Anti-collapse steel coil production method

Abstract

The invention relates to an anti-collapse steel coil production method which comprises the following steps: carrying out heat treatment on a steel coil to obtain a heat-treated steel coil; in the heat treatment process, the steel coil is in a hollow state without inner hole support; and in the vertical coil state, inner hole supporting is conducted on the heat treatment steel coil, then the heat treatment steel coil is overturned to be in the horizontal state, and follow-up technological operation is conducted. According to the method, the steel coil is subjected to heat treatment in the hollow state, it can be guaranteed that strip steel around the inner hole of the steel coil is subjected to effective heat treatment, the situation that the heat treatment quality of conventional strip steel with an inner support cannot reach the standard is avoided, the quality of the steel coil is effectively improved, the yield is increased, and a series of production cost caused by adopting a steel sleeve is reduced.

Description

Technical Field

[0001] The invention belongs to the technical field of strip steel production, and in particular relates to a method for producing an anti-collapse steel coil. Background Art

[0002] In the production of cold-rolled products in metallurgical enterprises, according to the heat treatment process requirements, the steel coils need to be heat treated in a vertical state (such as annealing, etc.), and then the vertical coils after heat treatment are flipped into horizontal coils for subsequent production processes.

[0003] After the heat treatment process, the steel coils still maintain their original hollow cylindrical state in the vertical coil state because the interlayer pressure and friction force almost completely disappear; however, after the steel coils are turned over to the horizontal coil state, they will be flattened under the action of their own gravity, and the steel coils and coil cores will be severely deformed, commonly known as collapsed coils. Subsequent production of collapsed coils will be very difficult.

[0004] Thin strip steel coils are generally produced by adding sleeves, that is, before coiling, a steel sleeve is first installed on the coiler mandrel, and then the steel strip is wrapped around the sleeve for coiling to avoid the risk of coil collapse. However, the sleeve-adding method makes the heat treatment quality of the strip close to the sleeve unable to meet the use requirements, reducing the yield rate. At the same time, it brings a series of production equipment and operating procedures such as steel sleeve storage, transportation, installation on the coiler mandrel and subsequent collection, which seriously increases production costs. The loss of steel sleeves will also increase production costs. Summary of the invention

[0005] The invention relates to a method for producing an anti-collapse steel coil, which can at least solve some defects of the prior art.

[0006] The present invention relates to a method for producing an anti-collapse steel coil, comprising:

[0007] Heat treating the steel coil to obtain a heat-treated steel coil; during the heat treatment process, the steel coil is in a hollow state without inner hole support;

[0008] In the vertical coil state, the heat-treated steel coil is supported by the inner hole, and then the heat-treated steel coil is turned over to a horizontal state for subsequent process operations.

[0009] As one of the implementation modes, the inner hole support of the heat-treated steel coil specifically includes:

[0010] lifting the heat-treated steel coil;

[0011] Rolling up the heat-treated steel coil onto a vertically-shrinking reel;

[0012] Make the reel expand in diameter and support the inner hole of the steel coil.

[0013] As one of the implementation modes, rolling up the heat-treated steel coil onto a vertically-shrinking reel specifically includes:

[0014] Hoisting the heat-treated steel coil above the reel;

[0015] Based on image recognition technology and / or mechanical centering method, the axis of the heat-treated steel coil and the reduction drum are aligned;

[0016] After the axis is located, the steel coiling operation is performed.

[0017] As one of the implementation methods, the axis alignment based on image recognition technology specifically includes:

[0018] Capture images from directly above the inner hole of the steel coil;

[0019] Performing recognition processing on the image to determine whether the current image is a valid image, wherein when the reel is in the current image and is located in the inner hole of the steel coil, the current image is determined to be a valid image; otherwise, it is determined to be an invalid image, and the lifting equipment is controlled to move the heat-treated steel coil until the collected image is a valid image;

[0020] Based on the effective image information, the relative position relationship between the center point of the inner hole of the steel coil and the center point of the drum is calculated and analyzed to determine whether the distance between the axis of the inner hole of the steel coil and the axis of the drum is within the set range. If so, the axis alignment operation is completed; if not, the lifting equipment is controlled to move the heat-treated steel coil so that the two center points are close to each other until the axis alignment operation is completed.

[0021] As one of the implementation methods, for the analysis and processing of the effective image, the center O1 of the inner hole of the steel coil and the center O6 of the reduced diameter drum are marked in the effective image respectively, and the distance Lc between O1 and O6 is calculated. At the same time, the diameter Dc of the reduced diameter drum in the effective image is calculated, and then the actual distance Lr=Dr*Lc / Dc between the axis of the inner hole of the steel coil and the axis of the drum is calculated, where Dr is the actual diameter of the reduced diameter drum;

[0022] When controlling the lifting equipment to move the heat-treated steel coil so that the two center points are close to each other, define a fitting vector from O1 to O6, calculate the vector angle a between the fitting vector and the direction of the trolley, and decompose the fitting vector toward the trolley direction and the trolley direction to obtain: L 大车 =Lr*cos(a),L 小车 =Lr*sin(a), and accordingly control the moving vehicle to move L 大车 , the car moves L 小车 .

[0023] As one of the implementation methods, the axis alignment based on the mechanical centering method specifically includes:

[0024] Before the diameter reduction reel penetrates the heat-treated steel coil, or when the diameter reduction reel has penetrated the heat-treated steel coil in a suspended state, a mechanical centering device is used to act on the heat-treated steel coil to center the heat-treated steel coil;

[0025] Wherein, the mechanical centering device includes at least one group of centering modules, and the centering module includes two groups of centering execution units arranged symmetrically relative to the axis of the reel. The actions of the two groups of centering execution units in each group of centering modules approaching or moving away from the reduced diameter reel are synchronized.

[0026] As one of the implementation methods, image recognition technology is used in conjunction with a mechanical alignment method to complete the axis alignment operation.

[0027] As one of the implementation modes, the turning over of the heat-treated steel coil is completed by a turning-over device, and the coil is integrated on the turning-over device.

[0028] As one of the embodiments, the rolling device includes a turning table and a turning drive mechanism, the reel is installed on the turning table, and the axis of the reel is perpendicular to the table surface of the turning table; the turning table is connected to the turning drive mechanism, thereby having a rolling position and a rolling position, in the rolling position, the table surface of the turning table is parallel to the horizontal plane, and in the turning position, the table surface of the turning table is parallel to the vertical plane.

[0029] As one of the implementation modes, the reel is rotatably mounted on the turning table, and a rotation driving mechanism for driving the reel to rotate is provided on the turning table.

[0030] The present invention has at least the following beneficial effects: In the present invention, the steel coil is heat treated in a hollow state, which can ensure that the strip steel around the inner hole of the steel coil is effectively heat treated, avoiding the situation where the heat treatment quality of the conventional strip steel with internal support cannot meet the standards, effectively improving the quality of the steel coil, increasing the yield rate, and reducing the series production costs brought about by the use of steel sleeves. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0032] Figure 1 A schematic diagram of an electromagnetic chuck absorbing a steel coil provided in an embodiment of the present invention;

[0033] Figure 2 A schematic diagram of the assembly of a reel and a reel-turning device provided in an embodiment of the present invention;

[0034] Figure 3 and Figure 4 They are schematic diagrams of the turning table being in the roll receiving position and the roll turning position respectively;

[0035] Figure 5 A schematic diagram of axis alignment (multiple alignments) based on image recognition technology provided by an embodiment of the present invention;

[0036] Figure 6 A schematic diagram of an effective image provided by an embodiment of the present invention;

[0037] Figure 7 A schematic diagram of mechanical alignment provided by an embodiment of the present invention;

[0038] Figure 8 A schematic diagram of the structure of a mechanical centering device provided by an embodiment of the present invention;

[0039] Fig. 9 It is a schematic diagram of connecting each centering execution unit in the same centering layer with the same hydraulic synchronous motor;

[0040] Fig.10 A schematic diagram of the structure of a reel provided in an embodiment of the present invention. DETAILED DESCRIPTION

[0041] The technical solutions in the embodiments of the present invention are described clearly and completely below. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0042] An embodiment of the present invention provides a method for producing an anti-collapse steel coil, comprising:

[0043] The steel coil is heat treated to obtain a heat-treated steel coil 1; during the heat treatment process, the steel coil is in a hollow state without inner hole support;

[0044] In the vertical coil state, the heat-treated steel coil 1 is supported by the inner hole, and then the heat-treated steel coil 1 is turned over to a horizontal state for subsequent process operations.

[0045] During the heat treatment process of the steel coil, the steel coil is in a standing coil state; the heat treatment process includes but is not limited to annealing, such as a bell furnace annealing process.

[0046] The steel coil is in a hollow state without inner hole support, that is, there is no sleeve or the like used for support in the inner hole 101 of the steel coil. During the heat treatment process, there are no other mechanical facilities in the inner hole 101 of the steel coil.

[0047] In this embodiment, the steel coil is heat treated in a hollow state, which can ensure that the strip steel around the inner hole 101 of the steel coil is effectively heat treated, avoiding the situation where the heat treatment quality of the conventional strip steel with internal support fails to meet the standards, effectively improving the quality of the steel coil, increasing the yield rate, and reducing the series production costs brought about by the use of steel sleeves.

[0048] In the coiling state, the heat-treated steel coil 1 maintains a hollow cylindrical state, and after the inner hole support is performed, the steel coil can be prevented from collapsing, which is convenient for subsequent process processing. Among them, the subsequent process operations may be removing the strapping band, uncoiling, etc.

[0049] Preferably, the inner hole support of the heat-treated steel coil 1 specifically includes:

[0050] Lifting the heat-treated steel coil 1;

[0051] Rolling up the heat-treated steel coil 1 onto a vertically-mounted reducing reel 6;

[0052] The reel 6 is expanded in diameter to support the inner hole 101 of the steel coil.

[0053] The heat-treated steel coil 1 can be lifted by a crane mounted electromagnetic chuck 2, and the heat-treated steel coil 1 can be lifted and released conveniently by the electromagnetic chuck 2 gaining and losing power. Figure 1 and Figure 5 A plurality of lifting ears 202 (usually three, but other numbers are also possible) are provided on the electromagnetic chuck 2, and the electromagnetic chuck 2 is mounted on a crane using a chain 203 or the like. The crane may be a manned crane or an unmanned automatic crane.

[0054] Preferably, rolling up the heat-treated steel coil 1 onto the vertically-mounted shrinking reel 6 specifically comprises:

[0055] The heat-treated steel coil 1 is hoisted above the reel 6;

[0056] Based on image recognition technology and / or mechanical centering method, the axis of the heat-treated steel coil 1 and the diameter reduction reel 6 are aligned;

[0057] After the axis is located, the steel coiling operation is performed.

[0058] Among them, the axis alignment of the heat-treated steel coil 1 and the reduction reel 6 is preferably that the axes of the two coincide. Taking into account factors such as actual production conditions, the spacing between the axes of the two is within a set range, which can be regarded as completing the axis alignment. The set range can be <10mm.

[0059] The coiling operation specifically includes lowering the heat-treated coil 1 to a low point, at which time the shrinking drum 6 passes through the inner drum of the coil. Lowering the heat-treated coil 1 to a low point may include placing the heat-treated coil 1 on a coil platform of the coiling device 5 .

[0060] In one embodiment, if Figure 5 , the axis alignment based on image recognition technology specifically includes:

[0061] The image is collected from directly above the inner hole 101 of the steel coil;

[0062] The image is recognized and processed to determine whether the current image is a valid image, wherein when the reel 6 is in the current image and is located in the inner hole 101 of the steel coil, the current image is determined to be a valid image; otherwise, it is determined to be an invalid image, and the lifting equipment is controlled to move the heat-treated steel coil 1 until the collected image is a valid image;

[0063] Based on the effective image information, the relative position relationship between the center point of the inner hole 101 of the steel coil and the center point of the drum is calculated and analyzed to determine whether the distance between the axis of the inner hole 101 of the steel coil and the axis of the drum is within the set range. If so, the axis alignment operation is completed; if not, the lifting equipment is controlled to move the heat-treated steel coil 1 so that the two center points are close to each other until the axis alignment operation is completed.

[0064] Since the image is collected from directly above the inner hole 101 of the steel coil, the field of view is limited by the inner hole 101 of the steel coil and the reduced diameter reel 6 is searched, the axis alignment accuracy and efficiency can be correspondingly improved.

[0065] Preferably, if Figure 1 and Figure 5 The image acquisition unit 204 is installed on the electromagnetic chuck 2, wherein an image acquisition hole 201 is opened on the electromagnetic chuck 2, and the image acquisition unit 204 can be installed on the electromagnetic chuck 2 through a mounting bracket 206 and is located in the image acquisition hole 201 or directly above the image acquisition hole 201. The image acquisition hole 201 is preferably located at the center of the electromagnetic chuck 2, so as to be directly connected with the inner hole 101 of the steel coil, so as to ensure that the image acquisition unit 204 can acquire images directly above the inner hole 101 of the steel coil. The image acquisition unit 204 uses a visual sensor, which can be a camera or other device. A protective cover 205 can be provided to protect the image acquisition unit 204.

[0066] In the above structure, based on the image acquisition unit 204, it is also possible to determine whether the position of the electromagnetic suction cup 2 to absorb the steel coil is appropriate, thereby improving the stability of the steel coil during lifting and reducing unnecessary shaking, etc., which can also improve the accuracy of axis positioning.

[0067] Among them, the position of the lifting equipment can be located in real time, and the moving direction of the heat-treated steel coil 1 can be controlled according to the real-time position of the lifting equipment and the position of the reel 6. In particular, in the case where the crane includes a crane trolley and a trolley (the trolley moves on the crane trolley), the crane trolley and the trolley are respectively equipped with position detection units, so as to accurately control the moving direction and moving distance of the crane trolley and the trolley.

[0068] Preferably, in the present application, an image recognition method based on a convolutional neural network is adopted, and the convolutional neural network CNN model can be constructed based on the PaddlePaddle deep learning framework.

[0069] like Figure 6 For the effective image, the inner hole 101 of the steel coil, the reduced diameter reel 6 and the direction features of the trolley are identified in the image, and the center O1 of the inner hole 101 of the steel coil and the center O6 of the reduced diameter reel 6 are marked in the effective image respectively, and the distance Lc between O1 and O6 is calculated, and the diameter Dc of the reduced diameter reel 6 in the effective image is calculated at the same time. The actual diameter Dr of the reduced diameter reel 6 is known, and the actual distance Lr=Dr*Lc / Dc between the axis of the inner hole 101 of the steel coil and the axis of the reel is calculated by the similarity principle; therefore, by judging whether Lr is within the set range, the purpose of judging whether the axis is accurately found is achieved.

[0070] Define a fitting vector from O1 to O6, calculate the vector angle a between the fitting vector and the direction of the vehicle, and decompose the fitting vector into the direction of the vehicle and the direction of the car, and get: L 大车 =Lr*cos(a),L 小车 =Lr*sin(a). Control the moving vehicle L 大车 , the car moves L 小车 , O1 and O6 can be made to coincide, thus realizing accurate axis positioning.

[0071] In one of the embodiments, during the coiling process of the heat-treated steel coil 1 , the above-mentioned axis alignment operations are performed several times in sequence from top to bottom, which can effectively improve the accuracy of the heat-treated steel coil 1 being coiled onto the diameter reduction reel 6 .

[0072] In one embodiment, if Figure 7 and Figure 8 , the axis alignment based on mechanical alignment method specifically includes:

[0073] Before the diameter reduction reel 6 penetrates the heat-treated steel coil 1, or when the diameter reduction reel 6 has penetrated the heat-treated steel coil 1 in a suspended state, a mechanical centering device is used to act on the heat-treated steel coil 1 to center the heat-treated steel coil 1;

[0074] Among them, the mechanical centering device includes at least one group of centering modules, and the centering module includes two groups of centering execution units 4 arranged symmetrically relative to the center axis of the reel. The actions of the two groups of centering execution units 4 in each group of centering modules approaching or moving away from the reduced diameter reel 6 are synchronized.

[0075] Preferably, the mechanical centering device includes multiple sets of centering modules, which can improve the axis alignment accuracy.

[0076] Preferably, the mechanical centering device includes a plurality of centering layers arranged sequentially from top to bottom, each centering layer includes at least one group of centering modules, and when the centering layer has multiple groups of centering modules, each centering execution unit 4 of the centering layer is distributed around the axis of the reel. By using multiple centering layers, the heat-treated steel coil 1 can be centered sequentially from top to bottom, and / or the centering operation can be performed simultaneously by multiple centering layers, which can effectively improve the accuracy of axis alignment.

[0077] It can be understood that in each group of centering modules, the centering execution parts of the two groups of centering execution units 4 for contacting the heat-treated steel coil 1 are distributed in a common circle (the center of the circle is located on the axis of the coil).

[0078] In one embodiment, a centering roller 401 is used as a centering actuator. The axis of the centering roller 401 is parallel to the horizontal plane, so that the centering roller 401 is suitable for rolling contact with the heat-treated steel coil 1 to reduce the friction between the two and avoid surface defects on the strip. The centering roller 401 is rotatably mounted on a centering roller frame 402, and the centering roller frame 402 is driven by a centering drive unit 404 so that it can approach or move away from the axis of the reel. The centering drive unit 404 can use a hydraulic cylinder, a pneumatic cylinder or other linear drive device. Among them, the synchronous action between the centering actuators 4 can be achieved by a hydraulic synchronous motor; further preferably, as Fig. 9 Each centering execution unit 4 in the same centering layer is connected to the same hydraulic synchronous motor to achieve synchronous action of each centering execution unit 4 in the same centering layer.

[0079] Furthermore, a guide mechanism 403 may be provided to guide the translational movement of the centering roller frame 402 to improve the centering accuracy and operation reliability. The guide mechanism 403 may be a slide block-slide rail matching guide method, a sleeve-guide rod matching guide method, etc.

[0080] A centering device frame 3 may be provided near the reel 6 , and the centering drive unit 404 , the guide mechanism, etc. may be mounted on the centering device frame 3 via a fixing block 405 .

[0081] When image recognition technology and mechanical centering are used simultaneously, the two methods cooperate with each other to significantly improve the accuracy of axis alignment between the heat-treated steel coil 1 and the diameter reduction reel 6. Among them, when the heat-treated steel coil 1 is located above the diameter reduction reel 6, preliminary axis alignment is performed through image recognition technology or through the cooperation of image recognition technology and the upper centering layer, which can not only improve the accuracy and efficiency of axis alignment, but also prevent abnormal contact / collision between the diameter reduction reel 6 and the heat-treated steel coil 1 caused by poor positioning; after the diameter reduction reel 6 penetrates into the inner hole 101 of the steel coil (at this time, the heat-treated steel coil 1 is still in a suspended state), the centering operation is performed through the lower centering layer or the centering operation is performed simultaneously by each centering layer, which can ensure the accuracy of axis alignment. At the same time, the two methods can be calibrated with each other. For example, after the preliminary axis alignment is performed through image recognition technology, when further mechanical alignment is performed, the accuracy of the preliminary axis alignment can be judged by detecting the steel coil pressure exerted on the two alignment actuators in the same group, and / or detecting whether the two alignment actuators in the same group are in contact with the heat-treated steel coil 1 at the same time, thereby calibrating the image recognition technology, which is beneficial to the deep learning and model optimization of the convolutional neural network CNN model.

[0082] As described above, the inner hole of the heat-treated steel coil 1 is supported by the reel 6; and the turning over of the heat-treated steel coil 1 is completed by the turning device 5, wherein during the turning over of the heat-treated steel coil 1, the reel 6 maintains support for the inner hole 101 of the steel coil, and therefore, the reel 6 is preferably integrated on the turning device 5.

[0083] In one embodiment, if Figure 2-Figure 4 The above-mentioned rolling device 5 includes a turning table 501 and a turning drive mechanism 509. The reel 6 is installed on the turning table 501, and the axis of the reel 6 is perpendicular to the table surface of the turning table 501; the turning table 501 is connected to the turning drive mechanism 509, so as to have a rolling position and a rolling position. In the rolling position, the table surface of the turning table 501 is parallel to the horizontal plane, and in the rolling position, the table surface of the turning table 501 is parallel to the vertical plane.

[0084] Among them, the above-mentioned rolling device 5 can further include a fixed base 502, which is used to be installed on the workshop foundation. The above-mentioned flipping table 501 is rotatably installed on the fixed base 502. Through the drive of the flipping drive mechanism 509, the flipping table 501 rotates relative to the fixed base 502, so that switching between the rolling position and the rolling position can be realized.

[0085] Preferably, the turning table 501 is provided with supporting feet. When the turning table 501 is in the turning position, the supporting feet are just supported on the workshop foundation, which can improve the structural stability and working reliability of the turning device 5.

[0086] The flip driving mechanism 509 includes but is not limited to a flip hydraulic cylinder. Taking the flip hydraulic cylinder as an example, the cylinder body is hingedly installed on the workshop foundation, and the output end is hingedly connected to the flip platform 501.

[0087] Preferably, the bearing point 504 of the turning platform 501 and the rotation point 503 of the turning platform 501 are arranged on both sides of the axis of the winding drum 6, wherein the bearing point 504 is the connection point between the turning drive mechanism 509 and the turning platform 501, and the rotation point 503 is the hinge point between the turning platform 501 and the fixed base 502. In this way, the stability and safety of the turning of the turning platform 501 and the steel coil 1 can be improved.

[0088] In one embodiment, the reel 6 is rotatably mounted on the turning table 501, and a rotation driving mechanism for driving the reel 6 to rotate is correspondingly provided on the turning table 501. By driving the reel 6 to rotate, the reel 6 can drive the steel coil to rotate, which is convenient for subsequent process operations, such as facilitating the robot to remove the strap or unwind the coil.

[0089] Optionally, the rotation drive mechanism includes a drive motor 506, a drive gear 507 and a transmission gear 508, wherein the drive motor 506 is mounted on the turning table 501, the drive gear 507 is mounted on the output shaft of the drive motor 506, the transmission gear 508 is mounted on the reel 6, and the transmission gear 508 is meshed with the drive gear 507; wherein the axis of the transmission gear 508 is parallel to the axis of the reel, and is further preferably coaxially arranged. The drive motor 506, the drive gear 507 and the transmission gear 508 are preferably arranged inside the turning table 501 (taking the coil receiving position as an example, the drive motor 506, the drive gear 507 and the transmission gear 508 are all located below the table of the turning table 501) to avoid interference with the steel coil placed on the table; in addition, a support bearing 505 can be arranged on the turning table 501 to ensure the installation stability and application reliability of the reel 6.

[0090] All existing expansion and contraction reels 6 are suitable for the present embodiment, wherein the reel 6 comprises a plurality of sector plates 601 and an expansion and contraction drive mechanism for driving the sector plates 601 to move synchronously in the radial direction to achieve expansion and contraction. In the reduced diameter state, the sector plates 601 are distributed in a small circle (the diameter of the small circle is R1), and in the expanded diameter state, the sector plates 601 are distributed in a large circle (the diameter of the large circle is R2).

[0091] In one embodiment, if Fig.10The expansion and contraction drive mechanism includes a pyramid sleeve 602 and an expansion and contraction drive structure for driving the pyramid sleeve 602 to move along its own axial direction. The pyramid sleeve 602 has a plurality of drive bevel groups, and the number of the drive bevel groups is the same as that of the sector plates 601 and they are matched one by one. Each drive bevel group includes a plurality of drive bevels 607 distributed in sequence along the axial direction of the pyramid sleeve, and the sector plates 601 are provided with a plurality of bearing drive bevels matched with the wedge surfaces of the drive bevels 607. When the pyramid sleeve 602 moves along its own axial direction, based on the wedge surface matching relationship between the drive bevels 607 and the bearing drive bevels, the sector plates 601 can be made to move synchronously in the radial direction, so as to achieve the purpose of expansion and contraction of the reel 6.

[0092] Optionally, the number of sector plates 601 is four, and the pyramid sleeve 602 has four driving inclined surface groups accordingly.

[0093] As a preferred solution, Fig.10 The expansion and contraction driving structure includes a hollow main shaft 603, a pull rod 604 and an expansion and contraction power unit 605. The pyramid sleeve 602 is mounted on the hollow main shaft 603 and can move along the axial direction of the hollow main shaft 603. The pull rod 604 is movably arranged in the axial cavity of the hollow main shaft 603. One end of the pull rod 604 extends out of the hollow main shaft 603 and is connected to the expansion and contraction power unit 605, so that it can move axially in the hollow main shaft 603. The pyramid sleeve 602 is fixedly connected to the pull rod 604, so that the pull rod 604 can drive the pyramid sleeve 602 to move axially.

[0094] The hollow main shaft 603 is the main bearing member of the reel 6. Figure 3 , which can cooperate with the support bearing 505 on the turning table 501.

[0095] Preferably, a limiting structure is provided on the hollow main shaft 603 to limit the relative rotation between the pyramid sleeve 602 and the hollow main shaft 603 , including but not limited to the following structure: at least one sliding key is provided between the pyramid sleeve 602 and the hollow main shaft 603 .

[0096] Optionally, the pyramid sleeve 602 is connected to the pull rod 604 via a flat pin 606. A movable window may be provided on the hollow main shaft 603 accordingly, and the flat pin 606 passes through the movable window and is respectively connected to the pyramid sleeve 602 and the pull rod 604, wherein the length of the movable window in the axial direction of the hollow main shaft should not be less than the movable stroke of the pull rod 604.

[0097] The expansion and contraction power unit 605 may be a linear drive device such as a hydraulic cylinder or a pneumatic cylinder. Fig.10 The hollow main shaft 603 and the expansion and contraction power unit 605 may be connected in a detachable manner by means of a flange connection structure 610 or the like; the output shaft of the expansion and contraction power unit 605 may be connected to the pull rod 604 via a coupling 611 .

[0098] In the structure in which the reel 6 is rotatably mounted on the turning table 501 , the rotation driving mechanism may be connected to the hollow main shaft 603 , for example, the transmission gear 508 is mounted on the hollow main shaft 603 .

[0099] A corresponding avoidance hole is provided on the turning table 501 for the fan-shaped plate 601 to pass through and extend. In one embodiment, the two ends of the fan-shaped plate 601 are respectively located on both sides of the table surface of the turning table 501, that is, the fan-shaped plate 601 partially extends out of the table surface of the turning table 501, and partially is located inside the turning table 501; the diameter of the avoidance hole is preferably the same as the diameter R2 of the large circle, so that when the winding drum 6 is in an expanded state, the fan-shaped plate 601 contacts the turning table 501, and the force applied to the fan-shaped plate 601 can be more reliably transmitted to the turning table 501, thereby ensuring the application reliability of the above-mentioned rolling device 5.

[0100] In one embodiment, if Fig.10 A positioning plate 608 is provided at the cantilever end of the hollow main shaft 603. The plate surface of the positioning plate 608 is perpendicular to the axis of the hollow main shaft 603. A plurality of positioning blocks are convexly provided on the periphery of the positioning plate 608. Positioning holes are provided on the fan-shaped plate 601 for matching. The number of positioning blocks is the same as that of the fan-shaped plate 601 and they are configured one-to-one. Each positioning block is inserted into the corresponding positioning hole and the two are guided to cooperate (the guiding direction is obviously parallel to the radial movement direction of the fan-shaped plate 601). The protruding length of the positioning block ensures that the reel 6 is still guided to cooperate with the positioning hole when the reel 6 is in the state of expansion. Based on the above design, the fan-shaped plate 601 can be limited to move only in the radial direction to ensure the reliability of the expansion and contraction of the reel 6. In particular, the positioning plate 608 is detachably fixed on the hollow main shaft 603. When the connection between the positioning plate 608 and the hollow main shaft 603 is released, the positioning plate 608 and each sector plate 601 can be removed from the hollow main shaft 603, thereby facilitating the disassembly and maintenance of the sector plate 601 and the reel 6. The positioning plate 608 is preferably mounted on the hollow main shaft 603 by means of a fastening screw 609 or the like; since the positioning plate 608 is fixed on the hollow main shaft 603, when the reel 6 expands or contracts, the fastening screw 609 will not bear axial tension, thereby obtaining reliable structural stability of the positioning plate 608 and a guiding effect on the sector plate 601.

[0101] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A method for producing an anti-collapse steel coil, characterized in that: include: heat treating the steel coil to obtain a heat-treated steel coil; During the heat treatment process, the steel coil is in a hollow state without inner hole support; In the vertical coil state, the heat-treated steel coil is supported by the inner hole, and then the heat-treated steel coil is turned over to a horizontal state for subsequent process operations.

2. The method for producing an anti-collapse steel coil according to claim 1, characterized in that: The inner hole support of the heat-treated steel coil specifically includes: lifting the heat-treated steel coil; Rolling up the heat-treated steel coil onto a vertically-shrinking reel; Make the reel expand in diameter and support the inner hole of the steel coil.

3. The method for producing an anti-collapse steel coil according to claim 2, characterized in that: The step of rolling the heat-treated steel coil onto a vertically-shrinking reel specifically includes: Lifting the heat-treated steel coil to above the reel; Based on image recognition technology and / or mechanical centering method, the axis of the heat-treated steel coil and the reduction drum are aligned; After the axis is located, the steel coiling operation is performed.

4. The method for producing an anti-collapse steel coil according to claim 3, characterized in that: Axis alignment based on image recognition technology specifically includes: Capture images from directly above the inner hole of the steel coil; Performing recognition processing on the image to determine whether the current image is a valid image, wherein when the reel is in the current image and is located in the inner hole of the steel coil, the current image is determined to be a valid image; otherwise, it is determined to be an invalid image, and the lifting equipment is controlled to move the heat-treated steel coil until the collected image is a valid image; Based on the effective image information, the relative position relationship between the center point of the inner hole of the steel coil and the center point of the drum is calculated and analyzed to determine whether the distance between the axis of the inner hole of the steel coil and the axis of the drum is within the set range. If so, the axis alignment operation is completed; if not, the lifting equipment is controlled to move the heat-treated steel coil so that the two center points are close to each other until the axis alignment operation is completed.

5. The method for producing an anti-collapse steel coil according to claim 4, characterized in that: For the analysis and processing of the effective image, the center O1 of the inner hole of the steel coil and the center O6 of the reduced diameter drum are marked in the effective image respectively, and the distance Lc between O1 and O6 is calculated. At the same time, the diameter Dc of the reduced diameter drum in the effective image is calculated, and then the actual distance Lr=Dr*Lc / Dc between the axis of the inner hole of the steel coil and the axis of the drum is calculated, where Dr is the actual diameter of the reduced diameter drum; When controlling the lifting equipment to move the heat-treated steel coil so that the two center points are close to each other, define a fitting vector from O1 to O6, calculate the vector angle a between the fitting vector and the direction of the trolley, and decompose the fitting vector toward the trolley direction and the trolley direction to obtain: L 大车 =Lr*cos(a),L 小车 =Lr*sin(a), and accordingly control the moving vehicle to move L 大车 , the car moves L 小车 .

6. The method for producing an anti-collapse steel coil according to claim 3, characterized in that: The axis alignment based on mechanical alignment includes: Before the diameter reduction reel penetrates the heat-treated steel coil, or when the diameter reduction reel has penetrated the heat-treated steel coil in a suspended state, a mechanical centering device is used to act on the heat-treated steel coil to center the heat-treated steel coil; Wherein, the mechanical centering device includes at least one group of centering modules, and the centering module includes two groups of centering execution units arranged symmetrically relative to the axis of the reel. The actions of the two groups of centering execution units in each group of centering modules approaching or moving away from the reduced diameter reel are synchronized.

7. The method for producing an anti-collapse steel coil according to any one of claims 3 to 6, characterized in that: Image recognition technology is used in conjunction with mechanical alignment to complete the axis alignment operation.

8. The method for producing an anti-collapse steel coil according to claim 2, characterized in that: The turning over of the heat-treated steel coil is accomplished by a turning-over device, on which the coil drum is integrated.

9. The method for producing an anti-collapse steel coil according to claim 8, characterized in that: The rolling device includes a turning table and a turning drive mechanism. The reel is installed on the turning table, and the axis of the reel is perpendicular to the table surface of the turning table. The turning table is connected to the turning drive mechanism, so as to have a rolling position and a rolling position. In the rolling position, the table surface of the turning table is parallel to the horizontal plane, and in the turning position, the table surface of the turning table is parallel to the vertical plane.

10. The method for producing an anti-collapse steel coil according to claim 9, characterized in that: The reel is rotatably mounted on the turning platform, and a rotation driving mechanism for driving the reel to rotate is provided on the turning platform.

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