Cutting device for bevel angle of groove of drainage pipeline

Abstract

The invention relates to the technical field of drainage pipeline cutting equipment, in particular to a drainage pipeline groove bevel angle cutting device which comprises a rack, a rotary table seat is rotatably mounted in a first supporting seat, a clamping table seat is fixedly mounted on the side portion of the rotary table seat, a plurality of clamping blocks are arranged on the side portion of the clamping table seat, and a first shaft rod is arranged above a second supporting seat. The first shaft rod is provided with a rotating arm beam, one side of the rotating arm beam is provided with a Z-axis linear module, the sliding end of the Z-axis linear module is fixedly provided with a box body, a swing arm rod is arranged in the box body, a cam column rotating along the X axis is arranged above the swing arm rod, and the bottom end of the swing arm rod penetrates out of the box body and is fixedly connected with a laser cutting machine. The intermittent transmission structure of the cam column and the swing arm rod is adopted, the gear return clearance and angle error accumulation are eliminated, and the cutting precision is kept stable for a long time; and meanwhile, a servo system and programming debugging are not needed, the cost is controllable, operation is easy and convenient, and the method is particularly suitable for repeated groove cutting operation of large-batch pipelines.

Description

Technical Field

[0001] This invention relates to the field of drainage pipe cutting equipment technology, and specifically discloses a drainage pipe beveling angle cutting device. Background Technology

[0002] During the connection process of drainage pipes, regardless of whether welding, hot fusion, or bonding is used, a certain angled bevel must be machined at the pipe ends. The main function of the bevel is to increase the contact area at the pipe ends, allowing the filler material to fully penetrate the joint and form a uniform and dense connection layer, thereby ensuring the sealing and structural strength of the pipeline system. In addition, the bevel also facilitates the alignment of construction tools and reduces defects such as porosity and incomplete fusion. Therefore, machining the bevel is a key technological measure to ensure the connection quality, sealing performance, and overall safety of drainage pipes.

[0003] The invention disclosed in CN120326688A, a pipe cutting device for construction engineering, includes a base, a clamping mechanism, and a cutting mechanism. The base has an adjusting assembly. Plate 1 and Plate 2 are slidably connected, and the ends of Plate 2 are connected to the cutting mechanism via telescopic rods and driven to rotate by a motor. A sliding assembly is located at the bottom of the base, and Plate 3 slides on a slide rail. An electric push rod drives a fixing block to press against the slide rail. A limiting assembly is located on the fixing block, and a limiting rod can be inserted into a limiting hole at the bottom of Plate 2. An auxiliary assembly prevents disengagement via a spring-loaded limiting block. This device can achieve centering clamping and equidistant cutting of pipes of different diameters.

[0004] In existing technologies, two main methods are used for beveling drainage pipes. The former uses a handheld beveling machine, which relies heavily on manual operation. Due to its poor cutting accuracy and consistency, and low efficiency, most existing technologies employ cutting techniques similar to those used in water supply pipe cutting devices. The latter uses a motor that directly drives the cutting mechanism. If the beveling angle needs adjustment, a servo motor combined with a precision reducer and encoder closed-loop control logic is typically used. However, after long-term operation, the reducer gears in these existing technologies are prone to wear and backlash, leading to accumulated errors in the swing angle and making it difficult to maintain cutting accuracy. Secondly, servo systems are expensive, and the debugging process is complex, requiring highly skilled operators. Furthermore, this type of solution requires reprogramming or calibration each time different pipe specifications are cut, making it unsuitable for repetitive cutting of large batches of pipes of the same specification. Therefore, there is an urgent need for a cutting device that offers good long-term accuracy maintenance, low cost, and is suitable for mass production of beveling drainage pipes. Summary of the Invention

[0005] To address the problems in current drainage pipe beveling and angle cutting operations, where the use of servo motors, reducers, and encoders easily leads to gear wear and backlash, resulting in accumulated swing angle errors, difficulty in maintaining cutting accuracy, high costs, and complex debugging procedures, making it unsuitable for large-scale repetitive cutting of pipes of the same specifications, this invention provides a drainage pipe beveling and angle cutting device.

[0006] To address the above problems, the present invention provides the following technical solution: A beveling and angled cutting device for drainage pipes includes a frame with a first support base and a second support base fixedly mounted on it. A turntable is rotatably mounted inside the first support base, and a clamping base is fixedly mounted on the side of the turntable. Multiple clamping blocks for clamping the drainage pipe are provided on the side of the clamping base. The drainage pipe can pass through the turntable and clamping base along the X-axis. A first shaft rotating along the X-axis is positioned above the second support base, and a rotating arm beam is fixedly mounted on the first shaft. A Z-axis linear module is fixedly mounted on the side of the rotating arm beam closest to the drainage pipe. A housing is fixedly mounted on the sliding end of the Z-axis linear module, and a swing arm is disposed inside the housing. A cam column rotating along the X-axis is positioned above the swing arm, and the top end of the swing arm is driven by the cam column. The cam column drives the swing arm to reciprocate intermittently along the Y-axis. The bottom end of the swing arm extends out of the housing and is fixedly connected to a laser cutting machine, the nozzle of which is positioned above the drainage pipe.

[0007] Preferably, a tapered roller bearing is provided between the first support base and the turntable base, a first suspension platform is fixedly installed on the side of the frame, a gearbox is fixedly installed on the first suspension platform, a first asynchronous motor that drives the gearbox is fixedly installed on the side of the gearbox, a first belt pulley is fastened to the output shaft of the gearbox, a second belt pulley is fastened to the end of the turntable base away from the clamping base, and a belt for synchronous linkage is installed between the first belt pulley and the second belt pulley.

[0008] Preferably, the side of the clamping base has multiple radially distributed adjustment grooves, which are evenly arranged. Each adjustment groove is provided with a slidingly fitted adjustment block, and a tightening bolt is installed between the adjustment block and the clamping block.

[0009] Preferably, a first hydraulic push rod is hingedly installed inside the frame, the swing arm beam is arranged along the Y-axis direction, the first shaft is arranged below the swing arm beam, a sleeve block is fixedly fitted around the first shaft, the sleeve block is fastened to the middle of the bottom end of the swing arm beam, an outer probe plate is fixedly installed on the bottom side of the swing arm beam away from the drainage pipe, and the piston rod end of the first hydraulic push rod is hinged to the outer probe plate.

[0010] Preferably, a second asynchronous motor is fixedly installed on the side of the housing, a third support base and a fourth support base are fixedly installed inside the housing, a second shaft arranged along the X-axis is rotatably installed in the third support base, the second shaft is connected to the output shaft of the second asynchronous motor, the cam column is fastened to the periphery of the second shaft, a third shaft arranged along the Y-axis is rotatably installed in the fourth support base, the middle part of the swing arm is fastened to the third shaft, and a first opening is provided at the bottom of the housing to facilitate the passage of the swing arm.

[0011] Preferably, the outer peripheral wall of the cam column is provided with a concave arc surface, and a curved groove is formed on the concave arc surface. The curved groove is a closed arc structure. The top end of the rocker arm is provided with a spherical protrusion, which is arranged inside the curved groove and slides in cooperation with the inner wall of the curved groove. The bottom end of the rocker arm is provided with a ring portion that is fastened to the housing of the laser cutting machine. For each rotation of the cam column, the spherical protrusion slides one revolution in the curved groove, and the rocker arm reciprocates once along the Y-axis direction.

[0012] Preferably, the curved groove includes a curved groove section and a flat groove section, each with two sections, and the curved groove section and the flat groove section are arranged alternately. The two flat groove sections are arranged at both ends of the cam column and are connected to the two curved groove sections. When the spherical protrusion slides in the curved groove section, the rocker arm rotates along the Y-axis. When the spherical protrusion slides in the flat groove section, the rocker arm is in an intermittently stopped state.

[0013] Preferably, a second suspension platform is fixedly installed on the side of the frame. A first support pipe seat and a second support pipe seat are provided on the frame. A third support pipe seat is provided on the second suspension platform. The first support pipe seat, the second support pipe seat, and the third support pipe seat are all provided with V-shaped grooves. Two symmetrically arranged and rotatable ball bearings are provided in the V-shaped grooves. The ball bearings slide in contact with the outer wall of the drainage pipe. A first horizontal plate is fixedly connected to the bottom end of the first support pipe seat, the second support pipe seat, and the third support pipe seat. A second horizontal plate is provided below the first horizontal plate. A long bolt is provided between the first horizontal plate and the second horizontal plate. A spring is provided around the long bolt. The two ends of the spring are respectively fixedly connected to the first horizontal plate and the second horizontal plate.

[0014] Preferably, a slide rail arranged along the X-axis is fixedly installed on the frame, a slider is slidably installed on the slide rail, a third horizontal plate is fastened to the top of the slider, a vertical plate is fixedly installed on the top of the third horizontal plate, a stepper motor and a push plate are respectively arranged on both sides of the vertical plate, the output shaft of the stepper motor is fastened to the push plate, and the push plate contacts the end of the drainage pipe; a right-angle seat is fixedly installed on the frame, a second hydraulic push rod arranged obliquely is fixedly installed in the right-angle seat, a rotating wheel is rotatably installed at the piston rod end of the second hydraulic push rod, and the rotating wheel is rotatably engaged with the outer wall of the drainage pipe.

[0015] Preferably, the platform has a second opening, and a baffle that is fastened to the platform is provided on the upper periphery of the second opening. A conveying cylinder that is fastened to the platform is fixedly installed below the second opening. A transport vehicle is provided inside the platform. The bottom outlet of the conveying cylinder is arranged above the transport vehicle. A third opening is provided on the side of the platform to facilitate the entry and exit of the transport vehicle.

[0016] Compared with the prior art, the present invention has the following beneficial effects: 1. This invention features a cam column rotating along the X-axis within a housing. Its outer peripheral wall has a closed curved groove. A spherical protrusion at the top of the rocker arm is embedded in and slides within this groove. The curved groove consists of two alternating curved groove sections and two flat groove sections, with the flat groove sections located at both ends of the cam column and arranged along the YZ plane. When the spherical protrusion enters the flat groove section, the rocker arm remains intermittently stopped due to the constant groove bottom radius, mechanically locking the tilt angle of the laser cutting machine. This engagement structure effectively eliminates backlash, and after long-term operation, the contact-sliding engagement between the cam and the spherical protrusion actually produces a wear equalization effect, resulting in superior accuracy retention compared to a closed-loop servo system. Furthermore, the flat groove section allows locking at any angle, breaking the technical bias that cams can only move continuously and cannot be precisely positioned, achieving high-precision repeatable positioning without sensor feedback.

[0017] 2. This invention uses only a second asynchronous motor to directly drive the cam column. By replacing the cam column with different lifting amounts for different groove sections, the maximum tilt angle of the laser cutting machine can be changed. The entire process requires no recalibration or programming of any electrical parameters; only mechanical replacement of the cam column and adjustment of the first hydraulic push rod and linear module are needed to complete the changeover. What previously required hours of debugging by a professional electrical engineer can now be completed in minutes by an ordinary operator. Furthermore, the open-loop drive combined with a belt to rotate the pipe avoids frequent adjustments caused by vibration feedback in the closed-loop system during cutting, while also reducing the roughness of the cut surface, achieving a combination of low cost and high efficiency. Moreover, this invention significantly reduces component procurement costs and maintenance difficulty, making it particularly suitable for small and medium-sized enterprises lacking highly skilled electrical engineers, facilitating multi-batch and large-scale drainage pipe beveling operations.

[0018] 3. This invention features multiple radial adjustment slots on the side of the clamping platform. Moving the adjustment block and tightening the loosening bolts allows for quick changes in the clamping diameter, eliminating the need for tools. The pipe support on the frame uses a V-shaped groove containing rotatable ball bearings, and its bottom is supported by a long bolt and spring, providing elastic support that adapts to the slight bending of the pipe due to its own weight, avoiding jamming caused by rigid alignment. After cutting, a stepper motor drives the push plate to rotate to the working position, and the slider moves along the slide rail to achieve fixed-length pushing. Simultaneously, waste material automatically falls into the transport vehicle through the second opening and conveyor cylinder. This combined structure ensures that the pipe end positioning error during continuous cutting is less than that of traditional rigid clamping, and the automatic waste collection avoids the downtime required for manual cleaning. Furthermore, a single unit can replace four processes: clamping, cutting, pushing, and cleaning, significantly improving work efficiency. It achieves a balance between low cost and high efficiency while ensuring processing quality, thus possessing very broad application prospects. Attached Figure Description

[0019] To more clearly illustrate the technical solution of the present invention, the drawings used in the description will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. Figure 1 This is a schematic diagram of the overall device structure of the present invention. Figure 1 ; Figure 2 This is a schematic diagram of the overall device structure of the present invention. Figure 2 ; Figure 3 This is a schematic diagram of the drainage pipe arrangement structure of the present invention; Figure 4 This is a schematic diagram of the belt strip installation structure of the present invention; Figure 5 This is a schematic diagram of the clamping block mounting structure of the present invention; Figure 6 This is a schematic diagram of the swing arm beam installation structure of the present invention; Figure 7 This is a schematic diagram of the housing installation structure of the present invention; Figure 8 This is a schematic diagram of the internal structure of the housing of the present invention; Figure 9 This is a schematic diagram of the mounting structure of the rocker arm and cam column of the present invention; Figure 10 This is a schematic diagram of the arrangement structure of the curved groove section and the flat groove section of the present invention; Figure 11 This is a schematic diagram of the arrangement structure of the spherical protrusions of the present invention; Figure 12 This is a schematic diagram of the second hydraulic push rod arrangement structure of the present invention; Figure 13 This is a schematic diagram of the first support tube seat installation structure of the present invention; Figure 14 This is a schematic diagram of the pusher plate arrangement structure of the present invention; In the diagram: 1. Platform, 2. First support seat, 3. Second support seat, 4. Turntable seat, 5. Clamping seat, 6. Drainage pipe, 7. Clamping block, 8. First shaft, 9. Swing arm beam, 10. Z-axis linear module, 11. Housing, 12. Swing arm, 13. Cam column, 14. Laser cutting machine, 15. Tapered roller bearing, 16. First suspension platform, 17. Gearbox, 18. First asynchronous motor, 19. First belt pulley, 20. Second belt pulley, 21. Belt strip, 22. Adjusting groove, 23. Adjusting block, 24. Tightening bolt, 25. First hydraulic push rod, 26. Sleeve block, 27. Outer probe plate, 28. Second asynchronous motor, 29. Third support seat, 30. Fourth support seat, 31. Second shaft. 32. Third shaft, 33. First opening, 34. Concave arc surface, 35. Curved groove, 3501. Curved groove section, 3502. Flat groove section, 36. Spherical protrusion, 37. Circular ring, 38. Second suspension platform, 39. First support tube seat, 40. Second support tube seat, 41. Third support tube seat, 42. V-shaped groove, 43. Ball bearing, 44. First horizontal plate, 45. Second horizontal plate, 46. Long rod bolt, 47. Spring, 48. Slide rail, 49. Slider, 50. Third horizontal plate, 51. Vertical plate, 52. Stepper motor, 53. Push plate, 54. Right angle seat, 55. Second hydraulic push rod, 56. Rotary wheel, 57. Second opening, 58. Baffle, 59. Conveying cylinder, 60. Transport vehicle, 61. Third opening. Detailed Implementation

[0020] To make the objectives, features, and advantages of this invention more apparent and understandable, the technical solutions of this invention will be clearly and completely described below with reference to the accompanying drawings of the specific embodiments. Obviously, the embodiments described below are only some embodiments of this invention, and not all embodiments. Based on the embodiments of this invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this invention.

[0021] This specific embodiment provides a beveling and angled cutting device for drainage pipes, such as... Figures 1-14As shown, the device includes a platform 1 serving as the mounting base. The platform 1 is typically constructed of welded steel components to ensure the rigidity and stability of the overall structure. A first support 2 and a second support 3 are fixedly mounted on the platform 1, and these two supports are fastened to the platform 1 by bolts. A turntable 4 is rotatably mounted within the first support 2 via a tapered roller bearing 15. This tapered roller bearing 15 can simultaneously withstand large radial and axial loads, ensuring the smoothness of the turntable 4 when carrying the drainage pipe 6. A clamping platform 5 is fixedly mounted on the side of the turntable 4, and the clamping platform 5 is rigidly connected to the turntable 4 via a flange to ensure synchronous rotation. The side of the clamping platform 5 is provided with multiple clamping blocks 7 for clamping the drainage pipe 6. Rubber pads may be provided on the inner side of the clamping blocks 7 to increase friction and prevent damage to the pipe wall. The drainage pipe 6 can pass through the central through-holes of the turntable 4 and the clamping platform 5 in a linear X-axis direction, allowing the drainage pipe 6 to be arranged linearly along the X-axis in this device.

[0022] To accommodate drainage pipes 6 of different diameters, this invention designs an adjustable clamping mechanism, making it widely applicable. The side of the clamping base 5 has multiple radially distributed adjustment grooves 22, evenly arranged, for example, six adjustment grooves 22 radially distributed at a 60-degree angle. Each adjustment groove 22 is equipped with a slidingly fitted adjustment block 23, which can slide freely within the groove but cannot disengage. A tightening bolt 24 is installed between the adjustment block 23 and the clamping block 7, passing through a hole in the clamping block 7 and screwing into a threaded hole in the adjustment block 23. By loosening the tightening bolt 24, the adjustment block 23 can be moved along the adjustment groove 22, thereby changing the diameter of the clamping circle formed by the six clamping blocks 7 to accommodate drainage pipes 6 of different diameters. After adjustment, tightening the tightening bolt 24 utilizes the friction between the clamping block 7 and the end face of the clamping base 5 to securely clamp the drainage pipe 6. This structure is simple and reliable, and can be quickly adjusted without any tools.

[0023] A tapered roller bearing 15 is provided between the first support base 2 and the turntable base 4, as described above, to bear the combined load. A first suspension platform 16 is fixedly installed on the side of the frame 1. The first suspension platform 16 extends from the side of the frame 1 through an angle steel to provide a mounting surface for the drive components. A gearbox 17 is fixedly installed on the first suspension platform 16. The gearbox 17 can be a worm gear reducer, which converts the high speed and low torque of the first asynchronous motor 18 into a low speed and high torque output. The first asynchronous motor 18, which is driven by the gearbox 17, is fixedly installed on the side of the gearbox 17. A first pulley 19 is fastened to the output shaft of the gearbox 17. A second pulley 20 is fastened to the end of the turntable base 4 away from the clamping base 5. A belt 21 for synchronous linkage is installed between the first pulley 19 and the second pulley 20 to prevent slippage and ensure a precise transmission ratio. The first asynchronous motor 18 is started, and its power is reduced and increased in torque by the gearbox 17. Then, it is transmitted to the turntable 4 through the first pulley 19, the belt 21, and the second pulley 20, thereby driving the clamping platform 5 and the clamped drainage pipe 6 to rotate at a uniform speed. This facilitates the subsequent continuous and uniform circumferential cutting of the pipe wall by the laser cutting machine 14. This open-loop mechanical transmission method is low in cost and is perfectly suitable for bevel cutting, which does not require high-precision angular positioning.

[0024] A first hydraulic push rod 25 is hinged inside the frame 1. The cylinder end of the first hydraulic push rod 25 is hinged to an ear seat inside the frame 1 via a pin. A first shaft 8, which rotates linearly along the X-axis, is provided above the second support 3. The first shaft 8 is mounted on the top of the second support 3 via bearings, allowing it to rotate freely. The swing arm beam 9 is arranged along the Y-axis, with the first shaft 8 positioned below it. A sleeve block 26 is fixedly fitted around the first shaft 8, and the sleeve block 26 is connected to the first shaft 8 via a key. The sleeve block 26 is fastened to the bottom center of the swing arm beam 9 with multiple high-strength bolts, ensuring that the swing arm beam 9 rotates synchronously with the first shaft 8. An outer probe plate 27, which is a steel plate extending outward, is fixedly installed on the bottom side of the swing arm beam 9 away from the drain pipe 6. The piston rod end of the first hydraulic push rod 25 is hinged to the outer probe plate 27 via a pin. When the piston rod of the first hydraulic push rod 25 extends, it will push the outer probe plate 27 to move outward. Since the middle section of the swing arm beam 9 is supported by the first shaft 8, it will drive the swing arm beam 9 to rotate in the forward direction, so that the end of the swing arm beam 9 near the drain pipe 6 is closer to the drain pipe 6. Conversely, when the piston rod retracts, it will cause the swing arm beam 9 to rotate in the reverse direction, so that the end of the swing arm beam 9 near the drain pipe 6 is away from the drain pipe 6.

[0025] A Z-axis linear module 10 is fixedly installed on the side of the swing arm beam 9 near the drainage pipe 6. This Z-axis linear module 10 can be a ball screw type linear module, and its sliding end can move precisely along the vertical direction of the Z-axis. A housing 11 is fixedly installed on the sliding end of the Z-axis linear module 10. The housing 11 is a closed shell used to protect the internal precision components, and under the drive of the Z-axis linear module 10, the distance between the housing 11 and the drainage pipe 6 can be adjusted.

[0026] A second asynchronous motor 28 is fixedly installed on the side of the housing 11. The second asynchronous motor 28 is a common small asynchronous motor, and its output shaft is connected to the second shaft 31 via a coupling. A third support 29 and a fourth support 30 are fixedly installed inside the housing 11. Both are metal components with bearing seats. A second shaft 31 arranged along the X-axis is rotatably installed in the third support 29 via bearings. The second shaft 31 is drively connected to the output shaft of the second asynchronous motor 28. The cam column 13 is fastened to the periphery of the second shaft 31 and rotates synchronously with the second shaft 31. A third shaft 32 arranged along the Y-axis is rotatably installed in the fourth support 30 via bearings. A swing arm 12 is fastened to the periphery of the third shaft 32. The middle part of the swing arm 12 is fastened to the third shaft 32, so that the swing arm 12 can swing freely around the third shaft 32. The bottom of the housing 11 is provided with a first opening 33 for the swing arm 12 to pass through. The opening is rectangular to provide clearance when the swing arm 12 swings.

[0027] The outer peripheral wall of the cam column 13 is provided with a concave arc surface 34, which is used to accommodate the top end of the rocker arm 12. A curved groove 35 is formed on the concave arc surface 34, which is a closed arc structure, i.e., it surrounds the cam column 13. A spherical protrusion 36 is provided at the top end of the rocker arm 12. The spherical protrusion 36 can be a hemispherical wear-resistant part embedded in the top end of the rocker arm 12. The spherical protrusion 36 is arranged inside the curved groove 35 and slides in contact with the inner wall of the curved groove 35. Two annular portions 37 are provided at the bottom end of the rocker arm 12 and are fastened to the housing of the laser cutting machine 14 by bolts.

[0028] To achieve a series of actions—swinging, holding, and reversing—of the swing arm 12 to meet the requirement of maintaining the maximum angle during beveling, the curved groove 35 includes a curved groove section 3501 and a flat groove section 3502. Each of the curved groove section 3501 and the flat groove section 3502 has two segments, and the curved groove section 3501 and the flat groove section 3502 are arranged alternately. The two flat groove sections 3502 are located at both ends of the cam column 13 and are connected to the two curved groove sections 3501, forming a smooth closed curve; and the two flat groove sections 3502 are arranged along the YZ plane. When the second asynchronous motor 28 drives the cam column 13 to rotate, the ball joint 36 first slides within the curved groove section 3501. Since the bottom radius of the curved groove section 3501 gradually increases from the middle to the end of the cam column 13, this radial change pushes the swing arm 12 to gradually rotate around the third shaft 32 along the Y-axis via the ball joint 36, thereby continuously changing the tilt angle of the laser cutting machine 14 nozzle. When the ball joint 36 slides into the flat groove section 3502, since the bottom radius of the flat groove section 3502 is at the end of the cam column 13 and remains constant within the rotation angle range, the swing arm 12 will be in an intermittently stopped state. At this time, the nozzle of the laser cutting machine 14 remains at a maximum tilt angle. The operator can control the start and stop of the second asynchronous motor 28 to precisely stop the ball joint 36 at any position within the flat groove section 3502, thus locking the tilt angle of the laser cutting machine 14. Because it is mechanically self-locking, it eliminates the angle error that may be caused by gear backlash. When it is necessary to cut a symmetrical bevel at the other end of the pipe, the second asynchronous motor 28 is restarted. The spherical protrusion 36 will leave the current flat groove section 3502, pass through a connecting arc, and enter another curved groove section 3501. The radius change direction of this curved groove section 3501 is opposite to that of the first section, thus driving the swing arm 12 to swing in the opposite direction until it enters the flat groove section 3502 at the other end. At this time, the laser cutting machine 14 reaches the maximum tilt angle in the opposite direction, thereby achieving precise cutting of the symmetrical bevel. If it is necessary to cut bevels of different angles, only the cam column 13 with different lifting amounts of the curved groove section 3501 needs to be replaced. No electrical parameter adjustments are required, which greatly facilitates mass production.

[0029] To provide stable support for the long drainage pipe 6 during the cutting process and to accommodate minor bending caused by its own weight or manufacturing errors, this invention designs an elastic adaptive support structure. Please refer to... Figure 3 and Figure 13A second suspension platform 38 is fixedly installed on the side of the platform 1 to support the portion of the pipe extending out of the platform 1. A first pipe support seat 39 and a second pipe support seat 40 are provided on the platform 1, and a third pipe support seat 41 is provided on the second suspension platform 38. The first pipe support seat 39, the second pipe support seat 40, and the third pipe support seat 41 are all provided with V-shaped grooves 42, which have self-aligning capabilities. Multiple symmetrically arranged and rotatable ball bearings 43 are provided within the V-shaped grooves 42. These ball bearings 43 slide in contact with the outer wall of the drainage pipe 6, supporting the pipe and converting sliding friction into rolling friction, thus reducing resistance.

[0030] The bottom ends of the first support tube seat 39, the second support tube seat 40, and the third support tube seat 41 are all fixedly connected to a first horizontal plate 44. A second horizontal plate 45 is provided below the first horizontal plate 44. The second horizontal plate 45 at the bottom of the first support tube seat 39 and the second support tube seat 40 is fixedly mounted on the platform 1, and the second horizontal plate 45 at the bottom of the third support tube seat 41 is fixedly mounted on the second suspension platform 38. A long bolt 46 is provided between the first horizontal plate 44 and the second horizontal plate 45 for fastening. The long bolt 46 passes through the open hole on the first horizontal plate 44 and is screwed into the threaded hole of the second horizontal plate 45. A spring 47 is sleeved around the long bolt 46, and the two ends of the spring 47 are fastened to the first horizontal plate 44 and the second horizontal plate 45 respectively. By adjusting the installation depth of the long bolt 46, the drainage pipe 6 placed on the first support pipe seat 39, the second support pipe seat 40, and the third support pipe seat 41 can pass through the central through hole of the turntable seat 4 and the clamping seat 5, ensuring that the center line of the drainage pipe 6 is always roughly aligned with the center line of the clamping seat 5, and avoiding excessive bending stress on the pipe or displacement of the cutting position due to forced alignment.

[0031] To facilitate automatic pipe pushing after cutting and achieve continuous assembly line operation, this invention designs a stepping pushing mechanism. A slide rail 48, arranged along the X-axis, is fixedly installed on the frame 1. The slide rail 48 is a linear guide rail. A slider 49 is slidably installed on the slide rail 48. The slider 49 can be an electromagnetic slider structure, forming a precise linear motion pair with the slide rail 48. A third horizontal plate 50 is fastened to the top of the slider 49. A vertical plate 51 is fixedly installed on the top of the third horizontal plate 50, perpendicular to the third horizontal plate 50. A stepper motor 52 and a push plate 53 are respectively arranged on both sides of the vertical plate 51. The housing of the stepper motor 52 is fixed to the vertical plate 51, and its output shaft passes through the vertical plate 51 and is fastened to the push plate 53. The push plate 53 is a square plate. In the initial state, the push plate 53 is in the retracted position and does not interfere with pipe clamping. After cutting, release the clamp 7 and start the stepper motor 52 to rotate the push plate 53 by 45 degrees so that its front faces the end of the drain pipe 6. The slider 49 moves along the slide rail 48, and the push plate 53 can contact and push the end of the drain pipe 6, causing it to move forward a set distance in the X-axis direction.

[0032] Meanwhile, to prevent radial runout of the pipe due to high-speed rotation or lateral force from the laser cutting head during the cutting process, which would affect the cutting quality, a right-angle seat 54 is fixedly installed on the frame 1. A second hydraulic push rod 55, arranged obliquely, is fixedly installed inside the right-angle seat 54. A rotating wheel 56 is rotatably mounted on the piston rod end of the second hydraulic push rod 55 via a bearing. The rotating wheel 56 is made of polyurethane or nylon to prevent scratching the pipe. The rotating wheel 56 rotates in conjunction with the outer wall of the drainage pipe 6. Before cutting begins, the second hydraulic push rod 55 extends, causing the rotating wheel 56 to press against the outer wall of the drainage pipe 6 from the side and above with a certain pressure, providing a radial clamping force. This effectively suppresses pipe vibration during the cutting process and ensures the smoothness of the bevel surface.

[0033] To achieve automatic collection of cutting waste and improve the cleanliness of the production site, a second opening 57 is provided on the frame 1, located directly below the cutting station. A baffle 58, securely connected to the frame 1, is installed around the upper perimeter of the second opening 57. The height of the baffle 58 is lower than the top height of the second support base 3; the baffle 58 is a double-sided enclosure structure used to guide the cut waste to accurately fall into the second opening 57. A conveyor cylinder 59, an inclined cylindrical channel, is fixedly installed below the second opening 57 via a flange connection and securely connected to the frame 1. The frame 1 contains a transport vehicle 60, which has casters at the bottom and an open hopper at the top. The bottom outlet of the conveyor cylinder 59 is located above the transport vehicle 60, and a third opening 61 is provided on the side of the frame 1 to facilitate the entry and exit of the transport vehicle 60. The cut-off pipe end waste is separated from the main pipe by the pusher plate 53 and falls to the second opening 57. It then slides down through the conveyor cylinder 59 or falls freely into the hopper of the transport vehicle 60. When the transport vehicle 60 is full, it can be unloaded through the third opening 61 by pulling out the platform 1, which facilitates centralized cleaning and recycling and improves production efficiency.

[0034] The working principle of this invention is as follows: The drainage pipe 6 passes through the clamping base 5 and rests on the balls 43 in the V-shaped grooves 42 of the first support pipe seat 39, the second support pipe seat 40, and the third support pipe seat 41. Depending on the pipe's outer diameter, by installing the adjusting block 23 into the adjusting groove 22, the six clamping blocks 7 can stably clamp the drainage pipe 6 in the clamping base 5, thus positioning the end of the drainage pipe 6 to be beveled at the bottom of the laser cutting machine 14. By controlling the piston rod extension stroke of the first hydraulic push rod 25, the rotating arm beam 9 rotates under the support of the first shaft 8, thereby aligning the nozzle head of the laser cutting machine 14 downwards along the Z-axis. Through the adjustment of the Z-axis linear module 10, the nozzle head of the laser cutting machine 14 gradually approaches the drainage pipe 6; simultaneously, the second hydraulic push rod 55 is activated, extending its piston rod and driving the rotating wheel 56 to press against the outer wall of the pipe from the side.

[0035] The second asynchronous motor 28 can drive the cam column 13 to rotate. Before the cam column 13 rotates, the ball protrusion 36 at the top of the rocker arm 12 is arranged in one of the curved groove sections 3501, and the ball protrusion 36 is arranged in the middle of the curved groove section 3501. When the cam column 13 rotates, the ball protrusion 36 slides in the curved groove section 3501; at this time, the rocker arm 12 will swing under the support of the third shaft 32, thereby adjusting the tilt angle of the nozzle head of the laser cutting machine 14. When the ball protrusion 36 enters one of the flat groove sections 3502, the tilt angle of the laser cutting machine 14 nozzle head reaches its maximum because the flat groove section 3502 is located at the end of the cam column 13. And because the flat groove section 3502 is arranged in a YZ plane, the laser cutting machine 14 nozzle head can maintain the maximum tilt angle when the ball protrusion 36 slides in the flat groove section 3502. At this time, the operator can cut off the electric drive force of the second asynchronous motor 28 so that the ball protrusion 36 is arranged in the flat groove section 3502. This process can eliminate the error of the swing angle and ensure the accuracy of the bevel angle cutting operation of the drainage pipe 6.

[0036] The Z-axis linear module 10 drives the nozzle of the laser cutting machine 14 to approach the drainage pipe 6 and starts the first asynchronous motor 18, causing the clamping platform 5 to drive the drainage pipe 6 to rotate continuously, thereby cutting the bevel angle of the drainage pipe 6. After the cutting operation is completed, the operator can release the clamping block 7 from the drainage pipe 6; by driving the stepper motor 52, the push plate 53 is arranged on the outside of the end of the drainage pipe 6, and the slider 49 drives the third horizontal plate 50 to slide linearly along the X-axis, causing the push plate 53 to push the drainage pipe 6 to move along the X-axis. The end residue of the drainage pipe 6 after the cutting operation can enter the conveying cylinder 59 through the second port 57, and finally slide into the hopper of the transport vehicle 60 for collection.

[0037] If it is necessary to perform beveling and angled cutting on both ends of the drainage pipe 6, the other end of the uncut drainage pipe 6 can be rearranged at the bottom of the nozzle head of the laser cutting machine 14. Continue to start the second asynchronous motor 28, causing the spherical protrusion 36 to slide further into another curved groove section 3501, thereby driving the nozzle head of the laser cutting machine 14 to rotate in the opposite direction, thus achieving reciprocating oscillation of the nozzle head until the spherical protrusion 36 slides into another flat groove section 3502, at which point the nozzle head of the laser cutting machine 14 reaches its maximum tilt angle in the opposite direction, thereby cutting out a symmetrically arranged double-end beveling angled drainage pipe 6. After both ends have been cut, the operator can remove the transport vehicle 60 from the third opening 61 onto the platform 1, facilitating the secondary use of the remaining material from the drainage pipe 6.

[0038] Furthermore, if it is necessary to mass-produce drainage pipes 6 with different bevel angles, the cam column 13 can be replaced; by designing curved groove sections 3501 of different lengths, the tilt angle of the swing arm 12 can be limited. The entire process is quick, requires no recalibration or programming of any electrical parameters, greatly reduces equipment costs and operational barriers, and is very suitable for large-volume, multi-variety drainage pipe beveling operations.

[0039] The above description of the disclosed embodiments enables those skilled in the art to make or use the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A beveling and angle cutting device for drainage pipes, comprising a frame (1), characterized in that, A first support base (2) and a second support base (3) are fixedly installed on the frame (1). A turntable base (4) is rotatably installed inside the first support base (2). A clamping base (5) is fixedly installed on the side of the turntable base (4). A plurality of clamping blocks (7) for clamping the drainage pipe (6) are provided on the side of the clamping base (5). The drainage pipe (6) can pass through the turntable base (4) and the clamping base (5) in a linear direction along the X-axis. A first shaft (8) that rotates in a linear direction along the X-axis is provided above the second support base (3). A rotating arm beam (9) is fixedly installed on the first shaft (8). The rotating arm beam (9) is close to the drainage pipe (6). A Z-axis linear module (10) is fixedly installed on one side. A housing (11) is fixedly installed on the sliding end of the Z-axis linear module (10). A swing arm (12) is provided inside the housing (11). A cam column (13) rotating along the X-axis is provided above the swing arm (12). The top end of the swing arm (12) is in transmission cooperation with the cam column (13). The cam column (13) is used to drive the swing arm (12) to reciprocate intermittently rotate along the Y-axis. The bottom end of the swing arm (12) passes through the housing (11) and is fixedly connected to a laser cutting machine (14). The nozzle head of the laser cutting machine (14) is arranged above the drainage pipe (6).

2. The beveling and angle cutting device for drainage pipes according to claim 1, characterized in that, A tapered roller bearing (15) is provided between the first support base (2) and the turntable base (4). A first suspension platform (16) is fixedly installed on the side of the frame (1). A gearbox (17) is fixedly installed on the first suspension platform (16). A first asynchronous motor (18) that drives the gearbox (17) is fixedly installed on the side of the gearbox (17). A first belt wheel (19) is fastened on the output shaft of the gearbox (17). A second belt wheel (20) is fastened on the end of the turntable base (4) away from the clamping base (5). A belt (21) for synchronous linkage is installed between the first belt wheel (19) and the second belt wheel (20).

3. The beveling and angle cutting device for drainage pipes according to claim 1, characterized in that, The side of the clamping base (5) has multiple radially distributed adjustment grooves (22), which are evenly arranged. Each adjustment groove (22) is provided with a sliding adjustment block (23), and a tightening bolt (24) is installed between the adjustment block (23) and the clamping block (7).

4. The beveling and angle cutting device for drainage pipes according to claim 1, characterized in that, The frame (1) is hinged with a first hydraulic push rod (25). The swing arm beam (9) is arranged along the Y-axis. The first shaft (8) is arranged below the swing arm beam (9). A sleeve block (26) is fixedly fitted around the first shaft block (8). The sleeve block (26) is fastened to the middle of the bottom end of the swing arm beam (9). An outer probe plate (27) is fixedly installed on the bottom side of the swing arm beam (9) away from the drainage pipe (6). The piston rod end of the first hydraulic push rod (25) is hinged to the outer probe plate (27).

5. The beveling and angle cutting device for drainage pipes according to claim 1, characterized in that, A second asynchronous motor (28) is fixedly installed on the side of the housing (11). A third support seat (29) and a fourth support seat (30) are fixedly installed inside the housing (11). A second shaft (31) arranged along the X-axis is rotatably installed inside the third support seat (29). The second shaft (31) is connected to the output shaft of the second asynchronous motor (28). The cam column (13) is fastened to the periphery of the second shaft (31). A third shaft (32) arranged along the Y-axis is rotatably installed inside the fourth support seat (30). The middle part of the swing arm (12) is fastened to the third shaft (32). A first opening (33) is provided at the bottom of the housing (11) to facilitate the passage of the swing arm (12).

6. The beveling and angle cutting device for drainage pipes according to claim 1, characterized in that, The outer peripheral wall of the cam column (13) is provided with a concave arc surface (34), and a curved groove (35) is provided on the concave arc surface (34). The curved groove (35) is a closed arc structure. The top end of the swing arm (12) is provided with a ball protrusion (36). The ball protrusion (36) is arranged inside the curved groove (35) and slides in cooperation with the inner wall of the curved groove (35). The bottom end of the swing arm (12) is provided with a ring part (37) that is fastened to the outer shell of the laser cutting machine (14). For each rotation of the cam column (13), the ball protrusion (36) slides one revolution in the curved groove (35), and the swing arm (12) reciprocates once along the Y-axis direction.

7. The beveling angle cutting device for drainage pipes according to claim 6, characterized in that, The curved groove (35) includes a curved groove section (3501) and a flat groove section (3502). Each of the curved groove section (3501) and the flat groove section (3502) has two sections, and the curved groove section (3501) and the flat groove section (3502) are arranged at intervals. The two flat groove sections (3502) are arranged at both ends of the cam column (13) and are connected to the two curved groove sections (3501). When the ball protrusion (36) slides in the curved groove section (3501), the rocker arm (12) rotates along the Y-axis. When the ball protrusion (36) slides in the flat groove section (3502), the rocker arm (12) is in an intermittent stop state.

8. The beveling and angle cutting device for drainage pipes according to claim 1, characterized in that, A second suspension platform (38) is fixedly installed on the side of the platform (1). A first support pipe seat (39) and a second support pipe seat (40) are provided on the platform (1). A third support pipe seat (41) is provided on the second suspension platform (38). The first support pipe seat (39), the second support pipe seat (40), and the third support pipe seat (41) are all provided with V-shaped grooves (42). Two symmetrically arranged and rotatable ball bearings (43) are provided in the V-shaped grooves (42). The ball bearings (43) are in contact with the outer wall of the drainage pipe (6). Sliding fit; the bottom ends of the first support tube seat (39), the second support tube seat (40) and the third support tube seat (41) are all fixedly connected to the first horizontal plate (44), and the second horizontal plate (45) is provided below the first horizontal plate (44). A long rod bolt (46) is provided between the first horizontal plate (44) and the second horizontal plate (45) for fastening. A spring (47) is provided around the long rod bolt (46), and the two ends of the spring (47) are fastened to the first horizontal plate (44) and the second horizontal plate (45) respectively.

9. The beveling and angle cutting device for drainage pipes according to claim 1, characterized in that, A slide rail (48) arranged along the X-axis is fixedly installed on the frame (1). A slider (49) is slidably installed on the slide rail (48). A third horizontal plate (50) is fastened to the top of the slider (49). A vertical plate (51) is fixedly installed on the top of the third horizontal plate (50). A stepper motor (52) and a push plate (53) are respectively arranged on both sides of the vertical plate (51). The output shaft of the stepper motor (52) is fastened to the push plate (53). The push plate (53) is in contact with the end of the drainage pipe (6). A right-angle seat (54) is fixedly installed on the frame (1). A second hydraulic push rod (55) arranged obliquely is fixedly installed inside the right-angle seat (54). A rotating wheel (56) is rotatably installed on the piston rod end of the second hydraulic push rod (55). The rotating wheel (56) is rotatably engaged with the outer wall of the drainage pipe (6).

10. A beveling and angled cutting device for drainage pipes according to claim 9, characterized in that, The platform (1) is provided with a second opening (57). A baffle (58) is provided above the second opening (57) and is fastened to the platform (1). A conveying cylinder (59) is fixedly installed below the second opening (57) and is fastened to the platform (1). A transport vehicle (60) is provided inside the platform (1). The bottom outlet of the conveying cylinder (59) is located above the transport vehicle (60). A third opening (61) is provided on the side of the platform (1) to facilitate the entry and exit of the transport vehicle (60).

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