Laser cutting device and cutting method for metal product machining

Abstract

The invention relates to the technical field of laser cutting, and discloses a laser cutting device for metal product machining and a cutting method.The laser cutting device comprises a placing box body and peripheral driving equipment, a laser adjusting box body is arranged above the placing box body, and a laser emitter used for cutting metal is arranged at the bottom of the laser adjusting box body; a plurality of to-be-cut metal plates are stacked in the placing box body, a plate pushing part is arranged between every two adjacent to-be-cut metal plates, and the laser adjusting box body slides above the to-be-cut metal plates through a moving frame. Extruded oil enters the oil cylinder through the rubber hose, then the piston rod is pushed to drive the sliding plate to drive the metal plates to be cut to be staggered to form a graphic representation state, and the staggered distance is also b, so that it is guaranteed that in the inclined laser process, the positions of cut inclined planes on the stacked metal plates to be cut are the same, and the cutting efficiency is improved. Therefore, a plurality of metal plates to be cut can be cut at the same time.

Description

Technical Field

[0001] The present invention relates to the field of laser cutting technology, and in particular to a laser cutting device and a cutting method for metal product processing. Background Art

[0002] Laser cutting uses a high-power density laser beam to irradiate the material to be cut, so that the material is quickly heated to the vaporization temperature and evaporated to form holes. As the beam moves on the material, the holes continuously form a very narrow slit to complete the cutting of the material. Therefore, laser cutting devices are often used in metal product processing. When the metal product laser cutting device currently used is processed, the metal product is fixed, and the laser cutting process is performed on a single metal plate of the metal product. However, there are usually the following problems in the cutting process:

[0003] If the metal plate is cut vertically, that is, the laser and the metal plate are perpendicular to each other, then multiple metal plates can be stacked for better and faster processing. However, if the metal plate is cut by an inclined laser, the stacked cutting state of multiple metal plates cannot be cut normally. If this cutting method is used, except for the top metal plate which is a qualified product, the metal plates below will become failed products, and there will be a problem of inconsistent cutting parts.

[0004] Therefore, we designed a laser cutting device and a cutting method for metal product processing. Summary of the invention

[0005] The purpose of the present invention is to solve the problem that when a metal plate is subjected to inclined laser cutting, multiple metal plates cannot be cut normally when being stacked and cut, and a laser cutting device and a cutting method for metal product processing are proposed.

[0006] In order to achieve the above object, the present invention adopts the following technical solutions:

[0007] A laser cutting device for processing metal products comprises a placing box body and an external driving device, wherein a laser adjustment box body is arranged above the placing box body, and a laser emitter for cutting metal is arranged at the bottom of the laser adjustment box body, a plurality of metal plates to be cut are stacked in the placing box body, and a push plate portion is arranged between two adjacent metal plates to be cut, the laser adjustment box body slides above the plurality of metal plates to be cut via a movable frame, a cross lifting plate is lifted and lowered in the laser adjustment box body, and an electric moving block slides at the bottom of the cross lifting plate, four distance measuring portions are arranged on the cross lifting plate, and the distance measuring portions are connected to the push plate portion via a rubber hose.

[0008] Preferably, the movable frame includes a first sliding rod and a second sliding rod which are vertically arranged up and down, and side movable plates are provided at both ends of the first sliding rod and the second sliding rod, and the side movable plates slide on the top of the placement box body, and the first sliding rod and the second sliding rod rise and fall and slide on the side movable plates, and the first sliding rod and the second sliding rod are vertically inserted on the laser adjustment box body.

[0009] Preferably, a side wall hole is opened on the side wall of the laser adjustment box body, a rotating ball is rotatably provided at the bottom of the laser adjustment box body, and the laser emitter is fixed on the rotating ball, a universal ball is provided at the bottom of the electric moving block, and a coaxially arranged swing rod and swing cylinder are provided between the universal ball and the rotating ball.

[0010] Preferably, the distance measuring unit comprises:

[0011] A cross through-sliding hole is provided on the cross lifting plate, and a top block penetrating the cross through-sliding hole is provided on the top of the electric moving block.

[0012] Preferably, the distance measuring unit further includes:

[0013] A limit plate is arranged on the top of a cross lifting plate. A fixed collar is also arranged on the cross lifting plate. A push plate is slidably arranged on the cross lifting plate, and a return spring is arranged between the push plate and the fixed collar.

[0014] Preferably, a connecting rod is fixed on the push plate, and a threaded rod is provided at the other end of the connecting rod. A replacement cylinder is sleeved on the fixed collar, and a connecting push portion is provided in the replacement cylinder.

[0015] Preferably, the connecting pusher comprises:

[0016] An oil chamber, in which a piston slides, and the piston slides in the oil chamber through a slide groove and a slider;

[0017] A thread groove, the thread groove is coaxially provided on the piston facing the connecting rod, and the thread groove is adapted to the threaded rod;

[0018] At least one oil outlet hole is formed at the bottom of the replacement cylinder.

[0019] Preferably, the push plate portion comprises:

[0020] The clamping plate has a fixed plate fixed on the top of the clamping plate, and a sliding plate sliding on the bottom of the clamping plate, and the sliding plate slides on the bottom of the clamping plate through the top block and the bottom groove, and the clamping plate is disassembled and installed on the inner wall of the placing box body through the fixing frame.

[0021] Preferably, an oil cylinder is provided in the bottom groove, and a piston rod slides in the oil cylinder, and the other end of the piston rod is fixed to the top block, and the other end of the rubber hose is connected to the oil cylinder.

[0022] A cutting method of a laser cutting device for metal product processing, the specific operation steps are as follows:

[0023] S1: First, for inclined laser cutting, turn on the electric moving block to slide at the bottom of the cross lifting plate, and at the same time, the peripheral drive device also drives the cross lifting plate to rise and fall in the laser adjustment box body;

[0024] S2: When the electric moving block slides toward the four ends of the cross lifting plate, the top block on the top of the electric moving block will push the push plate toward the fixed collar and press the reset spring;

[0025] The amount of oil squeezed out of the oil chamber by the piston is affected by the inner diameter of the oil chamber. When the number of oil outlet holes is greater and the inner diameter of the oil chamber is larger, when the sliding distance in the oil chamber of the replacement cylinder is the same, the amount of oil squeezed out from any oil outlet hole is the same, and ultimately the amount of oil flowing into the oil cylinder through the rubber hose is the same;

[0026] S3: wherein the corresponding replacement cylinder is selected according to the number of metal plates to be cut by laser cutting. During the replacement process, the oil outlet hole is in a blocked state, the replacement cylinder is inserted into the fixed sleeve ring, and the replacement cylinder is rotated to allow the threaded groove on the piston to be threadedly connected with the threaded rod at the end of the connecting rod, and the blocked state of the oil outlet hole is released, and the rubber hose is connected to the corresponding oil outlet hole;

[0027] S4: The fixed plate and the sliding plate are connected to the outer wall of the metal plate to be cut through an external connecting device, and then the oil enters the oil cylinder through a rubber hose, and then pushes the piston rod and brings the sliding plate and the metal plate to be cut to be displaced;

[0028] S5: Then, the laser adjustment box body is driven to slide on the moving frame under the action of the peripheral driving device again, thereby realizing four-way cutting of the metal plate to be cut.

[0029] The beneficial effects of the present invention are:

[0030] 1. In the present invention, the amount of oil squeezed out of the oil chamber by the piston is affected by the inner diameter of the oil chamber. When the number of oil outlet holes is greater and the inner diameter of the oil chamber is larger, it can be ensured that the connecting rod will drive the piston to slide in the oil chamber of the replacement cylinder for the same distance, and the amount of oil squeezed out from any oil outlet hole is the same, which ultimately leads to the same amount of oil flowing into the oil cylinder through the rubber hose.

[0031] 2. In the present invention, the oil after extrusion enters the oil cylinder through the rubber hose, and then pushes the piston rod and brings the sliding plate and the metal plate to be cut to be displaced to form the state shown in the figure, wherein the dislocation distance is also b. This arrangement ensures that during the tilting laser process, the cut inclined surface is in the same position on the stacked metal plates to be cut, so that multiple metal plates to be cut can be cut simultaneously. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 This is a schematic structural diagram of a laser cutting device for metal product processing proposed by the present invention;

[0033] Figure 2 This is a schematic structural diagram of a laser adjustment box body in a laser cutting device for metal product processing proposed by the present invention;

[0034] Figure 3 for Figure 2 A schematic diagram of the structure enlargement at the center A;

[0035] Figure 4 This is a schematic diagram of the structure of a clamping plate in a laser cutting device for metal product processing proposed by the present invention;

[0036] Figure 5 It is a two-dimensional isometric view of a clamping plate in a laser cutting device for metal product processing proposed by the present invention;

[0037] Figure 6 This is a schematic structural diagram of a first state of a replacement barrel in a laser cutting device for metal product processing proposed by the present invention;

[0038] Figure 7 This is a structural schematic diagram of a second state of a replacement barrel in a laser cutting device for metal product processing proposed by the present invention;

[0039] Figure 8 This is a schematic diagram of the first state of the laser inclined cutting in the present invention;

[0040] Fig. 9 It is a schematic diagram of the second state of the laser inclined cutting in the present invention.

[0041] In the figure: 1. Placement box body; 2. Side moving plate; 3. Laser adjustment box body; 4. First sliding rod; 5. Second sliding rod;

[0042] 6. Metal plate to be cut; 61. Top metal plate; 62. Lower metal plate;

[0043] 7. Clamp; 8. Replacement cylinder; 9. Fixed plate; 10. Sliding plate; 11. Bottom groove; 12. Oil cylinder; 13. Piston rod; 14. Cross lifting plate; 15. Fixed collar; 16. Side wall hole; 17. Rotating ball; 18. Swing rod; 19. Swing cylinder; 20. Electric moving block; 21. Return spring; 22. Connecting rod; 23. Limit plate; 24. Cross through sliding hole; 25. Top block; 26. Push plate; 27. Oil chamber; 28. Oil outlet hole; 29. ​​Slide groove; 30. Piston; 31. Sliding block; 32. Threaded groove; 33. Threaded rod. DETAILED DESCRIPTION

[0044] Reference Figure 1-Figure 9 A laser cutting device for metal product processing includes a placing box body 1 and an external driving device. A laser adjustment box body 3 is arranged above the placing box body 1, and a laser emitter for cutting metal is arranged at the bottom of the laser adjustment box body 3. The laser emitter is used to cut the metal plate 6 to be cut.

[0045] The laser adjustment box body 3 slides above multiple metal plates 6 to be cut through a moving frame. The moving frame includes a first sliding rod 4 and a second sliding rod 5 that are vertically arranged up and down. Both ends of the first sliding rod 4 and the second sliding rod 5 are provided with side moving plates 2, and the side moving plates 2 slide on the top of the placement box body 1. The first sliding rod 4 and the second sliding rod 5 rise and fall and slide on the side moving plates 2, and the first sliding rod 4 and the second sliding rod 5 are vertically inserted on the laser adjustment box body 3.

[0046] First, for inclined laser cutting, the electric moving block 20 is turned on to slide at the bottom of the cross lifting plate 14 , wherein the cross lifting plate 14 has four directions, and the rotating ball 17 is located directly below the center of the cross lifting plate 14 .

[0047] A cross lifting plate 14 is lifted and lowered inside the laser adjustment box body 3, and an electric moving block 20 slides at the bottom of the cross lifting plate 14. Four distance measuring parts are arranged on the cross lifting plate 14. The distance measuring parts are connected to the push plate part through a rubber hose. The distance measuring parts include a cross through sliding hole 24. The cross through sliding hole 24 is opened on the cross lifting plate 14. A top block 25 penetrating the cross through sliding hole 24 is arranged on the top of the electric moving block 20.

[0048] A side wall hole 16 is provided on the side wall of the laser adjustment box body 3, a rotating ball 17 is rotatably provided at the bottom of the laser adjustment box body 3, and the laser emitter is fixed on the rotating ball 17, a universal ball is provided at the bottom of the electric moving block 20, and a coaxially arranged swing rod 18 and a swing cylinder 19 are provided between the universal ball and the rotating ball 17. Since the electric moving block 20 is connected to the rotating ball 17 through the swing rod 18 and the swing cylinder 19, and the external driving device also drives the cross lifting plate 14 to rise and fall in the laser adjustment box body 3, it is necessary to ensure that the distance from the cross lifting plate 14 to the laser emitter is equal to the distance a between the tops of the two adjacent metal plates 6 to be cut.

[0049] In this way, during the horizontal movement of the electric moving block 20 , the horizontal movement distance is b, and therefore the two corresponding stacked metal plates 6 to be cut also need to be offset and moved by the same distance b.

[0050] The distance measuring part also includes a limit plate 23, which is arranged on the top of the cross-lifting plate 14. The cross-lifting plate 14 is also provided with a fixed ring 15. A push plate 26 is slid on the cross-lifting plate 14, and a reset spring 21 is provided between the push plate 26 and the fixed ring 15. When the electric moving block 20 slides toward the four ends of the cross-lifting plate 14, the top block 25 on the top of the electric moving block 20 will push the push plate 26 to move toward the fixed ring 15 and press the reset spring 21. The horizontal movement distance of the electric moving block 20 is b, and the connecting rod 22 will drive the piston 30 to slide in the oil chamber 27 in the replacement cylinder 8 for the same distance b.

[0051] A connecting rod 22 is fixed on the push plate 26, and a threaded rod 33 is provided at the other end of the connecting rod 22. A replacement cylinder 8 is sleeved on the fixed collar 15, and a connecting push portion is provided in the replacement cylinder 8. The connecting push portion includes an oil chamber 27, and a piston 30 slides in the oil chamber 27, and the piston 30 slides in the oil chamber 27 through a slide groove 29 and a slider 31. The amount of oil squeezed out of the oil chamber 27 by the piston 30 is affected by the inner diameter of the oil chamber 27. When the number of oil outlet holes 28 increases and the inner diameter of the oil chamber 27 increases, it is ensured that the connecting rod 22 will drive the piston 30 to slide in the oil chamber 27 in the replacement cylinder 8. When the sliding distance is the same, the amount of oil squeezed out from any oil outlet hole 28 is the same, which ultimately leads to the same amount of oil flowing into the oil cylinder 12 through the rubber hose.

[0052] The threaded groove 32 is coaxially opened on the piston 30 on the side facing the connecting rod 22, and the threaded groove 32 is adapted to the threaded rod 33. At least one oil outlet hole 28 is opened at the bottom of the replacement cylinder 8, wherein the corresponding replacement cylinder 8 is selected according to the number of metal plates 6 to be cut by laser cutting as required, and the number of metal plates 6 to be cut that need to be cut corresponds to the oil outlet hole 28 of the replacement cylinder 8, that is, the corresponding replacement cylinder 8 is replaced and inserted into the side wall hole 16. It should be noted that during the replacement process, the oil outlet hole 28 is in a blocked state, the replacement cylinder 8 is inserted into the fixed sleeve 15, and the replacement cylinder 8 is rotated so that the threaded groove 32 on the piston 30 is threadedly connected with the threaded rod 33 at the end of the connecting rod 22, and the blocked state of the oil outlet hole 28 is released, and the rubber hose is connected to the corresponding oil outlet hole 28.

[0053] A plurality of metal plates 6 to be cut are stacked in the placing box body 1, and a push plate portion is provided between two adjacent metal plates 6 to be cut, the push plate portion comprising a clamping plate 7, a fixed plate 9 is fixed on the top of the clamping plate 7, a sliding plate 10 slides on the bottom of the clamping plate 7 through a top block and a bottom groove 11, and the clamping plate 7 is disassembled and installed on the inner wall of the placing box body 1 through a fixing frame.

[0054] A sliding plate 10 slides at the bottom of the clamp 7, wherein the fixed plate 9 and the sliding plate 10 are connected to the outer wall of the metal plate 6 to be cut through an external connecting device, ensuring that the fixed plate 9 and the sliding plate 10 slide closely against the outer wall of the metal plate 6 to be cut and do not separate, and then the oil enters the oil cylinder 12 through the rubber hose.

[0055] An oil cylinder 12 is provided in the bottom groove 11, and a piston rod 13 slides in the oil cylinder 12, and the other end of the piston rod 13 is fixed to the top block, and the other end of the rubber hose is connected to the oil cylinder 12, and then the piston rod 13 is pushed and the sliding plate 10 is displaced together with the metal plate 6 to be cut to form the shown state, wherein the dislocation distance is also b. This arrangement ensures that during the tilting laser process, the cutting inclined surface is in the same position on the stacked metal plates 6 to be cut, so that multiple metal plates 6 to be cut can be cut simultaneously.

[0056] Then, the laser adjustment box body 3 is driven to slide on the moving frame under the action of the peripheral driving device again, thereby realizing four-way cutting of the metal plate 6 to be cut.

[0057] The working principle and specific operation steps of the present invention are as follows:

[0058] S1: First, for inclined laser cutting, the electric moving block 20 is turned on to slide at the bottom of the cross-lifting plate 14, wherein the cross-lifting plate 14 has four positions, and the rotating ball 17 is located directly below the center of the cross-lifting plate 14. Since the electric moving block 20 is connected to the rotating ball 17 through the swing rod 18 and the swing cylinder 19, and the external driving device also drives the cross-lifting plate 14 to rise and fall in the laser adjustment box body 3, it is necessary to ensure that the distance from the cross-lifting plate 14 to the laser transmitter is equal to the distance a between the tops of the two adjacent metal plates 6 to be cut, so that during the horizontal movement of the electric moving block 20, the horizontal movement distance is b, so it is also necessary to displace and move the two corresponding stacked metal plates 6 to be cut by the same distance b;

[0059] S2: When the electric moving block 20 slides toward the four ends of the cross lifting plate 14, the top block 25 on the top of the electric moving block 20 will push the push plate 26 to move toward the fixed ring 15 and press the reset spring 21, wherein the horizontal movement distance of the electric moving block 20 is b, then the connecting rod 22 will drive the piston 30 to slide in the oil chamber 27 in the replacement cylinder 8 for the same distance b;

[0060] The amount of oil squeezed out of the oil chamber 27 by the piston 30 is affected by the inner diameter of the oil chamber 27. When the number of the oil outlet holes 28 is greater and the inner diameter of the oil chamber 27 is larger, it is ensured that the connecting rod 22 drives the piston 30 to slide in the oil chamber 27 in the replacement cylinder 8. Under the same sliding distance, the amount of oil squeezed out from any oil outlet hole 28 is the same, and finally the amount of oil flowing into the oil cylinder 12 through the rubber hose is the same;

[0061] S3: wherein the corresponding replacement cylinder 8 is selected according to the number of metal plates 6 to be cut by laser cutting, and the number of metal plates 6 to be cut corresponds to the oil outlet hole 28 of the replacement cylinder 8, that is, the corresponding replacement cylinder 8 is replaced and inserted into the side wall hole 16. It should be noted that during the replacement process, the oil outlet hole 28 is in a blocked state, the replacement cylinder 8 is inserted into the fixed sleeve ring 15, and the replacement cylinder 8 is rotated to allow the threaded groove 32 on the piston 30 to be threadedly connected with the threaded rod 33 at the end of the connecting rod 22, and the blocked state of the oil outlet hole 28 is released, and the rubber hose is connected to the corresponding oil outlet hole 28;

[0062] S4: The fixed plate 9 and the sliding plate 10 are connected to the outer wall of the metal plate 6 to be cut through an external connection device, ensuring that the fixed plate 9 and the sliding plate 10 slide closely against the outer wall of the metal plate 6 to be cut and do not separate, and then the oil enters the oil cylinder 12 through the rubber hose, and then pushes the piston rod 13 and brings the sliding plate 10 and the metal plate 6 to be cut to be displaced, forming the state shown in the figure, wherein the dislocation distance is also b, such a setting ensures that during the tilting laser process, the cutting inclined surface is in the same position on the stacked metal plates 6 to be cut, so that multiple metal plates 6 to be cut can be cut simultaneously;

[0063] S5: Then, the laser adjustment box body 3 is driven to slide on the moving frame under the action of the peripheral driving device again, thereby achieving four-way cutting of the metal plate 6 to be cut.

[0064] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A laser cutting device for metal product processing, comprising a placement box body (1) and an external drive device, wherein a laser adjustment box body (3) is arranged above the placement box body (1), and a laser transmitter for cutting metal is arranged at the bottom of the laser adjustment box body (3), characterized in that: A plurality of metal plates (6) to be cut are stacked and arranged in the placing box body (1), and a push plate portion is provided between two adjacent metal plates (6) to be cut. The laser adjustment box body (3) slides above the plurality of metal plates (6) to be cut via a movable frame. A cross lifting plate (14) is lifted and lowered in the laser adjustment box body (3), and an electric moving block (20) slides at the bottom of the cross lifting plate (14). Four distance measuring portions are provided on the cross lifting plate (14), and the distance measuring portions are connected to the push plate portion via a rubber hose.

2. A laser cutting device for metal product processing according to claim 1, characterized in that: The movable frame comprises a first sliding rod (4) and a second sliding rod (5) which are arranged vertically and in an upper and lower direction. Both ends of the first sliding rod (4) and the second sliding rod (5) are provided with side movable plates (2), and the side movable plates (2) slide on the top of the placement box body (1). The first sliding rod (4) and the second sliding rod (5) are lifted and slid on the side movable plates (2), and the first sliding rod (4) and the second sliding rod (5) are vertically inserted on the laser adjustment box body (3).

3. A laser cutting device for metal product processing according to claim 2, characterized in that: The side wall of the laser adjustment box body (3) is provided with a side wall hole (16); the bottom of the laser adjustment box body (3) is provided with a rotating ball (17) for rotation, and the laser emitter is fixed on the rotating ball (17); the bottom of the electric moving block (20) is provided with a universal ball, and a coaxially arranged swing rod (18) and a swing cylinder (19) are provided between the universal ball and the rotating ball (17).

4. A laser cutting device for metal product processing according to claim 3, characterized in that: The distance measuring unit comprises: A cross through-sliding hole (24) is provided on the cross lifting plate (14), and a top block (25) penetrating the cross through-sliding hole (24) is provided on the top of the electric moving block (20).

5. The laser cutting device for metal product processing according to claim 4, characterized in that: The distance measuring unit also includes: A limit plate (23) is arranged on the top of a cross lifting plate (14), a fixing ring (15) is also arranged on the cross lifting plate (14), a push plate (26) is slidably arranged on the cross lifting plate (14), and a return spring (21) is arranged between the push plate (26) and the fixing ring (15).

6. A laser cutting device for metal product processing according to claim 5, characterized in that: A connecting rod (22) is fixed on the push plate (26), and a threaded rod (33) is provided at the other end of the connecting rod (22). A replacement cylinder (8) is sleeved on the fixed collar (15), and a connecting push portion is provided inside the replacement cylinder (8).

7. A laser cutting device for metal product processing according to claim 6, characterized in that: The connecting pusher comprises: An oil chamber (27), wherein a piston (30) slides in the oil chamber (27), and the piston (30) slides in the oil chamber (27) via a slide groove (29) and a slide block (31); A thread groove (32), wherein the thread groove (32) is coaxially formed on the piston (30) on the side facing the connecting rod (22), and the thread groove (32) is adapted to the thread rod (33); At least one oil outlet hole (28) is provided at the bottom of the replacement cylinder (8).

8. The laser cutting device for metal product processing according to claim 7, characterized in that: The push plate portion comprises: A clamping plate (7), a fixed plate (9) is fixed on the top of the clamping plate (7), and a sliding plate (10) is slidable on the bottom of the clamping plate (7), and the sliding plate (10) slides on the bottom of the clamping plate (7) through a top block and a bottom groove (11), and the clamping plate (7) is disassembled and installed on the inner wall of the placement box body (1) through a fixing frame.

9. The laser cutting device for metal product processing according to claim 8, characterized in that: An oil cylinder (12) is arranged in the bottom groove (11), a piston rod (13) slides in the oil cylinder (12), and the other end of the piston rod (13) is fixed to the top block, and the other end of the rubber hose is connected to the oil cylinder (12).

10. A cutting method of a laser cutting device for metal product processing, applied to a laser cutting device for metal product processing as claimed in claim 9, characterized in that: The specific steps are as follows: S1: First, for inclined laser cutting, the electric moving block (20) is turned on to slide at the bottom of the cross lifting plate (14), and at the same time, the external driving device also drives the cross lifting plate (14) to rise and fall in the laser adjustment box body (3); S2: When the electric moving block (20) slides toward the four ends of the cross lifting plate (14), the top block (25) on the top of the electric moving block (20) pushes the push plate (26) toward the fixed ring (15) and presses the return spring (21); The amount of oil squeezed out of the oil chamber (27) by the piston (30) is affected by the inner diameter of the oil chamber (27). When the number of the oil outlet holes (28) is greater and the inner diameter of the oil chamber (27) is larger, the amount of oil squeezed out from any oil outlet hole (28) is the same when the sliding distance in the oil chamber (27) in the replacement cylinder (8) is the same, and ultimately the amount of oil flowing into the oil cylinder (12) through the rubber hose is the same. S3: wherein the corresponding replacement cylinder (8) is selected according to the number of metal plates (6) to be cut by laser cutting. During the replacement process, the oil outlet hole (28) is in a blocked state. The replacement cylinder (8) is inserted into the fixed sleeve (15), and the replacement cylinder (8) is rotated so that the threaded groove (32) on the piston (30) is threadedly connected with the threaded rod (33) at the end of the connecting rod (22), and the blocked state of the oil outlet hole (28) is released, and the rubber hose is connected to the corresponding oil outlet hole (28); S4: wherein the fixed plate (9) and the sliding plate (10) are connected to the outer wall of the metal plate (6) to be cut through an external connecting device, and then the oil enters the oil cylinder (12) through the rubber hose, and then pushes the piston rod (13) and brings the sliding plate (10) and the metal plate (6) to be cut to a different position; S5: Then, the laser adjustment box body (3) is driven to slide on the moving frame under the action of the peripheral driving device again, thereby achieving four-way cutting of the metal plate (6) to be cut.

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