CN117655209B - Metal plate cutting device and cutting early warning method thereof - Google Patents
Metal plate cutting device and cutting early warning method thereof Download PDFInfo
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- CN117655209B CN117655209B CN202410132478.3A CN202410132478A CN117655209B CN 117655209 B CN117655209 B CN 117655209B CN 202410132478 A CN202410132478 A CN 202410132478A CN 117655209 B CN117655209 B CN 117655209B
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- 239000002184 metal Substances 0.000 title claims abstract description 28
- 229910052751 metal Inorganic materials 0.000 title claims abstract description 28
- 238000005520 cutting process Methods 0.000 title claims abstract description 24
- 238000000034 method Methods 0.000 title claims abstract description 21
- 238000004080 punching Methods 0.000 claims abstract description 100
- 238000012545 processing Methods 0.000 claims abstract description 30
- 238000001514 detection method Methods 0.000 claims description 17
- 238000013441 quality evaluation Methods 0.000 claims description 12
- 210000001503 joint Anatomy 0.000 claims description 11
- 238000003860 storage Methods 0.000 claims description 10
- 238000000605 extraction Methods 0.000 claims description 6
- 238000007689 inspection Methods 0.000 claims description 6
- 238000003908 quality control method Methods 0.000 claims description 6
- 235000017166 Bambusa arundinacea Nutrition 0.000 claims description 5
- 235000017491 Bambusa tulda Nutrition 0.000 claims description 5
- 241001330002 Bambuseae Species 0.000 claims description 5
- 235000015334 Phyllostachys viridis Nutrition 0.000 claims description 5
- 239000011425 bamboo Substances 0.000 claims description 5
- 238000012937 correction Methods 0.000 claims description 3
- 230000002146 bilateral effect Effects 0.000 claims description 2
- 230000001960 triggered effect Effects 0.000 claims description 2
- 239000007787 solid Substances 0.000 claims 1
- 239000002699 waste material Substances 0.000 abstract description 7
- 230000000694 effects Effects 0.000 abstract description 4
- 238000005498 polishing Methods 0.000 description 4
- 230000008901 benefit Effects 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 238000003754 machining Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 238000005034 decoration Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000010814 metallic waste Substances 0.000 description 1
- 238000003032 molecular docking Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D28/00—Shaping by press-cutting; Perforating
- B21D28/24—Perforating, i.e. punching holes
- B21D28/26—Perforating, i.e. punching holes in sheets or flat parts
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B15/00—Preventing escape of dirt or fumes from the area where they are produced; Collecting or removing dirt or fumes from that area
- B08B15/04—Preventing escape of dirt or fumes from the area where they are produced; Collecting or removing dirt or fumes from that area from a small area, e.g. a tool
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
- B21C51/00—Measuring, gauging, indicating, counting, or marking devices specially adapted for use in the production or manipulation of material in accordance with subclasses B21B - B21F
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D19/00—Flanging or other edge treatment, e.g. of tubes
- B21D19/005—Edge deburring or smoothing
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/10—Greenhouse gas [GHG] capture, material saving, heat recovery or other energy efficient measures, e.g. motor control, characterised by manufacturing processes, e.g. for rolling metal or metal working
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Punching Or Piercing (AREA)
Abstract
The invention discloses a metal plate cutting device and a cutting early warning method thereof, and relates to the technical field of metal plate processing equipment. The invention can automatically detect the punched hole, automatically judge the quality of the punched hole, automatically polish the inner wall of the hole and the hole opening during punching so as to automatically clean burrs, automatically collect the waste materials from punching the metal plate and buffer the larger metal plate waste materials, and has good use effect.
Description
Technical Field
The invention relates to the technical field of metal plate processing equipment, in particular to a metal plate cutting device and a cutting early warning method thereof.
Background
The metal plate is generally referred to as an iron plate, a copper plate, or the like, and when the metal plate is processed, punching processing is often required, and a punching device is a machine for punching a hole in a workpiece.
However, when the existing metal plate is punched by using the punching device, the function is simpler, firstly, the punched hole cannot be automatically detected, and the situation that the punched hole possibly has errors because the worker is required to measure and detect or even not detect the hole; secondly, when punching, the inner wall of the hole and the hole opening cannot be automatically polished, so that burrs exist in the punched hole, and workers are required to polish afterwards, and the labor capacity is increased; finally, the waste materials which are inconvenient to punch and fall from the metal plate are automatically collected, and the larger metal plate waste materials directly fall on the ground, so that the damage to the ground decoration such as the floor is easy to cause.
Therefore, the application provides a metal plate cutting device and a cutting early warning method thereof to solve the technical problems.
Disclosure of Invention
The application aims to provide a metal plate cutting device and a cutting early warning method thereof, which can automatically detect holes after punching, automatically judge the error of the punched holes, automatically polish the inner walls and the orifice of the holes during punching to automatically clean burrs, automatically collect waste materials from punching and falling of metal plates, buffer larger metal plate waste materials and have good use effect.
In order to achieve the above purpose, the present application provides the following technical solutions: the metal plate cutting device comprises a machine case, wherein a vertical fixing frame is fixed on the machine case, a punching cylinder is fixed at the top of the fixing frame, a fixing plate is fixed at the lower end of a machine shaft of the punching cylinder, a fixing cylinder is installed on the lower end face of the fixing plate, a punching column is rotatably installed at the lower end of the fixing cylinder, and a motor for driving the punching column to rotate is fixed in the fixing cylinder;
a vertical movable shaft is slidably arranged in the stamping column, the lower end of the movable shaft extends out of the lower end of the stamping column, the top end of the movable shaft is positioned in the stamping column and is symmetrically hinged with two connecting rods, two the connecting rod is kept away from the one end at loose axle top articulates installs the horizontal slip stretches out the piece of polishing of punching press post side, just the punching press post internal top is fixed with first spring, first spring butt the top of loose axle.
As a further preferable scheme, the lower end of the fixed cylinder is provided with an opening, a supporting plate is installed in a threaded mode, supporting arms are symmetrically fixed on two sides of the upper end face of the supporting plate, and the top ends of the supporting arms are abutted to the inner top wall of the fixed cylinder.
As a further preferable scheme, the top end of the stamping column is fixed with a bearing plate, the middle part of the upper end face of the bearing plate is fixed with a butt joint column, and the top end of the butt joint column vertically penetrates out of the middle part of the upper end face of the supporting plate.
As a further preferable scheme, the top thread sleeve of the butt joint column is provided with a fixing ring, and the fixing ring is positioned on the upper end face of the supporting plate and matched with the bearing plate to jointly fix the stamping column on the supporting plate.
As a further preferable scheme, a motor is arranged in the fixed cylinder, a shaft of the motor is in plug-in fit with the top end of the butt joint column, and the motor is arranged on the upper end face of the supporting plate.
As a further preferable scheme, a through hole is formed in the upper end face of the workbench, corresponding to the stamping column, a processing ring is fixed in the through hole, the processing ring is communicated with the inside of the case, and a plurality of fastening bolts for fixing the case are arranged at the edge of the processing ring.
As a further preferable scheme, a cavity communicated with the lower end of the processing ring is arranged in the case, and a slidable storage drawer is arranged in the cavity.
As a further preferable scheme, a plurality of elastic pieces are fixed in the storage drawer, and buffer plates are elastically installed at the tops of the elastic pieces.
As a further preferable scheme, a control box is arranged on the fixing frame, a PLC controller is arranged in the control box, and a buzzer and a warning lamp are arranged on the surface of the control box.
In a second aspect, the present application provides a cutting pre-warning method for a metal sheet cutting device, wherein two image capturing units are symmetrically arranged above a workbench, and lenses of the image capturing units are aligned to a processing ring, the method includes:
Step S1, an operator selects a punching column with a corresponding size and a prefabricated fixing sleeve according to the size parameters and punching requirements of a plate to be processed, wherein the prefabricated fixing sleeve is detachably arranged on a workbench through bolts and is manually used for sequentially punching the plate to be processed, and each time the punching column reaches an upper limit, two shooting units are triggered to shoot and sample the punched hole site of the plate, so that a group of detection patterns corresponding to each punching are obtained;
Step S2, sequentially analyzing punching quality evaluation values corresponding to each group of detection patterns, calculating the average value and the mean square error of a plurality of punching quality evaluation values in a single batch, stopping punching operation and warning an operator through a buzzer if the average value is smaller than a first quality threshold value so as to enable the operator to detect whether the model of a processing ring is matched with the model of a punching column or not, wherein the situation generally causes that the punching quality is generally lower due to the fact that the model of the processing ring is not matched with the model of the punching column;
the average value is larger than or equal to a first quality threshold value, and the mean square error is larger than a preset fluctuation threshold value, a first early warning instruction is sent to a remote quality control total station so that the quality control total station sends an expert to debug the punching device again, the average value is larger than or equal to the first quality threshold value, the punching quality fluctuation is larger, the cause is more, the possible causes are unstable pressure supply of a punching cylinder, and the like, and at the moment, professional personnel are required to check on site one by one;
Wherein the analyzing the punching quality evaluation value corresponding to each group of detection patterns comprises:
S21, retrieving a group of detection patterns, wherein the detection patterns comprise a left radius check sub-graph and a right radius check sub-graph;
s22, respectively extracting semicircular hole site partial graphs on one side, close to a corresponding photographing unit, of a left radius inspection sub-graph and a right radius inspection sub-graph based on a preset arc image feature extraction algorithm, so as to obtain a left semicircular partial graph and a right semicircular partial graph;
S23, carrying out shooting angle correction on the left semicircular partial graph and the right semicircular partial graph through a hough algorithm, and further obtaining a corrected left semicircular partial graph and a corrected right semicircular partial graph;
step S24, detecting whether linear cracks exist in a corrected left semicircular partial graph based on a color image feature extraction algorithm, and counting the number of first linear cracks under the condition that the linear cracks exist, wherein the left semicircular partial graph is a circular arc pattern and is used for reflecting the forming condition of the left edge of a punched hole;
S25, cutting out the area marked as the linear crack in the left semicircular partial graph, carrying out gray scale processing on the left semicircular partial graph, and evaluating a first deformation value of the left edge of the punched hole based on gray scale color difference of the gray scale image;
And S26, calculating the second deformation value and the number of the second linear cracks corresponding to the right semicircle partial graph in a similar way, and calculating the punching quality evaluation value corresponding to the detection pattern through a weighting algorithm based on the first deformation value, the second deformation value, the number of the first linear cracks and the number of the second linear cracks.
In summary, the invention has the technical effects and advantages that:
1. The invention benefits from the cooperation of the fixed cylinder, the punching column, the motor, the movable shaft and the grinding block, and the grinding block can grind the punched inner wall and burrs of the orifice by driving the grinding block to stretch out from the punching column and elastically abut against the punched inner wall after the lower end of the movable shaft in the punching column is out of abutment after the punching of the punching column is completed, and the grinding block is driven by the motor to rotate, so that the grinding block is convenient to use.
2. The invention benefits from the cooperation of the processing ring and the storage drawer, the processing ring can be utilized to pour the metal waste materials during processing into the storage drawer, and the buffer plate which is elastically installed in the storage drawer is used for receiving the waste materials, so that the buffer is realized, and the use effect is good.
Drawings
In order to more clearly illustrate the embodiments of the application or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the application, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic diagram of the structure of the present invention;
FIG. 2 is a schematic view of the internal structure of the fixing barrel of the present invention;
FIG. 3 is a schematic view showing the internal structure of the fixing barrel of the present invention;
FIG. 4 is a schematic view showing the internal structure of the punching column of the present invention;
FIG. 5 is an enlarged schematic view of the structure of FIG. 4A in accordance with the present invention;
FIG. 6 is a schematic view of a processing ring according to the present invention;
fig. 7 is a schematic structural view of the accommodating drawer of the present invention.
In the figure: 1. a chassis; 2. a work table; 3. a fixing frame; 4. a punching cylinder; 5. a fixing plate; 6. a fixed cylinder; 7. stamping a column; 701. a receiving plate; 702. butt-joint columns; 703. a fixing ring; 8. a support plate; 801. a support arm; 9. a motor; 10. a movable shaft; 1001. a connecting rod; 11. polishing the block; 1101. polishing the layer; 12. a first spring; 13. a processing ring; 1301. a fastening bolt; 14. a storage drawer; 15. an elastic member; 1501. a base; 1502. a support column; 1503. a second spring; 16. a buffer plate; 18. a control box; 1801. a buzzer; 1802. a warning light.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Example 1: referring to fig. 1,2 and 3, a sheet metal cutting device is shown, which comprises a case 1, a vertical fixing frame 3 is fixed on the case 1, a punching cylinder 4 is fixed at the top of the fixing frame 3, a fixing plate 5 is fixed at the lower end of a shaft of the punching cylinder 4, a fixing cylinder 6 is mounted on the lower end face of the fixing plate 5, a punching column 7 is mounted at the lower end of the fixing cylinder 6 in a rotating manner, and a motor 9 for driving the punching column 7 to rotate is fixed in the fixing cylinder 6.
The lower extreme of fixed section of thick bamboo 6 is equipped with the opening to screw thread installs backup pad 8, the up end bilateral symmetry of backup pad 8 is fixed with support arm 801, the top butt of support arm 801 the roof in the fixed section of thick bamboo 6 for backup pad 8 can stably install in fixed section of thick bamboo 6, and is equipped with sufficient punching press support.
The top end of the stamping column 7 is fixed with a receiving plate 701, a butt joint column 702 is fixed in the middle of the upper end surface of the receiving plate 701, the top end of the butt joint column 702 vertically penetrates out of the middle of the upper end surface of the supporting plate 8, a fixing ring 703 is sleeved on the top end thread of the butt joint column 702, and the fixing ring 703 is located on the upper end surface of the supporting plate 8, so that the fixing ring 703 can be matched with the receiving plate 701 to fix the stamping column 7 on the supporting plate 8, i.e. the stamping column 7 movably rotates at the bottom of the fixing cylinder 6.
Meanwhile, a motor 9 is installed in the fixed cylinder 6, a shaft of the motor 9 is in plug-in fit with the top end of the docking post 702, and the motor 9 is disposed on the upper end surface of the supporting plate 8, so that the motor 9 can drive the punching post 7 to rotate at the lower end of the fixed cylinder 6, and accordingly burrs on the inner wall of the hole and the ports thereof can be polished in cooperation with related structures (specific structures are shown below) in the punching post 7.
Referring to fig. 3,4 and 5, the punching column 7 is provided therein with a related structure for deburring, specifically: the vertical movable shaft 10 is slidably mounted in the punching column 7, the lower end of the movable shaft 10 extends out of the lower end of the punching column 7, the top end of the movable shaft 10 is located in the punching column 7 and is symmetrically hinged with two connecting rods 1001, one end, away from the top end of the movable shaft 10, of each connecting rod 1001 is hinged with a grinding block 11 horizontally sliding and extending out of the side face of the punching column 7, a first spring 12 is fixed at the inner top of the punching column 7, the first spring 12 abuts against the top of the movable shaft 10, in the punching process, the punching column 7 rapidly moves downwards, when the bottom of the movable shaft 10 contacts a metal plate, the movable shaft 10 moves upwards to enable the grinding blocks 11 to be rapidly and internally converged, and then the movable shaft is aligned with the outer surface of the punching column 7, and due to the fact that the speed of the punching column 7 is high, the rebound speed of the grinding blocks 11 can be adjusted by adjusting the spring pressure of the first spring 12 or by adjusting the supporting angle of the connecting rods 1001, and the like, and the metal plate is prevented from protruding out of the outer surface of the punching column 7 when the metal plate does not reach the grinding block 11.
Therefore, when the punching column 7 is punched, the movable shaft 10 extending from the lower end of the punching column 7 is extruded by the upper surface of the metal plate, so that the top end of the movable shaft 10 drives the grinding block 11 to retract into the side wall of the punching column 7 through the connecting rod 1001, so that the punching column 7 can punch a hole with a diameter corresponding to the punching column 7 on the metal plate.
After punching out the hole, the lower end of the punching column 7 loses the metal plate abutting joint, the movable shaft 10 moves downwards under the action of the first spring 12, at this time, the movable shaft 10 stretches out the grinding block 11 from the inner side surface of the punching column 7 through the connecting rod 1001 again, most of the punching column 7 at this time is still in the drilled hole, the grinding layer 1101 correspondingly constructed on the outer side of the grinding block 11 abuts against the hole wall, and the fixed cylinder 6 is lifted along with the punching cylinder 4, so that the grinding block 11 grinds the hole wall and burrs at the hole opening through the grinding layer 1101.
Referring to fig. 1, 5, 6 and 7, a through hole is formed in the upper end surface of the table 2 at a position corresponding to the press column 7, a processing ring 13 is fixed in the through hole, the processing ring 13 is communicated with the interior of the casing 1, and a plurality of fastening bolts 1301 for fixing the casing 1 are provided at the edge of the processing ring 13.
And a cavity communicated with the lower end of the processing ring 13 is arranged in the case 1, and a drawer 14 is slidingly accommodated. Wherein, a plurality of elastic pieces 15 are fixed in the storage drawer 14, a buffer plate 16 is mounted at the top of the elastic pieces 15, and the buffer plate 16 is located at the middle part in the polishing block 11. In particular, the elastic member 15 includes a base 1501, a support column 1502 and a second spring 1503, the base 1501 is fixed on the inner bottom surface of the storage drawer 14, the support column 1502 is movably inserted into the top of the base 1501, and the second spring 1503 is sleeved on the support column 1502 and elastically abuts the support column 1502 upwards.
Referring to fig. 1, a PLC controller is installed in the control box 18, and a buzzer 1801 and a warning lamp 1802 are installed on the surface of the control box 18.
Example 2: the embodiment is based on embodiment 1, and is used for providing a cutting pre-warning method of a metal sheet cutting device, wherein two image capturing units are symmetrically arranged above a workbench 2, lenses of the image capturing units are aligned to a processing ring 13, and the method comprises the following steps:
Step S1, an operator selects a punching column 7 with a corresponding size and a prefabricated fixing sleeve, namely a clamp sleeve according to the size parameters and punching requirements of a plate to be processed, wherein a processing ring 13 is one part of the prefabricated fixing sleeve, and other parts are not shown in the figure;
Step S2, sequentially analyzing punching quality evaluation values corresponding to each group of detection patterns, calculating the mean value and the mean square error of a plurality of punching quality evaluation values in a single batch, stopping punching operation and warning an operator through a buzzer 1801 if the mean value is smaller than a first quality threshold value, so that the operator detects whether the model of the machining ring 13 is matched with the model of the punching column 7, and the situation generally causes that the punching quality is generally lower due to the fact that the model of the machining ring 13 is not matched with the model of the punching column 7;
The average value is greater than or equal to a first quality threshold value, and the mean square error is greater than a preset fluctuation threshold value, a first early warning instruction is sent to a remote quality control total station so that the quality control total station sends an expert to debug the punching device again, the average value is greater than or equal to the first quality threshold value, the fact that the fluctuation of punching quality is greater is caused, the cause is probably that the pressure supply of the punching cylinder 4 is unstable, and the like, and at the moment, professional personnel are required to check on site one by one;
Wherein the analyzing the punching quality evaluation value corresponding to each group of detection patterns comprises:
S21, retrieving a group of detection patterns, wherein the detection patterns comprise a left radius check sub-graph and a right radius check sub-graph;
s22, respectively extracting semicircular hole site partial graphs on one side, close to a corresponding photographing unit, of a left radius inspection sub-graph and a right radius inspection sub-graph based on a preset arc image feature extraction algorithm, so as to obtain a left semicircular partial graph and a right semicircular partial graph;
S23, carrying out shooting angle correction on the left semicircular partial graph and the right semicircular partial graph through a hough algorithm, and further obtaining a corrected left semicircular partial graph and a corrected right semicircular partial graph;
step S24, detecting whether linear cracks exist in a corrected left semicircular partial graph based on a color image feature extraction algorithm, and counting the number of first linear cracks under the condition that the linear cracks exist, wherein the left semicircular partial graph is a circular arc pattern and is used for reflecting the forming condition of the left edge of a punched hole;
S25, cutting out the area marked as the linear crack in the left semicircular partial graph, carrying out gray scale processing on the left semicircular partial graph, and evaluating a first deformation value of the left edge of the punched hole based on gray scale color difference of the gray scale image;
And S26, calculating the second deformation value and the number of the second linear cracks corresponding to the right semicircle partial graph in a similar way, and calculating the punching quality evaluation value corresponding to the detection pattern through a weighting algorithm based on the first deformation value, the second deformation value, the number of the first linear cracks and the number of the second linear cracks.
Finally, it should be noted that: the foregoing description is only illustrative of the preferred embodiments of the present invention, and although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments described, or equivalents may be substituted for elements thereof, and any modifications, equivalents, improvements or changes may be made without departing from the spirit and principles of the present invention.
Claims (9)
1. The utility model provides a cutting early warning method of sheet metal cutting device, the device includes quick-witted case (1), be fixed with vertical mount (3) on machine case (1), the top of mount (3) is fixed with punching press cylinder (4), the arbor lower extreme of punching press cylinder (4) is fixed with fixed plate (5), fixed cylinder (6) are installed to the lower terminal surface of fixed plate (5), the lower extreme rotation of fixed cylinder (6) is installed and is stamped post (7), be fixed with in fixed cylinder (6) and be used for driving punching press post (7) to rotate motor (9), the lower extreme of movable shaft (10) stretches out outside the lower extreme of punching press post (7), just the top of movable shaft (10) is located punching press post (7) to the symmetry articulates there are two connecting rod (1001), two one end articulates of connecting rod (1001) are kept away from the top of movable shaft (10) is installed and is horizontally slid out and is stamped post (7), and is equipped with a position (12) in the movable post (7) is stamped post (12) in the top of a pair of movable post (7), the top of the movable post (12), a processing ring (13) is fixed in the through hole, two photographing units are symmetrically arranged above the workbench (2), lenses of the photographing units are aligned to the processing ring (13), and the method comprises the following steps:
Step S1, an operator selects a punching column (7) with a corresponding size and a prefabricated fixing sleeve according to the size parameter and punching requirement of a plate to be processed, wherein the prefabricated fixing sleeve is detachably arranged on a workbench (2) through bolts and is manually and sequentially subjected to punching operation of the plate to be processed, and each time the punching column (7) reaches an upper limit during the punching operation, two camera units are triggered to shoot and sample the punched plate hole sites, so that a group of detection patterns corresponding to each punching are obtained;
S2, sequentially analyzing punching quality evaluation values corresponding to each group of detection patterns, calculating the average value and the mean square error of a plurality of punching quality evaluation values in a single batch, stopping punching operation and warning an operator through a buzzer (1801) if the average value is smaller than a first quality threshold value, so that the operator detects whether the model of a processing ring (13) is matched with the model of a punching column (7);
The average value is larger than or equal to a first quality threshold value, and the mean square error is larger than a preset fluctuation threshold value, a first early warning instruction is sent to a remote quality control total station so that the quality control total station sends an expert to debug the punching device again;
Wherein the analyzing the punching quality evaluation value corresponding to each group of detection patterns comprises:
S21, retrieving a group of detection patterns, wherein the detection patterns comprise a left radius check sub-graph and a right radius check sub-graph;
s22, respectively extracting semicircular hole site partial graphs on one side, close to a corresponding photographing unit, of a left radius inspection sub-graph and a right radius inspection sub-graph based on a preset arc image feature extraction algorithm, so as to obtain a left semicircular partial graph and a right semicircular partial graph;
S23, carrying out shooting angle correction on the left semicircular partial graph and the right semicircular partial graph through a hough algorithm, and further obtaining a corrected left semicircular partial graph and a corrected right semicircular partial graph;
step S24, detecting whether linear cracks exist in a corrected left semicircular partial graph based on a color image feature extraction algorithm, and counting the number of first linear cracks under the condition that the linear cracks exist, wherein the left semicircular partial graph is a circular arc pattern and is used for reflecting the forming condition of the left edge of a punched hole;
S25, cutting out the area marked as the linear crack in the left semicircular partial graph, carrying out gray scale processing on the left semicircular partial graph, and evaluating a first deformation value of the left edge of the punched hole based on gray scale color difference of the gray scale image;
And S26, calculating the second deformation value and the number of the second linear cracks corresponding to the right semicircle partial graph in a similar way, and calculating the punching quality evaluation value corresponding to the detection pattern through a weighting algorithm based on the first deformation value, the second deformation value, the number of the first linear cracks and the number of the second linear cracks.
2. The method of claim 1, wherein the step of providing the cut warning comprises: the lower extreme of fixed section of thick bamboo (6) is equipped with the opening to screw thread installs backup pad (8), the up end bilateral symmetry of backup pad (8) is fixed with support arm (801), the top butt of support arm (801) roof in fixed section of thick bamboo (6).
3. The cutting warning method according to claim 2, characterized in that: the top of punching press post (7) is fixed with and accepts board (701), it is fixed with butt joint post (702) to accept the up end middle part of board (701), the top of butt joint post (702) is vertical to be worn out the up end middle part of backup pad (8).
4. The method of claim 3, wherein the step of providing a cut warning comprises: the top thread bush of butt joint post (702) is equipped with solid fixed ring (703), gu fixed ring (703) are located the up end of backup pad (8), and with accept board (701) cooperation is together will punching press post (7) are fixed in on backup pad (8).
5. The method of claim 4, wherein the step of providing the cut warning comprises: the motor (9) is installed in the fixed cylinder (6), the shaft of the motor (9) is in plug-in fit with the top end of the butt joint column (702), and the motor (9) is arranged on the upper end face of the supporting plate (8).
6. The method of claim 1, wherein the step of providing the cut warning comprises: the processing ring (13) is communicated with the inside of the case (1), and a plurality of fastening bolts (1301) for fixing the case (1) are arranged at the edge of the processing ring (13).
7. The method of claim 6, wherein the step of providing the cut warning comprises: the machine case (1) is internally provided with a cavity communicated with the lower end of the processing ring (13), and the cavity is internally provided with a slidable storage drawer (14).
8. The method of claim 7, wherein the step of providing the cut warning comprises: a plurality of elastic pieces (15) are fixed in the storage drawer (14), and buffer plates (16) are elastically installed at the tops of the elastic pieces (15) together.
9. The method of claim 1, wherein the step of providing the cut warning comprises: the fixed frame (3) is provided with a control box (18), a PLC controller is arranged in the control box (18), and a buzzer (1801) and a warning lamp (1802) are arranged on the surface of the control box (18).
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