Aluminum alloy circular pipe plasma cutting device for numerical control machining

Abstract

The invention belongs to the technical field of plasma cutting, particularly relates to an aluminum alloy circular pipe plasma cutting device for numerical control machining, and aims to solve the problems of insufficient positioning precision, low automation degree and complex equipment structure in the background technology, according to the following scheme, the aluminum alloy circular pipe plasma cutting device comprises a rack, and a C-shaped plate frame is arranged at the top of the outer wall of one end of the rack; and a plasma cutting mechanism is arranged on the outer wall of the C-shaped plate frame. By means of real-time monitoring of a grating sensor and a grating ruler, the displacement of a linear motor is dynamically corrected in cooperation with a PLC, the cutting path of a plasma spray head is accurately controlled, and the problems that the cutting center of an aluminum alloy circular pipe deviates, and a notch inclines are solved; according to the device, programmable precise feeding of the round pipes is achieved, modular integrated design is adopted, cutting assemblies, pushing assemblies, guiding assemblies and the like are matched in order, a traditional complex structure is simplified, and the manufacturing cost and the maintenance difficulty are reduced.

Description

Technical Field

[0001] This invention relates to the field of plasma cutting technology, and in particular to a plasma cutting device for CNC machining of aluminum alloy round tubes. Background Technology

[0002] Aluminum alloy round tubes, with their advantages of being lightweight, high-strength, and corrosion-resistant, are widely used in construction, machinery, aerospace, and other fields. The precision and efficiency of their cutting and processing directly affect the quality of the final product. Plasma cutting technology, with its advantages of a high-temperature plasma arc above 20,000℃, fast cutting speed, smooth and burr-free cuts, and adaptability to aluminum tubes of different diameters, has become one of the core technologies for processing aluminum alloy round tubes. Compared with the large thermal deformation of traditional flame cutting and the low efficiency of mechanical cutting, it has significant application advantages.

[0003] However, existing plasma cutting equipment for aluminum alloy round tubes still has key technical challenges: First, the positioning accuracy is insufficient. Traditional devices rely on manual adjustment of the axial and radial positions of the tube, which is difficult to adapt to the arc structure of the tube and is prone to causing the cut to tilt and the size deviation due to the center offset. Secondly, the automation level is low. The processes of feeding, clamping, cutting and unloading require multiple manual interventions, which is not only inefficient, but also poses safety risks such as high temperature electric arcs and metal splashes. In addition, the consistency of manual operation is poor, which affects the quality of batch processing. Furthermore, the equipment has a complex structure and often uses multi-axis robotic arms or complex transmission systems. It lacks sufficient design adaptability for round tubes, resulting in high manufacturing costs, difficult subsequent maintenance, and a lack of targeted real-time monitoring mechanisms. During the cutting process, round tubes are prone to problems such as burrs on the cut and slag adhesion due to factors such as vibration and uneven material, which cannot meet the requirements of high-precision processing. Summary of the Invention

[0004] In view of the shortcomings of the prior art, the present invention provides a plasma cutting device for aluminum alloy round tubes for CNC machining, which overcomes the shortcomings of the prior art and effectively solves the problems of insufficient positioning accuracy, low degree of automation and complex equipment structure.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: A plasma cutting device for CNC machining of aluminum alloy round tubes includes a frame. A C-shaped plate frame is provided on the top of the outer wall of one end of the frame, and a plasma cutting mechanism is provided on the outer wall of the C-shaped plate frame. The plasma cutting mechanism includes a plasma cutting component, a support rod, an aluminum tube pushing component, a connecting rod, and an aluminum tube clamp. The plasma cutting component is installed on the inner wall of the C-shaped plate frame, the support rod is provided on one side of the C-shaped plate frame, the aluminum tube pushing component is provided at one end of the support rod, the connecting rod is installed on the outer wall of the aluminum tube pushing component, and the aluminum tube clamp is provided at one end of the connecting rod. The plasma cutting assembly includes a linear motor, a connecting plate, a guide groove, a guide member, a plasma nozzle, and a first cylinder. The linear motor is fixedly connected to the inner wall of one side of the C-shaped frame by bolts. The connecting plate is mounted on the slider of the linear motor. The guide groove is formed on the outer wall of one side of the connecting plate. The guide member is slidably connected to the inner wall of the guide groove. The plasma nozzle is fixedly connected to the outer wall of one end of the guide member. The first cylinder is hinged between the connecting plate and the guide member. A plasma gas pipe is fixedly connected to the top of the plasma nozzle, and a plasma controller is installed on the outer wall of one end of the plasma gas pipe.

[0006] Preferably, the guide groove is divided into a straight section and an arc end, wherein the straight section is located at the front of the guide groove and the arc end is located at the end of the guide groove.

[0007] Preferably, the plasma cutting mechanism further includes a grating sensor and a grating ruler, wherein the grating sensor is fixedly connected to the top outer wall of the connecting plate by screws, the grating ruler is adhered to the top inner wall of the C-shaped frame, and the grating sensor is located directly below the grating ruler.

[0008] Preferably, the aluminum tube pushing assembly includes a motor base, a servo motor, a lead screw, a bearing housing, and a guide rod. The motor base is welded to the outer wall of one end of the support rod. The servo motor is fixedly connected to the inner wall of the bottom of the motor base by screws. The lead screw is fixedly connected to the output shaft of the motor base by a coupling. There are two bearing housings, which are fixedly connected to the inner wall of the bottom of the motor base. The two ends of the lead screw are rotatably connected to the inner wall of the bearing housing. A guide rod is fixedly connected between the two bearing housings. A connecting rod is slidably connected to the outer wall of the guide rod and screwed to the outer wall of the lead screw. A groove is provided on one side of the outer wall of the motor base, and the connecting rod is slidably connected to the inner wall of the groove.

[0009] Preferably, the aluminum tube clamp includes a clamping frame, a second cylinder, a lifting block, a connecting rod, and chucks. The clamping frame is fixedly connected to the outer wall of one end of the connecting rod. The second cylinder is fixedly connected to the bottom outer wall of the clamping frame by screws. The lifting block is fixedly connected to the piston rod of the second cylinder. The connecting rod is hinged to the outer walls of both ends of the lifting block. The chucks are hinged to the outer wall of one end of the connecting rod. Both chucks are rotatably connected to the inner wall of the clamping frame.

[0010] Preferably, the aluminum tube guide assembly includes a plate frame, a V-groove, a sliding roller, and a limiting ring. The plate frame is welded to the other end of the top outer wall of the frame, the V-groove is formed on the top outer wall of the plate frame, the sliding roller is rotatably connected to the bottom inner wall of the plate frame, the limiting ring is installed on the outer wall of the sliding roller, and the aluminum tube body is slidably connected to the outer wall of the sliding roller.

[0011] Preferably, a back plate is welded to one side of the outer wall of the C-shaped frame, and the plasma controller is placed on the top outer wall of the back plate.

[0012] Preferably, a PLC controller is fixedly connected to one side of the outer wall of the back plate by screws, and the PLC controller is connected to the linear motor, the first cylinder, the grating sensor, the servo motor, the second cylinder and the plasma controller by signal lines.

[0013] Preferably, an inclined slide is welded to the outer wall of the other end of the frame at the bottom of the C-shaped plate frame.

[0014] Preferably, the guide component includes a guide ball and a guide plate, wherein the guide ball is disposed on the outer wall of one end of the guide plate and is slidably connected to the inner wall of the guide groove, and the guide plate is installed on the outer wall of the plasma nozzle.

[0015] The beneficial effects of this invention are as follows: 1. The plasma cutting device for aluminum alloy round tubes for CNC machining of the present invention, with the help of real-time monitoring by grating sensors and grating rulers, and the dynamic correction of linear motor displacement by PLC controller, accurately controls the cutting path of plasma nozzle, solves the problems of center offset and kerf tilt in aluminum alloy round tube cutting. The segmented design of the straight section and the arc end of the guide groove ensures that the nozzle feeds quickly and smoothly, and the guide component is smoothly lifted by the first cylinder, avoiding slag adhesion and burr generation at the cutting end point, so that the round tube cut is flat and smooth, and the dimensional accuracy meets the processing standards. 2. The CNC machining aluminum alloy round tube plasma cutting device of the present invention uses a servo motor as the core of the aluminum tube pushing component, combined with lead screw and guide rod transmission, to realize programmable and precise feeding of round tubes. The feeding speed and feed amount can be flexibly adjusted. The aluminum tube clamp drives the chuck to adapt to round tubes of different diameters through a second cylinder and linkage mechanism, clamping evenly and without damage. From guiding and positioning, automatic clamping, to precise feeding and cutting operations, the entire process does not require manual intervention, which reduces human error, greatly improves batch processing efficiency, and reduces labor costs. 3. The plasma cutting device for aluminum alloy round tubes for CNC machining of the present invention adopts a modular integrated design, which orderly combines cutting, pushing, and guiding components, simplifies the traditional complex structure, reduces manufacturing costs and maintenance difficulty, and optimizes the adaptability for the arc structure of round tubes. The aluminum tube guiding component, through the cooperation of V-groove, sliding roller and limiting ring, ensures the straight conveying of the round tube and reduces vibration interference. The grating sensor provides real-time feedback of position data and automatically stops the machine in case of abnormality. The inclined slide table realizes safe unloading, effectively avoids the risks of high temperature electric arc, metal splash and other risks, and ensures stable and safe processing throughout the process. Attached Figure Description

[0016] Figure 1 This is a front view of the overall structure of a plasma cutting device for aluminum alloy round tubes for CNC machining proposed in this invention. Figure 2This is a rear view of the overall structure of a plasma cutting device for aluminum alloy round tubes for CNC machining proposed in this invention. Figure 3 This is a schematic diagram of the plasma cutting mechanism of a plasma cutting device for CNC machining of aluminum alloy round tubes proposed in this invention; Figure 4 This invention provides a schematic diagram of a plasma cutting component for a CNC machining aluminum alloy round tube plasma cutting device. Figure 1 ; Figure 5 This invention provides a schematic diagram of a plasma cutting component for a CNC machining aluminum alloy round tube plasma cutting device. Figure 2 ; Figure 6 This is a schematic diagram of the aluminum tube pushing component of a plasma cutting device for aluminum alloy round tubes in CNC machining, as proposed in this invention. Figure 7 This is a schematic diagram of the aluminum tube clamp structure of a plasma cutting device for aluminum alloy round tubes for CNC machining proposed in this invention; Figure 8 This is a schematic diagram of the internal structure of the aluminum tube clamp of the plasma cutting device for aluminum alloy round tubes for CNC machining proposed in this invention. Figure 9 This is a schematic diagram of the aluminum tube guide assembly of a plasma cutting device for aluminum alloy round tubes in CNC machining, as proposed in this invention. Figure 10 This is a schematic diagram of the guide component structure of a plasma cutting device for aluminum alloy round tubes for CNC machining proposed in this invention.

[0017] In the diagram: 1. Frame; 2. C-shaped plate frame; 3. Plasma cutting mechanism; 31. Plasma cutting assembly; 311. Linear motor; 312. Connecting plate; 313. Guide groove; 314. Guide component; 315. Plasma nozzle; 316. First cylinder; 317. Grating sensor; 318. Grating ruler; 32. Support rod; 33. Aluminum tube pushing assembly; 331. Motor base; 332. Servo motor; 333. Lead screw; 334. 1. Bearing housing; 335. Guide rod; 34. Connecting rod; 35. Aluminum tube clamp; 351. Clamping frame; 352. Second cylinder; 353. Lifting block; 354. Connecting rod; 355. Chuck; 4. Plasma gas pipe; 5. Plasma controller; 6. Aluminum tube guide assembly; 61. Plate frame; 62. V-groove; 63. Sliding roller; 64. Limiting ring; 7. Back plate; 8. PLC controller; 9. Inclined slide table; 10. Guide ball; 11. Guide plate. Detailed Implementation

[0018] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0019] Reference Figures 1-10 Embodiment 1 includes a frame 1, a C-shaped plate frame 2 is provided on the top of the outer wall of one end of the frame 1, and a plasma cutting mechanism 3 is provided on the outer wall of the C-shaped plate frame 2. The plasma cutting mechanism 3 includes a plasma cutting component 31, a support rod 32, an aluminum tube pushing component 33, a connecting rod 34 and an aluminum tube clamp 35. The plasma cutting component 31 is installed on the inner wall of the C-shaped plate frame 2, the support rod 32 is provided on one side of the C-shaped plate frame 2, the aluminum tube pushing component 33 is provided at one end of the support rod 32, the connecting rod 34 is installed on the outer wall of the aluminum tube pushing component 33, and the aluminum tube clamp 35 is provided at one end of the connecting rod 34. In the above scheme, the frame 1, as the basic support structure of the entire device, is welded from high-strength steel and equipped with anti-slip pads at the bottom, providing a stable installation platform for each component and ensuring that the entire device does not shift during the cutting process. The C-shaped frame 2 is fixed to the top of one end of the frame 1 with bolts. Its open structure facilitates the installation and operation of the plasma cutting component 31, while also providing ample space for the entry and exit of the aluminum tube. The support rod 32 connects the C-shaped frame 2 and the aluminum tube pushing component 33, ensuring the stability of the aluminum tube pushing component 33. The connecting rod 34, as a key component connecting the aluminum tube pushing component 33 and the aluminum tube clamp 35, realizes the power transmission, enabling the aluminum tube pushing component 33 to drive the aluminum tube clamp 35 and the clamped aluminum tube to make precise displacement.

[0020] In embodiment two, the plasma cutting assembly 31 includes a linear motor 311, a connecting plate 312, a guide groove 313, a guide member 314, a plasma nozzle 315, and a first cylinder 316. The linear motor 311 is bolted to the inner wall of one side of the C-shaped frame 2. The connecting plate 312 is mounted on the slider of the linear motor 311. The guide groove 313 is formed on the outer wall of one side of the connecting plate 312. The guide member 314 is slidably connected to the inner wall of the guide groove 313. The plasma nozzle 315 is fixedly connected to the guide member 314. On one end of the outer wall, the first cylinder 316 is hinged between the connecting plate 312 and the guide 314. The top of the plasma nozzle 315 is fixedly connected to the plasma pipe 4, and a plasma controller 5 is installed on the outer wall of one end of the plasma pipe 4. The plasma cutting mechanism 3 also includes a grating sensor 317 and a grating ruler 318. The grating sensor 317 is fixedly connected to the top outer wall of the connecting plate 312 by screws, and the grating ruler 318 is bonded to the top inner wall of the C-shaped plate frame 2. The grating sensor 317 is located directly below the grating ruler 318. The guide groove 313 is divided into a straight section and an arc end. The straight section is located at the front of the guide groove 313, and the arc end is located at the end of the guide groove 313.

[0021] Through the above scheme, the linear motor 311 provides power for the horizontal movement of the plasma nozzle 315. Its slider drives the connecting plate 312 and the various components mounted on the connecting plate 312 to move smoothly, ensuring the continuity of the cutting process. The straight section of the guide groove 313 guides the guide member 314 to drive the plasma nozzle 315 to feed in a straight line, ensuring the straightness of the cutting path. The curved end, when the cutting is close to the end point, cooperates with the first cylinder 316 to push the guide member 314 to lift smoothly, so that the plasma nozzle 315 gradually detaches from the aluminum tube, avoiding the problems of slag adhesion and burrs at the cutting end point. The guide member 314 reduces the friction during the movement through the sliding cooperation between the guide ball 10 and the guide groove 313, ensuring the smooth movement of the plasma nozzle 315. As the execution component of the cutting operation, the plasma nozzle 315 receives the plasma arc delivered by the plasma controller 5 through the plasma gas pipe 4 to achieve high-temperature cutting of the aluminum tube. The grating sensor 317 and the grating ruler 318 form a closed-loop feedback system. The grating sensor 317 collects the position information on the grating ruler 318 in real time and transmits it to the PLC controller 8. The PLC controller 8 dynamically corrects the displacement of the linear motor 311 based on the feedback data, thereby accurately controlling the cutting path of the plasma nozzle 315 and effectively improving the positioning accuracy of the cutting.

[0022] In embodiment three, the aluminum tube pushing assembly 33 includes a motor base 331, a servo motor 332, a lead screw 333, a bearing seat 334, and a guide rod 335. The motor base 331 is welded to the outer wall of one end of the support rod 32. The servo motor 332 is fixedly connected to the bottom inner wall of the motor base 331 by screws. The lead screw 333 is fixedly connected to the output shaft of the motor base 331 by a coupling. There are two bearing seats 334, which are fixedly connected to the bottom inner wall of the motor base 331. The two ends of the lead screw 333 are rotatably connected to the inner wall of the bearing seats 334. The guide rod 335 is fixedly connected between the two bearing seats 334. The connecting rod 34 is slidably connected to the outer wall of the guide rod 335 and screwed to the outer wall of the lead screw 333. A groove is opened on one side of the outer wall of the motor base 331, and the connecting rod 34 is slidably connected to the inner wall of the groove.

[0023] Through the above-described design, the motor mount 331 provides a stable mounting platform for components such as the servo motor 332, lead screw 333, and bearing housing 334. Its structure, welded to the support rod 32, ensures the overall load-bearing capacity of the assembly. The servo motor 332, as the power source, features high control precision and fast response speed, driving the lead screw 333 to rotate precisely via a coupling. The bearing housing 334 supports and limits both ends of the lead screw 333, reducing radial runout during rotation and ensuring smooth rotation. The guide rod 335, parallel to the lead screw 333, guides the movement of the connecting rod 34, preventing it from rotating under the drive of the lead screw 333 and ensuring that the connecting rod 34 only moves linearly along the axial direction. The groove on one side of the motor mount 331 further restricts the movement trajectory of the connecting rod 34, improving the stability of the pushing process. When the servo motor 332 drives the lead screw 333 to rotate, the connecting rod 34 screwed on the lead screw 333 achieves precise linear movement under the dual guidance of the guide rod 335 and the slide groove, thereby driving the aluminum tube clamp 35 and the clamped aluminum tube to perform feeding operations. The feeding speed and feed amount can be programmed and adjusted by the PLC controller 8 to adapt to different cutting requirements.

[0024] In embodiment four, the aluminum tube clamp 35 includes a clamping frame 351, a second cylinder 352, a lifting block 353, a connecting rod 354, and a chuck 355. The clamping frame 351 is fixedly connected to the outer wall of one end of the connecting rod 34. The second cylinder 352 is fixedly connected to the bottom outer wall of the clamping frame 351 by screws. The lifting block 353 is fixedly connected to the piston rod of the second cylinder 352. The connecting rod 354 is hinged to the outer walls of both ends of the lifting block 353. The chuck 355 is hinged to the outer wall of one end of the connecting rod 354. Both chucks 355 are rotatably connected to the inner wall of the clamping frame 351.

[0025] Through the above scheme, the clamping frame 351 serves as the overall frame of the aluminum tube clamp 35, providing an installation base for components such as the second cylinder 352, lifting block 353, connecting rod 354, and chucks 355. Its fixed connection to the connecting rod 34 ensures the synchronous movement of the clamp and the pushing assembly. The second cylinder 352 provides power for the clamping action. When the piston rod of the second cylinder 352 extends, it pushes the lifting block 353 upward. The lifting block 353 drives the connecting rod 354, which is hinged at both ends, to move. The connecting rod 354 drives the two chucks 355 to rotate around the inner wall of the clamping frame 351 and move closer to each other, thereby clamping the aluminum tube. When the piston rod retracts, the lifting block 353 moves downward, and the connecting rod 354 drives the chucks 355 to open, completing the material release action. The inner wall of the chucks 355 is provided with anti-slip textures, which can increase the friction with the surface of the aluminum tube, ensuring the stability of the clamping while avoiding damage to the surface of the aluminum tube. The clamp structure achieves synchronous opening and closing of the two chucks 355 through the transmission of the connecting rod 354, resulting in uniform clamping force. It can adapt to aluminum alloy round tubes of different diameters and meet the clamping requirements of various specifications of aluminum tubes without changing the clamp, thus improving the versatility and operational efficiency of the device.

[0026] In embodiment 5, the aluminum tube guide assembly 6 includes a plate frame 61, a V-groove 62, a sliding roller 63, and a limiting ring 64. The plate frame 61 is welded to the other end of the top outer wall of the frame 1. The V-groove 62 is opened on the top outer wall of the plate frame 61. The sliding roller 63 is rotatably connected to the bottom inner wall of the plate frame 61. The limiting ring 64 is installed on the outer wall of the sliding roller 63, and the aluminum tube body is slidably connected to the outer wall of the sliding roller 63.

[0027] Through the above scheme, the plate frame 61 is welded to the frame 1, providing stable installation support for the V-groove 62, the sliding roller 63, and the limiting ring 64. The structural design of the V-groove 62 can adapt to the arc-shaped surface of the aluminum alloy round tube, playing a preliminary positioning and support role for the aluminum tube and preventing lateral deviation during the conveying process. The sliding roller 63 is rotatably connected to the bottom inner wall of the plate frame 61. When the aluminum tube moves under the drive of the pushing component, the sliding roller 63 rotates accordingly, converting the sliding friction between the aluminum tube and the plate frame 61 into rolling friction, greatly reducing the friction during the conveying process, making the feeding of the aluminum tube smoother, and avoiding scratches on the surface of the aluminum tube caused by friction. The limiting ring 64 is installed on the outer wall of the sliding roller 63, further limiting the axial displacement of the aluminum tube, ensuring that the aluminum tube always maintains axial alignment during the conveying process, providing a guarantee for subsequent precise cutting. The setting of the aluminum tube guiding component 6 effectively improves the stability and accuracy of the aluminum tube conveying process and reduces cutting errors caused by conveying deviations.

[0028] A back plate 7 is welded to one side of the outer wall of the C-shaped frame 2, and the plasma controller 5 is placed on the top outer wall of the back plate 7. A PLC controller 8 is fixedly connected to one side of the outer wall of the back plate 7 by screws, and the PLC controller 8 is connected to the linear motor 311, the first cylinder 316, the grating sensor 317, the servo motor 332, the second cylinder 352 and the plasma controller 5 through signal lines.

[0029] Through the above-described scheme, the backplate 7 is welded to one outer wall of the C-shaped frame 2, and its top platform provides a stable placement position for the plasma controller 5, facilitating operation and maintenance by personnel. The PLC controller 8, as the control core of the entire device, establishes communication connections with the linear motor 311, the first cylinder 316, the grating sensor 317, the servo motor 332, the second cylinder 352, and the plasma controller 5 via signal lines, achieving centralized control of each component. The PLC controller 8 can receive position signals fed back by the grating sensor 317 and, according to the preset cutting program, precisely control the motion trajectory of the linear motor 311, the feeding speed of the servo motor 332, the action timing of the first cylinder 316 and the second cylinder 352, and the plasma arc output parameters of the plasma controller 5, enabling all components to work collaboratively to complete the automated cutting process. Simultaneously, the PLC controller 8 has fault detection and alarm functions; when a component malfunctions, it can promptly stop the machine and issue an alarm signal, ensuring the safe operation of the device.

[0030] An inclined slide 9 is welded to the outer wall of the other end of the frame 1 at the bottom of the C-shaped plate frame 2.

[0031] With the above-described solution, the inclined slide 9 is welded to the outer wall of the other end of the frame 1 and located at the bottom of the C-shaped frame 2. Its inclined structure design facilitates the rapid sliding of finished aluminum tubes or waste materials after cutting. After the aluminum tube is cut, the aluminum tube clamp 35 is released, and the aluminum tube falls onto the inclined slide 9 under gravity, sliding along the inclined surface of the inclined slide 9 into the preset collection area. No manual unloading operation is required, realizing the automation of the unloading process. This not only improves the overall work efficiency but also avoids operators directly contacting the high-temperature cut aluminum tubes, reducing safety risks.

[0032] The guide component 314 includes a guide ball 10 and a guide plate 11. The guide ball 10 is disposed on the outer wall of one end of the guide plate 11 and is slidably connected to the inner wall of the guide groove 313. The guide plate 11 is installed on the outer wall of the plasma nozzle 315.

[0033] Through the above-described scheme, the guide plate 11 serves to connect the guide ball 10 and the plasma nozzle 315, ensuring the synchronous movement of the guide component 314 and the plasma nozzle 315. The guide ball 10 is slidably connected to the inner wall of the guide groove 313. Its spherical structure significantly reduces the contact area and friction between it and the guide groove 313, making the sliding of the guide component 314 within the guide groove 313 smoother and reducing jamming during movement. This design ensures that the plasma nozzle 315, driven by the linear motor 311 and the first cylinder 316, can move accurately and smoothly along the trajectory of the guide groove 313, further improving the accuracy of the cutting path and the stability of the cutting process.

[0034] Working principle: First, the operator places the aluminum alloy round tube to be cut into the V-groove 62 of the aluminum tube guide assembly 6. Supported by the sliding roller 63, the aluminum tube is axially positioned by the limiting ring 64, ensuring that the aluminum tube axis is aligned with the cutting path. Then, the operator inputs cutting parameters, including cutting length, feeding speed, and clamping force, through the PLC controller 8 and starts the device. The PLC controller 8 first sends a signal to the second cylinder 352, causing the piston rod of the second cylinder 352 to extend and push the lifting block 353 upward. The lifting block 353 drives the two clamps 355 to move closer together via the connecting rod 354, firmly clamping the aluminum tube. After clamping, the PLC controller 8 controls the servo motor 332 to start. The servo motor 332 drives the lead screw 333 to rotate via the coupling. The connecting rod 34, screwed onto the lead screw 333, is guided by the guide rod 335 and the slide groove of the motor base 331, driving the aluminum tube clamp 35 and the clamped aluminum tube to move towards the plasma cutting assembly 31, achieving precise feeding. During the feeding process, the PLC controller 8 monitors the displacement in real time according to the preset length. When the aluminum tube reaches the preset cutting position, the servo motor 332 stops running. Next, the PLC controller 8 starts the plasma controller 5, and the plasma nozzle 315 receives the high-temperature plasma arc through the plasma gas pipe 4. Simultaneously, it controls the linear motor 311 to start. The slider of the linear motor 311 drives the connecting plate 312 and the plasma nozzle 315 to move horizontally, initiating the cutting operation. During the cutting process, the grating sensor 317 collects the position information on the grating ruler 318 in real time and feeds the data back to the PLC controller 8. The PLC controller 8 dynamically corrects the displacement of the linear motor 311 based on the feedback data to ensure accurate cutting path. When the plasma nozzle 315 moves to the arc end of the guide groove 313, the PLC controller 8 controls the first cylinder 316 to operate. The first cylinder 316 pushes the guide member 314 to slide along the arc end, allowing the plasma nozzle 315 to rise smoothly, preventing molten slag adhesion and completing the cutting operation. After cutting, PLC controller 8 controls plasma controller 5 to shut down the plasma arc, linear motor 311 drives plasma nozzle 315 to reset, piston rod of second cylinder 352 retracts, clamp 355 opens, and the cut aluminum tube falls onto inclined slide 9 under gravity, sliding into collection area. Subsequently, servo motor 332 starts again, driving aluminum tube clamp 35 to reset, preparing for the next feeding. This cycle repeats, achieving automated, high-precision cutting of batch aluminum alloy round tubes.

[0035] 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 technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A plasma cutting device for aluminum alloy round tubes in CNC machining, comprising a frame (1), characterized in that, A C-shaped frame (2) is provided on the top of the outer wall of one end of the frame (1), and a plasma cutting mechanism (3) is provided on the outer wall of the C-shaped frame (2). The plasma cutting mechanism (3) includes a plasma cutting component (31), a support rod (32), an aluminum tube pushing component (33), a connecting rod (34), and an aluminum tube clamp (35). The plasma cutting component (31) is installed on the inner wall of the C-shaped frame (2), the support rod (32) is located on one side of the C-shaped frame (2), the aluminum tube pushing component (33) is located at one end of the support rod (32), the connecting rod (34) is installed on the outer wall of the aluminum tube pushing component (33), and the aluminum tube clamp (35) is located at one end of the connecting rod (34). The plasma cutting assembly (31) includes a linear motor (311), a connecting plate (312), a guide groove (313), a guide member (314), a plasma nozzle (315), and a first cylinder (316). The linear motor (311) is fixedly connected to the inner wall of one side of the C-shaped frame (2) by bolts. The connecting plate (312) is installed on the slider of the linear motor (311). The guide groove (313) is opened on the outer wall of one side of the connecting plate (312). The guide member (314) is slidably connected to the inner wall of the guide groove (313). The plasma nozzle (315) is fixedly connected to the outer wall of one end of the guide member (314). The first cylinder (316) is hinged between the connecting plate (312) and the guide member (314). The top of the plasma nozzle (315) is fixedly connected to a plasma gas pipe (4), and a plasma controller (5) is installed on the outer wall of one end of the plasma gas pipe (4).

2. The plasma cutting device for aluminum alloy round tubes for CNC machining according to claim 1, characterized in that, The guide groove (313) is divided into a straight section and an arc end. The straight section is located at the front of the guide groove (313), and the arc end is located at the end of the guide groove (313).

3. The plasma cutting device for aluminum alloy round tubes for CNC machining according to claim 1, characterized in that, The plasma cutting mechanism (3) also includes a grating sensor (317) and a grating ruler (318). The grating sensor (317) is fixedly connected to the top outer wall of the connecting plate (312) by screws, and the grating ruler (318) is bonded to the top inner wall of the C-shaped frame (2). The grating sensor (317) is located directly below the grating ruler (318).

4. The plasma cutting device for aluminum alloy round tubes for CNC machining according to claim 1, characterized in that, The aluminum tube pushing assembly (33) includes a motor base (331), a servo motor (332), a lead screw (333), a bearing housing (334), and a guide rod (335). The motor base (331) is welded to the outer wall of one end of the support rod (32). The servo motor (332) is fixedly connected to the bottom inner wall of the motor base (331) by screws. The lead screw (333) is fixedly connected to the output shaft of the motor base (331) by a coupling. The bearing housing (334) includes two... One is fixedly connected to the bottom inner wall of the motor base (331), and the two ends of the lead screw (333) are rotatably connected to the inner wall of the bearing seat (334). A guide rod (335) is fixedly connected between the two bearing seats (334). The connecting rod (34) is slidably connected to the outer wall of the guide rod (335), and the connecting rod (34) is screwed to the outer wall of the lead screw (333). A sliding groove is opened on one side of the outer wall of the motor base (331), and the connecting rod (34) is slidably connected to the inner wall of the sliding groove.

5. The plasma cutting device for aluminum alloy round tubes for CNC machining according to claim 1, characterized in that, The aluminum tube clamp (35) includes a clamping frame (351), a second cylinder (352), a lifting block (353), a connecting rod (354), and a chuck (355). The clamping frame (351) is fixedly connected to the outer wall of one end of the connecting rod (34). The second cylinder (352) is fixedly connected to the bottom outer wall of the clamping frame (351) by screws. The lifting block (353) is fixedly connected to the piston rod of the second cylinder (352). The connecting rod (354) is hinged to the outer walls of both ends of the lifting block (353). The chuck (355) is hinged to the outer wall of one end of the connecting rod (354). Both chucks (355) are rotatably connected to the inner wall of the clamping frame (351).

6. The plasma cutting device for aluminum alloy round tubes for CNC machining according to claim 1, characterized in that, The aluminum tube guide assembly (6) includes a plate frame (61), a V-groove (62), a sliding roller (63), and a limiting ring (64). The plate frame (61) is welded to the other end of the top outer wall of the frame (1). The V-groove (62) is opened on the top outer wall of the plate frame (61). The sliding roller (63) is rotatably connected to the bottom inner wall of the plate frame (61). The limiting ring (64) is installed on the outer wall of the sliding roller (63). The aluminum tube body is slidably connected to the outer wall of the sliding roller (63).

7. The plasma cutting device for aluminum alloy round tubes for CNC machining according to claim 1, characterized in that, A back plate (7) is welded to one side of the outer wall of the C-shaped frame (2), and the plasma controller (5) is placed on the top outer wall of the back plate (7).

8. The plasma cutting device for aluminum alloy round tubes for CNC machining according to claim 7, characterized in that, The outer wall of one side of the back plate (7) is fixedly connected to a PLC controller (8) by screws, and the PLC controller (8) is connected to the linear motor (311), the first cylinder (316), the grating sensor (317), the servo motor (332), the second cylinder (352) and the plasma controller (5) by signal lines.

9. The plasma cutting device for aluminum alloy round tubes for CNC machining according to claim 1, characterized in that, The other end of the frame (1) has an inclined slide (9) welded to the bottom of the C-shaped plate frame (2).

10. The plasma cutting device for aluminum alloy round tubes for CNC machining according to claim 1, characterized in that, The guide component (314) includes a guide ball (10) and a guide plate (11), wherein the guide ball (10) is disposed on the outer wall of one end of the guide plate (11), and the guide ball (10) is slidably connected to the inner wall of the guide groove (313), and the guide plate (11) is installed on the outer wall of the plasma nozzle (315).

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