic diagram of the feeding mechanism provided in an embodiment of the present invention; Figure 10 This is a cross-sectional view of the feeding mechanism provided in an embodiment of the present invention.

[0020] In the diagram: 1. Corrugated pipe support; 11. Corrugated pipe body; 2. Feeding mechanism; 21. Transport drive structure; 211. Motor support; 212. Servo motor one; 213. Coupling; 214. Feeding rotation spindle; 221. Adjusting roller; 222. First synchronous belt; 231. Driving roller; 232. Driven roller; 233. Second synchronous belt; 234. Arc guide groove; 24. Feeding mechanism support frame; 25. Tensioning structure; 251. Socket head cap screw; 252. H-type slider; 3. Positioning and clamping mechanism; 31. Clamping driver; 32. Pneumatic 33. Three-jaw radial clamping fixture; 4. Axial positioning and locking part; 5. Cutting mechanism; 6. Rotary drive assembly; 7. Servo motor II; 8. Driving pinion; 9. Driven gear; 10. Rotary telescopic assembly; 11. Positive thread nut; 12. Reverse thread nut; 13. Upper sliding ring bracket; 14. Lower sliding ring bracket; 15. Dovetail groove slide; 16. Stepper motor; 17. Cutting blade; 18. Cutting blade drive motor; 19. Main body bracket; 20. Unloading mechanism; 21. V-groove; 22. Pneumatic push rod; 33. Push rod head. Detailed Implementation

[0021] Exemplary embodiments of the present disclosure will now be described in more detail with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided to enable a more thorough understanding of the present disclosure and to fully convey the scope of the disclosure to those skilled in the art. It should be noted that, unless otherwise specified, embodiments and features in the embodiments of the present invention can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0022] Example 1

[0023] See Figure 1 As shown, this embodiment provides an automated corrugated pipe cutting device, including a feeding mechanism 2, a positioning and clamping mechanism 3, a cutting mechanism 4, and a unloading mechanism 5 arranged sequentially along the feeding direction.

[0024] See Figure 2 As shown, the feeding mechanism 2 includes a conveying drive assembly and a contour guide conveying assembly, as well as a corrugated pipe support 1 for holding the corrugated pipe body 11. The corrugated pipe support 1 is used to support and guide the corrugated pipe body 11, so that the corrugated pipe body 11 maintains a relatively stable posture before entering the feeding mechanism 2, and avoids the feeding stability being affected by sagging, swinging or deflection due to its own weight.

[0025] See Figure 2As shown, the conveying drive assembly includes a conveying drive structure 21, a feeding rotating main shaft 214, and a feeding mechanism support frame 24. The conveying drive structure 21 includes a motor bracket 211, a servo motor 212, and a coupling 213. During the feeding process, the servo motor 212 serves as the power source for the feeding mechanism 2 and is mounted on the motor bracket 211. The motor bracket 211 is fixedly mounted on the feeding mechanism support frame 24, which ensures the relative position stability between the servo motor 212 and the feeding rotating main shaft 214. The rotational torque output by the servo motor 212 is transmitted to the feeding rotating main shaft 214 through the coupling 213, thereby driving the rollers connected to it to rotate synchronously, realizing the clamping and conveying of the corrugated pipe body 11.

[0026] See Figure 3 As shown, the contour guide conveyor assembly is mounted on the feeding mechanism support frame 24 and includes a synchronous conveyor belt and a tensioning structure 25. The synchronous conveyor belt includes a first synchronous belt 222 and a second synchronous belt 233 arranged opposite each other, and there is a contour clamping conveying channel between the first synchronous belt 222 and the second synchronous belt 233 for the corrugated pipe body 11 to pass through.

[0027] See Figure 2 As shown, one of the first synchronous belts 222 and 233 is equipped with a drive roller 231 that is driven and connected to the feeding rotation main shaft 214, and at least one driven roller 232 that meshes with the drive roller 231. The feeding rotation main shaft 214 rotates to drive the drive roller 231 to rotate, thereby driving one of the first synchronous belts 222 and 233 to circulate along a closed loop. The driven roller 232 meshes with the drive roller 231 to provide rotational support and guidance for one of the first synchronous belts 222 and 233, providing traction force along the feeding direction, ensuring that one of the first synchronous belts 222 and 233 maintains a stable motion trajectory and appropriate tension during operation, thereby providing a continuous and uniform conveying driving force for the bellows body 11.

[0028] See Figure 2 As shown, the driven roller 232 adopts a double deep groove ball bearing support structure, forming symmetrical support and guidance for one of the first synchronous belt 222 and the second synchronous belt 233, effectively dispersing the radial load generated during the operation of the synchronous belt and suppressing the lateral displacement of the synchronous belt. Since the clamping effect of the first synchronous belt 222 and the second synchronous belt 233 on the corrugated pipe body 11 is distributed over a large contact area, this feeding method, compared with single-sided roller feeding or rigid clamping, can significantly reduce the risk of local stress concentration and deformation of the thin-walled corrugated pipe body 11 during the feeding process, and improve the stability and consistency of the feeding process.

[0029] See Figure 2 and Figure 3 As shown, the remaining one of the first synchronous belt 222 and the second synchronous belt 233 is provided with a number of meshing adjustment rollers 221. Under the action of the tensioning structure 25, the adjustment rollers 221 adjust and apply a clamping action to the corrugated pipe body 11, so that the corrugated pipe body 11 can achieve stable clamping and conveying under the combined action of the first synchronous belt 222 and the second synchronous belt 233.

[0030] To accommodate bellows bodies 11 with different outer diameters and to compensate for the elastic deformation of the synchronous belt during long-term operation, a tensioning structure 25 is provided for position and tension adjustment. The tensioning structure 25 includes an internal hexagonal screw 251 and an H-shaped slider 252, which are threaded together. When the internal hexagonal screw 251 is rotated, it forms a threaded transmission and guiding sliding relationship with the H-shaped slider 252, converting the rotational motion of the internal hexagonal screw 251 into a linear displacement of the H-shaped slider 252 in the Z-axis direction. An adjusting roller 221 is mounted on the H-shaped slider 252. The displacement of the H-shaped slider 252 further drives the adjusting roller 221 to produce a corresponding displacement, thereby changing the tension state of the remaining one of the first synchronous belt 222 and the second synchronous belt 233, as well as the clamping gap between them.

[0031] By adjusting the tensioning structure 25, the clamping force between the first synchronous belt 222 and the second synchronous belt 233 can be precisely set according to the outer diameter of the corrugated pipe body 11 and the feeding conditions. This ensures that the corrugated pipe body 11 does not slip during the feeding process and avoids applying excessive extrusion force to the thin-walled corrugated pipe body 11, which helps to improve the stability and consistency of the feeding process.

[0032] In actual operation, after the servo motor 212 starts, it drives the feeding rotating spindle 214 to rotate via the coupling 213. The feeding rotating spindle 214 drives the drive roller 231 to drive one of the first synchronous belt 222 and the second synchronous belt 233. Under the clamping friction of the first synchronous belt 222 and the second synchronous belt 233, the corrugated pipe body 11 moves steadily along the feeding direction and is transported to the subsequent station. When it is necessary to replace the corrugated pipe body 11 of different specifications or adjust the clamping pressure, the H-shaped slider 252 is moved by rotating the hexagonal screw 251, thereby realizing the rapid adjustment of the clamping gap and the tension of the synchronous belt, ensuring the continuous and stable operation of the feeding mechanism 2.

[0033] See Figure 4As shown, both the first synchronous belt 222 and the second synchronous belt 233 adopt a specially designed synchronous belt structure. Their outer rings are machined with arc-shaped guide grooves 234 along their length direction, matching the outer contour of the corrugated pipe body 11. These include arc-shaped guide groove one and arc-shaped guide groove two, forming a contoured clamping and conveying channel between them. One of the arc-shaped guide grooves is located on the first synchronous belt 222, and the other is located on the second synchronous belt 233. The arc-shaped guide grooves 234 can also be provided with several contoured teeth matching the corrugated recesses and / or corrugated protrusions on the outer contour of the corrugated pipe body 11, enhancing the friction between the first synchronous belt 222 and the second synchronous belt 233 and the outer wall of the corrugated pipe body 11.

[0034] The inner rings of the first synchronous belt 222 and the second synchronous belt 233 are both provided with trapezoidal teeth and mesh with the corresponding rollers to form a transmission, thereby ensuring power transmission efficiency and synchronization accuracy while effectively constraining the radial position of the bellows body 11.

[0035] In this embodiment, the tensioning structure 25 and the rotating telescopic component 42 can be adjusted to adapt to metal corrugated pipe bodies 11 with different outer diameters and specifications. The structure is easy to adjust and has strong versatility, which is conducive to its application in multi-specification product production scenarios.

[0036] The feeding mechanism 2 intermittently feeds the corrugated pipe body 11 at a fixed length through the contour guide conveying assembly, and aligns the cutting line of the cutting mechanism 4 with the target corrugated phase position. At least one side of the connection between the fixed length section and the corrugated pipe body 11 is synchronously contoured and fixed in the axial and radial directions through the positioning clamping mechanism 3, and the connection is circumferentially cut by the cutting mechanism 4.

[0037] In this embodiment, the feeding mechanism 2 adopts a synchronous belt clamping and conveying method with the upper and lower parts arranged, and a guide structure matching the shape of the corrugated pipe body 11 is provided on the surface of the synchronous belt so that the corrugated pipe body 11 is evenly distributed in terms of force during the feeding process.

[0038] See Figure 6 As shown, the positioning and clamping mechanism 3 is used to radially clamp and fix the bellows body 11. It includes a radial clamping fixture with at least two jaws (e.g., a pneumatic three-jaw radial clamping fixture 32 driven by the clamping driver 31). The jaws are circumferentially distributed, and the inside of the jaws encloses a bellows clamping space. The size and shape of the clamping space can be adjusted according to the size of the bellows to accommodate bellows of different specifications.

[0039] The positioning and clamping mechanism 3 also has an axial positioning structure that engages with the corrugated groove of the bellows body 11, thereby restricting the extension and retraction of at least a portion of the axial section of the bellows body 11. The axial positioning structure includes an axial positioning engagement part 33 located on the inner wall of the clamping jaws and capable of engaging with the corrugated groove under the action of the radial clamping fixture. The axial positioning structure restricts the axial movement of the bellows, ensuring that the axial position of the bellows is fixed during processing. When the radial clamping fixture clamps the bellows, the axial positioning engagement part 33 engages with the corrugated groove of the bellows body 11, thereby achieving axial positioning and ensuring that the axial position of the bellows is precisely fixed while it is being radially clamped, improving the accuracy and efficiency of subsequent processing.

[0040] The axial positioning latch 33 is contoured to the corrugated groove, enabling the axial positioning latch 33 to make contoured surface contact with the corrugated groove, achieving damage-free clamping. Simultaneously, the axial positioning latch 33 is contoured to at least one corrugated groove; by controlling the number of contoured corrugated grooves, the contoured contact area can be controlled, improving clamping stability.

[0041] Several grippers may form a circular or non-circular structure, and the axial positioning latch 33 may form at least one complete circular structure or be evenly distributed in the circumferential direction. The circumferential distribution ensures that the clamping force is evenly distributed around the bellows, avoiding damage to the bellows or machining errors due to uneven force.

[0042] See Figure 6 As shown, the positioning and clamping mechanism 3 adopts an external clamping structure. This structure fixes the bellows body 11 through the closing action of the jaws. Combined with a contour-following positioning method that matches the corrugations on the outer wall of the bellows body 11, it performs dual axial and radial positioning of the fixed-length section of the bellows body 11 after feeding. This dual positioning ensures the stability of the fixed-length section of the bellows body 11 in space, providing a stable and reliable cutting reference for the cutting mechanism 4 and avoiding dimensional deviations caused by workpiece movement. Contour-following positioning also effectively disperses clamping force, preventing localized compression that could deform or damage the bellows body 11. Compared to traditional planar or simple curved surface clamping, the axial positioning latch 33 better adapts to the complex outer surface shape of the bellows body 11, improving clamping stability and repeatability.

[0043] The fixed-length section is connected to the corrugated pipe body 11 on both sides by positioning and clamping mechanisms 3 for axial and radial synchronous contouring fixation. Applying clamping force on both sides at the same time improves the overall fixation effect and avoids positional displacement caused by vibration or external force, thereby ensuring processing accuracy.

[0044] See Figure 5 and Figure 7As shown, the cutting mechanism 4 performs cutting at the target corrugated phase position of the corrugated pipe body 11, including at least two cutting blades 43 that feed or retract relative to each other. The cutting blades 43 rotate around the axis of the corrugated pipe body 11 and their own axis respectively, and the cutting mechanism 4 continuously rotates and cuts in one direction or rotates and cuts in a preset angle.

[0045] In this embodiment, the cutting mechanism 4 uses rotary grinding to perform circumferential cutting on the corrugated pipe body 11. By combining the self-rotation grinding of the cutting blade 43 with the circumferential movement around the corrugated pipe body 11, the cutting load is distributed throughout the entire circumference, effectively avoiding the instantaneous impact force and stress concentration problems caused by traditional one-time radial cutting, significantly reducing burrs, edge collapse and deformation on the cutting end face, and obtaining a high-quality cutting end face that meets the requirements of subsequent welding processes.

[0046] See Figure 5 and Figure 7 As shown, the cutting mechanism 4 includes a rotary drive assembly 41, a rotary telescopic assembly 42, a cutting blade 43 (e.g., a grinding wheel), a cutting blade drive motor 44, and a main support 45. The cutting mechanism 4 is used to perform circumferential grinding and cutting of the wall of the corrugated pipe body 11 by the cutting blade 43 under the combined action of circumferential motion and grinding after the corrugated pipe body 11 is clamped and positioned by the positioning and clamping mechanism 3. This allows for the transverse cutting of the thin-walled corrugated pipe body 11 under relatively small force conditions, reducing the risk of end-face burrs and deformation.

[0047] See Figure 5 and Figure 7 As shown, the rotary drive assembly 41 is mounted on the main support 45 and includes a servo motor 411, a driving pinion 412, and a driven gear 413. During operation, the rotary drive assembly 41 provides circumferential rotation around the axis of the bellows body 11. Under control commands, the servo motor 411 outputs torque to drive the driving pinion 412 to rotate. The driving pinion 412 meshes with the driven gear 413, thereby causing the driven gear 413 and related components mounted thereon to rotate circumferentially relative to the main support 45 around the axis of the bellows body 11. Through this circumferential rotation, the cutting blade 43 can continuously cover the same cutting position along the circumference of the bellows body 11, avoiding the concentration of cutting force caused by traditional single-pass radial cutting.

[0048] See Figure 5 , Figure 7 and Figure 8As shown, when there are two cutting blades 43, the rotary telescopic assembly 42 is mounted on the driven large gear 413 and includes a stepper motor 426, a positive thread nut 421, a negative thread nut 422, an upper sliding ring bracket 423, and a lower sliding ring bracket 424. During operation, the rotary telescopic assembly 42 is used to achieve radially symmetrical feeding and retraction of the cutting blade 43 while it rotates and cuts, thereby controlling the contact state and cutting depth between the cutting blade 43 and the wall of the bellows body 11. Under control commands, the stepper motor 426 causes the positive thread nut 421 and the negative thread nut 422 to generate linear displacements in opposite directions under the same drive. This drives the upper sliding ring bracket 423 and the lower sliding ring bracket 424 to move towards each other or away from each other along the dovetail groove slide 425. This allows the cutting blade 43 mounted on the upper sliding ring bracket 423 and the lower sliding ring bracket 424 to obtain radially symmetrical feed or retraction movements.

[0049] Due to the opposite displacement characteristics of the positive thread nut 421 and the negative thread nut 422, the upper sliding ring bracket 423 and the lower sliding ring bracket 424 can open and close symmetrically in a synchronous and equal manner, so that the cutting blade 43 maintains a relatively stable central position during the feeding process, reducing off-center load and impact, which is suitable for low-stress cutting of thin-walled corrugated pipe body 11.

[0050] The cutting blade drive motor 44 drives the cutting blade 43 to rotate around its own axis, creating a grinding effect. During the cutting stage, the cutting blade drive motor 44 drives the cutting blade 43 to rotate at high speed, while the servo motor 411 drives the driven large gear 413 to move the cutting blade 43 circumferentially around the axis of the bellows body 11. Under the superposition of the above movements, the cutting blade 43 grinds the wall of the bellows body 11 during the circumferential coverage process. The stepper motor 426 drives the rotary telescopic component 42 to gradually control the cutting depth of the cutting blade 43 according to the preset feed amount, so that the cutting blade 43 performs continuous and uniform circumferential grinding on the pipe wall until the pipe wall is ground through, achieving transverse cutting. After the cutting is completed, the stepper motor 426 drives the rotary telescopic component 42 in the reverse direction, so that the upper sliding ring support 423 and the lower sliding ring support 424 retract symmetrically, the cutting blade 43 disengages from the bellows body 11, and the rotary drive component 41 stops the circumferential movement or returns to the predetermined initial position, completing one cutting cycle.

[0051] Furthermore, the rotary drive assembly 41 can employ a reciprocating rotary cutting method with a preset angle or a continuous unidirectional rotary cutting method. The reciprocating rotary cutting method with a preset angle causes the driven large gear 413 to rotate alternately in the clockwise and counterclockwise directions within the preset angle range. During the reciprocating rotation, the cutting blade 43 performs repeated circumferential grinding on the same cutting end face, which is beneficial for further finishing the cutting end face, thereby improving the flatness of the end face and reducing burr defects.

[0052] Meanwhile, in this embodiment, both the clamping and cutting processes adopt a low-stress constraint method, which can effectively reduce the elliptical deformation or local indentation of the thin-walled corrugated pipe body 11 during the feeding, positioning and cutting stages, and improve the consistency of the finished product.

[0053] See Figure 9 As shown, after the cutting mechanism 4 completes the cutting of the fixed-length section of the corrugated pipe body 11, the fixed-length section is pushed axially to the downstream end of the positioning and clamping mechanism 3 under the continuous feeding action of the feeding mechanism 2, and then detaches from the clamping area. At this time, under the combined action of its own gravity and the feeding extrusion force, the fixed-length section enters the V-groove 51 of the unloading mechanism 5 located below the cutting mechanism 4. The V-groove 51 is used to form a self-centering support for the fixed-length section, so that the fixed-length section maintains a stable posture during unloading and temporary storage, and avoids rolling or displacement.

[0054] The feeding mechanism 5 includes a V-groove 51, a feeding slide, and a pneumatic pusher 52. The pneumatic pusher 52 is installed at the starting end of the feeding slide, and its front end is equipped with an elastic rubber pusher head 53. Through linear reciprocating motion, it pushes fixed-length sections one by one into the feeding slide for subsequent feeding. The flexibility and cushioning characteristics of the rubber pusher head 53 prevent damage to the fixed-length sections from rigid impacts, while also enhancing the stability of the feeding process. (See reference...) Figure 10 As shown, the rubber push rod head 53 is preferably a right-angled trapezoidal structure, with its inclined surface facing the bottom of the upper V-shaped groove 51 and inclined downward along the pushing direction. This allows only one fixed-length segment to be pushed out at a time, while simultaneously "pushing" away other fixed-length segments to prevent excessive segments from entering the feeding chute and causing jamming. Through the synergistic effect of the above mechanical structure and pneumatic components, continuous feeding can be achieved, providing a stable workpiece input for subsequent processes.

[0055] This embodiment organically integrates the feeding, clamping, cutting and unloading processes, realizing continuous operation of the corrugated pipe body 11 from raw material supply to fixed-length cutting and automatic unloading, reducing the frequency of manual participation and intervention, improving overall processing efficiency, and is suitable for batch and continuous production needs.

[0056] Example 2

[0057] This embodiment provides an automated bellows cutting method, applied in an automated bellows cutting device according to Embodiment 1, comprising: S1. Start the feeding mechanism 2. The feeding mechanism 2, in combination with the coarse fixed length mode and the fine positioning mode, delivers the corrugated pipe body 11 to the positioning and clamping mechanism 3 at fixed lengths and intermittently, and aligns the cutting line of the cutting mechanism 4 with the target corrugated phase position.

[0058] S2. The positioning and clamping mechanism 3 is used to simultaneously fix at least one side of the connection between the fixed length section and the corrugated pipe body 11 in the axial and radial directions.

[0059] S3. Cut the connection point using the cutting mechanism 4.

[0060] Preferably, step S1 specifically includes: S11, Coarse fixed length mode conveying: Obtain the rotation amount of the feeding rotating main shaft 214 in the feeding mechanism 2 and the effective circumference data of the active roller 231, convert the rotation amount into the axial movement distance data of the corrugated pipe body 11, and intermittently convey the corrugated pipe body 11 according to the preset length data based on the axial movement distance data.

[0061] The servo motor 212 of the feeding mechanism 2 operates according to the set parameters. By acquiring the rotation information of the servo motor 212 and combining it with the effective circumference of the active roller 231 and the transmission relationship, the rotation is converted into the axial movement distance of the corrugated pipe body 11, thereby realizing the coarse fixed-length conveying of the corrugated pipe body 11.

[0062] S12, Fine positioning mode conveying: After S11 completes one coarse fixed length intermittent conveying, the corrugated phase state of the area adjacent to the connection between the fixed length section and the corrugated pipe body 11 is obtained. Based on the deviation between the corrugated phase state and the target corrugated phase position, the feeding mechanism 2 is controlled to perform micro-compensation conveying so that the cutting line of the cutting mechanism 4 is aligned with the target corrugated phase position.

[0063] When the corrugated pipe body 11 of the theoretical conveying length enters the preset fine positioning length window (which can be preset according to the actual situation), the feeding mode is switched from coarse length setting mode to fine positioning mode.

[0064] A laser displacement sensor (not shown in the figure) is installed near the alignment position of the cutting line of the cutting mechanism 4. The laser displacement sensor and the cutting mechanism 4 have a fixed and known axial positional relationship. The laser displacement sensor performs non-contact detection on the outer surface of the bellows body 11, and collects the displacement change signal formed by its corrugations in real time. The sensor identifies the peak and trough features of the displacement change signal to determine the corrugation phase state in the area adjacent to the current cutting position.

[0065] Based on the deviation between the detected ripple phase state and the target ripple phase position, the feeding mechanism 2 is controlled to perform micro-compensation feeding, so that the ripple phase state of the area adjacent to the current cutting position is the target ripple phase position, thereby aligning the cutting line to the target ripple phase position, thus achieving precise correction of the cutting position and completing precise length positioning.

[0066] S13. Repeat S11-S12 until all fixed-length segments are cut.

[0067] Preferably, the feeding speed of the feeding mechanism 2 in the fine positioning mode is lower than that in the coarse length mode. In the fine positioning mode, the feeding speed is reduced and a small-step compensation is performed to reduce the positioning error of the corrugated pipe body 11 caused by inertia and elastic rebound.

[0068] In this embodiment, by combining the coarse length determination method of servo rotation conversion with the fine positioning method of corrugated structure based on laser displacement sensor, the cutting length error caused by flexible deformation, instantaneous expansion and contraction or feeding fluctuation of the metal corrugated pipe body 11 can be effectively reduced, thereby improving the consistency of cutting length and the quality of cutting end face.

[0069] Because the metal corrugated pipe body 11 has a thin wall and high flexibility, it is prone to length deviation during feeding due to elastic expansion and contraction, rebound, or feeding fluctuations. This embodiment uses a corrugated structure feature recognition method for precise end positioning, which can effectively reduce the cumulative error caused by conventional length-fixing methods and improve the consistency and repeatability of fixed-length cutting. At the same time, the external clamping positioning and holding mechanism 3 uses the corrugated structure of the outer wall of the corrugated pipe body 11 as a positioning reference, automatically completing axial and radial dual positioning during feeding and cutting, further improving cutting stability, and is especially suitable for metal corrugated pipe bodies 11 with obvious corrugation structure and thin wall thickness.

[0070] Those skilled in the art will understand that embodiments of this application can be provided as methods, systems, or computer program goods. Therefore, this application can take the form of a completely hardware embodiment, a completely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, this application can take the form of a computer program goods embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.

[0071] This application is described with reference to flowchart illustrations and / or block diagrams of methods, apparatus (systems), and computer program goods according to embodiments of this application. It will be understood that each block of the flowchart illustrations and / or block diagrams, and combinations of blocks in the flowchart illustrations and / or block diagrams, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, special-purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, generate instructions for implementing the flowchart... Figure 1 One or more processes and / or boxes Figure 1 A device that provides the functions specified in one or more boxes.

[0072] These computer program instructions may also be stored in a computer-readable storage medium that can direct a computer or other programmable data processing device to function in a particular manner, such that the instructions stored in the computer-readable storage medium produce an article of manufacture including instruction means, which are implemented in a process Figure 1 One or more processes and / or boxes Figure 1 The function specified in one or more boxes.

[0073] These computer program instructions may also be loaded onto a computer or other programmable data processing equipment to cause a series of operational steps to be performed on the computer or other programmable equipment to produce a computer-implemented process, thereby providing instructions that execute on the computer or other programmable equipment for implementing the process. Figure 1 One or more processes and / or boxes Figure 1 The steps of the function specified in one or more boxes.

[0074] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and not to limit it. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that modifications or equivalent substitutions can still be made to the specific implementation of the present invention. Any modifications or equivalent substitutions that do not depart from the spirit and scope of the present invention should be covered within the scope of protection of the claims of the present invention.

Claims

1. An automated corrugated pipe cutting device, comprising a feeding mechanism (2) and a cutting mechanism (4) arranged sequentially along the feeding direction, characterized in that, The feeding mechanism (2) intermittently conveys the corrugated pipe body at a fixed length through the contour guide conveying assembly. The corrugated pipe automatic cutting device also includes a positioning clamping mechanism (3) located between the feeding mechanism (2) and the cutting mechanism (4) for radially clamping and fixing the corrugated pipe body. The positioning clamping mechanism (3) has an axial positioning structure that engages with the corrugated groove of the corrugated pipe body (11) to restrict the extension and retraction of at least a portion of the axial section of the corrugated pipe body (11). The cutting mechanism (4) performs cutting at the target corrugated phase position of the corrugated pipe body (11).

2. The corrugated pipe automated cutting device according to claim 1, characterized in that, The positioning clamping mechanism (3) includes a radial clamping fixture with at least two jaws, the jaws being circumferentially distributed and the interior of the jaws enclosing a corrugated pipe clamping space; and the axial positioning structure includes an axial positioning snap-in part (33) disposed on the inner sidewall of the jaws and capable of snapping into the corrugated groove under the action of the radial clamping fixture.

3. The corrugated pipe automated cutting device according to claim 2, characterized in that, The axial positioning latch (33) is configured to conform to the corrugated groove.

4. The corrugated pipe automated cutting device according to claim 2, characterized in that, The clamps may form a circular structure or a non-circular structure, and the axial positioning latch (33) may form at least one complete circular structure or the axial positioning latch (33) may be evenly distributed in the circumferential direction.

5. The corrugated pipe automated cutting device according to claim 1, characterized in that, The feeding mechanism (2) includes a conveying drive assembly and a contour guide conveying assembly. The feeding rotation spindle (214) of the conveying drive assembly is connected to the active roller (231) of the contour guide conveying assembly. The active roller (231) cooperates with at least one driven roller (232) to drive the synchronous conveyor belt with the contour clamping conveying channel to run in a cycle.

6. The corrugated pipe automated cutting device according to claim 5, characterized in that, The synchronous conveyor belt includes a first synchronous belt (222) and a second synchronous belt (233) arranged opposite each other. There is a contour clamping conveying channel between the first synchronous belt (222) and the second synchronous belt (233) for the corrugated pipe body (11) to pass through. One of the first synchronous belt (222) and the second synchronous belt (233) is driven by the feeding rotating spindle (214), and the other is adjusted by the tensioning structure (25) to adjust the clamping gap of the contour clamping conveying channel and cooperates with the clamping friction force.

7. The corrugated pipe automated cutting device according to claim 1, characterized in that, The cutting mechanism (4) includes at least two cutting blades (43) that feed or retract relative to each other. The cutting blades (43) rotate around the corrugated pipe axis and their own axis respectively. The cutting mechanism (4) continuously rotates and cuts in one direction or rotates and cuts at a preset angle.

8. An automated cutting method for corrugated pipes, characterized in that, Applied in an automated corrugated pipe cutting device as described in any one of claims 1-7, comprising: S1. Start the feeding mechanism (2). The feeding mechanism (2) combines the coarse fixed length mode and the fine positioning mode to transport the corrugated pipe body (11) to the positioning clamping mechanism (3) at fixed length intervals, and make the cutting line of the cutting mechanism (4) aligned with the target corrugated phase position. S2. The positioning clamping mechanism (3) performs axial and radial synchronous contouring fixation on at least one side of the connection between the fixed length section and the corrugated pipe body (11); S3. The connection is cut by the cutting mechanism (4).

9. The automated cutting method for corrugated pipes according to claim 8, characterized in that, Step S1 specifically includes: S11, Coarse fixed length mode conveying: Obtain the rotation amount of the feeding rotating main shaft (214) in the feeding mechanism (2) and the effective circumference data of the active roller (231), convert the rotation amount into the axial movement distance data of the bellows, and intermittently convey the bellows body (11) according to the preset length data based on the axial movement distance data. S12, fine positioning mode conveying: after S11 completes one coarse fixed length intermittent conveying, the corrugated phase state of the area adjacent to the connection between the fixed length section and the corrugated pipe body (11) is obtained. Based on the deviation between the corrugated phase state and the target corrugated phase position, the feeding mechanism (2) is controlled to perform micro-compensation conveying so that the cutting line of the cutting mechanism (4) is aligned with the target corrugated phase position. S13. Repeat S11-S12 until all fixed-length segments are cut.

10. The automated cutting method for corrugated pipes according to claim 9, characterized in that, The feeding speed of the feeding mechanism (2) in the fine positioning mode is less than that in the coarse length mode.

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