Laser cutting head switching component of a laser cutting machine

Abstract

The present invention relates to the field of laser cutting machines, and specifically to a laser cutting head switching assembly of a laser cutting machine, comprising a base, a mobile truss arranged on the base, and a numerical control system, wherein the mobile truss comprises two vertical trusses, two horizontal trusses, and a connecting portion arranged at the ends of the horizontal trusses, wherein the two vertical trusses are arranged opposite to each other; when the horizontal truss is located between the two vertical trusses, the connecting portion is used to fix the ends of the horizontal trusses to the vertical trusses or to separate the ends of the horizontal trusses from the vertical trusses; a moving block and a laser cutting head installed on the lower surface of the moving block, wherein the two horizontal trusses are both installed with moving blocks; and a driving portion, wherein the driving portion is used to drive the horizontal trusses to move along the X-axis direction after the two ends of the horizontal trusses are separated from the corresponding vertical trusses. Through this device, when the laser cutting machine is cutting a plate, if the laser cutting head is damaged, another laser cutting head can be used in time to replace the damaged laser cutting head for cutting, thereby improving the cutting efficiency of the laser cutting machine.

Description

Technical Field

[0001] The invention relates to the field of laser cutting machines, and in particular to a laser cutting head switching component of a laser cutting machine. Background Art

[0002] Laser cutting machines use light beams to replace traditional mechanical knives. They have the characteristics of high precision and fast cutting, and are increasingly used in the field of mechanical processing. When the laser cutting machine is cutting, the laser cutting head cuts the plate into various shapes through a set program. However, the applicant has found that when the laser cutting machine is cutting the plate, if the laser cutting head is damaged, it needs to be stopped for replacement, thereby reducing the cutting efficiency of the laser cutting machine.

[0003] In the patent with application number CN202010413249.0 and patent name "A laser cutting head adjustment and conversion system for a laser cutting machine", it includes a laser cutting head body, a rotating circle, a cylindrical mirror, a focusing mirror, a fiber laser, a digital potentiometer, a switching power supply, a controller, a capacitive sensor, an obstacle avoidance sensor and a servo mechanism. The laser cutting head body is arranged in the servo mechanism, the laser cutting head body is connected to the fiber laser, the rotating circle is arranged in rotation in the laser cutting head body, the cylindrical mirror is arranged in the rotating circle, the focusing mirror is slid in the laser cutting head body, a capacitive sensor is arranged at the end of the laser cutting head body, the obstacle avoidance sensor is arranged on the side wall of the laser cutting head body, the fiber laser is electrically connected to the switching power supply through the digital potentiometer, and the controller is electrically connected to the digital potentiometer, the capacitive sensor, and the obstacle avoidance sensor. The system ensures that the laser diameter, power, cutting speed are adapted to the workpiece thickness, but does not solve the above technical problems. Summary of the invention

[0004] In view of this, the purpose of the present invention is to propose a laser cutting head switching component for a laser cutting machine to solve the problem that when the laser cutting head is damaged while the laser cutting machine is cutting a plate, the machine needs to be stopped for replacement, thereby reducing the cutting efficiency of the laser cutting machine.

[0005] Based on the above purpose, the present invention provides a laser cutting head switching assembly of a laser cutting machine, comprising a base, a mobile truss arranged on the base and a numerical control system arranged in the laser cutting machine, wherein the mobile truss comprises two vertical trusses, two horizontal trusses and a connecting portion arranged at the ends of the horizontal trusses, the two vertical trusses are arranged opposite to each other, the bottom ends of the vertical trusses are installed on the base, and the vertical trusses move along the X-axis direction under the control of the numerical control system; when the horizontal truss is located between the two vertical trusses, the connecting portion is used to fix the ends of the horizontal trusses to the vertical trusses or to separate the ends of the horizontal trusses from the vertical trusses;

[0006] The laser cutting head switching assembly also includes:

[0007] A moving block and a laser cutting head installed on the lower surface of the moving block, wherein the moving blocks are installed on the two transverse trusses, and the central axis of the transverse trusses coincides with the Y axis. Under the control of the CNC system, the moving block moves along the Y axis direction, and the laser cutting head moves along the Z axis direction;

[0008] The driving part is used to drive the transverse truss to move along the X-axis direction after the two ends of the transverse truss are separated from the corresponding vertical trusses respectively.

[0009] Further, the driving part includes a driving assembly corresponding to the vertical truss, and the driving assembly includes:

[0010] A motor is arranged on one side of the base, a screw having one end fixedly connected to the output shaft of the motor, the other end of the screw being rotatably connected to a fixing seat arranged on the other side of the base, the cross truss is provided with a rotating hole penetrating the side surface thereof, and the screw passes through the rotating holes on the two cross trusses;

[0011] An end face hole provided on the end face of the transverse truss, the end face hole passing through the side wall of the rotating hole;

[0012] An arc-shaped plate slidably connected to the end hole, the side of the arc-shaped plate facing the rotating hole is an arc-shaped surface, and the arc-shaped surface is provided with a first thread, and the side surface of the screw is provided with a second thread, and the first thread matches the second thread;

[0013] A driving member used to drive the arc plate to move along the end hole.

[0014] Furthermore, the driving member is a cylinder, which is fixed to the end surface of the transverse truss through a fixing member, and the output shaft of the cylinder is fixed to the side of the arc plate facing away from the rotating hole.

[0015] Furthermore, the connecting portion includes:

[0016] Linkage rod, the two end faces of the vertical truss perpendicular to the X-axis are both provided with side openings, the side openings correspond to the ends of the transverse trusses, the inner side faces of the vertical trusses are provided with linkage holes corresponding to the side openings, the linkage holes are close to the positions of the corresponding side openings, and the linkage rod is slidably connected with the side openings;

[0017] A connecting rod, an insertion rod with one end fixedly connected to the side surface of the connecting rod, the end of the linkage rod located outside the linkage hole is fixedly connected to the side surface of the connecting rod, a convex ring is provided at the end of the transverse truss, and a plug hole is provided on the end surface of the convex ring facing the moving block, and when the other end of the insertion rod is inserted into the plug hole, the end of the vertical truss is fixed in the side opening;

[0018] A linkage assembly used to move the connecting rod closer to or away from the vertical truss.

[0019] Furthermore, the linkage component includes:

[0020] A push rod, the side of the arc-shaped plate facing the insertion rod is provided with an inner hole, the side wall of the end surface hole facing the inner hole is provided with a through groove, the through groove penetrates the side surface of the cross truss, the push rod is slidably connected with the inner hole, and the push rod passes through the through groove, and the shortest distance between the side surface of the insertion rod and the arc-shaped plate is greater than the shortest distance between the end surface of the connecting rod facing the arc-shaped plate and the arc-shaped plate;

[0021] A linkage member for making the push rod slide along the inner hole;

[0022] A spring sleeved on the linkage rod has one end fixed to the side surface of the connecting rod and the other end fixed to the side surface of the vertical truss.

[0023] Furthermore, the linkage member includes a first electromagnet disposed at the top of the inner hole and a second electromagnet fixed inside the push rod.

[0024] Furthermore, the laser cutting head switching assembly also includes a protective cover, which is fixed to the lower surface of the moving block, and the laser cutting head is arranged in the protective cover.

[0025] Furthermore, a water diversion channel is provided in the protective cover, the opening of the water diversion channel is located on the lower surface of the protective cover, and the water diversion channel is connected to the water supply system of the laser cutting machine.

[0026] Beneficial effects of the present invention: using the laser cutting head switching assembly of a laser cutting machine of the present invention, before the laser cutting machine works, the two laser cutting heads are checked. If the laser cutting head is damaged, it is replaced. At this time, the two horizontal trusses are fixed between the two vertical trusses through the connecting part. When the operator puts the plate on the base, the CNC system controls the laser cutting head on one of the moving blocks to move to a suitable position along the Z-axis direction, and controls the moving block to move along the Y-axis direction, and controls the vertical truss to move along the X-axis direction. In this way, after the laser cutting head on the moving block is started, the plate can be cut. If the laser cutting head being cut is damaged during the cutting process, the CNC system immediately stops cutting. The laser cutting head on another moving block is controlled to replace the damaged laser cutting head for subsequent cutting. Then the connecting part on the transverse truss where the damaged laser cutting head is located separates the end of the transverse truss from the vertical truss. At this time, the driving part is actuated to move the transverse truss along the X-axis direction to a safe area. After completion, the staff will replace the damaged laser cutting head, and then use the driving part to move the transverse truss to the position where the vertical truss is at this time, and then fix the end of the transverse truss to the vertical truss through the connecting part. Through this device, when the laser cutting machine is cutting the plate, if the laser cutting head is damaged, another laser cutting head can be used in time to replace the damaged laser cutting head for cutting, thereby improving the cutting efficiency of the laser cutting machine. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings in the following description are only for the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0028] Figure 1 A top view of the present invention;

[0029] Figure 2 It is a top sectional view of the vertical truss in the present invention;

[0030] Figure 3 It is a partial enlarged view of the end of the transverse truss in the present invention;

[0031] Figure 4 It is a partial schematic diagram of the inner hole in the present invention;

[0032] Figure 5 is a top view of the curved plate in the present invention;

[0033] Figure 6 is a side view of the vertical truss of the present invention;

[0034] Figure 7It is a side view of the moving block in the present invention.

[0035] The markings in the figure are:

[0036] 1. Vertical truss; 2. Horizontal truss; 3. Moving block; 4. Motor; 5. Screw; 6. Side opening; 7. Cylinder; 8. End hole; 9. Arc plate; 10. Rotary hole; 11. Linkage rod; 12. Linkage hole; 13. Connecting rod; 14. Spring; 15. Insert rod; 16. Insert hole; 17. Through slot; 18. Push rod; 19. Inner hole; 20. First electromagnet; 21. Second electromagnet; 22. Laser cutting head; 23. Protective cover. DETAILED DESCRIPTION

[0037] In order to make the objectives, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with specific embodiments.

[0038] It should be noted that, unless otherwise defined, the technical terms or scientific terms used in the present invention should be understood by people with ordinary skills in the field to which the present invention belongs. The "first", "second" and similar words used in the present invention do not indicate any order, quantity or importance, but are only used to distinguish different components. "Include" or "comprise" and similar words mean that the elements or objects appearing before the word include the elements or objects listed after the word and their equivalents, without excluding other elements or objects. "Connect" or "connected" and similar words are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "Up", "down", "left", "right" and the like are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0039] In a first aspect of the present invention, a laser cutting head switching assembly of a laser cutting machine is provided, such as Figure 1 , Figure 7 As shown, it includes a base, a mobile truss arranged on the base and a numerical control system arranged in the laser cutting machine, the mobile truss includes two vertical trusses 1, two horizontal trusses 2 and a connecting portion arranged at the end of the horizontal trusses 2, the two vertical trusses 1 are arranged opposite to each other, the bottom end of the vertical truss 1 is installed on the base, and the vertical truss 1 moves along the X-axis direction under the control of the numerical control system; when the horizontal truss 2 is located between the two vertical trusses 1, the connecting portion is used to fix the end of the horizontal truss 2 to the vertical truss 1 or to separate the end of the horizontal truss 2 from the vertical truss 1;

[0040] The laser cutting head switching assembly also includes:

[0041] A moving block 3 and a laser cutting head 22 mounted on the lower surface of the moving block 3. The two transverse trusses 2 are both mounted with moving blocks 3. The central axis of the transverse trusses 2 coincides with the Y axis. Under the control of the CNC system, the moving block 3 moves along the Y axis, and the laser cutting head 22 moves along the Z axis.

[0042] The driving part is used to drive the transverse truss 2 to move along the X-axis direction after the two ends of the transverse truss 2 are separated from the corresponding vertical trusses 1 respectively.

[0043] In this embodiment, before the laser cutting machine works, the two laser cutting heads 22 are checked. If the laser cutting head 22 is damaged, it is replaced. At this time, the two horizontal trusses 2 are fixed between the two vertical trusses 1 through the connecting part. When the operator puts the plate on the base, the CNC system controls the laser cutting head 22 on one of the moving blocks 3 to move to the appropriate position along the Z-axis direction, and controls the moving block 3 to move along the Y-axis direction, and controls the vertical truss 1 to move along the X-axis direction. In this way, after the laser cutting head 22 on the moving block 3 is started, the plate can be cut. If the laser cutting head 22 that is cutting is damaged during the cutting process, the CNC system immediately controls the laser cutting head on the other moving block 3 22 replaces the damaged laser cutting head 22 for subsequent cutting head, and then the connecting part on the transverse truss 2 where the damaged laser cutting head 22 is located separates the end of the transverse truss 2 from the vertical truss 1. At this time, the driving part is actuated to make the transverse truss 2 move to the safe area along the X-axis direction. After completion, the staff replaces the damaged laser cutting head 22, and then uses the driving part to make the transverse truss 2 move to the position where the vertical truss 1 is at this time, and then fixes the end of the transverse truss 2 to the vertical truss 1 through the connecting part. Through this device, when the laser cutting machine is cutting the plate, if the laser cutting head 22 is damaged, another laser cutting head 22 can be used to replace the damaged laser cutting head 22 in time for cutting, thereby improving the cutting efficiency of the laser cutting machine.

[0044] As an implementation method, Figure 1 , Figure 2 , Figure 3 , Figure 5 As shown, the driving part includes a driving assembly corresponding to the vertical truss 1, and the driving assembly includes:

[0045] A motor 4 is provided on one side of the base, a screw rod 5 having one end fixedly connected to the output shaft of the motor 4, and the other end of the screw rod 5 is rotatably connected to a fixed seat provided on the other side of the base, and the transverse truss 2 is provided with a rotating hole 10 penetrating the side surface thereof, and the screw rod 5 passes through the rotating holes 10 on the two transverse trusses 2;

[0046] An end hole 8 is provided on the end surface of the transverse truss 2, and the end hole 8 passes through the side wall of the rotating hole 10;

[0047] An arc plate 9 slidably connected to the end hole 8, the side of the arc plate 9 facing the rotating hole 10 is an arc surface, and the arc surface is provided with a first thread, and the side surface of the screw 5 is provided with a second thread, and the first thread matches the second thread;

[0048] A driving member for driving the arc-shaped plate 9 to move along the end surface hole 8.

[0049] In this embodiment, when the laser cutting head 22 is cutting, the connecting part fixes the transverse truss 2 between the vertical trusses 1. At this time, the arc surface of the arc plate 9 is away from the screw 5. When the laser cutting head 22 being cut is damaged, the connecting part first separates the end of the transverse truss 2 from the vertical truss 1, and then the driving part is actuated to make the arc plate 9 move in the direction of the screw 5, and finally make the first thread engage with the second thread. After completion, the motor 4 is started, thereby driving the transverse truss 2 away from the cutting area through the screw 5, and finally moving to a safe area. At this time, the staff can replace the laser cutting head 22.

[0050] Here, preferably, Figure 2 , Figure 3 As shown, the driving member is a cylinder 7, which is fixed to the end surface of the transverse truss 2 through a fixing member, and the output shaft of the cylinder 7 is fixed to the side of the arc plate 9 facing away from the rotating hole 10.

[0051] As an implementation method, Figure 2 , Figure 3 , Figure 6 As shown, the connecting portion includes:

[0052] Linkage rod 11, the two end faces of the vertical truss 1 perpendicular to the X-axis are both provided with side openings 6, the side openings 6 correspond to the ends of the transverse trusses 2, the inner side faces of the vertical trusses 1 are provided with linkage holes 12 corresponding to the side openings 6, the linkage holes 12 are close to the positions of the corresponding side openings 6, and the linkage rod 11 is slidably connected with the side openings 6;

[0053] A connecting rod 13, an insertion rod 15 having one end fixedly connected to the side surface of the connecting rod 13, an end of the linkage rod 11 located outside the linkage hole 12 is fixedly connected to the side surface of the connecting rod 13, a convex ring is provided at the end of the transverse truss 2, and a plug hole 16 is provided on the end surface of the convex ring facing the moving block 3, when the other end of the insertion rod 15 is inserted into the plug hole 16, the end of the vertical truss 1 is fixed in the side opening 6;

[0054] A linkage assembly for making the connecting rod 13 approach or move away from the vertical truss 1 .

[0055] In this embodiment, when the end of the transverse truss 2 moves into the side opening 6, the insertion rod 15 is opposite to the insertion hole 16. At this time, the linkage component is actuated to insert one end of the insertion rod 15 into the insertion hole 16. At this time, the end of the transverse truss 2 will be fixed in the side opening 6. When the linkage component causes the connecting rod 13 to move away from the vertical truss 1, the insertion rod 15 gradually disengages from the insertion hole 16, and finally the insertion rod 15 disengages from the insertion hole 16. At this time, under the action of the driving part, the transverse truss 2 can be moved away from the vertical truss 1.

[0056] As an implementation method, Figure 3 , Figure 4 As shown, the linkage component includes:

[0057] A push rod 18, an inner hole 19 is provided on the side of the arc plate 9 facing the insertion rod 15, a through groove 17 is provided on the side wall of the end hole 8 facing the inner hole 19, the through groove 17 penetrates the side surface of the cross truss 2, the push rod 18 is slidably connected with the inner hole 19, and the push rod 18 passes through the through groove 17, and the shortest distance between the side surface of the insertion rod 15 and the arc plate 9 is greater than the shortest distance between the end surface of the connecting rod 13 facing the arc plate 9 and the arc plate 9;

[0058] A linkage member for making the push rod 18 slide along the inner hole 19;

[0059] The spring 14 is sleeved on the linkage rod 11 , one end of the spring 14 is fixed to the side surface of the connecting rod 13 , and the other end of the spring 14 is fixed to the side surface of the vertical truss 1 .

[0060] In this embodiment, when the insertion rod 15 is inserted into the socket 16 at one end under the action of the spring 14, the horizontal truss 2 is fixed between the vertical trusses 1. When it is necessary to separate the insertion rod 15 from the socket 16, the linkage member first moves the push rod 18 to above the connecting rod 13, and then the cylinder 7 is started to move the push rod 18 to above the area between the vertical truss 1 and the connecting rod 13. After completion, the linkage member moves the push rod 18 to between the vertical truss 1 and the connecting rod 13, and then the cylinder 7 is started again to move the arc plate 9 toward the screw rod 5, thereby pushing the connection through the push rod 18, and then the insertion rod 15 gradually disengages from the socket 16. When the insertion rod 15 is completely disengaged from the socket 16, the first thread is also connected to the second thread, so that the horizontal truss 2 can be moved when the motor 4 is started.

[0061] As an implementation method, Figure 4As shown, the linkage member includes a first electromagnet 20 disposed at the top of the inner hole 19 and a second electromagnet 21 fixed inside the push rod 18. When the insertion rod 15 is inserted into the insertion hole 16 under the action of the spring 14, the horizontal truss 2 is fixed between the vertical trusses 1. When it is necessary to separate the insertion rod 15 from the insertion hole 16, the first electromagnet 20 and the second electromagnet 21 are energized to generate a force of attraction to each other, so that the push rod 18 moves to the top of the connecting rod 13, and then the cylinder 7 is started, so that the push rod 18 moves to the vertical truss 1. Above the area between the truss 1 and the connecting rod 13, the first electromagnet 20 and the second electromagnet 21 are energized to generate a mutually repelling force, so that the push rod 18 moves to between the vertical truss 1 and the connecting rod 13, and then the cylinder 7 is started again, so that the arc plate 9 moves in the direction of the screw 5, thereby pushing the connection through the push rod 18, and then the insertion rod 15 gradually disengages from the insertion hole 16. When the insertion rod 15 is completely disengaged from the insertion hole 16, the first thread is also connected to the second thread, so that the horizontal truss 2 can be moved when the motor 4 is started.

[0062] As an implementation method, Figure 7 As shown, the laser cutting head switching assembly also includes a protective cover 23, which is fixed to the lower surface of the moving block 3. The laser cutting head 22 is arranged in the protective cover 23, so that when one of the laser cutting heads 22 is working, it can protect the other laser cutting head 22.

[0063] Here, preferably, a water diversion channel is provided in the protective cover 23, the opening of the water diversion channel is located on the lower surface of the protective cover 23, and the water diversion channel is connected to the water supply system of the laser cutting machine. When the laser cutting head 22 is working, water is sprayed out from the opening of the water diversion channel, which also plays a role in protecting the other laser cutting head 22 that has not been started.

[0064] Those skilled in the art should understand that the discussion of any of the above embodiments is merely illustrative and is not intended to imply that the scope of the present invention (including the claims) is limited to these examples. Under the concept of the present invention, the technical features in the above embodiments or different embodiments may be combined, the steps may be implemented in any order, and there are many other variations of the different aspects of the present invention as described above, which are not provided in detail for the sake of simplicity.

[0065] The present invention is intended to cover all such substitutions, modifications and variations that fall within the broad scope of the appended claims. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A laser cutting head switching assembly of a laser cutting machine, comprising a base, a mobile truss arranged on the base, and a numerical control system arranged in the laser cutting machine, characterized in that: The mobile truss comprises two vertical trusses (1), two transverse trusses (2) and a connecting portion arranged at the end of the transverse trusses (2); the two vertical trusses (1) are arranged opposite to each other, the bottom end of the vertical trusses (1) is installed on a base, and the vertical trusses (1) move along the X-axis direction under the control of the numerical control system; when the transverse truss (2) is located between the two vertical trusses (1), the connecting portion is used to fix the end of the transverse truss (2) to the vertical truss (1) or to separate the end of the transverse truss (2) from the vertical truss (1); The laser cutting head switching assembly also includes: A moving block (3) and a laser cutting head (22) mounted on the lower surface of the moving block (3), wherein the moving block (3) is mounted on each of the two transverse trusses (2), the central axis of the transverse trusses (2) coincides with the Y-axis, and under the control of the numerical control system, the moving block (3) moves along the Y-axis direction, and the laser cutting head (22) moves along the Z-axis direction; A driving unit, the driving unit being used to drive the transverse truss (2) to move along the X-axis direction after the two ends of the transverse truss (2) are respectively separated from the corresponding vertical trusses (1); The driving part comprises a driving assembly corresponding to the vertical truss (1), and the driving assembly comprises: A motor (4) is arranged on one side of the base, a screw rod (5) having one end fixedly connected to the output shaft of the motor (4), the other end of the screw rod (5) being rotatably connected to a fixed seat arranged on the other side of the base, the transverse truss (2) being provided with a rotation hole (10) penetrating the side surface thereof, and the screw rod (5) passing through the rotation holes (10) on the two transverse trusses (2); An end hole (8) is provided on the end surface of the transverse truss (2), and the end hole (8) passes through the side wall of the rotating hole (10); An arc-shaped plate (9) slidably connected to the end hole (8), the side of the arc-shaped plate (9) facing the rotating hole (10) is an arc-shaped surface, and the arc-shaped surface is provided with a first thread, and the side surface of the screw rod (5) is provided with a second thread, and the first thread matches the second thread; A driving member used for driving the arc-shaped plate (9) to move along the end surface hole (8).

2. The laser cutting head switching assembly of a laser cutting machine according to claim 1, characterized in that: The driving member is a cylinder (7), which is fixed to the end surface of the transverse truss (2) through a fixing member, and the output shaft of the cylinder (7) is fixed to the side surface of the arc plate (9) facing away from the rotating hole (10).

3. The laser cutting head switching assembly of a laser cutting machine according to claim 2, characterized in that: The connecting portion comprises: A linkage rod (11), the two end faces of the vertical truss (1) perpendicular to the X-axis are both provided with side openings (6), the side openings (6) correspond to the ends of the transverse truss (2), the inner side face of the vertical truss (1) is provided with linkage holes (12) corresponding to the side openings (6), the linkage holes (12) are close to the positions of the corresponding side openings (6), and the linkage rod (11) is slidably connected to the side openings (6); A connecting rod (13), an insertion rod (15) having one end fixedly connected to the side surface of the connecting rod (13), an end of the linkage rod (11) located outside the linkage hole (12) being fixedly connected to the side surface of the connecting rod (13), an end of the transverse truss (2) being provided with a convex ring, an end surface of the convex ring facing the moving block (3) being provided with an insertion hole (16), and when the other end of the insertion rod (15) is inserted into the insertion hole (16), the end of the vertical truss (1) is fixed in the side opening (6); A linkage assembly for moving a connecting rod (13) closer to or farther away from a vertical truss (1).

4. The laser cutting head switching assembly of a laser cutting machine according to claim 3, characterized in that: The linkage components include: A push rod (18), an inner hole (19) is provided on the side of the arc-shaped plate (9) facing the insertion rod (15), a through groove (17) is provided on the side wall of the end hole (8) facing the inner hole (19), the through groove (17) penetrates the side surface of the transverse truss (2), the push rod (18) is slidably connected with the inner hole (19), and the push rod (18) passes through the through groove (17), and the shortest distance between the side surface of the insertion rod (15) and the arc-shaped plate (9) is greater than the shortest distance between the end surface of the connecting rod (13) facing the arc-shaped plate (9) and the arc-shaped plate (9); A linkage member for making the push rod (18) slide along the inner hole (19); A spring (14) is sleeved on the linkage rod (11), one end of the spring (14) is fixed to the side surface of the connecting rod (13), and the other end of the spring (14) is fixed to the side surface of the vertical truss (1).

5. The laser cutting head switching assembly of a laser cutting machine according to claim 4, characterized in that: The linkage member comprises a first electromagnet (20) arranged at the top of the inner hole (19) and a second electromagnet (21) fixed inside the push rod (18).

6. The laser cutting head switching assembly of a laser cutting machine according to claim 5, characterized in that: The laser cutting head switching assembly further comprises a protective cover (23), wherein the protective cover (23) is fixed to the lower surface of the moving block (3), and the laser cutting head (22) is arranged in the protective cover (23).

7. The laser cutting head switching assembly of a laser cutting machine according to claim 6, characterized in that: A water diversion channel is provided in the protective cover (23), the opening of the water diversion channel is located on the lower surface of the protective cover (23), and the water diversion channel is connected to the water supply system of the laser cutting machine.

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