A raw material cutting device based on sheet metal workpiece production

Abstract

The present application relates to the field of sheet metal workpiece processing, and particularly relates to a raw material cutting device based on sheet metal workpiece production, which comprises a feeding table and a discharging table; an annular connection frame is arranged on the end of the feeding table close to the discharging table, a gear ring is arranged on the connection frame, a rotatable end shell around the axis is symmetrically arranged on the outer ring of the gear ring, an electric push rod is arranged on the opposite end face of the two end shells, a cutter seat is arranged on the end of the electric push rod, a cutter for cutting raw material is assembled on the cutter seat, through the cooperation between the conveying roller, the lead screw, the servo motor and the ring cutting mechanism, automatic feeding, automatic positioning and automatic cutting of the pipe material can be realized, manual frequent adjustment of the workpiece position is not needed, the production automation degree and the production efficiency are improved, meanwhile, the top block is arranged to extend into the material, the inner side wall of the pipe material is supported during the cutting process of the cutter, the radial extrusion force generated during the cutting of the cutter can be effectively offset, the possibility of collapse, oval deformation and cutting loss of the thin-walled pipe material is reduced, and the cutting precision is improved.

Description

Technical Field

[0001] This invention relates to the field of sheet metal workpiece processing, specifically a raw material cutting device based on sheet metal workpiece production. Background Technology

[0002] Sheet metal parts are widely used in furniture manufacturing, automotive parts, appliance housings, and building decoration. In the production process of sheet metal parts, it is usually necessary to cut raw materials such as round tubes, square tubes, or special-shaped tubes to a fixed length to obtain workpiece dimensions that meet the requirements of subsequent stamping, bending, welding, or assembly. Therefore, the raw material cutting process is an important link in the production process of sheet metal parts.

[0003] Currently, sheet metal tubing is mostly cut using saw blade cutters, abrasive wheel cutters, laser cutting equipment, or reciprocating cutter equipment. However, for thin-walled round or square sheet metal tubing, due to its relatively poor rigidity, it is easily affected by radial extrusion force and cutting reaction force during the cutting process. This can cause localized dents, elliptical deformation, or cut collapse, especially when the cutter is about to sever the end of the tubing. The remaining connection area is small, and the end of the tubing lacks effective support, making it more prone to cut deformation, thus affecting subsequent assembly accuracy and product quality.

[0004] Furthermore, while some existing cutting equipment is equipped with clamping mechanisms to secure the pipes, most employ external clamping methods, which only constrain the outer surface of the pipe and lack effective support for the internal structure. When the cutter enters the pipe, the pipe wall is still prone to inward deformation, especially for pipes of different diameters. Traditional fixed-size support structures are insufficient to accommodate multiple product specifications, limiting the equipment's applicability and requiring frequent clamp replacements or tooling adjustments, thus increasing production costs and setup time.

[0005] On the other hand, after the pipe is cut, burrs, flaking, or local protrusions usually remain at the cut position, especially during the high-speed cutting of thin-walled pipes. Burrs not only affect the appearance quality of the product, but may also cause interference during subsequent welding, splicing, or assembly, and may even scratch the operators. Currently, most production lines need to add a deburring process after the cutting is completed, which not only increases equipment investment, but also increases the number of times the workpiece is handled, reducing the overall processing efficiency.

[0006] Therefore, a raw material cutting device based on sheet metal workpiece production is proposed to address the above problems. Summary of the Invention

[0007] In order to overcome the shortcomings of the prior art, at least one technical problem raised in the background art is solved.

[0008] The technical solution adopted by the present invention to solve its technical problem is as follows: The present invention provides a raw material cutting device based on sheet metal workpiece production, including a loading platform and a unloading platform; the loading platform is provided with a conveying roller, and the material moves along the conveying roller towards the unloading platform; the end of the loading platform near the unloading platform is provided with a ring-shaped connecting frame, the connecting frame is provided with a toothed ring, and the outer ring of the toothed ring is symmetrically provided with end shells that can rotate around its axis; the opposite end faces of the two end shells are provided with electric push rods, the end of the electric push rods is provided with a cutter seat, and the cutter seat is equipped with a cutter for cutting raw materials; The unloading platform is symmetrically provided with sliding grooves, and a lead screw is provided in the sliding groove. A support frame is threaded onto the lead screw, and a servo motor is provided between the support frames. A rotating shaft is fixed to the output end of the servo motor. The end of the rotating shaft extends towards the gear ring, and a cylindrical top block is fixed to the end of the rotating shaft. The top block is used to support the inner wall of the material.

[0009] Preferably, two No. 1 telescopic grooves are symmetrically opened on the outer ring of the middle part of the top block, and a top plate is sealed and slidably connected in each No. 1 telescopic groove, and the top plate is connected in the No. 1 telescopic groove by a spring; The rotating shaft has a No. 1 through hole inside, which is opened along the length of the rotating shaft. The air inlet end of the No. 1 through hole is set on the outer ring of one end of the rotating shaft, and the air outlet end of the No. 1 through hole extends into the top block and is connected to the two No. 1 telescopic grooves. A slip ring is rotatably connected to the shaft, and the slip ring is connected to the air inlet end of the through hole.

[0010] Preferably, the outer circumferential array of the rear end of the top block has multiple second telescopic grooves, each second telescopic groove is sealed and slidably connected with a telescopic block, the outer end face of each telescopic block is rotatably connected with a ball, and each second telescopic groove is connected to the first through hole.

[0011] Preferably, the chute is further provided with a slider, the slider is threadedly connected to a lead screw, and a pressure rod is rotatably connected to the end of the slider near the loading table, and an arc-shaped plate is provided on the pressure rod; The unloading platform is provided with a guide plate on the outer wall near the loading platform. The guide plate extends upward and is attached to the surface of the pressure rod. When the slider moves towards the loading platform, the guide plate squeezes the pressure rod to deflect, so that the arc plate is squeezed against the outer surface of the material.

[0012] Preferably, the front outer ring of the top block has multiple No. 3 telescopic grooves arranged in a circular array, and each No. 3 telescopic groove is sealed and slidably connected with an extrusion block; The rotating shaft has a No. 2 through hole inside, which is opened along the length of the rotating shaft. The air inlet of the No. 2 through hole is set on the outer ring of one end of the rotating shaft, and the air outlet of the No. 2 through hole extends into the top block and is connected to multiple No. 3 telescopic grooves. A second slip ring is rotatably connected to the shaft, and the second slip ring is connected to the air inlet end of the second through hole.

[0013] Preferably, each of the arc-shaped plates is threaded with an adjusting bolt, the end of which penetrates the arc-shaped plate and can press against the outer surface of the material.

[0014] Preferably, the slider has a cavity inside, a push block is provided in the cavity, a lead screw passes through the cavity and is threaded to the push block, the lead screw drives the push block to move, and the push block pushes the slider to move along the slide groove.

[0015] Preferably, the loading platform is provided with two rows of conveyor rollers, and each row of conveyor rollers is connected to a horizontal plate at its end. The two horizontal plates are connected together by screws, and each screw has two sets of threads symmetrically arranged. When the screws rotate, the upper and lower horizontal plates move towards each other.

[0016] Preferably, cylinders are symmetrically arranged on both sides of the servo motor, and a push plate is fixedly connected to the output end of the cylinder; a guide plate is provided below the unloading platform, and the push plate pushes the material down from the top block, and the material slides away along the guide plate.

[0017] Preferably, a rotating groove is formed on the outer end face of the extrusion block, and a pressure roller is rotatably connected in the rotating groove. The pressure roller is used to extrude the material and cut the edge.

[0018] The advantages of this invention are: 1. In this invention, the cooperation between the conveying roller, lead screw, servo motor and circumferential cutting mechanism enables automatic feeding, positioning and cutting of pipes, eliminating the need for frequent manual adjustment of workpiece position, improving the degree of automation and production efficiency. At the same time, the top block extends into the material to support the inner wall of the pipe during the circumferential cutting process, which can effectively counteract the radial extrusion force generated by the cutting blade, reduce the possibility of collapse, elliptical deformation and out-of-round cut of thin-walled pipes, and improve cutting accuracy.

[0019] In this invention, by setting a top plate, a first telescopic groove, a first through hole, and an air pressure adjustment mechanism, the extension amount of the top plate can be adjusted according to the inner diameter of sheet metal round tubes of different specifications, thereby changing the effective support diameter of the top block. Furthermore, through the adjustable design of the top block diameter, the same cutting device can be used to process round tubes of different specifications without the need for frequent replacement of the inner support tooling, thus improving the equipment's versatility. Attached Figure Description

[0020] Figure 1 This is a first-view perspective perspective view of the raw material cutting device in this invention; Figure 2 This is a second-view perspective perspective view of the raw material cutting device in this invention; Figure 3 This is a front view of the raw material cutting device in this invention; Figure 4 This is a top view of the raw material cutting device in this invention; Figure 5This is a perspective view of the unloading platform in this invention; Figure 6 This is a perspective view of the loading platform in this invention; Figure 7 This is a perspective view of the top block in this invention; Figure 8 This is the front view of the top block in this invention; Figure 9 for Figure 8 A cross-sectional view along the AA direction; Figure 10 for Figure 8 Cross-sectional view along the BB direction; Figure 11 for Figure 8 A cross-sectional view along the CC direction; Figure 12 This is a perspective view of the slider in this invention; Figure 13 This is a cross-sectional view of the slider in this invention; Figure 14 This is a schematic diagram of the interaction between the pusher block and the cavity in this invention.

[0021] In the diagram: 1. Loading platform; 2. Unloading platform; 3. Conveyor roller; 4. Connecting frame; 5. Gear ring; 6. End shell; 7. Electric push rod; 8. Cutter; 9. Slide groove; 10. Lead screw; 11. Support frame; 12. Servo motor; 13. Rotating shaft; 14. Top block; 15. No. 1 telescopic groove; 16. Top plate; 17. Spring; 18. No. 1 through hole; 19. No. 1 slip ring; 20. No. 2 telescopic groove; 21. Telescopic block; 22. Ball bearing; 23. Slider; 24. Pressure rod; 25. Arc plate; 26. Guide plate; 27. Extrusion block; 28. No. 2 through hole; 29. ​​No. 2 slip ring; 30. Adjusting bolt; 31. Cavity; 32. Push block; 33. Horizontal plate; 34. Screw; 35. Cylinder; 36. Push plate; 37. Guide plate; 38. Pressure roller; 39. No. 3 telescopic groove. Detailed Implementation

[0022] To make the technical means, creative features, objectives and effects of this invention easier to understand, the invention will be further described below in conjunction with specific embodiments.

[0023] Reference Figure 1 - Figure 7A raw material cutting device based on sheet metal workpiece production includes a loading platform 1 and a unloading platform 2; the loading platform 1 is provided with a conveying roller 3, and the raw material moves along the conveying roller 3 towards the unloading platform 2. The end of the loading platform 1 near the unloading platform 2 is provided with a ring-shaped connecting frame 4, the connecting frame 4 is provided with a toothed ring 5, and the outer ring of the toothed ring 5 is symmetrically provided with end shells 6 that can rotate around its axis. The opposite end faces of the two end shells 6 are provided with electric push rods 7, and the end of the electric push rod 7 is provided with a cutter seat. The cutter seat is equipped with a cutter 8 for cutting raw materials. The unloading platform 2 is symmetrically provided with sliding grooves 9. A lead screw 10 is provided in the sliding groove 9. A support frame 11 is threadedly connected to the lead screw 10. A servo motor 12 is provided between the support frames 11. A rotating shaft 13 is fixedly connected to the output end of the servo motor 12. The end of the rotating shaft 13 extends towards the gear ring 5, and a cylindrical top block 14 is fixedly connected to the end of the rotating shaft 13. The top block 14 is used to support the inner wall of the raw material. The loading platform 1 is equipped with multiple conveyor rollers 3, each driven by an independent drive motor. Each drive motor is electrically connected to a PLC controller. The PLC controller can control the synchronous rotation of multiple conveyor rollers 3 according to the preset cutting length, thereby driving the raw material to be conveyed from the loading platform 1 to the loading platform 2, realizing automatic fixed-length feeding of sheet metal pipes. A ring-shaped connecting frame 4 is set at one end of the loading platform 1 near the unloading platform 2. The connecting frame 4 is fixedly installed on the frame. A toothed ring 5 is set inside the connecting frame 4. A channel for raw materials to pass through is formed in the center of the toothed ring 5. End shells 6 are symmetrically set on both sides of the outer ring of the toothed ring 5. The end shells 6 can move in a circle around the axis of the toothed ring 5. A reduction motor and a gear set that meshes with the toothed ring 5 are set inside the end shell 6. The reduction motor is controlled by a PLC controller to start, stop and output speed. When the geared motor starts, it meshes with the gear ring 5 through the gear set, enabling the end shell 6 to move circumferentially along the outer ring of the gear ring 5. Electric push rods 7 are installed on opposite sides of the two end shells 6. The telescopic end of the electric push rod 7 is fixedly connected to the cutter seat, and the cutter seat is equipped with a cutter 8. The extension amount of the electric push rod 7 is controlled by the PLC controller. When the end shell 6 moves to the designated position, the PLC controls the electric push rod 7 to extend, so that the cutter 8 cuts into the outer wall of the raw material. Then the geared motor drives the end shell 6 to move circumferentially around the raw material, driving the cutter 8 to perform a circular cut along the outer circumference of the raw material until the entire circumference is cut off. Symmetrical grooves 9 are formed on the unloading platform 2. Screws 10 are installed inside the grooves 9. The screws 10 are driven to rotate by a motor, which is electrically connected to the PLC controller. Support frames 11 are threaded onto the screws 10. A servo motor 12 is installed between the two support frames 11. The output end of the servo motor 12 is connected to a rotating shaft 13. The rotating shaft 13 extends towards the connecting frame 4, and its end is fixedly connected to a cylindrical top block 14. The PLC controls the rotation angle of the servo motor 12 so that the top block 14 can always maintain a preset posture. During operation, the PLC first controls the motor to rotate, driving the support frame 11 to move along the slide groove 9 via the lead screw 10, so that the top block 14 extends into the material to be cut and moves below the cutting position. Then, the PLC controls the servo motor 12 to rotate, so that the top support area of ​​the top block 14 corresponds to the movement trajectory of the cutter 8, thereby providing internal support for the material during the cutting process. During the cutting process, the cutter 8 gradually cuts into the thickness of the material wall, and the top block 14 continuously supports the inner wall of the material, reducing the radial deformation of the material caused by the cutting force. When the cutter 8 completes one circumferential cut, the PLC controls the electric push rod 7 to retract, the cutter 8 exits the kerf, and at the same time controls the geared motor to rotate in the opposite direction, so that the end shell 6 returns to the initial position. Then, the PLC controls the motor to rotate in the opposite direction, so that the support frame 11 retracts, the top block 14 exits the material, and the conveyor roller 3 starts again, transporting the next section of material to be cut to the cutting station, entering the next cycle of processing.

[0024] The entire cutting process includes: S1, Conveyor roller 3 transports the raw material to the cutting station; S2, the lead screw 10 drives the top block 14 to extend into the raw material; S3, servo motor 12 adjusts the angle of top block 14 to the support state; S4, the electric push rod 7 drives the cutter 8 to press against the outer wall of the raw material; S5, the geared motor drives the end shell 6 to move around the toothed ring 5 to achieve ring cutting; S6, cutter 8 completes the full circle cutting; S7, the electric actuator 7 retracts and drives the cutter 8 to exit; S8, end shell 6 reset; S9 and top block 14 exit the raw material interior; S10, conveyor roller 3 continues to feed material, entering the next cutting cycle; This invention, through the cooperation of the conveyor roller 3, lead screw 10, servo motor 12, and circumferential cutting mechanism, enables automatic feeding, positioning, and cutting of pipes, eliminating the need for frequent manual adjustments to the workpiece position, thus improving production automation and efficiency. Simultaneously, the top block 14 extends into the raw material, supporting the inner wall of the pipe during the circumferential cutting process of the cutter 8. This effectively counteracts the radial extrusion force generated by the cutter 8, reducing the possibility of collapse, elliptical deformation, and out-of-round cuts in thin-walled pipes, improving cutting accuracy. Furthermore, the lead screw 10 drives the support frame 11 to move, allowing adjustment of the top block 14's insertion position according to different pipe lengths and specifications, giving the device good adaptability and reducing the frequency of fixture changes. Moreover, through the toothed... Ring 5, end shell 6, geared motor, and gear set form a ring cutting mechanism, enabling the cutter 8 to move continuously around the outer circumference of the raw material. Compared with traditional sawing methods, the cut is smoother, reducing burrs and cut tilt, and improving subsequent assembly quality. The feeding mechanism, positioning mechanism, and cutting mechanism are uniformly controlled by PLC, and the various actuators can automatically coordinate according to the preset program, improving processing consistency and repeatability, which is suitable for batch production processing needs. By combining the internal support of the top block 14 with the external ring cutting, the pipe is constrained both inside and outside during the cutting force. Compared with the traditional simple external clamping structure, better cut roundness and dimensional accuracy can be obtained, achieving simultaneous improvement in cutting quality and processing efficiency.

[0025] Reference Figure 1 - Figure 10 The top block 14 has two symmetrically arranged telescopic grooves 15 on its outer ring in the middle. Each telescopic groove 15 is slidably connected to a top plate 16, and the top plate 16 is connected to the telescopic groove 15 by a spring 17, which provides a restoring force to the top plate 16. The rotating shaft 13 has a through hole 18 inside, which is opened along the length of the rotating shaft 13. The air inlet of the through hole 18 is located on the outer ring of one end of the rotating shaft 13, and the air outlet of the through hole 18 extends into the top block 14 and is connected to the two telescopic grooves 15. A slip ring 19 is rotatably connected to the rotating shaft 13, and the slip ring 19 is connected to the air inlet of the through hole 18. The slip ring 19 is externally connected to a flexible hose, which branches into two independent pipelines. One pipeline is connected to an external air pump, and the other pipeline is connected to an external negative pressure pump. Each pipeline is equipped with an electric valve, which is electrically connected to the PLC controller. When it is necessary to process sheet metal round tubes of different specifications, the operator inputs the specifications of the tubes to be processed into the PLC control system. The PLC controls the air pump pipeline to open according to the preset program. Compressed air enters the interior of the No. 1 telescopic groove 15 through the hose, the No. 1 slip ring 19 and the No. 1 through hole 18. As the air pressure inside the No. 1 telescopic groove 15 increases, the top plate 16 moves outward in the radial direction. Since the top plate 16 is located on the outer ring of the top block 14, its outward extension can change the overall outer diameter of the top block 14, making the top block 14 an adjustable diameter structure. When the top plate 16 extends to the corresponding position, the outer diameter of the top block 14 matches the inner diameter of the tube to be processed, allowing the top block 14 to stably extend into the tube of the corresponding specification. Simultaneously, the PLC synchronously controls the extension of the electric push rod 7 based on the current outer diameter parameter of the top block 14. When the outer diameter of the top block 14 increases, the PLC controls the electric push rod 7 to reduce its extension distance; when the outer diameter of the top block 14 decreases, the PLC controls the electric push rod 7 to increase its extension distance, thereby allowing the cutter 8 to... The cutting trajectory maintains a corresponding relationship with the outer diameter of the circular tube, ensuring that the cutter 8 can cut into the tube wall and complete the circumferential cutting. After the cutting is completed, the PLC shuts off the air pump pipeline and opens the negative pressure pump pipeline. The negative pressure airflow enters the first telescopic groove 15, causing the top plate 16 to retract inward to the initial position. Then, the top block 14 exits the material, completing one cutting cycle. Since the two top plates 16 are arranged symmetrically along the radial direction of the top block 14, a local reinforced support area can be formed in the area corresponding to the cutter 8. When the cutter 8 cuts into the material wall, the top plate 16 can support the area near the cutting area from inside the material, reducing the possibility of the tube wall inward deformation. After the cutting is completed, the PLC closes the air pump pipeline valve and opens the negative pressure pipeline valve. The negative pressure pump generates negative pressure airflow through the hose, slip ring 19, and through hole 18 into the interior of telescopic groove 15. Under the combined action of negative pressure adsorption and spring 17 restoring force, the two top plates 16 retract into the interior of telescopic groove 15 and detach from the inner wall of the raw material. Then the screw 10 drives the support frame 11 to retract, so that the top block 14 can be smoothly withdrawn from the interior of the raw material, avoiding scraping or interference between the top plate 16 and the inner wall of the raw material, and improving the smoothness of the material withdrawal process. By setting up a top plate 16, a first telescopic groove 15, a first through hole 18, and a pneumatic adjustment mechanism, the extension of the top plate 16 can be adjusted according to the inner diameter of sheet metal round tubes of different specifications, thereby changing the effective support diameter of the top block 14. Furthermore, through the adjustable diameter design of the top block 14, the same cutting device can be used to process round tubes of different specifications without the need for frequent replacement of the inner support tooling, thus improving the equipment's versatility.

[0026] Reference Figure 1 - Figure 10 The outer circumferential array of the rear end of the top block 14 has multiple second telescopic grooves 20. Each second telescopic groove 20 is sealed and slidably connected to a telescopic block 21. The outer end face of each telescopic block 21 is rotatably connected to a ball bearing 22. Each second telescopic groove 20 is connected to a first through hole 18. The PLC is connected to an external air pump, which can output compressed gas at different pressure levels. When the top block 14 extends into the raw material, the PLC first controls the air pump to output the first-stage pressurized gas. The first-stage pressurized gas enters the first through hole 18 through the first slip ring 19 and then enters multiple second telescopic grooves 20. Because the first-stage air pressure is relatively low, the thrust it generates is insufficient to overcome the preload of the spring 17 at the top plate 16, so the top plate 16 remains in a contracted state. At the same time, the first-stage air pressure can push multiple telescopic blocks 21 to move outward in the radial direction. As the telescopic blocks 21 move outward, multiple ball bearings 22... As the top block 14 continues to extend into the material, the multiple balls 22 first come into contact with the inner wall of the material. Since the balls 22 can rotate freely, they can roll along the inner wall of the material as the top block 14 moves forward. The rolling contact between the multiple balls 22 and the inner wall of the material reduces the frictional resistance generated when the top block 14 enters the material. At the same time, the multiple balls 22 are distributed in a circumferential direction, which can guide the top block 14 and keep it basically coaxial with the axis of the material, reducing the possibility of the top block 14 deviating or getting stuck during the entry process. After the top block 14 moves to the preset cutting position, the PLC controls the air pump to output the second-stage pressurized gas. The pressure of the second-stage pressurized gas is higher than that of the first-stage pressurized gas. As the air pressure inside the first through hole 18 further increases, the air pressure acting on the top plate 16 gradually increases. When this thrust is greater than the pulling force of the spring 17 on the top plate 16, the top plate 16 moves outward along the first telescopic groove 15. Multiple top plates 16 gradually extend out of the outer surface of the top block 14 and attach to the inner wall of the raw material. After the top plates 16 extend, they can change the effective support diameter of the top block 14, so that the top block 14 and the corresponding gauge... The inner diameter of the raw material is matched, and then the cutter 8 begins to perform a circular cutting operation. During the cutting process, the top plate 16 is continuously attached to the inner wall of the raw material to support and position the cutting area. After the cutting is completed, the PLC controls the air pump to stop supplying air and starts the negative pressure recovery system. Under the action of negative pressure and the restoring force of the spring 17, the top plate 16 first retracts into the first telescopic groove 15, and then the telescopic block 21 retracts into the second telescopic groove 20. Multiple balls 22 are retracted into the top block 14. Finally, the top block 14 returns to its initial state and exits the raw material. By setting up multiple telescopic blocks 21 and ball bearings 22, and adopting a two-stage air pressure control method, the two actions of the top block 14 entering the material and supporting and positioning the material are completed in stages. When the top block 14 enters the material, the first stage of air pressure first drives the telescopic blocks 21 to extend, causing multiple ball bearings 22 to protrude from the outer surface of the top block 14. Since the ball bearings 22 form rolling contact with the inner wall of the material, the frictional resistance generated during the process of the top block 14 extending into the material can be reduced, and the smoothness of the entry process of the top block 14 can be improved. At the same time, the multiple ball bearings 22 are distributed in the circumferential direction, which can guide and center the top block 14, allowing the top block 14 to be more... The top block 14 smoothly enters the raw material, improving positioning accuracy. After the top block 14 reaches the preset position, the second-stage air pressure drives the top plate 16 to extend, increasing the effective support diameter of the top block 14 and attaching it to the inner wall of the raw material. By combining the guidance of the ball bearing 22 with the support of the top plate 16, the separation control of the top block 14's entry guidance and internal positioning support is achieved, which reduces the entry resistance of the top block 14 and improves the support stability during the raw material cutting process. In addition, the sequential action of multiple actuators can be completed through two-stage air pressure control, without the need for additional independent drive mechanisms. The structure is more compact, the control logic is simpler, and it is beneficial to improve the overall operational reliability of the equipment.

[0027] Reference Figure 1 - Figure 5 The slide groove 9 is also provided with a slider 23, which is threadedly connected to a lead screw 10. A pressure rod 24 is rotatably connected to the end of the slider 23 near the loading platform 1. The pressure rod 24 is rotatably connected to the hinge seat on the slider 23 through a torsion spring. An arc plate 25 is provided on the pressure rod 24. When the lead screw 10 rotates, the slider 23 moves along the groove 9 towards the upper material platform 1. During the movement of the slider 23, it drives the pressure rod 24 and the arc plate 25 to move towards the raw material simultaneously. As the slider 23 continues to move, the pressure rod 24 gradually contacts the guide plate 26 fixed on the side wall of the unloading platform 2. Since the guide plate 26 is fixed in position and the slider 23 continues to move forward, the guide plate 26 continuously applies pressure to the pressure rod 24. Under the action of the guide plate 26, the pressure rod 24 rotates around the hinge seat. During the rotation of the pressure rod 24, it gradually compresses the torsion spring and stores elastic potential energy. At the same time, the pressure rod 24 drives the arc plate 25 to swing towards the raw material. When the arc plate 25 contacts the outer surface of the raw material, the pressure rod 24 continues to deflect, causing the arc plate 25 to gradually press against the outer wall of the raw material. At this time, the top plate 16 inside the top block 14 has already extended outward and adhered to the material under the action of the second-stage air pressure. The inner wall of the raw material is supported outward by the top plate 16, while the outer wall is pressed inward by the arc plate 25. The top plate 16 and the arc plate 25 are located on both sides of the raw material in the radial direction, forming a relative clamping state between the inner and outer sides. After clamping, the cutter 8 performs a circular cut around the outer circumference of the raw material. During the cutting process, the top plate 16 and the arc plate 25 continuously support and position the raw material, limiting radial deformation and vibration. After the cutting is completed, the lead screw 10 rotates in the opposite direction, and the slider 23 moves away from the loading table 1. As the pressure rod 24 gradually disengages from the guide plate 26, the squeezing force of the guide plate 26 on the pressure rod 24 disappears, the torsion spring releases the stored elastic potential energy, and drives the pressure rod 24 to rotate back to the initial direction. After the pressure rod 24 is reset, it drives the arc plate 25 away from the outer surface of the raw material, thereby releasing the pressing state on the raw material and creating conditions for the next feeding and cutting.

[0028] By setting up a pressure rod 24, a guide plate 26, and a torsion spring structure, the linear movement of the slider 23 is converted into the radial pressing action of the arc plate 25 through the cooperation between the guide plate 26 and the pressure rod 24, thus realizing automatic clamping of the outer wall of the raw material. During the clamping process, the top plate 16 is supported outward from the inner wall of the raw material, and the arc plate 25 is pressed inward from the outer wall of the raw material. The two form a radially relative clamping structure, thereby improving the stability of the raw material during the cutting process. For thin-walled sheet metal round tubes, the inner and outer clamping structure can effectively reduce the local collapse, out-of-roundness, and cut deformation phenomena caused by the cutting blade 8 during the cutting process, thereby improving the cutting accuracy and cut quality. At the same time, the guide plate 26 is fixedly set, and the action of the pressure rod 24 is automatically triggered by the movement of the slider 23. No additional drive components are required. The positioning of the top block 14 and the external clamping action can be completed synchronously using the same set of lead screw 10 moving mechanism, which improves the linkage of the mechanism and simplifies the equipment structure.

[0029] Reference Figure 1 - Figure 11The top block 14 has multiple No. 3 telescopic grooves 39 arranged in a circular array on the outer circumference of its front end. Each No. 3 telescopic groove 39 is sealed and slidably connected to a compression block 27. The rotating shaft 13 has a No. 2 through hole 28 inside, which is opened along the length of the rotating shaft 13. The air inlet end of the No. 2 through hole 28 is set on the outer circumference of one end of the rotating shaft 13, and the air outlet end of the No. 2 through hole 28 extends into the top block 14 and is connected to the multiple No. 3 telescopic grooves 39. A No. 2 slip ring 29 is rotatably connected to the rotating shaft 13, and the No. 2 slip ring 29 is connected to the air inlet end of the No. 2 through hole 28. The outer side of slip ring 29 is connected to a flexible hose, which branches to form an air pump pipeline and a negative pressure pump pipeline. The air pump pipeline is connected to an external air pump, and the negative pressure pump pipeline is connected to an external negative pressure pump. Each pipeline is equipped with an electric valve, which is electrically connected to a PLC controller. When it is necessary to shape the raw material cutting area, the PLC controls the electric valve on the air pump pipeline to open and simultaneously closes the electric valve on the negative pressure pump pipeline. Compressed gas enters the multiple expansion grooves 39 through the hose, slip ring 29, and through hole 28. Under the action of air pressure, multiple extrusion blocks 27 move outward synchronously and adhere to... On the inner wall near the raw material cut, the servo motor 12 slowly drives the top block 14 to rotate through the rotating shaft 13. At the same time, multiple extrusion blocks 27 apply radial support force to the inner wall of the raw material, thereby shaping the cut area. After the shaping is completed, the PLC closes the electric valve on the air pump pipeline and opens the electric valve on the negative pressure pump pipeline. The negative pressure airflow enters the interior of multiple expansion grooves 39 through the hose, the second slip ring 29 and the second through hole 28. Under the negative pressure adsorption, the multiple extrusion blocks 27 quickly retract into the expansion grooves 39. Then the top block 14 exits the interior of the raw material, completing the shaping process.

[0030] Reference Figure 1 - Figure 5 Each of the arc-shaped plates 25 is threaded with an adjusting bolt 30, the end of which penetrates the arc-shaped plate 25 and can press against the outer surface of the raw material. In use, the operator can rotate the adjusting bolt 30 according to the outer diameter, wall thickness, and clamping requirements of the raw material to be cut. This changes the extension length of the adjusting bolt 30 relative to the inner surface of the arc plate 25. When the arc plate 25 is pressed against the outer surface of the raw material by the pressure rod 24, the end of the adjusting bolt 30 can contact the outer surface of the raw material before or simultaneously with the inner surface of the arc plate 25, thereby applying a local clamping force to the outer wall of the raw material. By adjusting the extension of the adjusting bolt 30, the actual clamping position and degree of the arc plate 25 on the raw material can be changed, allowing the arc plate to... 25 can adapt to sheet metal round tubes with different outer diameter specifications. When the outer diameter of the raw material is small, the adjusting bolt 30 can be unscrewed to extend the end of the adjusting bolt 30 towards the raw material to compensate for the gap between the arc plate 25 and the outer surface of the raw material. When the outer diameter of the raw material is large, the adjusting bolt 30 can be screwed in to avoid the adjusting bolt 30 applying excessive clamping force to the raw material. During the cutting process, the inner wall of the raw material is supported outward by the top plate 16, and the outer wall of the raw material is pressed inward by the arc plate 25 and the adjusting bolt 30, thereby forming an adjustable inner and outer clamping structure to improve the positioning stability of the raw material.

[0031] Reference Figure 1 - Figure 5 ,as well as Figure 12 - Figure 14 The slider 23 has a cavity 31 inside, and a push block 32 is provided inside the cavity 31. The lead screw 10 passes through the cavity 31 and is threaded to the push block 32. The lead screw 10 drives the push block 32 to move, and the push block 32 pushes the slider 23 to move along the slide groove 9. An axial clearance is reserved between the push block 32 and the slider 23. Therefore, during the rotation of the lead screw 10, a free stroke structure is formed between the push block 32 and the slider 23. When the lead screw 10 rotates in the forward direction, the first stroke is executed first. During the first stroke, the push block 32 moves along the axial direction of the lead screw 10 inside the cavity 31. Since the push block 32 has not yet contacted the slider 23, the slider 23 remains stationary. At this time, the support frame 11 moves under the drive of the lead screw 10, causing the top block 14 to gradually extend into the material and complete the internal positioning of the material. When the push block 32 moves to contact the slider 23, the first stroke... The stroke ends; then the lead screw 10 continues to rotate forward and enters the second stroke. At this time, the push block 32 pushes the slider 23 to move along the slide groove 9 towards the upper material table 1. During the movement of the slider 23, it drives the pressure rod 24 to move closer to the guide plate 26. When the pressure rod 24 contacts the guide plate 26, it deflects under the action of the guide plate 26. The deflection of the pressure rod 24 drives the arc plate 25 to swing towards the raw material. The arc plate 25 gradually presses against the outer surface of the raw material. At the same time, the top plate 16 is attached to the inner wall of the raw material, so that the raw material is clamped inside and outside, providing a stable support environment for subsequent circular cutting. After the cutting is completed, the lead screw 10 starts to rotate in the reverse direction. During the reverse rotation, the first return stroke is executed. Since there is a reserved gap between the push block 32 and the slider 23, the slider 23 is not pushed to retract and reset. Instead, the support frame 11 drives the servo motor 12 and the top block 14 to move away from the raw material. The extrusion block 27 moves with the top block 14. During the movement, the front end of the top block 14 gradually approaches the cutting edge of the raw material. When the top block 14 moves to the preset position, the multiple extrusion blocks 27 on the outer ring of the front end of the top block 14 correspond to the cutting area of ​​the raw material. Then, the PLC controls the second through hole 28 to supply air. The multiple extrusion blocks 27 extend outward and attach to the inner wall near the cutting area of ​​the raw material. The extrusion blocks 27 accurately perform local extrusion and shaping on the cutting area. After the shaping is completed, the extrusion blocks 27 retract, the lead screw 10 executes the second return stroke, and the top block 14 continues to exit the raw material, thus completing the entire cutting cycle. By setting a free-stroke structure between the pusher block 32 and the slider 23, the same lead screw 10 can drive different mechanisms to move in a predetermined sequence. When the lead screw 10 rotates in the forward direction, it first completes the positioning action of the top block 14 entering the material, and then drives the arc plate 25 to press the outer surface of the material, thus forming a working mode of first internal positioning and then external clamping. This structure can prevent the arc plate 25 from pressing the material too early and affecting the entry of the top block 14, thereby improving the stability of the material positioning process. After the cutting is completed, when the lead screw 10 rotates in the reverse direction, it first drives the top block 14 to move towards the cutting area, so that the extrusion block 27 can accurately correspond to the cutting edge position. Multiple extrusion blocks 27 precisely shape the cutting area before exiting the raw material, thereby improving the roundness of the cut and the flatness of the edge.

[0032] Reference Figure 1 - Figure 6 The loading platform 1 is provided with two rows of upper and lower conveyor rollers 3. Each row of conveyor rollers 3 is connected to a horizontal plate 33 at its end. The two horizontal plates 33 are connected together by screws 34. Two sets of threads are symmetrically arranged on each screw 34. When the screws 34 rotate, the upper and lower horizontal plates 33 move towards each other. Each screw 34 is connected to a motor, which is located inside the loading platform 1 and controlled by a PLC. The upper horizontal plate 33 is threaded to one set of threaded segments, and the lower horizontal plate 33 is threaded to another set of threaded segments. When the screw 34 rotates, because the two sets of threads rotate in opposite directions, the upper and lower horizontal plates 33 can move synchronously towards each other or synchronously away from each other. When it is necessary to transport sheet metal round tubes of different specifications, the PLC controls the motor to drive the screw 34 to rotate. For round tubes with larger outer diameters, the upper and lower horizontal plates 33 are spaced further apart, creating a larger conveying distance between the upper and lower rows of conveyor rollers 3. For round tubes with smaller outer diameters, the upper and lower horizontal plates 33 are closer together, creating a smaller conveying distance between the upper and lower rows of conveyor rollers 3. After adjustment, the round tube is positioned between the upper and lower rows of conveyor rollers 3. The upper row of conveyor rollers 3 contacts the upper surface of the round tube, and the lower row of conveyor rollers 3 contacts the lower surface of the round tube. When the conveyor rollers 3 rotate, they jointly drive the round tube to move along the conveying direction. Since the upper and lower rows of conveyor rollers 3 clamp the round tube synchronously, they can guide and limit the round tube, so that the round tube maintains a stable posture during the conveying process. When the round tube moves to the cutting station, the upper and lower rows of conveyor rollers 3 stop rotating, creating conditions for the subsequent positioning of the top block 14 and the ring cutting. By setting up the upper and lower rows of conveyor rollers 3 and using the bidirectional threaded screw 34 to drive the upper and lower horizontal plates 33 to move synchronously, the distance between the upper and lower rows of conveyor rollers 3 can be automatically adjusted according to the round tubes of different specifications. Therefore, it is possible to adapt to sheet metal round tubes with different outer diameters without changing the conveying tooling, thus improving the versatility of the equipment.

[0033] Reference Figure 1 - Figure 5 The servo motor 12 is symmetrically equipped with cylinders 35 on both sides, and the output end of the cylinder 35 is fixedly connected to a push plate 36; a guide plate 37 is provided below the unloading platform 2, and the push plate 36 pushes the raw material down from the top block 14, and the raw material slides away along the guide plate 37. After the raw material is cut into a ring, the top plate 16, telescopic block 21, and extrusion block 27 all retract into the top block 14. The arc plate 25 releases the pressure on the outer surface of the raw material. Then, the PLC controls the lead screw 10 to continue rotating in the opposite direction, causing the top block 14 to move the cut raw material segment towards the lower material table 2. When the raw material segment moves above the guide plate 37, the PLC controls two cylinders 35 to extend synchronously. The two cylinders 35 drive the push plate 36 to move towards the raw material segment. The push plate 36 contacts the end face of the raw material segment and continues to push the raw material segment forward, causing the raw material segment to detach from the outside of the top block 14. After detachment, the raw material segment falls onto the guide plate 37 under the action of gravity and slides away from the cutting area along the guide plate 37. After the raw material segment is unloaded, the PLC controls the cylinder 35 to retract, the push plate 36 returns to its initial position, and then the lead screw 10 continues to reset. The top block 14 is re-aligned with the next segment of raw material to be cut, and the next cutting cycle begins.

[0034] Reference Figure 11 The outer end face of the extrusion block 27 has a rotating groove, and the pressure roller 38 is rotatably connected in the rotating groove. The pressure roller 38 is used to extrude the raw material cutting edge. If the extrusion block 27 directly presses against the inner wall of the cut, the following problems will occur: the extrusion block 27 has greater sliding friction with the edge of the cut, and the edge of the cut is easily scratched; the extrusion pressure is concentrated, which can easily form new indentations; and the extrusion block 27 is easily worn when the top block 14 rotates. In this embodiment, after the cutting is completed, multiple pressure rollers 38 correspond to the raw material cutting area. As the extrusion block 27 continuously applies support force outward, the pressure rollers 38 roll and shape the cutting edge. Since the pressure rollers 38 can rotate freely around their own axis, a rolling contact is formed between the pressure rollers 38 and the cutting edge. When the servo motor 12 drives the rotating shaft 13 to rotate slowly, the multiple pressure rollers 38 can roll along the circumferential direction of the cutting. The multiple pressure rollers 38 sequentially roll the entire cutting area. During the rolling process, the local flanging, protrusions, and slightly deformed areas formed by the cutting at the cutting point are continuously rolled by the pressure rollers 38, thereby making the cutting edge gradually flat and improving the quality of the raw material cutting edge.

[0035] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. A raw material cutting device based on sheet metal workpiece production, characterized in that: It includes a loading platform and a unloading platform; the loading platform is equipped with a conveying roller, and the material moves along the conveying roller towards the unloading platform. The end of the loading platform near the unloading platform is equipped with a ring-shaped connecting frame, and the connecting frame is equipped with a toothed ring. The outer ring of the toothed ring is symmetrically equipped with end shells that can rotate around its axis. The opposite end faces of the two end shells are equipped with electric push rods, and the ends of the electric push rods are equipped with cutter seats. The cutter seats are equipped with cutters for cutting raw materials. The unloading platform is symmetrically provided with sliding grooves, and a lead screw is provided in the sliding groove. A support frame is threaded onto the lead screw, and a servo motor is provided between the support frames. A rotating shaft is fixed to the output end of the servo motor. The end of the rotating shaft extends towards the gear ring, and a cylindrical top block is fixed to the end of the rotating shaft. The top block is used to support the inner wall of the material.

2. The raw material cutting device based on sheet metal workpiece production according to claim 1, characterized in that: Two expansion grooves are symmetrically opened on the outer ring of the middle part of the top block. Each expansion groove is sealed and slidably connected to a top plate, and the top plate is connected to the expansion groove by a spring. The rotating shaft has a No. 1 through hole inside, which is opened along the length of the rotating shaft. The air inlet end of the No. 1 through hole is set on the outer ring of one end of the rotating shaft, and the air outlet end of the No. 1 through hole extends into the top block and is connected to the two No. 1 telescopic grooves. A slip ring is rotatably connected to the shaft, and the slip ring is connected to the air inlet end of the through hole.

3. The raw material cutting device based on sheet metal workpiece production according to claim 2, characterized in that: The outer circumferential array at the rear end of the top block has multiple second-order telescopic grooves. Each second-order telescopic groove is sealed and slidably connected to a telescopic block. The outer end face of each telescopic block is rotatably connected to a ball bearing. Each second-order telescopic groove is connected to a first-order through hole.

4. The raw material cutting device based on sheet metal workpiece production according to claim 1, characterized in that: The chute is also equipped with a slider, which is threadedly connected to a lead screw. A pressure rod is rotatably connected to the end of the slider near the loading platform, and an arc-shaped plate is provided on the pressure rod. The unloading platform is provided with a guide plate on the outer wall near the loading platform. The guide plate extends upward and is attached to the surface of the pressure rod. When the slider moves towards the loading platform, the guide plate squeezes the pressure rod to deflect, so that the arc plate is squeezed against the outer surface of the material.

5. The raw material cutting device based on sheet metal workpiece production according to claim 3, characterized in that: The top block has multiple No. 3 telescopic grooves arranged in a circular array around its front end, and each No. 3 telescopic groove has a sealing sliding connection with an extrusion block. The rotating shaft has a No. 2 through hole inside, which is opened along the length of the rotating shaft. The air inlet of the No. 2 through hole is set on the outer ring of one end of the rotating shaft, and the air outlet of the No. 2 through hole extends into the top block and is connected to multiple No. 3 telescopic grooves. A second slip ring is rotatably connected to the shaft, and the second slip ring is connected to the air inlet end of the second through hole.

6. The raw material cutting device based on sheet metal workpiece production according to claim 4, characterized in that: Each of the arc-shaped plates is threaded with an adjusting bolt, the end of which penetrates the arc-shaped plate and can press against the outer surface of the material.

7. The raw material cutting device based on sheet metal workpiece production according to claim 4, characterized in that: The slider has a cavity inside, and a push block is provided in the cavity. A lead screw passes through the cavity and is threaded to the push block. The lead screw drives the push block to move, and the push block pushes the slider to move along the slide groove.

8. The raw material cutting device based on sheet metal workpiece production according to claim 4, characterized in that: The loading platform is equipped with two rows of conveyor rollers, and each row of conveyor rollers is connected to a horizontal plate at its end. The two horizontal plates are connected together by a screw, and two sets of threads are symmetrically arranged on each screw. When the screw rotates, the upper and lower horizontal plates move towards each other.

9. A raw material cutting device for sheet metal workpiece production according to claim 1, characterized in that: The servo motor is symmetrically equipped with cylinders on both sides, and a push plate is fixedly connected to the output end of the cylinder; a guide plate is provided below the unloading platform, and the push plate pushes the material down from the top block, and the material slides away along the guide plate.

10. A raw material cutting device for sheet metal workpiece production according to claim 5, characterized in that: A rotating groove is opened on the outer end face of the extrusion block, and a pressure roller is rotatably connected in the rotating groove. The pressure roller is used to extrude the material and cut the edge.

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