Extra-heavy four-chuck pipe cutting machine with automatic feeding and discharging functions

Abstract

The invention relates to an automatic feeding and discharging extra-heavy four-chuck pipe cutting machine which comprises a laser cutting machine body and a plurality of chucks arranged on the laser cutting machine body and further comprises a stepping type multi-station conveying mechanism. The stepping type multi-station conveying mechanism comprises a base arranged below the laser cutting machine body, and a plurality of clamping grooves used for bearing pipes are formed in the top of the base in the length direction; the material moving assemblies are symmetrically arranged on the two sides of the base; each material moving assembly comprises a connecting frame capable of doing reciprocating linear motion and a plurality of material moving columns driven by the connecting frame and used for pushing and abutting against the pipes from the inner sides of the ends of the pipes. Through cooperative work of the stepping type multi-station conveying mechanism and the auxiliary assembly, a full-automatic material circulation closed loop is constructed, a to-be-machined pipe automatically rolls into the mechanism by means of the inclined discharging frame, then the material moving assemblies on the two sides are driven by the driving structure to synchronously act, and the to-be-machined pipe is conveyed to the conveying mechanism. The material moving columns accurately stretch into the two ends of the pipe and execute stepping circulation of lifting and pushing.

Description

Technical Field

[0001] This invention relates to the field of pipe cutting technology, specifically to an ultra-heavy-duty four-chuck pipe cutting machine with automatic loading and unloading. Background Technology

[0002] The four-chuck laser tube cutting machine is a core piece of equipment in the field of modern high-precision tube processing. It integrates advanced laser cutting technology, precision mechanical design, and CNC system, and is designed to efficiently and effectively complete the complex processing of long tubes. The core feature of this equipment is that it has four synchronously driven chucks, which are usually arranged along the same axis. The first two chucks form the "main clamping system", located near the laser cutting head, and are responsible for providing stable and precise rotation and axial feed during cutting. The last two chucks form the "auxiliary support and feeding system", which is used to support the tail end of the tube and cooperate in completing the tube feeding action. Under the unified command of the CNC system, the four chucks can achieve precise synchronous rotation and axial movement.

[0003] Currently, after the pipes are cut into finished products of a set length on the equipment, operators need to use cranes or other lifting equipment in the workshop to manually lift and move the finished pipe sections after the chuck is released out of the work area and place them on the designated material rack or transfer vehicle. However, the precise CNC cutting process only takes tens of seconds to several minutes, while the subsequent manual lifting, untying, and unloading takes several times longer. This causes the high-efficiency processing equipment to wait frequently, and the overall production line cycle time is limited by the efficiency of manual operation, so the equipment utilization rate cannot be maximized. Summary of the Invention

[0004] The purpose of this invention is to provide an ultra-heavy-duty four-chuck pipe cutting machine with automatic loading and unloading.

[0005] The objective of this invention is achieved through the following technical solution: an ultra-heavy-duty four-chuck pipe cutting machine with automatic loading and unloading, comprising a laser cutting machine body and multiple chucks disposed thereon, and further comprising a stepping multi-station conveying mechanism. The stepping multi-station conveying mechanism includes: The base is located below the laser cutting machine body, and its top has multiple slots along the length direction for supporting the support material. At least one pair of material transfer components are symmetrically arranged on both sides of the base; Each of the aforementioned transfer components includes a reciprocating linear motion connecting frame and a plurality of transfer columns driven by the connecting frame for pushing the tube from the inside of the tube end. A driving structure is connected to the material transfer assembly; the driving structure includes a driving block that is driven to rotate by a driving member, and the driving block interacts with the inner cavity of the connecting frame through its non-circular contour surface, converting the rotational motion into the linear reciprocating motion of the connecting frame; An auxiliary component, located within the base, is used to lift the pipe located at the target loading station to the clamping position of the chuck.

[0006] The material transfer assembly also includes a mounting plate fixed to the side of the base, a connecting plate fixed to the mounting plate, a connecting seat fixed to the top of the connecting frame, a support plate slidably disposed in the connecting seat, and a material transfer plate slidably disposed in the support plate, wherein the material transfer column is threadedly connected to the material transfer plate; The connecting plate, connecting seat, supporting plate and material transfer plate constitute a multi-stage sliding pair, which is used to transmit and convert the linear reciprocating motion of the connecting frame into the composite motion of the material transfer column.

[0007] The material transfer assembly also includes a lifting mechanism; The lifting mechanism includes a base plate fixed to one end of the transfer plate, an extrusion column fixed to the bottom of the base plate, a protrusion fixed to the mounting plate, a first elastic element sleeved between the base plate and the support plate, and a second elastic element disposed between the support plate and the connecting seat. The movement paths of the protrusion and the extrusion column are staggered. During the process of the transfer column pushing the tube, the contact pressure between the extrusion column and the protrusion drives the transfer column to briefly lift the tube away from the bottom surface of the slot, thereby reducing the sliding friction resistance.

[0008] The drive structure also includes a rotating column radially protruding from the output shaft of the drive component, two baffles symmetrically fixed to the surface of the rotating column, and an inclined plate connected between the two baffles. The bottom of the support plate is provided with a contact column, and the movement path of the contact column intersects with the rotation path of the rotating column. The rotating column, inclined plate, and contact column cooperate to form a radial feeding mechanism, which is used to radially feed the material transfer column into or out of the inner cavity of the pipe end before the drive block drives the connecting frame to reciprocate.

[0009] The auxiliary components include multiple electric push rods vertically installed in the base and an electromagnet fixed to the top of the electric push rod. When the pipe steps to the target station, the electromagnet is energized to generate magnetic force to attract the pipe. Then the electric push rod moves to vertically lift the pipe to the clamping center of the chuck.

[0010] The base is provided with a feeding rack and a discharging rack at both ends along the tube conveying direction. The bearing surface of the feeding rack is inclined upward to the laser cutting machine body, and the bearing surface of the discharging rack is inclined downward to the laser cutting machine body. The feeding rack is used to guide the tube to be processed to automatically roll into the slot at the beginning by relying on the inclined surface, and the discharging rack is used to guide the processed tube to roll out from the end of the base by relying on the inclined surface.

[0011] The electric push rod and electromagnet are connected to the control system of the laser cutting machine body. The timing of the electromagnet's energization and de-energization, as well as the lifting stroke of the electric push rod, are controlled by the control system of the laser cutting machine body according to the pipe position and chuck status.

[0012] The driving component is a servo motor or a stepper motor, and both the first elastic component and the second elastic component are springs.

[0013] Compared with the prior art, the advantages of the present invention are as follows: 1. This invention constructs a fully automated material flow closed loop through the coordinated work of a step-by-step multi-station conveyor mechanism and auxiliary components. The pipe to be processed automatically rolls into the mechanism with the help of an inclined feeding rack. Then, the drive structure drives the material transfer components on both sides to move synchronously, so that the material transfer column accurately extends into both ends of the pipe and performs a step-by-step cycle of lifting and pushing. This mechanized continuous conveying process transforms the traditional manual and time-consuming single-piece hoisting operation into an automated assembly line operation synchronized with the laser cutting cycle. Its core beneficial effect is to reduce the idle time of high-efficiency processing equipment due to waiting for manual unloading, compress the loading and unloading time, and improve the utilization rate of equipment. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of an embodiment of the present invention; Figure 2 This is a schematic diagram of the stepping multi-station conveying mechanism of the present invention; Figure 3 This is a schematic diagram of the auxiliary component structure of the present invention; Figure 4 This is a schematic diagram of the material transfer assembly structure of the present invention; Figure 5 This is the present invention. Figure 4 A split diagram; Figure 6 This is a schematic diagram of the second elastic element structure of the present invention; Figure 7 This is a schematic diagram of the driving structure of the present invention; Figure 8 This is the present invention. Figure 7 The split diagram.

[0015] Labeling Explanation: 1. Laser cutting machine body; 101. Chuck; 2. Base; 201. Slot; 3. Connecting frame; 301. Transfer column; 4. Drive component; 401. Drive block; 5. Mounting plate; 501. Connecting plate; 502. Connecting seat; 503. Support plate; 504. Transfer plate; 6. Base plate; 601. Extrusion column; 602. Protrusion; 603. First elastic element; 604. Second elastic element; 7. Rotating column; 701. Baffle; 702. Inclined plate; 703. Contact column; 8. Electric push rod; 801. Electromagnet; 9. Feeding rack; 901. Unloading rack. Detailed Implementation

[0016] The present invention will now be described in detail with reference to the accompanying drawings and embodiments: like Figure 1-8 The diagram shown is an embodiment of an ultra-heavy-duty four-chuck pipe cutting machine with automatic loading and unloading provided by the present invention, including a laser cutting machine body 1 and a plurality of chucks 101 disposed thereon, and also includes a stepping multi-station conveying mechanism. The stepping multi-station conveyor mechanism includes: The base 2 is located below the laser cutting machine body 1, and its top has multiple slots 201 for supporting the support material along the length direction; At least one pair of material transfer components are symmetrically arranged on both sides of the base 2; Each material transfer assembly includes a reciprocating linear motion connecting frame 3 and a plurality of material transfer columns 301 driven by the connecting frame 3 to push the pipe from the inside of the pipe end; The drive structure is connected to the material transfer assembly. The drive structure includes a drive block 401 that is driven to rotate by the drive component 4. The drive block 401 interacts with the inner cavity of the connecting frame 3 through its non-circular contour surface, converting the rotational motion into the linear reciprocating motion of the connecting frame 3. An auxiliary component, located inside the base 2, is used to lift the pipe located at the target loading station to the clamping position of the chuck 101; The beneficial effect of this solution is that it constructs an automated loading and unloading system that is highly integrated with the laser cutting machine body 1 and chuck 101, replacing the traditional operation mode that relies on overhead cranes and manual labor. The mechanism seamlessly connects the loading, conveying and unloading processes through the coordinated work of positioning by the chuck 201, pushing by the material transfer column 301, and lifting by the auxiliary components, compressing the manual hoisting time of several minutes, solving the efficiency bottleneck of heavy pipe processing, and maximizing the utilization rate of the equipment.

[0017] The material transfer assembly also includes a mounting plate 5 fixed to the side of the base 2, a connecting plate 501 fixed on the mounting plate 5, a connecting seat 502 fixed to the top of the connecting frame 3, a support plate 503 slidably disposed in the connecting seat 502, and a material transfer plate 504 slidably disposed in the support plate 503. The material transfer column 301 is threadedly connected to the material transfer plate 504. The connecting plate 501, connecting seat 502, support plate 503 and transfer plate 504 constitute a multi-stage sliding pair, which is used to transmit and convert the linear reciprocating motion of the connecting frame 3 into the composite motion of the transfer column 301. The beneficial effect of this solution is that it transmits, decomposes and transforms the linear reciprocating motion (from the connecting frame 3) generated by the driving structure, and finally accurately guides the material transfer column 301 to complete a complex composite motion trajectory (front-right-back-left).

[0018] The material transfer assembly also includes a lifting mechanism; The lifting mechanism includes a base plate 6 fixed to one end of the transfer plate 504, an extrusion column 601 fixed to the bottom of the base plate 6, a protrusion 602 fixed to the mounting plate 5, a first elastic element 603 sleeved between the base plate 6 and the support plate 503, and a second elastic element 604 disposed between the support plate 503 and the connecting seat 502. The movement paths of the protrusion 602 and the extrusion column 601 are staggered. During the process of the transfer column 301 pushing the pipe, the contact pressure between the extrusion column 601 and the protrusion 602 drives the transfer column 301 to briefly lift the pipe away from the bottom surface of the slot 201 to reduce sliding friction resistance. The beneficial effect of this solution is that it can briefly lift the pipe away from the bottom surface of the slot 201 to a height higher than or equal to the top surface of the base 2. This design transforms the huge sliding friction between the pipe and the base 2 into much smaller rolling or static friction between the transfer column 301 and the inner wall of the pipe, which significantly reduces the driving force and energy consumption required to push heavy pipes, while also reducing wear on the slot 201, improving equipment life and operating economy.

[0019] The drive structure also includes a rotating column 7 radially protruding on the output shaft of the drive component 4, two baffles 701 symmetrically fixed on the surface of the rotating column 7, and an inclined plate 702 connected between the two baffles 701. The bottom of the support plate 503 is provided with a contact column 703, and the movement path of the contact column 703 intersects with the rotation path of the rotating column 7. The rotating column 7, the inclined plate 702 and the contact column 703 cooperate to form a radial feeding mechanism, which is used to radially feed the material transfer column 301 into or out of the inner cavity of the pipe end before the drive block 401 drives the connecting frame 3 to reciprocate. The beneficial effect of this solution is that it constitutes an automatic radial feeding mechanism linked with the main drive. It ensures that before the pushing operation begins, the transfer column 301 can accurately and reliably enter the inner cavity of the tube end to form a grip, and after the pushing is completed, it can automatically exit with the rotation cycle of the drive block 401.

[0020] The auxiliary components include multiple electric push rods 8 vertically installed in the base 2 and an electromagnet 801 fixed to the top of the electric push rod 8. When the pipe steps to the target station, the electromagnet 801 is energized to generate magnetic force to attract the pipe. Then the electric push rod 8 moves to vertically lift the pipe to the clamping center of the chuck 101. The advantages of this solution are that it provides a stable and controllable vertical transfer method. The electromagnet 801 provides a non-contact and firm grip, which is suitable for heavy pipes. The electric push rod 8 realizes smooth and precise linear lifting. The combination of the two avoids the problems of misalignment and excessive impact that may occur with manual or purely mechanical lifting, ensuring the reliability and safety of the loading process, and providing technical support for achieving controlled return (rather than free fall).

[0021] The base 2 is provided with a feeding rack 9 and a discharging rack 901 at both ends along the tube conveying direction. The bearing surface of the feeding rack 9 is inclined upward to the laser cutting machine body 1, and the bearing surface of the discharging rack 901 is inclined downward to the laser cutting machine body 1. The feeding rack 9 is used to guide the tube to be processed to automatically roll into the slot 201 at the beginning by relying on the inclined surface, and the discharging rack 901 is used to guide the processed tube to roll out from the end of the base 2 by relying on the inclined surface. The beneficial effects of this solution are that it realizes automatic loading and unloading of materials by utilizing gravity, without the need for additional power or complex mechanisms. The upward-sloping feeding rack 9 allows the pipes to be processed to automatically roll into the first slot 201, and the downward-sloping unloading rack 901 allows the finished pipes to automatically roll away from the collection after losing support. This simplifies the material interfaces at both ends of the production line and improves the automation and continuity of the entire system.

[0022] The electric push rod 8 and the electromagnet 801 are connected to the control system of the laser cutting machine body 1. The timing of the electromagnet 801 being energized and de-energized, as well as the lifting stroke of the electric push rod 8, are controlled by the control system of the laser cutting machine body 1 according to the position of the pipe and the status of the chuck 101. The beneficial effect of this solution is that it deeply integrates the actions of auxiliary components into the automated control cycle of the entire equipment. The control system accurately commands the electromagnet 801 to pick up and release and the electric push rod 8 to lift and lower according to the position of the pipe and the state of the chuck 101, ensuring strict synchronization and interlocking between the loading action and the chuck clamping, and between the unloading action and the conveying step. This is the core of achieving the efficient parallel cycle of "preparing for conveying during processing and immediately transferring after processing".

[0023] The driving component 4 is a servo motor or a stepper motor, and the first elastic component 603 and the second elastic component 604 are both springs. As a reliable and low-cost elastic element, springs provide the necessary reset power for lifting and radial feed mechanisms, ensuring the automatic cycle and long-term reliability of mechanical actions.

[0024] First, the heavy-duty pipe to be processed is placed on the feeding rack 9 at the feeding end. Since the feeding rack 9 is tilted upward towards the laser cutting machine body 1, the pipe automatically rolls into the first station of the stepping multi-station conveyor mechanism under the action of gravity, that is, the first slot 201 at the top of the base 2. Directly above each slot 201, on the inner side of both ends of the pipe, there is a set of operable transfer columns 301. The number of these columns is matched with the number of stations (slots 201) that the pipe needs to step through. Once the pipe is in place in the first slot 201, the drive structure is activated. The drive component 4 (such as a servo motor) drives the drive block 401 to rotate together with the rotating column 7. The inclined plate 702 on the rotating column 7 rotates until it contacts the contact column 703 at the bottom of the support plate 503. The contour of the inclined plate 702 pushes the contact column 703, allowing the second elastic element 604, which is located between the support plate 503 and the connecting seat 502, to extend and release its elastic force. This drives the support plate 503, the transfer plate 504, and the transfer column 301 fixed thereon to move as a whole toward the pipe axis. This allows multiple transfer columns 301 to extend radially into the internal cavities at both ends of the pipe synchronously and precisely. It is worth noting that there are two sets of transfer components. They are arranged symmetrically on both sides of the base 2 and are driven by the same synchronous control system to ensure that all transfer columns 301 in the two sets of transfer components move in strict synchronization. This allows for uniform force application from both ends of the pipe, ensuring the stability and straightness of the heavy pipe during the transfer process. Subsequently, the non-circular drive block 401 continues to rotate with the drive component 4. Since the drive block 401 is designed to be non-circular (such as triangular), its contour surface will periodically push against the inner wall of the connecting frame 3 during rotation. After being pushed, the connecting frame 3 moves in a straight reciprocating motion along the guide groove on the surface of the connecting plate 501 fixed on the mounting plate 5. This forces the connecting frame 3 to drive all the transfer columns 301 to move along a preset "front-right-back-left" cyclic trajectory through the multi-stage sliding pair of the connecting seat 502, support plate 503, and transfer plate 504. Specifically: "front" means that the transfer column 301 extends radially into the inner cavity of the pipe; "right" means that the transfer column 301 lifts the pipe and pushes it to the right (towards the downward material rack 901) one slot 201 position; "back" means that after being pushed into place, the transfer column 301 radially exits the inner cavity of the pipe; "left" means that the transfer column 301 returns to the starting position of the next working cycle without load. During the "right" or pushing stage, the lifting mechanism begins to function. The base plate 6 fixed on the transfer plate 504 and the pressing column 601 at its bottom come into contact with the protrusion 602 fixed on the mounting plate 5 during the movement. The protrusion 602 forces the base plate 6, the transfer plate 504 and the transfer column 301 to overcome the elastic force of the first elastic element 603 and move upward as a whole, thereby lifting the entire pipe away from the bottom surface of the slot 201. The height at which the pipe is lifted is set to be equal to or slightly higher than the top surface of the base 2, ensuring that the pipe is completely separated from the contact with the slot 201 during the movement. This transforms the huge sliding friction into smaller rolling friction or static friction between the transfer column 301 and the inner wall of the pipe, reducing the resistance and energy consumption of driving the heavy pipe to move. Through the aforementioned stepping motion, the pipes are conveyed one by one to the next slot 201 until they reach the target loading station in the middle of the base 2, directly below the laser cutting machine body 1. At this time, the pre-set auxiliary components below the station are activated, and the electromagnets 801 at the top of the multiple electric push rods 8 are energized, generating a strong magnetic force to firmly attract the pipes. Then, the electric push rods 8 are simultaneously lifted, vertically and smoothly raising the pipes to a position precisely aligned with the clamping center of the multiple chucks 101. After the chucks 101 close and complete the clamping, the electromagnets 801 are de-energized, the electric push rods 8 descend and reset, and the laser cutting machine body 1 then begins to perform high-speed and precise CNC cutting on the firmly clamped pipes. After the cutting process is completed, the chuck 101 is released. At this time, the auxiliary components below are activated again. The electromagnet 801 is energized to attract the finished pipe section, and the electric push rod 8 performs a descent action to stably "place" the finished pipe section back into the corresponding slot 201 below it. Then the electromagnet 801 is de-energized, and the electric push rod 8 is fully reset. This controllable return action avoids the impact, noise and positioning deviation that may be caused by the direct fall of heavy pipes. Subsequently, the stepping multi-station conveyor continues to work, using the cut finished pipe segments as "materials" to continue stepping and conveying them to the feed rack 901. When the finished pipe segment is conveyed to the last slot 201 (i.e., the station connected to the feed rack 901), the transfer column 301 performs the final pushing action, pushing the finished pipe segment to a position where it is completely suspended above the inclined feed rack 901. Then, the transfer column 301 radially exits the inner cavity of the pipe along the trajectory and resets. The finished pipe segment, no longer supported, automatically rolls away from the base 2 along the inclined surface of the feed rack 901 under the action of gravity and smoothly enters the collection area, completing the fully automatic feeding. Throughout the process, the control system of the laser cutting machine body 1 precisely coordinates the timing of the actions of the drive component 4, electric push rod 8, electromagnet 801, and chuck 101. When one tube is being cut, the subsequent tubes are already being prepared on the stepping multi-station conveyor mechanism. When the previous tube is finished being cut and returned to the conveyor line, the next tube to be processed has arrived at the loading station simultaneously, waiting to be lifted. In this way, the manual hoisting and placement time of several minutes in the traditional mode is compressed, the equipment waiting time caused by manual operation is eliminated, and the seamless connection of loading, processing, and unloading processes is achieved, maximizing the utilization rate of equipment and forming an efficient, continuous, and safe production cycle.

Claims

1. A heavy-duty four-chuck tube cutting machine with automatic loading and unloading, comprising a laser cutting machine body (1) and a plurality of chucks (101) disposed thereon, characterized in that: It also includes a stepping multi-station conveyor mechanism; The stepping multi-station conveying mechanism includes: The base (2) is located below the laser cutting machine body (1), and its top has multiple slots (201) for supporting the support material along the length direction. At least one pair of material transfer components are symmetrically arranged on both sides of the base (2); Each of the material transfer components includes a reciprocating linear motion connecting frame (3) and a plurality of material transfer columns (301) driven by the connecting frame (3) to push the pipe from the inside of the pipe end. A driving structure is connected to the material transfer assembly; the driving structure includes a driving block (401) that is driven to rotate by a driving member (4), the driving block (401) interacts with the inner cavity of the connecting frame (3) through its non-circular contour surface, and converts the rotational motion into the linear reciprocating motion of the connecting frame (3); An auxiliary component, located within the base (2), is used to lift the pipe located at the target loading station to the clamping position of the chuck (101).

2. The heavy-duty four-chuck pipe cutting machine with automatic loading and unloading as described in claim 1, characterized in that: The material transfer assembly also includes a mounting plate (5) fixed to the side of the base (2), a connecting plate (501) fixed to the mounting plate (5), a connecting seat (502) fixed to the top of the connecting frame (3), a support plate (503) slidably disposed in the connecting seat (502), and a material transfer plate (504) slidably disposed in the support plate (503). The material transfer column (301) is threadedly connected to the material transfer plate (504). The connecting plate (501), connecting seat (502), support plate (503) and transfer plate (504) constitute a multi-stage sliding pair, which is used to transmit the linear reciprocating motion of the connecting frame (3) and convert it into the composite motion of the transfer column (301).

3. The heavy-duty four-chuck pipe cutting machine with automatic loading and unloading as described in claim 1, characterized in that: The material transfer assembly also includes a lifting mechanism; The lifting mechanism includes a base plate (6) fixed to one end of the transfer plate (504), an extrusion column (601) fixed to the bottom of the base plate (6), a protrusion (602) fixed to the mounting plate (5), a first elastic element (603) sleeved between the base plate (6) and the support plate (503), and a second elastic element (604) disposed between the support plate (503) and the connecting seat (502). The movement paths of the protrusion (602) and the extrusion column (601) are staggered. During the process of the transfer column (301) pushing the tube, the contact pressure between the extrusion column (601) and the protrusion (602) drives the transfer column (301) to briefly lift the tube away from the bottom surface of the slot (201) to reduce sliding friction resistance.

4. The heavy-duty four-chuck pipe cutting machine with automatic loading and unloading as described in claim 2, characterized in that: The drive structure also includes a rotating column (7) radially protruding on the output shaft of the drive member (4), two baffles (701) symmetrically fixed on the surface of the rotating column (7), and an inclined plate (702) connected between the two baffles (701). The bottom of the support plate (503) is provided with a contact column (703), and the movement path of the contact column (703) intersects with the rotation path of the rotating column (7). The rotating column (7), inclined plate (702) and contact column (703) cooperate to form a radial feeding mechanism, which is used to radially feed the material transfer column (301) into or out of the inner cavity of the pipe end before the drive block (401) drives the connecting frame (3) to reciprocate.

5. The heavy-duty four-chuck pipe cutting machine with automatic loading and unloading as described in claim 1, characterized in that: The auxiliary components include multiple electric push rods (8) vertically installed in the base (2) and an electromagnet (801) fixed to the top of the electric push rod (8). When the pipe is stepped to the target station, the electromagnet (801) is energized to generate magnetic force to attract the pipe. Then the electric push rod (8) moves to vertically lift the pipe to the clamping center of the chuck (101).

6. The heavy-duty four-chuck pipe cutting machine with automatic loading and unloading as described in claim 1, characterized in that: The base (2) is provided with a feeding rack (9) and a unloading rack (901) at both ends along the pipe conveying direction. The bearing surface of the feeding rack (9) is inclined upward towards the laser cutting machine body (1), and the bearing surface of the unloading rack (901) is inclined downward away from the laser cutting machine body (1). The feeding rack (9) is used to guide the pipe to be processed to automatically roll into the slot (201) at the beginning by relying on the inclined surface. The unloading rack (901) is used to guide the processed pipe to roll out from the end of the base (2) by relying on the inclined surface.

7. The heavy-duty four-chuck pipe cutting machine with automatic loading and unloading as described in claim 5, characterized in that: The electric push rod (8) and electromagnet (801) are connected to the control system of the laser cutting machine body (1). The timing of the electromagnet (801) being energized and de-energized, as well as the lifting stroke of the electric push rod (8), are controlled by the control system of the laser cutting machine body (1) according to the position of the pipe and the status of the chuck (101).

8. The heavy-duty four-chuck pipe cutting machine with automatic loading and unloading as described in claim 3, characterized in that: The driving component (4) is a servo motor or a stepper motor, and the first elastic component (603) and the second elastic component (604) are both springs.

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