Special lathe for automatically and continuously cutting pipeline bell and spigot

Abstract

The invention discloses a special lathe for automatically and continuously cutting a pipeline bell and spigot, and relates to the technical field of pipeline machining, the special lathe comprises a fixed seat, two cutting mechanisms are symmetrically arranged on the fixed seat, each cutting mechanism comprises a sliding seat, the sliding seat is in sliding connection with the fixed seat, a motor is fixedly arranged on the sliding seat, and the output end of the motor is coaxially and fixedly connected with a rotating pipe; a plurality of air inlets are evenly formed in the circumferential outer wall of the rotating pipe, an air bag is fixedly arranged on the outer wall of the rotating pipe and is of an annular structure, a plurality of protruding blocks are evenly and fixedly arranged on the outer wall of the air bag, a fixing ring is coaxially and rotationally connected to the side, close to the motor, of the rotating pipe, an air cavity is formed in the side, close to the rotating pipe, of the fixing ring, and an air conveying pipe penetrates through the side wall of the air cavity. The bottom face of the air pump is fixedly connected with the side wall of the sliding seat through a fixing plate, and the fixing ring is fixedly connected with the fixing plate. The air bag inner support is adopted for fixing the pipeline in a self-adaptive mode, cutting vibration can be effectively restrained, and the machining precision and efficiency are improved.

Description

Technical Field

[0001] This invention relates to the field of pipe processing technology, and in particular to a special lathe for automatic continuous cutting of pipe sockets. Background Technology

[0002] Pipelines are devices used to transport gases, liquids, or fluids containing solid particles. With the advancement of urbanization, the uses of pipelines have become increasingly widespread. They are mainly used in water supply, drainage, heating, gas supply, long-distance transportation of oil and natural gas, agricultural irrigation, hydraulic engineering, and various industrial installations. In order to improve the ease of pipeline installation, in addition to manufacturing and processing the pipeline structure itself, the sockets or spigots at the ends of the pipeline also need to undergo secondary precision machining after the pipeline is produced. This is to facilitate the connection and installation by workers, and also to ensure the dimensional accuracy, roundness, and smoothness of the connection surfaces, thereby ensuring that multiple sections of pipeline can be reliably connected. Currently, the processing of pipeline sockets is often carried out by using a general-purpose lathe or simple tooling for fixing, and then the pipe ends are ground by external grinding equipment.

[0003] Existing cutting lathes typically use tension chucks to fix pipes. However, due to the inherent ellipticity and wall thickness tolerance of the pipes, the rigid or semi-rigid expansion flaps of the tension chuck make hard contact with the inner wall of the pipe. The vibration generated during cutting is directly transmitted to the machine tool spindle and cutting tool. This not only leads to uneven cutting at the socket joint, affecting subsequent pipe connection and installation, but also affects the grinding equipment in reverse through the pipe. Uneven contact causes inconsistent wear at the output end of the grinding equipment, reducing its service life. In view of this, we propose a special lathe for automatic continuous cutting of pipe socket joints. Summary of the Invention

[0004] The purpose of this invention is to solve the problem that the rigid clamping structure of the cutting lathe in the prior art is prone to unstable clamping and cutting vibration, which affects the processing quality and service life of the grinding equipment. Therefore, this invention proposes a special lathe for automatic continuous cutting of pipe sockets.

[0005] To achieve the above objectives, the present invention employs the following technology: a special lathe for automatic continuous cutting of pipe sockets: including a fixed base and a CNC device fixed on the fixed base; two cutting mechanisms are symmetrically arranged on the fixed base; a feeding mechanism, a material preparation mechanism, a lifting mechanism, and a discharging mechanism are arranged sequentially from front to back in the middle of the fixed base; the cutting mechanism includes a sliding base, which is slidably connected to the fixed base; a motor is fixed on the sliding base; a rotating tube is coaxially fixedly connected to the output end of the motor; multiple air inlets are evenly opened on the outer circumference of the rotating tube; an air bladder with an annular structure is fixed on the outer wall of the rotating tube; multiple protrusions are evenly fixed on the outer wall of the air bladder; a fixed ring is coaxially rotatably connected to the rotating tube near the motor; an air chamber is opened on the side of the fixed ring near the rotating tube; the air chamber is connected to the interior of the rotating tube; an air supply pipe is passed through the side wall of the air chamber; an air pump is connected to the end of the air supply pipe away from the fixed ring; the bottom surface of the air pump is fixedly connected to the side wall of the sliding base through a fixed plate; the fixed ring is fixedly connected to the fixed plate; a first scissor-type lifting platform is fixed on the top surface of the fixed plate; a grinding device is fixed on the first scissor-type lifting platform.

[0006] As a further description of the above technical solution: multiple air outlet pipes are provided through the side wall of the airbag near the fixing ring. The end of the air outlet pipe near the fixing ring is inclined to the side away from the fixing ring, and the inner diameter of the air outlet pipe is arranged in a structure that is narrow in the middle and wide at both ends.

[0007] As a further description of the above technical solution: the outer wall of the rotating tube has a symmetrical structure with two support rings fixed on it. The outer wall of the support ring is in contact with the inner wall of the airbag. The protrusion is set in a frustum structure. The internal cavity of the rotating tube has a ring structure. The axial section of the fixed ring has a T-shaped structure.

[0008] As a further description of the above technical solution: a cross slide is fixed on the top surface of the sliding seat, a limit rod is installed on the cross slide, the limit rod moves horizontally under the drive of the cross slide, multiple sliders are fixed on the bottom surface of the sliding seat, and a slide rail that slides and cooperates with the sliders is fixed on the fixed seat.

[0009] As a further description of the above technical solution: a ball screw is provided below the sliding seat, the ball screw is rotatably connected to the fixed seat, a screw sleeve is driven connected to the ball screw, the screw sleeve is connected and fixed to the top surface of the sliding seat, and a servo motor is coaxially fixedly connected to the end of the ball screw away from the sliding seat, and the servo motor is connected and fixed to the fixed seat.

[0010] As a further description of the above technical solution: the feeding mechanism includes a pallet, a shovel plate is fixedly provided at the end of the pallet away from the fixed seat, the pallet is set with an inclined structure that is lower in the front and higher in the back, the end of the pallet near the fixed seat is rotatably connected to the fixed seat, and a first hydraulic rod is rotatably connected between the bottom surface of the pallet and the top surface of the fixed seat.

[0011] As a further description of the above technical solution: the material preparation mechanism includes a fixed frame, which is connected and fixed to a fixed seat. A rotating plate is rotatably connected to the upper part of the fixed frame. The rotating plate has a V-shaped structure. A second hydraulic rod is rotatably connected between one end of the bottom surface of the rotating plate and the top surface of the fixed seat. Two guide plates are symmetrically arranged on both sides of the rotating plate. The guide plates are set with an inclined structure that is higher in the front and lower in the back. The guide plates are connected and fixed to the fixed seat.

[0012] As a further description of the above technical solution: the lifting mechanism includes a second scissor lift platform, the bottom fixed end of the second scissor lift platform is connected and fixed to the top surface of the fixed seat, and a limiting plate is fixed on the top surface of the second scissor lift platform. The limiting plate has a V-shaped structure, and the lowest point of the concave surface of the limiting plate corresponds to the position of the output end of the motor on both sides.

[0013] As a further description of the above technical solution: the discharge mechanism includes a support frame, which is located behind the second scissor lift platform and is fixedly connected to the fixed seat. A lever plate is rotatably connected to the support frame. The lever plate is arranged with an inclined structure that is lower in the front and higher in the back. The side of the lever plate near the second scissor lift platform has a U-shaped structure. Two extrusion blocks are symmetrically fixed on the top surface of the lever plate near the second scissor lift platform. A third hydraulic rod is rotatably connected between the bottom surface of the lever plate away from the second scissor lift platform and the support frame.

[0014] As a further description of the above technical solution: a bracket is provided at the rear of the support frame, the bracket is connected and fixed to the fixed seat, and a feeding plate is rotatably connected to the bracket. The top surface of the feeding plate is concave, and a fourth hydraulic rod is rotatably connected between the bottom surface of the feeding plate and the bracket. The feeding plate is driven by the fourth hydraulic rod, and its rotation angle range is 0 to 90 degrees.

[0015] In summary, the beneficial effects of this invention, which utilizes the aforementioned technology for automatic continuous cutting of pipe sockets, are as follows: The invention includes a rotating tube and an air bladder. When the rotating tube extends into the pipe, an air pump supplies air to the air chamber of the fixing ring. The gas enters the air bladder through the air inlet on the rotating tube wall, where it is first rapidly inflated, thus tightening the pipe from within. The flexible material of the air bladder adapts to pipes of different diameters and ellipticities, enabling rapid and flexible clamping without repeated adjustments or changes to the clamps. This effectively optimizes the pipe fixing process, improves the efficiency of pipe socket cutting, and ensures the stability of the pipe's rotation center by uniform expansion, eliminating imbalance caused by clamping eccentricity. Furthermore, the air bladder itself acts as a flexible damping body, absorbing grinding forces. The periodic vibrations caused by this ensure the stability of the cutting process. Furthermore, a large number of protrusions are uniformly fixed on the outer wall of the airbag. These protrusions enhance the friction between the airbag and the inner wall of the pipe, ensuring that the motor can smoothly drive the pipe to rotate during the cutting process. The frustum-shaped structure of the protrusions also reduces the contact area between the airbag and the inner wall of the pipe, which can more effectively buffer and disperse the impact force, further suppressing possible pipe chatter and enhancing the quality of the cutting process. In addition, the airbag is also equipped with multiple air outlets with an internal shape similar to a Venturi tube. With its inclined structure, the high-speed airflow continuously ejected from the inclined air outlets during the uniform air delivery process of the air pump can clean the chips on the inner wall of the pipe and also form an air cushion to help isolate the transmission of vibration. Attached Figure Description

[0016] Figure 1 An overall schematic diagram of the present invention is shown; Figure 2 A schematic diagram of the fixing base of the present invention is shown; Figure 3 A schematic diagram of the cutting mechanism of the present invention is shown; Figure 4 An exploded view of the motor output terminal structure of the present invention is shown; Figure 5 A schematic cross-sectional view of the fixing ring of the present invention is shown; Figure 6 A cross-sectional schematic diagram of the airbag of the present invention is shown; Figure 7 A cross-sectional schematic diagram of the air outlet pipe of the present invention is shown; Figure 8 A schematic diagram of the grinding equipment of the present invention is shown; Figure 9 A bottom view schematic diagram of the feeding mechanism of the present invention is shown; Figure 10 A schematic diagram of the material preparation mechanism of the present invention is shown; Figure 11 A schematic diagram showing the positional relationship between the lifting mechanism and the unloading mechanism of the present invention is shown; Figure 12 A bottom view of the feed tray of the present invention is shown.

[0017] Legend: 10. Fixed base; 11. CNC device; 12. Slide rail; 13. Ball screw; 131. Screw sleeve; 132. Servo motor; 20. Cutting mechanism; 21. Sliding seat; 211. Fixed plate; 212. First scissor lift platform; 213. Grinding equipment; 214. Cross slide; 215. Limiting rod; 216. Slider; 22. Motor; 23. Rotating tube; 231. Air inlet; 24. Airbag; 241. Protrusion; 242. Air outlet pipe; 243. Support ring; 25. Fixed ring; 251. Air chamber; 252. Air supply pipe; 253. Air pump; 30. Feeding mechanism; 31. Pallet; 32. Shovel; 33. First hydraulic rod; 40. Material preparation mechanism; 41. Fixing frame; 42. Turning plate; 43. Second hydraulic rod; 44. Guide plate; 50. Lifting mechanism; 51. Second scissor lift platform; 52. Limit plate; 60. Discharge mechanism; 61. Support frame; 62. Paddle plate; 621. Extrusion block; 63. Third hydraulic rod; 64. Bracket; 65. Discharge tray; 66. Fourth hydraulic rod. Detailed Implementation

[0018] The following will describe in detail, with reference to the accompanying drawings of the embodiments of the present invention, a special lathe for automatic continuous cutting of pipe sockets according to the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of them. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0019] like Figures 1-12 As shown, the present invention provides a special lathe for automatic continuous cutting of pipe sockets, including a fixed base 10, and a feeding mechanism 30, a material preparation mechanism 40, a lifting mechanism 50 and a discharging mechanism 60 arranged sequentially from front to back in the middle of the fixed base 10.

[0020] The feeding mechanism 30 includes a pallet 31. A shovel 32 is fixedly mounted on the end of the pallet 31 away from the fixed base 10. The pallet 31 is inclined with a lower front and a higher rear. The end of the pallet 31 near the fixed base 10 is rotatably connected to the fixed base 10. A vertical plate is provided on the fixed base 10 for rotatably connecting with the rear end of the pallet 31, ensuring that the height of the rear end of the pallet 31 corresponds to the inlet end of the material preparation mechanism 40. A first hydraulic rod 33 is rotatably connected between the bottom surface of the pallet 31 and the top surface of the fixed base 10. When feeding, the operator only needs to push the pipe onto the shovel 32, and then use the extension of the first hydraulic rod 33 to make the front end of the pallet 31 tilt upward. Then the pipe will automatically roll towards the material preparation mechanism 40 under gravity.

[0021] The material preparation mechanism 40 includes a fixed frame 41, which is fixedly connected to a fixed base 10. A rotating plate 42 is rotatably connected to the upper part of the fixed frame 41. The rotating plate 42 has a V-shaped structure, with an included angle of more than 120 degrees and less than 180 degrees on the top surface of the rotating plate 42. A second hydraulic rod 43 is rotatably connected between one end of the bottom surface of the rotating plate 42 and the top surface of the fixed base 10. Two guide plates 44 are symmetrically arranged on both sides of the rotating plate 42. The guide plates 44 have an inclined structure with the front higher than the back. The guide plates 44 are fixedly connected to the fixed base 10. The pipe rolls from the feeding mechanism 30 into the material preparation mechanism 40. After the pipe is inserted, it will roll along the guide plate 44 towards the fixed frame 41 under the action of gravity and the inclined guide plate 44. The outer lateral edge of the guide plate 44 is set with an L-shaped structure to prevent the pipe from sliding out from the side of the guide plate 44. When the pipe rolls onto the rotating plate 42, it will be centered under the guidance of the V-shaped structure of the rotating plate 42. When the second hydraulic rod 43 is not extended, the rear end of the rotating plate 42 is slightly higher than the front end. This is to adapt to the height of the guide plate 44, so as to facilitate the pipe rolling in, and also to limit the position of the pipe and prevent it from rolling off from the rear.

[0022] The lifting mechanism 50 includes a second scissor lift platform 51. The bottom fixed end of the second scissor lift platform 51 is connected and fixed to the top surface of the fixed base 10. A limiting plate 52 is fixedly provided on the top surface of the second scissor lift platform 51. The second scissor lift platform 51 can drive the limiting plate 52 to move up and down. The limiting plate 52 has a V-shaped structure, and the included angle of the top surface of the limiting plate 52 is also set to be greater than 120 degrees and less than 180 degrees. The heights of its front and rear ends are equal. When the limiting plate 52 is at the lowest point and there is no pipe to be cut on it, the operator can use the extension of the second hydraulic rod 43 to operate the rotating plate 42 to rotate. The front end of the rod 43 is rotatably connected to the front end of the bottom of the rotating plate 42. Therefore, the extended second hydraulic rod 43 will cause the rear end of the rotating plate 42 to drop, and then the rear part of the top surface of the rotating plate 42 will become a slope with the front higher than the rear. The front end of the top of the limit plate 52 at the lowest point is lower than the rear end of the top surface of the rotating plate 42 after rotation. Then, under the action of gravity, the pipe on the rotating plate 42 will roll to the top surface of the limit plate 52. Then, the operator can lift the limit plate 52 and the pipe together through the second scissor lift platform 51, so that the position of the pipe is adapted to the cutting mechanism 20, which facilitates the subsequent grinding of the pipe socket.

[0023] Two cutting mechanisms 20 are symmetrically arranged on the fixed base 10. The cutting mechanism 20 includes a sliding base 21, which is slidably connected to the fixed base 10. A motor 22 is fixed on the sliding base 21. The lowest point of the concave surface of the limiting plate 52 corresponds to the position of the output end of the motor 22 on both sides. Under the action of the V-shaped surface of the limiting plate 52, the pipe will stop on the limiting plate 52 with the lowest point of the concave surface of the limiting plate 52 as the center. Therefore, this position design is to ensure that the raised pipe can be coaxial with the output end of the motor 22.

[0024] A cross slide 214 is fixed on the top surface of the sliding seat 21. A limit rod 215 is installed on the cross slide 214. The limit rod 215 moves horizontally under the drive of the cross slide 214. This structure helps the operator to limit the pipe using the limit rod 215. The limit rod 215 will abut against the end face of the pipe under the drive of the cross slide 214, thereby preventing the pipe from axial displacement when receiving cutting processing.

[0025] Multiple sliders 216 are fixedly mounted on the bottom surface of the sliding seat 21, and a slide rail 12 that slides with the sliders 216 is fixedly mounted on the fixed seat 10, thereby realizing the sliding connection between the sliding seat 21 and the fixed seat 10. A ball screw 13 is provided below the sliding seat 21, and the ball screw 13 is rotatably connected to the fixed seat 10. A screw sleeve 131 is driven to the ball screw 13, and the screw sleeve 131 is fixedly connected to the top surface of the sliding seat 21. A servo motor 132 is coaxially fixedly connected to the end of the ball screw 13 away from the sliding seat 21. The servo motor 132 is fixedly connected to the fixed seat 10. By driving the ball screw 13 to rotate through the servo motor 132, the screw sleeve 131 can be translated along the outer wall of the ball screw 13, thereby driving the sliding seat 21 to translate, so that the cutting structure on the sliding seat 21 can adapt to pipes of different lengths.

[0026] The output end of the motor 22 is coaxially fixedly connected to the rotating tube 23. The internal cavity of the rotating tube 23 has a ring structure. After the height of the pipe rises to the height coaxial with the output end of the motor 22, the sliding seat 21 will also move towards the middle to adapt to the length of the pipe. The limiting rod 215 will fit against the end face of the pipe, and the rotating tube 23 and its structure will enter the inside of the pipe. It should be noted that there will be enough space between the opening end of the pipe and the rotating tube 23 for cutting processing.

[0027] Multiple air inlets 231 are evenly distributed on the outer circumference of the rotating tube 23, connecting the interior of the rotating tube 23 to the outside. The air inlets 231 are located in the middle of the outer circumference of the rotating tube 23. A fixing ring 25 is coaxially rotatably connected to the rotating tube 23 near the motor 22. An air chamber 251 is formed on the side of the fixing ring 25 near the rotating tube 23, and the air chamber 251 is connected to the interior of the rotating tube 23. An air supply pipe 252 is inserted through the side wall of the air chamber 251. An air pump 253 is connected to the end of the air supply pipe 252 away from the fixing ring 25, allowing the operator to supply air into the air chamber 251 using the air pump 253. The bottom surface of the air pump 253 is fixed to the side wall of the sliding seat 21 via a fixing plate 211. The fixing ring 25 is connected and fixed to the fixing plate 211. The upper and lower walls of the fixing ring 25 are both planar structures. The support rod used to fix the fixing ring 25 is divided into upper and lower parts. The part that contacts the fixing ring 25 is a semi-circular ring structure. The inner wall of the semi-circular ring structure is provided with a plane that fits with the planar position of the fixing ring 25. In this way, the fixing ring 25 can be fixed and ensured that the fixing ring 25 will not rotate with the rotating tube 23. The axial section of the fixing ring 25 is T-shaped. The inner wall of the rotating tube 23 is provided with an annular groove that rotates with the end of the fixing ring 25. This structure makes the rotational connection between the fixing ring 25 and the rotating tube 23 airtight, preventing the air blown into the air chamber 251 by the air pump 253 from leaking out from the joint.

[0028] An air bladder 24 is fixed to the outer wall of the rotating tube 23. The air bladder 24 has a ring structure. Two support rings 243 are fixed to the outer wall of the rotating tube 23 in a symmetrical structure. The outer wall of the support rings 243 is in contact with the inner wall of the air bladder 24, thereby supporting the air bladder 24 and preventing uneven contraction of the air bladder 24 from blocking the air inlet 231. The air bladder 24 and the outer wall of the rotating tube 23 form a ring-shaped space. The gas discharged from the air inlet 231 will enter this ring-shaped space. As the gas increases, the air bladder 24 will also inflate. The expansion of the air bladder 24 can support the tube. The air bladder 24 itself is made of flexible material, so after being supported, its outer wall can flexibly adapt to the structure of the inner wall of the tube. The flexible deformation allows the device to fix the pipe without being limited by the pipe diameter, pipe ellipticity, or pipe wall thickness tolerance. Compared with the gripper, the contact surface between the airbag 24 and the inner wall of the pipe is more uniform, avoiding the problem of pipe deformation caused by excessive pressure at a single point. Multiple protrusions 241 are uniformly fixed on the outer wall of the airbag 24. The protrusions 241 are arranged in a frustum structure. The protrusions 241 can not only increase the friction between the airbag 24 and the inner wall of the pipe, but also prevent the inner wall of the pipe from completely fitting against the outer wall of the airbag 24. This can more effectively buffer and disperse vibration during the cutting process, thereby reducing the impact of vibration on the cutting.

[0029] Multiple air outlet pipes 242 are provided through the side wall of the airbag 24 near the fixing ring 25. The gas entering the airbag 24 will be squeezed out from the air outlet pipes 242 by the elastic force of the outer wall of the airbag 24. The air pump 253 in this device first ensures that the airbag 24 can open and support the inner wall of the pipe by rapidly inflating it. In the subsequent cutting process, it supplies air to the inside of the airbag 24 by uniformly inflating it to ensure that the speed of air outlet is consistent with the speed of air inlet. This air supply method can make the support force of the airbag 24 more reliable. The support force of a single air supply will continuously decrease due to gas leakage as the pipe rotates with the motor 22. In addition, the state of the pipe is variable due to the cutting process and rotation. Continuous air supply also allows the airbag 24 to flexibly adapt to changes and provide more stable support and fixation. Continuous air supply is precisely to compensate for possible micro-leakage and actively control the stability of the clamping force.

[0030] The end of the exhaust pipe 242 near the fixed ring 25 is inclined away from the fixed ring 25. This way, the blown gas will be blown towards the edge of the pipe opening. When the inner wall of the pipe is cut, the powder and filamentous waste will be cleared out of the pipe by the airflow, preventing the powder and filamentous waste from accumulating inside the pipe and affecting subsequent cutting processes, thus ensuring cutting quality. The inner diameter of the exhaust pipe 242 is designed to be narrow in the middle and wide at both ends. This structure makes the air delivery channel inside the exhaust pipe 242 form a Venturi tube-like effect. Under the action of Bernoulli's principle, the gas flow rate blown out of the exhaust pipe 242 becomes faster and the impact force becomes stronger, which can more thoroughly blow away the waste on the inner wall of the pipe, preventing the waste from being trapped in the pipe or adhering to the inner wall of the pipe due to centrifugal force.

[0031] It is worth noting that the air pump 253 continuously supplies air, maintaining the preset pressure in real time. Even if the pipeline undergoes minor deformation or creep during cutting, the air bag 24 can automatically replenish the air pressure to ensure a constant clamping force. This is especially important during long-term cutting or large-mass cutting. Traditional tensioning chucks mostly use mechanical locking or hydraulic one-time pressurization. During the cutting process, due to vibration or plastic deformation of the pipeline, the clamping force may gradually decrease and cannot be compensated in real time.

[0032] A first scissor lift platform 212 is fixedly mounted on the top surface of the fixed plate 211. A grinding device 213 is fixedly mounted on the first scissor lift platform 212. The height of the grinding device 213 can be adjusted via the first scissor lift platform 212 to accommodate pipes of different diameters. The output axis of the grinding device 213 is parallel to the output axis of the motor 22, and the distance between the output end of the grinding device 213 and the rotating tube 23 is fixed. When the rotating tube 23 penetrates the pipe a fixed distance, the output end of the grinding device 213 naturally corresponds radially to the position of the cutting interface on the pipe. Therefore, it is only necessary to adjust the height of the grinding device 213 to achieve cutting processing of pipes of different diameters.

[0033] The discharge mechanism 60 includes a support frame 61, which is located behind the second scissor lift platform 51 and fixedly connected to the fixed base 10. A lever plate 62 is rotatably connected to the support frame 61. Before the pipe undergoes cutting processing, the lever plate 62 is set in an inclined structure with the front lower than the rear. After the pipe has undergone cutting processing, the lifting mechanism 50 will reset and lower the pipe to its original position. The side of the lever plate 62 closest to the second scissor lift platform 51 has a U-shaped structure, and the two ends of the lever plate 62 closest to the second scissor lift platform 51 are located on the lower sides of the pipe laterally. Two pressing blocks 621 are symmetrically fixed on the top surface of the deflector plate 62 near the second scissor lift platform 51. A third hydraulic rod 63 is rotatably connected between the bottom surface of the deflector plate 62 away from the second scissor lift platform 51 and the support frame 61. By controlling the extension of the third hydraulic rod 63, the operator can raise the end of the deflector plate 62 near the second scissor lift platform 51. The pressing blocks 621 prevent the pipe from sliding forward along the top surface of the deflector plate 62 until the deflector plate 62 forms a structure that is higher in the front and lower in the back. At this point, the pipe will roll backward along the tilt angle of the deflector plate 62.

[0034] A bracket 64 is provided behind the support frame 61. The bracket 64 is connected and fixed to the fixed base 10. A feeding tray 65 is rotatably connected to the bracket 64. The top surface of the feeding tray 65 is concave. The pipe rolling backward along the deflector plate 62 will roll into the concave surface of the feeding tray 65. The rear end of the top surface of the feeding tray 65 is L-shaped to prevent the pipe from rushing out of the feeding tray 65 from the rear. A fourth hydraulic rod 66 is rotatably connected between the bottom surface of the feeding tray 65 and the bracket 64. The feeding tray 65 is driven by the fourth hydraulic rod 66. Its rotation angle range is 0 to 90 degrees. The pipe can be output from the device with one end facing downward through the fourth hydraulic rod 66. On the side of the top surface of the feeding tray 65 that is driven downward by the fourth hydraulic rod 66, a baffle is provided at its lateral edge, which can be used to support the vertical pipe.

[0035] A CNC device 11 is fixed on the fixed base 10. The CNC device 11 is used to control the cutting mechanism 20, the feeding mechanism 30, the preparation mechanism 40, the lifting mechanism 50, and the discharge mechanism 60. In the whole process, the pipe to be processed is sent to the preparation mechanism 40 through the feeding mechanism 30. Then, the material is lifted to a suitable position by the lifting mechanism 50. The cutting mechanism 20 then cuts the pipe at the joint. Finally, the pipe is lowered back to the lifting mechanism 50 and the discharge mechanism 60 transports the pipe to the end of the device. The whole process is executed in sequence. The operator only needs to transport the material from the beginning and the end without human intervention.

[0036] Working principle: All mechanisms in this device are controlled by the CNC device 11, which can realize continuous operation. Before processing begins, the operator needs to push the pipe onto the shovel plate 32 of the feeding mechanism 30. The first hydraulic rod 33 pushes the front end of the pallet 31 to tilt up, so that the pipe rolls into the material preparation mechanism 40.

[0037] The pipes roll along the guide plate 44 to the V-shaped rotating plate 42. Multiple pipes can be arranged on the guide plate 44 to wait for processing. After the material preparation is completed, the second hydraulic rod 43 pushes the rear end of the rotating plate 42 to descend, and the pipes on the rotating plate 42 roll onto the V-shaped limiting plate 52 in the lifting mechanism 50.

[0038] Subsequently, the second scissor lift platform 51 raises the limiting plate 52 and the pipe to the set height, aligning the pipe axis with the output end of the motor 22 of the cutting mechanism 20 on both sides. Before cutting begins, the sliding seat 21 moves towards the middle of the pipe under the drive of the servo motor 132, causing the rotating tube 23 to extend into the end of the pipe. At the same time, the cross slide 214 drives the limiting rod 215 to move forward and abut against the end face of the pipe. Then, the air pump 253 starts and supplies air to the air chamber 251 of the fixing ring 25. The airflow enters the annular airbag 24 through the air inlet 231 of the rotating tube 23, causing it to expand and fit against the inner wall of the pipe. The flexibility of the airbag 24 can adapt to different pipe diameters and ellipticity, thus completing the fixation of the pipe.

[0039] The grinding equipment 213 is aligned with the cutting socket under the adjustment of the first scissor lift 212. Then, the motor 22 drives the pipe to rotate through the various structures at its output end, and the grinding equipment 213 cuts the pipe simultaneously.

[0040] During processing, the air pump 253 continuously supplies air, and some of the gas is ejected at high speed from the inclined air outlet pipe 242, blowing away the cutting chips.

[0041] The sliding seat 21 moves outward, the airbag 24 vents, and after the fixation is released, the second scissor lifting platform 51 drives the pipe to descend. After the pipe falls back, the third hydraulic rod 63 of the discharge mechanism 60 pushes the front end of the deflector plate 62 to lift, so that the pipe rolls into the discharge tray 65.

[0042] Finally, the fourth hydraulic rod 66 drives the feed plate 65 to flip laterally, so that the pipe is output vertically.

[0043] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the present invention's technology and inventive concept, should be covered within the scope of protection of the present invention.

Claims

1. A special lathe for automatic continuous cutting of pipe sockets, comprising a fixed base (10) and a CNC device (11) fixed on the fixed base (10), characterized in that, Two cutting mechanisms (20) are symmetrically arranged on the fixed base (10). The middle part of the fixed base (10) is provided with a feeding mechanism (30), a material preparation mechanism (40), a lifting mechanism (50) and a discharging mechanism (60) from front to back. The cutting mechanism (20) includes a sliding seat (21), which is slidably connected to a fixed seat (10). A motor (22) is fixedly mounted on the sliding seat (21). A rotating tube (23) is coaxially fixedly connected to the output end of the motor (22). Multiple air inlets (231) are evenly provided on the outer circumference of the rotating tube (23). An air bladder (24) is fixedly mounted on the outer wall of the rotating tube (23). The air bladder (24) has a ring structure. Multiple protrusions (241) are evenly fixedly mounted on the outer wall of the air bladder (24). The rotating tube (23) is close to the motor. A fixed ring (25) is coaxially rotatably connected to one side of the motor (22). An air chamber (251) is opened on the side of the fixed ring (25) near the rotating tube (23). The air chamber (251) is connected to the inside of the rotating tube (23). An air supply pipe (252) is provided through the side wall of the air chamber (251). An air pump (253) is connected to the end of the air supply pipe (252) away from the fixed ring (25). The bottom surface of the air pump (253) is connected and fixed to the side wall of the sliding seat (21) through a fixed plate (211). The fixed ring (25) is connected and fixed to the fixed plate (211). The top surface of the fixed plate (211) is fixed with a first scissor lift platform (212), and a grinding device (213) is fixed on the first scissor lift platform (212).

2. The special lathe for automatic continuous cutting of pipe sockets according to claim 1, characterized in that, The airbag (24) has multiple air outlet pipes (242) through the side wall near the fixing ring (25). The end of the air outlet pipe (242) near the fixing ring (25) is inclined to the side away from the fixing ring (25). The inner diameter of the air outlet pipe (242) is arranged in a structure that is narrow in the middle and wide at both ends.

3. A special lathe for automatic continuous cutting of pipe sockets according to claim 2, characterized in that, The outer circumference of the rotating tube (23) is symmetrically structured with two support rings (243). The outer wall of the support ring (243) is in contact with the inner wall of the airbag (24). The protrusion (241) is set in a frustum structure. The internal cavity of the rotating tube (23) is annular. The axial cross section of the fixed ring (25) is T-shaped.

4. A special lathe for automatic continuous cutting of pipe sockets according to claim 3, characterized in that, The top surface of the sliding seat (21) is fixed with a cross slide (214), and a limit rod (215) is installed on the cross slide (214). The limit rod (215) moves horizontally under the drive of the cross slide (214). The bottom surface of the sliding seat (21) is fixed with a plurality of sliders (216), and the fixed seat (10) is fixed with a slide rail (12) that slides with the sliders (216).

5. A special lathe for automatic continuous cutting of pipe sockets according to claim 4, characterized in that, A ball screw (13) is provided below the sliding seat (21). The ball screw (13) is rotatably connected to the fixed seat (10). A screw sleeve (131) is connected to the ball screw (13) for transmission. The screw sleeve (131) is connected and fixed to the top surface of the sliding seat (21). A servo motor (132) is coaxially fixed to the end of the ball screw (13) away from the sliding seat (21). The servo motor (132) is connected and fixed to the fixed seat (10).

6. A special lathe for automatic continuous cutting of pipe sockets according to claim 5, characterized in that, The feeding mechanism (30) includes a pallet (31), and a shovel plate (32) is fixedly provided at the end of the pallet (31) away from the fixed seat (10). The pallet (31) is arranged with an inclined structure that is lower in the front and higher in the back. The end of the pallet (31) close to the fixed seat (10) is rotatably connected to the fixed seat (10). A first hydraulic rod (33) is rotatably connected between the bottom surface of the pallet (31) and the top surface of the fixed seat (10).

7. A special lathe for automatic continuous cutting of pipe sockets according to claim 6, characterized in that, The material preparation mechanism (40) includes a fixed frame (41), which is connected and fixed to a fixed seat (10). A rotating plate (42) is rotatably connected to the upper part of the fixed frame (41). The rotating plate (42) has a V-shaped structure. A second hydraulic rod (43) is rotatably connected between one end of the bottom surface of the rotating plate (42) and the top surface of the fixed seat (10). Two guide plates (44) are symmetrically arranged on both sides of the rotating plate (42). The guide plates (44) are arranged with an inclined structure that is higher in the front and lower in the back. The guide plates (44) are connected and fixed to the fixed seat (10).

8. A special lathe for automatic continuous cutting of pipe sockets according to claim 7, characterized in that, The lifting mechanism (50) includes a second scissor lift platform (51), the bottom fixed end of the second scissor lift platform (51) is connected and fixed to the top surface of the fixed seat (10), and a limiting plate (52) is fixed on the top surface of the second scissor lift platform (51). The limiting plate (52) has a V-shaped structure, and the lowest point of the concave surface of the limiting plate (52) corresponds to the position of the output end of the motors (22) on both sides.

9. A special lathe for automatic continuous cutting of pipe sockets according to claim 8, characterized in that, The discharge mechanism (60) includes a support frame (61), which is located behind the second scissor lift platform (51) and is fixedly connected to the fixed seat (10). A lever plate (62) is rotatably connected to the support frame (61). The lever plate (62) is arranged with an inclined structure that is lower in the front and higher in the back. The side of the lever plate (62) near the second scissor lift platform (51) has a U-shaped structure. Two extrusion blocks (621) are symmetrically fixed on the top surface of the lever plate (62) near the second scissor lift platform (51). A third hydraulic rod (63) is rotatably connected between the bottom surface of the lever plate (62) away from the second scissor lift platform (51) and the support frame (61).

10. A special lathe for automatic continuous cutting of pipe sockets according to claim 9, characterized in that, The support frame (61) is provided with a bracket (64) at the rear. The bracket (64) is connected and fixed to the fixed seat (10). A feeding tray (65) is rotatably connected to the bracket (64). The top surface of the feeding tray (65) is concave. A fourth hydraulic rod (66) is rotatably connected between the bottom surface of the feeding tray (65) and the bracket (64). The feeding tray (65) is driven by the fourth hydraulic rod (66), and its rotation angle range is 0 to 90 degrees.

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