A metal plate bending prevention laser cutting device

Abstract

This invention provides a laser cutting device for preventing bending of metal sheets, belonging to the technical field of laser cutting devices. The device includes a worktable and a metal sheet placed on the worktable. The worktable is equipped with a cutting assembly for cutting the metal sheet. It also includes a fixing assembly slidably mounted on the worktable. The fixing assembly includes multiple sets of fixing frames slidably mounted on the worktable, with multiple sets of fixing columns on the side of the fixing frames closest to the metal sheet. Before cutting, this invention can clamp and fix the sheet material at multiple points on both sides of the area to be cut. During the cutting process, the supporting columns move with the cutting and provide real-time support. Simultaneously, combined with air cooling control above and below the cutting position, it reduces thermal stress concentration and linear accumulation effects during laser cutting, suppresses longitudinal bending deformation during the slitting of long sheets, and improves the flatness of the cut sheet.

Description

Technical Field

[0001] This invention belongs to the field of laser cutting device technology, and specifically relates to a laser cutting device for preventing bending of metal sheets. Background Technology

[0002] Laser cutting of metal sheets is an advanced processing technology that uses a high-power-density laser beam to achieve high-precision and high-efficiency cutting, and it has been widely used in various manufacturing fields. In actual production, it is often necessary to cut long metal coils or standard plates into shorter sheets or blanks using laser cutting. The cut sheets need to maintain a flat appearance to facilitate subsequent transportation, storage, or contour processing of precision parts.

[0003] Chinese patent CN118989645B discloses a laser cutting device for preventing bending of metal sheets, including a frame. An outer cover is mounted on the upper end of the frame. Two sets of clamping modules are mirror-mounted on both sides of the upper end inside the outer cover. An extraction module is installed between the two sets of clamping modules. A movable laser cutting module is installed inside the extraction module. A gas purification module is installed on the side of the frame. A blowing module is installed between the clamping module and the gas purification module. An electrical control cabinet is installed on one side of the outer cover. This invention solves the problem that in existing laser cutting devices, when the metal sheet is first clamped to the device on its sides before being cut by the cutting head, the metal sheet may bend during the cutting process, affecting its quality. Furthermore, the laser beam can contaminate the gas at the cutting point, affecting the surrounding working environment.

[0004] However, the above technical solution still has the following problems: when cutting a long metal sheet into a shorter sheet using laser, the continuous cutting over a long distance will produce a significant linear cumulative heat effect, resulting in uneven heating of the sheet near the cut and generating huge thermal stress. When the cutting is completed and the constraint is released, this stress will cause the sheet to arch as a whole and cause severe longitudinal bending deformation of the cut sheet, affecting the processing quality of the metal sheet and subsequent processing. Summary of the Invention

[0005] The purpose of this invention is to provide a metal sheet anti-bending laser cutting device, which aims to solve the problem in the prior art that when cutting long plates, the linear cumulative heat effect causes the plate to undergo severe longitudinal bending deformation, which is inconvenient for correction and subsequent processing.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a laser cutting device for preventing bending of metal sheets, comprising: a worktable and a metal sheet placed on the worktable, the worktable being provided with a cutting assembly for cutting the metal sheet, and further comprising: The fixing component is slidably mounted on the worktable. The fixing component includes multiple sets of fixing frames slidably mounted on the worktable. Multiple sets of fixing columns are provided on the side of the fixing frame close to the metal plate. A guide cylinder is slidably mounted on the bottom of the fixing frame. A support block is slidably mounted on the side of the guide cylinder away from the fixing columns. A support column is slidably mounted on the side of the support block away from the guide cylinder. A clearance mechanism is provided on the support block. The clearance mechanism can clearance the cutting component when it is working. A cleaning component, installed on the workbench, absorbs the fumes and dust generated during cutting. The pressing and straightening component is mounted on the fixed component. The pressing and straightening component can correct the bending position of the cut. The pressing and straightening component includes a second sensor mounted on one side of the support column, and a second indicator plate that works in conjunction with the second sensor is mounted on the bottom of the support block.

[0007] Its effect is that by setting up a fixed component including a fixed column, a movable support block and a support column, a dynamic clamping and support system can be formed on both sides of the cutting path, which can effectively resist the thermal stress of cutting, prevent the overall displacement and initial deformation of the plate, and provide a stable foundation for subsequent processing.

[0008] A further technical solution of the present invention is that the fixing frame is symmetrically arranged on the upper and lower sides of the metal plate, the fixing frames located on the same side of the metal plate are symmetrically arranged and respectively arranged on both sides of the guide frame, the fixing column is located on the side of the fixing frame away from the guide frame, the fixing frame can drive the fixing column to rise and fall synchronously, the bottom of the fixing frame is provided with a sliding cavity, the guide cylinder can slide back and forth along the sliding cavity, the top of the fixing frame is provided with a first hydraulic valve communicating with the sliding cavity, and the worktable is provided with a second control system that can control the movement of the fixing frame.

[0009] A further technical solution of the present invention is that the support block can slide back and forth along the inside of the guide cylinder, one end of the support block is connected to an elastic element, the other end of the elastic element is connected to the inside of the guide cylinder, a guide cavity is provided at the bottom of the support block away from the guide cylinder, the support column is slidably disposed in the guide cavity, a second hydraulic valve is provided at the top of the support block to control the movement of the support column, the second hydraulic valve can communicate with the guide cavity, and one end of the support column can contact the metal plate.

[0010] Its effects are as follows: the support block is elastically connected to the guide cylinder through the elastic element, so that the support column has the ability to automatically reset; the second hydraulic valve can precisely control the fine adjustment and pressurization of the support column, which can provide stable auxiliary support during cutting and provide a power source for subsequent active correction.

[0011] A further technical solution of the present invention is that a first sensing element is provided at the bottom of the fixing frame, and a first indicator plate is provided on the guide cylinder to cooperate with the first sensing element.

[0012] A further technical solution of the present invention is that the cutting assembly includes a guide frame slidably disposed on the worktable, a cutting head frame slidably disposed on the guide frame, a cutting head disposed at the bottom of the cutting head frame, the guide frame being able to drive the cutting head frame to rise and fall synchronously, the cutting head being able to move up and down along the cutting head frame, and a first control system being disposed inside the worktable to control the movement of the guide frame, the cutting head frame and the cutting head.

[0013] A further technical solution of the present invention is that the clearance mechanism includes a tapered inclined surface disposed at one end of the support block, and a guide inclined surface that cooperates with the tapered inclined surface is disposed on the cutting head frame, and the guide inclined surface is disposed on the front and rear sides of the cutting head frame in the moving direction.

[0014] A further technical solution of the present invention is that the cleaning component includes a slag removal frame slidably disposed below the metal plate, the slag removal frame slidably disposed on a guide frame, the slag removal frame is disposed below the cutting head frame and moves synchronously with the cutting head frame, the guide frame can drive the slag removal frame to rise and fall synchronously, a slag removal hood is disposed on the side of the slag removal frame near the metal plate, the slag removal hood is located directly below the cutting head, an air extraction structure is disposed inside the slag removal frame, an auxiliary inclined surface is disposed on the slag removal frame, the auxiliary inclined surface has the same structure and function as the guide inclined surface, the auxiliary inclined surface can cooperate with the conical inclined surface on the support block below the metal plate, and the first control system can control the movement of the slag removal frame.

[0015] Its effects are as follows: the slag removal frame moves synchronously with the cutting head, and the slag removal hood is always located directly below the cutter, which can efficiently collect the falling molten slag and fumes. Its auxiliary inclined surface design is consistent with the principle of the upper clearance mechanism, ensuring that the lower support column avoids the slag synchronously, achieving all-round cleaning and improving the working environment.

[0016] A further technical solution of the present invention is that a ventilation hood is provided on the side of the support column near the metal plate, and a ventilation valve connected to the ventilation hood is provided on the guide cylinder, and an air intake pipe and an air blowing pipe are connected to the ventilation valve.

[0017] A further technical solution of the present invention is that the first sensing element is configured as a magnetic induction displacement sensor, the second sensing element is configured as a magnetic induction displacement sensor, and the elastic element is configured as a spring.

[0018] Compared with the prior art, the beneficial effects of the present invention are: 1. This invention sets up multiple sets of fixed columns and adjustable support columns to clamp and fix the two sides of the plate to be cut at multiple points before cutting. During the cutting process, the support columns follow the cutting movement in real time to provide support. At the same time, with the air blowing cooling control above and below the cutting position, the heat stress concentration and linear accumulation effect during laser cutting are reduced, the longitudinal bending deformation generated when cutting long plates is suppressed, and the flatness of the plate after cutting is improved.

[0019] 2. By setting up sensors to detect the displacement of the support columns, the system automatically identifies local bending deformation after the plate is cut, and links the hydraulic valve and the air blowing system to achieve rapid cooling and mechanical pressing correction of the protruding parts. This allows the plate to achieve initial flatness restoration immediately after cutting, improving production efficiency and plate processing quality. At the same time, it can adapt to the processing requirements of different cutting paths and always provide support on both sides of the cutting position. Attached Figure Description

[0020] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used in conjunction with embodiments of the invention to explain the invention and do not constitute a limitation thereof. In the drawings: Figure 1 This is a schematic diagram of the overall structure of a specific embodiment of the present invention; Figure 2 This is a partial structural diagram of a specific embodiment of the present invention; Figure 3 for Figure 2 Enlarged structural diagram at point A; Figure 4 for Figure 2 Enlarged structural diagram at point B; Figure 5 This is a schematic diagram showing the positions of the cutting head frame and the slag removal frame in a specific embodiment of the present invention; Figure 6 This is a schematic diagram of the structure of the fixing component in a specific embodiment of the present invention; Figure 7 This is a partial front view of the fixing component in a specific embodiment of the present invention; Figure 8 This is a partial schematic diagram of the fixing component in a specific embodiment of the present invention; Figure 9 This is a cross-sectional view of the fixing component in a specific embodiment of the present invention; Figure 10 This is a schematic diagram of the installation structure of the fixing frame and the guide cylinder in a specific embodiment of the present invention; Figure 11 for Figure 6 A magnified schematic diagram of the structure at point C. In the diagram: 1. Workbench; 2. Metal plate; 3. Cutting assembly; 31. Guide frame; 32. Cutting head frame; 321. Cutting head; 322. Guide ramp; 4. Fixing assembly; 41. Fixing frame; 411. Fixing column; 412. Slide cavity; 413. First hydraulic valve; 414. First sensor; 42. Guide cylinder; 421. First indicator plate; 43. Support block; 431. Elastic element; 432. Guide cavity; 433. Second hydraulic valve; 434. Conical ramp; 44. Support column; 441. Ventilation hood; 442. Ventilation valve; 5. Cleaning assembly; 51. Slag removal frame; 511. Auxiliary ramp; 52. Slag removal hood; 6. Pressing and straightening assembly; 61. Second sensor; 62. Second indicator plate. Detailed Implementation

[0021] 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.

[0022] Please see Figures 1-11 The present invention provides the following technical solution: a laser cutting device for preventing bending of metal sheets, comprising a worktable 1, a metal sheet 2, a cutting component 3, a fixing component 4, a cleaning component 5, and a pressing and straightening component 6.

[0023] Workbench 1 is placed horizontally on the ground. The metal plate 2 to be cut is placed on workbench 1. Cutting assembly 3 is slidably mounted on workbench 1, and can cut the metal plate 2 to the required size. Fixing assembly 4 is slidably mounted on workbench 1 and positioned on both sides of the metal plate 2 at the cutting position. Fixing assembly 4 can initially clamp and fix the metal plate 2 at the cutting position to prevent severe deformation and displacement of the metal plate 2 under thermal stress during cutting, which would affect subsequent cutting processes. Cleaning assembly 5 is mounted on workbench 1. Cleaning assembly 5 can absorb the fumes and debris generated during cutting, preventing contamination of the cutting equipment and the surface of the metal plate 2. Pressing and straightening assembly 6 is mounted on fixing assembly 4. Pressing and straightening assembly 6 can detect the degree of bending deformation at the cutting position of the cut metal plate 2 and can press and straighten the position to restore it to its initial flat state.

[0024] like Figures 1-3As shown, the cutting assembly 3 includes a guide frame 31 slidably mounted on the worktable 1. The guide frame 31 can reciprocate along the length of the metal plate 2 placed on the worktable 1. A cutting head frame 32 is slidably mounted on the guide frame 31, and a cutting head 321 is mounted at the bottom of the cutting head frame 32. The cutting head frame 32 is located above the metal plate 2 and can reciprocate along the guide frame 31. The guide frame 31 itself can rise and fall, driving the cutting head frame 32 to move closer to or further away from the metal plate 2. When it approaches the metal plate 2, it cuts through the cutting head 321. The cutting head 321 can move up and down along the cutting head frame 32 to fine-tune the distance between the cutting head 321 and the metal plate 2 during cutting. A first control system (not shown in the figure) is installed inside the worktable 1, which can control the movement of the guide frame 31, the cutting head frame 32, and the cutting head 321.

[0025] like Figures 2-3 and Figures 6-9 As shown, the fixing assembly 4 includes multiple sets of fixing frames 41 slidably disposed on the worktable 1. The fixing frames 41 are symmetrically arranged on the upper and lower sides of the metal plate 2. The fixing frames 41 located on the same side of the metal plate 2 are symmetrically arranged and respectively disposed on both sides of the guide frame 31. Multiple sets of fixing columns 411 are provided on the side of the fixing frame 41 closest to the metal plate 2. The fixing columns 411 are located on the side of the fixing frame 41 away from the guide frame 31. The fixing frame 41 itself can be raised and lowered, driving the fixing columns 411 to move synchronously, approaching or moving away from the metal plate 2. When approaching the metal plate 2, the fixing columns 411 can contact the surface of the metal plate 2, and the multiple sets of fixing columns 411 can clamp and fix the two sides of the part of the metal plate 2 that needs to be cut at multiple points. A sliding cavity 412 is provided at the bottom of the fixing frame 41. The sliding cavity 412 is located on the side of the fixing columns 411 closest to the guide frame 31. A guide cylinder 42 is slidably disposed inside the sliding cavity 412. The guide cylinder 42 can slide back and forth along the sliding cavity 412 to approach or move away from the guide frame 31. The top of the fixed frame 41 is provided with a first hydraulic valve 413 that communicates with the slide cavity 412. Opening the first hydraulic valve 413 allows hydraulic oil to be injected into the slide cavity 412, thereby controlling the movement position of the guide cylinder 42. The worktable 1 is provided with a second control system (not shown in the figure), which can control the movement of the fixed frame 41.

[0026] A support block 43 is slidably disposed on the side of the guide cylinder 42 away from the fixed column 411. The support block 43 can reciprocate along the inside of the guide cylinder 42. One end of the support block 43 is connected to an elastic element 431, and the other end of the elastic element 431 is connected to the inside of the guide cylinder 42. In the initial state, under the action of the elastic element 431, the support block 43 can extend a certain distance out of the guide cylinder 42. In this embodiment, the elastic element 431 is set as a spring. A guide cavity 432 is provided at the bottom of the side of the support block 43 away from the guide cylinder 42. A support column 44 is slidably disposed in the guide cavity 432. A second hydraulic valve 433 is provided at the top of the support block 43, which can communicate with the guide cavity 432. Opening the second hydraulic valve 433 can fill the guide cavity 432 with hydraulic oil, thereby controlling the movement position of the support column 44. One end of the support column 44 can contact the metal plate 2 and assist the fixed column 411 in supporting the metal plate 2. The support column 44 is closer to the cutting position of the metal plate 2 than the fixed column 411.

[0027] A first sensor 414 is provided at the bottom of the fixed frame 41. The first sensor 414 can be configured as a magnetic induction displacement sensor. A first indicator plate 421 is provided on the guide cylinder 42 to cooperate with the first sensor 414. When the guide cylinder 42 slides back and forth along the sliding cavity 412, the first sensor 414 and the first indicator plate 421 always correspond. The first sensor 414 can detect the displacement of the guide cylinder 42 relative to the fixed frame 41, and then detect the distance between the support block 43 and the support column 44 and the fixed column 411.

[0028] During operation, before cutting the metal plate 2 into segments, the first control system controls the guide frame 31 to move the cutting head 321 to the designated cutting position. Then, the fixing frame 41 is moved to both sides of the guide frame 31, and the metal plate 2 is clamped and fixed by the corresponding fixing columns 411 located on both sides of the guide frame 31 and at the top and bottom ends of the metal plate 2. This ensures the metal plate 2 is in a fixed position, preventing it from slipping or rotating during processing due to equipment vibration, cutting back force, or its own stress release. Simultaneously, the clamping by the fixing columns 411 ensures support while avoiding the problems of plate deformation and unstable clamping caused by thermal stress that are common with traditional long clamps. Then, the first hydraulic valve 413 is opened to control the guide cylinder 42 to move a certain distance, bringing the support column 44 closer to the cutting position of the metal plate 2. Subsequently, the second hydraulic valve 433 is opened to control the support column 44 to move and contact the metal plate 2. The fixing columns 411 and support columns 44 simultaneously fix and limit the position of the metal plate 2.

[0029] like Figures 3-8As shown, a clearance mechanism is provided on the support block 43. This clearance mechanism ensures that the cutting component 3 will not interfere with the fixed component 4 during operation and guarantees the support of the fixed component 4 for the cutting position. The clearance mechanism includes a tapered inclined surface 434 at one end of the support block 43. The tapered inclined surface 434 is vertically arranged and located on the side of the support block 43 near the support column 44. The cutting head frame 32 is provided with a guide inclined surface 322 that cooperates with the tapered inclined surface 434. The guide inclined surface 322 is located on both the front and rear sides of the cutting head frame 32 in the direction of movement.

[0030] When the cutting assembly 3 is working, the guide ramp 322 first contacts the conical ramp 434, and then the conical ramp 434 presses the support block 43 away from the cutting head frame 32. The support column 44 then moves away from the cutting position to make way for the cutting head 321, while compressing the elastic element 431. After cutting, as the cutting head frame 32 continues to move, the guide ramp 322 on its rear side in the direction of movement begins to contact the conical ramp 434. As the cutting head frame 32 moves further away, the contact pressure between the two gradually decreases. Under the restoring force of the elastic element 431, the support block 43 drives the support column 44 to gradually return to its original position and restore support for the cutting position of the metal plate 2. By setting the elastic element 431 and the conical ramp 434, it is ensured that the support column 44 can be returned to its original position, while also buffering the operation of the clearance mechanism, preventing vibration caused by the contact between the cutting assembly 3 and the support column 44 during operation, which could lead to inaccurate cutting position.

[0031] like Figures 4-8 As shown, the cleaning component 5 includes a slag removal frame 51 slidably disposed below the metal plate 2. The slag removal frame 51 is slidably disposed on the guide frame 31 and is disposed below the cutting head frame 32 and moves synchronously with the cutting head frame 32. The guide frame 31 can drive the slag removal frame 51 to rise and fall synchronously. A slag removal hood 52 is disposed on the side of the slag removal frame 51 near the metal plate 2. The slag removal hood 52 is located directly below the cutting head 321. The slag removal frame 51 is equipped with an air extraction structure, which can absorb the molten slag and fumes sprayed downward from the metal plate 2 during cutting through the slag removal hood 52. The cutting head 321 usually blows auxiliary gas into the metal plate 2 during cutting. The air extraction effect of the slag removal hood 52 helps to remove the auxiliary gas along with the fumes and molten slag generated during cutting, maintain the airflow stability in the cutting area, and prevent the spread of pollution. The slag removal frame 51 is equipped with an auxiliary inclined surface 511. The auxiliary inclined surface 511 has the same structure and function as the guide inclined surface 322. The auxiliary inclined surface 511 can cooperate with the conical inclined surface 434 on the support block 43 below the metal plate 2 and can push the support block 43 away from the cutting position. The movement of the slag removal frame 51 can be controlled by the first control system.

[0032] A ventilation hood 441 is installed on the side of the support column 44 near the metal plate 2. A ventilation valve 442 connected to the ventilation hood 441 is installed on the guide cylinder 42. An air intake pipe and an air blowing pipe are connected to the ventilation valve 442. When the support block 43 is under force and moves away from the cutting head frame 32, the ventilation valve 442 at this position opens, allowing the ventilation hood 441 to connect with the air intake pipe. At this time, the ventilation hood 441 can absorb the fumes emitted during cutting, preventing the fumes from drifting to distant locations where they cannot be absorbed and thus polluting the environment. When the cutting head frame 32 moves away from this position, the support block 43 returns to its original position, and the ventilation hood 441 moves closer to the cutting position. At this time, the air exchange valve 442 continues to work, so that the air blowing pipe is connected to the air exchange hood 441. Air is blown to the cutting position through the air exchange hood 441. At this time, the opening of the air exchange valve 442 is small, so that the upper and lower surfaces of the cutting position are cooled evenly, preventing the cooling from being too fast and reducing the occurrence of bending and deformation of the metal plate 2 due to the large thermal stress at the cutting position. At the same time, since the air exchange hood 441 is close to the cutting position, it can better cool the cutting position and its surroundings evenly.

[0033] like Figures 7-10 As shown, the pressing correction assembly 6 includes a second sensor 61 disposed on one side of the support column 44. The second sensor 61 can be configured as a magnetic displacement sensor, and a second indicator plate 62 is disposed at the bottom of the support block 43 to cooperate with the second sensor 61. When the support column 44 slides back and forth along the guide cavity 432, the second sensor 61 and the second indicator plate 62 always correspond, and the displacement of the support column 44 relative to the support block 43 is detected by the second sensor 61.

[0034] Because the support column 44 is close to the cutting position and can clamp and fix the cutting position, when thermal stress at the cutting position causes the metal plate 2 to bend and deform, the second sensor 61 detects that the support column 44 begins to displace relative to the support block 43. At this time, the metal plate 2 at this position bends, causing one side to bulge and the other side to dent. At this time, the air exchange valve 442 on the side of the bulge continues to blow air and the opening widens, increasing the amount of air blown from the air exchange hood 441 at this position to the cutting position. At the same time, the air exchange valve 442 on the side of the dent decreases or closes, causing the temperature of the bent bulge position to drop rapidly, slowing down the cooling of the dented position, and accelerating the cooling and contraction of the bulge part of the metal plate 2. At the same time, the second hydraulic valve 433 at this position starts to work, controlling the support column 44 to move and squeeze the metal plate 2 at the bulge position. With the help of external force, the bent position is restored to its initial state until the second sensor 61 detects that the support column 44 has returned to its initial position. This structure ensures that the material completes cooling and contraction in a clamped and flat state, ensuring its flat shape after cooling and preventing secondary deformation during the cooling process. At the same time, the contact area is cooled by the ventilation hood 441 to prevent excessive heat accumulation and extend the service life of the support column 44 itself.

[0035] If the cutting path is not straight and has a certain curvature, the first hydraulic valve 413 is opened before cutting, and the guide cylinders 42 at different positions are moved by different distances, so that the support column 44 adapts to different cutting paths and approaches the cutting position of the metal plate 2. The first sensor 414 and the first indicator plate 421 cooperate to detect whether the distance moved by the guide cylinder 42 is appropriate, thereby adapting to the cutting and fixing requirements of different metal plates 2.

Claims

1. A laser cutting device for preventing bending of metal sheets, comprising: A workbench (1) and a metal plate (2) placed on the workbench (1), the workbench (1) being provided with a cutting assembly (3) for cutting the metal plate (2), characterized in that it further includes: The fixing component (4) is slidably set on the workbench (1). The fixing component (4) includes multiple sets of fixing frames (41) slidably set on the workbench (1). Multiple sets of fixing columns (411) are provided on the side of the fixing frame (41) close to the metal plate (2). A guide cylinder (42) is slidably set at the bottom of the fixing frame (41). A support block (43) is slidably set on the side of the guide cylinder (42) away from the fixing column (411). A support column (44) is slidably set on the side of the support block (43) away from the guide cylinder (42). A clearance mechanism is provided on the support block (43). The clearance mechanism can clearance the cutting component (3) when it is working. A cleaning component (5) is installed on the workbench (1) and is capable of absorbing the smoke and dust generated during cutting. The pressing and straightening component (6) is set on the fixed component (4). The pressing and straightening component (6) can correct the bending position of the cut. The pressing and straightening component (6) includes a second sensor (61) set on one side of the support column (44). The bottom of the support block (43) is provided with a second indicator plate (62) that works with the second sensor (61). The second sensor (61) determines the bending of the plate by detecting the displacement of the support column (44) relative to the second indicator plate (62), and controls the support column (44) to extend for pressing and straightening when a bending protrusion is detected. At the same time, the air volume is adjusted to accelerate the cooling and straightening. A ventilation hood (441) is provided on the side of the support column (44) near the metal plate (2). A ventilation valve (442) connected to the ventilation hood (441) is provided on the guide cylinder (42). An air intake pipe and an air blowing pipe are connected to the ventilation valve (442).

2. The anti-bending laser cutting device for metal sheets according to claim 1, characterized in that: The fixed frame (41) is symmetrically arranged on the upper and lower sides of the metal plate (2). The fixed frames (41) located on the same side of the metal plate (2) are symmetrically arranged and respectively arranged on both sides of the guide frame (31). The fixed column (411) is located on the side of the fixed frame (41) away from the guide frame (31). The fixed frame (41) can drive the fixed column (411) to rise and fall synchronously. The bottom of the fixed frame (41) is provided with a sliding cavity (412). The guide cylinder (42) can slide back and forth along the sliding cavity (412). The top of the fixed frame (41) is provided with a first hydraulic valve (413) that communicates with the sliding cavity (412). The workbench (1) is provided with a second control system that can control the movement of the fixed frame (41).

3. The anti-bending laser cutting device for metal sheets according to claim 1, characterized in that: The support block (43) can slide back and forth inside the guide cylinder (42). One end of the support block (43) is connected to an elastic element (431), and the other end of the elastic element (431) is connected inside the guide cylinder (42). A guide cavity (432) is provided at the bottom of the support block (43) away from the guide cylinder (42). The support column (44) is slidably disposed in the guide cavity (432). A second hydraulic valve (433) is provided at the top of the support block (43) to control the movement of the support column (44). The second hydraulic valve (433) can communicate with the guide cavity (432). One end of the support column (44) can contact the metal plate (2).

4. The anti-bending laser cutting device for metal sheets according to claim 3, characterized in that: The bottom of the fixed frame (41) is provided with a first sensor (414), and the guide cylinder (42) is provided with a first indicator plate (421) that works in conjunction with the first sensor (414).

5. The anti-bending laser cutting device for metal sheets according to claim 1, characterized in that: The cutting assembly (3) includes a guide frame (31) slidably mounted on the workbench (1), a cutting head frame (32) slidably mounted on the guide frame (31), a cutting head (321) mounted at the bottom of the cutting head frame (32), the guide frame (31) can drive the cutting head frame (32) to rise and fall synchronously, and the cutting head (321) can move up and down along the cutting head frame (32). The workbench (1) is equipped with a first control system that can control the movement of the guide frame (31), the cutting head frame (32) and the cutting head (321).

6. The anti-bending laser cutting device for metal sheets according to claim 5, characterized in that: The clearance mechanism includes a tapered inclined surface (434) at one end of the support block (43), and a guide inclined surface (322) that cooperates with the tapered inclined surface (434) is provided on the cutting head frame (32). The guide inclined surface (322) is located on the front and rear sides of the cutting head frame (32) in the direction of movement.

7. The anti-bending laser cutting device for metal sheets according to claim 6, characterized in that: The cleaning component (5) includes a slag removal frame (51) slidably disposed below the metal plate (2). The slag removal frame (51) is slidably disposed on the guide frame (31). The slag removal frame (51) is disposed below the cutting head frame (32) and moves synchronously with the cutting head frame (32). The guide frame (31) can drive the slag removal frame (51) to rise and fall synchronously. A slag removal hood (52) is provided on the side of the slag removal frame (51) close to the metal plate (2). The slag removal hood (52) is located directly below the cutting head (321). An air extraction structure is provided inside the slag removal frame (51). An auxiliary inclined surface (511) is provided on the slag removal frame (51). The auxiliary inclined surface (511) and the guide inclined surface (322) have the same structure and function. The auxiliary inclined surface (511) can cooperate with the conical inclined surface (434) on the support block (43) below the metal plate (2). The first control system can control the movement of the slag removal frame (51).

8. The anti-bending laser cutting device for metal sheets according to claim 4, characterized in that: The first sensing element (414) is configured as a magnetic induction displacement sensor, the second sensing element (61) is configured as a magnetic induction displacement sensor, and the elastic element (431) is configured as a spring.

Images