A laser cutting blanking device for metal mold material processing

Abstract

The application discloses a kind of laser cutting blanking device for metal mold material processing, belong to metal mold material laser cutting field, including laser cutting machine main body, laser cutting machine main body is equipped with forecast and try to support control module, forecast and try to support control module includes controller, cutting head position detection unit, lifting displacement detection unit, drive load detection unit and workpiece state detection unit, controller is used to read cutting path and control laser cutting instrument, first linear motor, second linear motor and belt conveyor;Cutting head position detection unit is used to obtain the real-time position of laser cutting instrument;Lifting displacement detection unit is used to detect the overall lifting displacement of second connecting plate;Solve the problem of workpiece tipping, waste skeleton warping, drive overload and mechanism jamming caused by directly lifting when workpiece still has residual connection, edge jam or mechanical blocking after cutting is completed.

Description

Technical Field

[0001] This invention relates to the field of laser cutting of metal molds, and more specifically, to a laser cutting blanking device for processing metal molds. Background Technology

[0002] With the continuous growth in demand for processing metal sheets, metal molds, and irregularly shaped metal components, laser cutting has been widely applied in machinery manufacturing, mold processing, automotive parts, and metal product manufacturing due to its advantages such as high processing precision, fast cutting speed, small heat-affected zone, and adaptability to complex contours. Existing laser cutting equipment typically processes the contours of metal molds according to pre-generated layout diagrams and cutting paths. The metal mold to be processed is generally placed on a cutting worktable formed by multiple spaced supports, with slag removal spaces reserved between adjacent supports to allow molten slag and debris generated during cutting to be discharged downwards. After cutting, the finished workpiece and remaining waste are removed from the cutting area by manual handling, hoisting equipment, or conventional conveying mechanisms.

[0003] In actual processing, multiple metal workpieces of different sizes, shapes, and weights are often arranged on the same metal mold. For workpieces with small contour dimensions, centers of gravity close to the support gaps, or edges spanning between adjacent supports, the original support relationship changes when the closed contour is completely cut. The workpiece may fall downwards, tilt, flip, or get stuck in the support gaps. Existing cutting control programs mainly focus on the laser cutting head completing contour processing according to a predetermined path. They typically do not pre-judge the risk of workpiece falling based on the workpiece contour, layout position, cutting sequence, and support relationship, nor do they coordinate the unloading mechanism to enter the receiving state before the workpiece is finally separated. Therefore, small-sized workpieces often shift before the unloading mechanism moves, which may cause surface damage or allow the workpiece to enter the equipment, increasing the difficulty of subsequent cleaning and removal.

[0004] On the other hand, the completion of the cutting path does not necessarily mean that the workpiece has been completely separated from the surrounding waste. Affected by factors such as variations in sheet thickness, fluctuations in cutting parameters, slag adhesion, thermal deformation, and incomplete cutting in certain areas, the workpiece edge may still have residual connections with the waste skeleton, or it may become stuck with the worktable support after sinking. Current unloading methods typically lift or transport the workpiece directly after receiving the cutting completion signal, lacking a process of trial lifting at a low speed before formal unloading, and using lifting displacement, drive load, and workpiece motion response to determine the actual separation state. When the workpiece has residual connections, edge jamming, or mechanical obstruction, continued forced lifting can easily lead to workpiece tipping, waste skeleton lifting, overloading of the conveying mechanism, or jamming of the lifting mechanism.

[0005] Furthermore, existing control methods often resort to machine shutdown and manual inspection after a lifting anomaly occurs. This lacks a closed-loop control mechanism that performs actions such as descent, supplementary cutting, unblocking, and re-trial lifting based on the anomaly type, resulting in poor material feeding continuity and prolonged equipment downtime. Therefore, a method is needed that can predict the risk of separation of small workpieces by incorporating metal mold processing data, implement pre-welding before final cutting, and identify workpiece separation and lifting status through overall trial lifting. This will improve the stability, safety, and automation of small workpiece feeding. Summary of the Invention

[0006] The technical problem this invention aims to solve is: addressing the issue that existing laser cutting processes cannot predict the separation risk of small-sized workpieces by considering the closed cutting contour, cutting sequence, and support relationship between the workpiece and the support structure, leading to workpieces easily falling, flipping, or getting stuck in support gaps after final cutting. This invention provides a laser cutting device for metal mold processing. Simultaneously, it solves the problems of workpiece tipping, scrap skeleton lifting, drive overload, and mechanism jamming caused by directly lifting workpieces with residual connections, edge jamming, or mechanical obstructions after cutting. It achieves predictive acceptance before final separation, separation confirmation, overall trial lifting, lifting status identification, and re-trial lifting after abnormal release, improving the continuity, stability, and safety of metal workpiece cutting.

[0007] To solve the above problems, the present invention adopts the following technical solution.

[0008] A laser cutting blanking device for metal mold processing includes a laser cutting machine body, a U-shaped frame, a laser cutter vertically mounted in the middle of the U-shaped frame, and multiple first triangular support platforms longitudinally and equidistantly installed in the cutting area of ​​the laser cutting machine body. The laser cutting machine body is equipped with a predictive acceptance and trial support control module, which includes a controller, a cutting head position detection unit, a lifting displacement detection unit, a drive load detection unit, and a workpiece status detection unit. A support plate is installed on the top surface of the discharge end of the laser cutting machine body. The support plate has an L-shaped structure and its horizontal end is flush with the top surface of the laser cutting machine body. A laser sensor for detecting the discharge of the cut material is installed on the horizontal end of the support plate. An adaptation and transportation component for transporting materials and adapting to smaller materials is installed inside the laser cutting machine body.

[0009] As a further technical solution of the present invention, the adaptive transportation component includes a plurality of second triangular support platforms equidistantly disposed between two first triangular support platforms on the same side, and a first connecting plate is longitudinally installed at the front and rear ends of the bottom of the plurality of second triangular support platforms.

[0010] As a further technical solution of the present invention, a first fixing plate is installed on both sides of the two first connecting plates. The first fixing plate has an L-shaped structure, and the two first fixing plates on the same side are vertically provided with a first linear motor fixed to the inner wall of the laser cutting machine body at their far ends. The two first fixing plates on the same side are connected to the corresponding first linear motor output plate at their far ends.

[0011] As a further technical solution of the present invention, a transport area is provided between the plurality of second triangular support platforms and the first triangular support platform.

[0012] As a further technical solution of the present invention, belt conveyor devices are longitudinally installed in multiple transport areas, and a U-shaped support frame is installed on the bottom surface of the belt conveyor devices.

[0013] As a further technical solution of the present invention, a second connecting plate is longitudinally installed at the front and rear ends of the bottom of the plurality of support frames.

[0014] As a further technical solution of the present invention, a second fixing plate is installed on both sides of the two second connecting plates. The second fixing plate has an L-shaped structure, and the far ends of the two second fixing plates on the same side are vertically provided with a second linear motor fixed to the inner wall of the laser cutting machine body.

[0015] As a further technical solution of the present invention, the controller is used to read the cutting path and control the laser cutter, the first linear motor, the second linear motor and the belt conveyor. The cutting head position detection unit is used to obtain the real-time position of the laser cutter; The lifting displacement detection unit is used to detect the overall lifting displacement of the second connecting plate. The drive load detection unit is used to collect the drive current of the second linear motor; The workpiece status detection unit is used to detect the height changes and relative positions of the metal workpiece and the scrap skeleton.

[0016] As a further technical solution of the present invention, the cutting analysis steps of the predicted acceptance and trial support control module are as follows: S1. The controller acquires metal mold processing data including metal mold outline data, layout data and cutting path data, identifies the metal workpiece formed after cutting according to the cutting path data, and extracts the closed cutting outline and cutting sequence corresponding to each metal workpiece; and determines the small-sized workpieces that are prone to falling and the corresponding jamming risk positions according to the support relationship between the metal workpiece and the first triangular support platform and the second triangular support platform. S2. The controller determines the final separation cutting segment based on the closed cutting contour and cutting sequence corresponding to the small workpiece that is prone to falling, and determines the safe lifting time and pre-acceptance height in combination with the position of the final separation cutting segment, the operating status of the laser cutter and the lifting status of the belt conveyor. S3. Based on the safe rising timing and pre-acceptance height, the controller coordinates and controls the laser cutter and the belt conveyor to perform the pre-acceptance operation, so that the belt conveyor rises to the pre-acceptance height as a whole before the final separation and cutting section is executed; controls the laser cutter to execute the final separation and cutting section, and determines the separation result based on the state changes of the easily falling small-sized workpiece and the adjacent waste skeleton; S4. The controller controls the laser cutter to perform separation correction or controls the belt conveyor to perform overall trial lifting based on the separation result, obtains the device operation status and metal workpiece response status during the trial lifting process, and determines the lifting status based on the device operation status and metal workpiece response status. S5. The controller controls the belt conveyor to perform overall conveying or abnormal release according to the lifting status, and re-executes the trial lifting identification after the abnormality is resolved.

[0017] As a further technical solution of the present invention, determining the final separation and cutting segment, the safe lifting timing, and the pre-support height in S2 includes: The closed cutting contour corresponding to the small workpiece that is easy to fall is divided into multiple continuous cutting segments. According to the projection position relationship between each continuous cutting segment and the belt conveyor device at the pre-bearing height, the continuous cutting segment that avoids the projection area of ​​the belt conveyor device is selected as the final separation cutting segment. The cutting sequence is adjusted so that the final separation cutting segment is executed after the other continuous cutting segments of the corresponding closed cutting contour are completed. Based on the remaining running time required for the laser cutter to move from its current position to the starting position of the final separation and cutting section, and the rising time required for the belt conveyor to rise from its current height to the pre-acceptance height, and in conjunction with the preset safety time margin, the safe rising time of the belt conveyor is determined. When the safe lifting time is reached, the controller controls the belt conveyor to rise to the pre-acceptance height. After the belt conveyor reaches the pre-acceptance height, the controller controls the laser cutter to perform the final separation cutting section, so that small workpieces that are easy to fall can be pre-accepted by the belt conveyor when the final separation is completed.

[0018] Compared with the prior art, the advantages of this invention are: This invention comprises a metal mold material support and unloading mechanism consisting of a first triangular support platform, a second triangular support platform that can be raised and lowered as a whole, and a belt conveyor that can be raised and lowered as a whole. Combined with a controller, a cutting head position detection unit, a lifting displacement detection unit, a drive load detection unit, and a workpiece status detection unit, it forms a closed-loop unloading process that connects cutting risk identification, separation planning, predictive acceptance, trial support identification, and anomaly handling. Based on the metal mold material contour data, layout data, and cutting path data, the controller identifies the metal workpiece formed after cutting. By combining the support relationship between the metal workpiece and the first and second triangular support platforms, it pre-determines the locations of small workpieces prone to falling and their corresponding jamming risks. This avoids passively judging the workpiece status only after cutting and improves the ability to predict the risk of small workpieces falling and jamming.

[0019] By identifying the final separation and cutting section for small workpieces prone to falling, and determining the safe lifting timing and pre-acceptance height based on the position of the final separation and cutting section, the operating status of the laser cutter, and the lifting status of the belt conveyor, multiple belt conveyors can enter the pre-acceptance state as a whole before the final separation of the workpiece. When the laser cutter executes the final separation and cutting section, the belt conveyor can promptly receive the small workpieces that have fallen downwards, reducing the possibility of the workpiece falling into the support gap, flipping, colliding, or entering the laser cutter body. Simultaneously, it avoids the belt conveyor rising too early and interfering with the laser cutting process.

[0020] Furthermore, this invention determines the separation result based on the state changes of easily falling small-sized workpieces and adjacent scrap skeletons, and performs separation correction when the workpieces are not completely separated to prevent workpieces with incomplete cuts or residual connections from being directly and forcibly lifted. After separation confirmation, the belt conveyor obtains the device's operating status and the metal workpiece's response status through overall trial lifting, thereby identifying lifting states such as normal lifting, edge jamming, residual connections, and mechanical obstruction. When the lifting status is normal, multiple belt conveyors are raised as a whole and synchronously transport the metal workpiece; when the lifting status is abnormal, the controller controls the belt conveyor to fall as a whole and performs release processing according to the type of abnormality. After the abnormality is resolved, the lifting is retested, thereby reducing situations such as workpiece tipping, scrap skeleton lifting, overload of the second linear motor, and jamming of the lifting mechanism.

[0021] By detecting the discharge status of metal workpieces using laser sensors, the system can also promptly control the belt conveyor to stop, reducing the risk of metal workpieces slipping from the discharge end. Therefore, while retaining the functions of adapting to and supporting metal molds of different sizes and providing overall conveying, this invention achieves predictive acceptance, separation confirmation, low-risk trial support, abnormal release, and re-lifting of small-sized workpieces, improving the automation, continuity, stability, and safety of the laser cutting process for metal molds. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the overall installation structure of the present invention; Figure 2 This is a half-sectional schematic diagram of the overall structure of the present invention; Figure 3 This is a schematic diagram of the structure of the first linear motor and the second linear motor of the present invention; Figure 4 This is a schematic diagram of the second connecting plate and support frame structure of the present invention; Figure 5 This is a schematic diagram of the laser sensor structure of the present invention; Figure 6 For the present invention Figure 2 Enlarged diagram of part A in the middle.

[0023] Figure 7 This is the main flowchart of the present invention; Figure 8 This is a flowchart illustrating the separation results and lifting status of the present invention.

[0024] Explanation of the labels in the diagram: 1. Laser cutting machine body; 2. U-shaped frame; 3. Laser cutting instrument; 4. First triangular support platform; 5. Support plate; 6. Laser sensor; 7. Second triangular support platform; 8. First connecting plate; 9. First linear motor; 10. Second linear motor; 11. Second connecting plate; 12. Support frame; 13. Belt conveyor device. Detailed Implementation

[0025] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0026] Example 1 Please see Figure 1-8 A laser cutting blanking device for metal mold processing includes a laser cutting machine body, a U-shaped frame, a laser cutter vertically mounted in the middle of the U-shaped frame, and multiple first triangular support platforms longitudinally and equidistantly installed in the cutting area of ​​the laser cutting machine body. The laser cutting machine body is equipped with a predictive acceptance and trial support control module, which includes a controller, a cutting head position detection unit, a lifting displacement detection unit, a drive load detection unit, and a workpiece status detection unit. A support plate is installed on the top surface of the discharge end of the laser cutting machine body. The support plate has an L-shaped structure and its horizontal end is flush with the top surface of the laser cutting machine body. A laser sensor for detecting the discharge of the cut material is installed on the horizontal end of the support plate. An adaptation and transportation component for transporting materials and adapting to smaller materials is installed inside the laser cutting machine body.

[0027] The adaptive transport component includes multiple second triangular support platforms equidistantly positioned between two first triangular support platforms on the same side, and each of the multiple second triangular support platforms has a first connecting plate longitudinally installed at both the front and rear ends of its bottom surface.

[0028] Both sides of the two first connecting plates are equipped with first fixing plates. The first fixing plates are L-shaped. The two first fixing plates on the same side are vertically fixed to the inner wall of the laser cutting machine body at their far ends. The far ends of the two first fixing plates on the same side are connected to the corresponding first linear motor output plate.

[0029] A transport area is provided between the multiple second triangular support platforms and the first triangular support platform.

[0030] Each of the multiple transport areas is equipped with a belt conveyor device installed longitudinally, and the bottom surface of the belt conveyor device is equipped with a support frame with a U-shaped structure.

[0031] Each of the aforementioned support frames has a second connecting plate longitudinally installed at both the front and rear ends of its bottom surface.

[0032] A second fixing plate is installed on both sides of the two second connecting plates. The second fixing plate has an L-shaped structure, and the far ends of the two second fixing plates on the same side are vertically provided with a second linear motor fixed to the inner wall of the laser cutting machine body.

[0033] The controller is used to read the cutting path and control the laser cutter, the first linear motor, the second linear motor, and the belt conveyor. The cutting head position detection unit is used to obtain the real-time position of the laser cutter; The lifting displacement detection unit is used to detect the overall lifting displacement of the second connecting plate. The drive load detection unit is used to collect the drive current of the second linear motor; The workpiece status detection unit is used to detect the height changes and relative positions of the metal workpiece and the scrap skeleton.

[0034] The steps for predicting the acceptance and trial delivery control module's cutting analysis are as follows: S1. The controller acquires metal mold processing data including metal mold outline data, layout data and cutting path data, identifies the metal workpiece formed after cutting according to the cutting path data, and extracts the closed cutting outline and cutting sequence corresponding to each metal workpiece; and determines the small-sized workpieces that are prone to falling and the corresponding jamming risk positions according to the support relationship between the metal workpiece and the first triangular support platform and the second triangular support platform. S2. The controller determines the final separation cutting segment based on the closed cutting contour and cutting sequence corresponding to the small workpiece that is prone to falling, and determines the safe lifting time and pre-acceptance height in combination with the position of the final separation cutting segment, the operating status of the laser cutter and the lifting status of the belt conveyor. S3. Based on the safe rising timing and pre-acceptance height, the controller coordinates and controls the laser cutter and the belt conveyor to perform the pre-acceptance operation, so that the belt conveyor rises to the pre-acceptance height as a whole before the final separation and cutting section is executed; controls the laser cutter to execute the final separation and cutting section, and determines the separation result based on the state changes of the easily falling small-sized workpiece and the adjacent waste skeleton; S4. The controller controls the laser cutter to perform separation correction or controls the belt conveyor to perform overall trial lifting based on the separation result, obtains the device operation status and metal workpiece response status during the trial lifting process, and determines the lifting status based on the device operation status and metal workpiece response status. S5. The controller controls the belt conveyor to perform overall conveying or abnormal release according to the lifting status, and re-executes the trial lifting identification after the abnormality is resolved.

[0035] S2 determines the final separation and cutting segment, the safe lifting timing, and the pre-bearing height, including: The closed cutting contour corresponding to the small workpiece that is easy to fall is divided into multiple continuous cutting segments. According to the projection position relationship between each continuous cutting segment and the belt conveyor device 13 at the pre-bearing height, the continuous cutting segment that avoids the projection area of ​​the belt conveyor device 13 is selected as the final separation cutting segment. The cutting sequence is adjusted so that the final separation cutting segment is executed after the other continuous cutting segments of the corresponding closed cutting contour are completed. Based on the remaining running time required for the laser cutter 3 to move from its current position to the starting position of the final separation cutting section, and the rising time required for the belt conveyor 13 to rise from its current height to the pre-acceptance height, and in conjunction with the preset safety time margin, the safe rising time of the belt conveyor 13 is determined. When the controller reaches the safe lifting point, it controls the belt conveyor 13 to rise to the pre-acceptance height. After the belt conveyor 13 reaches the pre-acceptance height, it controls the laser cutter 3 to perform the final separation cutting section, so that small workpieces that are easy to fall can be pre-accepted by the belt conveyor 13 when the final separation is completed.

[0036] Working principle The metal mold to be processed is placed within the cutting area of ​​the laser cutting machine body 1. For smaller metal molds, the controller controls the first linear motor 9 to operate, causing multiple second triangular support platforms 7 to rise as a whole and fill the support gaps between adjacent first triangular support platforms 4, thereby improving the support stability of the metal mold.

[0037] The predictive acceptance and trial support control module reads the contour data, layout data, and cutting path data of the metal mold material, identifies each metal workpiece formed after cutting, and determines the easily dropped small-sized workpieces and their jamming risk locations based on the support relationship between each metal workpiece and the first triangular support platform 4 and the second triangular support platform 7. For easily dropped small-sized workpieces, the controller determines the final separation cutting segment based on its closed cutting contour and cutting sequence, allowing the laser cutter 3 to complete the cutting of the remaining contours first, while retaining the final separation cutting segment, so that the workpiece remains connected to the metal mold material before pre-acceptance.

[0038] The cutting head position detection unit acquires the real-time position of the laser cutter 3. The controller, combined with the time required for the laser cutter 3 to reach the final separation and cutting section, the current height of the belt conveyor 13, and the time required for it to rise to the pre-support height, determines the safe lifting timing. After reaching the safe lifting timing, the second linear motor 10 drives multiple belt conveyors 13 to rise as a whole to the pre-support height via the second connecting plate 11 and the support frame 12, bringing them close to the bottom surface of the metal mold but without actively lifting the metal mold.

[0039] Subsequently, the laser cutter 3 performs the final separation cutting section. Small, easily detachable workpieces are promptly received by the belt conveyor 13 after separation. The workpiece status detection unit detects the height changes and relative positions of the metal workpiece and adjacent scrap skeleton, and the controller determines the separation result accordingly. If the workpiece is not completely separated, the laser cutter 3 is controlled to perform supplementary cutting.

[0040] After confirming that the workpiece has been separated, multiple belt conveyor devices 13 continue to rise as a whole from the pre-acceptance height and lift the metal workpiece at a trial lifting speed. The lifting displacement detection unit detects the lifting status of the second connecting plate 11, the drive load detection unit collects the drive current of the second linear motor 10, the workpiece status detection unit detects the motion status of the metal workpiece, and the controller determines whether the workpiece is being lifted normally, stuck at the edge, has residual connection, or is being mechanically obstructed based on the above data.

[0041] When the lifting status is normal, multiple belt conveyor devices 13 rise to the conveying height as a whole and operate synchronously to transport the metal workpiece to the discharge end. When jamming, residual connection, or mechanical obstruction occurs, the controller controls the belt conveyor device 13 to fall back as a whole, and resolves the abnormality by lowering the second triangular support platform 7, reciprocating belt conveying, or supplementary cutting, and then retry lifting. After the metal workpiece reaches the discharge end, the laser sensor 6 sends a positioning signal to control the belt conveyor device 13 to stop running, completing the unloading.

[0042] Example 2 The main body 1 of the laser cutting machine is equipped with a predictive acceptance and trial support control module, which includes a controller, a cutting head position detection unit, a lifting displacement detection unit, a drive load detection unit, and a workpiece status detection unit.

[0043] The controller is used to read the cutting path and control the laser cutter 3, the first linear motor 9, the second linear motor 10, and the belt conveyor 13; The cutting head position detection unit is used to obtain the real-time position of the laser cutter 3; The lifting displacement detection unit is used to detect the overall lifting displacement of the second connecting plate 11; The drive load detection unit is used to collect the drive current of the second linear motor 10; The workpiece status detection unit is used to detect the height changes and relative positions of metal workpieces and scrap skeletons.

[0044] The steps for predicting the acceptance and trial support control module cutting analysis are as follows.

[0045] S1. Obtain the contour data, thickness data, layout data and cutting path data of the metal mold to be processed, and determine the positions of the first triangular support platform 4, the second triangular support platform 7 and the belt conveyor device 13 within the cutting area.

[0046] Identify each metal workpiece formed after cutting according to the cutting path, and determine the outline size, center of gravity position and effective overlap area between each metal workpiece and the first triangular support platform 4 and the second triangular support platform 7.

[0047] For the For a given metal workpiece, the effective support ratio is determined using the following formula: In the formula, For the first The effective support ratio of each metal workpiece; For the first The overlapping area of ​​the projected area of ​​a metal workpiece within the effective support area formed by the first triangular support platform 4 and the second triangular support platform 7. For the first The projected area of ​​the outline of a metal workpiece.

[0048] When the effective support ratio Less than the preset support ratio , or the When the center of gravity projection of a metal workpiece lies within the support gap between adjacent triangular support platforms, the metal workpiece is identified as a small-sized workpiece prone to falling. The preset support ratio... Pre-calibrate according to the thickness, material, and workpiece size of the metal mold.

[0049] At the same time, based on the positional relationship between the edge of the metal workpiece and the first triangular support platform 4 and the second triangular support platform 7, the risk position that the metal workpiece may enter between adjacent triangular support platforms after the cutting is completed is determined, and the corresponding metal workpiece is marked as a jamming risk workpiece.

[0050] S2. Based on the outline and cutting sequence of the small workpiece that is prone to falling, divide the corresponding closed cutting outline into multiple continuous cutting segments, and determine the final separation cutting segment from them.

[0051] The final separation cutting segment is the remaining cutting segment used to connect the small workpiece and the metal mold material after the rest of the contour cutting of the small workpiece has been completed. Before the final separation cutting segment is completed, the small workpiece remains connected to prevent it from falling prematurely between the first triangular support 4 and the second triangular support 7.

[0052] The controller determines the safe lifting moment of the belt conveyor 13 based on the current position of the laser cutter 3, the remaining cutting path, the current position of the belt conveyor 13, and the pre-support height. The calculation formula is as follows: In the formula, In order to target the A safe lifting moment for small workpieces that are prone to falling; The current moment; For laser cutter 3 to move from its current position to the next position The remaining path length required to traverse the final separation and cutting segment of a small workpiece; The average speed of laser cutter 3 as it travels along the remaining path; The pre-bearing height of the belt conveyor 13; The current height of the belt conveyor 13; The overall lifting speed of the belt conveyor 13; This is to allow for a preset safety time margin.

[0053] Pre-contract height The top of the first triangular support platform 4 and the second triangular support platform 7 is lower than the top of the belt conveyor device 13, so that a bearing gap is maintained between the belt conveyor device 13 and the bottom surface of the metal mold material.

[0054] When the calculated safe rise time is earlier than the current time, the controller suspends the final separation and cutting section until the belt conveyor 13 reaches the pre-acceptance height.

[0055] S3 controls the laser cutter 3 to first complete the cutting path for ordinary metal workpieces and small workpieces that are easy to fall off, except for the final separation cutting section.

[0056] After reaching the safe lifting moment, the laser cutter 3 shuts off the laser output and leaves the lifting interference area of ​​the belt conveyor 13. The controller controls the second linear motor 10 to run, and through the second connecting plate 11 and the support frame 12, it drives the multiple belt conveyors 13 to rise as a whole to the pre-acceptance height.

[0057] After the belt conveyor 13 reaches the pre-acceptance height, it stops lifting and lowering. At this time, the belt conveyor 13 is close to the bottom surface of the metal mold, but does not actively lift the metal mold. Then, the laser cutter 3 is controlled to cut the final separation section, so that the small workpiece that is easy to fall off is separated from the metal mold.

[0058] The workpiece status detection unit collects the heights of the small-sized workpiece and the adjacent scrap skeleton before and after the final separation cutting section, and determines the displacement of the small-sized workpiece and its displacement relative to the scrap skeleton. The calculation formula is as follows: In the formula, For the first The height displacement of a small workpiece before and after the final separation and cutting section; For the first The height displacement of a small workpiece relative to the scrap skeleton; and For small workpieces, at the detection time and detection time Height; and The waste skeleton at the detection time and detection time Height; This refers to the detection time before the final separation and cutting of the segment; This is the detection time after the final separation and cutting of the segment.

[0059] when Not less than the preset workpiece displacement ,and Not less than the preset relative displacement At that time, it was confirmed that the small workpiece had been completely separated from the metal mold.

[0060] When the final separation and cutting of the segments has been completed, but or If the corresponding conditions are not met, it is determined that small-sized workpieces may have incomplete cuts or residual connections, and the belt conveyor 13 is controlled to remain at the pre-acceptance height.

[0061] S4. After the metal mold material is cut, control multiple belt conveyor devices 13 to continue to rise as a whole from the pre-acceptance height, and run at a trial lifting speed lower than the normal lifting speed when contacting the metal workpiece.

[0062] During the trial run, the actual lifting displacement of the second connecting plate 11, the commanded lifting displacement output by the controller, the equivalent drive current of the second linear motor 10, and the height change of the metal workpiece are collected, and the trial run state characteristics are constructed. The calculation formula is as follows: In the formula, This is a characteristic of the trial delivery state; This is the coefficient for following the lifting and lowering displacement. The workpiece lifting and following coefficient; The driving load variation coefficient; This refers to the actual lifting displacement of the second connecting plate 11; The displacement is determined by the command output by the controller. For the first time during the trial period The change in height of a metal workpiece. A positive number set to prevent the denominator from being zero; The equivalent drive current for the multiple second linear motors 10; This is the reference drive current for the belt conveyor 13 when it is lifted or lowered under no-load conditions. This is the rated drive current of the second linear motor 10.

[0063] When the displacement following coefficient Not less than the preset displacement following threshold and workpiece lifting following coefficient Not less than the preset lift-following threshold, and the driving load change coefficient If the load is not greater than the preset load threshold, it is determined that the metal workpiece has been properly detached from the triangular support platform.

[0064] when Increase and When the value is less than the preset lifting and following threshold, it is determined that the edge of the metal workpiece may be stuck between the first triangular support platform 4 or the second triangular support platform 7.

[0065] when Less than the preset displacement following threshold and As the height increases, it is determined that there is mechanical obstruction during the lifting process; when the metal workpiece and the scrap frame rise synchronously and the relative displacement is... Less than the preset relative displacement At that time, it was determined that there was a residual connection between the two.

[0066] The aforementioned thresholds are predetermined based on the no-load lifting test, standard workpiece lifting test, and jamming simulation test of the belt conveyor 13.

[0067] S5. When the lifting state is normal, control the multiple belt conveyor devices 13 to rise as a whole to a conveying height higher than the first triangular support platform 4 and the second triangular support platform 7, and control the multiple belt conveyor devices 13 to operate synchronously to convey the metal workpiece to the discharge end.

[0068] When the edge of the metal workpiece gets stuck, the multiple belt conveyor devices 13 are controlled to stop rising and descend as a whole to the release position. If the stuck position corresponds to the second triangular support platform 7, the first linear motor 9 is controlled to drive the multiple second triangular support platforms 7 to descend as a whole to expand the release space near the edge of the workpiece; then the multiple belt conveyor devices 13 are controlled to simultaneously perform short-distance forward and reverse conveying to remove the metal workpiece from the stuck position, and then the low-speed trial delivery is performed again.

[0069] When residual connections are detected between the metal workpiece and the scrap skeleton, multiple belt conveyors 13 are controlled to descend to the cutting safety height, and the laser cutter 3 is controlled to perform supplementary cutting on the residual connection position. After the supplementary cutting is completed, the overall pre-bearing and low-speed trial support are re-executed.

[0070] When a mechanical obstruction is detected, the multiple belt conveyor devices 13 are controlled to fall as a whole, and are lifted again after the obstruction of foreign objects or the stacking of workpieces is removed.

[0071] After the metal workpiece is normally conveyed to the discharge end, the laser sensor 6 detects the material's arrival status and controls the belt conveyor 13 to stop operating. After the material is picked up, the multiple belt conveyors 13 descend to their initial positions as a whole.

[0072] The above description is merely a preferred embodiment of the present invention; however, the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and its improved concept, should be covered within the scope of protection of the present invention.

Claims

1. A laser cutting blanking device for metal mold processing, comprising a laser cutting machine body (1), the laser cutting machine body (1) being provided with a U-shaped frame (2), a laser cutter (3) being vertically mounted in the middle of the U-shaped frame (2), and a plurality of first triangular support platforms (4) being longitudinally and equidistantly installed in the cutting area of ​​the laser cutting machine body (1), characterized in that: The main body (1) of the laser cutting machine is provided with a prediction and test support control module, which includes a controller, a cutting head position detection unit, a lifting displacement detection unit, a drive load detection unit and a workpiece status detection unit. The laser cutting machine body (1) has a support plate (5) installed on the top surface of the discharge end. The support plate (5) has an L-shaped structure and its horizontal end is flush with the top surface of the laser cutting machine body (1). The horizontal end of the support plate (5) is equipped with a laser sensor (6) for detecting the discharge of the cut material. The laser cutting machine body (1) is also equipped with a material transport component for transporting materials and for adapting to smaller materials.

2. The laser cutting blanking device for metal mold processing according to claim 1, characterized in that: The adaptive transport component includes multiple second triangular support platforms (7) equidistantly arranged between two first triangular support platforms (4) on the same side, and each of the multiple second triangular support platforms (7) has a first connecting plate (8) longitudinally installed at the front and rear ends of its bottom.

3. The laser cutting blanking device for metal mold processing according to claim 2, characterized in that: Both sides of the two first connecting plates (8) are equipped with first fixing plates. The first fixing plates are L-shaped, and the two first fixing plates on the same side are vertically fixed to the inner wall of the laser cutting machine body (1) at their far ends. The two first fixing plates on the same side are connected to the output plate of the corresponding first linear motor (9).

4. The laser cutting blanking device for metal mold processing according to claim 2, characterized in that: A transport area is provided between multiple second triangular support platforms (7) and first triangular support platforms (4).

5. The laser cutting blanking device for metal mold processing according to claim 4, characterized in that: Each of the multiple transport areas is longitudinally equipped with a belt conveyor (13), and the bottom surface of the belt conveyor (13) is equipped with a support frame (12) with a U-shaped structure.

6. The laser cutting blanking device for metal mold processing according to claim 5, characterized in that: Each of the support frames (12) has a second connecting plate (11) longitudinally installed at both the front and rear ends of its bottom surface.

7. The laser cutting blanking device for metal mold processing according to claim 6, characterized in that: Two second fixing plates are installed on both sides of the two second connecting plates (11). The second fixing plates are L-shaped, and the two second fixing plates on the same side are vertically fixed to the inner wall of the laser cutting machine body (1) at their far ends.

8. The laser cutting blanking device for metal mold processing according to claim 7, characterized in that: The controller is used to read the cutting path and control the laser cutter (3), the first linear motor (9), the second linear motor (10), and the belt conveyor (13). The cutting head position detection unit is used to obtain the real-time position of the laser cutter (3); The lifting displacement detection unit is used to detect the overall lifting displacement of the second connecting plate (11); The drive load detection unit is used to collect the drive current of the second linear motor (10); The workpiece status detection unit is used to detect the height changes and relative positions of the metal workpiece and the scrap skeleton.

9. A laser cutting blanking device for metal mold processing according to claim 8, characterized in that: The steps for predicting the acceptance and trial delivery control module's cutting analysis are as follows: S1. The controller acquires metal mold processing data including metal mold outline data, layout data and cutting path data, identifies the metal workpiece formed after cutting according to the cutting path data, and extracts the closed cutting outline and cutting sequence corresponding to each metal workpiece; and determines the small-sized workpieces that are prone to falling and the corresponding jamming risk positions according to the support relationship between the metal workpiece and the first triangular support platform and the second triangular support platform. S2. The controller determines the final separation cutting segment based on the closed cutting contour and cutting sequence corresponding to the small workpiece that is prone to falling, and determines the safe lifting time and pre-acceptance height in combination with the position of the final separation cutting segment, the operating status of the laser cutter and the lifting status of the belt conveyor. S3. Based on the safe rising timing and pre-acceptance height, the controller coordinates and controls the laser cutter and the belt conveyor to perform the pre-acceptance operation, so that the belt conveyor rises to the pre-acceptance height as a whole before the final separation and cutting section is executed; controls the laser cutter to execute the final separation and cutting section, and determines the separation result based on the state changes of the easily falling small-sized workpiece and the adjacent waste skeleton; S4. The controller controls the laser cutter to perform separation correction or controls the belt conveyor to perform overall trial lifting based on the separation result, obtains the device operation status and metal workpiece response status during the trial lifting process, and determines the lifting status based on the device operation status and metal workpiece response status. S5. The controller controls the belt conveyor to perform overall conveying or abnormal release according to the lifting status, and re-executes the trial lifting identification after the abnormality is resolved.

10. A laser cutting blanking device for metal mold processing according to claim 9, characterized in that: The determination of the final separation and cutting segment, the safe lifting timing, and the pre-acceptance height in S2 includes: The closed cutting contour corresponding to the small workpiece that is easy to fall is divided into multiple continuous cutting segments. According to the projection position relationship between each continuous cutting segment and the belt conveyor (13) at the pre-bearing height, the continuous cutting segments that avoid the projection area of ​​the belt conveyor (13) are selected as the final separation cutting segments. The cutting sequence is adjusted so that the final separation cutting segment is executed after the other continuous cutting segments of the corresponding closed cutting contour are completed. Based on the remaining running time required for the laser cutter (3) to move from its current position to the starting position of the final separation cutting section, and the rising time required for the belt conveyor (13) to rise from its current height to the pre-acceptance height, and in conjunction with the preset safety time margin, the safe rising time of the belt conveyor (13) is determined. When the controller reaches the safe lifting time, it controls the belt conveyor (13) to rise to the pre-acceptance height. After the belt conveyor (13) reaches the pre-acceptance height, it controls the laser cutter (3) to perform the final separation cutting segment, so that small workpieces that are easy to fall can be pre-accepted by the belt conveyor (13) when the final separation is completed.

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