Double-station automatic bundling machine for hot-rolled narrow strip steel thick bundle belt

Abstract

This invention relates to a dual-station automatic bundling machine for thick hot-rolled narrow strip steel, belonging to the field of packaging machinery technology. It includes a left position adjustment device and a right position adjustment device, which are arranged along the center line of the equipment. Two strapping processing devices are symmetrically arranged at the upper end of the left position adjustment device. This dual-station automatic bundling machine for thick hot-rolled narrow strip steel, through its symmetrical dual-station process arrangement, can uniformly bundle multiple steel coils along the coil axis with two straps in one operation, eliminating the need for rotation and secondary bundling. Simultaneously, it adopts an integrated guide channel to reduce cross-joints, improving the discontinuous, independent, and easily jammed multi-segment strapping channels into a continuous, integrated, and unobstructed integrated guide channel. It can also clean curved edges, burrs, and flash generated during strapping slitting, reducing jamming during strapping operation, improving bundling efficiency and quality, and meeting the requirements for on-site online automatic continuous bundling operations.

Description

Technical Field

[0001] This invention relates to the field of packaging machinery technology, specifically to a dual-station automatic bundling machine for hot-rolled narrow strip steel with thick strapping. Background Technology

[0002] In hot-rolled narrow strip steel production enterprises, bundling machines are used for packaging finished steel coils to prevent them from unraveling during transportation and loading / unloading. Bundling methods include circumferential bundling and axial (through-the-core) bundling. Circumferential bundling involves attaching one strap to each coil along its circumference, while axial bundling involves attaching 2-3 steel straps evenly along the axial direction from the outer diameter to the inner diameter of multiple coils. This is an important step in the packaging of finished steel coils.

[0003] Currently, the bundling method used in the production of hot-rolled narrow strip steel in China is mainly to cut ordinary carbon steel strips with a thickness of 2-4mm and a width of 40-50mm from hot-rolled strip steel. Its advantages are that the steel strip has good toughness, high strength, and low material cost, which meets the requirements of use. Its disadvantage is that most of the time it is done manually, which results in high labor intensity for workers and low bundling efficiency.

[0004] The automatic axial bundling technology for multiple coils of hot-rolled narrow strip steel with thick strapping was developed by Qinhuangdao Xizhong Institute Yanda Heavy Machinery Research Institute Co., Ltd. (Yanda Branch of China Heavy Machinery Research Institute Co., Ltd.). The invention is named "Hot-rolled Narrow Strip Steel Multiple Coil Bundling Machine" and has the invention patent number ZL201210052200.2. This invention discloses an automatic bundling machine for multiple coils of hot-rolled narrow strip steel, including a frame, platform, guardrails, a bundling tape heating mechanism, a strapping and bundling mechanism, an automatic welding mechanism, a traveling trolley, a hydraulic pump station, and an electrical control unit. The platform is fixed on the frame and is equipped with guardrails. This invention has been tested in the field and has the advantages of improving bundling quality, reducing the labor intensity of workers, and improving the working environment of workers.

[0005] Application No. 202011305497.X discloses a hot-rolled narrow strip steel multi-coil bundling machine, including a platform and a transverse track set on the platform. An uncoiler is provided on the right side of the platform. A coil transport trolley with steel coil support rollers mounted on it is provided on a longitudinal track configured with the platform. A coil threading trolley is located on the left side and a trolley is located on the right side on the transverse track. The coil threading trolley is equipped with a coil threading trolley drive mechanism. The trolley is equipped with a trolley positioning hydraulic cylinder. A strapping bending mechanism, a strapping head clamping mechanism, and a follower chassis are provided on the trolley. The follower chassis is equipped with a two-roller clamping mechanism, a clamping roller straightening mechanism, a strapping shearing and bending mechanism, an electromechanical limit switch, and a welding machine.

[0006] The above two inventions can replace manual bundling, and the degree of automation, quality, and speed of bundling are all improved to a certain extent. However, they still have serious shortcomings: 1. The bundling process of the above technologies requires the high-temperature steel coil to rotate 180° before secondary bundling, and the rotating equipment has a complex structure; 2. The secondary bundling efficiency is low. Although various measures have been taken to improve efficiency, the steel coil rotation and secondary bundling process limit the improvement of production efficiency and cannot meet the ever-increasing demands of modern continuous production; 3. The equipment lacks necessary adjustment means. When the center height of the steel coil changes, it cannot be adjusted adaptively, resulting in the bundling machine and the steel coil bundle being out of concentricity. This leads to unstable welding quality of the bundling tape overlap joints and makes it impossible to achieve online continuous production; 4. The equipment reliability is poor. The intermittent tape threading method used in the above technologies is prone to tape threading jams, especially when the width of the steel coil bundle changes. That is, the strapping tape is easily blocked at the cross joints in the segmented tape threading channel, requiring the equipment to be stopped to deal with the blockage. This results in frequent equipment downtime and cannot meet the needs of continuous production on site. Summary of the Invention

[0007] To overcome the shortcomings of existing technologies in terms of bundling efficiency, equipment reliability, and structural design, this invention provides a dual-station automatic bundling machine for hot-rolled narrow strip steel with thick strapping. By adopting a new equipment structure and layout, it can quickly bundle two straps along the axial direction of the steel coil, meeting the needs of automated production on site and realizing online continuous automatic bundling production of hot-rolled narrow strip steel.

[0008] This invention is achieved through the following technical solution:

[0009] A hot-rolled narrow strip steel thick strapping double-station automatic strapping machine includes a left position adjustment device and a right position adjustment device, which are arranged along the center line of the equipment. Two strapping processing devices are symmetrically arranged at the upper end of the left position adjustment device. Strap head control devices are respectively arranged at the ends of the two strapping processing devices. Welding devices are respectively installed above the two strap head control devices. A bending device is arranged between the two welding devices. A strap threading device is installed at the top of the right position adjustment device, and the strapping channels of the bending device and the strap threading device are at the same horizontal height.

[0010] The bending device includes two symmetrically arranged clamping plates, and bending heads are fixedly connected to the ends of the two clamping plates respectively. One end of the bending device is installed on the symmetrical center line of the left position adjustment device through a bending base. The other end of the bending device is equipped with a centering cone sleeve, and strapping guide grooves are opened on both sides of the centering cone sleeve.

[0011] Furthermore, the left position adjustment device includes two left bases that are aligned, and a left frame is mounted on the upper end of the two left bases via a track slider. A height adjustment mechanism is mounted on each of the left frames, and the tops of the four height adjustment mechanisms are connected to a mounting beam.

[0012] A position measurement and control mechanism is installed on one side of each of the two left bases.

[0013] Furthermore, the guide channel of the strapping processing device is composed of a guide upper cover, a middle guide and a guide lower cover, and a guiding mechanism, a measuring and controlling mechanism, a clamping mechanism, a trimming mechanism and a straightening mechanism are arranged along the direction of the guide channel. A reset mechanism is arranged on one side of the straightening mechanism, a cutting mechanism is installed on one side of the reset mechanism, and a strap pressing mechanism is installed on the side wall of the middle guide.

[0014] Furthermore, the right position adjustment device includes two symmetrically arranged right bases, and a right frame is installed on the upper end of the two right bases via a track slider. A right height adjustment mechanism is installed on the upper end of the right frame, and the tops of the four right height adjustment mechanisms are connected to a right track beam.

[0015] A crank-slider mechanism is provided in the middle of the right frame, and a pressing mechanism is connected to the end of the right track beam.

[0016] Furthermore, the belt threading device includes a lower belt groove and an upper belt groove, and the sidewall of the lower belt groove is connected to the crank-slider mechanism;

[0017] The upper groove is provided with a four-bar linkage mechanism, the upper end of the side wall of the lower groove is equipped with a spring balancing mechanism, and the crank-slider mechanism allows the lower groove and the upper groove to slide together.

[0018] Furthermore, the lower groove is provided with three groove centering cones, one on the left, one in the middle, and one on the right, and all three groove centering cones are located at the front end of the lower groove.

[0019] A flattening mechanism is provided on the side wall of the lower groove, and multiple sets of roller mechanisms are installed at the bottom of the lower groove, with all of the roller mechanisms located on the right track beam.

[0020] Furthermore, the head control device includes a mounting base, a fixed jaw is slidably mounted on the end of the mounting base, a movable jaw is hinged on the fixed jaw, and a head detection mechanism is detachably connected to the upper end of the mounting base by multiple sets of bolts, and a detection switch and a control contact rod are provided on the head detection mechanism;

[0021] A clamping hydraulic cylinder is installed on the side wall of the mounting base, and the telescopic end of the clamping hydraulic cylinder is hinged to the movable jaw through an ear. A tensioning hydraulic cylinder is embedded in the end of the mounting base, and the telescopic end of the tensioning hydraulic cylinder is connected to the fixed jaw.

[0022] Furthermore, the welding device includes a welding machine base, and the welding machine base is fixedly installed on the upper end of the left position adjustment device. A shifting rail is fixedly connected to the welding machine base, and a shifting slider is slidably arranged on the shifting rail.

[0023] A shifting cylinder is provided through the side wall of the shifting track, and a spot welding clamping cylinder is embedded at the end of the shifting track. The shifting slider is used to drive the spot welding clamping cylinder through a spring mechanism.

[0024] Furthermore, a torsion crank is provided above the welding machine base. One end of the torsion crank is connected to the shifting slider, and the other end of the torsion crank is connected to a torsion shaft. A lower electrode is installed at the front end of the torsion shaft.

[0025] An upper electrode is fixedly connected to the piston rod of the spot welding clamping cylinder, and a spring and a pressure band sleeve are fitted on the upper electrode;

[0026] Both the lower and upper electrodes are made of a special copper alloy, and the lower electrode has a double-protrusion structure. Both the lower and upper electrodes are equipped with a forced circulation water cooling structure.

[0027] The beneficial effects of this invention are as follows:

[0028] This hot-rolled narrow strip steel thick strapping double-station automatic baling machine, through strapping height adjustment and symmetrical double-station process layout, can uniformly bind multiple steel coils along the coil axis with two straps in one go, reducing the number of baling passes and saving the time for rotation and secondary baling. At the same time, the integrated guide channel reduces cross-joints, improving the discontinuous, independent, and jam-prone multi-segment strapping channels into a continuous, integrated, and unobstructed integrated guide channel. It can also clean the curved edges, burrs, and flash generated during strapping slitting, reducing the jamming phenomenon during strapping operation, improving baling efficiency and baling quality, and meeting the needs of on-site online automatic continuous baling operations.

[0029] Other advantages, objectives, and features of the invention will be set forth in part in the description which follows, and in part will be apparent to those skilled in the art from the following examination, or may be learned from practice of the invention. The objectives and other advantages of the invention can be realized and obtained through the following description. Attached Figure Description

[0030] Figure 1 This is a schematic diagram of the isometric structure of the present invention;

[0031] Figure 2 This is a top view of the structure of the present invention;

[0032] Figure 3 This is a schematic diagram of the left position adjustment device of the present invention;

[0033] Figure 4 This is a schematic diagram of the strapping processing device of the present invention;

[0034] Figure 5 This is a schematic diagram of the right position adjustment device of the present invention;

[0035] Figure 6 This is a schematic diagram of the strap-threading device of the present invention;

[0036] Figure 7 This is a schematic diagram of the structure of the head control device of the present invention;

[0037] Figure 8 This is a schematic diagram of the bending device of the present invention;

[0038] Figure 9 This is a schematic diagram of the welding apparatus of the present invention;

[0039] Figure 10 This is a schematic diagram of the working state of the present invention.

[0040] In the diagram: 1. Left position adjustment device; 101. Left base; 102. Left frame; 103. Mounting beam; 104. Position measurement and control mechanism; 105. Height adjustment mechanism;

[0041] 2. Strapping processing device; 201. Guiding mechanism; 202. Measurement and control mechanism; 203. Clamping mechanism; 204. Trimming mechanism; 205. Straightening mechanism; 206. Reset mechanism; 207. Cutting mechanism; 208. Strapping pressing mechanism; 209. Upper guide cover; 210. Intermediate guide; 211. Lower guide cover;

[0042] 3. Right position adjustment device; 301. Right base; 302. Right frame; 303. Right track beam; 304. Crank-slider mechanism; 305. Rolling mechanism; 306. Right height adjustment mechanism;

[0043] 4. Threading device; 401. Four-bar linkage; 402. Lower groove; 403. Upper groove; 404. Spring balancing mechanism; 405. Grooved centering cone; 406. Flattening mechanism; 407. Roller mechanism;

[0044] 5. Head control device; 501. Fixed jaws; 502. Movable jaws; 503. Head detection mechanism; 504. Mounting base; 505. Clamping hydraulic cylinder; 506. Tensioning hydraulic cylinder;

[0045] 6. Bending device; 601. Strapping guide groove; 602. Pressure plate; 603. Bending head; 604. Bending base; 605. Centering cone sleeve;

[0046] 7. Welding device; 701. Lower electrode; 702. Pressure sleeve; 703. Upper electrode; 704. Torsion shaft; 705. Torsion crank; 706. Shift slider; 707. Shift track; 708. Spot welding clamping cylinder; 709. Shift cylinder; 710. Welding machine base. Detailed Implementation

[0047] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The components of the embodiments of the present invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0048] Therefore, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the invention without inventive effort are within the scope of protection of the invention.

[0049] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0050] In the above description of the present invention, it should be noted that the terms "one side," "the other side," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship in which the product of the invention is conventionally placed during use. These terms are used only for the convenience of describing the present invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the present invention. Furthermore, the terms "first," "second," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0051] Furthermore, terms such as "identical" do not imply that components must be absolutely identical; minor differences are permissible. The term "perpendicular" simply means that the positional relationship between components is more perpendicular than "parallel," not that the structure must be perfectly perpendicular; a slight tilt is acceptable.

[0052] Please see Figure 1 , Figure 2 , Figure 3and Figure 5 This invention provides a technical solution: a dual-station automatic bundling machine for hot-rolled narrow strip steel thick strapping, including a left position adjustment device 1 and a right position adjustment device 3, wherein heat-insulating protective covers (such as...) are installed on the left position adjustment device 1 and the right position adjustment device 3. Figure 10 As shown), the left position adjustment device 1 and the right position adjustment device 3 are arranged along the center line of the equipment. The left position adjustment device 1 includes two left bases 101 arranged in alignment. The upper ends of the two left bases 101 are equipped with left frames 102 via track sliders. The left frames 102 are equipped with height adjustment mechanisms 105 respectively. The tops of the four height adjustment mechanisms 105 are connected to the mounting beam 103. The side walls of the two left bases 101 are equipped with position measuring and control mechanisms 104 respectively. The right position adjustment device 3 includes two right bases 301 arranged symmetrically. The upper ends of the two right bases 301 are equipped with right frames 302 via track sliders. The upper ends of the right frames 302 are equipped with right height adjustment mechanisms 306 respectively. The tops of the four right height adjustment mechanisms 306 are connected to the right track beam 303. The middle of the two right frames 302 is equipped with a crank slider mechanism 304. The ends of the two right track beams 303 are connected to the pressing mechanism 305.

[0053] Reference Figure 4 Two strapping processing devices 2 are symmetrically arranged at the upper end of the left position adjustment device 1. The guide channel of the strapping processing device 2 is composed of a guide upper cover 209, a middle guide 210 and a guide lower cover 211. A guiding mechanism 201, a measuring and control mechanism 202, a clamping mechanism 203, a trimming mechanism 204 and a straightening mechanism 205 are arranged along the direction of the guide channel. A reset mechanism 206 is arranged on one side of the straightening mechanism 205. A cutting mechanism 207 is installed on one side of the reset mechanism 206. A strap pressing mechanism 208 is installed on the side wall of the middle guide 210.

[0054] Reference Figure 6 The top of the right position adjustment device 3 is equipped with a belt threading device 4, which includes a lower belt groove 402 and an upper belt groove 403. The side wall of the lower belt groove 402 is connected to the crank-slider mechanism 304. A four-bar linkage 401 is provided on the upper belt groove 403. A spring balancing mechanism 404 is installed on the upper end of the side wall of the lower belt groove 402. The crank-slider mechanism 304 allows the lower belt groove 402 and the upper belt groove 403 to slide together. Three belt groove centering cones 405 are respectively provided on the lower belt groove 402, and the three belt groove centering cones 405 are all located at the front end of the lower belt groove 402. A flattening mechanism 406 is provided on the side wall of the lower belt groove 402. Multiple sets of roller mechanisms 407 are installed at the bottom of the lower belt groove 402, and the multiple roller mechanisms 407 are all located on the right track beam 303.

[0055] Reference Figure 7Two strapping processing devices 2 are respectively provided with a strapping head control device 5 at their ends. The strapping head control device 5 includes a mounting base 504. A fixed jaw 501 is slidably mounted on the end of the mounting base 504. A movable jaw 502 is hinged on the fixed jaw 501. A strapping head detection mechanism 503 is detachably connected to the upper end of the mounting base 504 by multiple sets of bolts. The strapping head detection mechanism 503 is provided with a detection switch and a measurement and control contact rod. A clamping hydraulic cylinder 505 is installed on the side wall of the mounting base 504. The telescopic end of the clamping hydraulic cylinder 505 is hinged to the movable jaw 502 by an ear. A tensioning hydraulic cylinder 506 is embedded in the end of the mounting base 504. The telescopic end of the tensioning hydraulic cylinder 506 is connected to the fixed jaw 501.

[0056] Reference Figure 9 Welding devices 7 are installed above the two head control devices 5 respectively. The welding device 7 includes a welding machine base 710, and the welding machine base 710 is fixedly installed on the upper end of the left position adjustment device 1. A shifting track 707 is fixedly connected to the welding machine base 710. A shifting slider 706 is slidably arranged on the shifting track 707. A shifting cylinder 709 is provided through the side wall of the shifting track 707. A spot welding clamping cylinder 708 is embedded at the end of the shifting track 707. The shifting slider 706 is used to drive the spot welding clamping cylinder 708 through a spring mechanism.

[0057] In addition, a torsion crank 705 is provided above the welding machine base 710. One end of the torsion crank 705 is connected to the shift slider 706, and the other end of the torsion crank 705 is connected to the torsion shaft 704. The lower electrode 701 is installed at the front end of the torsion shaft 704. The upper electrode 703 is fixedly connected to the piston rod of the spot welding clamping cylinder 708. A spring and a pressure band sleeve 702 are sleeved on the upper electrode 703. Both the lower electrode 701 and the upper electrode 703 are made of special copper alloy material, and the lower electrode 701 adopts a double protrusion structure. The lower electrode 701 and the upper electrode 703 are jointly equipped with a forced circulation water cooling structure.

[0058] Reference Figure 8 A bending device 6 is provided between the two welding devices 7. The bending device 6 and the strapping channel of the threading device 4 are at the same horizontal height. The joint of the strapping channel D of the threading device 4 and the bending device 6 adopts a conical structure, which can reduce the resistance when inserting into the center hole of the steel coil and avoid jamming when the inner hole is loosened. The bending device 6 includes two symmetrically arranged pressure plates 602. The ends of the two pressure plates 602 are respectively fixedly connected to bending heads 603. One end of the bending device 6 is installed on the symmetrical center line of the left position adjustment device 1 through the bending base 604. The other end of the bending device 6 is equipped with a centering cone sleeve 605, and strapping guide grooves 601 are opened on both sides of the centering cone sleeve 605.

[0059] The working process of the hot-rolled narrow strip steel thick strapping dual-station automatic bundling machine of the present invention is as follows:

[0060] Baler standby state: Both the left position adjustment device 1 and the right position adjustment device 3 are in the retracted state. At this time, the drive devices of each device of the baler are in the reset state.

[0061] Bundling preparation: Bundled steel coils K, consisting of multiple coils, are transported to the working position by external conveying equipment and fixed firmly by positioning mechanism. The left position adjustment device 1 and the right position adjustment device 3 are adjusted and fixed according to the height grade corresponding to the specifications of the steel coils by manual assistance.

[0062] Specifically, the bundling operation begins:

[0063] Step 1 Closing: The left position adjustment device 1 and the right position adjustment device 3 move along the lower guide rail towards the steel coil bundle K under the drive of their respective horizontal hydraulic cylinders, and close with the left position adjustment device 1 as the positioning reference. The two centering cone holes of the strapping treatment device 2 and the centering cone sleeve 605 of the bending device 6 are respectively aligned with the three groove centering cones 405 of the lower groove 402 of the strapping device 4 to realize the closure of the baling machine equipment. At the same time, the strapping outlet of the strapping treatment device 2 is connected to the strapping channels on both sides of the strapping device 4, and the two middle strapping channels of the strapping device 4 are connected to the entrance of the strapping guide groove 601 of the bending device 6. Then, the hydraulic cylinder of the coiling mechanism 305 of the right position adjustment device 3 extends to close and press the multiple steel coil bundles K together. At this time, during the pressing process of the left position adjustment device 1, the lower electrode 701 of the welding device 7 is gradually pressed against the end face of the steel coil.

[0064] Step 2: Threading the Straps: After the steel coil bundle K is closed and tightened, the strapping tape D enters through the inlet of the strapping processing device 2. Under the combined action of traction and pushing by the drive mechanism, it passes through the guide channel composed of the upper guide cover 209, the intermediate guide 210, and the lower guide cover 211. After passing through the guide rollers of the guide mechanism 201, the detection rollers of the measurement and control mechanism 202, the clamping rollers of the clamping mechanism 203, the sorting rollers of the trimming mechanism 204, and the straightening rollers of the straightening mechanism 205, the strapping tape D undergoes traction and simple processing. After passing through the reset mechanism 206, the cutting mechanism 207, and the pressing mechanism 208, the strapping tape D enters the threading device 4 and is threaded through the upper tape groove 4. After being guided and turned by the guide channel formed by 03 and the lower belt groove 402, the strap enters the fixed jaw 501 and movable jaw 502 of the strap head control device 5 through the strap guide groove 601 of the bending device 6. When the strap head of the strap D touches the contact rod located in the clamp of the strap head control device 5, the contact rod rotates through a certain angle under the push of the strap head and triggers the strap head detection switch. The contact rod is lifted and self-locked under the action of the spring. The detection switch sends a strap head arrival signal, the drive motor of the clamping mechanism 203 in the strap processing device 2 stops, the strap D stops forward feeding, and the fixed jaw 501 and movable jaw 502 of the strap head control device 5 close to clamp the strap head of the strap D.

[0065] Step 3: Tightening: The piston rod of the hydraulic cylinder of the four-bar linkage 401 of the threading device 4 retracts, lifting the upper strip groove 403 along the guide rod of the spring balance mechanism 404 through the four-bar linkage 401. The inner wall of the guide channel of the threading device 4 opens, and the strapping D is in a free state in the guide channel. Then, the piston rod of the hydraulic cylinder of the flattening mechanism 406 of the threading device 4 extends, flattening the right side strapping D of the steel coil bundle K at the end of the steel coil bundle K. Subsequently, the piston rod of the tightening hydraulic cylinder 506 of the strapping control device 5 retracts, tightening the inner side strapping D of the steel coil bundle K against the inner hole side wall. At the same time, the drive motor of the clamping mechanism 203 of the strapping processing device 2 reverses, tightening the outer side strapping D of the steel coil bundle K. At this time, the strapping D forms three straight edges tightly surrounding the inner, outer and end faces of the steel coil bundle K, forming two right angles of the strapping D. Furthermore, steps 2 and 3 above can be performed completely synchronously for both sides of the steel coil bundle, or they can be performed sequentially.

[0066] Step 4 Bundling: The strapping mechanism 208 of the strapping treatment device 2 on the outside of the steel coil bundle K first presses the strapping D against the outer wall of the steel coil bundle K via a hydraulic cylinder. Then, the piston rod of the hydraulic cylinder of the cutting mechanism 207 extends and cuts the strapping D. The hydraulic cylinder of the cutting mechanism 207 continues to extend, and the bending roller fixed on the cutter pushes the strapping D and bends the tail of the strapping D by 90° before pressing it against the end of the steel coil bundle K, forming the third right angle of the strapping D and forming the lower layer of the lap joint. The head of the new strapping formed after the strapping is cut on the material side is reset to the guide channel under the action of the spring of the reset mechanism 206, ready for the next bundling operation. At the same time, the steel... After the hydraulic cylinder of the bending device 6 on the inner side of the coil bundle extends to the first position and stops, the two sets of clamping plates 602 arranged in opposite directions at 180° press the ends of the two straps D against the inner wall of the steel coil bundle K. Then the movable jaw 502 of the strap control device 5 opens, the ends of the straps D on the inner side of the steel coil bundle K are free, the piston rod of the tensioning hydraulic cylinder 506 retracts to the limit position, making room for the straps D to bend. Then the hydraulic cylinder of the bending device 6 continues to extend to the second position and stops. The two sets of two bending heads 603 arranged in opposite directions at 180° bend the ends of the straps D and press them against the end face of the steel coil, forming the fourth right angle of the straps D and forming the upper layer of the lap joint.

[0067] Step 5 Welding: In step 1, the lower electrode 701 of the welding device 7 is pre-pressed onto the end face of the steel coil. When the lap joint of the strapping D is formed, it is on top of the lower electrode 701, but it cannot be fully overlapped and adhered to the surface of the lower electrode 701. At this time, the shifting slider 706 of the welding device 7 is in the left welding position. After the lap joint of the strapping D is formed, the spot welding clamping cylinder 708 of the welding device 7 pushes the upper electrode 703 down to the lower electrode 701. At the same time, the spring action tightly presses the head and tail of the strap together to perform butt welding. After welding one point, the upper electrode 703 retracts. The shifting cylinder 709 moves the welding mechanism to the second welding position through the shifting slider 706 to perform secondary welding. After welding twice, the upper electrode 703 retracts to its original position. The shifting slider 706 continues to advance to the exit position and drives the lower electrode 701 out of the welded lap joint head by pushing the torsion shaft 704 through the torsion crank 705. Furthermore, the strapping on both sides can be welded simultaneously or sequentially and individually until the welding work is completed.

[0068] Step 6 Reset: After the D-lap joint of the strapping is welded, under the command of the control system, each of the above mechanisms, driven by the hydraulic cylinders, will return to the bundling preparation state in a certain order.

[0069] In the above description, "head" specifically refers to the front end of each strap D along the forward direction, while "tail" specifically refers to the rear end formed after each strap D is cut along the forward direction.

[0070] Through the above steps, the baler can simultaneously produce two straps when baling steel coils. The above steps constitute one work cycle, completing one baling operation. By repeating the above steps, continuous baling of steel coils can be achieved.

[0071] In summary, in the dual-station baling machine of the present invention, the two baling stations arranged on both sides of the center line of the equipment are respectively equipped with a strapping processing device 2, a strapping head control device 5, and a welding device 7. Furthermore, the strapping device 4 and the bending device 6 are symmetrical, which simplifies the two strapping operations of each steel coil bundle into one strapping operation, reduces the number of baling operations, eliminates the need for steel coil bundle transposition equipment, and saves transposition time and secondary baling time. In addition, it can clean the curved edges, burrs and flash generated during the slitting of the strapping, reduce the jamming of the strapping during the entire operation process, and meet the requirements of on-site online automatic continuous baling operation.

[0072] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all such modifications or substitutions should be covered within the scope of the claims of the present invention.

Claims

1. A hot-rolled narrow strip steel thick strapping double-station automatic bundling machine, comprising a left position adjustment device (1) and a right position adjustment device (3), characterized in that: The left position adjustment device (1) and the right position adjustment device (3) are arranged along the center line of the equipment. Two strapping processing devices (2) are symmetrically arranged at the upper end of the left position adjustment device (1). Strap head control devices (5) are respectively arranged at the ends of the two strapping processing devices (2). Welding devices (7) are respectively installed above the two strap head control devices (5). Bending devices (6) are arranged between the two welding devices (7). Strap threading devices (4) are installed at the top of the right position adjustment device (3). The strapping channels of the bending device (6) and the threading device (4) are at the same horizontal height. The bending device (6) includes two symmetrically arranged clamping plates (602), and bending heads (603) are fixedly connected to the ends of the two clamping plates (602). One end of the bending device (6) is installed on the symmetrical center line of the left position adjustment device (1) through a bending base (604). The other end of the bending device (6) is equipped with a centering cone sleeve (605), and the two sides of the centering cone sleeve (605) are aligned with strapping guide grooves (601).

2. The hot-rolled narrow strip steel thick strapping double-station automatic bundling machine according to claim 1, characterized in that: The left position adjustment device (1) includes two left bases (101) arranged in alignment. The upper ends of the two left bases (101) are equipped with a left frame (102) via a track slider. The left frame (102) is equipped with a height adjustment mechanism (105) respectively. The tops of the four height adjustment mechanisms (105) are connected to a mounting beam (103). Position measurement and control mechanisms (104) are installed on one side of each of the two left bases (101).

3. The hot-rolled narrow strip steel thick strapping double-station automatic bundling machine according to claim 1, characterized in that: The strapping processing device (2) has a guide channel consisting of a guide cover (209), a middle guide (210) and a guide cover (211). A guiding mechanism (201), a measurement and control mechanism (202), a clamping mechanism (203), a trimming mechanism (204) and a straightening mechanism (205) are provided along the direction of the guide channel. A reset mechanism (206) is provided on one side of the straightening mechanism (205). A cutting mechanism (207) is installed on one side of the reset mechanism (206). A pressing mechanism (208) is installed on the side wall of the middle guide (210).

4. The hot-rolled narrow strip steel thick strapping double-station automatic bundling machine according to claim 1, characterized in that: The right position adjustment device (3) includes two right bases (301) arranged symmetrically. The upper ends of the two right bases (301) are equipped with right frames (302) via track sliders. The upper ends of the right frames (302) are respectively equipped with right height adjustment mechanisms (306). The tops of the four right height adjustment mechanisms (306) are connected to the right track beam (303). A crank-slider mechanism (304) is provided in the middle of the right frame (302), and a pressing mechanism (305) is connected to the right track beam (303).

5. The hot-rolled narrow strip steel thick strapping double-station automatic bundling machine according to claim 4, characterized in that: The belt threading device (4) includes a lower belt groove (402) and an upper belt groove (403), and the side wall of the lower belt groove (402) is connected to the crank-slider mechanism (304); The upper groove (403) is provided with a four-bar linkage (401), the upper end of the side wall of the lower groove (402) is provided with a spring balancing mechanism (404), and the crank-slider mechanism (304) allows the lower groove (402) and the upper groove (403) to slide together.

6. The hot-rolled narrow strip steel thick strapping double-station automatic bundling machine according to claim 5, characterized in that: The lower groove (402) is provided with three grooved centering cones (405) respectively, and the three grooved centering cones (405) are all located at the front end of the lower groove (402); A flattening mechanism (406) is provided on the side wall of the lower groove (402), and multiple sets of roller mechanisms (407) are installed at the bottom of the lower groove (402), and multiple roller mechanisms (407) are all arranged on the right track beam (303).

7. The hot-rolled narrow strip steel thick strapping double-station automatic bundling machine according to claim 1, characterized in that: The head control device (5) includes a mounting base (504), a fixed jaw (501) is slidably mounted on the end of the mounting base (504), a movable jaw (502) is hinged on the fixed jaw (501), and a head detection mechanism (503) is detachably connected to the upper end of the mounting base (504) by multiple sets of bolts, and a detection switch and a control contact rod are provided on the head detection mechanism (503); A clamping hydraulic cylinder (505) is installed on the side wall of the mounting base (504), and the telescopic end of the clamping hydraulic cylinder (505) is hinged to the movable jaw (502) through an ear. A tensioning hydraulic cylinder (506) is embedded at the end of the mounting base (504), and the telescopic end of the tensioning hydraulic cylinder (506) is connected to the fixed jaw (501).

8. The hot-rolled narrow strip steel thick strapping double-station automatic bundling machine according to claim 1, characterized in that: The welding device (7) includes a welding machine base (710), and the welding machine base (710) is fixedly installed on the upper end of the left position adjustment device (1). A shifting track (707) is fixedly connected to the welding machine base (710), and a shifting slider (706) is slidably arranged on the shifting track (707). A shifting cylinder (709) is provided through the side wall of the shifting track (707), and a spot welding clamping cylinder (708) is embedded at the end of the shifting track (707). The shifting slider (706) is used to drive the spot welding clamping cylinder (708) through a spring mechanism.

9. The hot-rolled narrow strip steel thick strapping double-station automatic bundling machine according to claim 8, characterized in that: A torsion crank (705) is provided above the welding machine base (710). One end of the torsion crank (705) is connected to the shift slider (706), and the other end of the torsion crank (705) is connected to a torsion shaft (704). A lower electrode (701) is installed at the front end of the torsion shaft (704). An upper electrode (703) is fixedly connected to the piston rod of the spot welding clamping cylinder (708), and a spring and a pressure band sleeve (702) are sleeved on the upper electrode (703). Both the lower electrode (701) and the upper electrode (703) are made of special copper alloy, and the lower electrode (701) adopts a double-protrusion structure. Both the lower electrode (701) and the upper electrode (703) are equipped with a forced circulation water cooling structure.

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