CN115533180A - Steel plate shearing method - Google Patents
Steel plate shearing method Download PDFInfo
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- CN115533180A CN115533180A CN202211143521.3A CN202211143521A CN115533180A CN 115533180 A CN115533180 A CN 115533180A CN 202211143521 A CN202211143521 A CN 202211143521A CN 115533180 A CN115533180 A CN 115533180A
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- steel plate
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23D—PLANING; SLOTTING; SHEARING; BROACHING; SAWING; FILING; SCRAPING; LIKE OPERATIONS FOR WORKING METAL BY REMOVING MATERIAL, NOT OTHERWISE PROVIDED FOR
- B23D15/00—Shearing machines or shearing devices cutting by blades which move parallel to themselves
- B23D15/06—Sheet shears
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23D—PLANING; SLOTTING; SHEARING; BROACHING; SAWING; FILING; SCRAPING; LIKE OPERATIONS FOR WORKING METAL BY REMOVING MATERIAL, NOT OTHERWISE PROVIDED FOR
- B23D33/00—Accessories for shearing machines or shearing devices
- B23D33/006—Accessories for shearing machines or shearing devices for obtaining pieces of a predetermined length, e.g. control arrangements
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23D—PLANING; SLOTTING; SHEARING; BROACHING; SAWING; FILING; SCRAPING; LIKE OPERATIONS FOR WORKING METAL BY REMOVING MATERIAL, NOT OTHERWISE PROVIDED FOR
- B23D33/00—Accessories for shearing machines or shearing devices
- B23D33/02—Arrangements for holding, guiding, and/or feeding work during the operation
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23D—PLANING; SLOTTING; SHEARING; BROACHING; SAWING; FILING; SCRAPING; LIKE OPERATIONS FOR WORKING METAL BY REMOVING MATERIAL, NOT OTHERWISE PROVIDED FOR
- B23D33/00—Accessories for shearing machines or shearing devices
- B23D33/12—Equipment for indicating where to cut
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- Mechanical Engineering (AREA)
- Length Measuring Devices By Optical Means (AREA)
Abstract
The invention discloses a steel plate shearing method, and relates to the technical field of steel rolling. Acquiring the head contour of the steel plate, measuring the length of the irregular part of the head according to the head contour, and cutting off the irregular part of the head; acquiring a tail profile of the steel plate, and measuring the length of the irregular part of the tail according to the tail profile; measuring the overall length of the steel plate after the irregular part of the head is cut off; subtracting the length of the irregular part of the tail part from the whole length to obtain the maximum rectangular length; the tail irregularities are cut off according to the maximum rectangular length. Compared with the prior art, the steel plate shearing method provided by the invention has the advantages that the steps of obtaining the head outline of the steel plate, measuring the length of the irregular part of the head according to the head outline, and cutting off the irregular part of the head are adopted, so that the steel plate obtained by shearing is ensured to be the rectangular plate with the largest size, the shearing precision is high, the production efficiency is ensured, the material waste is avoided, the shearing loss is reduced, and the yield is improved.
Description
Technical Field
The invention relates to the technical field of steel rolling, in particular to a steel plate shearing method.
Background
At present, because irregular parts are generated at the head and the tail of a steel plate in the rolling process, after steel rolling is finished, the steel plate needs to be sheared in the length direction of the steel plate to remove the irregular parts, so that the steel plate forms a regular rectangular plate. At present, the maximum rectangular length of a steel plate is generally manually estimated in a shearing mode of the steel plate, and then the steel plate is sheared in the length direction by using a fixed-length shearing machine according to the estimated length, but the condition of insufficient shearing length or excessive shearing length is easy to occur due to large deviation of the estimated length by naked eyes. If the shearing length is insufficient, the obtained steel plate is not a regular rectangular plate, and needs to be sheared again, so that time and labor are wasted, and the production efficiency is reduced; if the shearing length is excessive, the obtained steel plate is not a rectangular plate with the largest size, which causes material waste, increases the shearing loss and reduces the yield.
In view of this, it is important to design a steel plate shearing method with high shearing precision, especially in steel rolling production.
Disclosure of Invention
The invention aims to provide a steel plate shearing method, which can ensure that a steel plate obtained by shearing is a rectangular plate with the largest size, has high shearing precision, ensures the production efficiency, avoids material waste, reduces the cutting loss and improves the yield.
The invention is realized by adopting the following technical scheme.
A steel plate shearing method comprising: acquiring the head contour of the steel plate, measuring the length of the irregular part of the head according to the head contour, and cutting off the irregular part of the head; acquiring a tail profile of the steel plate, and measuring the length of the irregular part of the tail according to the tail profile; measuring the integral length of the steel plate after the irregular part of the head is cut off; subtracting the length of the irregular part of the tail part from the whole length to obtain the maximum rectangular length; the tail irregularities are cut off according to the maximum rectangular length.
Optionally, the step of obtaining a head contour of the steel plate, obtaining a length of the head irregularity measured from the head contour, and cutting off the head irregularity comprises: scanning the head of the steel plate by using a contourgraph to obtain an edge digital signal; processing and correcting the edge digital signal by using a controller to obtain a head outline; measuring, with the controller, a length of the head irregularity based on the head contour; the head irregularities of the steel plate are cut off by a shearing machine.
Optionally, the step of processing and modifying the edge digital signal by using the controller to obtain the head contour includes: iteratively calculating edge values in the length direction of the steel plate according to the edge digital signals, and connecting edge points corresponding to part of the edge values into an edge curve so as to enable the projection of the edge curve in the length direction of the steel plate to be shortest; correcting a plurality of edge points on an edge curve through normal distribution, and eliminating interference points which do not meet conditions; and correcting the weight of the rest edge points through the weight coefficient to obtain actual edge points, and connecting the actual edge points into a head profile.
Optionally, the step of iteratively calculating an edge value in the length direction of the steel plate according to the edge digital signal, and connecting edge points corresponding to a part of the edge values into an edge curve, so that a projection of the edge curve in the length direction of the steel plate is the shortest includes: iteratively calculating the edge value using a first formula, wherein the first formula is:
wherein k represents the kth value of the N edge values; l is k Represents a kth value in a longitudinal direction of the steel sheet; x k Representing the actual value, X l The predicted value is represented.
Optionally, the step of correcting the plurality of edge points on the edge curve through normal distribution and eliminating the interference points that do not meet the condition includes: and correcting the plurality of edge points by using a second formula, wherein the second formula is as follows:
wherein x represents a pixel coordinate; y represents a gray value; δ is a normal distribution parameter.
Optionally, the step of correcting the weights of the remaining edge points by using the weight coefficients to obtain actual edge points, and connecting the actual edge points into a head contour includes: and correcting the weight of the edge point by using a third formula, wherein the third formula is as follows: f (x, y) = W -1 ∑∑g(x,y) w (ii) a Wherein W is a weight coefficient.
Optionally, a laser light curtain is arranged in front of the shearing machine, a distance between the laser light curtain and an inlet of the shearing machine is a first distance, a distance between the inlet of the shearing machine and an outlet of the shearing machine is a second distance, and the step of measuring the overall length of the steel plate after the irregular part of the head is cut off comprises: the steel plate sequentially passes through the laser light curtain and the shearing machine, and when the tail of the steel plate leaves the laser light curtain, the extending length of the steel plate extending out of an outlet of the shearing machine is measured; and adding the first distance, the second distance and the extension length to obtain the overall length.
Optionally, the step of obtaining a tail profile of the steel plate and obtaining a length of the tail irregular part according to the tail profile measurement includes: scanning the tail of the steel plate by using a contourgraph to obtain an edge digital signal; processing and correcting the edge digital signal by using a controller to obtain a tail profile; the length of the tail irregularity is measured from the tail profile using the controller.
Optionally, before the step of cutting off the irregular part of the tail according to the maximum rectangular length, the steel plate shearing method further comprises: and checking the maximum rectangle length.
Optionally, a scale is arranged on one side of the steel plate, a laser trolley is arranged on the other side of the steel plate, the length direction of the scale is the same as that of the steel plate, the laser trolley is used for emitting laser to vertically irradiate the scale, and the step of checking the maximum rectangular length comprises the following steps: and controlling the laser trolley to move along the length direction of the steel plate for the maximum rectangular length from one end of the tail irregular part close to the steel plate, and manually observing whether the laser emitted by the laser trolley is flush with the head of the steel plate.
The steel plate shearing method provided by the invention has the following beneficial effects:
the steel plate shearing method provided by the invention comprises the steps of obtaining the head outline of a steel plate, measuring the length of an irregular part of the head according to the head outline, and cutting off the irregular part of the head; acquiring a tail profile of the steel plate, and measuring the length of the irregular part of the tail according to the tail profile; measuring the overall length of the steel plate after the irregular part of the head is cut off; subtracting the length of the irregular part of the tail part from the whole length to obtain the maximum rectangular length; the tail irregularities are cut off according to the maximum rectangular length. Compared with the prior art, the steel plate shearing method provided by the invention has the advantages that the steps of obtaining the head outline of the steel plate, measuring the length of the irregular part of the head according to the head outline, and cutting off the irregular part of the head are adopted, so that the steel plate obtained by shearing is ensured to be the rectangular plate with the largest size, the shearing precision is high, the production efficiency is ensured, the material waste is avoided, the shearing loss is reduced, and the yield is improved.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and those skilled in the art can also obtain other related drawings based on the drawings without inventive efforts.
Fig. 1 is a schematic structural diagram of a steel plate shearing apparatus applied to a steel plate shearing method according to an embodiment of the present invention;
fig. 2 is a block diagram illustrating steps of a steel plate shearing method according to an embodiment of the present invention.
Icon: 100-a steel plate shearing device; 110-rollgang; 120-a profiler; 130-a light curtain generator; 131-a laser light curtain; 140-a shear; 141-a cutter; 150-a check component; 151-carrying roller table; 152-a scale; 153-laser dolly; 154-a guide rail; 200-steel plate.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.
In the description of the present invention, it should be noted that the terms "inside", "outside", "upper", "lower", "horizontal", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings or orientations or positional relationships conventionally put in use of products of the present invention, and are only for convenience of description and simplicity of description, but do not indicate or imply that the devices or elements referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," and the like are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "connected," "mounted," and "connected" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
Some embodiments of the invention are described in detail below with reference to the accompanying drawings. Features in the embodiments described below may be combined with each other without conflict.
Referring to fig. 1 and fig. 2 in combination, an embodiment of the present invention provides a steel plate shearing method for shearing a steel plate 200. The steel plate shearing device can ensure that the steel plate 200 obtained by shearing is a rectangular plate with the largest size, the shearing precision is high, the production efficiency is ensured, the material waste is avoided, the cutting loss is reduced, and the yield is improved.
It should be noted that the steel plate shearing method is applied to the steel plate shearing apparatus 100, and the steel plate shearing apparatus 100 includes a rollgang 110, a profiler 120, a controller (not shown), a light curtain generator 130, a shearing machine 140, and a checking assembly 150. The controller is electrically connected with the rollgang 110, the contourgraph 120, the light curtain generator 130, the shearing machine 140 and the checking assembly 150 at the same time so as to realize an electric control function; the conveying roller way 110 is used for driving the rolled steel plate 200 to feed forward along the length direction; the contourgraph 120, the light curtain generator 130, the shearing machine 140 and the checking assembly 150 are sequentially arranged along the feeding direction of the steel plate 200; the profiler 120 is used for acquiring the profile of the steel plate 200; the light curtain generator 130 is used for emitting a laser light curtain 131; the shear 140 is used to cut the steel sheet 200; the checking assembly 150 is used to check the maximum rectangular length of the steel plate 200.
Specifically, the checking assembly 150 includes a carrying roller bed 151, a scale 152, a laser carriage 153, and a guide rail 154. The bearing roller way 151 is used for bearing the steel plate 200 and driving the steel plate 200 to advance forwards along the length direction of the steel plate, the scale 152 and the guide rail 154 are arranged on two sides of the bearing roller way 151 relatively, the laser trolley 153 is arranged on the guide rail 154 in a sliding mode, namely the scale 152 and the laser trolley 153 are arranged on two sides of the bearing roller way 151 relatively, and the scale 152 and the laser trolley 153 are arranged on two sides of the steel plate 200 relatively. The length direction of the scale 152 is the same as the length direction of the steel plate 200, and the length direction of the guide rail 154 is the same as the length direction of the steel plate 200. The laser carriage 153 is capable of moving relative to the guide rail 154 along the length direction of the steel plate 200, and the laser carriage 153 is also capable of emitting laser light perpendicularly onto the scale 152 to perform a calibration function.
The steel plate shearing method comprises the following steps:
step S110: the head contour of the steel plate 200 is acquired, the length of the head irregularity portion is obtained from the head contour measurement, and the head irregularity portion is cut off.
Specifically, step S110 includes three steps, which are respectively:
step S111: the head of the steel plate 200 is scanned by the profiler 120 to obtain an edge digital signal.
In step S111, the steel plate 200 is advanced by the roller conveyor 110 to pass the head of the steel plate 200 through the profiler 120. The profiler 120 applies a stereoscopic vision measurement principle and uses two linear array CCD cameras as sensors to scan the edge position of the head of the steel plate 200 at the same time to obtain an edge digital signal, and sends the edge digital signal to the controller.
Specifically, two linear array CCD cameras are arranged at intervals along the width direction of the steel plate 200, the two linear array CCD cameras are both arranged obliquely, the inclination angle is adjusted so that the field of view of each linear array CCD camera can cover at least half of the area of the steel plate 200, the two side edges of the steel plate 200 have clear images on the two corresponding linear array CCD cameras during measurement, the spatial coordinates of each point location on the two side edges of the steel plate 200 can be calculated according to the geometrical relationship of stereoscopic vision, and the spatial coordinates of a plurality of point locations are combined to obtain an edge digital signal.
Step S112: and processing and correcting the edge digital signals by using a controller to obtain the head outline.
It should be noted that, in step S112, since the steel plate 200 vibrates during the forward feeding process during the actual production process, so that the steel plate 200 repeatedly switches back and forth between the deformed state and the reset state, the edge digital signal scanned by the profiler 120 is inaccurate, where the spatial coordinates of a part of the point locations are measured when the steel plate 200 is in the deformed state, and the spatial coordinates of another part of the point locations are measured when the steel plate 200 is in the reset state, which may greatly interfere with the generation of the actual head contour of the steel plate 200, and affect the shearing accuracy. Therefore, the controller is required to process and correct the edge digital signals to eliminate the spatial coordinates of the point locations measured when the steel plate 200 is in a deformed state, so as to reduce the measurement error and ensure that the steel plate 200 obtained by shearing is a rectangular plate with the largest size.
Further, step S112 includes three steps, which are respectively:
step S1121: and iteratively calculating edge values in the length direction of the steel plate 200 according to the edge digital signals, and connecting edge points corresponding to part of the edge values into an edge curve so as to make the projection of the edge curve in the length direction of the steel plate 200 shortest.
It should be noted that, in step S1121, the edge value is iteratively calculated by using the first formula, and the edge value is repeatedly corrected in a recursive manner until the edge value reaches the preset accuracy; then marking a plurality of edge points corresponding to the plurality of edge values; then, a part of the edge points is selected from the plurality of edge points and connected into an edge curve, so that the projection of the edge curve in the length direction of the steel plate 200 is shortest, the cutting loss is reduced as much as possible, the yield is improved, and the material waste is avoided.
Specifically, the first formula is:
wherein k represents the kth value of the N edge values; l is k Represents the kth value in the length direction of the steel sheet 200; x k Denotes the actual value, X l Indicating the predicted value.
Step S1122: and correcting a plurality of edge points on the edge curve through normal distribution, and eliminating interference points which do not meet the conditions.
It should be noted that, in step S1122, the plurality of edge points are corrected by using the second formula, from the actual production experience, the edge curve conforms to the normal distribution rule, the plurality of edge points on the edge curve are corrected by the normal distribution, the edge points that do not conform to the conditions are regarded as interference points, and the interference points are removed, so as to reduce the measurement error caused by the vibration of the steel plate 200, and ensure the shearing accuracy.
Specifically, the second formula is:
wherein x represents a pixel coordinate; y represents a gray value; δ is a normal distribution parameter.
Step S1123: and correcting the weight of the rest edge points through the weight coefficient to obtain actual edge points, and connecting the actual edge points into a head profile.
In step S1123, the weights of the edge points are corrected by using the third formula, and each edge point is weighted or weighted to obtain a plurality of actual edge points, so as to further reduce the measurement error caused by the vibration of the steel plate 200 and ensure the shearing accuracy; the actual edge points are then connected to form a head profile, which is the true profile of the head of the steel plate 200.
Specifically, the third formula is: f (x, y) = W -1 ∑∑g(x,y) w ；
Wherein W is a weight coefficient.
Step S113: the length of the head irregularity is measured from the head profile using the controller.
In step S113, since the head of the steel plate 200 has an irregular portion, the length of the irregular portion of the head in the length direction of the steel plate 200 can be measured by the head profile, so as to facilitate the subsequent shearing, and ensure that the sheared steel plate 200 is a rectangular plate with the largest size.
Step S114: the head irregularities of the steel plate 200 are cut off using the shears 140.
In step S114, the steel plate 200 is driven by the roller conveyor 110 to advance forward, so that the head passes through the laser light curtain 131 and enters the shearing machine 140. The shearer 140 shears the steel plate 200 according to the length of the head irregularity to cut off the head irregularity of the steel plate 200. Specifically, a cutter 141 is arranged in the shearing machine 140, the steel plate 200 gradually passes through a position corresponding to the cutter 141 in the forward feeding process, when the length of the steel plate 200 passing through the cutter 141 is equal to the length of the irregular head part, the transportation roller table 110 is controlled to pause, the shearing machine 140 is started, the irregular head part is cut off by the cutter 141, and the plane of the cutter 141 is perpendicular to the length direction of the steel plate 200, so that the head part of the cut steel plate 200 is flush and regular and serves as the head end of the rectangular plate.
Step S120: the tail profile of the steel plate 200 is acquired, and the length of the tail irregularity is measured from the tail profile.
It should be noted that, in step S120, the steel plate 200 is driven to continue to advance by the transportation roller table 110 and the bearing roller table 151 synchronously, so that the tail of the steel plate 200 passes through the profiler 120, and in the process, the head of the steel plate 200 extends out of the shearing machine 140 and moves onto the bearing roller table 151. Firstly, scanning the tail part of a steel plate 200 by using a profiler 120 to obtain an edge digital signal; then, processing and correcting the edge digital signal by using a controller to obtain a tail profile; the length of the tail irregularity is then measured from the tail profile using the controller.
In this embodiment, the step of measuring the length of the tail irregular part is the same as the step of measuring the length of the head irregular part, and is not described herein again.
Step S130: the entire length of the steel plate 200 after cutting off the head irregularity is measured.
In this embodiment, the laser light curtain 131 is disposed in front of the shearing machine 140, and the shearing machine 140 is disposed with an inlet and an outlet opposite to each other, a distance between the laser light curtain 131 and the inlet of the shearing machine 140 is a first distance, and a distance between the inlet of the shearing machine 140 and the outlet of the shearing machine 140 is a second distance.
In step S130, the steel plate 200 is driven by the roller table 151 to move forward, so that the tail of the steel plate 200 passes through the laser light curtain 131. When the tail part of the steel plate 200 leaves the laser light curtain 131, controlling the bearing roller bed 151 to pause, and measuring the extension length of the steel plate 200 extending out of the outlet of the shearing machine 140; and adding the first distance, the second distance and the extension length to obtain the overall length.
Step S140: the length of the tail irregular part is subtracted from the overall length to obtain the maximum rectangular length.
It should be noted that, in step S140, the overall length is the length of the steel plate 200 after the head irregular portion is cut off, and the maximum rectangular length can be obtained by subtracting the length of the tail irregular portion from the overall length, so as to obtain the rectangular plate with the maximum size, the shearing accuracy is high, the production efficiency is ensured, the material waste is avoided, the cutting loss is reduced, and the yield is improved.
Step S150: and checking the maximum rectangle length.
In step S150, the laser trolley 153 is controlled to move from the end of the tail irregular part close to the steel plate 200 along the length direction of the steel plate 200 by the maximum rectangular length, and whether the laser emitted by the laser trolley 153 is flush with the head of the steel plate 200 is manually observed. At this time, the head of the steel plate 200 is a plane perpendicular to the length direction of the steel plate 200, and if the laser emitted by the laser trolley 153 is flush with the head of the steel plate 200, the maximum rectangular length is verified to be correct; if the laser beam emitted from the laser trolley 153 has a certain distance with the head of the steel plate 200 in the length direction of the steel plate 200, it indicates that the maximum rectangle length is calculated by mistake, and manual confirmation is required.
Step S160: the tail irregularities are cut off according to the maximum rectangular length.
In step S160, the steel plate 200 is driven by the roller table 151 to advance forward, so that the tail of the steel plate 200 enters the shearing machine 140. The shearing machine 140 shears the steel plate 200 according to the maximum rectangular length to cut off the irregular portion of the tail of the steel plate 200. Specifically, after the irregular part of the head is cut off, the remaining steel plate 200 is continuously fed forward under the driving of the conveying roller way 110 and the bearing roller way 151, when the length of the remaining steel plate 200 passing through the cutter 141 is equal to the maximum rectangular length, the bearing roller way 151 is controlled to pause, the shearing machine 140 is started, the irregular part of the tail is cut off by the cutter 141, and the plane where the cutter 141 is located is perpendicular to the length direction of the steel plate 200, so that the tail of the cut steel plate 200 is flush and regular and serves as the tail end of the rectangular plate.
According to the steel plate shearing method provided by the embodiment of the invention, the head contour of the steel plate 200 is obtained, the length of the irregular part of the head is obtained according to the head contour measurement, and the irregular part of the head is cut off; measuring the overall length of the steel plate 200 after the head irregular part is cut off; acquiring the tail profile of the steel plate 200, and measuring the length of the irregular part of the tail according to the tail profile; subtracting the length of the irregular part of the tail part from the whole length to obtain the maximum rectangular length; the tail irregularities are cut off according to the maximum rectangular length. Compared with the prior art, the steel plate shearing method provided by the invention adopts the steps of obtaining the head outline of the steel plate 200, measuring the length of the irregular part of the head according to the head outline, and cutting off the irregular part of the head, so that the steel plate 200 obtained by shearing is ensured to be a rectangular plate with the largest size, the shearing precision is high, the production efficiency is ensured, the material waste is avoided, the shearing loss is reduced, and the yield is improved.
The present invention has been described in terms of the preferred embodiment, and it is not intended to be limited to the embodiment. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. A method of shearing a steel sheet, comprising:
acquiring a head contour of a steel plate (200), measuring the length of an irregular head part according to the head contour, and cutting off the irregular head part;
acquiring a tail profile of the steel plate (200), and measuring the length of the irregular tail part according to the tail profile;
measuring the overall length of the steel plate (200) after the head irregularity is cut off;
subtracting the length of the irregular tail part from the whole length to obtain the maximum rectangular length;
cutting off the tail irregularity according to the maximum rectangular length.
2. A steel plate shearing method as claimed in claim 1, wherein said step of obtaining a head profile of the steel plate (200), obtaining a length of the head irregularity measured from said head profile, and cutting said head irregularity comprises:
scanning the head of the steel plate (200) by using a profiler (120) to obtain an edge digital signal;
processing and correcting the edge digital signal by using a controller to obtain the head outline;
measuring, with the controller, a length of the head irregularity from the head contour;
cutting off the head irregularity of the steel plate (200) with a shear (140).
3. The method of claim 2, wherein the step of processing and modifying the edge digital signal by the controller to obtain the head profile comprises:
iteratively calculating edge values in the length direction of the steel plate (200) according to the edge digital signals, and connecting edge points corresponding to part of the edge values into an edge curve so as to enable the projection of the edge curve in the length direction of the steel plate (200) to be shortest;
correcting the edge points on the edge curve through normal distribution, and eliminating interference points which do not meet conditions;
and correcting the weights of the rest edge points through the weight coefficient to obtain actual edge points, and connecting the actual edge points into the head contour.
4. The steel plate shearing method according to claim 3, wherein the step of iteratively calculating edge values in the length direction of the steel plate (200) according to the edge digital signals and connecting edge points corresponding to part of the edge values into an edge curve so as to make the projection of the edge curve in the length direction of the steel plate (200) shortest comprises the following steps:
iteratively calculating the edge value using a first formula, wherein the first formula is:
wherein k represents the kth value of the N said edge values; l is k Represents a k-th value in a longitudinal direction of the steel plate (200); x k Denotes the actual value, X l Indicating the predicted value.
5. A steel plate shearing method as claimed in claim 4, wherein said step of correcting said plurality of edge points on said edge curve by normal distribution and eliminating the non-compliant interference points comprises:
correcting the plurality of edge points by using a second formula, wherein the second formula is as follows:
wherein x represents a pixel coordinate; y represents a gray value; δ is a normal distribution parameter.
6. A method for shearing a steel plate according to claim 5, wherein said step of correcting the weight of the remaining edge points by a weight coefficient to obtain actual edge points and connecting a plurality of said actual edge points into said head contour comprises:
correcting the weight of the edge point by using a third formula, wherein the third formula is as follows:
f(x,y)＝W -1 ∑∑g(x,y) w ；
wherein W is a weight coefficient.
7. The method for shearing a steel plate according to claim 1, wherein a laser light curtain (131) is arranged in front of the shearing machine (140), the laser light curtain (131) is spaced from an inlet of the shearing machine (140) by a first distance, the inlet of the shearing machine (140) is spaced from an outlet of the shearing machine (140) by a second distance, and the step of measuring the overall length of the steel plate (200) after the irregular part of the head is cut off comprises the following steps:
sequentially passing the steel plate (200) through the laser light curtain (131) and the shearing machine (140), and measuring the extending length of the steel plate (200) extending out of the outlet of the shearing machine (140) when the tail of the steel plate (200) leaves the laser light curtain (131);
adding the first spacing, the second spacing, and the extension length to obtain the overall length.
8. A method of shearing a steel sheet as in claim 1, wherein said step of obtaining a tail profile of said steel sheet (200) and measuring the length of the tail irregularity from said tail profile comprises:
scanning the tail of the steel plate (200) by using a profiler (120) to obtain an edge digital signal;
processing and correcting the edge digital signal by using a controller to obtain the tail profile;
measuring, with the controller, a length of the tail irregularity from the tail profile.
9. A method of shearing a steel plate as in claim 1 wherein prior to the step of cutting the tail irregularity according to the maximum rectangular length, the method further comprises:
and checking the length of the maximum rectangle.
10. The steel plate shearing method according to claim 9, wherein a scale (152) is arranged on one side of the steel plate (200), a laser trolley (153) is arranged on the other side of the steel plate, the length direction of the scale (152) is the same as the length direction of the steel plate (200), the laser trolley (153) is used for emitting laser to vertically irradiate the scale (152), and the step of checking the maximum rectangular length comprises the following steps:
and controlling the laser trolley (153) to move along the length direction of the steel plate (200) from one end of the tail irregular part close to the steel plate (200) by the maximum rectangular length, and manually observing whether the laser emitted by the laser trolley (153) is flush with the head of the steel plate (200).
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116140682A (en) * | 2023-03-13 | 2023-05-23 | 甘肃沃德佳铝业有限公司 | Method for fixing and installing upright lockstitch edge for aluminum veneer |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116140682A (en) * | 2023-03-13 | 2023-05-23 | 甘肃沃德佳铝业有限公司 | Method for fixing and installing upright lockstitch edge for aluminum veneer |
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