Method and system for uncoiling a hot-rolled finished thin material scrap coil
By positioning and clamping the scrap steel coils with the tail end, combined with the slow descent of the unloading trolley and the reverse rotation of the coiler, the problem of tipping over during scrap steel coil unloading was solved, achieving a safe and efficient unloading process, reducing costs and maintaining production efficiency.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- BAOSTEEL ZHANJIANG IRON & STEEL CO LTD
- Filing Date
- 2026-03-02
- Publication Date
- 2026-06-02
AI Technical Summary
During the hot rolling process, scrap steel coils are prone to tipping over when uncoiling. Existing technologies, such as adding anti-tipping equipment or using smaller coil weights, suffer from high costs and low efficiency.
By positioning and pressing the scrap steel coil at the tail end, and by using the slow descent of the support roller group of the unloading trolley and the reverse rotation of the coiler, the outer ring of the scrap steel coil expands and the tail position is controlled, gradually releasing elastic potential energy and preventing overturning.
It improves unwinding safety and production efficiency, reduces costs, ensures production rhythm and yield, and avoids waste from additional equipment investment and increased weight.
Smart Images
Figure CN122125087A_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the technical field of uncoiling waste coils, and in particular to a method and system for uncoiling hot-rolled finished thin scrap steel coils. Background Technology
[0002] With the increasing market demand for high-strength strip thinning, the manufacturing of high-strength steel often suffers from excessive thickness tolerances at both the beginning and end. A 20-meter-long scrap steel coil is required from each end to ensure the strip's performance meets standards. Furthermore, during hot rolling, quality fluctuations occasionally result in some coils with defects at both the beginning and end. To ensure economic efficiency, these defective coils need to be transported to the finishing unit for rework, thus requiring the collection of scrap steel coils.
[0003] Small coils of scrap steel are prone to tipping over after exiting the coiler drum during unloading. This is mainly because the weight of the small coil itself is insufficient to suppress the elastic potential energy of the tail.
[0004] To address this issue, most companies have adopted the method of adding anti-rollover equipment to ensure normal unloading. However, this has the disadvantages of increasing investment and maintenance costs, and the anti-rollover equipment can also disrupt the original production rhythm and reduce production efficiency.
[0005] Secondly, some companies increase the weight of the small coils to suppress the tail end, but this method has the disadvantages of causing excessive waste in the yield, which is not conducive to the sustainable development of enterprises, resulting in high production costs and low production profits (because the aforementioned small coils of scrap steel affect the gross profit per ton of steel of enterprises, and the greater the weight of the scrap steel coils produced, the greater the loss of gross profit per ton of steel).
[0006] Therefore, based on the above-mentioned technical problems, this application proposes a method and system for uncoiling hot-rolled finished thin scrap steel coils that can control production efficiency and has high safety. Summary of the Invention
[0007] The purpose of this invention is to overcome the shortcomings of the prior art and provide a method and system for uncoiling hot-rolled finished thin scrap steel coils.
[0008] To achieve the above objectives, the present invention provides a method for uncoiling hot-rolled finished thin scrap steel coils, comprising the following steps: Step 1: Position the scrap steel coil with its tail end on the coiler, and after positioning the scrap steel coil with its tail end, press the scrap steel coil with the pressing roller group on the coiler. Step 2: Move the pre-set unloading trolley to a position directly below the scrap steel coil, and raise the support roller group of the unloading trolley to the first pre-set position; Step 3: Move the clamping roller group on the coiler away from the scrap steel coil, so that the outer ring of the scrap steel coil slowly expands, and make the support roller group of the uncoiling trolley descend to the second preset position at a preset speed; Step 4: Rotate the coiler drum in the opposite direction of the scrap steel coil tightening to a preset degree, and after the scrap steel coil is tightened to the preset degree and its tail position is at the third preset position, stop the coiler from rotating. Step 5: Disconnect the coiler from the scrap steel coil and remove the scrap steel coil from the coiler using the unwinding trolley to complete the unwinding process of the scrap steel coil.
[0009] Furthermore, the pressing roller group in step 1 includes an upper pressing roller and a lower pressing roller arranged symmetrically in the upper and lower positions. When the pressing roller group presses the scrap steel coil, the upper pressing roller is located at the ten o'clock position on the outer ring of the scrap steel coil, and the lower pressing roller is located at the seven o'clock position on the outer ring of the scrap steel coil.
[0010] Furthermore, the specific steps of step 1 include: Step 1.1: Clamp the head of the scrap steel strip with the clamping end of the coiler, and rotate the drum of the coiler in the direction of tightening the scrap steel strip until the scrap steel is coiled and bundled. Step 1.2: Position the tail of the scrap steel coil so that the tail of the scrap steel coil rotates to the fourth preset position; Step 1.3: After completing the tail positioning of the scrap steel coil, stop the rotation of the coiler and make the clamping roller group on the coiler clamp the scrap steel coil.
[0011] Furthermore, in step 1.2, the fourth preset position is the eight o'clock position of the scrap steel coil.
[0012] Furthermore, the first preset position in step 2 is the position where the support roller group of the unloading trolley contacts the outer peripheral surface of the scrap steel coil.
[0013] Furthermore, the preset degree in step 4 is that the maximum gap between the layers of scrap steel coils is less than or equal to 0.1 mm.
[0014] Furthermore, in step 4, the third preset position is the seven o'clock position of the scrap steel coil.
[0015] Based on the same inventive concept, this application also provides an uncoiling system for hot-rolled finished thin scrap steel coils, including a primary tail positioning module, an uncoiling trolley drive module, a scrap steel coil outer diameter adjustment module, a secondary tail positioning module, and an uncoiling module. The primary tail positioning module is used to position the scrap steel coil located on the coiler by the tail, and after the tail positioning of the scrap steel coil is completed, the pressing roller group on the coiler is used to press the scrap steel coil. The unloading trolley drive module is used to move the preset unloading trolley to a position directly below the scrap steel coil and raise the support roller group of the unloading trolley to a first preset position. The outer diameter adjustment module of the scrap steel coil is used to move the pressing roller group on the coiler away from the scrap steel coil, so that the outer ring of the scrap steel coil slowly expands and the support roller group of the uncoiling trolley descends to the second preset position at a preset speed. The secondary tail positioning module is used to make the coiler's drum rotate in the opposite direction to the direction of the scrap steel coil tightening, and after the scrap steel coil is tightened to a preset degree and its tail position is at a third preset position, the coiler stops rotating. The unwinding module is used to disconnect the coiler from the scrap steel coil and remove the scrap steel coil from the coiler via the unwinding trolley to complete the unwinding process of the scrap steel coil.
[0016] Based on the same inventive concept, this application also provides a data processing device, including: a memory and a processor, wherein the memory is used to store a computer program; and the processor is used to execute the computer program to implement the uncoiling method for hot-rolled finished thin scrap steel coils as described above.
[0017] Based on the same inventive concept, this application also provides a computer-readable storage medium storing a computer program, which, when executed by a processor, implements the uncoiling method for hot-rolled finished thin scrap steel coils as described above.
[0018] The present invention employs the above-described solution, and its beneficial effects are as follows: By increasing the outer diameter of the scrap steel coil, the maximum static friction between the coil layers when the outer ring of the scrap steel coil is tightly wound relatively offsets part of the elastic potential energy. Combined with its own weight, this can prevent rollover accidents and improve safety. At the same time, by adjusting the tail position of the scrap steel coil, its own weight can suppress the tail when it is unloaded onto the unloading trolley, preventing uncontrollable rotation and rollover. In addition, by having the support rollers of the unloading trolley descend slowly, gradually providing support to the outer ring of the scrap steel coil. The expansion space allows the elastic potential energy of the outer ring to be slowly released as the support rollers descend. The gaps between the layers of the scrap steel coil also loosen from the outside to the inside, preventing violent expansion and rotation of the scrap steel coil that could damage nearby operators or equipment, thus improving unloading safety. Furthermore, it eliminates the need for additional anti-rollover equipment or increased weight of the coil itself (only increasing the outer diameter of the scrap steel coil), ensuring production costs and efficiency, and does not affect the normal production rhythm (without impacting other strip steel production processes), thus guaranteeing production efficiency. Attached Figure Description
[0019] Figure 1This is a flowchart illustrating the uncoiling method for hot-rolled finished thin scrap steel coils in this embodiment.
[0020] Figure 2 This is a schematic diagram of step 1 in this embodiment.
[0021] Figure 3 This is a schematic diagram of step 2 in this embodiment.
[0022] Figure 4 This is a schematic diagram of step 3 in this embodiment.
[0023] Figure 5 This is a schematic diagram of step 3 in this embodiment.
[0024] Figure 6 This is a schematic diagram of step 4 in this embodiment.
[0025] Figure 7 This is a schematic diagram of step 5 in this embodiment.
[0026] Figure 8 This is a schematic diagram of the unloading system for hot-rolled finished thin scrap steel coils in this embodiment. Detailed Implementation
[0027] To facilitate understanding of the present invention, a more complete description is given below with reference to the accompanying drawings. Preferred embodiments of the invention are shown in the drawings. However, the invention can be implemented in many different forms and is not limited to the embodiments described herein. These embodiments are provided to provide a thorough and complete understanding of the disclosure of the invention. Example 1
[0028] See appendix Figure 1 As shown in this embodiment, a method for uncoiling hot-rolled finished thin scrap steel coils includes the following steps: Step 1: See Appendix Figure 2 As shown ( Figure 2 The arrow above indicates the rotation direction of the coiler drum. The scrap steel coil on the coiler is positioned at the tail, and after the tail positioning is completed, the pressing roller group on the coiler is pressed to tighten the scrap steel coil. Furthermore, the specific steps of step 1 include: Step 1.1: Clamp the head of the scrap steel strip with the clamping end of the coiler, and rotate the drum of the coiler in the direction of tightening the scrap steel strip until the scrap steel is coiled and bundled. Step 1.2: Position the tail of the scrap steel coil so that the tail of the scrap steel coil rotates to the fourth preset position, where the fourth preset position is the eight o'clock position of the scrap steel coil. Step 1.3: After completing the tail positioning of the scrap steel coil, stop the rotation of the coiler and allow the clamping roller group on the coiler to clamp the scrap steel coil. The clamping roller group includes an upper clamping roller and a lower clamping roller arranged symmetrically (with a gap between them). When clamping the scrap steel coil, the upper clamping roller is located at the ten o'clock position on the outer ring of the scrap steel coil, and the lower clamping roller is located at the seven o'clock position on the outer ring of the scrap steel coil. Through the above-mentioned position setting of the upper and lower clamping rollers, the scrap steel coil can be effectively, stably, and safely fixed in conjunction with the coiler drum. This avoids unnecessary damage to nearby operators / equipment caused by the tail of the scrap steel coil being unable to suppress the elastic potential energy of its outer ring after winding, thus relatively reducing the cost of unwinding and improving the safety of unwinding.
[0029] Step 2: See Appendix Figure 3 As shown, the pre-set uncoiling trolley is moved to a position directly below the scrap steel coil, and the support roller group of the uncoiling trolley is raised to a first preset position. The first preset position is the position where the support roller group of the uncoiling trolley contacts the outer circumferential surface of the scrap steel coil. The position of the support roller group at this position can further limit the uncontrolled rotation of the scrap steel coil due to elasticity and improve the safety of the uncoiling process. It should be noted that the support roller group of the uncoiling trolley mentioned above includes two spaced support rollers. The center distance between the two support rollers is preferably 360 mm, and the diameter of the scrap steel coil formed in this embodiment is within the range of 770~800 mm. By setting the center distance between the two support rollers and the diameter of the scrap steel coil, it is ensured that the uncoiling trolley can stably and effectively support the scrap steel coil, avoiding the scrap steel coil from rolling off during transportation due to swaying due to too small a center distance, or the scrap steel coil from falling directly through the support roller group due to too large a center distance, thereby ensuring the stable progress of the uncoiling operation.
[0030] Step 3: See Appendix Figure 4-5 As shown ( Figure 4The upper arrow indicates the rotation direction of the scrap steel coil, and the lower hollow arrow indicates the movement direction of the support roller group of the uncoiling trolley. This causes the clamping roller group on the coiler to move away from the scrap steel coil (releasing the fixation of the scrap steel coil), allowing the outer ring of the scrap steel coil to slowly expand. The support roller group of the uncoiling trolley then descends at a preset speed (preferably 5 m / min) to a second preset position (preferably a 100 mm descent, increasing the outer diameter of the scrap steel coil by 200 mm). This converts the vertical displacement of the support roller group of the uncoiling trolley into the expansion of the outer ring of the scrap steel coil. Furthermore, after the uncoiling trolley descends 100 mm, the outer diameter of the scrap steel coil (the diameter of the outer ring) increases by 200 mm. A larger outer diameter results in a smaller curvature and lower elastic potential energy. An increase of 200 mm in the outer diameter reduces the elastic potential energy to 26.5%W (coil weight). For example, when the yield strength of the scrap steel coil is 260 MPa, an increase of 200 mm in its outer diameter... After mm, its elastic potential energy decreased by 0.23 tons of roll weight.
[0031] It should be noted that small coils of scrap steel, such as the aforementioned coils, are prone to tipping over after exiting the coiler drum during unloading. The main reason is that the weight of the small coil itself is insufficient to suppress the elastic potential energy of the tail. To address this issue, most companies add anti-tipping equipment to ensure normal unloading, but this increases investment and maintenance costs. Moreover, the anti-tipping equipment can disrupt the original production rhythm, reducing production efficiency. Secondly, some companies increase the weight of the small coils to suppress the tail, but this method results in excessive waste of yield, hindering sustainable development, and leading to high production costs and low profits (because these small coils of scrap steel affect the company's gross profit per ton of steel; the larger the weight of the scrap steel coil produced, the greater the loss in gross profit per ton of steel).
[0032] In this embodiment, by slowly lowering the support rollers of the uncoiling trolley, space is gradually provided for the outer ring of the scrap steel coil to expand. This allows the elastic potential energy of the outer ring to be released slowly as the support rollers descend, and the gaps between the coil layers loosen from the outside to the inside (and the greater the strength of the steel, the greater the looseness between the coil layers). This avoids violent expansion and rotation of the scrap steel coil, which could cause damage to nearby operators / equipment, thus improving uncoiling safety. Furthermore, it eliminates the need for additional anti-rollover equipment or increases the weight of the coil itself, ensuring production costs / efficiency (without affecting the yield rate) and maintaining the normal production rhythm (without affecting other strip steel production processes), thus ensuring production efficiency.
[0033] Step 4: See Appendix Figure 6As shown, the coiler's drum is rotated in the opposite direction to the direction of the scrap steel coil tightening until a preset degree is reached (the preset degree is when the maximum gap between the scrap steel coil layers is less than or equal to 0.1 mm; at this time, the maximum static friction between the coil layers is the greatest when the coil is tightened, which can relatively offset some of the elastic potential energy, avoid the accident of overturning, and improve safety). This causes the outer ring of the scrap steel coil to gradually tighten and the inner ring of the scrap steel coil to gradually expand. After the scrap steel coil is tightened to the preset degree and its tail position is at the third preset position, the coiler is stopped rotating. The third preset position is the seven o'clock position of the scrap steel coil. Step 5: See Appendix Figure 7 As shown, the clamping end of the coiler (which is generally a clamping clamp, but the specific clamping component can be selected according to the actual situation, and no further restrictions are made here) loosens the lead of the scrap steel / scrap steel coil, and the coiler's drum retracts (to avoid the drum rubbing against the inner wall of the inner coil when the scrap steel coil is removed by the unwinding trolley, or to prevent the scrap steel coil from being in a stable state and thus failing to achieve the purpose of transportation, ensuring the normal progress of the unwinding operation and relative safety of the operator / equipment), so that the coiler disconnects from the scrap steel coil, and the scrap steel coil is removed from the coiler by the unwinding trolley to complete the unwinding process of the scrap steel coil. Example 2
[0034] See appendix Figure 8 As shown, a hot-rolled finishing thin scrap steel coil unloading system includes a primary tail positioning module, an unloading trolley drive module, a scrap steel coil outer diameter adjustment module, a secondary tail positioning module, and an unloading module. The tail positioning module is used to position the scrap steel coil on the coiler by the tail, and after the tail positioning of the scrap steel coil is completed, the pressing roller group on the coiler presses the scrap steel coil. The unloading trolley drive module is used to move the preset unloading trolley to a position directly below the scrap steel coil and raise the unloading trolley's support roller group to a first preset position. The outer diameter adjustment module for scrap steel coils is used to move the clamping roller group on the coiler away from the scrap steel coil, so that the outer ring of the scrap steel coil slowly expands and the support roller group of the uncoiling trolley descends to the second preset position at a preset speed. The secondary tail positioning module is used to make the coiler's drum rotate in the opposite direction of the scrap steel coil tightening, and to make the coiler stop rotating after the scrap steel coil is tightened to a preset degree and its tail position is at a third preset position. The unwinding module is used to disconnect the coiler from the scrap steel coil and remove the scrap steel coil from the coiler via the unwinding trolley to complete the unwinding process. Example 3
[0035] Based on the same inventive concept, this application also provides a data processing device, including: a memory and a processor, wherein the memory is used to store a computer program; and the processor is used to execute the computer program to implement the uncoiling method for hot-rolled finished thin scrap steel coils as described above. Example 4
[0036] Based on the same inventive concept, this application also provides a computer-readable storage medium storing a computer program, which, when executed by a processor, implements the uncoiling method for hot-rolled finished thin scrap steel coils as described above.
[0037] The embodiments described above are merely preferred embodiments of the present invention and are not intended to limit the present invention in any way. Any modifications or variations made by those skilled in the art, without departing from the scope of the present invention, using the disclosed technical content, are equivalent embodiments of the present invention. Therefore, all equivalent changes made based on the concept of the present invention without departing from the scope of the present invention should be covered within the protection scope of the present invention.
Claims
1. A method for uncoiling hot-rolled finished thin scrap steel coils, characterized in that: Includes the following steps: Step 1: Position the scrap steel coil with its tail end on the coiler, and after positioning the scrap steel coil with its tail end, press the scrap steel coil with the pressing roller group on the coiler. Step 2: Move the pre-set unloading trolley to a position directly below the scrap steel coil, and raise the support roller group of the unloading trolley to the first pre-set position; Step 3: Move the clamping roller group on the coiler away from the scrap steel coil, so that the outer ring of the scrap steel coil slowly expands, and make the support roller group of the uncoiling trolley descend to the second preset position at a preset speed; Step 4: Rotate the coiler drum in the opposite direction of the scrap steel coil tightening to a preset degree, and after the scrap steel coil is tightened to the preset degree and its tail position is at the third preset position, stop the coiler from rotating. Step 5: Disconnect the coiler from the scrap steel coil and remove the scrap steel coil from the coiler using the unwinding trolley to complete the unwinding process of the scrap steel coil.
2. The method for uncoiling hot-rolled finished thin scrap steel coils according to claim 1, characterized in that: The pressing roller assembly in step 1 includes an upper pressing roller and a lower pressing roller arranged symmetrically in the upper and lower positions. When the pressing roller assembly presses the scrap steel coil, the upper pressing roller is located at the ten o'clock position on the outer ring of the scrap steel coil, and the lower pressing roller is located at the seven o'clock position on the outer ring of the scrap steel coil.
3. The method for uncoiling hot-rolled finished thin scrap steel coils according to claim 1, characterized in that: The specific steps of step 1 include: Step 1.1: Clamp the head of the scrap steel strip with the clamping end of the coiler, and rotate the drum of the coiler in the direction of tightening the scrap steel strip until the scrap steel is coiled and bundled. Step 1.2: Position the tail of the scrap steel coil so that the tail of the scrap steel coil rotates to the fourth preset position; Step 1.3: After completing the tail positioning of the scrap steel coil, stop the rotation of the coiler and make the clamping roller group on the coiler clamp the scrap steel coil.
4. The method for uncoiling hot-rolled finished thin scrap steel coils according to claim 3, characterized in that: In step 1.2, the fourth preset position is the eight o'clock position of the scrap steel coil.
5. The method for uncoiling hot-rolled finished thin scrap steel coils according to claim 1, characterized in that: The first preset position in step 2 is the position where the support roller group of the unloading trolley contacts the outer peripheral surface of the scrap steel coil.
6. The method for uncoiling hot-rolled finished thin scrap steel coils according to claim 1, characterized in that: The preset degree in step 4 is that the maximum gap between the layers of scrap steel coils is less than or equal to 0.1 mm.
7. The method for uncoiling hot-rolled finished thin scrap steel coils according to claim 1, characterized in that: In step 4, the third preset position is the seven o'clock position of the scrap steel coil.
8. A system for uncoiling hot-rolled finished thin scrap steel coils, characterized in that: It includes a primary tail positioning module, an uncoil trolley drive module, a scrap steel coil outer diameter adjustment module, a secondary tail positioning module, and an uncoil module. The primary tail positioning module is used to position the scrap steel coil located on the coiler by the tail, and after the tail positioning of the scrap steel coil is completed, the pressing roller group on the coiler is used to press the scrap steel coil. The unloading trolley drive module is used to move the preset unloading trolley to a position directly below the scrap steel coil and raise the support roller group of the unloading trolley to a first preset position. The outer diameter adjustment module of the scrap steel coil is used to move the pressing roller group on the coiler away from the scrap steel coil, so that the outer ring of the scrap steel coil slowly expands and the support roller group of the uncoiling trolley descends to the second preset position at a preset speed. The secondary tail positioning module is used to make the coiler's drum rotate in the opposite direction to the direction of the scrap steel coil tightening, and after the scrap steel coil is tightened to a preset degree and its tail position is at a third preset position, the coiler stops rotating. The unwinding module is used to disconnect the coiler from the scrap steel coil and remove the scrap steel coil from the coiler via the unwinding trolley to complete the unwinding process of the scrap steel coil.
9. A computer device, comprising a memory and a processor, wherein the memory stores a computer program executable on the processor, characterized in that, When the processor executes the computer program, it implements the method described in any one of claims 1 to 7.
10. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores machine-executable instructions that, when invoked and executed by a processor, cause the processor to perform the method according to any one of claims 1 to 7.