High-strength steel winding stress testing method based on optical fiber
By arranging optical fiber units on high-strength steel coils, stress changes during winding, annealing and transportation are monitored in real time, solving the problem of difficult stress distribution monitoring during cold-rolled strip coiling, improving product quality and reducing production costs.
Patent Information
- Application Number
- CN202510998972.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-07-21
- Publication Date
- 2025-10-17
AI Technical Summary
During the coiling process of cold-rolled strip, it is difficult to monitor and measure the stress distribution between layers inside the coil in real time, which leads to defects such as slippage, loose coiling and rib formation during the coiling process.
Using the optical fiber winding arrangement method, the optical fiber units are arranged in specific positions and directions on the high-strength steel coil to form circumferential and axial optical fiber layers. The stress changes are monitored in real time by the demodulator and the host computer, including the winding, annealing and transportation processes.
It realizes real-time stress detection of high-strength steel coils in each production process, improves product qualification rate, reduces defective product generation and production costs.
Smart Images
Figure CN120800622A_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The present application relates to the field of steel winding technology, in particular to a high-strength steel winding stress test method based on optical fibers. BACKGROUND
[0002] In the process of cold-rolled strip winding, the interlayer internal stress distribution of the steel coil plays a guiding role in the quality of the steel coil winding, and is an important basis for judging whether the layers in the coil will slip and cause defects such as loose coil and ribbing.
[0003] Unlike hot-rolled strip winding, the thickness of single-layer strip steel in cold-rolled strip winding is much thinner than that of hot-rolled strip steel, and the thickness range is mostly 0.2-5mm (while the thickness of hot-rolled strip steel can reach 30mm), and the thickness of the strip steel is one of the most important input parameters for calculating the interlayer stress of the winding, and for the winding of strip steel with different thicknesses, it directly affects the setting of parameters such as radius, winding tightness coefficient and tension in the winding process, and when the thickness is large, the non-circular characteristic in the winding process is large.
[0004] Cold-rolled thin-gauge strip steel is prone to steel coil tower shape and ribbing phenomenon during winding, and the essential reason is that the interlayer stress distribution in the steel coil during winding is uneven, so the distribution and monitoring of interlayer stress can detect the stress state of the steel coil in the production process in real time. SUMMARY
[0005] The technical problem to be solved by the present application is to provide a high-strength steel winding stress test method based on optical fibers, which can solve the problem of difficult and timely measurement of the steel strip winding stress of general steel coils.
[0006] To solve the above technical problems, the technical scheme of the present application is as follows: a high-strength steel winding stress test method based on optical fibers, the innovation point of which is as follows: S1: Optical fiber winding arrangement: divide the length of the high-strength steel strip to be wound into three separation lines, and ensure that the positions of the separation lines of the wound steel coil are located at 1 / 4, 1 / 2 and 3 / 4 positions of the radius length of the steel coil cross section from inside to outside; first, second and third ring-shaped optical fiber layers are arranged from inside to outside at the positions of the three separation lines; and two ring-shaped optical fiber units are arranged in each ring-shaped optical fiber layer; an axial optical fiber layer is arranged along the axis direction of the high-strength steel coil, and the axial optical fiber layers are arranged in the order of first, second and third axial optical fiber layers from the inside to the outside of the high-strength steel; and each axial optical fiber layer is uniformly distributed with four axial optical fiber units along the circumference of the high-strength steel coil; thereby realizing the arrangement of 2x3 ring-shaped optical fiber units and 4x3 axial optical fiber units on each high-strength steel coil; S2: Connection of optical fibers: S2.1: One of the fiber units of the first ring-shaped fiber layer is connected to the first fiber unit of the first axial fiber layer by fusion splicing; another fiber unit of the first ring-shaped fiber layer is connected to the second fiber unit of the first axial fiber layer by fusion splicing; the third and fourth fiber units of the first axial fiber layer are connected by fusion splicing; S2.2: The fusion splicing mode of the second ring-shaped fiber layer and the second axial fiber layer is the same as that of S2.1; S2.3: One of the fiber units of the third ring-shaped fiber layer is connected to the first and second fiber units of the third axial fiber layer by fusion splicing; another fiber unit of the third ring-shaped fiber layer is connected to the third and fourth fiber units of the third axial fiber layer by fusion splicing; S3: Fiber unit extraction: the fiber units are extracted from the high-strength steel coil in three layers, and the end of each fiber unit is provided with a rotary connection terminal for connection to a demodulator; S4: High-strength steel coil stress detection: high-strength steel coil stress detection includes winding stress detection, annealing stress detection, and transportation stress detection; S4.1: Winding stress detection: the fiber units are installed according to the steps of S1 to S3, and are detected by a red light pen device. If no fiber breakage or signal abnormality is found, the fiber unit installation is considered qualified. Then, the rotary connection terminal at the end of the fiber unit is connected to a demodulator, and the demodulator is connected to a host computer. The signal of the fiber unit during the winding process of the high-strength steel coil is continuously monitored by the host computer, and the stress change during the winding process of the high-strength steel coil is recorded. S4.2: Annealing stress detection: the fiber units are installed according to the steps of S1 to S3, and the fiber units are high-temperature-resistant sapphire fiber units. The fiber units are detected by a red light pen device. If no fiber breakage or signal abnormality is found, the fiber unit installation is considered qualified. Moreover, no fiber breakage occurs during the winding process. The end of the fiber unit is drawn out of the annealing furnace, and then the rotary connection terminal at the end of the fiber unit is connected to a demodulator. The demodulator is connected to a host computer. The signal of the fiber unit during the annealing process of the high-strength steel coil is continuously monitored by the host computer, and the stress change during the annealing process of the high-strength steel coil is recorded. S4.3: Transportation stress detection: the fiber units are installed according to the steps of S1 to S3, and are detected by a red light pen device. If no fiber breakage or signal abnormality is found, the fiber unit installation is considered qualified. The demodulator and the host computer are installed on the transportation equipment, the rotary connection terminal at the end of the fiber unit is connected to the demodulator, the demodulator is connected to the host computer, and the signal of the fiber unit during the transportation process of the high-strength steel coil is continuously monitored by the host computer. The stress change during the transportation process of the high-strength steel coil is recorded.
[0007] Further, in the S1: fiber winding arrangement, the bending radius of the fiber unit needs to be increased in design at the vertical corner of the fiber unit; the bending radius position of the fiber unit is fixed by using paper tape, which can avoid displacement and protect the fiber unit; only the start and end of each circle are fixed, and the two positions are ensured to be on the same axis, which is used to reduce the number of fixed points, and the fiber unit can be adjusted more smoothly during the laying process.
[0008] Further, in the S1: fiber winding arrangement, the degree of adhesion of the fiber unit to the high-strength steel coil is maintained; during the laying process of the fiber unit, it is avoided that the strong tensile strength of the thick fiber unit is mistaken for a thick fiber unit, which causes excessive tension, especially shear force, during the laying process, thereby causing invisible damage or even breakage to the inside of the fiber unit.
[0009] The advantages of the present application are: 1) In the present application, the fiber unit is wound in the high-strength steel coil, and the optical fiber layer structure is wound, annealed and transported together with the entire high-strength steel coil; in this way, the high-strength steel coil can be detected at any time during each process, and unqualified high-strength steel coils can be prevented from flowing in the production process; this method can not only pick out defective products at any time, reduce the generation of defective products and improve the product qualification rate, but also can quickly find defective products in the production process and reduce production costs. BRIEF DESCRIPTION OF DRAWINGS
[0010] The present application will be further described in detail below with reference to the accompanying drawings and specific embodiments.
[0011] Figure 1 A fiber unit layout diagram in a high-strength steel coil winding stress test method based on optical fiber according to the present application.
[0012] Figure 2 A fiber unit axial layout diagram in a high-strength steel coil winding stress test method based on optical fiber according to the present application. DETAILED DESCRIPTION
[0013] In order to make the purpose, technical scheme and advantages of the embodiments of the present application clearer, the technical scheme in the embodiments of the present application will be described clearly and completely below with reference to the accompanying drawings of the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all the embodiments. The components of the embodiments of the present application described and shown in the accompanying drawings herein can be arranged and designed in various different configurations.
[0014] Therefore, the following detailed description of the embodiments of the application provided in the drawings is not intended to limit the scope of the claimed application, but merely represents selected embodiments thereof. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts are within the scope of the present application.
[0015] As Figure 1 Figure 2 A high-strength steel winding stress test method based on optical fiber is shown in the following specific test method: S1: Optical fiber winding arrangement: three separation lines are drawn on the length of the high-strength steel strip to be wound, and the positions of the separation lines on the wound steel coil are located at 1 / 4, 1 / 2 and 3 / 4 of the radius length of the steel coil cross section from inside to outside; The first, second and third annular fiber layers are arranged from inside to outside at the three separation line positions; Each annular fiber layer is arranged with two annular fiber units; Each annular fiber layer is arranged with an axial fiber layer along the axis direction of the high-strength steel coil, which is spaced one layer outwardly of the high-strength steel strip, and is sequentially arranged from the inside to the outside as the first, second and third axial fiber layers; Each axial fiber layer is uniformly distributed with four axial fiber units along the circumference of the high-strength steel coil; Each high-strength steel coil is arranged with 2x3 annular fiber units and 4x3 axial fiber units; S2: Connection of optical fibers: S2.1: One of the fiber units in the first annular fiber layer is connected to the first fiber unit in the first axial fiber layer by fusion splicing; the other fiber unit in the first annular fiber layer is connected to the second fiber unit in the first axial fiber layer by fusion splicing; the remaining third and fourth fiber units in the first axial fiber layer are connected by fusion splicing; S2.2: The fusion splicing method of the second annular fiber layer and the second axial fiber layer is the same as S2.1; S2.3: One of the fiber units in the third annular fiber layer is connected to the first and second fiber units in the third axial fiber layer by fusion splicing; the other fiber unit in the third annular fiber layer is connected to the third and fourth fiber units in the third axial fiber layer by fusion splicing; S3: Lead-out of fiber units: The fiber units are led out from the high-strength steel coil in three layers, and the end of each fiber unit is provided with a rotary connection terminal for connection to a demodulator; S4: Stress detection of high-strength steel coil: The stress detection of high-strength steel coil includes winding stress detection, annealing stress detection and transportation stress detection; S4.1: Winding stress detection: install the optical fiber unit according to the steps of S1 to S3, and detect it by the red light pen device. If no optical fiber breakage or signal abnormality is found, the optical fiber unit is considered to be installed qualified. Then connect the rotating connection terminal at the end of the optical fiber unit to the demodulator, and connect the demodulator to the upper computer. Monitor the signal of the optical fiber unit during the high-strength steel winding process through the upper computer, and record the stress change during the high-strength steel winding process. S4.2: Annealing stress detection: install the optical fiber unit according to the steps of S1 to S3, and use the high-temperature-resistant sapphire optical fiber unit. Detect it by the red light pen device. If no optical fiber breakage or signal abnormality is found, the optical fiber unit is considered to be installed qualified. And no optical fiber breakage occurs during the winding process. Lead the end of the optical fiber unit out of the annealing furnace, and then connect the rotating connection terminal at the end of the optical fiber unit to the demodulator. Connect the demodulator to the upper computer. Monitor the signal of the optical fiber unit during the high-strength steel annealing process through the upper computer, and record the stress change during the high-strength steel annealing process. S4.3: Transportation stress detection: install the optical fiber unit according to the steps of S1 to S3, and detect it by the red light pen device. If no optical fiber breakage or signal abnormality is found, the optical fiber unit is considered to be installed qualified. Install the demodulator and the upper computer on the transportation equipment. Connect the rotating connection terminal at the end of the optical fiber unit to the demodulator. Connect the demodulator to the upper computer. Monitor the signal of the optical fiber unit during the high-strength steel transportation process through the upper computer, and record the stress change during the high-strength steel transportation process.
[0016] S1: In the optical fiber winding arrangement, the bending radius of the optical fiber unit at the vertical corner needs to be increased in design. The bending radius position of the optical fiber unit is fixed with paper tape, which can avoid displacement and protect the optical fiber unit. Only the start and end of each circle are fixed, and the two positions are ensured to be on the same axis, which is used to reduce the number of fixed points, and the optical fiber unit can be adjusted more smoothly during the layout process.
[0017] S1: In the optical fiber winding arrangement, the adhesion degree of the optical fiber unit to the high-strength steel coil is maintained. During the layout process of the optical fiber unit, avoid mistakenly thinking that the thick optical fiber unit has strong tensile strength, which may cause excessive tension, especially shear force, during the layout process, thereby causing invisible damage or even breakage to the internal optical fiber unit.
[0018] The working principle of the present application is that the optical fiber unit is wound in the high-strength steel coil, the optical fiber layer structure follows the whole high-strength steel coil to be wound, annealed and transported; thus, the high-strength steel coil can be detected at any time in each process, and the unqualified high-strength steel coil can be avoided to circulate in the production process; in this way, the defective products can be picked out at any time, the generation of defective products is reduced, and the qualified rate of products is improved; on the other hand, the defective products can be found as soon as possible in the production process, and the production cost is reduced.
[0019] Those skilled in the art should understand that the present application is not limited to the above-mentioned embodiments, and the above-mentioned embodiments and descriptions in the specification are only to illustrate the principles of the present application, and various changes and improvements can be made without departing from the spirit and scope of the present application, and these changes and improvements all fall within the scope of the claimed present application.
Claims
1. A high-strength steel winding stress testing method based on optical fiber, characterized by: The specific test methods are as follows: S1: Fiber optic winding arrangement: three dividing lines are drawn along the length of the high-strength steel belt to be wound, and the dividing lines of the steel coil after winding are ensured to be located at 1 / 4, 1 / 2 and 3 / 4 of the radius of the steel coil cross section from the inside to the outside; the first circumferential fiber layer, the second circumferential fiber layer and the third circumferential fiber layer are respectively arranged at the three dividing line positions from the inside to the outside; and two circumferential fiber units are arranged in each circumferential fiber layer; each circumferential fiber layer is separated from each circumferential fiber layer by a layer of high-strength steel belt and axial fiber layers are distributed along the axis of the high-strength steel coil, which are the first axial fiber layer, the second axial fiber layer and the third axial fiber layer from the inside to the outside of the high-strength steel coil; and each axial fiber layer has four axial fiber units evenly distributed along the circumference of the high-strength steel coil; so that 2×3 circumferential fiber units and 4×3 axial fiber units are arranged on each high-strength steel coil; S2: Fiber optic connection: S2.1: One of the optical fiber units in the first circumferential optical fiber layer is fusion-connected to the first optical fiber unit in the first axial optical fiber layer; another optical fiber unit in the first circumferential optical fiber layer is fusion-connected to the second optical fiber unit in the first axial optical fiber layer; and the remaining third optical fiber unit in the first axial optical fiber layer is fusion-connected to the fourth optical fiber unit. S2.2: The fusion splicing method of the second circumferential fiber layer and the second axial fiber layer is the same as S2.1; S2.3: One of the optical fiber units in the third circumferential optical fiber layer is fusion-connected to the first and second optical fiber units in the third axial optical fiber layer; another optical fiber unit in the third circumferential optical fiber layer is fusion-connected to the third and fourth optical fiber units in the third axial optical fiber layer; S3: Leading out the optical fiber unit: The optical fiber unit is led out from the high-strength steel coil in three layers, and the ends of the optical fiber unit are provided with a rotary connection terminal for connecting to the demodulator; S4: Stress testing of high-strength steel coils: Stress testing of high-strength steel coils includes winding stress testing, annealing stress testing and transportation stress testing; S4.1: Winding Stress Test: Install the fiber optic unit according to steps S1 to S3 and test it with a red light pen. If no fiber breakage or signal abnormality is found, the fiber optic unit is considered to have been installed properly. Then, connect the rotating connector at the end of the fiber optic unit to a demodulator. The demodulator is connected to a host computer. The host computer continuously monitors the signal of the fiber optic unit during the high-strength steel winding process and records the stress changes during the high-strength steel winding process. S4.2: Annealing stress test: Install the optical fiber unit according to steps S1 to S3, using a high-temperature sapphire optical fiber unit. Test the unit with a red light pen. If no fiber breakage or signal abnormality is found, the unit is considered to be installed properly. No fiber breakage occurs during the winding process. Lead the end of the optical fiber unit out of the tempering furnace and connect it to a demodulator via the rotary connector at the end of the optical fiber unit. The demodulator is connected to a host computer. The host computer continuously monitors the signal of the optical fiber unit during the high-strength steel tempering process and records the stress changes in the high-strength steel during the tempering process. S4.3: Transfer stress detection: Install the optical fiber unit according to steps S1 to S3, and detect it with a red light pen device. If no optical fiber breakage or signal abnormality is found, the optical fiber unit is considered to have been installed properly. Install the demodulator and the host computer on the transfer equipment, connect the rotary connection terminal at the end of the optical fiber unit to the demodulator, and connect the demodulator to the host computer. Continuously monitor the signal of the optical fiber unit during the transfer of high-strength steel through the host computer, and record the stress changes during the transfer of high-strength steel.
2. The optical fiber-based high-strength steel winding stress testing method according to claim 1, characterized in that: S1: In the optical fiber winding arrangement, the bending radius of the optical fiber unit needs to be increased at the vertical corners of the optical fiber unit; the bending radius position of the optical fiber unit is fixed with paper tape to avoid displacement while protecting the optical fiber unit; it is only fixed at the beginning and end of each circle, and it is ensured that these two positions are on the same axis to reduce the number of fixing points. The optical fiber unit can be adjusted more smoothly during the layout process.
3. The optical fiber-based high-strength steel winding stress testing method according to claim 1, characterized in that: S1: During the optical fiber winding arrangement, the degree of fit between the optical fiber unit and the high-strength steel coil is maintained; during the layout of the optical fiber unit, it is avoided to mistakenly believe that the thick optical fiber unit has a strong tensile strength, resulting in excessive tension, especially shear force, being applied during the layout, thereby causing invisible damage or even breakage to the inside of the optical fiber unit.