A fixed area based material sheet cutting device and a cutting method thereof

Abstract

This invention provides a plate cutting device and method based on a fixed area, relating to the field of plate cutting equipment. It includes: a machine tool assembly comprising a working surface for supporting the plate; a moving assembly located above the working surface, with a laser cutting blade mounted on its moving end to drive the laser cutting blade to move along the length and width directions of the working surface; a measuring assembly including at least two sets of position measuring modules installed on both sides of the working surface along its length direction, the position measuring modules being configured to move along the length direction of the working surface and emit measuring beams toward the side of the plate to obtain edge position data of the plate; and a camera assembly for capturing images of the entire working surface. By acquiring the actual edge position data of the plate through the measuring modules and combining it with the camera assembly, the usable cutting area of ​​the plate can be defined more accurately, reducing the impact of plate placement deviations or size fluctuations.

Description

Technical Field

[0001] This invention relates to the field of sheet metal cutting equipment, and more specifically, to a sheet metal cutting device and method based on a fixed area. Background Technology

[0002] In the laser cutting process of sheet metal, the dimensions of the sheet metal often fluctuate due to different production batches, and local defects such as missing corners and bulges may appear on the edges or surface of the sheet metal. In traditional cutting processes, cutting layout is usually based on preset fixed programs or a single vision system.

[0003] However, existing technologies have the following shortcomings: First, for material plates with fluctuating dimensions, traditional equipment has difficulty quickly and reliably defining the actual effective cutting area, resulting in poor layout adaptability and requiring repeated manual teaching and adjustments, which affects processing efficiency.

[0004] Secondly, when there are missing corners or bulges on the surface of the material plate, although the camera vision system can identify the approximate location of the defect, it is difficult to quantitatively measure the boundary contour and depth of the defect, and it is impossible to generate a suitable avoidance area. As a result, the cutting path may coincide with the defect area, leading to the scrapping of the workpiece, or forcing the operator to avoid the defect by cutting off the entire edge of the material, resulting in material waste.

[0005] Third, after the main workpiece layout is completed, there is a lack of effective means to reuse the remaining irregular blank areas, making it difficult to automatically match and cut small-sized workpieces, resulting in low overall utilization of the material plate. Summary of the Invention

[0006] To address the shortcomings of existing technologies, the present invention aims to provide a material plate cutting device and method based on a fixed area, so as to improve the problems of inaccurate cutting area definition and insufficient material utilization caused by material plate size fluctuations and local defects.

[0007] To achieve the above objectives, the present invention provides the following technical solution: This invention provides a material plate cutting device based on a fixed area, comprising: a machine tool assembly including a working surface for supporting the material plate; a moving assembly located above the working surface, with a laser cutting blade on its moving end to drive the laser cutting blade to move along the length and width directions of the working surface; a measuring assembly including at least two sets of position measuring modules installed on both sides of the working surface along its length direction, the position measuring modules being configured to move along the length direction of the working surface and emit measuring beams toward the side of the material plate to obtain edge position data of the material plate; a camera assembly for capturing images of the entire working surface; and a control unit electrically connected to the moving assembly, the measuring assembly, and the camera assembly respectively; the control unit is configured to: obtain the available cutting area of ​​the material plate using the position measuring modules; array a target contour within the available cutting area, calculate the maximum number of cuts and the area of ​​the blank area; and when the camera assembly identifies a defective area on the material plate, control at least one set of position measuring modules in the measuring assembly to scan and measure the defective area, obtain defect boundary size data, generate a rectangular defect avoidance box based on the defect boundary size, and remove the rectangular avoidance box within the available cutting area to update the available cutting area.

[0008] According to one embodiment of the present invention, the number of position measurement modules is four, which are respectively referred to as the first measurement module, the second measurement module, the third measurement module and the fourth measurement module. When the four sets of position measurement modules are working, they correspond to the four corner areas of the material plate to define the boundary contour of the material plate.

[0009] According to one embodiment of the present invention, the measuring assembly further includes a lead screw module, a nut block, and a movable seat; the lead screw module extends along the length direction of the working surface and is mounted on the bed of the machine tool assembly; the nut block is sleeved on the lead screw of the lead screw module; the movable seat is fixedly connected to the nut block, the position measuring module is mounted on the movable seat, and the lead screw module drives the nut block and the movable seat to move back and forth synchronously along the length direction of the working surface.

[0010] According to one embodiment of the present invention, the measuring component further includes a protective shell, which is fixed to the upper side surface of the bed. A slide rail is provided inside the protective shell, and the movable seat is slidably disposed on the slide rail. An opening is provided on the side of the protective shell facing the working surface, and a glass cover is installed at the opening. The measuring beam emitted by the position measuring module passes through the glass cover and illuminates the side wall of the material plate.

[0011] According to one embodiment of the present invention, the machine tool assembly further includes a backing plate and a telescopic cylinder. The backing plate is disposed at one end of the working surface along the length direction, and the telescopic cylinder is drivenly connected to the backing plate to drive the backing plate to rise and fall, so as to stop and position the material plate entering the working surface.

[0012] According to one embodiment of the present invention, the measuring component further integrates a laser beam beam projected onto the upper surface of the material plate to cooperate with the camera component in identifying bulge defects on the surface of the material plate.

[0013] This invention also provides a cutting method for a material plate cutting device based on a fixed area, comprising the following steps: S1, determining the first reference edge and width of the material plate using a reference side position measurement module; S2, driving the opposite side position measurement module to move along the length direction of the bed to determine the second reference edge and length, defining the initial available cutting area; S3, detecting defects through a camera component, and if defects exist, driving the adjacent position measurement module to scan to generate a defect avoidance area and updating the available cutting area; S4, arranging the target contour array within the available cutting area, determining the maximum number of cuts, and recording the remaining area as a blank area; S5, selecting the target contour of target B based on the size of the blank area for secondary arrangement, and if there is still a margin, continuing to iterate and fill smaller contours until they cannot be accommodated or the preset number of cuts is reached; S6, executing the cutting according to the arrangement path, and recording the cutting parameters for this cutting to form empirical data for subsequent use on material plates of the same size.

[0014] According to one embodiment of the present invention, the processing of the corner defect in step S3 includes: retrieving the position measurement module closest to the corner as the detection module; driving the detection module to move along the length direction of the bed to obtain two extreme positions of the corner along the length direction; driving the detection module to move along the length direction of the bed to obtain the maximum depth of the corner; and generating a rectangular defect avoidance area based on the two extreme positions and the maximum depth.

[0015] According to one embodiment of the present invention, the processing of the bulge defect in step S3 includes: driving the movable seat equipped with a laser wire punch to the area corresponding to the bulge; driving the movable seat to move along the first direction of the bed and projecting a line laser extending along the second direction, and recording two intersection points of the line laser twist; driving the movable seat to move along the second direction of the bed and projecting a line laser extending along the first direction, and recording two intersection points of the line laser twist; and generating a rectangular defect avoidance area based on the four intersection points.

[0016] According to one embodiment of the present invention, the method further includes: the system records the size of the cutting plate, the layout path and the outline combination to form historical experience data; when a cutting plate whose size matches the historical experience data is subsequently detected, the corresponding historical cutting path is directly called to perform the cutting operation.

[0017] In summary, this application includes at least one of the following beneficial technical effects: 1. In this invention, by setting up multiple sets of independently movable position measurement modules, the actual edge position data of the material board is obtained. Combined with the camera component, the usable cutting area of ​​the material board can be defined more accurately, reducing the impact of material board placement deviation or size fluctuation, and providing a reliable basis for subsequent layout and cutting.

[0018] 2. In this invention, through the collaborative work of the camera component and the position measurement module, local defects such as missing corners and bulges on the surface of the material plate can be identified, and corresponding rectangular defect avoidance areas can be generated. Compared with the processing method of cutting off the entire edge material, more usable cutting area can be retained, which is beneficial to reducing material waste and improving workpiece yield.

[0019] 3. In this invention, by performing secondary layout and iterative filling of the blank areas, the main workpiece cutting can be completed while the scrap material on the edge of the material plate is fully utilized for the processing of auxiliary workpieces, which helps to improve the overall utilization rate of the material plate and the processing economy.

[0020] 4. In this invention, by recording historical cutting parameters to form empirical data, existing cutting paths can be directly called when encountering material plates of the same specifications, reducing the time spent on repeated calculations and adjustments, and improving the production efficiency of batch processing. Attached Figure Description

[0021] Figure 1 This is a main structural diagram of Embodiment 1 of the present invention; Figure 2 This is another structural diagram of Embodiment 1 of the present invention; Figure 3 for Figure 2 Partial structural diagram of a machine tool component; Figure 4 This is a top view of the structure of Embodiment 1 of the present invention; Figure 5 This is a partial disassembled structural diagram of the measuring component of the present invention; Figure 6 This is a partial structural diagram of the measuring component of the present invention; Figure 7 for Figure 6 Enlarged structural diagram at point A in the middle; Figure 8 for Figure 4 Local structural diagram; Figure 9 This is a schematic diagram illustrating the measurement principle of the blank area in Embodiment 2 of the present invention; Figure 10 This is a schematic diagram illustrating the measurement principle when there are corner defects on the surface of the material plate in Embodiment 2 of the present invention; Figure 11 This is a schematic diagram of the various locations during the measurement of the missing corner defect in Embodiment 2 of the present invention; Figure 12 This is a schematic diagram illustrating the measurement principle when a bulge defect exists on the surface of the material plate in Embodiment 3 of the present invention. Figure 13 This is a schematic diagram illustrating the measurement principle when another type of bulging defect exists on the surface of the material plate in Embodiment 3 of the present invention; Figure 14 This is a schematic diagram illustrating the process of measuring bulge defects in Embodiment 3 of the present invention.

[0022] Figure label: 100. Machine tool assembly; 101. Bed; 102. Backrest; 103. Telescopic cylinder; 200. Moving assembly; 300. Measuring assembly; 301. Lead screw module; 302. Nut block; 303. Moving seat; 304. Position measuring module; 304a. First measuring module; 304b. Second measuring module; 304c. Third measuring module; 304d. Fourth measuring module; 305. Position sensor; 306. Protective housing; 3061. Clearance groove; 3062. Opening; 307. Glass cover; 400. Camera assembly; 500. Material plate. Detailed Implementation

[0023] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0024] Example 1 discloses a material plate cutting device based on a fixed area, including a machine tool assembly 100, a moving assembly 200, a measuring assembly 300, and a camera assembly 400. The machine tool assembly 100 is the main body of a laser cutting machine tool, on which a material plate 500 is placed. The moving assembly 200 is mounted above the machine bed 101, and a laser cutting blade is mounted on the moving end of the moving assembly 200. The moving assembly 200 can drive the laser cutting blade to move along the length and width directions of the machine bed 101, thereby traveling on the working surface of the machine bed 101. The measuring assembly 300 is installed on both sides of the machine tool assembly 100 along its length direction, and measures the edge position of the material plate 500 through various position measuring modules 304 within the measuring assembly 300.

[0025] See Figures 2 to 4 The upper part of the bed 101 is set as the working surface. The camera component 400 is installed above the working surface and can capture the entire working surface. A backrest 102 is set at one end of the working surface along the length of the bed 101. A telescopic cylinder 103 is installed on the bed 101. One end of the telescopic cylinder 103 is connected to the backrest 102. The telescopic cylinder 103 drives the backrest 102 to move up and down.

[0026] See Figure 4 and Figure 8 The material plate enters from the left side of the working surface and stops at the right-side support plate 102. Two sets of measuring components 300 are set on both sides of the working surface. The measuring components 300 are equipped with position measuring modules 304, namely the first measuring module 304a, the second measuring module 304b, the third measuring module 304c, and the fourth measuring module 304d. The first measuring module 304a, the second measuring module 304b, the third measuring module 304c, and the fourth measuring module 304d are respectively positioned at the four corners of the material plate 500. Based on the positions of the first measuring module 304a, the second measuring module 304b, the third measuring module 304c, and the fourth measuring module 304d, the size of the material plate on the working surface is calculated, forming a cutting area that can be cut, which facilitates the planning of the contour size for laser cutting.

[0027] See Figure 5 , Figure 6 and Figure 7 Each measuring assembly 300 includes a lead screw module 301, a nut block 302, a movable seat 303, and a protective shell 306. The protective shell 306 is installed on the upper end face of one side of the bed 101. A clearance groove 3061 is opened at the bottom of the protective shell 306. An opening 3062 is opened on the side of the protective shell 306 facing the working surface. A glass cover 307 is installed on the opening 3062. The bottom of the movable seat 303 is set inside the protective shell 306 through a slider and a slide rail. The movable seat 303 can slide and move above the clearance groove 3061. Furthermore, the bed 101 has a cavity for accommodating the lead screw module 301. A nut block 302 is connected to the screw of the lead screw module 301. Through slots are formed on both end faces of the bed 101. One end of the nut block 302 extends out of the through slot and enters through the clearance slot 3061 of the protective shell 306 to be fixedly connected to the movable seat 303 installed inside the protective shell 306. The position measurement module 304 is installed on the upper end face of the movable seat 303. At the same time, a position sensor 305 is also provided inside the protective shell 306. The position sensor 305 is located at one end of the clearance slot 3061 and is used to detect the change in displacement of the movable seat 303 along its respective clearance slot 3061.

[0028] See Figure 8 The position measurement module 304 uses a laser displacement sensor. The laser can pass through the glass cover 307 and hit one side of the material plate 500 in the thickness direction. The screw of the lead screw module 301 drives the nut block 302 to move the moving seat 303 and the position measurement module 304 along the length direction of the material plate 500. After the position measurement module 304 is moved, the position sensor 305 can obtain the material plate 500 of different lengths, so as to establish the coordinate system of the cutting surface according to the actual size of the material plate 500.

[0029] The cutting device in this embodiment performs the following cutting method: S1, when one end of the material plate 500 abuts against the backing plate 102, the reference surface of the material plate 500 on this side of the backing plate 102 is located and the width of the material plate 500 is identified by the first measurement module 304a and the second measurement module 304b.

[0030] S2, the fourth measurement module 304d and the third measurement module 304c are moved to identify the reference surface of the material plate 500 on the side away from the backing plate 102, and the length of the current material plate 500 is calculated by combining the first measurement module 304a and the second measurement module 304b.

[0031] S3 generates a usable cutting surface based on the current length and width values ​​of the 500-meter material plate and two reference planes.

[0032] S4, the system presets the required outline size for the current board material cutting, i.e., the size of target A's outline, arrays target A's outline on the cutting surface, and calculates the maximum number of cuts and the area of ​​the blank area. In this embodiment, the blank area is the size of a continuous, uncut cutting surface.

[0033] In S4, the placement of the target profile is set according to the length and width directions of the material plate 500, as follows: S41. Within the available cutting area, lay out the outline of target A and calculate the maximum number of cuts, specifically including: S411. Execute the first layout scheme: Place the length direction of the target A outline parallel to the width direction of the material plate, and perform array layout along the length direction of the material plate. Calculate the first number of target A outlines that can be cut under this scheme and the corresponding first blank area. S412. Execute the second layout scheme: Adjust the posture of the A target outline so that its length direction is parallel to the length direction of the material plate, and perform array layout along the width direction of the material plate. Calculate the second number of A target outlines that can be cut under this scheme and the corresponding second blank area. S42. Compare the first layout scheme with the second layout scheme, select the scheme with more cuts of the target A outline as the final layout scheme, and record the corresponding blank area under the scheme for subsequent steps.

[0034] S5, the system automatically filters available contour sizes based on the size of the blank area and sorts them in order of size to form a group of available contours. Based on the current group of available contours, the system waits for the user to manually select the desired target contour on the control panel for cutting, with a waiting time of 10 to 20 seconds.

[0035] S51, if a selection is made manually, then an array is formed in the blank area according to the selected available contours. The selected target contours are arranged in the blank area according to the cutting method in S4. The maximum number of cuts is calculated, and then step S6 is executed.

[0036] S52, if no selection is made manually after the waiting time has expired, the system will automatically select a suitable target contour size from the available contour groups based on the blank area and cut it, and then proceed to step S53.

[0037] In step S52, the system prioritizes the usage frequency of each contour in the current available contour group and selects the highest priority target contour B to array in the blank area.

[0038] S53, determine whether the white space area has been fully used; The criterion for determining when the white space is exhausted is: the current white space cannot accommodate any of the B target contours in the available contour group.

[0039] S531, if it is determined that the area of ​​the rectangular envelope required for all B target contours is greater than the area of ​​the current blank area, or although the area is satisfied, the shape and size cannot be matched for placement, then proceed to step S6. If it is determined that the space is not fully utilized, meaning there is at least one B target contour that can be placed within the white space area, then the selected B target contours are arrayed and arranged within the white space area. After cutting, the resulting new, smaller white space area is defined as the secondary white space area. Subsequently, a secondary usable contour library is generated based on the currently available contour library. The contours in this library are prioritized according to their usage frequency and compared one by one with the secondary white space area until at least one C target contour can be cut out. Then, step S6 is executed. If none of the contours can be satisfied after comparison, or if the number of compared contours exceeds a preset value (e.g., 10), step S6 is also executed.

[0040] S6, execute the cutting operation, and sequentially cut out the target contour A, target contour B and possible target contour C on the material plate 500, completing one cutting operation of the material plate 500; In step S6, the size of the current material plate 500, the positions of the two reference planes, and the current cutting path are recorded to form the experience library of the current cutting device. If the system calculates that the size of the cutting surface of the next material plate 500 matches any cutting surface size in the experience library, the historical cutting path of that cutting surface in the experience library is executed. This allows for the formation of optimal cutting schemes for material plates 500 of different sizes, and improves the cutting efficiency of material plates 500 with different specifications by setting the experience library.

[0041] In this embodiment, the size of the blank area can be obtained by setting the first measurement module 304a, the second measurement module 304b, the third measurement module 304c and the fourth measurement module 304d. During the arrangement of the outline on the cutting surface, the system will automatically generate a rectangular preset outline based on the outline to be cut, forming a state in which the preset outline frames the outline to be cut. On the one hand, the preset outline can leave a margin for cutting, and on the other hand, since the preset outline is a regular rectangular outline, it is convenient to arrange on the cutting surface.

[0042] One method for determining the size of the blank area in this embodiment is as follows: It needs to be clarified that existing technologies cannot accurately determine the maximum blank area using only the camera component, and the fundamental reasons are as follows: Firstly, in order to capture the entire working surface, the camera assembly needs to use a wide-angle lens or be suspended at a high position, which inevitably introduces perspective distortion and a decrease in edge resolution, resulting in inherent errors in the material board size and edge position calculated from a single frame image. If a moving, segmented shooting and stitching method is used, not only will efficiency be reduced, but the cumulative error of image stitching will also be added. Therefore, it is difficult to establish an accurate coordinate system of the usable area of ​​the material board by relying solely on the camera assembly.

[0043] Secondly, and more importantly, the overall outer boundary formed after the cut contours are laid out is essentially a logical contour generated internally by the system. It has no physical height difference, color variation, or visible markings on the material board surface. For a camera component that can only passively acquire two-dimensional optical images, this logical boundary is actually "invisible." Therefore, although the camera component can "see" the entire material board, it cannot accurately define the boundary of the contour assembly, and naturally cannot accurately calculate the maximum reusable blank area.

[0044] To address the aforementioned problems, this invention employs a collaborative approach between the camera component and the measurement component. Its workflow is as follows: First, the edge of the material plate is scanned by the position measurement modules in the measurement component, and the system establishes an initial usable cutting area that matches the current size of the material plate.

[0045] Subsequently, the system logically generates a minimum rectangular envelope for each contour to be cut, as the first preset contour; and arranges multiple first preset contours in an array within the initial available cutting area to form an overall layout scheme. The system then generates a minimum rectangular boundary surrounding the scheme, as the second preset contour. Removing the second preset contour from the cutting surface yields the blank area.

[0046] At this point, the camera component can perform a preliminary inspection of the layout scheme to determine whether it interferes with macroscopic defects existing on the material board. After confirming that the layout scheme is logically consistent, the system drives the position measurement module adjacent to its boundary to move based on the coordinates inside the second preset contour. For example... Figure 9 The third and fourth measurement modules in the middle, move the third measurement module 304c and the fourth measurement module 304d to Figure 9 The position of the dotted line in the middle was then determined. Figure 9 The position of the middle dashed line.

[0047] Furthermore, the size of the blank area can be calculated by using the specific position of the dotted line on the cutting surface, that is, the length and width of the blank area can be indirectly determined. Calculating the size of the blank area using length and width is a conventional method for calculating area, which will not be elaborated here.

[0048] In Example 2, when a corner is missing on the material plate 500, the camera component 400 alone cannot accurately identify the location or size of the missing corner, which can easily affect subsequent cutting operations. Alternatively, existing technologies directly cut off the entire missing corner, resulting in material waste.

[0049] This embodiment discloses a cutting method based on Embodiment 1, which can identify the area and size of the missing corner, thereby avoiding the missing corner and completing the cutting operation on the material plate 500. See also... Figure 10 The camera assembly 400 captures images of the working surface, detecting the location of the missing corner on the material plate 500. Based on feedback, the system controls the position measurement module 304 closest to the missing corner to move laterally, scanning the entire missing corner and recording the two positions of the missing corner reflected in the position measurement module 304. Then, the laser ranging of the position measurement module 304 determines the maximum depth of the missing corner. Based on these two positions and the maximum depth, a preset frame containing the missing corner can be generated. Further, by determining... Figure 10 By finding the values ​​for the two positions and the maximum depth, the size of the missing corner can be determined.

[0050] See Figure 10 If the missing corner occurs Figure 10 At the lower left corner of the material plate 500, the camera assembly 400 can detect any missing corners on the material plate 500. Upon receiving feedback on the location of the missing corner, the system controls the third measurement module 304c, which is closest to the missing corner, to activate. (See also...) Figure 11At this time, the third measuring module 304c moves laterally towards the missing corner and sweeps across the entire missing corner, obtaining the positions of the third measuring module 304c at the leftmost and rightmost positions of the missing corner, denoted as M1 and M2. Then, the maximum depth K of the missing corner can be determined by the third measuring module 304c, and the position M3 of the third measuring module 304c at this time is recorded. Further, any one of these three points can be selected as the origin to establish a coordinate system, and a rectangle with a length of |M1-M2| and a width of K can be obtained in the coordinate system. It can be seen that the missing corner is contained in the rectangular surface. By cutting off the part of the rectangle on the cutting surface, the contour cutting operation in Embodiment 1 can be continued.

[0051] Based on Embodiment 1, the supplementary steps of this embodiment are as follows: S31, if the camera assembly 400 does not detect a missing corner on the material plate 500, proceed to step S4; if the camera assembly 400 detects a missing corner on the material plate 500, proceed to step S32, the specific steps of S32 are as follows: S321, the system determines the location of the corner defect on the material plate 500 based on the image data collected by the camera component 400, and retrieves the position measurement module 304 closest to the corner defect as the defect detection module. (See also...) Figure 10 If the corner defect occurs at the lower left corner of the material plate 500, the nearest third measurement module 304c will be selected as the defect detection module.

[0052] S322. Drive the moving seat 303 corresponding to the defect detection module through the lead screw module 301, so that the defect detection module moves along the length direction of the bed 101, so that the measuring laser beam emitted by it sweeps across the entire corner defect, and records the two extreme positions of the corner defect along the length direction, which are denoted as M1 and M2 respectively. M1 and M2 are the leftmost and rightmost positions of the corner defect, respectively.

[0053] S323, drive the defect detection module to move along the length of the bed 101, and use laser ranging to identify the maximum depth K of the corner defect, and record the position M3 of the defect detection module at this time.

[0054] S324. Using M1, M2, and M3 as references, select any one of them as the origin to establish a planar coordinate system, and generate a rectangular defect avoidance box with a length of |M1-M2| and a width of K. This rectangular defect avoidance box can encompass the entire corner defect. Remove the unusable area corresponding to the rectangular defect avoidance box within the available cutting surface to complete the update of the available cutting surface.

[0055] The corner-cutting defect processing flow in this embodiment can determine the boundary and size of the corner-cutting defect and generate a defect avoidance frame. Compared with the existing technology of cutting off the edge of the entire material plate, it can retain more usable cutting area, reduce material waste, and avoid the problem of the cutting path overlapping with the defect area, thus ensuring the workpiece cutting yield.

[0056] In Example 3, if a bulge appears on the material plate 500, it will also affect the cutting operation. That is, an unusable cutting surface appears in the non-edge area of ​​the material plate 500. The bulge may appear at any position on the cutting surface. Since the position of the bulge cannot be effectively intervened during the cutting process, the traditional cutting method can only replace the material plate 500. In this example, the measuring component 300 is combined with the camera component 400 to observe the position of the bulge on the cutting surface, which facilitates the subsequent cutting operation of the material plate 500.

[0057] Simply install a wire punch on any of the movable seats 303, see [reference] Figure 12 and Figure 13 If the size of the cutting surface of the material plate 500 is first determined by the first measurement module 304a, the second measurement module 304b, the third measurement module 304c, and the fourth measurement module 304d, then the moving base 303, which is equipped with the position measurement module 304 and the wire-laying device, is moved to positions I, II, and III to sequentially apply laser beams. The camera assembly 400 observes the beams approaching the bulge position to first determine the two points of the bulge in the lateral direction. Then, based on the changes in the laser beams, the beams will twist when they encounter the bulge. When the beams twist to their maximum extent, the two points closest to the bulge are recorded. A preset frame can be generated based on these four points, containing the bulge. Further, a coordinate plane is established using the cutting surface, and the size of the cutting surface is determined by... Figure 12 or Figure 13 By knowing the specific coordinates of the four points on the coordinate plane, the size of the bulge can be calculated using the coordinate values.

[0058] See Figure 12 and Figure 13 The bulge occurs in the lower left corner and center of the material plate 500. The camera assembly 400 can detect the location of the bulge on the material plate 500. Upon receiving feedback on the bulge's location, the system controls the wire bonding device to operate. (See also...) Figure 14 At this point, the wire punch is activated and moved from position I to position III. Then, the camera component 400 observes the location of the maximum twist of the wire harness and records the two points D1 and D2 where the wire harness intersects with the bulge.

[0059] Based on Embodiment 1 and Embodiment 2, the supplementary steps of this embodiment are as follows: S31, if the camera component 400 does not detect a missing corner or bulge on the material plate 500, proceed to step S4; if the camera component 400 detects a missing corner on the material plate 500, proceed to step S32; if the camera component 400 detects a bulge on the material plate 500, proceed to step S33; if both a missing corner and a bulge exist, S32 and S33 can be executed separately. The remaining steps in this embodiment are consistent with those in Embodiment 1, except that the bulge defect handling process in step S33 specifically includes the following steps: S331. Based on the image data collected by the camera component 400, the system determines the location of the bulge defect on the material plate 500 and drives the movable seat 303 equipped with the laser wire drawing device to move to the area corresponding to the bulge defect.

[0060] S332. Start the laser wire marking machine, drive the moving seat 303 to move the laser wire marking machine along the length direction of the bed 101 to the preset positions I, II and III in sequence, and project a linear laser beam onto the surface of the material plate 500. The linear laser beam extends along the width direction of the bed 101. The camera component 400 collects the image of the laser beam in real time, identifies the twist position of the laser beam, and records the two points where the laser beam intersects with the bulge defect along the length direction, which are recorded as D1 and D2 respectively.

[0061] S333, the drive moving seat 303 drives the laser wire punch to move along the length direction of the bed 101, and projects a linear laser beam that extends along the length direction of the bed 101 and sweeps across the entire bulge defect; the camera component 400 collects the image of the laser beam in real time, identifies the maximum twist position of the laser beam, and records the two points where the laser beam intersects with the edge of the bulge defect, which are denoted as D3 and D4 respectively.

[0062] S334. Using D1, D2, D3, and D4 as references, establish a planar coordinate system based on the working surface. Generate a rectangular defect avoidance frame that encompasses the entire bulge defect using the coordinate values ​​of the four points. Remove the unusable area corresponding to the rectangular defect avoidance frame within the available cutting surface to complete the update of the available cutting surface.

[0063] The bulge defect handling process in this embodiment can determine the location, boundary and size of the bulge defect on the surface of the material plate 500, and generate a corresponding defect avoidance frame. It does not require replacing the entire material plate 500, which helps to reduce production costs and ensures the smooth progress of the cutting operation, avoiding poor cutting caused by bulge defects.

[0064] It should be noted that the corner-missing defect addressed in Embodiment 2 and the bulging defect addressed in Embodiment 3 may occur individually or simultaneously on the same material board 500 in actual production scenarios. The two embodiments disclosed above disclose identification and measurement methods for two different types of defects. They are logically parallel and can be implemented independently or in combination. Both Embodiment 2 and Embodiment 3 utilize the collaborative work of the measuring component 300 and the camera component 400 to quantify unusable defect areas into rectangular avoidance frames.

[0065] Specifically, when the camera component 400 detects both a missing corner defect at the edge of the material plate 500 and a bulge defect in the non-edge area during the detection in step S3, the control unit can sequentially call steps S321 to S324 in Embodiment 2 to generate a first defect avoidance frame, and steps S331 to S334 in Embodiment 3 to generate a second defect avoidance frame. Subsequently, the control unit removes the corresponding areas of the first and second defect avoidance frames within the initial available cutting area, thereby completing the update of the available cutting area.

[0066] In this invention, unless otherwise explicitly specified and limited, the terms "connection," "fixed," etc., should be interpreted broadly. For example, "fixed" can mean a fixed connection, a detachable connection, or an integral part; it can mean a mechanical connection or an electrical connection; it can mean a direct connection or an indirect connection through an intermediate medium; it can mean the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0067] Furthermore, the technical solutions of the various embodiments of the present invention can be combined with each other, but only if they are feasible for those skilled in the art. If the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such combination of technical solutions does not exist and is not within the scope of protection claimed by the present invention.

Claims

1. A plate cutting device based on a fixed area, characterized in that, include: Machine tool assembly (100) includes a working surface for carrying a material plate (500); A moving component (200) is located above the working surface, and a laser cutting blade is provided on its moving end to drive the laser cutting blade to move along the length and width directions of the working surface; The measuring component (300) includes at least two sets of position measuring modules (304) installed on both sides of the working surface in the length direction. The position measuring modules (304) are configured to move along the length direction of the working surface and emit measuring beams toward the side of the material plate (500) to obtain edge position data of the material plate (500). Camera assembly (400) for capturing images of the entire work surface; The control unit is electrically connected to the moving component (200), the measuring component (300), and the camera component (400), respectively; The control unit is configured to: control each group of position measurement modules (304) to scan the edge of the material plate (500) and establish an initial available cutting area that matches the current size of the material plate (500); generate a minimum rectangular envelope frame as a first preset contour for each contour to be cut; arrange multiple first preset contours in an array within the initial available cutting area to generate a minimum rectangular boundary surrounding the arrangement as a second preset contour; and remove the second preset contour within the initial available cutting area to obtain a blank area. Within the available cutting area, the target contour array is placed, and the maximum number of cuts and the area of ​​the blank area are calculated; and When the camera component (400) detects a corner defect in the material plate (500), it controls the position measurement module (304) closest to the corner defect to move along the length direction of the working surface, scans and obtains the two extreme positions and the maximum depth of the corner defect along the length direction, and generates a rectangular defect avoidance box based on the two extreme positions and the maximum depth, and removes the rectangular defect avoidance box in the available cutting area to update the available cutting area; The measuring component (300) also integrates a laser beam projector, which is used to project a linear laser beam onto the upper surface of the material plate (500). The control unit is further configured to: when the camera assembly (400) detects a bulge defect in the material plate (500), control the movable seat (303) equipped with the laser wire-piercing device to move to the area corresponding to the bulge defect, drive the movable seat (303) to move along the length direction of the working surface and project a line laser extending along the width direction to obtain two intersection points, and drive the movable seat (303) to move along the width direction of the working surface and project a line laser extending along the length direction to obtain two more intersection points, generate a rectangular defect avoidance frame based on the four intersection points, and remove the rectangular defect avoidance frame in the available cutting area to update the available cutting area.

2. The material plate cutting device based on a fixed area according to claim 1, characterized in that, The number of position measurement modules (304) is four, which are respectively referred to as the first measurement module (304a), the second measurement module (304b), the third measurement module (304c) and the fourth measurement module (304d). When working, the four sets of position measurement modules (304) correspond to the four corner areas of the material plate (500) to define the boundary contour of the material plate (500).

3. The material plate cutting device based on a fixed area according to claim 2, characterized in that, The measuring assembly (300) also includes a lead screw module (301), a nut block (302), and a moving base (303); The lead screw module (301) extends along the length of the working surface and is mounted on the bed (101) of the machine tool assembly (100); The nut block (302) is sleeved on the screw of the lead screw module (301); The movable seat (303) is fixedly connected to the nut block (302), the position measurement module (304) is installed on the movable seat (303), and the lead screw module (301) drives the nut block (302) and the movable seat (303) to move back and forth synchronously along the length direction of the working surface.

4. The material plate cutting device based on a fixed area according to claim 3, characterized in that, The measuring component (300) also includes a protective shell (306), which is fixed to the upper side surface of the bed (101). The protective shell (306) is provided with a slide rail inside, and the movable seat (303) is slidably disposed on the slide rail. The protective shell (306) has an opening (3062) on the side facing the working surface. A glass cover (307) is installed at the opening (3062). The measuring beam emitted by the position measuring module (304) passes through the glass cover (307) and irradiates the side wall of the material plate (500).

5. The material plate cutting device based on a fixed area according to claim 1, characterized in that, The machine tool assembly (100) also includes a back plate (102) and a telescopic cylinder (103). The back plate (102) is disposed at one end of the working surface along the length direction. The telescopic cylinder (103) is driven to connect with the back plate (102) and is used to drive the back plate (102) to rise and fall, so as to stop and position the material plate (500) entering the working surface.

6. A cutting method for a material plate cutting device based on a fixed area, characterized in that, A plate cutting device based on a fixed region as described in any one of claims 1 to 5, comprising the following steps: S1. Determine the first reference edge and width of the material plate using the position measurement module on the reference side; S2. Drive the position measurement module on the opposite side to move along the length of the bed to determine the second reference edge and its length, and define the initial available cutting area; S3. Detect defects using the camera component. If a defect exists, drive the adjacent position measurement module to scan and generate a defect avoidance area, and update the available cutting area. S4. Arrange the outline of target A within the available cutting area, determine the maximum number of cuts, and record the remaining area as the blank area. S5. Based on the size of the blank area, filter the outline of target B and perform secondary layout. If there is still room, continue to iterate and fill smaller outlines until they cannot be accommodated or the preset number of times is reached. S6. Perform cutting according to the layout path and record the cutting parameters for this cutting to form empirical data for subsequent use on the same size slabs.

7. The cutting method of a material plate cutting device based on a fixed region according to claim 6, characterized in that, Step S3, the handling of the missing corner defect, includes: The measurement module closest to the missing corner is selected as the detection module; The drive detection module moves along the length of the bed to obtain the two extreme positions of the missing corner along the length direction; The drive detection module moves along the length of the bed to obtain the maximum depth of the missing corner. A rectangular defect avoidance area is generated based on the two extreme positions and the maximum depth.

8. The cutting method of a material plate cutting device based on a fixed area according to claim 7, characterized in that, Step S3, the handling of the bulge defect, includes: Drive the movable base equipped with a laser wire-piercing device to the area corresponding to the bulge; The driving motion seat moves along the first direction of the bed and projects a line laser extending along the second direction, recording the two intersection points of the line laser twist; The driving motion seat moves along the second direction of the bed and projects a line laser extending along the first direction, recording the two intersection points of the line laser twist; A rectangular defect avoidance area is generated based on the four intersection points.

9. The cutting method of a material plate cutting device based on a fixed region according to claim 6, characterized in that, The method further includes: The system records the size, layout path and outline combination of the material plate (500) to be cut, forming historical experience data; when a material plate (500) whose size matches the historical experience data is detected in the future, the corresponding historical cutting path is directly called to perform the cutting operation.

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