A variable gauge laser blanking line

Abstract

The utility model discloses a kind of variable-gauge plate laser blanking line, including central control system, and sequentially arranged flattener, feeder and thickness measuring device, the blanking line further includes laser cutting device, length measuring device;The feeder, thickness measuring device, laser cutting device and length measuring device are all with the central control system communication, the length measuring device is located on the feeder, the laser cutting device is located at the discharge port side of the thickness measuring device;The laser cutting device includes at least one laser cutting head.The laser blanking line can obtain special-shaped part meeting standard by once processing of variable-gauge plate, avoids the waste of material;It also avoids separate detection to sheared part, improves production efficiency;And the blanking line can process mirror image variable-gauge plate without switching production line, so that the diversity of product produced by the blanking line of the application is improved, greatly reduces investment cost, and reduces floor area.

Description

Technical Field

[0001] This utility model belongs to the field of mechanical processing equipment technology, and specifically relates to a laser blanking line for variable thickness plates. Background Technology

[0002] Variable-thickness rolled blanks (VRB) are cold-rolled steel sheets with varying thicknesses. During rolling, the roll gap is systematically varied and controlled in real-time, resulting in different thickness distributions along the longitudinal direction of the steel sheet. This technology enables flexible distribution of component properties, allowing automotive parts to meet performance requirements while minimizing weight. To meet the demands of the final finished parts, the VRB needs to be sheared or blanked according to the part dimensions.

[0003] To obtain parts with required shapes, especially irregularly shaped parts, traditional processing methods first use specialized shearing equipment, such as shearing machines, to process the original coiled strip of variable-thickness plate into trapezoidal or rectangular blanks, which are then stamped or laser-cut to obtain the irregularly shaped parts. Patent CN106270718A discloses an automatic shearing device for cold-rolled variable-thickness plates. This device uses a thickness gauge and length measuring device in front of the shears to cut blanks of the appropriate length for the parts. The cut blanks are then subjected to secondary processing to obtain the desired part shape. However, this secondary processing method results in significant material waste; it also requires repackaging and unpacking of the blanks, increasing storage costs and lengthening the processing flow, leading to low overall production efficiency. Furthermore, in traditional variable-thickness plate stamping and blanking lines, the fixed installation position of the stamping dies prevents the processing of mirror-image variable-thickness plates.

[0004] For example, patent CN109201843A also discloses an automatic blanking device for cold-rolled variable thickness plates, which includes a contour detection device. This device detects the variable thickness plate, and when it meets certain conditions, a press is used to stamp it. The control system then compares the actual contour information of the plate with the preset contour information to obtain the finished plate. However, this device only compares the thickness and length of the finished plate; therefore, the stamping only performs a shearing function and cannot process the plate's outline to obtain irregularly shaped parts. Furthermore, the stamping in this device can only produce finished plates with specific shapes, and the shape of the plate cannot be flexibly adjusted. Utility Model Content

[0005] To address the problem that existing technologies cannot process variable-thickness plates in a single operation to obtain irregularly shaped parts, this utility model provides the following technical solution:

[0006] A variable thickness plate laser blanking line includes a central control system and a leveling machine, a feeder, and a thickness measuring device arranged sequentially. The blanking line also includes a laser cutting device and a length measuring device. The feeder, thickness measuring device, laser cutting device, and length measuring device are all connected to the central control system. The length measuring device is mounted on the feeder, and the laser cutting device is located on the discharge port side of the thickness measuring device. The laser cutting device includes at least one laser cutting head.

[0007] Preferably, the central control system can analyze the data collected by the thickness measuring device to obtain the processing area of ​​the part to be processed on the variable thickness plate and the movement trajectory of the laser cutting head in the processing area, or obtain the action sequence and movement trajectory of multiple laser cutting heads; the central control system can control the feeder to make the processing area coincide with the cutting area of ​​the laser cutting device.

[0008] Preferably, the feeder includes a feeding drive device and multiple sets of clamping rollers connected to the feeding drive device; the length measuring device is located on the discharge port side of the clamping rollers; the length measuring device includes a measuring wheel and an encoder, the encoder being located on the measuring wheel.

[0009] Preferably, the thickness measuring device includes a thickness measuring bracket, and a thickness measuring roller and a sensing probe mounted on the thickness measuring bracket; both the material inlet end and the material outlet end of the thickness measuring device are provided with a set of the thickness measuring rollers, each set including two thickness measuring rollers, and the two thickness measuring rollers are arranged opposite each other in the vertical direction; the sensing probe is located between the two sets of thickness measuring rollers, and at least two sensing probes are provided, with at least one sensing probe provided on the upper and lower sides of the variable thickness plate.

[0010] Preferably, the laser blanking line further includes a looper device disposed between the leveling machine and the feeder; the looper device includes a looper swing bridge and a buffer looper; the buffer looper is disposed below the looper swing bridge.

[0011] Preferably, the loose swing bridge is provided at both the discharge end of the leveling machine and the feed end of the feeder, and the buffer loose sleeve is located in the middle of the two loose swing bridges; the loose swing bridge includes a swing bridge support, a swing bridge drive device provided in the swing bridge support, and a swing bridge rod and a swing bridge frame hinged to the swing bridge support; the swing bridge drive device is connected to the swing bridge frame, the swing bridge rod is provided on the swing bridge frame and moves with the movement of the swing bridge frame.

[0012] Preferably, the laser blanking line further includes an uncoiling device, a material head shear, and a laser marking device; the laser marking device communicates with the central control system and is located at the discharge port of the laser cutting device; the central control system controls the laser marking device to assign identification marks to the cut parts obtained after laser cutting.

[0013] Preferably, the laser blanking line further includes a sorting device located after the laser marking device. The sorting device includes at least one set of palletizing devices. The palletizing devices include a palletizing robot and a palletizing cart. The palletizing robot identifies the identification mark to classify the cut parts.

[0014] Preferably, the central control system includes a communicable receiving module, a storage module, an analysis module, and an output module; the receiving module receives data including that obtained by the thickness measuring device and the length measuring device; the output module outputs data to the feeder and the laser cutting device; the analysis module analyzes and compares the signals received by the receiving module to output control signals.

[0015] Preferably, the storage module is used to store information, including the thickness information and length information of the variable-thickness plate obtained in each fixed sampling interval, as well as a predefined template of the part to be processed, wherein the predefined template includes the material standard thickness profile features and tolerance information.

[0016] This utility model has the following beneficial effects: The variable-thickness plate laser blanking line described in this application can complete the uncoiling, leveling, cutting, inspection, and sorting processes of variable-thickness plate rolls in one operation. Specifically, by setting up online thickness measurement, the thickness change of the variable-thickness plate can be monitored in real time. After analyzing the real-time thickness data, the central control system outputs corresponding control signals to control the laser cutting device to cut the variable-thickness plate material, thereby obtaining the cut parts. Simultaneously, the central control system can also classify and mark the cut parts using a laser marking device, and then the palletizing robot automatically completes the unloading and defective product rejection processes. Compared with the traditional method of shearing first, then cutting or stamping, the laser blanking line of this application increases the utilization rate of variable-thickness plate materials by 10-15% under the same production capacity. Furthermore, the laser cutting method not only combines part efficiency and product diversity but also significantly reduces investment costs and reduces the floor space by 40%. The design of the central control system for the blanking line also reduces personnel costs by 80%, lowers the risk of workplace injuries, and improves economic efficiency. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the laser blanking line for the variable thickness plate described in this utility model;

[0018] Figure 2 This is a schematic diagram of the feeder structure in the laser blanking line;

[0019] Figure 3 This is a schematic diagram of the thickness measuring device in the laser blanking line;

[0020] Figure 4 for Figure 3 Enlarged view of point A in the middle;

[0021] Figure 5 This is a schematic diagram of the looper device in the laser blanking line;

[0022] Figure 6 This is a schematic diagram of the laser marking device and sorting device in the laser feeding line.

[0023] Figure 7 This is a schematic diagram of the processing flow of the variable thickness plate laser blanking line described in the utility model. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model. Example 1:

[0025] A variable thickness plate laser blanking line, such as Figure 1 As shown, it includes a central control system and a leveling machine 1 and a feeding machine 2 arranged sequentially. The blanking line also includes a laser cutting device 3, a length measuring device 4, and a thickness measuring device 5. The length measuring device 4 and the thickness measuring device 5 are located between the feeding machine 2 and the laser cutting device 3. The length measuring device 4 is used to collect the feeding length of the variable thickness plate (hereinafter referred to as material) to ensure the length of the part. The thickness measuring device 5 is used to collect the thickness of the material in real time to ensure that the thickness range of the part meets the requirements. The length measuring device 4, the thickness measuring device 5, the laser cutting device 3, and the feeding machine 2 all communicate with the central control system.

[0026] Specifically, such as Figure 1As shown, the leveling machine 1 is used to straighten the material, ensuring its parallelism and thus the precision of laser cutting. The feeder 2 is used to transport the straightened material, allowing it to move forward or backward. The feeder 2 includes multiple sets of clamping rollers 21 and a feeding drive device; the feeding drive device includes a power unit and a gearbox, and the multiple sets of clamping rollers 21 are connected to the power unit through the gearbox; each set of clamping rollers 21 includes upper and lower clamping rollers 21, which clamp the material, and the feeding drive device drives the clamping rollers 21 to rotate, thereby transporting the material; the power unit is preferably a servo motor.

[0027] The laser cutting device 3 includes at least one laser cutting head 31, which is used to laser cut materials to obtain the desired irregular-shaped parts. The processing trajectory of the laser cutting head 31 and the processing sequence of multiple laser cutting heads 31 are controlled by a central control system.

[0028] The central control system can analyze the data collected by the thickness measuring device 5 to obtain the processing area of ​​the part to be processed on the material and the movement trajectory of the laser cutting head 31 in the processing area. Furthermore, when multiple laser cutting heads 31 are required for cutting, the system can also allocate the action sequence of the multiple laser cutting heads 31. The central control system controls the feeder to ensure that the processing area of ​​the variable thickness plate coincides with the cutting area of ​​the laser cutting device.

[0029] The length measuring device 4 is mounted on the feeder 2. Specifically, as shown... Figure 2 As shown, the length measuring device 4 is located at the material outlet end of the pinch roller 21. It includes a set of measuring wheels 41, on which an encoder is mounted. The encoder is used to detect the length of the material passing through the measuring wheels 41, i.e., to measure the feeding length. The measuring wheels 41 press against the moving material, and are passively rotated by the movement of the material, thereby achieving the measurement purpose.

[0030] The thickness measuring device 5 collects the thickness of the fed material in real time according to a fixed sampling interval. Specifically, as shown in the figure... Figures 3-4 As shown, the thickness measuring device 5 includes a thickness measuring roller 51, a sensing probe 52, and a thickness measuring bracket 53. The thickness measuring bracket 53 is used to mount the thickness measuring roller 51 and the sensing probe 52; the thickness measuring roller 51 is used to eliminate vibrations generated during material transportation to ensure the accuracy of thickness measurement; the sensing probe 52 is used to collect the thickness of the material in real time.

[0031] The thickness measuring device 5 has a set of thickness measuring rollers 51 at both the material inlet and outlet ends; the thickness measuring rollers 51 are arranged in pairs facing each other. A sensing probe 52 is positioned between the two sets of thickness measuring rollers 51, and at least two sensing probes 52 are provided, with at least one on each of the upper and lower sides of the material. When the material enters the thickness measuring device 5 through the material inlet end, as the material continues to be input, it is pressed down by the two sets of thickness measuring rollers 51 at the material inlet and outlet ends respectively. Simultaneously, the two sensing probes 52 positioned on the upper and lower sides of the material collect the thickness of the material in real time. By setting the thickness measuring rollers 51 and positioning the sensing probes 52 between the two sets of thickness measuring rollers 51, changes in the feeding speed do not affect the thickness measuring device 5's ability to collect material thickness data, thus improving the accuracy of material thickness measurement. Preferably, the sensing probes 52 are dual-probe spectral confocal sensors.

[0032] During operation, after the material is leveled by the leveling machine 1, the servo motor in the feeder 2 is activated, driving the rotating roller 21 to rotate, thus moving the material forward. After the material is stably conveyed, the encoder in the length measuring device 5 records the initial feeding length of the material and transmits it to the central control system. Under the continuous feeding of the feeder 2, the material enters the thickness measuring device 4, where it is pressed down by the thickness measuring roller 51 to eliminate material vibration. Then, the sensing probe 52 collects the thickness of the material in real time and transmits the thickness information to the central control system. The central control system judges the input information of the length measuring device 5. When a fixed sampling interval (this application) is completed... After the material thickness (the sampling interval can be set to 1~20 meters) is determined, the central control system controls the feeder 2 to stop feeding. The central control system analyzes the collected material thickness to determine the area to be cut on the material and the processing area on the material. At the same time, it formulates the cutting trajectory of the laser cutting head 31 and, when multi-head cutting is required, formulates the action sequence of multiple laser cutting heads 31. After the analysis is completed, the central control system controls the feeder 2 to make the material processing area coincide with the laser cutting area. Then, the laser cutting device 3 performs laser cutting on the material according to the control of the central control system to obtain irregularly shaped parts.

[0033] By employing the aforementioned laser blanking line, the processing of variable-thickness plates eliminates the need for secondary processing methods such as shearing followed by stamping or cutting, enabling the production of standard-compliant irregularly shaped parts and avoiding material waste. Furthermore, compared to traditional methods of manufacturing irregularly shaped parts, it eliminates the need for separate inspection of sheared parts, improving production efficiency. The ability to process mirror-image variable-thickness plates without switching production lines increases the product diversity of this blanking line, significantly reducing investment costs and floor space requirements. Example 2:

[0034] The difference between this embodiment and embodiment 1 is that, Figure 5 As shown, the laser blanking line also includes a looper device 6, which is located between the leveling machine 1 and the feeder 2. The looper device 6 is used to buffer and guide the material, ensuring stable material transport and continuous laser blanking line processing.

[0035] The looper device 6 includes a looper swing bridge 61 and a buffer looper 62. The looper swing bridge 61 includes two, which are arranged opposite to each other at the discharge end of the leveler 1 and the feed end of the feeder 2; the buffer looper 62 is arranged directly below the two looper swing bridges to form a buffer zone for the material, so as to balance the speed difference between the leveler 1 and the feeder 3.

[0036] Furthermore, the movable swing bridge 61 is used for guiding materials, and includes a swing bridge support 68, a swing bridge rod 63 and a swing bracket 64 hinged to the swing bridge support 68. The swing bridge support 68 is equipped with a swing bridge drive device, which cooperates with the swing bridge bracket 64, allowing the swing bridge bracket 64 to rotate around the hinge point, thereby controlling the lifting and lowering of the swing bridge bracket 64. The swing bridge rod 63 is located above the swing bridge bracket 64 and moves with the movement of the swing bridge bracket 64. The swing bridge rod 63 is equipped with multiple rubber-coated bearings 67 to support the material passing through the movable swing bridge 611, while reducing the friction between the material and the swing bridge rod 63.

[0037] The buffer loop 62 is used to buffer the material, and it includes a frame 65 and a loop plate 66. The loop plate 66 is located inside the frame 65 and is also provided with pulleys to reduce the friction between the material and the surface of the buffer loop 62 during transportation.

[0038] During the feeding phase (i.e., when the material head passes through), the swing bridge drive device raises the swing bridge bracket 64 to a horizontal position, allowing the material to be fed in. When the material drop line is running, the swing bridge drive device lowers the swing bridge bracket 64 to an inclined position, at which point a portion of the material falls into the buffer loop 62, forming an arc-shaped buffer zone within the loop. This embodiment avoids material blockage or insufficient supply caused by speed differences between the leveler 1 and the feeder 3 by setting the loop device 6 between them; it also provides space for releasing internal stress in the material; simultaneously, by setting the loop swing bridge 61, it can correct the feeding offset problem caused by the original material roll not being on the centerline when it is in a tower-shaped or staggered configuration. Example 3:

[0039] The difference between this embodiment and embodiment 1 or 2 is that, Figure 1 and Figure 6As shown, the laser cutting line also includes an uncoiling device, a head shear, a first conveyor 32, a laser marking device 9, and a sorting device 10; the head shear is located between the uncoiling device and the leveling machine 1, the laser marking device 9 is located at the outlet of the laser cutting device 3, and the sorting device 10 is located at the outlet of the laser marking device 9.

[0040] Specifically, such as Figure 1 As shown, the first conveyor 32 is disposed in the laser cutting device 3, and the laser cutting head 31 is disposed on both sides of the first conveyor 32; the material is placed on the first conveyor 32; the first conveyor 32 is used to transport the cut parts so that they can reach the next processing position. Preferably, the first conveyor 32 is a chain conveyor.

[0041] The uncoiling device is used to uncoil materials and includes an uncoiler and an auxiliary support frame. The auxiliary support frame helps to fix the coiled material on the uncoiler, which is used to uncoil the coiled material. The material head shear is used to cut the material head.

[0042] The laser marking device 9 assigns identification marks to the cut parts obtained by laser cutting, assigns codes to qualified parts, and assigns NG marks to unqualified parts.

[0043] The sorting device 10 includes a second conveyor 101 and at least one set of palletizing devices 102. The second conveyor 101 is located after the laser marking device 9, and the palletizing devices 102 are located on both sides of the belt conveyor 101. After being marked with identification tags, the cut parts are conveyed onto the second conveyor 101, and the palletizing devices 102 identify the identification tags on the cut parts on the second conveyor 101. The second conveyor 101 is preferably a belt conveyor.

[0044] The palletizing device 102 includes a palletizing robot 103 and a palletizing cart 104. The palletizing robot 103 identifies the identification marks on the cut parts and places the qualified parts with the assigned codes onto the palletizing cart 104. Unqualified parts with NG marks are output by the belt conveyor 101 and flow out of the waste discharge line with the waste material.

[0045] The above technical solution improves the automation of the material feeding line in this application, enabling automatic material feeding and automatic rejection of defective products, reducing labor costs, lowering the risk of workplace injuries, and thus improving economic efficiency. Example 4:

[0046] The difference between this embodiment and embodiments 1, 2, or 3 is that the material feeding line also includes a central control system. The feeder 2, laser cutting device 3, thickness measuring device 5, length measuring device 4, and laser marking device 9 all communicate with the central control system. This allows the central control system to control the feeding of the feeder, the processing trajectory of the laser cutting head 31, and the processing sequence of the multiple laser cutting heads 31. Furthermore, this setup enables real-time online monitoring of material thickness, automated cutting, and automated sorting of cut parts.

[0047] The central control system includes a communicable receiving module, a storage module, an analysis module, and an output module. These modules store data on the material input length and thickness variation range, and analyze the data to formulate control signals. These control signals include the movement trajectory of the laser cutting head 31. In multi-head processing, the central control system can also allocate tasks to multiple laser heads 31. The control signals are output to the laser cutting device 3, which then drives the laser cutting head 31 to begin laser processing. After completing the acquisition of thickness data at a fixed sampling interval, the central control system analyzes the data using the analysis module, at which point the material is stationary.

[0048] The receiving module receives data from the length measuring device 4 and the thickness measuring device 5. The storage module includes a predefined template containing material standard thickness contour feature information and tolerance information. The analysis module performs judgment and analysis on the content that needs to be compared and / or analyzed in the blanking line. This includes comparing the received real-time material thickness features with the predefined template to calculate the processing area of ​​the irregular contour of the part to be processed on the material, thereby generating a control signal. The output module transmits the control signal output by the analysis module to relevant devices to control the laser processing trajectory and / or automatically generate multi-laser head task allocation, etc.

[0049] The control signals include laser processing trajectory and / or automatically generated multi-laser head task allocation signals. The control signals also include a mechanism to control the movement state of the feeder 2's clamping roller 21. Through these control signals, the area of ​​material to be cut can be aligned with the effective cutting stroke range of the laser cutting device. Before laser processing begins, the output module sends a control signal to the feeder 2, causing it to perform an auxiliary feeding action. Specifically, based on the received control signal, the feeder 2 drives the clamping roller 21 to rotate forward or backward using a feeding drive device, bringing the processing position on the material to the cutting position. Here, the control signal represents the position of the length range of the material to be processed in the spatial coordinate system.

[0050] The control signal also includes a control signal that controls the laser marking device 9 to assign codes or mark the cut parts. Specifically, after laser cutting is completed, during the process of conveying the cut material to the laser marking device 9, the analysis module in the central control system compares the pre-stored shape information of the parts to determine whether the parts are qualified, and converts the judgment result into a control signal that controls the laser marking device 9 to mark or fail to meet the standard, which is then sent to the output module, thereby controlling the laser marking device 9 to dynamically track and mark the parts.

[0051] The central control system forms a communication network with relevant devices in the laser blanking line via a local area network or I / O connection. The thickness measuring device 5 detects material thickness data in real time, and the central control system records and saves this thickness data. The central control system can also save production log data for later information traceability.

[0052] The workflow of the laser blanking line in this application is as follows: Figure 7 As shown:

[0053] S1: The laser blanking line is turned on, the central control system is started, the measurement parameters and the configuration of the actual functions are checked, and the target part parameters are manually selected and configured from the storage module to generate a predefined template.

[0054] S2: The central control system performs data calibration on the relevant equipment that communicates with it;

[0055] S3: The feeder 2 operates, feeding in materials ranging from 1 to 20 meters in length in sequence. The length of the material is measured by the length measuring device 4, and the thickness information, such as the geometry of the thickness, is collected in real time by the thickness measuring device 5, transmitted to the receiving module, and saved.

[0056] S4: After feeding is completed, the feeder 2 stops running; the analysis module compares the predefined template with the thickness information stored in the receiving module to infer the processing area of ​​the irregular contour of the part to be processed on the conveying material; and generates the cutting position, laser processing trajectory and / or generates the task sequence of multiple laser cutting heads 31 for each irregular contour; and outputs the above results to the output module.

[0057] S5: The output module conveys the material processing position to the feeder, starts the feeder to perform an auxiliary feeding, so that the area of ​​the material to be cut coincides with the effective cutting stroke range of the laser cutting device;

[0058] S6: The feeder stops feeding; the output module outputs the motion data of the laser cutting head 31 to the laser cutting device 3, and the laser cutting device 3 cuts at the position to be cut of the material, thereby obtaining irregularly shaped parts with different thickness curves;

[0059] S7: Assigning identification marks to the cut parts: After cutting is completed, the first conveyor 32 is started to transport the cut parts to the sorting device 10. During this transportation process, the analysis module in the central control system judges the shape of the cut parts and sends the control signal generated by the analysis to the output module. The output module then sends the control signal to the laser marking device 9 to control the laser marking device 9 to mark the cut parts to obtain marked parts. If the central control system judges the parts to be qualified, the laser marking device 9 assigns an identification code mark to the parts. If it judges them to be unqualified, the laser marking device 9 assigns an NG mark to the cut parts.

[0060] S9: The coded parts transported to the sorting device 10 are sorted; the second conveyor 101 is started to make the coded parts continue to move on the unloading line, and at the same time the palletizing device is started to sort the coded parts: the palletizing robot 103 sorts the coded parts: the coded parts are picked up by the palletizing robot 103 and placed on the palletizing car 104 to obtain finished parts; the coded parts with NG marks continue to move with the second conveyor 101 and flow out of the production line, becoming waste.

[0061] The design of the central control system further improves the automation level of the blanking line of this application, enabling the blanking line of this application to automatically complete the cutting of irregular parts.

[0062] It should be noted that the technical features in embodiments 1 to 4 above can be combined arbitrarily, and the resulting technical solutions all fall within the protection scope of this application. Furthermore, in this document, terms such as "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0063] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A laser blanking line for variable gauge sheet metal, comprising a central control system, and, in sequence, a leveller, a feeder and a gauge measuring device, characterised in that, The material feeding line also includes a laser cutting device and a length measuring device; the feeder, thickness measuring device, laser cutting device and length measuring device are all in communication with the central control system; the length measuring device is located on the feeder; the laser cutting device is located on the discharge port side of the thickness measuring device; the laser cutting device includes at least one laser cutting head.

2. The laser blanking line as described in claim 1, characterized in that, The central control system can analyze the data collected by the thickness measuring device to obtain the processing area of ​​the part to be processed on the variable thickness plate and the movement trajectory of the laser cutting head in the processing area, or obtain the action sequence and movement trajectory of multiple laser cutting heads; the central control system can control the feeder to make the processing area coincide with the cutting area of ​​the laser cutting device.

3. The laser blanking line as described in claim 2, characterized in that, The feeder includes a feeding drive device and multiple sets of clamping rollers connected to the feeding drive device; the length measuring device is located on the discharge port side of the clamping rollers; the length measuring device includes a measuring wheel and an encoder, with the encoder located on the measuring wheel.

4. The laser blanking line as described in claim 2, characterized in that, The thickness measuring device includes a thickness measuring bracket, and a thickness measuring pressure roller and a sensing probe installed on the thickness measuring bracket. The material inlet end and the material outlet end of the thickness measuring device are each provided with a set of the thickness measuring pressure rollers. Each set includes two thickness measuring pressure rollers, and the two thickness measuring pressure rollers are arranged opposite each other in the vertical direction. The sensing probe is located between the two sets of thickness measuring pressure rollers. There are at least two sensing probes, and at least one sensing probe is provided on the upper and lower sides of the variable thickness plate.

5. The laser blanking line as described in claim 2, characterized in that, The laser blanking line also includes a looper device located between the leveling machine and the feeding machine; the looper device includes a looper swing bridge and a buffer looper; the buffer looper is located below the looper swing bridge.

6. The laser blanking line as described in claim 5, characterized in that, Both the discharge end of the leveling machine and the feed end of the feeder are provided with the loose swing bridge, and the buffer loose sleeve is located in the middle of the two loose swing bridges; the loose swing bridge includes a swing bridge support, a swing bridge drive device located in the swing bridge support, and a swing bridge rod and a swing bridge frame hinged to the swing bridge support; the swing bridge drive device is connected to the swing bridge frame, and the swing bridge rod is located on the swing bridge frame and moves with the movement of the swing bridge frame.

7. The laser blanking line as described in claim 2, characterized in that, The laser blanking line also includes an uncoiling device, a material head shear, and a laser marking device; the laser marking device communicates with the central control system and is located at the discharge port of the laser cutting device; the central control system controls the laser marking device to assign identification marks to the cut parts obtained after laser cutting.

8. The laser blanking line as described in claim 7, characterized in that, The laser blanking line also includes a sorting device located after the laser marking device. The sorting device includes at least one set of palletizing devices. The palletizing devices include a palletizing robot and a palletizing cart. The palletizing robot identifies the identification marks to classify the cut parts.

9. The laser blanking line as described in any one of claims 1 to 8, characterized in that, The central control system includes a communicable receiving module, a storage module, an analysis module, and an output module; the receiving module receives data including that obtained by the thickness measuring device and the length measuring device; the output module outputs data to the feeder and the laser cutting device; the analysis module analyzes and compares the signals received by the receiving module to output control signals.

10. The laser blanking line as described in claim 9, characterized in that, The storage module is used to store information, including the thickness and length information of the variable-thickness plate obtained at each fixed sampling interval, as well as a predefined template of the part to be processed. The predefined template includes the material standard thickness profile features and tolerance information.

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