Panel sampling device and method of use thereof

Abstract

The present application relates to a kind of plate sampling device and its using method, the sampling device includes plate cutting unit and backup plate group, sample plate collection area is provided below the backup plate group, the backup plate group includes first backup plate and second backup plate sequentially arranged along the direction of plate running, two backup plates are rotatably arranged below plate cutting unit, two backup plates are respectively connected with swing driving mechanism to have the supporting position suitable for supporting plate and the avoidance position that is lowered relative to supporting position, the direction of first backup plate is counterclockwise direction, the direction of second backup plate is clockwise direction.The present application can consider the needs of plate head and tail sampling, plate sampling device simple structure, easy to operate, but can obtain higher operation reliability.

Description

Technical Field

[0001] This invention relates to a plate sampling device and its usage method. Background Technology

[0002] For high-strength steel finished plates, cutting devices with both online sampling and slitting functions are relatively rare. To meet the needs of product sampling or fixed-length slitting, mechanical shearing or off-line manual flame cutting methods can be used. Off-line manual flame cutting is inefficient, and produces poor cut surfaces and a large heat-affected zone, so it is generally not recommended. Mechanical shearing for high-strength steel plates mainly presents the following problems:

[0003] (1) For high-strength steel plates with a strength of 1500MPa and above, if mechanical shears are used, the shear blade material itself is not strong enough. During shearing, the shear blade is prone to breakage under large impact loads, and continuous and stable shearing is not possible.

[0004] (2) Traditional mechanical shears are prone to quality problems such as roughness, slag buildup, and edge collapse at the cut surface;

[0005] (3) For continuously running steel plates, the traditional cutting process generally uses a cutting head or roller conveyor with encoder for head positioning, and then cuts to length; the former has a low yield and affects the production rhythm; the latter generally does not meet the requirements for length accuracy.

[0006] (4) Traditional cutting process uses a fixed shear blade. If the steel plate deviates, the straightness of the steel plate cut to length cannot meet the product requirements.

[0007] (5) Traditional cutting processes use fixed shear blades, which can only perform one-time cross-cutting on steel plates after positioning, and cannot meet the requirements of some irregular cutting.

[0008] (6) The transmission cutting process can only sample the head or tail of the steel plate, and cannot simultaneously perform head and tail sampling functions. Summary of the Invention

[0009] This invention relates to a plate sampling device and its usage method, which can at least solve some of the defects of the prior art.

[0010] This invention relates to a plate sampling device, comprising a plate cutting unit and a tray assembly. A sample collection area is provided below the tray assembly. The tray assembly includes a first tray and a second tray arranged sequentially along the plate running direction. Both trays are rotatably arranged below the plate cutting unit. Each tray is connected to a swing drive mechanism, thus each having a support position suitable for supporting the plate and a clearance position relative to the support position. The swing direction of the first tray is counterclockwise, and the swing direction of the second tray is clockwise.

[0011] As one implementation method, the plate cutting unit is positioned between the first pallet and the second pallet.

[0012] As one embodiment, the plate cutting unit includes a cutting device and a horizontal drive mechanism for driving the cutting device to move in a horizontal plane; the pallet group also includes a follow-up drive mechanism for driving the two pallets to follow the cutting device in the X direction.

[0013] As one implementation, the first tray and / or the second tray adopt a belt-driven pulley structure.

[0014] As one implementation method, a sample collection trough is provided in the sample collection area.

[0015] As one implementation method, a sample delivery track is also provided in the sample collection area, and the sample collection trough is movably arranged on the sample delivery track.

[0016] As one implementation method, the plate sampling device further includes an inlet conveying unit and an outlet conveying unit, which are located upstream and downstream of the pallet assembly, respectively.

[0017] As one implementation, the inlet conveying unit and / or the outlet conveying unit are equipped with a board material monitoring mechanism, which includes at least one of a length counting module for measuring the length of the board material, an end detection module for detecting the end position of the board material, and a vision detection module.

[0018] The present invention also relates to a method of using the above-mentioned plate sampling device, comprising:

[0019] When it is necessary to sample the head of the board, both the first pallet and the second pallet are in the supporting position, and the board is cut. After the head of the board is sampled and cut, the second pallet is lowered so that the sample falls into the sample collection area below.

[0020] When it is necessary to take a sample from the tail of the board, both the first pallet and the second pallet are in the support position, and the board is cut. After the sample is taken and cut at the tail of the board, the first pallet is lowered so that the sample falls into the sample collection area below.

[0021] When it is necessary to cut the board to a fixed length, the board is transported to the board sampling device so that both the first pallet and the second pallet are in the supporting position, and the board is cut to a fixed length.

[0022] As one implementation method, the above-described usage method further includes:

[0023] Before cutting, the board material is positioned. The board material is initially positioned using the main conveyor channel, and then the cutting equipment in the board material cutting unit is precisely positioned by translating along the X direction.

[0024] The present invention has at least the following beneficial effects:

[0025] The plate sampling device provided by this invention has a tray set below the plate cutting unit. When performing plate sampling, cutting, and length-cutting operations, the two trays can support the cut edge, ensuring the reliability and safety of the related operations. In particular, by designing the swing direction of the two trays, the sampling needs of both the head and tail of the plate can be taken into account. Specifically, after sampling and cutting at the head of the plate, the second tray swings down, and the sample can fall into the sample collection area below by its own weight. After sampling and cutting at the tail of the plate, the first tray swings down, and the sample can fall into the sample collection area below by its own weight. It can be seen that the above-mentioned plate sampling device has a simple structure, is easy to operate, and can achieve high operational reliability. Attached Figure Description

[0026] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0027] Figure 1 This is a schematic diagram of the structure of the plate sampling device provided in an embodiment of the present invention. Detailed Implementation

[0028] The technical solutions in the embodiments of the present invention will be clearly and completely described below. 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.

[0029] like Figure 1 This invention provides a plate sampling device, including a plate cutting unit and a tray assembly. A sample collection area is provided below the tray assembly. The tray assembly includes a first tray 21 and a second tray 22 arranged sequentially along the plate running direction. Both trays are rotatably arranged below the plate cutting unit. Each tray is connected to a swing drive mechanism, thus each having a support position suitable for supporting the plate and a clearance position relative to the support position. The swing direction of the first tray 21 is counterclockwise, and the swing direction of the second tray 22 is clockwise.

[0030] In one embodiment, the plate cutting unit adopts laser cutting or plasma cutting, which can efficiently cut steel plates and other plates, and can handle high-strength steel plates of any strength; and the cut surface is free of slag and collapse defects, thus ensuring the quality of the cut plate (for high-strength steel, the surface roughness of the cut surface can reach ≤Ra12.5).

[0031] Preferably, the aforementioned sheet metal cutting unit includes a cutting device 1 and a horizontal drive mechanism for driving the cutting device 1 to move in a horizontal plane; for laser cutting or plasma cutting, the cutting device 1 includes a cutting head 11. The horizontal drive mechanism can drive the cutting device 1 to generate X-axis and Y-axis displacements, ensuring the reliability and accuracy of the cutting operation. Even if the sheet metal deviates from its intended path, the cutting device 1 can still cut at the preset cutting position, and it can also meet the requirements for irregularly shaped cutting.

[0032] Furthermore, the aforementioned plate cutting unit may also include a vertical drive mechanism for driving the cutting device 1 to generate Z-axis displacement.

[0033] The aforementioned horizontal and vertical drive mechanisms include, but are not limited to, drive methods using servo motors and transmission mechanisms, such as lead screw mechanisms.

[0034] Preferably, such as Figure 1 The aforementioned sheet metal cutting unit also includes a pressure plate mechanism 12, which comprises a pressure plate and a lifting drive structure for driving the pressure plate to rise and fall. During cutting, the pressure plate presses down on both sides of the cutting seam, effectively preventing the sheet metal from springing back due to stress release at the cut edge. Specifically, by having one side of the pressure plate cooperate with the first support plate 21 and the other side with the second support plate 22, the sheet metal can be stably clamped, thereby improving cutting accuracy and quality. A guide structure can be configured for the lifting movement of the pressure plate to improve its smoothness; this guide structure can adopt a guide sleeve-guide post combination; furthermore, a buffer spring is sleeved on the guide post. When the pressure plate presses against the sheet metal surface, the buffer spring is further compressed, which can buffer and dampen vibrations while ensuring the clamping effect of the pressure plate. When the sheet metal rebounds after being cut, the rebound speed of the sheet metal can be effectively slowed down.

[0035] In one embodiment, the plate cutting unit is positioned between the first support plate 21 and the second support plate 22, which facilitates the cutting of the plate and the collection of the sample. Specifically, when the plate is stably supported by the first support plate 21 and the second support plate 22, the cutting quality of the plate can be guaranteed, and damage to the support plate by laser beams or plasma beams can be avoided. The downward swing of the corresponding side support plate facilitates the collection of the sample, for example, the sample falls naturally under its own weight.

[0036] Preferably, such as Figure 1 The aforementioned plate sampling device also includes an outer frame 4, on which the aforementioned plate cutting unit is mounted; the first support plate 21 and the second support plate 22 can also be mounted on the outer frame 4 via supports or the like, or can be rotatably connected to the outer frame 4 directly; the swing drive mechanism can also be mounted on the outer frame 4. The outer frame 4 can be made of steel, and is preferably designed as a sealed shell structure to block the smoke, noise, and glaring light generated during cutting.

[0037] For the processing of high-strength steel plates, the plate sampling device is preferably arranged online on the plate production line; when the first pallet 21 and the second pallet 22 are in the supporting position, they are preferably matched with the plate running channel, for example, at the same height as the steel wire, so as to facilitate the horizontal conveying of the plate; during the plate threading / tailing process, the first pallet 21 and the second pallet 22 can also support the plate well, thereby improving the reliability of plate production.

[0038] The board sampling device provided in this embodiment has a tray group set below the board cutting unit. When performing operations such as board sampling and cutting, and fixed-length slitting, the two trays can support the cut edge, ensuring the reliability and safety of the related operations. In particular, by designing the swing direction of the two trays, the sampling needs of the head and tail of the board can be taken into account. Specifically, after the head of the board is sampled and cut, the second tray 22 swings down, and the sample can fall into the sample collection area below by its own weight. After the tail of the board is sampled and cut, the first tray 21 swings down, and the sample can fall into the sample collection area below by its own weight. It can be seen that the above-mentioned board sampling device has a simple structure, is easy to operate, and can achieve high operational reliability.

[0039] Preferably, the pallet assembly further includes a follow-up drive mechanism for driving the two pallets to move in the X-direction relative to the cutting device 1. Based on this design, the relative X-direction position between the pallet assembly and the cutting device 1 can be kept constant, especially when the cutting position is between the first pallet 21 and the second pallet 22. The first pallet 21 and the second pallet 22 can move together in the X-direction, for example, by being connected as a whole by a bridging member.

[0040] In another embodiment, the first pallet 21 and the second pallet 22 can move independently in the X direction, for example, each of them can be equipped with an X-direction translational force unit. Based on this scheme, the X-direction positions of the first pallet 21 and the second pallet 22 can be adjusted separately, resulting in higher production flexibility and better adaptability. In particular, for longer or shorter samples, by adjusting the positions of the first pallet 21 and the second pallet 22, the sample can be supported more stably and reliably, and the sample can be smoothly dropped into the sample collection area. Furthermore, the cut sample can be adjusted away from the cutting head 11 to avoid damage to the cutting head 11 when the sample is flipped.

[0041] Therefore, the plate sampling device provided in this embodiment can meet the sampling operation of samples of various specifications.

[0042] For the X-axis translational movement of the pallet assembly, an X-axis guide rail is configured accordingly, and the first pallet 21 and the second pallet 22 are slidably mounted on the X-axis guide rail; the X-axis guide rail can be mounted on the aforementioned outer frame 4.

[0043] In one embodiment, the first pallet 21 and / or the second pallet 22 adopt a pulley structure, which includes a supporting belt, a pulley, and a belt drive unit. The supporting belt is used to support the plate material. The pulley structure is modular, allowing for overall swinging and translational motion. Preferably, the belt drive unit can drive the supporting belt to rotate forward and backward. In this design, in addition to supporting, the pallet also serves to transport the plate material. For longer or shorter samples, the first pallet 21 / second pallet 22 can adjust the position of the sample, not only supporting it more stably and reliably but also allowing it to fall smoothly into the sample collection area. Furthermore, it can adjust the cut sample away from the cutting head 11 to prevent damage to the cutting head 11 when the sample is flipped.

[0044] In one embodiment, the first tray 21 and / or the second tray 22 have a magnetic attraction function, for example, the supporting belt is a magnetic belt; based on this design, the tray can magnetically attract the plate, which can prevent the plate from rebounding due to stress release at the cut end after the plate is cut, thus preventing it from hitting the cutting head 11, etc. When used with the pressure plate, it can achieve a better effect in preventing the plate from rebounding.

[0045] In one embodiment, such as Figure 1 A sample collection trough 3 is provided in the sample collection area to collect samples. Furthermore, a sample delivery track is also provided in the sample collection area, and the sample collection trough 3 is movably mounted on the sample delivery track so that the samples can be output for subsequent testing, etc. The sample delivery track is preferably perpendicular to the running direction of the material.

[0046] Preferably, such as Figure 1 The opening of the sample collection trough 3 is a funnel shape that gradually widens upwards, which can better support the sample and prevent the sample from falling out of the trough.

[0047] Preferably, such as Figure 1 The plate sampling device also includes an inlet conveying unit 5 and an outlet conveying unit 6, which are located upstream and downstream of the pallet assembly, respectively, for conveying the plate to or from the cutting area. The conveying unit can be one or more of roller conveyors, discs, or conveyor belts. The conveying unit can be equipped with an encoder for initial positioning of the plate.

[0048] Furthermore, such as Figure 1 The inlet conveying unit 5 and / or the outlet conveying unit 6 are equipped with a board material monitoring mechanism. This mechanism includes at least one of the following: a length-counting module 71 for measuring the length of the board material, an end-detection module 72 for detecting the end position of the board material, and a vision detection module 73. The length-counting module 71 can use an encoder; the end-detection module 72 can use one or more of a through-beam photoelectric switch, a diffuse reflection photoelectric switch, or a proximity switch; and the vision detection module 73 can use one or more of a conventional camera, a high-speed camera, or other visual recognition systems. When the head of the board material passes by, the head can be accurately positioned using visual recognition. Furthermore, the vision detection module 73 can identify the deflection angle of the head to ensure a right-angle cut.

[0049] Preferably, both the inlet conveying unit 5 and the outlet conveying unit 6 are equipped with a plate monitoring mechanism; the plate monitoring mechanism preferably includes a length counting module 71, an end detection module 72 and a visual detection module 73.

[0050] This invention also provides a method for using the above-mentioned plate sampling device, including:

[0051] When it is necessary to sample the head of the board, both the first pallet 21 and the second pallet 22 are in the supporting position, and the board cutting operation is carried out. After the head of the board is sampled and cut, the second pallet 22 is lowered so that the sample falls into the sample collection area below.

[0052] When it is necessary to take a sample from the tail of the board, both the first pallet 21 and the second pallet 22 are in the supporting position for the board cutting operation. After the sample is taken and cut at the tail of the board, the first pallet 21 is lowered so that the sample falls into the sample collection area below.

[0053] Based on the specific structure of the plate sampling device, there are some corresponding operations in the above sampling process, such as retracting the cutting head 11 and raising the pressure plate after cutting.

[0054] During the cutting process, preferably, the cutting head 11 does not produce displacement in the X direction, but its movement trajectory along the Y axis remains parallel to the edge of the steel plate head identified by the vision detection module 73, so as to avoid situations such as slanted cutting caused by the steel plate deviating.

[0055] Furthermore, the above usage methods also include:

[0056] The sheet material is transported to the sheet material sampling device, so that both the first pallet 21 and the second pallet 22 are in the supporting position, and the sheet material is cut to complete the fixed-length cutting operation.

[0057] The outlet conveying unit 6 is equipped with a plate monitoring mechanism. Preferably, its end detection module 72 includes multiple sets of end detection elements. When the break tracking position passes, if all end detection elements are illuminated simultaneously, it is determined that the plate has been cut; otherwise, it is determined that the plate has not been cut, thus ensuring high accuracy. Preferably, the number of end detection elements is not less than three. Furthermore, if it is determined that the plate has not been cut, the plate break position is moved back below the cutting head 11, repositioned, and cut again.

[0058] Furthermore, the above usage methods also include:

[0059] Before cutting, the board is positioned. Specifically, the board is initially positioned using the main conveyor channel (inlet conveyor unit 5 and outlet conveyor unit 6), and then the cutting equipment 1 is precisely positioned by translating along the X direction. This two-stage positioning method ensures the positioning accuracy of the board.

[0060] Preferably, the sheet metal is conveyed via a main conveyor channel and a pallet assembly, delivering the target cutting position of the sheet metal to the area below the cutting equipment 1, and controlling the positioning error within the X-axis movable range of the cutting equipment 1. Furthermore, during the initial positioning process, the CNC system tracks the sheet metal position (e.g., the head position) in real time. After initial positioning, the cutting equipment 1 moves along the X-axis according to the actual position of the sheet metal for precise positioning.

[0061] Furthermore, the positioning process described above is explained as follows, based on the specific working conditions:

[0062] (1) Sheet material cutting to length / head sampling and cutting

[0063] When the end detection module 72 on the inlet side detects the position of the board head, the passive wheel in the length counting module 71 on the inlet side immediately presses down and rolls into contact with the board. At the same time, the length encoder in the length counting module 71 starts counting the length. When the board head reaches below the vision detection module 73 on the inlet side, the vision detection module 73 takes a picture of the board head and records the absolute value K of the length encoder at the moment of taking the picture. Using this as a reference, the actual position of the board head is determined based on the subsequent length counting value of the length encoder.

[0064] After the initial positioning of the board is completed, the CNC system adjusts the position of the cutting device 1 in the X direction according to the actual position of the tracked board head, so that the theoretical cutting position coincides with the actual cutting position of the cutting head 11.

[0065] After the visual inspection module 73 takes a picture of the board head, it can also identify the relative angle between the board head and the center line of the unit. When cutting, it can make corresponding angle compensation to ensure the right angle of the cut.

[0066] (2) Sampling and cutting of the tail end of the board

[0067] When the end detection module 72 on the exit side detects the head position of the board, the passive wheel in the length counting module 71 on the exit side immediately presses down and rolls into contact with the board. At the same time, the length encoder in the length counting module 71 starts counting the length. When the board head reaches below the vision detection module 73 on the exit side, the vision detection module 73 takes a picture of the board head and records the absolute value K of the length encoder at the moment of taking the picture. Using this as a reference, the actual position of the board head is determined based on the subsequent length count value of the length encoder. Then, based on the length of the board, the position of the tail of the board can be determined.

[0068] After the initial positioning of the board is completed, the CNC system adjusts the position of the cutting device 1 in the X direction according to the actual position of the tail of the board being tracked, so that the theoretical cutting position coincides with the actual cutting position of the cutting head 11.

[0069] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A plate sampling device, characterized in that: The device includes a sheet metal cutting unit and a pallet assembly. The sheet metal cutting unit includes a cutting device, which includes a cutting head. A sample collection area is provided below the pallet assembly. The pallet assembly includes a first pallet and a second pallet arranged sequentially along the sheet metal running direction. Both pallets are rotatably arranged below the sheet metal cutting unit. Each pallet is connected to a swing drive mechanism, thus each has a support position suitable for supporting the sheet metal and a clearance position relative to the support position. The swing direction of the first pallet is counterclockwise, and the swing direction of the second pallet is clockwise. The plate sampling device further includes an inlet conveying unit and an outlet conveying unit, which are located upstream and downstream of the pallet group, respectively. The inlet conveying unit and the outlet conveying unit are equipped with a plate monitoring mechanism, which includes a length counting module for measuring the length of the plate, an end detection module for detecting the end position of the plate, and a visual detection module. The plate sampling device also includes a numerical control system. The CNC system is used to perform the following positioning strategy on the sheet metal during fixed-length slitting or head sampling cutting: When the end detection module on the inlet side detects the head position of the sheet metal, the passive wheel in the length counting module on the inlet side immediately presses down and rolls into contact with the sheet metal. At the same time, the length encoder in the length counting module starts counting the length. When the sheet metal head reaches below the vision detection module on the inlet side, the vision detection module takes a picture of the sheet metal head and records the absolute value K of the length encoder at the moment of taking the picture. This is used as a reference, and the actual position of the sheet metal head is determined based on the subsequent length counting value of the length encoder. After the initial positioning of the sheet metal is completed, the CNC system adjusts the position of the cutting equipment in the X direction according to the tracked actual position of the sheet metal head so that the theoretical cutting position coincides with the actual cutting position of the cutting head. The CNC system is also used to perform the following positioning strategy on the board during sampling and cutting at the tail end: When the end detection module on the exit side detects the head position of the board, the passive wheel in the length counting module on the exit side immediately presses down and rolls into contact with the board. At the same time, the length encoder in the length counting module starts counting the length. When the board head reaches below the vision detection module on the exit side, the vision detection module takes a picture of the board head and records the absolute value K of the length encoder at the moment of taking the picture. This is used as a reference. Based on the subsequent length counting value of the length encoder, the actual position of the board head is determined. Then, based on the length of the board, the position of the tail end of the board can be determined. After the initial positioning of the board is completed, the CNC system adjusts the position of the cutting equipment in the X direction according to the tracked actual position of the tail end of the board, so that the theoretical cutting position coincides with the actual cutting position of the cutting head.

2. The plate sampling device as described in claim 1, characterized in that: The plate cutting unit is located between the first pallet and the second pallet.

3. The plate sampling device as described in claim 2, characterized in that: The plate cutting unit further includes a horizontal drive mechanism for driving the cutting device to move in a horizontal plane; the pallet group further includes a follow-up drive mechanism for driving the two pallets to move in the X direction relative to the cutting device.

4. The plate sampling device as described in claim 1, characterized in that: The first pallet and / or the second pallet adopt a belt-driven pulley structure.

5. The plate sampling device as described in claim 1, characterized in that: A sample collection trough is provided in the sample collection area.

6. The plate sampling device as described in claim 5, characterized in that: The sample collection area is also equipped with a sample delivery track, and the sample collection trough is movably mounted on the sample delivery track.

7. The method of using the plate sampling device as described in any one of claims 1 to 6, characterized in that, include: When it is necessary to sample the head of the board, both the first pallet and the second pallet are in the supporting position, and the board is cut. After the head of the board is sampled and cut, the second pallet is lowered so that the sample falls into the sample collection area below. When it is necessary to take a sample from the tail of the board, both the first pallet and the second pallet are in the support position, and the board is cut. After the sample is taken and cut at the tail of the board, the first pallet is lowered so that the sample falls into the sample collection area below. When it is necessary to cut the board to a fixed length, the board is transported to the board sampling device so that both the first pallet and the second pallet are in the supporting position, and the board is cut to a fixed length. The method of use also includes: Before cutting, the sheet material is positioned. Initial positioning is achieved using an inlet conveying unit and an outlet conveying unit, followed by precise positioning by translating the cutting equipment in the sheet material cutting unit along the X-axis. Specifically: When cutting sheet metal to length or sampling from the head, the sheet metal positioning process includes: when the end detection module on the inlet side detects the position of the sheet metal head, the passive wheel in the length counting module on the inlet side immediately presses down and rolls into contact with the sheet metal. At the same time, the length encoder in the length counting module starts counting the length. When the sheet metal head reaches below the vision detection module on the inlet side, the vision detection module takes a picture of the sheet metal head and records the absolute value K of the length encoder at the moment of taking the picture. This is used as a reference, and the actual position of the sheet metal head is determined based on the subsequent length counting value of the length encoder. After the initial positioning of the sheet metal is completed, the CNC system adjusts the position of the cutting equipment in the X direction according to the tracked actual position of the sheet metal head, so that the theoretical cutting position coincides with the actual cutting position of the cutting head. When sampling and cutting the tail of the sheet metal, the sheet metal positioning includes: when the end detection module on the exit side detects the head position of the sheet metal, the passive wheel in the length counting module on the exit side immediately presses down and rolls into contact with the sheet metal. At the same time, the length encoder in the length counting module starts counting the length. When the head of the sheet metal reaches below the vision detection module on the exit side, the vision detection module takes a picture of the head of the sheet metal and records the absolute value K of the length encoder at the moment of taking the picture. This is used as a reference. Based on the subsequent length counting value of the length encoder, the actual position of the head of the sheet metal is determined. Then, based on the length of the sheet metal, the position of the tail of the sheet metal can be determined. After the initial positioning of the sheet metal is completed, the CNC system adjusts the position of the cutting equipment in the X direction according to the tracked actual position of the tail of the sheet metal, so that the theoretical cutting position coincides with the actual cutting position of the cutting head.

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