Negative pressure connecting device and laser processing equipment

Abstract

The utility model discloses a negative pressure connecting device and laser processing equipment, the negative pressure connecting device comprises a first connecting piece, a second connecting piece and a positioning assembly, and the first connecting piece and the second connecting piece are both provided with light through holes for laser to pass through; when the first connecting piece and the second connecting piece are in butt joint, the two sides close to each other are butt joint sides. An adsorption area located outside the light through hole is constructed on the butt joint side, and the adsorption area is used for enabling the first connecting piece and the second connecting piece to be tightly attached when negative pressure is constructed in the adsorption area; the positioning assembly is arranged on the first connecting piece and the second connecting piece and used for enabling the first connecting piece and the second connecting piece to be in butt joint in a set posture. The negative pressure connecting device can be used for connecting the cutting nozzle of the laser processing equipment and the optical module above the cutting nozzle, even if the cutting nozzle collides with a workpiece, when the collision force is larger than the adsorption force between the first connecting piece and the second connecting piece, the cutting nozzle is separated from the optical module, and damage to the cutting nozzle caused by collision is avoided.

Description

Technical Field

[0001] The present application relates to the field of laser processing, and in particular to a negative pressure connection device and laser processing equipment. Background Art

[0002] There are many types of laser processing equipment, including laser cutting machines and laser welding machines. In laser cutting equipment, capacitive sensors are often used to sense the distance between the cutting nozzle and the workpiece being cut, and collisions are avoided by controlling the Z-axis of the machine tool. Due to the capacitive sensing characteristics of different materials, the irregular shape of the workpiece being cut, the reaction speed of the mechanism, and manual misoperation, collisions between the cutting nozzle and the workpiece are inevitable in actual work. The laser head has a more complex sealed optical path, air path, and electronic control module, and the cutting nozzle and the laser head are generally rigidly connected. When the drive device inside the laser cutting machine drives the laser head and the cutting nozzle to move, the above-mentioned collision occurs. The collision force between the cutting nozzle and the workpiece can easily cause varying degrees of damage to the laser cutting nozzle and the laser. Utility Model Content

[0003] The present application proposes a negative pressure connection device and a laser processing device, aiming to solve the problem that the current laser cutting nozzle is easily damaged by collision.

[0004] The present application proposes a negative pressure connection device, comprising:

[0005] A first connecting member having a first through hole at its center;

[0006] A second connecting member, wherein a second through hole corresponding to the first through hole is provided at the center thereof, and the second connecting member is used for docking with the first connecting member; two sides close to each other when the first connecting member and the second connecting member are docking sides; an adsorption area is constructed on the docking side, and when a negative pressure is constructed inside the adsorption area, the adsorption area is used for making the first connecting member and the second connecting member close to each other;

[0007] The positioning assembly is arranged on the first connecting member and the second connecting member, and is used to make the first connecting member and the second connecting member dock with each other in a set posture.

[0008] In some embodiments, the negative pressure connection device further comprises two sealing rings arranged on any of the docking sides, or two sealing rings arranged in one-to-one correspondence with the two docking sides;

[0009] When the first connecting member is docked with the second connecting member, the axial projection of one of the sealing rings is located inside the other sealing ring, and the area between the two sealing rings constitutes the adsorption area. The first connecting member and / or the second connecting member are also provided with an exhaust hole located in the adsorption area.

[0010] In some embodiments, a suction cup is disposed on the first connecting member, and the suction cup is disposed toward the second connecting member. The area where the suction cup is located and the area where the second connecting member and the suction cup are docked constitute the adsorption area.

[0011] In some embodiments, the positioning assembly includes an annular protrusion arranged on the edge of the second through hole, the annular protrusion is used to be plugged into the first through hole, and the inner wall of the first through hole and the annular protrusion docking is configured as an outward-expanding conical surface or arc surface.

[0012] In some embodiments, the positioning assembly also includes a limiting protrusion provided on the second connecting member, and the first connecting member is also provided with a limiting hole adapted to the limiting protrusion, and the outer surface of the limiting protrusion docking with the limiting hole includes a spherical surface, an arc surface or a conical surface.

[0013] In some embodiments, the negative pressure connection device further comprises:

[0014] An electrode seat, disposed on the docking side and elastically connected to the first connecting member;

[0015] A first electrode is disposed on the electrode seat;

[0016] The second electrode is arranged on the second connecting member and is used for connecting with the first electrode.

[0017] In some embodiments, the negative pressure connection device also includes a first connection hole provided on the first connection member, and a second connection hole provided on the second connection member; the first connection hole is arranged around the first through hole, and the second connection hole is arranged around the second through hole.

[0018] In some embodiments, the negative pressure connection device further comprises a flexible dust cover, one end of the flexible dust cover is sleeved on the outer periphery of the first connection piece, and the other end of the flexible dust cover is sleeved on the outer periphery of the second connection piece.

[0019] In some embodiments, the negative pressure connection device further includes a third connection member connecting the first connection member and the second connection member, and the third connection member includes a chain and a spring.

[0020] The present application also proposes a laser processing equipment, including the above-mentioned negative pressure connection device, the laser processing equipment also includes a laser processing head and a driving device, and the negative pressure connection device is used to connect the laser processing head and the driving device.

[0021] The negative pressure connection device in the present application includes a first connection member, a second connection member and a positioning assembly, wherein the centers of the first connection member and the second connection member are both provided with a light-through hole for the laser to pass through; the second connection member is used to dock with the first connection member; the two sides close to each other when the first connection member and the second connection member are docked are docking sides; an adsorption area outside the light-through hole is constructed on the docking side, and the adsorption area is used to make the first connection member and the second connection member close to each other when negative pressure is constructed inside; the positioning assembly is provided on the first connection member and the second connection member, and is used to make the first connection member and the second connection member dock in a set posture. Thus, the negative pressure connection device can be used to connect the cutting nozzle of the laser processing equipment and the optical module above it, and even if the cutting nozzle collides with the workpiece, when the collision force is greater than the adsorption force between the first connection member and the second connection member, the cutting nozzle and the optical module are separated to avoid damage to the cutting nozzle caused by the collision, and also to avoid the collision force from being transmitted to the laser head above, thereby causing damage to the laser head. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is a schematic diagram of the structure of a negative pressure connection device in one embodiment of the present application;

[0023] Figure 2 for Figure 1 A schematic structural diagram of the negative pressure connection device from another perspective in the embodiment;

[0024] Figure 3 It is a cross-sectional view of a negative pressure connection device in one embodiment of the present application;

[0025] Figure 4 A cross-sectional view of another cross section of the negative pressure connection device in one embodiment of the present application;

[0026] Figure 5 for Figure 1 A schematic diagram of the structure of the electrode holder in the embodiment;

[0027] Figure 6 It is a structural schematic diagram of the laser processing equipment in one embodiment of the present application.

[0028] Description of labels:

[0029] 11. first connecting member; 12. cover plate; 13. electrode holder; 14. first through hole; 15. limiting hole; 16. first connecting hole;

[0030] 21. second connecting member; 22. suction cup; 23. limiting protrusion; 24. second electrode; 25. joint; 26. annular protrusion; 27. second through hole; 28. second connecting hole; 29. ​​sealing ring;

[0031] 31. Cutting nozzle; 32. Machine head; 33. Driving device.

[0032] The purpose, features and advantages of this application will be further described in conjunction with the embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0033] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the scheme in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments in the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0034] It should be noted that all directional indications such as up, down, left, right, front, back... in the embodiments of the present application are only used to explain the relative position relationship, movement status, etc. between the components in a certain specific posture as shown in the accompanying drawings. If the specific posture changes, the directional indication will also change accordingly.

[0035] It should also be noted that when an element is referred to as being "fixed on" or "disposed on" another element, it may be directly on the other element or there may be an intermediate element at the same time. When an element is referred to as being "connected to" another element, it may be directly connected to the other element or there may be an intermediate element at the same time.

[0036] In addition, the descriptions of "first", "second", etc. in the embodiments of the present application are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in the field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by this application.

[0037] The present application embodiment provides a negative pressure connection device, referring to Figures 1 to 6 The negative pressure connection device includes: a first connection member 11, a first through hole 14 is arranged at the center; a second connection member 21, a second through hole 27 corresponding to the first through hole 14 is arranged at the center, and the second connection member 21 is used to dock with the first connection member 11; the two sides close to each other when the first connection member 11 and the second connection member 21 are docked are docking sides; an adsorption area is constructed on the docking side, and when a negative pressure is constructed inside the adsorption area, the adsorption area is used to make the first connection member 11 and the second connection member 21 close to each other; a positioning component is arranged on the first connection member 11 and the second connection member 21, and is used to make the first connection member 11 and the second connection member 21 dock in a set posture.

[0038] The negative pressure connection device in the embodiment of the present application includes a first connection member 11, a second connection member 21 and a positioning assembly. The first connection member 11 and the second connection member 21 are both provided with light-through holes in the center for laser passage; the second connection member 21 is used to dock with the first connection member 11; the two sides close to each other when the first connection member 11 and the second connection member 21 are docked are docking sides; an adsorption area located outside the light-through hole is constructed on the docking side, and the adsorption area is used to make the first connection member 11 and the second connection member 21 close to each other when negative pressure is constructed inside; the positioning assembly is provided on the first connection member 11 and the second connection member 21, and is used to make the first connection member 11 and the second connection member 21 dock in a set posture. Thus, the negative pressure connection device can be used to connect the cutting nozzle 31 of the laser processing equipment and the optical module above it. Even if the cutting nozzle 31 collides with the workpiece, when the collision force is greater than the adsorption force between the first connecting member 11 and the second connecting member 21, the cutting nozzle 31 will be separated from the optical module to avoid damage to the cutting nozzle 31 caused by the collision. At the same time, it also avoids the large collision force being transmitted to the laser head above due to the rigid connection, which may also cause damage to the laser head.

[0039] It is worth noting that the negative pressure connection device in this embodiment can be used to connect the cutting nozzle 31 with the head 32 with the optical module, and can also be used to connect the head 32 with the driving device 33 of the laser cutting machine. Of course, the negative pressure connection device can also be used in laser welding equipment to connect the welding head with the head 32, or to connect the head 32 with the driving device 33. The above-mentioned driving device 33 can be a multi-axis mechanical arm, or a three-axis orthogonal driving module, etc., which is mainly used to drive the movement of the head 32. The connection method between the two connecting parts and the head 32 and the cutting nozzle 31 can be screw connection, or it can be clamping, etc., and the specific connection method is not limited in this embodiment.

[0040] In some embodiments, reference Figures 1 to 6, the negative pressure connection device includes two sealing rings 29 arranged on any docking side, or two sealing rings 29 arranged one by one corresponding to the two docking sides. When the first connector 11 is docked with the second connector 21, one of the sealing rings 29 is located inside the other sealing ring 29 along the axial projection, and the area between the two sealing rings 29 constitutes an adsorption area. The first connector 11 and / or the second connector 21 is also provided with an air extraction hole located in the adsorption area. In this embodiment, the two sealing rings 29 are respectively a first sealing ring and a second sealing ring. Among them, the first sealing ring can be arranged on the outer periphery of the first through hole 14, and the second sealing ring is arranged on the outer periphery of the second through hole 27. When the first connector 11 is docked with the second connector 21, the two sealing rings 29 are squeezed and sealed, and the annular area between the two constitutes an adsorption area. The two sealing rings 29 can be arranged on the same connector, or they can be arranged on the first connector 11 and the second connector 21 separately. The air holes can be set on one of the connecting parts, or on both connecting parts. The air holes are connected to the adsorption area. The adsorption area is evacuated through the air holes by an external vacuum pump to form negative pressure inside so that the two connecting parts fit together after docking and do not fall off easily.

[0041] In the above embodiment, a sealed adsorption area is constructed by two sealing rings. In addition, a suction cup 22 can be set on one of the connectors to achieve adsorption connection with the other connector. Specifically, a suction cup 22 can be set on the second connector 21, and the suction cup 22 is set toward the first connector 11. The suction cup 22 and the area where the second connector 21 and the suction cup 22 are connected constitute the adsorption area. The above-mentioned suction cup 22 can be set in multiples and arranged around the second through hole 27. A countersunk hole is set at one end of the air hole of the second connector 21 facing the first connector 11, and the suction cup 22 can be set in the countersunk hole, and the suction cup 22 is connected to the air hole. After the two connectors are docked, the adsorption end of the suction cup 22 contacts the first connector 11 and a certain extrusion shape is formed to stick to the first connector 11. A joint 25 is set at the end of the air hole away from the first connector 11, and the joint 25 is used to connect with an external vacuum pump. When the vacuum pump sucks air, a negative pressure can be constructed in the suction cup 22 to make the adsorption end adsorb the first connector 11.

[0042] In some embodiments, reference Figures 1 to 6The positioning assembly includes an annular protrusion 26 disposed on the edge of the second through hole 27, and the annular protrusion 26 is used to be plugged with the first through hole 14. The inner wall of the first through hole 14 and the annular protrusion 26 are arranged to be an outward-expanded conical surface or an arc surface. In this embodiment, the cooperation between the annular protrusion 26 and the first through hole 14 can be limited after the two connectors are docked. Setting the inner wall of the first through hole 14 as a conical surface or an arc surface can facilitate the smooth separation of the first connector 11 or the second connector 21 after being subjected to a certain amount of external force. It is worth noting that the above-mentioned annular protrusion 26 can be a regular circle, or a square ring or an elliptical ring. The shapes of the latter two can completely limit the two connectors. The two connectors will not rotate or move after docking. The cooperation between the annular protrusion 26 and the first through hole 14 may isolate the optical path from the outside to a certain extent, thereby improving the dustproof level of the optical path.

[0043] Further references Figure 3 , when the first connector 11 is docked with the second connector 21, the first sealing ring and the second sealing ring are spaced apart along the axial direction, and the adsorption area includes a cavity constructed by the first sealing ring, the second sealing ring, the first connector 11 and the second connector 21, and the air extraction hole is connected to the cavity. In this embodiment, the first sealing ring and the second sealing ring may not be arranged on the same plane. One of the sealing rings 29 is arranged on the docking side of the second connector 21, and in the area close to the edge of the outer periphery of the second connector 21, and the other sealing ring may be arranged on the outer wall of the annular protrusion 26 or the inner wall of the first through hole 14. At this time, the two sealing rings are arranged along the axial direction. After the two connectors are docked, a sealed cavity can be constructed with the two sealing rings. The external vacuum pump is connected to the cavity through the air hole, and air is extracted to construct a negative pressure.

[0044] It is worth noting that when the above-mentioned annular protrusion 26 is set to be circular, further limiting is required to prevent rotation between the two connecting members. Specifically, the positioning assembly also includes a limiting protrusion 23 provided on the second connecting member 21, and the first connecting member 11 is also provided with a limiting hole 15 adapted to the limiting protrusion 23, and the outer surface of the limiting protrusion 23 and the limiting hole 15 connected to each other includes a spherical surface, an arc surface or a conical surface. The spherical surface, arc surface or conical surface of the outer surface of the limiting protrusion 23 in this embodiment is also convenient for the smooth separation of the two connecting members after being subjected to a certain external force. Of course, two spaced limiting protrusions 23 can also be set to completely limit the two connecting members, thereby eliminating the need to set the above-mentioned annular protrusion 26. Of course, the specific limiting scheme is set according to actual needs.

[0045] In some embodiments, reference Figures 1 to 6, the negative pressure connection device also includes: an electrode seat 13, which is arranged on the docking side and elastically connected to the first connector 11; a first electrode, which is arranged on the electrode seat 13; and a second electrode 24, which is arranged on the second connector 21 and is used to dock with the first electrode. Specifically, a groove can be set on the side of the first connector 11 away from the docking side to install the electrode seat 13, and a through hole for the electrode to pass through is set in the groove. A cover plate 12 is set at the opening of the groove, and the cover plate 12 and the electrode seat 13 are connected by a spring so that the first electrode and the second electrode 24 can be elastically docked. The first electrode and the second electrode 24 need to avoid the above-mentioned adsorption area, and multiple first electrode seats 13 can also be arranged around the first through hole 14 in the middle of the first connector 11. This can be used to detect the docking of the two connectors at various locations in the circumferential direction. The first electrode and the second electrode 24 are connected to the external circuit. After the two are in contact, the circuit is connected and the voltage inside it will change, which is used as a basis for judging whether the two connectors are completely docked. Of course, after the two connectors are docked, if a collision occurs and they are separated, the circuit will also change in voltage, which can also be used as a basis for judging whether the two connectors are separated. When any pair of the first electrode and the second electrode 24 is disconnected, the laser processing equipment can immediately control the machine head 32 to stop moving, so as to avoid further damage to the equipment.

[0046] In some embodiments, reference Figures 1 to 6 , the negative pressure connection device also includes a first connection hole 16 provided on the first connection member 11, and a second connection hole 28 provided on the second connection member 21; the first connection hole 16 is provided around the first through hole 14, and the second connection hole 28 is provided around the second through hole 27. In this embodiment, the first connection hole 16 and the second connection hole 28 can be provided with screws for threaded connection with external components. The first connection hole 16 and the second connection hole 28 need to be provided with a countersunk hole for accommodating the screw head at one end close to the docking side. At this time, the two connection members are similar to flanges. In addition, the first connection hole 16 and the second connection hole 28 need to be provided away from the light-through hole and the adsorption area. When the suction cup adsorption solution is adopted, the above-mentioned connection hole is spaced from the suction cup 22 to avoid the adsorption area. Of course, the connection hole can also be provided in the adsorption area. Of course, a corresponding sealing gasket needs to be provided in the connection hole. Specifically, a sealing ring sleeved on the screw can be provided at the first connection hole 16 and the second connection hole. When the screw head squeezes the sealing ring and the peripheral area of ​​the connection hole, the connection hole is sealed.

[0047] In some embodiments, reference Figures 1 to 6, the negative pressure connection device also includes a flexible dust cover, one end of which is sleeved on the outer periphery of the first connecting member 11, and the other end is sleeved on the outer periphery of the second connecting member 21. The dust cover can be a tubular member made of flexible material, such as a bellows or a rubber tube. The two ends of the dust cover can be fixed to the outer periphery of the connecting member by a clamp. In this way, the optical path and the air path can be isolated from the outside to prevent dust from entering and polluting the optical path. When the two connecting members are detached by collision, the dust cover can also keep the two connecting members in a connected state to prevent the parts connected thereto from falling on the machine. Of course, a spring can also be set between the first connecting member 11 and the second connecting member 21. When the cutting nozzle 31 collides, the cutting nozzle 31 will swing with the detachment of one of the connecting members and will not fall. After the cutting nozzle 31 is away from the workpiece, it will automatically return to the right position under the tension of the tension spring. A cable chain can also be set between the first connecting member 11 and the second connecting member 21. The function of the cable chain is similar to that of the spring and also has the effect of preventing falling.

[0048] This application also proposes a laser processing device, referring to Figures 1 to 6 , the laser processing equipment includes the above-mentioned negative pressure connecting device, the laser processing equipment also includes a laser processing head and a driving device 33, and the negative pressure connecting device is used to connect the laser processing head and the driving device 33. The negative pressure connecting device in this embodiment can be used to connect the cutting nozzle 31 with the head 32 (laser head) with an optical module, and can also be used to connect the head 32 with the driving device 33 of the laser cutting machine. Of course, the negative pressure connecting device can also be used in laser welding equipment to connect the welding head and the head 32, or to connect the head 32 with the driving device 33. The above-mentioned driving device 33 can be a multi-axis robotic arm, or a three-axis orthogonal driving module, etc., which is mainly used to drive the head 32 to move. Of course, the laser processing equipment also includes an exhaust pump connected to the adsorption area, and the exhaust pump is used to build negative pressure in the adsorption area.

[0049] The working principle of the negative pressure connection device in the embodiment of the present application:

[0050] The negative pressure connection device includes a first connection member 11, a second connection member 21 and a positioning assembly. The first connection member 11 and the second connection member 21 are both provided with a light hole in the center for laser to pass through; the second connection member 21 is used to dock with the first connection member 11; the two sides close to each other when the first connection member 11 and the second connection member 21 are docking sides; the docking side is constructed with an adsorption area located outside the light hole, and the adsorption area is used to make the first connection member 11 and the second connection member 21 close to each other when negative pressure is built inside; the positioning assembly is provided on the first connection member 11 and the second connection member 21, and is used to make the first connection member 11 and the second connection member 21 dock in a set posture. Thus, the negative pressure connection device can be used to connect the cutting nozzle 31 of the laser processing equipment and the optical module above it. Even if the cutting nozzle 31 collides with the workpiece, when the collision force is greater than the adsorption force between the first connection member 11 and the second connection member 21, the cutting nozzle 31 is separated from the optical module to avoid damage to the cutting nozzle 31 caused by the collision.

[0051] The above are only partial or preferred embodiments of the present application. Neither the text nor the drawings can limit the scope of protection of the present application. All equivalent structural changes made using the contents of the present application specification and drawings under the overall concept of the present application, or direct / indirect application in other related technical fields are included in the scope of protection of the present application.

Claims

1. A negative pressure connection device, characterized in that: include: A first connecting member having a first through hole at its center; A second connecting member, wherein a second through hole corresponding to the first through hole is provided at the center thereof, and the second connecting member is used for docking with the first connecting member; two sides close to each other when the first connecting member and the second connecting member are docking sides; an adsorption area is constructed on the docking side, and when a negative pressure is constructed inside the adsorption area, the adsorption area is used for making the first connecting member and the second connecting member close to each other; The positioning assembly is arranged on the first connecting member and the second connecting member, and is used to make the first connecting member and the second connecting member dock with each other in a set posture.

2. The negative pressure connection device according to claim 1, characterized in that: The negative pressure connection device further comprises two sealing rings arranged on any of the butt joint sides, or two sealing rings arranged in one-to-one correspondence with the two butt joint sides; When the first connecting member is docked with the second connecting member, the axial projection of one of the sealing rings is located inside the other sealing ring, and the area between the two sealing rings constitutes the adsorption area. The first connecting member and / or the second connecting member are also provided with an exhaust hole located in the adsorption area.

3. The negative pressure connection device according to claim 1, characterized in that: A suction cup is arranged on the first connecting member, and the suction cup is arranged toward the second connecting member. The area where the suction cup is located and the area where the second connecting member and the suction cup are connected constitute the adsorption area.

4. The negative pressure connection device according to claim 1, characterized in that: The positioning assembly includes an annular protrusion arranged on the edge of the second through hole, the annular protrusion is used to be plugged into the first through hole, and the inner wall of the first through hole and the annular protrusion docking is configured to be an outwardly expanded conical surface or arc surface.

5. The negative pressure connection device according to claim 4, characterized in that: The positioning assembly also includes a limiting protrusion arranged on the second connecting member, and the first connecting member is also provided with a limiting hole adapted to the limiting protrusion, and the outer surface of the limiting protrusion docking with the limiting hole includes a spherical surface, an arc surface or a conical surface.

6. The negative pressure connection device according to claim 1, characterized in that: The negative pressure connection device also includes: An electrode seat, disposed on the docking side and elastically connected to the first connecting member; A first electrode is disposed on the electrode seat; The second electrode is arranged on the second connecting member and is used for connecting with the first electrode.

7. The negative pressure connection device according to claim 1, characterized in that: The negative pressure connection device further includes a first connection hole provided on the first connection member, and a second connection hole provided on the second connection member; the first connection hole is provided around the first through hole, and the second connection hole is provided around the second through hole.

8. The negative pressure connection device according to claim 1, characterized in that: The negative pressure connection device further comprises a flexible dust cover, one end of which is sleeved on the outer periphery of the first connection piece, and the other end of which is sleeved on the outer periphery of the second connection piece.

9. The negative pressure connection device according to claim 1, characterized in that: The negative pressure connection device further comprises a third connection member connecting the first connection member and the second connection member, wherein the third connection member comprises a cable chain and a spring.

10. A laser processing device, characterized in that: It comprises the negative pressure connection device according to any one of claims 1 to 9, the laser processing equipment further comprises a laser processing head and a driving device, and the negative pressure connection device is used to connect the laser processing head and the driving device.

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