Laser cutting head and laser cutting machine

Abstract

The utility model belongs to the technical field of laser cutting, and discloses a laser cutting head and a laser cutting machine, the laser cutting head comprises a cutting head body and a protection disc, the protection disc is annularly arranged, the protection disc is sleeved outside the cutting head body, the protection disc is connected to the cutting head body, and the outer ring of the protection disc extends out of the cutting head body. The protection disc enables the outer ring of the protection disc to make contact with an obstacle in advance in the moving process of the cutting head body. The laser cutting machine comprises a laser cutting head. According to the laser cutting head, the protection disc protruding out of the cutting head body is arranged outside the cutting head body, when the cutting head body moves, the protection disc makes contact with an obstacle in advance, the protection disc can be used for absorbing impact force generated by collision in advance, and therefore the effect of protecting the cutting head body is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of laser cutting, in particular to a laser cutting head and a laser cutting machine. Background Art

[0002] Laser cutting is a process in which a laser beam is emitted from a laser, and the optical path system at the bottom of the laser is focused into a high-power density laser beam. Then, the laser cutting head installed at the bottom of the optical path system focuses the laser beam onto the cutting material, so that the workpiece reaches the melting point or boiling point. At the same time, the high-pressure gas coaxial with the beam blows away the molten or vaporized metal. As the relative position of the beam and the workpiece moves, the material is eventually cut, thereby achieving the purpose of cutting. Laser cutting has the characteristics of high precision, fast cutting, smooth incision, and low processing cost, and will gradually improve or replace traditional metal cutting process equipment.

[0003] Currently, the laser cutting head needs to move along the cutting path during the process of cutting the workpiece. If there is an obstacle in front of the moving path of the laser cutting head, such as a plate that is lifted up due to the plate's own gravity, cutting temperature difference, internal stress of the material, improper adjustment of laser parameters, etc., the laser cutting head will collide with the plate, causing deformation or damage to the laser cutting head. Utility Model Content

[0004] The utility model aims to provide a laser cutting head and a laser cutting machine, so as to protect the cutting head during its operation.

[0005] To achieve this purpose, the utility model adopts the following technical solutions:

[0006] The laser cutting head comprises a cutting head body, and the laser cutting head further comprises:

[0007] The protective plate is arranged in an annular shape, and the protective plate is sleeved on the outside of the cutting head body. The protective plate is connected to the cutting head body, and the outer ring of the protective plate extends out of the cutting head body. The protective plate can make the outer ring of the protective plate contact obstacles in advance during the movement of the cutting head body.

[0008] Preferably, a mounting plane is provided on the cutting head body, and the protective plate is connected to the mounting plane.

[0009] Preferably, the protective disk is a circular ring, and the protective disk is coaxially arranged with the cutting head body.

[0010] Preferably, the protective plate is detachably connected to the cutting head body.

[0011] Preferably, the protective plate is detachably connected to the cutting head body via bolts, and a plurality of the bolts are arranged along the circumferential direction of the protective plate.

[0012] Preferably, the protective plate is made of metal, and can be deformed when colliding with the obstacle.

[0013] Preferably, the protection plate is made of a conductive metal material, and a passage can be formed between the protection plate and the conductive obstacle.

[0014] Preferably, the thickness of the protective plate is 1-3 mm.

[0015] Preferably, the outer edge of the protective disk is provided with arc fillets.

[0016] A laser cutting machine, comprising a laser cutting head.

[0017] Beneficial effects of the utility model:

[0018] The laser cutting head of the utility model is provided with a protective plate on the outside of the cutting head body, so that when the cutting head body is moving, the protective plate protruding from the cutting head body can contact obstacles in advance. The obstacles, such as the lifted workpieces, can use the protective plate to absorb the impact force generated by the collision in advance, thereby achieving the effect of protecting the cutting head body.

[0019] The laser cutting machine of the utility model is equipped with a cutting head body with a protective plate, so that during the movement of the cutting head body, the protective plate can protect the cutting head body. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a structural schematic diagram of the laser cutting head of the utility model;

[0021] Figure 2 It is a structural schematic diagram of the cutting head body of the utility model;

[0022] Figure 3 yes Figure 1 Enlarged view of point A in the middle.

[0023] In the figure:

[0024] 1. Cutting head body; 11. Mounting plane; 2. Protective plate; 21. Arc fillet; 3. Bolts; 4. Nozzle. DETAILED DESCRIPTION

[0025] The present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the present invention, rather than to limit the present invention. It should also be noted that, for ease of description, only the parts related to the present invention, rather than all structures, are shown in the accompanying drawings.

[0026] In the description of the present invention, unless otherwise clearly specified and limited, the terms "connected", "connected", and "fixed" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0027] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0028] In the description of this embodiment, the terms "upper", "lower", "right", etc., are based on the directions or positions shown in the drawings, and are only for the convenience of description and simplified operation, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation of the present invention. In addition, the terms "first" and "second" are only used to distinguish in the description and have no special meaning.

[0029] Refer to the following Figures 1 to 3 The laser cutting head and the laser cutting machine provided by the utility model are described.

[0030] The laser cutting machine includes a machine tool host, a laser and a laser cutting head. The machine tool host is equipped with a built-in controller. The laser is connected to the machine tool host. The machine tool host can drive the laser to realize the movement of X, Y and Z axes. The specific structures of the machine tool host and the laser are existing technologies and will not be repeated here. The laser cutting head is connected to the bottom of the laser.

[0031] When the laser cutting machine is working, a high-power density laser beam is emitted through the laser. The bottom of the laser has its own optical path system, which can focus the laser into a high-power density laser beam. The laser beam is irradiated to the surface of the workpiece through the laser cutting head, so that the workpiece reaches the melting point or boiling point. At the same time, the high-pressure gas coaxial with the beam blows away the molten or vaporized metal. Finally, in the process of the laser moving relative to the workpiece, the material forms a slit, thereby achieving the purpose of cutting. Laser cutting processing replaces the traditional mechanical knife with an invisible beam, and has the characteristics of high precision, fast cutting, no limitation on cutting pattern, automatic typesetting to save materials, smooth incision, and low processing cost.

[0032] When the laser cutting head in the prior art is cutting a plate, if an obstacle appears in front of the moving path of the laser cutting head, such as a plate that is tilted due to its own gravity, the laser cutting head will collide with the plate when moving, causing the laser cutting head to be deformed or damaged. Therefore, in order to protect the laser cutting head, this embodiment provides a laser cutting head. For the exemplary structure of the laser cutting head, please refer to the following content of this embodiment.

[0033] The laser cutting head includes a cutting head body 1 and a protective plate 2. Specifically, a nozzle 4 is connected to the bottom end of the cutting head body 1. A mounting plane 11 is arranged on the cutting head body 1. The mounting plane 11 is arranged in a ring shape. The mounting plane 11 provides a stable mounting base for the protective plate 2. The surface of the mounting plane 11 is perpendicular to the axis of the cutting head body 1. The protective plate 2 is connected to the mounting plane 11.

[0034] The protective plate 2 is arranged in a ring shape, and the protective plate 2 is sleeved on the outside of the cutting head body 1. The outer ring of the protective plate 2 extends out of the cutting head body 1, that is, the outer ring of the protective plate 2 protrudes out of the outside of the cutting head body 1, so that when the cutting head body 1 moves to cut the workpiece, the outer ring of the protective plate 2 contacts the obstacle in advance. The obstacle in this embodiment is illustrated by taking the raised workpiece as an example, so that the protective plate 2 can protect the cutting head body 1 and the nozzle 4.

[0035] Specifically, the protective disk 2 in this embodiment is a circular ring, and the protective disk 2 is coaxially arranged with the cutting head body 1. The outer ring edge of the protective disk 2 is provided with an arc fillet 21, and the corners of the protective disk 2 are processed into a chamfered shape, and the two planes are connected with an arc curve, thereby reducing the sharp right-angled part, thereby preventing the outer ring edge of the protective disk 2 from scratching the staff, making it safer for the staff to touch the protective disk 2 when performing operations such as picking up workpieces. In addition, the inner ring edge of the protective disk 2 is also provided with an arc fillet 21, which not only makes the protective disk 2 more beautiful as a whole, but also the chamfering process can eliminate the sharp angles of the corners of the protective disk 2, and the transition is into a smooth process, thereby reducing stress concentration and preventing the generation of cracks. Optionally, in other embodiments, the protective disk 2 can also be a polygonal ring, such as a square ring or a hexagonal ring.

[0036] The protective plate 2 in this embodiment is made of conductive metal material, such as iron, copper and aluminum. In this embodiment, iron is used as an example. When the protective plate 2 collides with the workpiece, the metal protective plate 2 can produce plastic deformation, so that the energy of the collision is converted into strain energy of the material, thereby consuming and absorbing the energy of the collision to protect the cutting head body 1 and the nozzle 4.

[0037] In addition, since the protective disk 2 is conductive, the protective disk 2 and the metal grille of the machine tool host can be electrically connected to the controller of the laser cutting machine, and the voltage needs to be controlled within a range that does not cause harm to the human body. The electrical connection between the controller and the metal grille is achieved, thereby achieving electrical connection between the controller and the workpiece. When the conductive protective disk 2 contacts the conductive workpiece (steel plate, iron plate, etc.), a short circuit is formed between the protective disk 2 and the workpiece, so that the controller can obtain an electrical signal and immediately control the cutting head body 1 to stop moving, thereby achieving active protection of the cutting head body 1, and passively protecting the cutting head body 1 and the nozzle 4 in conjunction with the plastic deformation of the protective disk 2 itself, and finally having a good protective effect on the cutting head body 1 and the nozzle 4, greatly reducing the possibility of damage to the cutting head body 1 and the nozzle 4.

[0038] In addition, the thickness of the protective plate 2 is 1-3 mm, and preferably 1.5 mm in the present embodiment, which not only ensures the strength of the protective plate 2 itself and ensures that the protective plate 2 is not easily deformed during normal operation, but also has a certain plastic deformation ability when the protective plate 2 collides with the workpiece, and can absorb the impact force generated by the collision through its own plastic deformation.

[0039] Optionally, in other embodiments, the protection plate 2 may also be made of a material with a certain flexibility such as plastic or rubber, so as to absorb part of the impact force generated by the collision through the elastic deformation of the protection plate 2 itself.

[0040] Furthermore, in this embodiment, the protective plate 2 is detachably connected to the cutting head body 1 by bolts 3, and the bolts 3 are located near the inner ring of the protective plate 2. Multiple bolts 3 are evenly arranged along the circumference of the protective plate 2, and three are used as an example in this embodiment. Bolt connection has the characteristics of high strength and high rigidity, which can maintain the long-term performance of the connecting parts and ensure that the connection does not loosen or fall off; and the bolt connection is easy to disassemble, which is convenient for replacing the bolts 3 and reducing the cost of maintenance; and the bolt connection can connect parts of various materials, such as metal, plastic and wood, etc., and has a wide range of applications.

[0041] Based on the above, the protective plate 2 is detachably connected to the cutting head body 1 by using three bolts 3, so that the protective plate 2 can be fixed more stably and not easy to fall off. And when the protective plate 2 undergoes a large degree of plastic deformation, the protective plate 2 can be easily replaced. Optionally, in other embodiments, the protective plate 2 and the cutting head body 1 can also be detachably connected by screws.

[0042] The implementation process of the laser cutting head of this embodiment is:

[0043] Before cutting the workpiece, the protective plate 2 is connected to the cutting head body 1 by bolts 3, and then the cutting head body 1 performs the cutting operation on the workpiece. When the cutting head body 1 is moving, if the workpiece is lifted up, the protective plate 2 contacts the workpiece in advance. At this time, the impact force generated by the collision is absorbed by the plastic deformation of the protective plate 2 itself. At the same time, the controller of the laser cutting machine obtains the electrical signal of the contact between the protective plate 2 and the workpiece in time, and the controller immediately controls the cutting head body 1 to stop moving, so as to realize the active protection of the cutting head body 1. If the protective plate 2 is deformed greatly after the collision and cannot be used any more, the protective plate 2 can be replaced.

[0044] Obviously, the above embodiments of the present invention are merely examples for the purpose of clearly illustrating the present invention, and are not intended to limit the implementation methods of the present invention. For those skilled in the art, various obvious changes, readjustments and substitutions can be made without departing from the scope of protection of the present invention. It is not necessary and impossible to list all implementation methods here. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention shall be included in the scope of protection of the claims of the present invention.

Claims

1. A laser cutting head, comprising a cutting head body (1), characterized in that: The laser cutting head also includes: A protective plate (2) is arranged in an annular shape, and the protective plate (2) is sleeved on the outside of the cutting head body (1). The protective plate (2) is connected to the cutting head body (1), and the outer ring of the protective plate (2) extends out of the cutting head body (1). The protective plate (2) can make the outer ring of the protective plate (2) contact obstacles in advance during the movement of the cutting head body (1).

2. The laser cutting head according to claim 1, characterized in that: The cutting head body (1) is provided with a mounting plane (11), and the protective plate (2) is connected to the mounting plane (11).

3. The laser cutting head according to claim 1, characterized in that: The protective disk (2) is a circular ring, and the protective disk (2) is coaxially arranged with the cutting head body (1).

4. The laser cutting head according to claim 1, characterized in that: The protective plate (2) is detachably connected to the cutting head body (1).

5. The laser cutting head according to claim 4, characterized in that: The protective plate (2) is detachably connected to the cutting head body (1) via bolts (3), and a plurality of the bolts (3) are arranged along the circumferential direction of the protective plate (2).

6. The laser cutting head according to any one of claims 1 to 5, characterized in that: The protection plate (2) is made of metal and can be deformed when the protection plate (2) collides with the obstacle.

7. The laser cutting head according to claim 6, characterized in that: The protective plate (2) is made of a conductive metal material, and can form a passage between the protective plate (2) and the conductive obstacle.

8. The laser cutting head according to claim 6, characterized in that: The thickness of the protective plate (2) is 1-3 mm.

9. The laser cutting head according to any one of claims 1 to 5, characterized in that: The outer edge of the protective disk (2) is provided with an arc fillet (21).

10. Laser cutting machine, characterized in that, The laser cutting machine comprises the laser cutting head as described in any one of claims 1-9.

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