Method for preventing mistaken shearing of stacked steel plates on line
By installing a distance measuring sensor on the steel plate conveying roller to detect the thickness and passing time of the steel plate, the problem of mis-shearing of steel plate stacks is solved, precise detection and production stability are achieved, and equipment damage and cost are reduced.
Patent Information
- Application Number
- CN202510596214.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-05-09
- Publication Date
- 2025-07-25
AI Technical Summary
The prior art causes mis-shearing of stacks when steel plates are mounted and down, resulting in equipment damage and low production efficiency.
The first and second ranging sensors are installed above and below the steel plate conveying rollers, and the thickness and passing time of the steel plate are measured and the preset threshold is used to prevent mis-shearing of the steel plate stacking.
It improves detection accuracy and reliability, avoids tool wear and equipment failure, reduces waste production, and improves production efficiency and economic benefits.
Smart Images
Figure CN120362582A_ABST
Abstract
Description
Technical Field
[0001] The present invention relates to the technical field of steel plate manufacturing, and particularly to a method for preventing mis-shearing of stacked steel plates during online operation. Background Art
[0002] When the steel plates are loaded and unloaded, due to the different sizes of the produced steel plates, the sizes are different when stacking, resulting in the small-sized plates being under the large-sized plates during hoisting. Since the crane operators cannot observe, they will be hoisted simultaneously, leading to abnormal shearing and equipment damage after being online. Currently, there are many deficiencies in the existing methods for detecting stacked steel plates. Some detection means rely on manual visual inspection, which has low efficiency and is prone to omissions, and it is difficult to accurately and timely detect the stacking situation in a high-speed production environment. Some detection methods using a single sensor are greatly affected by environmental factors such as light and the reflection of the steel plate surface, with limited detection accuracy and prone to misjudgment. When the steel plates are stacked and not detected in time and then shearing operation is carried out, the tool will bear excessive pressure, causing tool wear or even damage. It may also lead to the size and shape of the sheared steel plates not meeting the requirements, becoming waste products, and at the same time triggering equipment failures, resulting in unplanned shutdowns, increasing production costs, and reducing production efficiency. Summary of the Invention
[0003] The technical problem to be solved by the present invention is to overcome the shortcomings of the prior art and provide a method for preventing mis-shearing of stacked steel plates during online operation.
[0004] To solve the above technical problems, the technical solution of the present invention is as follows: A method for preventing mis-shearing of stacked steel plates during online operation includes: Installing a first distance sensor and a second distance sensor above and below the steel plate conveying roller table respectively; Measuring the thickness of the steel plate conveyed on the steel plate conveying roller table by the first distance sensor and the second distance sensor; Comparing the thickness of the steel plate measured by the first distance sensor and the second distance sensor with a preset steel plate thickness threshold. If the steel plate thickness is outside the threshold range, it is preliminarily determined that the steel plates are stacked.
[0005] As a preferred solution of the method for preventing mis-shearing of stacked steel plates during online operation according to the present invention, wherein: while measuring the thickness of the steel plate conveyed on the steel plate conveying roller table by the first distance sensor and the second distance sensor, it further includes: Measuring the passing time of the steel plate conveyed on the steel plate conveying roller table by the first distance sensor and the second distance sensor.
[0006] As a preferred embodiment of the method for preventing mis-shearing of stacked steel plates during online feeding in the present invention, the following steps are included: After comparing the thicknesses of the steel plates measured by the first distance measuring sensor and the second distance measuring sensor with a preset steel plate thickness threshold, and preliminarily determining that there is a stack of steel plates if the steel plate thickness is outside the threshold range, the method further includes: Compare the measured passing time of the steel plate with a preset passing time threshold for the steel plate. If the measured passing time of the steel plate is outside the preset passing time threshold range, it is determined that there is a stack of steel plates.
[0007] As a preferred embodiment of the method for preventing mis-shearing of stacked steel plates during online feeding in the present invention, the following steps are included: After determining that there is a stack of steel plates, the method further includes: Control the shearing device to stop running.
[0008] As a preferred embodiment of the method for preventing mis-shearing of stacked steel plates during online feeding in the present invention, the following steps are included: While controlling the shearing device to stop running, the method further includes: Control the alarm device to run.
[0009] As a preferred embodiment of the method for preventing mis-shearing of stacked steel plates during online feeding in the present invention, the first distance measuring sensor and the second distance measuring sensor are arranged in alignment in the vertical direction, and the detection directions of the first distance measuring sensor and the second distance measuring sensor are both perpendicular to the surface of the steel plate.
[0010] As a preferred embodiment of the method for preventing mis-shearing of stacked steel plates during online feeding in the present invention, measuring the thickness of the steel plate conveyed on the steel plate conveying roller path by the first distance measuring sensor and the second distance measuring sensor includes: Respectively obtain the distances between the first distance measuring sensor and the second distance measuring sensor and the steel plate; Calculate the thickness of the steel plate through the formula: steel plate thickness = distance between the first distance measuring sensor and the second distance measuring sensor - (distance between the first distance measuring sensor and the steel plate + distance between the second distance measuring sensor and the steel plate).
[0011] The beneficial effects of the present invention are as follows: (1) The present invention uses two sensors, an upper one and a lower one, to cooperate in detection, can more accurately obtain the steel plate thickness information, reduce the interference of environmental factors, effectively improve the accuracy and reliability of detection, and reduce the misjudgment rate.
[0012] (2) The present invention preliminarily determines the stacking situation of the steel plates by measuring the steel plate thickness, and then comprehensively analyzes the stacking situation of the steel plates through the passing time of the steel plates, further improving the detection accuracy and reliability.
[0013] (3) The present invention can detect the stacking of steel plates in a timely manner and stop shearing, avoiding the wear or damage of the cutting tool due to excessive pressure, prolonging the service life of the cutting tool, reducing the occurrence of equipment failures, and lowering the equipment maintenance cost. Calculated based on 3 sets of damaged tools per year, with each set costing 200,000 yuan, 600,000 yuan can be saved annually.
[0014] (4) The present invention reduces the generation of waste products and improves the product quality. At the same time, it avoids unplanned shutdowns, ensures the continuity of production, enhances the overall production efficiency, and increases the economic benefits of the enterprise. BRIEF DESCRIPTION OF THE DRAWINGS
[0015] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for the description of the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.
[0016] Figure 1 It is a schematic diagram of the detection principle of the method for preventing mis-shearing of stacked steel plates from being fed online provided by the present invention. DETAILED DESCRIPTION OF THE EMBODIMENTS
[0017] To make the content of the present invention easier to be clearly understood, the present invention will be further described in detail below according to the specific embodiments in combination with the drawings.
[0018] The embodiments of the present application provide a method for preventing mis-shearing of stacked steel plates from being fed online. The method specifically includes the following steps: Step S101: Install a first distance sensor and a second distance sensor above and below the steel plate conveying roller path respectively.
[0019] Specifically, install a first distance sensor and a second distance sensor at appropriate positions above and below the steel plate conveying roller path. Among them, the first distance sensor is used to detect the distance between the upper surface of the steel plate on the steel plate conveying roller path and the first distance sensor. The second distance sensor is used to detect the distance between the lower surface of the steel plate on the steel plate conveying roller path and the second distance sensor.
[0020] Figure 1 It is a schematic diagram of the detection principle of the method for preventing mis-shearing of stacked steel plates from being fed online in the embodiments of the present application. Refer to Figure 1 , the first distance sensor and the second distance sensor are arranged vertically aligned. The detection direction of the first distance sensor is vertically downward, the detection direction of the second distance sensor is vertically upward, and the detection directions of the first distance sensor and the second distance sensor are both perpendicular to the steel plate surface.
[0021] Step S102: Measure the thickness of the steel plate conveyed on the steel plate conveying roller table by the first distance measuring sensor and the second distance measuring sensor.
[0022] Specifically, after the distances between the first distance measuring sensor and the second distance measuring sensor and the steel plate are measured respectively, the thickness of the steel plate can be calculated by the formula "Steel plate thickness = Distance between the first distance measuring sensor and the second distance measuring sensor - (Distance between the first distance measuring sensor and the steel plate + Distance between the second distance measuring sensor and the steel plate)".
[0023] It should be noted that while measuring the thickness of the steel plate conveyed on the steel plate conveying roller table by the first distance measuring sensor and the second distance measuring sensor, the first distance measuring sensor and the second distance measuring sensor can also measure the passing time of the steel plate conveyed on the steel plate conveying roller table. The specific measurement principle is as follows: Record the first time signal when the first distance measuring sensor and the second distance measuring sensor detect the steel plate signal, and record the second time signal when the second distance measuring sensor and the second distance measuring sensor do not detect the steel plate signal. The passing time of the steel plate can be obtained by calculating the difference between these two time signals.
[0024] Step S103: Compare the thickness of the steel plate measured by the first distance measuring sensor and the second distance measuring sensor with a preset steel plate thickness threshold. If the steel plate thickness is outside the threshold range, it is initially determined that there is a stack of steel plates.
[0025] Specifically, preset the threshold range [Hmin, Hmax] of the normal steel plate thickness in the control system. Then compare the actually measured steel plate thickness by the distance measuring sensor with the above threshold range. When the actually measured steel plate thickness exceeds this threshold range, it is initially determined that there may be a situation of stacked steel plates.
[0026] It should be noted that to avoid misjudgment, it is necessary to further comprehensively analyze information such as the time interval of the steel plate passing. Compare the measured passing time of the steel plate with a preset steel plate passing time threshold. If the measured passing time of the steel plate is outside the preset steel plate passing time threshold range, it is determined that there is a stack of steel plates.
[0027] Once the control system confirms that there is a stack of steel plates, immediately send a stop signal to the shearing device to stop the shearing operation and prevent mis-shearing. At the same time, the control system triggers an alarm device to notify the operator to come and handle it in the form of sound, light, etc. After the operator clears the stacked steel plates, perform a manual reset operation on the control system to resume the normal production process.
[0028] It should be noted that if the actually measured steel plate thickness exceeds this threshold range, it is initially determined that there may be a situation of steel plate stacking. However, if the passing time of the measured steel plate is within the predicted time threshold range, a low-level alarm prompt can be given to remind the staff to confirm whether there is steel plate stacking.
[0029] Thus, the technical solution of this application uses two sensors to prevent unplanned shutdown caused by mis-shearing of stacked steel plates. By accurately detecting the state of the steel plates, the situation of steel plate stacking can be timely discovered, avoiding damage to the cutting tools and equipment caused by mis-shearing, reducing the generation of unplanned waste of steel plates, improving the stability and continuity of production, reducing production costs, and greatly enhancing production efficiency.
[0030] In addition to the above embodiments, the present invention may also have other implementation manners; all technical solutions formed by equivalent replacement or equivalent transformation fall within the protection scope required by the present invention.
Claims
1. A method for preventing mis-shearing when stacking steel plates on the production line, characterized in that: Including: Install a first distance measuring sensor and a second distance measuring sensor above and below the steel plate conveying roller table respectively; Measure the thickness of the steel plate conveyed on the steel plate conveying roller table through the first distance measuring sensor and the second distance measuring sensor; Compare the thickness of the steel plate measured by the first distance measuring sensor and the second distance measuring sensor with a preset steel plate thickness threshold. If the steel plate thickness is outside the threshold range, it is preliminarily determined that there is a stack of steel plates.
2. The method for preventing mis-shearing during the online stacking of steel plates according to claim 1, characterized in that: While measuring the thickness of the steel plate conveyed on the steel plate conveying roller table through the first distance measuring sensor and the second distance measuring sensor, it also includes: Measure the passing time of the steel plate conveyed on the steel plate conveying roller table through the first distance measuring sensor and the second distance measuring sensor.
3. The method for preventing mis-shearing during the online stacking of steel plates according to claim 2, wherein: After comparing the thickness of the steel plate measured by the first distance measuring sensor and the second distance measuring sensor with a preset steel plate thickness threshold, if the steel plate thickness is outside the threshold range, and it is preliminarily determined that there is a stack of steel plates, it also includes: Compare the measured passing time of the steel plate with a preset steel plate passing time threshold. If the measured passing time of the steel plate is outside the preset steel plate passing time threshold range, it is determined that there is a stack of steel plates.
4. The method for preventing mis-shearing during the online stacking of steel plates according to claim 3, characterized in that: After determining that there is a stack of steel plates, it also includes: Control the shearing equipment to stop running.
5. The method for preventing mis-shearing during the online stacking of steel plates according to claim 4, wherein: While controlling the shearing equipment to stop running, it also includes: Control the alarm device to operate.
6. The method for preventing mis-shearing during the online stacking of steel plates according to claim 1, characterized in that: The first distance measuring sensor and the second distance measuring sensor are arranged in alignment in the vertical direction, and the detection directions of the first distance measuring sensor and the second distance measuring sensor are both perpendicular to the surface of the steel plate.
7. The method for preventing mis-shearing during the online stacking of steel plates according to claim 1, characterized in that: Measuring the thickness of the steel plate conveyed on the steel plate conveying roller table through the first distance measuring sensor and the second distance measuring sensor includes: Obtain the distances between the first distance measuring sensor and the second distance measuring sensor and the steel plate respectively; Calculate the thickness of the steel plate through the formula: steel plate thickness = distance between the first distance measuring sensor and the second distance measuring sensor - (distance between the first distance measuring sensor and the steel plate + distance between the second distance measuring sensor and the steel plate).