Large cold-formed steel square and rectangular tube automatic sorting and stacking system and method

Abstract

The present application relates to a large cold-bending section steel square tube automatic sorting and stacking system, comprising a first area and a second area; the first area comprises tail alignment V-shaped roller, pneumatic pushing, hydraulic material collecting lever, conveying chain, hydraulic pushing device, air-powered tumbling dog pushing plate, air-powered guide plate, hydraulic lifting stacking platform, stacking and packing conveying flat roller and passive guide vertical roller; the second area comprises repair product and waste product collecting V-shaped roller, two-way material shifting device, fixed head, repair product collecting groove and waste product collecting groove. The present application also relates to a large cold-bending section steel square tube automatic sorting and stacking method using the large cold-bending section steel square tube automatic sorting and stacking system, comprising automatic sorting process, automatic stacking process and automatic collecting repair product and waste product process. The present application reduces equipment loss and production cost; at the same time, it simplifies system mechanical structure and electrical control system, improves automation degree, reduces failure rate and system cost.

Description

Technical Field

[0001] This invention relates to the field of cold-formed steel stacking technology, and more specifically to an automatic sorting and stacking system and method for large cold-formed steel square and rectangular tubes. Background Technology

[0002] Hot-rolled steel coils undergo multiple assembly line processes, including uncoiling, looping, rough forming, high-frequency welding, precision forming, and length sawing, to become cold-formed steel products. These products then need to be sorted into standard products, repaired products, and scrap. Standard products are directly stacked into bundles for easy transport and shipping. Previously, large cold-formed steel square and rectangular tubes were sorted manually, and standard products were primarily stacked manually, using overhead cranes to lift and stack them one by one. In recent years, large-scale cold-formed steel units installed in China have all adopted electromagnetic stacking for automated stacking.

[0003] The shortcomings of existing technologies are as follows: 1. The manual sorting and stacking sites are scattered and cannot be integrated with the existing automatic bundling machines on the market to form an assembly line. After the palletizing is completed, it can only be manually bundled one by one, which makes the entire palletizing and packaging process time-consuming and labor-intensive.

[0004] 2. Electromagnetic palletizing systems have disadvantages such as high difficulty in mechanical processing and assembly, complex electrical control systems, and high costs.

[0005] 3. Since the traditional product alignment method is head alignment, a dedicated lifting head is required for sorting. The dedicated lifting head is easily damaged by frequent heavy impacts from large cold-formed steel square and rectangular tubes, which increases production costs. Summary of the Invention

[0006] To address the aforementioned problems, this invention provides an automatic sorting and palletizing system and method for large cold-formed steel square and rectangular tubes. The purpose is to reduce equipment wear and tear and production costs; at the same time, it simplifies the system's mechanical structure and electrical control system, improving the degree of automation while reducing the failure rate and system cost.

[0007] To solve the above problems, the technical solution provided by the present invention is as follows: An automated sorting and palletizing system and method for large cold-formed steel square and rectangular tubes includes a first area for automatically palletizing genuine products, a second area for collecting repaired and defective products, and a real coordinate system, wherein: The true coordinate system takes the starting point of the large cold-formed steel square and rectangular tube automatic sorting and palletizing system as the origin, the axis extending laterally from left to right along the horizontal plane as the X-axis, the axis extending longitudinally from inside to outside along the horizontal plane as the Y-axis, and the axis extending from bottom to top perpendicular to the horizontal plane as the Z-axis. The first area includes a tail-aligning V-shaped roller conveyor, a pneumatic pusher, a hydraulic material collection lever, a conveyor chain, a hydraulic alignment device, a pneumatic tumbler pusher, a pneumatic guide plate, a hydraulic lifting palletizing platform, a palletizing and packaging conveying flat roller, and a passive guide vertical roller. The second area includes a V-shaped roller conveyor for collecting repaired and scrap products, a bidirectional feeding device, a fixed stop, a repaired product collection trough, and a scrap collection trough; The tail-aligned V-shaped roller conveyor, the pneumatic pusher, the hydraulic collecting lever, and the starting end of the conveyor chain are arranged side by side and parallel to each other from left to right along the X-axis. The end of the conveyor chain, the hydraulic pushing device, the pneumatic tumbler pusher, the pneumatic guide plate, the hydraulic lifting palletizing platform, the palletizing and packing conveying flat roller, and the passive guide vertical roller are arranged in parallel and spaced from the inside to the outside along the Y-axis. The V-shaped roller conveyor for collecting repaired and waste products and the bidirectional feeding device are arranged in parallel and spaced from left to right along the X-axis. The repair product collection tank, the bidirectional feeding device, and the waste product collection tank are arranged in parallel from the outside to the inside along the Y-axis. The fixed stop is at the very end of the V-shaped roller conveyor for collecting repaired and scrap products.

[0008] Preferably, the tail-aligned V-shaped roller conveyor includes a single-drive V-shaped roller and a first roller conveyor motor. The first frame of the single-drive V-shaped roller at the entrance of the large cold-formed steel square and rectangular tube automatic sorting and palletizing system is equipped with through-beam photoelectric sensors on both sides. The pneumatic pusher includes a first cylinder, a first pusher trolley, a first pusher guide rail, and a first pin; the first cylinder is movably connected to the first pusher trolley via the first pin; the first pusher trolley reciprocates along the Y-axis within the first pusher guide rail under the drive of the first cylinder. The hydraulic material collection lever includes a hydraulic cylinder support, a first hydraulic cylinder, a pallet frame, a pallet support, a second pin, a third pin, and a fourth pin. The hydraulic cylinder support is hingedly connected to the first hydraulic cylinder via the second pin. The first hydraulic cylinder is hingedly connected to the pallet frame via the third pin. The pallet frame is hingedly connected to the pallet support via the fourth pin. The pallet frame swings up and down around the fourth pin under the drive of the first hydraulic cylinder. The conveyor chain includes a first drive chain, a chain track plate, a guide rail key, a conveyor chain motor, and a standard ordinary roller chain conveyor chain; the chain track plate is movably connected to the standard ordinary roller chain conveyor chain through a standard roller chain pin to form a closed loop; the chain track plate reciprocates along the Y-axis on the guide rail key under the drive of the conveyor chain motor.

[0009] Preferably, the hydraulic alignment device includes a second hydraulic cylinder, an alignment push plate, a transverse guide rod, and a guide support; the alignment push plate is bolted to the second hydraulic cylinder and the transverse guide rod by a first hexagon socket screw; the transverse guide rod and the guide support form a sliding fit, and under the drive of the second hydraulic cylinder, the alignment push plate reciprocates along the X-axis; The pneumatic self-righting pusher plate includes a second cylinder, a self-righting plate, a second pushing trolley, a second pushing guide rail, and a fifth pin; the self-righting plate is hingedly connected to the second pushing trolley via the fifth pin; the front end stop of the pushing trolley is located at the top of the second pushing guide rail; the second pushing trolley reciprocates along the Y-axis within the second pushing guide rail under the drive of the second cylinder; The pneumatic guide plate includes a third cylinder, a guide plate trolley, a third pusher rail, and a sixth pin; the guide plate trolley is movably connected to the third cylinder via the sixth pin; the guide plate trolley reciprocates along the Y-axis within the third pusher rail under the drive of the third cylinder. The hydraulic lifting palletizing platform includes a buffer platform, a lifting guide rod, a lifting guide seat, and a third hydraulic cylinder; the buffer platform is bolted to the lifting guide rod and the third hydraulic cylinder via second hexagon socket screws; the lifting guide rod and the lifting guide seat form a sliding fit; the buffer platform reciprocates along the Z-axis under the drive of the third hydraulic cylinder; The palletizing and packaging conveying roller includes a conveying roller, a second drive chain, and a roller motor; the roller motor achieves centralized transmission of multiple conveying rollers through the second drive chain; The passive guide roller includes a fixed roller, an adjustable roller, and a lead screw and nut transverse spiral mechanism; the lead screw and nut transverse spiral mechanism controls the adjustable roller to be adjusted along the Y-axis.

[0010] Preferably, the V-shaped roller conveyor for collecting repaired and waste products includes a second V-shaped roller, a third drive chain, and a second roller conveyor motor; the second roller conveyor motor drives the two second V-shaped rollers through the third drive chain.

[0011] A method for automatically sorting and palletizing large cold-formed steel square and rectangular tubes using an automatic sorting and palletizing system includes an automatic sorting process, an automatic palletizing process, and an automatic collection process for repaired and scrap products; wherein, the automatic sorting process includes the following steps: S100. The upstream system sends a signal to the ECU; S200. Analyze the signals sent from the upstream system to the ECU to obtain the attributes of the downstream products; S300. Determine the attributes of the downstream products, and then perform the following steps: When the large cold-formed steel square and rectangular tube automatic sorting and palletizing system receives a genuine product arrival signal, it executes the genuine product sorting process. When the large cold-formed steel square and rectangular tube automatic sorting and palletizing system receives a signal for the arrival of repaired or scrap products, it executes the automatic collection process for repaired and scrap products.

[0012] Preferably, the genuine product sorting process includes the following steps: Sa310. Start the tail alignment V-shaped roller conveyor and simultaneously stop the repair and waste collection V-shaped roller conveyor; Sa320. Genuine products are conveyed along the X-axis via the tail-aligned V-shaped roller conveyor. Sa330. When the genuine product tube head enters the through-beam photoelectric sensor, the through-beam photoelectric sensor starts working and acquires the product entry signal; Sa340. When the tube tail leaves the through-beam photoelectric sensor, the through-beam photoelectric sensor acquires a signal a second time; Sa350. The through-beam photoelectric sensor sends a stop signal to the ECU for the tail-aligned V-shaped roller conveyor; Sa360. Based on the preset shutdown delay, stop the genuine tube tail at the preset position; Sa370. Enter the automated palletizing process in the first area.

[0013] Preferably, the automated collection process for repaired and waste products includes the following steps: Sb310. Start the tail alignment V-shaped roller conveyor and the repair and waste collection V-shaped roller conveyor; simultaneously turn off the through-beam photoelectric sensor; Sb320. Repaired or scrap materials are conveyed along the X-axis into the second region via the tail-aligned V-shaped roller conveyor. Sb330. The V-shaped roller conveyor for collecting repaired and scrap materials will transport the repaired or scrap materials to the fixed stop and stop. Sb340. Start the bidirectional material feeding device and execute the repair and waste collection sub-processes according to the attributes of the off-line products obtained by the ECU.

[0014] Preferably, the sub-process for collecting repaired and waste products includes the following steps: Sb341. Determine whether the product being shipped is a repaired product or a defective product, and perform the following operations based on the determination result: When the incoming material is a repaired product, the bidirectional feeding device feeds the incoming material along the Y-axis to the repaired product collection trough; When the incoming material is scrap, the bidirectional feeding device feeds the incoming material in the opposite direction of the Y-axis to the scrap collection trough.

[0015] Preferably, the automated palletizing process includes the following steps: Sc100. Genuine incoming materials undergo coarse alignment via the aforementioned tail alignment V-shaped roller conveyor; Sc200. The first cylinder of the pneumatic pusher drives the first pusher trolley to push the incoming material along the Y-axis onto the pallet frame of the hydraulic collecting lever; Sc300. When the number of genuine incoming materials collected by the hydraulic collecting lever reaches the preset number of materials required for one row of stacked packages, the first hydraulic cylinder of the hydraulic collecting lever drives the pallet frame to descend. Sc400. After a row of genuine products falls onto the chain tray, the conveyor chain motor drives the standard ordinary roller chain conveyor chain and the row of genuine products on the chain tray along the Y-axis through the first drive chain. Sc500. A row of genuine products is conveyed to the pneumatic self-righting push plate; when a row of genuine products touches the self-righting plate, it falls down due to external force, allowing the row of genuine products to pass smoothly; after the row of genuine products has passed through the self-righting plate, the self-righting plate returns to a vertical state. Sc600. When a row of genuine incoming materials continues to be conveyed to the hydraulic alignment device, the conveyor chain stops; the standard ordinary roller chain of the conveyor chain returns in the negative direction along the Y-axis; after the row of genuine incoming materials returns with the standard ordinary roller chain, it is blocked from the opposite direction by the tumbler plate; the second hydraulic cylinder of the standard ordinary roller chain pushes the alignment push plate along the X-axis to achieve precise alignment of the tail of the row of genuine incoming materials; Sc700. The third cylinder of the pneumatic guide plate drives the pneumatic guide plate trolley to fully extend along the Y-axis; the second cylinder of the pneumatic tumbler pusher drives the tumbler plate to push a row of positive incoming materials onto the extended pneumatic guide plate trolley along the Y-axis. Sc800. The guide plate trolley returns; after the guide plate trolley has fully returned, a row of genuine incoming materials falls onto the buffer platform of the hydraulic lifting palletizing platform; Sc900. The second cylinder drives the tumbler plate to return; then the third hydraulic cylinder drives the hydraulic lifting and palletizing platform to descend along the Z-axis by one product height; Sc1000. Repeat Sc100 to Sc1000 until the preset number of layers required for bundling is reached and the preset standard requirements are met to form a complete stack of bundling, and then execute Sc1100; Sc1100. The third hydraulic cylinder drives the buffer platform to descend below the palletizing and packing conveyor roller; After the entire stack of packages is lowered onto the palletizing and packing conveyor rollers, the passive guide rollers are pre-adjusted to a preset range according to the width of the stack of packages. Sc1300. The flat roller motor drives the conveying flat roller through the second drive chain to convey the stack of bales along the X-axis to the automatic baler for baling under the guidance of the passive guide vertical roller.

[0016] Preferably, the coarse alignment deviation in step Sc100 is less than or equal to 10 mm; The fine alignment deviation in step Sc600 is less than or equal to 1 mm.

[0017] Compared with the prior art, the present invention has the following advantages: 1. Because this invention uses a through-beam photoelectric sensor to achieve tail-end alignment and stopping, it eliminates the need for frequent lifting and lowering of a dedicated lifting head for sorting, thereby reducing equipment wear and production costs.

[0018] 2. Because the present invention achieves automatic stacking of cold-bent square and rectangular tubes through the continuous feedback operation of hydraulic material collection lever, conveyor chain, hydraulic pushing device, pneumatic tumbler pusher plate, pneumatic guide plate and hydraulic lifting stacking platform, it simplifies the mechanical structure and electrical control system of the system, improves the degree of automation and reduces the failure rate and system cost. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of an automatic sorting and palletizing system for large cold-formed steel square and rectangular tubes according to a specific embodiment of the present invention; Figure 2 This is a schematic diagram of the tail-aligned V-shaped roller conveyor of the automatic sorting and palletizing system for large cold-formed steel square and rectangular tubes, according to a specific embodiment of the present invention. Figure 3 A schematic diagram of the pneumatic pushing mechanism of the automatic sorting and palletizing system for large cold-formed steel square and rectangular tubes according to a specific embodiment of the present invention; Figure 4 A schematic diagram of the hydraulic material collection lever of the automatic sorting and palletizing system for large cold-formed steel square and rectangular tubes according to a specific embodiment of the present invention; Figure 5 This is a schematic diagram of the conveyor chain of an automatic sorting and palletizing system for large cold-formed steel square and rectangular tubes, according to a specific embodiment of the present invention. Figure 6 A schematic diagram of the hydraulic alignment device of the automatic sorting and palletizing system for large cold-formed steel square and rectangular tubes according to a specific embodiment of the present invention; Figure 7A schematic diagram of the pneumatic self-propelled pusher plate of the automatic sorting and palletizing system for large cold-formed steel square and rectangular tubes according to a specific embodiment of the present invention; Figure 8 A schematic diagram of the pneumatic guide plate of the automatic sorting and palletizing system for large cold-formed steel square and rectangular tubes according to a specific embodiment of the present invention; Figure 9 A schematic diagram of the hydraulic lifting and palletizing platform of the automatic sorting and palletizing system for large cold-formed steel square and rectangular tubes, which is a specific embodiment of the present invention; Figure 10 A schematic diagram of the palletizing, packaging, and conveying flat rollers of an automatic sorting and palletizing system for large cold-formed steel square and rectangular tubes, according to a specific embodiment of the present invention; Figure 11 A schematic diagram of the passive guide roller of the automatic sorting and palletizing system for large cold-formed steel square and rectangular tubes according to a specific embodiment of the present invention; Figure 12 A schematic diagram of a V-shaped roller conveyor for collecting repaired and scrap products in an automatic sorting and palletizing system for large cold-formed steel square and rectangular tubes, according to a specific embodiment of the present invention; Figure 13 This is a schematic diagram of an automated sorting process according to a specific embodiment of the present invention; Figure 14 This is a schematic diagram of the genuine product sorting process according to a specific embodiment of the present invention; Figure 15 This is a schematic diagram of the automated collection process for repaired and defective products according to a specific embodiment of the present invention; Figure 16 This is a schematic diagram of a sub-process for collecting repaired and waste products according to a specific embodiment of the present invention; Figure 17 This is a schematic diagram of the automated palletizing process according to a specific embodiment of the present invention.

[0020] Wherein: S1. First area, S2. Second area, 1. Tail-aligning V-shaped roller conveyor, 2. Pneumatic pusher, 3. Hydraulic collecting lever, 4. Conveyor chain, 5. Hydraulic alignment device, 6. Pneumatic self-propelled pusher plate, 7. Pneumatic guide plate, 8. Hydraulic lifting palletizing platform, 9. Palletizing and packaging conveyor flat roller, 10. Passive guide vertical roller, 11. Repair and waste collection V-shaped roller conveyor, 12. Bidirectional material feeding device, 13. Fixed stop, 14. Repair collection trough, 15. Waste collection trough, 1 6. Automatic Baling Machine, 1.1. Single-drive V-roller, 1.2. First roller conveyor motor, 1.3. Through-beam photoelectric sensor, 2.1. First cylinder, 2.2. First pusher trolley, 2.3. First pusher guide rail, 2.4. First pin, 3.1. Hydraulic cylinder support, 3.2. First hydraulic cylinder, 3.3. Pallet frame, 3.4. Pallet support, 3.5. Second pin, 3.6. Third pin, 3.7. Fourth pin, 4.1. First drive chain, 4.2. Chain conveyor 4.3. Pallet; 4.4. Guide rail key; 4.5. Conveyor chain motor; 5.6. Standard ordinary roller chain conveyor chain; 5.7. Second hydraulic cylinder; 5.8. Alignment push plate; 5.9. Lateral guide rod; 5.0. Guide support; 6.1. Second cylinder; 6.2. Self-righting plate; 6.3. Second pushing trolley; 6.4. Second pushing guide rail; 6.5. Fifth pin; 6.6. Pushing trolley front stop; 7.1. Third cylinder; 7.2. Guide plate trolley; 7.3. Third... 7.4. Pushing guide rail; 8.1. Buffer platform; 8.2. Lifting guide rod; 8.3. Lifting guide seat; 8.4. Third hydraulic cylinder; 8.5. Second hex socket head cap screw; 9.1. Conveying flat roller; 9.2. Second drive chain; 9.3. Flat roller motor; 10.1. Fixed vertical roller; 10.2. Adjustable vertical roller; 10.3. Lead screw nut transverse spiral mechanism; 11.1. Second V-roller; 11.2. Third drive chain; 11.3. Second roller conveyor motor. Detailed Implementation

[0021] The present invention will be further illustrated below with reference to specific embodiments. It should be understood that these embodiments are for illustrative purposes only and are not intended to limit the scope of the invention. After reading the present invention, any modifications of the present invention in various equivalent forms by those skilled in the art will fall within the scope defined by the appended claims.

[0022] Automatic sorting and palletizing system and method for large cold-formed steel square and rectangular tubes, such as Figure 1 As shown, it includes a first area S1 for automatic palletizing of genuine products, a second area S2 for collecting repaired and defective products, and a real coordinate system, wherein: The real coordinate system takes the starting point of the large cold-formed steel square and rectangular tube automatic sorting and palletizing system as the origin, the axis extending laterally from left to right along the horizontal plane as the X-axis, the axis extending longitudinally from inside to outside along the horizontal plane as the Y-axis, and the axis extending vertically from bottom to top perpendicular to the horizontal plane as the Z-axis.

[0023] The first area S1 includes a tail-aligning V-shaped roller conveyor 1, a pneumatic pusher 2, a hydraulic material collection lever 3, a conveyor chain 4, a hydraulic alignment device 5, a pneumatic tumbler pusher 6, a pneumatic guide plate 7, a hydraulic lifting palletizing platform 8, a palletizing and packaging conveying flat roller 9, and a passive guide vertical roller 10.

[0024] The second area S2 includes a V-shaped roller conveyor 11 for collecting repaired and scrap products, a bidirectional feeding device 12, a fixed stop 13, a repaired product collection trough 14, and a scrap collection trough 15.

[0025] The tail-aligned V-shaped roller conveyor 1, pneumatic pusher 2, hydraulic material collection lever 3, and conveyor chain 4 are arranged in parallel and spaced along the X-axis from left to right.

[0026] The end of the conveyor chain 4, the hydraulic pusher 5, the pneumatic tumbler pusher 6, the pneumatic guide plate 7, the hydraulic lifting palletizing platform 8, the palletizing and packing conveyor roller 9, and the passive guide vertical roller 10 are arranged in parallel and spaced from the inside to the outside along the Y-axis.

[0027] The V-shaped roller conveyor 11 for collecting repaired and scrap products and the bidirectional feeding device 12 are arranged in parallel and spaced intervals from left to right along the X-axis.

[0028] Repaired product collection tank 14, bidirectional material feeding device 12, and waste product collection tank 15 are arranged in parallel from the outside to the inside along the Y-axis.

[0029] The fixed stop 13 is at the very end of the V-shaped roller conveyor 11 for collecting repaired and scrap products.

[0030] like Figure 2 As shown, it should be noted that the tail alignment V-shaped roller conveyor 1 includes a single-drive V-shaped roller 1.1 and a first roller conveyor motor 1.2. The first single-drive V-shaped roller 1.1 at the entrance of the large cold-formed steel square and rectangular tube automatic sorting and palletizing system is equipped with through-beam photoelectric sensors 1.3 on both sides for tail alignment control of the products.

[0031] It should be further explained that the tail-aligning V-shaped roller conveyor 1 is used to transport cold-formed steel products off the line along the X-axis, and to start and stop the products that need to be automatically stacked and packaged, and to achieve coarse alignment at the tail end.

[0032] like Figure 3As shown, it should be noted that the pneumatic pusher 2 includes a first cylinder 2.1, a first pusher trolley 2.2, a first pusher guide rail 2.3, and a first pin 2.4; the first cylinder 2.1 is movably connected to the first pusher trolley 2.2 through the first pin 2.4; the first pusher trolley 2.2 reciprocates along the Y-axis within the first pusher guide rail 2.3 under the drive of the first cylinder 2.1.

[0033] It should be further explained that the pneumatic pusher 2 is used to convey the aligned end-to-end products one by one along the Y-axis to the hydraulic collecting lever 3.

[0034] like Figure 4 As shown, it should be noted that the hydraulic material collection lever 3 includes a hydraulic cylinder support 3.1, a first hydraulic cylinder 3.2, a pallet frame 3.3, a pallet support 3.4, a second pin 3.5, a third pin 3.6, and a fourth pin 3.7. The hydraulic cylinder support 3.1 is hingedly connected to the first hydraulic cylinder 3.2 via the second pin 3.5. The first hydraulic cylinder 3.2 is hingedly connected to the pallet frame 3.3 via the third pin 3.6. The pallet frame 3.3 is hingedly connected to the pallet support 3.4 via the fourth pin 3.7. The pallet frame 3.3 swings up and down around the fourth pin 3.7 under the drive of the first hydraulic cylinder 3.2.

[0035] It should be further explained that the hydraulic collection lever 3 is used to collect and store the genuine products until the required number of rows of genuine products are reached, at which point it is released.

[0036] like Figure 5 As shown, it should be noted that the conveyor chain 4 includes a first drive chain 4.1, a chain track plate 4.2, a guide rail key 4.3, a conveyor chain motor 4.4, and a standard ordinary roller chain conveyor chain 4.5; the chain track plate 4.2 is movably connected to the standard ordinary roller chain conveyor chain 4.5 through a standard roller chain pin to form a closed loop; under the drive of the conveyor chain motor 4.4, the chain track plate 4.2 reciprocates along the Y-axis on the guide rail key 4.3.

[0037] It should be further explained that the conveyor chain 4 is used to transport the rows of products released from the hydraulic aggregate lever 3 along the Y-axis.

[0038] like Figure 6 As shown, it should be noted that the hydraulic alignment device 5 includes a second hydraulic cylinder 5.1, an alignment push plate 5.2, a transverse guide rod 5.3, and a guide support 5.4; the alignment push plate 5.2 is bolted to the second hydraulic cylinder 5.1 and the transverse guide rod 5.3 by a first hexagon socket screw; the transverse guide rod 5.3 and the guide support 5.4 form a sliding fit, and under the drive of the second hydraulic cylinder 5.1, the alignment push plate 5.2 reciprocates along the X-axis.

[0039] It should be further explained that the hydraulic alignment device 5 is used to precisely align the tail ends of the rows of genuine products conveyed by the conveyor chain 4.

[0040] like Figure 7 As shown, it should be noted that the pneumatic self-righting pusher plate 6 includes a second cylinder 6.1, a self-righting plate 6.2, a second pushing trolley 6.3, a second pushing guide rail 6.4, and a fifth pin 6.5; the self-righting plate 6.2 is hingedly connected to the second pushing trolley 6.3 through the fifth pin 6.5; the front end stop 6.6 of the pushing trolley is set at the top of the second pushing guide rail 6.4; the second pushing trolley 6.3 reciprocates along the Y-axis within the second pushing guide rail 6.4 under the drive of the second cylinder 6.1.

[0041] It should be further explained that the pneumatic self-righting pusher plate 6 is used to transport the precisely aligned rows of genuine products along the Y-axis to the pneumatic guide plate 7.

[0042] It should be further explained that when an external force is applied from the back to cause the self-righting plate 6.2 to fall, the self-righting plate 6.2 remains upright when no external force is applied due to the counterweight. The front stop block 6.6 of the second pusher trolley 6.3 is used to ensure that the self-righting plate 6.2 remains upright when the front is subjected to force.

[0043] like Figure 8 As shown, it should be noted that the pneumatic guide plate 7 includes a third cylinder 7.1, a guide plate carriage 7.2, a third pusher rail 7.3, and a sixth pin 7.4; the guide plate carriage 7.2 is movably connected to the third cylinder 7.1 through the sixth pin 7.4; the guide plate carriage 7.2 reciprocates along the Y-axis within the third pusher rail 7.3 under the drive of the third cylinder 7.1.

[0044] It should be further explained that the pneumatic guide plate 7 is used to transfer the acquired rows of genuine products to the hydraulic lifting and palletizing platform 8.

[0045] like Figure 9 As shown, it should be noted that the hydraulic lifting palletizing platform 8 includes a buffer platform 8.1, a lifting guide rod 8.2, a lifting guide seat 8.3, and a third hydraulic cylinder 8.4; the buffer platform 8.1 is bolted to the lifting guide rod 8.2 and the third hydraulic cylinder 8.4 by a second hexagon socket screw 8.5; the lifting guide rod 8.2 and the lifting guide seat 8.3 form a sliding fit; the buffer platform 8.1 reciprocates along the Z-axis under the drive of the third hydraulic cylinder 8.4.

[0046] It should be further explained that the hydraulic lifting palletizing platform 8 is used to collect rows of genuine products one by one, and form the required stack by moving along the Z-axis.

[0047] like Figure 10As shown, it should be noted that the palletizing and packaging conveying flat roller 9 includes a conveying flat roller 9.1, a second drive chain 9.2, and a flat roller motor 9.3; the flat roller motor 9.3 realizes the centralized transmission of multiple conveying flat rollers 9.1 through the second drive chain 9.2.

[0048] It should be further explained that the palletizing and packing conveyor roller 9 is used to transport the palletized packages along the X-axis to the automatic baler 16 for baling.

[0049] like Figure 11 As shown, it should be noted that the passive guide roller 10 includes a fixed roller 10.1, an adjustable roller 10.2, and a lead screw and nut transverse movement screw mechanism 10.3; the lead screw and nut transverse movement screw mechanism 10.3 controls the adjustable roller 10.2 to be adjusted along the Y-axis.

[0050] It should be further explained that the passive guide roller 10 is used to guide the stack of packages during the conveying process.

[0051] like Figure 12 As shown, it should be noted that the V-shaped roller conveyor 11 for collecting repaired and waste products includes a second V-shaped roller 11.1, a third drive chain 11.2, and a second roller conveyor motor 11.3; the second roller conveyor motor 11.3 drives the two second V-shaped rollers 11.1 through the third drive chain 11.2.

[0052] It should be noted that the V-shaped roller conveyor 11 for collecting repaired and defective products is used to transport the sorted repaired and defective products along the X-axis.

[0053] It should be noted that the bidirectional feeding device 12 is used to transport the repaired products and waste products after secondary sorting along the Y-axis to the repaired product collection tank 14 and the waste product collection tank 15, respectively; the repaired product collection tank 14 is used to collect the repaired products; the waste product collection tank 15 is used to collect the waste products; and the fixed stop head 13 is used to stop the conveying of the repaired products and waste products.

[0054] In this specific embodiment, the effective load of multiple sets of air cylinders and multiple sets of hydraulic cylinders can meet the stacking requirements of large cold-formed steel square and rectangular tubes with a single cold-formed steel section weighing 2 tons and a total stack weight of 10 tons.

[0055] It should be noted that the bidirectional feeding device 12 and the automatic bundling machine 16 are existing technologies; the fixed stop head 13, the repair collection trough 14, and the waste collection trough 15 are welded using ordinary square and rectangular tubes, forming an ordinary steel structure frame.

[0056] An automatic sorting and palletizing method for large cold-formed square and rectangular steel tubes utilizing an automatic sorting and palletizing system includes an automatic sorting process, an automatic palletizing process, and an automatic collection process for repaired and scrap products; wherein, for example... Figure 13 As shown, the automated sorting process includes the following steps: S100. The upstream system sends a signal to the ECU.

[0057] S200. Analyze the signals sent from the upstream system to the ECU to obtain the attributes of the downstream products.

[0058] S300. Determine the attributes of the downstream products, and then perform the following steps: When the automatic sorting and palletizing system for large cold-formed steel square and rectangular tubes receives a genuine product arrival signal, it executes the genuine product sorting process.

[0059] When the automatic sorting and palletizing system for large cold-formed steel square and rectangular tubes receives a signal indicating that repaired or scrap products are being received, it will automatically collect the repaired and scrap products.

[0060] It should be noted that the automated sorting process is used to sort genuine products, repaired products, and defective products.

[0061] It should be noted that, as Figure 14 As shown, the genuine product sorting process includes the following steps: Sa310. Start the tail alignment V-shaped roller conveyor 1, and simultaneously stop the repair and waste collection V-shaped roller conveyor 11.

[0062] Sa320. Genuine product is conveyed along the X-axis by V-shaped roller conveyor 1 with tail alignment.

[0063] Sa330. When the genuine product tube head enters the through-beam photoelectric sensor 1.3, the through-beam photoelectric sensor 1.3 starts working and acquires the product entry signal.

[0064] Sa340. When the tube tail leaves the through-beam photoelectric sensor 1.3, the through-beam photoelectric sensor 1.3 acquires the signal for the second time.

[0065] Sa350. Through-beam photoelectric sensor 1.3 sends a stop signal to the ECU, indicating that the tail of the V-shaped roller conveyor 1 is aligned.

[0066] Sa360. Based on the preset shutdown delay, the genuine product tube tail will stop at the preset position.

[0067] Sa370. Enter the automatic palletizing process in the first zone S1.

[0068] It should be noted that, as Figure 15 As shown, the automated collection process for repaired and scrap products includes the following steps: Sb310. Start the tail alignment V-shaped roller conveyor 1 and the repair and waste collection V-shaped roller conveyor 11; at the same time, turn off the through-beam photoelectric sensor 1.3.

[0069] Sb320. Repaired or scrap materials are conveyed along the X-axis into the second area S2 via the tail-aligned V-shaped roller conveyor 1.

[0070] Sb330. The V-shaped roller conveyor 11 for collecting repaired and scrap materials transports the incoming materials to the fixed stop 13 and stops them.

[0071] Sb340. Start the bidirectional material feeding device 12 and execute the repair and scrap collection sub-process according to the attributes of the off-line products obtained by the ECU.

[0072] It needs to be further explained that, such as Figure 16 As shown, the sub-process for collecting repaired and scrap products includes the following steps: Sb341. Determine whether the product being shipped is a repaired product or a defective product, and perform the following operations based on the determination result: When the incoming material is a repair product, the bidirectional feeding device 12 feeds the material along the Y-axis to the repair product collection tank 14.

[0073] When the incoming material is scrap, the bidirectional feeding device 12 feeds the material to the scrap collection tank 15 in the opposite direction of the Y-axis.

[0074] It should be noted that, as Figure 17 As shown, the automated palletizing process includes the following steps: Sc100. Genuine incoming materials are coarsely aligned via the V-shaped roller conveyor 1 at the tail end.

[0075] The first cylinder 2.1 of the pneumatic pusher 2 drives the first pusher trolley 2.2 to push the incoming material along the Y-axis onto the pallet frame 3.3 of the hydraulic collecting lever 3.

[0076] Sc300. When the number of genuine incoming materials collected by the hydraulic collecting lever 3 reaches the preset number of materials required for one row of stacked packages, the first hydraulic cylinder 3.2 of the hydraulic collecting lever 3 drives the pallet frame 3.3 to descend.

[0077] Sc400. After a row of genuine products falls onto the chain tray 4.2, the conveyor chain motor 4.4 drives the standard ordinary roller chain conveyor chain 4.5 and the row of genuine products on the chain tray 4.2 to be conveyed along the Y-axis through the first drive chain 4.1.

[0078] Sc500. A row of genuine products is conveyed to the pneumatic self-righting push plate 6. When a row of genuine products touches the self-righting plate 6.2, it falls down due to external force, allowing the row of genuine products to pass smoothly. After the row of genuine products has passed through the self-righting plate 6.2, the self-righting plate 6.2 returns to a vertical state due to its own counterweight.

[0079] When a row of genuine products continues to be conveyed to the hydraulic alignment device 5, the conveyor chain 4 stops; the standard ordinary roller chain conveyor chain 4.5 of the conveyor chain 4 returns in the negative direction along the Y axis; after the row of genuine products returns with the standard ordinary roller chain conveyor chain 4.5, it is blocked from the opposite direction by the tumbler plate 6.2; the second hydraulic cylinder 5.1 of the standard ordinary roller chain conveyor chain 4.5 pushes the alignment push plate 5.2 along the X axis to achieve precise alignment of the tail of the row of genuine products.

[0080] The third cylinder 7.1 of the pneumatic guide plate 7 drives the pneumatic guide plate 7 carriage to fully extend along the Y-axis; the second cylinder 6.1 of the pneumatic self-righting push plate 6 drives the self-righting plate 6.2 along the Y-axis to push a row of genuine incoming materials onto the extended pneumatic guide plate 7 carriage.

[0081] Sc800. The guide plate trolley 7.2 returns; after the guide plate trolley 7.2 has fully returned, a row of genuine incoming materials falls onto the buffer platform 8.1 of the hydraulic lifting palletizing platform 8.

[0082] Sc900. The second cylinder 6.1 drives the tumbler plate to return; then the third hydraulic cylinder 8.4 drives the hydraulic lifting and palletizing platform 8 to descend along the Z-axis by one product height.

[0083] Sc1000. Repeat Sc100 to Sc1000 until the preset number of layers required for bundling is reached and the preset standard requirements are met to form a complete stack of bundling, and then execute Sc1100.

[0084] Sc1100. The third hydraulic cylinder 8.4 drives the buffer platform 8.1 to descend below the palletizing and packing conveyor roller 9.

[0085] After the entire stack of packages is lowered onto the palletizing and packing conveyor roller 9, the passive guide roller 10 is adjusted to the preset range according to the width of the stack of packages.

[0086] The Sc1300 flat roller motor 9.3 drives the conveyor flat roller 9.1 through the second drive chain to convey the stack of bales along the X-axis to the automatic baler 16 for baling under the guidance of the passive guide vertical roller 10.

[0087] It should be noted that during continuous production, step Sc100 can achieve coarse alignment of the tail of all genuine products.

[0088] In this specific embodiment, the coarse alignment deviation in step Sc100 is less than or equal to 10 mm.

[0089] In this specific embodiment, the fine alignment deviation in step Sc600 is less than or equal to 1 mm.

[0090] In the above detailed description, various features are combined together in a single embodiment to simplify this disclosure. This approach to disclosure should not be construed as reflecting an intention that embodiments of the claimed subject matter require more features than are explicitly stated in each claim. Rather, as reflected in the appended claims, the invention is presented with fewer features than all of the features of the single disclosed embodiment. Therefore, the appended claims are hereby explicitly incorporated into the detailed description, wherein each claim stands alone as a preferred embodiment of the invention.

[0091] The disclosed embodiments have been described above to enable any person skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein can be applied to other embodiments without departing from the spirit and scope of this disclosure. Therefore, this disclosure is not limited to the embodiments given herein, but is consistent with the broadest scope of the principles and novel features disclosed in this application.

[0092] The foregoing description includes examples of one or more embodiments. It is certainly impossible to describe all possible combinations of components or methods in order to describe the above embodiments, but those skilled in the art will recognize that further combinations and arrangements of the various embodiments are possible. Therefore, the embodiments described herein are intended to cover all such changes, modifications, and variations that fall within the scope of the appended claims. Furthermore, the term "comprising" as used in the specification or claims is interpreted in a manner similar to the term "including," as interpreted when used as a conjunction in the claims. Additionally, the use of any term "or" in the specification of the claims is intended to mean "non-exclusive or."

[0093] The specific embodiments described above further illustrate the purpose, technical solution, and beneficial effects of the present invention. It should be understood that the above description is only a specific embodiment of the present invention and is not intended to limit the scope of protection of the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. An automatic sorting and palletizing system for large cold-formed steel square and rectangular tubes, characterized in that: It includes a first area (S1) for automatic palletizing of genuine products, a second area (S2) for collecting repaired and defective products, and a real coordinate system, wherein: The true coordinate system takes the starting point of the large cold-formed steel square and rectangular tube automatic sorting and palletizing system as the origin, the axis extending laterally from left to right along the horizontal plane as the X-axis, the axis extending longitudinally from inside to outside along the horizontal plane as the Y-axis, and the axis extending from bottom to top perpendicular to the horizontal plane as the Z-axis. The first area (S1) includes a tail-aligned V-shaped roller conveyor (1), a pneumatic pusher (2), a hydraulic material collection lever (3), a conveyor chain (4), a hydraulic alignment device (5), a pneumatic tumbler pusher (6), a pneumatic guide plate (7), a hydraulic lifting palletizing platform (8), a palletizing and packaging conveying flat roller (9), and a passive guide vertical roller (10). The second area (S2) includes a V-shaped roller conveyor (11) for collecting repaired and scrap products, a bidirectional feeding device (12), a fixed stop (13), a repaired product collection trough (14), and a scrap collection trough (15). The tail-aligned V-shaped roller conveyor (1), the pneumatic pusher (2), the hydraulic collecting lever (3), and the starting ends of the conveyor chain (4) are arranged in parallel and spaced from left to right along the X-axis. The end of the conveyor chain (4), the hydraulic pusher (5), the pneumatic tumbler pusher (6), the pneumatic guide plate (7), the hydraulic lifting palletizing platform (8), the palletizing and packing conveyor roller (9), and the passive guide vertical roller (10) are arranged in parallel and spaced from the inside to the outside along the Y-axis. The V-shaped roller conveyor (11) for collecting repaired and waste products and the bidirectional feeding device (12) are arranged in parallel intervals from left to right along the X-axis. The repair product collection tank (14), the bidirectional feeding device (12), and the waste product collection tank (15) are arranged in parallel from the outside to the inside along the Y-axis. The fixed stop (13) is at the very end of the V-shaped roller conveyor (11) for collecting repaired and scrap products.

2. The automatic sorting and palletizing system for large cold-formed steel square and rectangular tubes according to claim 1, characterized in that: The tail-aligned V-shaped roller conveyor (1) includes a single-drive V-shaped roller (1.1) and a first roller conveyor motor (1.2). The first single-drive V-shaped roller (1.1) at the entrance of the large cold-formed steel square and rectangular tube automatic sorting and palletizing system is equipped with through-beam photoelectric sensors (1.3) on both sides. The pneumatic pusher (2) includes a first cylinder (2.1), a first pusher trolley (2.2), a first pusher guide rail (2.3), and a first pin (2.4); the first cylinder (2.1) is movably connected to the first pusher trolley (2.2) through the first pin (2.4); the first pusher trolley (2.2) reciprocates along the Y-axis within the first pusher guide rail (2.3) under the drive of the first cylinder (2.1); The hydraulic material collection lever (3) includes a hydraulic cylinder support (3.1), a first hydraulic cylinder (3.2), a pallet frame (3.3), a pallet support (3.4), a second pin (3.5), a third pin (3.6), and a fourth pin (3.7). The hydraulic cylinder support (3.1) is hinged to the first hydraulic cylinder (3.2) via the second pin (3.5). The first hydraulic cylinder (3.2) is hinged to the pallet frame (3.3) via the third pin (3.6). The pallet frame (3.3) is hinged to the pallet support (3.4) via the fourth pin (3.7). The pallet frame (3.3) swings up and down around the fourth pin (3.7) under the drive of the first hydraulic cylinder (3.2). The conveyor chain (4) includes a first drive chain (4.1), a chain track plate (4.2), a guide rail key (4.3), a conveyor chain motor (4.4), and a standard ordinary roller chain conveyor chain (4.5). The chain track plate (4.2) is movably connected to the standard ordinary roller chain conveyor chain (4.5) through a standard roller chain pin to form a closed loop. Under the drive of the conveyor chain motor (4.4), the chain track plate (4.2) reciprocates along the Y-axis on the guide rail key (4.3).

3. The automatic sorting and palletizing system for large cold-formed steel square and rectangular tubes according to claim 2, characterized in that: The hydraulic alignment device (5) includes a second hydraulic cylinder (5.1), an alignment push plate (5.2), a transverse guide rod (5.3), and a guide support (5.4). The alignment push plate (5.2) is bolted to the second hydraulic cylinder (5.1) and the transverse guide rod (5.3) by a first hexagon socket screw. The transverse guide rod (5.3) and the guide support (5.4) form a sliding fit. Under the drive of the second hydraulic cylinder (5.1), the alignment push plate (5.2) reciprocates along the X-axis. The pneumatic self-righting pusher plate (6) includes a second cylinder (6.1), a self-righting plate (6.2), a second pushing trolley (6.3), a second pushing guide rail (6.4), and a fifth pin (6.5); the self-righting plate (6.2) is hingedly connected to the second pushing trolley (6.3) through the fifth pin (6.5); the front end stop (6.6) of the pushing trolley is located at the top of the second pushing guide rail (6.4); the second pushing trolley (6.3) reciprocates along the Y-axis within the second pushing guide rail (6.4) under the drive of the second cylinder (6.1); The pneumatic guide plate (7) includes a third cylinder (7.1), a guide plate carriage (7.2), a third pusher rail (7.3), and a sixth pin (7.4); the guide plate carriage (7.2) is movably connected to the third cylinder (7.1) through the sixth pin (7.4); the guide plate carriage (7.2) reciprocates along the Y-axis within the third pusher rail (7.3) under the drive of the third cylinder (7.1); The hydraulic lifting palletizing platform (8) includes a buffer platform (8.1), a lifting guide rod (8.2), a lifting guide seat (8.3), and a third hydraulic cylinder (8.4). The buffer platform (8.1) is bolted to the lifting guide rod (8.2) and the third hydraulic cylinder (8.4) by a second hexagon socket screw (8.5). The lifting guide rod (8.2) and the lifting guide seat (8.3) form a sliding fit. The buffer platform (8.1) reciprocates along the Z-axis under the drive of the third hydraulic cylinder (8.4). The palletizing and packaging conveying roller (9) includes a conveying roller (9.1), a second drive chain (9.2), and a roller motor (9.3); the roller motor (9.3) realizes the centralized transmission of multiple conveying rollers (9.1) through the second drive chain (9.2); The passive guide roller (10) includes a fixed roller (10.1), an adjustable roller (10.2), and a lead screw and nut transverse spiral mechanism (10.3); the lead screw and nut transverse spiral mechanism (10.3) controls the adjustable roller (10.2) to be adjusted along the Y-axis.

4. The automatic sorting and palletizing system for large cold-formed steel square and rectangular tubes according to claim 3, characterized in that: The V-shaped roller conveyor (11) for collecting repaired and waste products includes a second V-shaped roller (11.1), a third drive chain (11.2), and a second roller conveyor motor (11.3); the second roller conveyor motor (11.3) drives the two second V-shaped rollers (11.1) through the third drive chain (11.2).

5. A method for automatically sorting and stacking large cold-formed steel square and rectangular tubes using the automatic sorting and stacking system for large cold-formed steel square and rectangular tubes as described in claim 4, characterized in that: It includes an automated sorting process, an automated palletizing process, and an automated collection process for repaired and waste products; wherein, the automated sorting process includes the following steps: S100. The upstream system sends a signal to the ECU; S200. Analyze the signals sent from the upstream system to the ECU to obtain the attributes of the downstream products; S300. Determine the attributes of the downstream products, and then perform the following steps: When the large cold-formed steel square and rectangular tube automatic sorting and palletizing system receives a genuine product arrival signal, it executes the genuine product sorting process. When the large cold-formed steel square and rectangular tube automatic sorting and palletizing system receives a signal for the arrival of repaired or scrap products, it executes the automatic collection process for repaired and scrap products.

6. The method for automatic sorting and stacking of large cold-formed steel square and rectangular tubes according to claim 5, characterized in that: The genuine product sorting process includes the following steps: Sa310. Start the tail alignment V-shaped roller conveyor (1) and simultaneously stop the repair and waste collection V-shaped roller conveyor (11). Sa320. The genuine product is conveyed along the X-axis via the tail-aligned V-shaped roller conveyor (1); Sa330. When the genuine product tube head enters the through-beam photoelectric sensor (1.3), the through-beam photoelectric sensor (1.3) starts working and acquires the product entry signal; Sa340. When the tube tail leaves the through-beam photoelectric sensor (1.3), the through-beam photoelectric sensor (1.3) acquires a signal for the second time; Sa350. The through-beam photoelectric sensor (1.3) sends a stop signal to the ECU for the tail-aligned V-shaped roller conveyor (1); Sa360. Based on the preset shutdown delay, stop the genuine tube tail at the preset position; Sa370. Enter the automated palletizing process in the first area (S1).

7. The method for automatic sorting and stacking of large cold-formed steel square and rectangular tubes according to claim 6, characterized in that: The automated collection process for repaired and defective products includes the following steps: Sb310. Start the tail alignment V-shaped roller conveyor (1) and the repair and waste collection V-shaped roller conveyor (11); at the same time, turn off the through-beam photoelectric sensor (1.3). Sb320. Repaired or scrap materials are conveyed along the X-axis into the second region (S2) via the tail-aligned V-shaped roller conveyor (1); Sb330. The repair and waste collection V-shaped roller conveyor (11) transports the repair or waste materials to the fixed stop (13) and stops them. Sb340. Start the bidirectional material feeding device (12) and execute the repair and waste collection sub-process according to the attributes of the off-line products obtained by the ECU.

8. The method for automatic sorting and stacking of large cold-formed steel square and rectangular tubes according to claim 7, characterized in that: The sub-process for collecting repaired and waste products includes the following steps: Sb341. Determine whether the product being shipped is a repaired product or a defective product, and perform the following operations based on the determination result: When the incoming material is a repair product, the bidirectional feeding device (12) feeds the incoming material along the Y-axis to the repair product collection trough (14). When the incoming material is scrap, the bidirectional feeding device (12) feeds the incoming material in the opposite direction of the Y-axis to the scrap collection trough (15).

9. The method for automatic sorting and stacking of large cold-formed steel square and rectangular tubes according to claim 8, characterized in that: The automated palletizing process includes the following steps: Sc100. The genuine incoming material is coarsely aligned via the tail alignment V-shaped roller conveyor (1); Sc200. The first cylinder (2.1) of the pneumatic pusher (2) drives the first pusher trolley (2.2) to push the incoming material along the Y-axis onto the pallet frame (3.3) of the hydraulic collecting lever (3); Sc300. When the number of genuine incoming materials collected by the hydraulic collecting lever (3) reaches the preset number of materials required for a row of stacked packages, the first hydraulic cylinder (3.2) of the hydraulic collecting lever (3) drives the pallet frame (3.3) to descend; Sc400. After a row of genuine incoming materials falls onto the chain tray (4.2), the conveyor chain motor (4.4) drives the standard ordinary roller chain conveyor chain (4.5) and the row of genuine incoming materials on the chain tray (4.2) to be conveyed along the Y-axis through the first drive chain (4.1); Sc500. A row of genuine products is conveyed to the pneumatic self-righting push plate (6); when the row of genuine products touches the back of the self-righting plate (6.2), the self-righting plate (6.2) falls down due to external force, allowing the row of genuine products to pass smoothly; when the row of genuine products has all passed the self-righting plate (6.2), the self-righting plate (6.2) returns to a vertical state; Sc600. When a row of genuine products continues to be conveyed to the hydraulic alignment device (5), the conveyor chain (4) stops; the standard ordinary roller chain conveyor chain (4.5) of the conveyor chain (4) returns in the negative direction along the Y axis; after the row of genuine products returns with the standard ordinary roller chain conveyor chain (4.5), it is blocked from the opposite direction by the tumbler plate (6.2); the standard ordinary roller chain conveyor chain (4.5) continues to return unloaded until it stops at the starting point; the second hydraulic cylinder (5.1) of the hydraulic alignment device (5) pushes the alignment push plate (5.2) along the X axis to achieve precise alignment of the tail of the row of genuine products; Sc700. The third cylinder (7.1) of the pneumatic guide plate (7) drives the pneumatic guide plate trolley (7.2) to fully extend along the Y-axis; the second cylinder (6.1) of the pneumatic tumbler pusher (6) drives the tumbler plate (6.2) along the Y-axis to push a row of positive incoming materials onto the extended pneumatic guide plate trolley (7.2); Sc800. The guide plate trolley (7.2) returns; after the guide plate trolley (7.2) has fully returned, a row of genuine incoming materials falls onto the buffer platform (8.1) of the hydraulic lifting palletizing platform (8); Sc900. The second cylinder (6.1) drives the tumbler plate (6.2) to return; then the third hydraulic cylinder (8.4) drives the hydraulic lifting palletizing platform (8) to descend along the Z-axis by one product height; Sc1000. Repeat Sc100 to Sc1000 until the preset number of layers required for bundling is reached and the preset standard requirements are met to form a complete stack of bundling, and then execute Sc1100; Sc1100. The third hydraulic cylinder (8.4) drives the buffer platform (8.1) to descend below the palletizing and packing conveyor roller (9); After the entire stack of packages is lowered onto the palletizing and packing conveyor roller (9), the passive guide roller (10) is adjusted to a preset range in advance according to the width of the stack of packages; Sc1300. The flat roller motor (9.3) drives the conveying flat roller (9.1) through the second drive chain (9.2) to convey the stack of bales along the X-axis to the automatic baler (16) for baling under the guidance of the passive guide vertical roller (10).

10. The method for automatic sorting and stacking of large cold-formed steel square and rectangular tubes according to claim 9, characterized in that: The coarse alignment deviation in step Sc100 is less than or equal to 10 mm; The fine alignment deviation in step Sc600 is less than or equal to 1 mm.

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