Plate edge searching mechanism, cutting machine and plate edge searching method

Abstract

The invention relates to the technical field of cutting machines, in particular to a plate edge searching mechanism, a cutting machine and a plate edge searching method. The plate edge searching mechanism comprises a carrying table, a moving frame and a measuring assembly, the carrying table is used for carrying a rectangular plate, and the plate is provided with at least five initial points. The moving frame is located above the carrying table and comprises a first guide rail extending in the X-axis direction of the coordinate system and second guide rails extending in the Y-axis direction of the coordinate system, and the first guide rail is provided with at least two second guide rails in a spaced and sliding mode in the X-axis direction. A measuring assembly is slidably mounted on each second guide rail in the Y-axis direction and comprises a distance measuring part, and the distance measuring parts can move from initial points in the X-axis direction or the Y-axis direction, measure the height value of the plate and stop moving when the measured value exceeds a set value so as to obtain edge points corresponding to the initial points. The plate edge searching method is applied to the plate edge searching mechanism, the edge searching efficiency of the plate is improved, and the production requirements of a flow line are met.

Description

Technical Field

[0001] The present invention relates to the technical field of cutting machines, and in particular to a plate edge finding mechanism, a cutting machine and a plate edge finding method. Background Art

[0002] As labor and raw material costs rise year by year, manufacturers have put forward higher requirements on the operation methods and efficiency of cutting and blanking plates (generally metal plates). Before cutting the plate, the size and position of the plate need to be corrected to achieve precise cutting. The existing edge correction process of rectangular plates mainly relies on single-point laser sensors to detect the four sides of the plate one by one before cutting.

[0003] The above-mentioned edge-finding method uses a single-point laser sensor. When the length of large-size and large-format panels is long (generally more than ten meters or dozens of meters), the laser sensor needs to scan and measure all the long sides and all the wide sides of the panels. The entire edge-finding process is time-consuming and inefficient, and cannot meet the needs of fully automatic assembly line production. Summary of the invention

[0004] The object of the present invention is to provide a plate edge-finding mechanism, a cutting machine and a plate edge-finding method, so as to improve the edge-finding efficiency of the plate and meet the production requirements of the assembly line.

[0005] To achieve this purpose, the technical solution adopted by the present invention is:

[0006] Plate edge finding mechanism, including:

[0007] A carrier, used for carrying a rectangular plate, wherein the plate has at least five initial points;

[0008] A movable frame is located above the carrier, the movable frame comprises a first guide rail extending along the X-axis direction of the coordinate system and a second guide rail extending along the Y-axis direction, and at least two second guide rails are slidably arranged at intervals along the X-axis direction on the first guide rail;

[0009] A measuring component is provided on each of the second guide rails for sliding along the Y-axis direction, the measuring component comprising a distance measuring component, the distance measuring component can move from the initial point along the X-axis direction or the Y-axis direction and measure the height value of the plate and can stop moving when the measured value exceeds a set value, so as to obtain an edge point corresponding to each of the initial points, each of the three sides of the plate has at least one edge point, and the other side has at least two edge points.

[0010] As an optional solution for the plate edge-finding mechanism, the measuring assembly further comprises a measuring frame, one end of which is slidably disposed on the second guide rail along the Y-axis direction, and the other end of which extends out of the second guide rail and is equipped with the distance measuring component.

[0011] As an optional solution of the plate edge-finding mechanism, a first sliding groove is provided at one end of the measuring frame, and the second guide rail is slidably matched with the first sliding groove.

[0012] As an optional solution of the plate edge-finding mechanism, the measuring assembly further includes a first driving member, which is drivingly connected to the measuring frame to drive the measuring frame to move along the Y-axis direction on the second guide rail.

[0013] As an optional solution for the plate edge-finding mechanism, the movable frame includes two first guide rails spaced apart along the Y-axis direction, and both ends of the second guide rail along the Y-axis direction are provided with second sliding grooves slidably matched with the corresponding first guide rails.

[0014] As an optional solution of the plate edge-finding mechanism, the distance measuring component is a laser distance measuring sensor.

[0015] A cutting machine comprises the above-mentioned plate edge-finding mechanism.

[0016] The plate edge finding method is applied to the plate edge finding mechanism mentioned above, and the plate edge finding method comprises the following steps:

[0017] S1: establishing the coordinate system on the stage, wherein the first guide rail extends along the X-axis direction of the coordinate system, and at least two of the second guide rails extend along the Y-axis direction of the coordinate system;

[0018] S2: Select five initial points on the plate on the stage;

[0019] S3: at least two of the distance measuring components are respectively moved to directly above different initial points, and then move along the X-axis direction or the Y-axis direction;

[0020] S4: when the detection value of the distance measuring component exceeds the set value, marking the coordinates of the distance measuring component and using them as the coordinates of the corresponding edge point;

[0021] S5: at least two of the distance measuring components jointly complete the measurement of at least five of the initial points to obtain the coordinates of the corresponding edge points, the three sides of the plate having at least one edge point, and the other side having at least two edge points;

[0022] S6: Substitute the coordinates of at least five edge points into the coordinate system to obtain the length and width of the plate and the deflection angle relative to the X-axis direction or the Y-axis direction.

[0023] As an optional solution of the plate edge finding method, in step S3, at least two of the distance measuring components perform measurement simultaneously, and one of the distance measuring components measures at least three of the initial points respectively, and the other of the distance measuring components measures at least two of the initial points respectively.

[0024] As an optional solution of the plate edge-finding method, in step S3, the second guide rail moves along the first guide rail and stops moving when the detection value of the distance measuring component exceeds the set value; or, the distance measuring component moves along the second guide rail and stops moving when the detection value of the distance measuring component exceeds the set value.

[0025] The beneficial effects of the present invention are:

[0026] The plate edge finding mechanism proposed by the present invention has at least two second guide rails slidably installed on the first guide rail along the X-axis direction, and a distance measuring component is slidably installed on each second guide rail along the Y-axis direction, so that the distance measuring component can move along the X-axis direction and the Y-axis direction. By selecting at least five initial points on the plate, the distance measuring component determines whether the distance measuring component has moved to the side edge of the plate according to whether the measured value exceeds the set value, thereby obtaining the coordinates of the corresponding edge point according to the moving distance of the distance measuring component. The three sides of the plate have at least one edge point, and the other side has at least two edge points. The at least five edge points are substituted into the established coordinate system, and finally the length and width of the plate and the deflection angle relative to the X-axis direction or the Y-axis direction are obtained. The calibration of at least five edge points is completed by at least two distance measuring components together, so as to avoid a single distance measuring component from moving too far and taking too long to find the edge of a large-sized (i.e., large-format) plate, thereby improving the edge finding efficiency of the plate and meeting the production requirements of the assembly line.

[0027] The cutting machine proposed in the present invention includes the above-mentioned plate edge-finding mechanism, which improves the edge-finding efficiency of the plate, thereby improving the cutting efficiency of the plate and meeting the production requirements of the assembly line.

[0028] The plate edge-finding method proposed in the present invention is applied to the plate edge-finding mechanism mentioned above, thereby improving the edge-finding efficiency of the plate and meeting the production requirements of the assembly line. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 is a structural schematic diagram of a plate edge-finding mechanism provided by an embodiment of the present invention;

[0030] Figure 2 It is a main flow chart of the panel edge finding method provided by an embodiment of the present invention.

[0031] In the figure:

[0032] 10, plate; 20, initial point; 30, edge point;

[0033] 1. First guide rail; 2. Second guide rail; 3. Distance measuring component; 4. Measuring frame; 5. First driving member; 6. Second driving member. DETAILED DESCRIPTION

[0034] In order to make the technical problems solved by the present invention, the technical solutions adopted and the technical effects achieved clearer, the technical solutions of the present invention are further described below in conjunction with the accompanying drawings and through specific implementation methods. It is understood that the specific embodiments described herein are only used to explain the present invention, rather than to limit the present invention. It should also be noted that, for the convenience of description, only the parts related to the present invention are shown in the accompanying drawings, not all.

[0035] In the description of the present invention, unless otherwise clearly specified and limited, the terms "connected", "connected", and "fixed" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0036] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0037] In the description of this embodiment, the terms "upper", "lower", "right", "left" and other directions or positional relationships are based on the directions or positional relationships shown in the drawings, and are only for the convenience of description and simplification of operation, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operate in a specific direction, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are only used to distinguish in the description and have no special meaning.

[0038] The technical solution of the present invention is further described below with reference to the accompanying drawings and through specific implementation methods.

[0039] This embodiment provides a cutting machine, which is mainly used to cut rectangular steel plates. Before cutting the steel plates, the size and position of the plates need to be corrected to achieve accurate cutting.

[0040] The existing edge-finding method uses a single-point laser sensor. When the length of large-size and large-format panels is long, the laser sensor needs to scan and measure all the long sides and all the wide sides of the panels, making the entire edge-finding process time-consuming and inefficient, and unable to meet the production needs of fully automatic assembly lines.

[0041] To solve the above problems, Figure 1 As shown, this embodiment also proposes a plate edge-finding mechanism, which includes a carrier, a mobile frame and a measuring component. The carrier is used to carry a rectangular plate 10, and the plate 10 has at least five initial points 20. The mobile frame is located above the carrier, and the mobile frame includes a first guide rail 1 extending along the X-axis direction of the coordinate system and a second guide rail 2 extending along the Y-axis direction. The first guide rail 1 is provided with at least two second guide rails 2 spaced and slidably arranged along the X-axis direction. A measuring component is slidably mounted on each second guide rail 2 along the Y-axis direction, and the measuring component includes a distance measuring component 3, which can move from the initial point 20 along the X-axis direction or the Y-axis direction and measure the height value of the plate 10 and can stop moving when the measured value exceeds the set value, so as to obtain the edge point 30 corresponding to each initial point 20, and each of the three sides of the plate 10 has at least one edge point 30, and the other side has at least two edge points 30.

[0042] Since at least two second guide rails 2 are slidably mounted on the first guide rail 1 along the X-axis direction, and a distance measuring component 3 is slidably mounted on each second guide rail 2 along the Y-axis direction, the distance measuring component 3 can move along the X-axis direction and the Y-axis direction. By selecting at least five initial points 20 on the plate 10, the distance measuring component 3 determines whether the distance measuring component 3 has moved to the side edge of the plate 10 according to whether the measured value exceeds the set value, thereby obtaining the coordinates of the corresponding edge point 30 according to the moving distance of the distance measuring component 3. Each of the three sides of the plate 10 has at least one edge point 30, and the other side has at least two edge points 30. Substituting the at least five edge points 30 into the established coordinate system, the length and width of the plate 10 and the deflection angle relative to the X-axis direction or the Y-axis direction are finally obtained. At least five edge points 30 are calibrated by at least two distance measuring components 3, thereby preventing a single distance measuring component 3 from moving too far and taking too long to find the edge of a large-sized (i.e., large-format) plate 10, thereby improving the edge finding efficiency of the plate 10 and meeting the production requirements of the assembly line.

[0043] It should be noted that the distance measuring component 3 is a laser distance measuring sensor, which is small in size, easy to install and use, and has high measurement accuracy, which improves the accuracy of edge point calibration. The distance measuring component 3 can also be an infrared rangefinder, etc. The second guide rail 2 is the bed of the cutting machine, and the two beds slide along the X-axis direction on the first guide rail 1 respectively, without the need to install additional guide rails, so as to make full use of the existing components of the cutting machine and reduce costs.

[0044] In this embodiment, the following is established: Figure 1 In the plane coordinate system shown in , at least five initial points 20 are selected on the rectangular plate 10 placed on the stage, and the coordinates of each initial point 20 are known. The two distance measuring components 3 jointly complete the calibration of the edge points 30 corresponding to the five initial points 20 to improve the edge finding efficiency of the plate 10. In other embodiments, the number of second guide rails 2 and distance measuring components 3 can be increased according to demand to further improve the edge finding efficiency of the plate 10.

[0045] like Figure 1 As shown, the initial points 20 of this embodiment have five, namely Figure 1 A1, A2, B1, B2 and B3, the corresponding five edge points 30 are a1, a2, b1, b2 and b3 respectively. When marking the edge point a1, the second guide rail 2 moves along the X-axis direction on the first guide rail 1, and then the distance measuring component 3 moves along the Y-axis direction on the second guide rail 2 until the distance measuring component 3 moves to the top of the initial point A1. At this time, the coordinate value of the distance measuring component 3 in the coordinate system is the same as the initial point A1 directly below. Then the distance measuring component 3 moves along the Y-axis direction on the second guide rail 2 (moves along the dotted track in the initial point A1), and the distance measuring component 3 measures the height value of the plate 10. When the measured value of the distance measuring component 3 exceeds the set value, it means that the distance measuring component 3 has moved to a side edge of the plate 10. At this time, the coordinate of the distance measuring component 3 in the coordinate system is the coordinate value of the edge point a1, thereby completing the calibration of the edge point a1. When marking edge point a2, the second guide rail 2 moves along the X-axis direction on the first guide rail 1, and then the distance measuring component 3 moves along the Y-axis direction on the second guide rail 2 until the distance measuring component 3 moves to the top of the initial point A2. At this time, the coordinate value of the distance measuring component 3 in the coordinate system is the same as the initial point A2 directly below. Then the distance measuring component 3 moves along the X-axis direction on the first guide rail 1 with the second guide rail 2 (moves along the dotted track in the initial point A2), and the distance measuring component 3 measures the height value of the plate 10. When the measured value of the distance measuring component 3 exceeds the set value, it means that the distance measuring component 3 has moved to the edge of the other side of the plate 10. At this time, the coordinate of the distance measuring component 3 in the coordinate system is the coordinate value of the edge point a2, thereby completing the calibration of the edge point a2. Since the calibration process of edge points b1, b2 and b3 is the same as that of edge points a1 and a2, the calibration process of other edge points 30 will not be repeated.

[0046] In this embodiment, when the distance measuring component 3 has not moved to the side edge of the plate 10, the measurement value of the distance measuring component 3 is the height value between the upper surface of the plate 10 and the distance measuring component 3. When the distance measuring component 3 moves to the side edge of the plate 10, the measurement value of the distance measuring component 3 is the height value between the upper surface of the platform where the plate 10 is located and the distance measuring component 3, so that the measurement value has a step mutation at the edge of the side of the plate 10, that is, the measurement value suddenly increases, so that the measurement value exceeds the set value, which is the height value between the upper surface of the plate 10 and the distance measuring component 3, so as to judge that the distance measuring component 3 has reached the edge position of one of the side edges of the plate 10.

[0047] Specifically, a1, a2, b2 and b3 are respectively on the four sides of the plate 10, and a1 and b1 are on the same side. Therefore, a1 and b1 jointly determine the first side of the plate 10, and the deflection angle β of the first side relative to the X-axis direction. The second side where a2 is located and the third side where b2 is located are both perpendicular to the first side. Therefore, the straight lines where the second and third sides are located can be determined according to a1, a2, b1 and b2, and then the straight line where the fourth side is located can be determined according to the edge point b3, so that the length and width dimensions and the deflection angle of the plate 10 are determined according to the five edge points 30, and the edge finding operation of the plate 10 is realized.

[0048] like Figure 1 As shown, the measuring assembly further includes a measuring frame 4, one end of which is slidably disposed on the second guide rail 2 along the Y-axis direction, and the other end of the measuring frame 4 extends out of the second guide rail 2 and is installed with a distance measuring component 3. The end of the measuring frame 4 extending out of the second guide rail 2 forms a cantilever structure and is installed with the distance measuring component 3, so that the distance measuring component 3 is located outside the second guide rail 2 to avoid the second guide rail 2 from blocking or interfering with the distance measuring component 3.

[0049] Furthermore, a first slide groove is provided at one end of the measuring frame 4, and the second guide rail 2 is slidably matched with the first slide groove. Through the sliding match between the measuring frame 4 and the second guide rail 2, the measuring frame 4 can slide stably on the second guide rail 2, and the moving accuracy of the distance measuring component 3 is improved.

[0050] like Figure 1 As shown, the measuring assembly further includes a first driving member 5, which is in driving connection with the measuring frame 4 to drive the measuring frame 4 to move along the Y-axis direction on the second guide rail 2. The first driving member 5 is a servo motor, which has high control accuracy and can drive the measuring frame 4 and the distance measuring component 3 to move accurately on the second guide rail 2, thereby ensuring the movement accuracy of the distance measuring component 3, thereby improving the accuracy of the edge point 30 calibration, which is beneficial to improving the edge finding accuracy of the plate.

[0051] like Figure 1As shown, the mobile frame includes two first guide rails 1 spaced apart along the Y-axis direction, and the second guide rail 2 is provided with a second slide groove slidably matched with the corresponding first guide rail 1 at both ends along the Y-axis direction. By increasing the number of first guide rails 1, the second guide rail 2 moves along the X-axis direction between the two first guide rails 1, avoiding positional deviation of the second guide rail 2 and improving the movement accuracy of the second guide rail 2. At the same time, each second guide rail 2 is slidably matched with the two first guide rails 1 through two second slide grooves, further improving the movement accuracy of the second guide rail 2 on the first guide rail 1.

[0052] Specifically, the plate edge finding mechanism also includes a second driving member 6, and each second guide rail 2 is respectively connected to a second driving member 6 at both ends along the Y-axis direction, so that the two second driving members 6 synchronously drive the same second guide rail 2 to move along the X-axis direction on the first guide rail 1. The second driving member 6 is a servo motor, which has high control accuracy and can drive the second guide rail 2 and the distance measuring component 3 to move accurately on the first guide rail 1, thereby ensuring the movement accuracy of the distance measuring component 3, thereby improving the accuracy of the edge point 30 calibration, which is beneficial to improving the edge finding accuracy of the plate. It can be understood that the above-mentioned first driving member 5 and the second driving member 6 can also be other conventional driving components such as hydraulic cylinders or cylinders, which are not specifically limited here.

[0053] like Figure 2 As shown, this embodiment further proposes a plate edge finding method, which is applied to the plate edge finding mechanism mentioned above, and includes the following steps:

[0054] S1: A coordinate system is established on the stage, wherein the first guide rail 1 extends along the X-axis direction of the coordinate system, and at least two second guide rails 2 extend along the Y-axis direction of the coordinate system.

[0055] S2: Select five initial points 20 on the plate 10 on the stage.

[0056] S3: At least two distance measuring components 3 are respectively moved to directly above different initial points 20, and then moved along the X-axis direction or the Y-axis direction.

[0057] S4: When the detection value of the distance measuring component 3 exceeds the set value, the coordinates of the distance measuring component 3 are marked and used as the coordinates of the corresponding edge point 30.

[0058] S5: At least two distance measuring components 3 jointly complete the measurement of at least five initial points 20 to obtain the coordinates of corresponding edge points 30. The three sides of the plate 10 have at least one edge point 30, and the other side has at least two edge points 30.

[0059] S6: Substitute the coordinates of at least five edge points 30 into the coordinate system to obtain the length and width of the plate 10 and the deflection angle relative to the X-axis direction or the Y-axis direction.

[0060] The plate edge-finding method of the present embodiment is applied to the plate edge-finding mechanism mentioned above, which improves the edge-finding efficiency of the plate 10 and meets the production requirements of the assembly line.

[0061] Specifically, in step S3, at least two distance measuring components 3 perform measurements simultaneously, and one distance measuring component 3 measures at least three initial points 20 respectively, and the other distance measuring component 3 measures at least two initial points 20 respectively. Figure 1 As shown, this embodiment has two distance measuring components 3, one of which measures initial point A1 and initial point A2, thereby calibrating edge point a1 and edge point a2, and the other distance measuring component 3 measures initial point B1, initial point B2 and initial point B3, thereby calibrating edge point b1, edge point b2 and edge point b3. In the above steps S3 and S4, the two distance measuring components 3 simultaneously measure each initial point 20 and calibrate the edge point 30. One distance measuring component 3 measures two initial points 20, and the other distance measuring component 3 measures the remaining three initial points 20, so that the calibration of five edge points 30 is completed by the two distance measuring components 3, thereby avoiding long-distance and large-range movement of a single second guide rail 2 along the X-axis direction or the Y-axis direction, shortening the edge finding time, and improving the edge finding efficiency of the plate 10.

[0062] Further, in step S3, the second guide rail 2 moves along the first guide rail 1 and stops moving when the detection value of the distance measuring component 3 exceeds the set value; or, the distance measuring component 3 moves along the second guide rail 2 and stops moving when the detection value of the distance measuring component 3 exceeds the set value. When the distance measuring component 3 moves to the side edge of the plate 10, the measurement value of the distance measuring component 3 undergoes a step change at the edge of the side of the plate 10, that is, the measurement value suddenly increases, so that the measurement value exceeds the set value, thereby judging that the distance measuring component 3 has reached the edge position of the side of the plate 10. At this time, the first driving member 5 and the second driving member 6 stop driving the distance measuring component 3 to move, so as to accurately obtain the moving distance of the distance measuring component 3 (the coordinates of the distance measuring component 3), so as to obtain the corresponding coordinate value of the edge point 30 according to the coordinate of the initial point 20, so as to ensure the accuracy of the calibration of the edge point 30.

[0063] The above embodiments are only to illustrate the basic principles and characteristics of the present invention. The present invention is not limited by the above embodiments. Without departing from the spirit and scope of the present invention, the present invention may be subject to various changes and modifications, which are within the scope of the present invention. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. Plate edge finding mechanism, characterized in that: include: A carrier, used for carrying a rectangular plate (10), wherein the plate (10) has at least five initial points (20); A movable frame is located above the carrier, the movable frame comprising a first guide rail (1) extending along the X-axis direction of the coordinate system and a second guide rail (2) extending along the Y-axis direction, the first guide rail (1) being provided with at least two second guide rails (2) spaced apart and slidably arranged along the X-axis direction; A measuring component is provided on each of the second guide rails (2) so as to be slidably mounted along the Y-axis direction, the measuring component comprising a distance measuring component (3), the distance measuring component (3) being capable of moving from the initial point (20) along the X-axis direction or the Y-axis direction and measuring the height value of the plate (10) and being capable of stopping movement when the measured value exceeds a set value, so as to obtain an edge point (30) corresponding to each of the initial points (20), the three sides of the plate (10) each having at least one edge point (30), and the other side having at least two edge points (30).

2. The plate edge-finding mechanism according to claim 1, characterized in that: The measuring assembly further comprises a measuring frame (4), one end of the measuring frame (4) being slidably arranged on the second guide rail (2) along the Y-axis direction, and the other end of the measuring frame (4) extending out of the second guide rail (2) and being mounted with the distance measuring component (3).

3. The plate edge-finding mechanism according to claim 2, characterized in that: A first sliding groove is provided at one end of the measuring frame (4), and the second guide rail (2) is slidably matched with the first sliding groove.

4. The plate edge-finding mechanism according to claim 2, characterized in that: The measuring assembly further comprises a first driving member (5), the first driving member (5) being in driving connection with the measuring frame (4) so ​​as to drive the measuring frame (4) to move along the Y-axis direction on the second guide rail (2).

5. The plate edge-finding mechanism according to any one of claims 1 to 4, characterized in that: The movable frame comprises two first guide rails (1) spaced apart along the Y-axis direction, and the second guide rail (2) is provided with second sliding grooves slidably matched with the corresponding first guide rails (1) at both ends along the Y-axis direction.

6. The plate edge-finding mechanism according to any one of claims 1 to 4, characterized in that: The distance measuring component (3) is a laser distance measuring sensor.

7. A cutting machine, characterized in that It comprises the plate edge-finding mechanism described in any one of claims 1 to 6.

8. A plate edge finding method, characterized in that: The plate edge-finding mechanism applied to any one of claims 1 to 6, wherein the plate edge-finding method comprises the following steps: S1: establishing the coordinate system on the carrier, wherein the first guide rail (1) extends along the X-axis direction of the coordinate system, and at least two of the second guide rails (2) extend along the Y-axis direction of the coordinate system; S2: Selecting five initial points (20) on the plate (10) on the carrier; S3: at least two of the distance measuring components (3) are respectively moved to directly above different initial points (20), and then move along the X-axis direction or the Y-axis direction; S4: when the detection value of the distance measuring component (3) exceeds the set value, marking the coordinates of the distance measuring component (3) and using them as the coordinates of the corresponding edge point (30); S5: at least two of the distance measuring components (3) jointly complete the measurement of at least five of the initial points (20) to obtain the coordinates of the corresponding edge points (30), the three sides of the plate (10) having at least one edge point (30), and the other side having at least two edge points (30); S6: Substituting the coordinates of at least five edge points (30) into the coordinate system to obtain the length and width dimensions of the plate (10) and the deflection angle relative to the X-axis direction or the Y-axis direction.

9. The plate edge finding method according to claim 8, characterized in that: In step S3, at least two of the distance measuring components (3) perform measurements simultaneously, and one of the distance measuring components (3) measures at least three of the initial points (20) respectively, and the other of the distance measuring components (3) measures at least two of the initial points (20) respectively.

10. The plate edge finding method according to claim 8, characterized in that: In step S3, the second guide rail (2) moves along the first guide rail (1) and stops moving when the detection value of the distance measuring component (3) exceeds the set value; or, the distance measuring component (3) moves along the second guide rail (2) and stops moving when the detection value of the distance measuring component (3) exceeds the set value.

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