Laser cutting head with nozzle convenient to replace

Abstract

The utility model discloses a laser cutting head convenient for replacing a nozzle, which relates to the technical field of laser cutting and has the advantage of reducing the damage to a ceramic ring caused by too tight screwing of the nozzle when the nozzle is manually screwed. According to the technical scheme, the laser cutting head is characterized by comprising a laser cutting head body, a ceramic ring arranged at the lower end of the laser cutting head body and a nozzle with one end in threaded connection with the ceramic ring, and a connecting pipe in threaded connection with the inner wall of the ceramic ring is arranged on the side, facing the ceramic ring, of the nozzle; the connecting pipe is provided with a limiting piece for limiting continuous screwing-in of the connecting pipe.

Description

TECHNICAL FIELD

[0001] The utility model relates to laser cutting technical field, concretely is a laser cutting head convenient to replace nozzle. BACKGROUND

[0002] As a new type of thermal cutting technology, laser cutting has the advantages of fast cutting speed, high production efficiency, good cutting end face quality, small heat affected zone and environmental protection, and has become one of the main metal plate cutting methods and has been more and more widely used.

[0003] The nozzle is an important part of the laser cutting machine, and its main function is to focus and guide the laser beam to the workpiece for cutting. The nozzle of the prior art is installed on the lower end of the ceramic ring of the laser cutting head by threads, but the installation of the nozzle on the ceramic ring is usually operated manually. If the nozzle is screwed too tightly, the nozzle end face and the ceramic ring will be squeezed, which may damage the ceramic ring. Therefore, the applicant has developed a new technical solution to solve the above technical problems. SUMMARY

[0004] The utility model discloses a laser cutting head convenient to replace nozzle has the advantages that when manually tightening the nozzle, the damage of the ceramic ring caused by the nozzle being screwed too tightly is reduced.

[0005] To solve the above technical problems, the utility model adopts the following technical scheme:

[0006] The utility model provides a laser cutting head convenient to replace nozzle, including laser cutting head body and the ceramic ring and the nozzle of one end with ceramic ring screw connection of setting in the lower end of laser cutting head body, nozzle's side to ceramic ring is equipped with the connecting pipe with ceramic ring inner wall screw connection, after connecting pipe is spun into ceramic ring, be equipped with the limiting piece of limiting connecting pipe continues to spin into on connecting pipe.

[0007] By adopting the above technical scheme, when the nozzle is fixed on the ceramic ring through the connecting pipe, during the process of spinning the connecting pipe into the ceramic ring, the limiting piece limits the connecting pipe from spinning further after spinning a certain distance, so that when manually tightening the nozzle, the nozzle is screwed too tightly, and the damage of the ceramic ring caused by the nozzle squeezing the ceramic ring is reduced.

[0008] Preferably, the limiting piece includes an annular fixing disc arranged on the outer wall of the connecting pipe close to the nozzle, the periphery of the fixing disc extends beyond the outer wall of the ceramic ring, and the edge of the disc surface of each fixing disc is provided with a limiting rod extending towards the lower end surface of the laser cutting head body and abutting thereon.

[0009] Preferably, the fixing disc is sleeved on the outer wall of the connecting pipe, that is, the fixing disc does not rotate with the connecting pipe when the connecting pipe rotates.

[0010] Preferably, the limiting rods are arranged at the edge of the fixing disc.

[0011] Preferably, the ends of the limiting rods away from the fixing disc are connected by annular limiting rings.

[0012] Preferably, the limiting rings and the fixing disc are provided with a plurality of inclined plates between the limiting rods, the inclined plates gradually incline towards the ceramic ring, and the number of the inclined plates is greater than the number of the limiting rods.

[0013] The beneficial effects of the utility model lie in that when the nozzle is fixed on the ceramic ring through the connecting pipe, during the process of rotating the connecting pipe into the ceramic ring, the limiting member limits the connecting pipe from continuing to rotate after the connecting pipe is rotated to a certain distance, so that when the nozzle is manually tightened, the nozzle is not tightened too tightly, and thus the nozzle does not cause damage to the ceramic ring by extruding the ceramic ring, and the nozzle is convenient to replace and install. BRIEF DESCRIPTION OF DRAWINGS

[0014] In order to more clearly illustrate the technical scheme in the embodiments of the utility model or the prior art, the drawings needed to be used in the embodiment or the prior art description will be briefly introduced below, and obviously, the drawings in the following description are only some embodiments of the utility model, and for those skilled in the art, other drawings can also be obtained according to these drawings without creative labor.

[0015] Figure 1 It is a structural schematic view for embodying the inclined plate of the embodiment.

[0016] Figure 2 It is a structural schematic view for embodying the inclined plate of the embodiment.

[0017] Figure 3 It is a structural schematic view for embodying the inclined plate of the embodiment.

[0018] Explanation of reference signs:

[0019] In the drawing: 1, laser cutting head body; 11, ceramic ring; 12, nozzle; 13, connecting pipe; 14, fixing disc; 141, limiting rod; 142, limiting ring; 143, inclined plate. DETAILED DESCRIPTION

[0020] With reference to the drawings of the embodiments of the present application, the technical solutions in the embodiments of the present application will be clearly and completely described. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments of the present application, all the other embodiments obtained by those skilled in the art without creative efforts fall within the scope of the present application.

[0021] A laser cutting head facilitating replacement of a nozzle 12, such as Figure 1 and Figure 2 , comprising a laser cutting head body 1, a ceramic ring 11 arranged at the lower end of the laser cutting head body 1, and a nozzle 12 threadedly connected to one end of the ceramic ring 11, the side of the nozzle 12 facing the ceramic ring 11 being provided with a connecting pipe 13 threadedly connected to the inner wall of the ceramic ring 11, the connecting pipe 13 being provided with a limiting piece limiting the connecting pipe 13 from being screwed in further after being screwed into the ceramic ring 11. The connecting pipe 13 is in communication with the nozzle 12, and the purpose is to facilitate installation of the nozzle 12 onto the ceramic ring 11.

[0022] As Figure 1 and Figure 2 , when the nozzle 12 is fixed on the ceramic ring 11 through the connecting pipe 13, the nozzle 12 is manually screwed into the ceramic ring 11 during the process of screwing the connecting pipe 13 into the ceramic ring 11, and the limiting piece limits the connecting pipe 13 from being screwed in further when the connecting pipe 13 is screwed in to a certain distance, i.e., the nozzle 12 is fixed on the ceramic ring 11 and there is a gap between the nozzle 12 and the ceramic ring 11. The limiting piece limits the connecting pipe 13 from being screwed in further, so that when the nozzle 12 is manually tightened, the nozzle 12 is not tightened too tightly, and thus the nozzle 12 does not squeeze the ceramic ring 11 to cause damage to the ceramic ring 11. Moreover, the above-mentioned nozzle 12 only needs to be screwed into the ceramic ring 11 during installation, which facilitates replacement and disassembly of the nozzle 12.

[0023] As Figure 1 and Figure 3, the limiting piece includes annular fixing disc 14 arranged on the outer wall of the connecting pipe 13 near the nozzle 12, the periphery of the fixing disc 14 extends out of the outer wall of the ceramic ring 11, that is, the diameter of the fixing disc 14 is greater than the outer diameter of the ceramic ring 11, and the edge of the disc surface of each fixing disc 14 is provided with a limiting rod 141 extending towards the lower end surface of the laser cutting head body 1 and abutting against the lower end surface of the laser cutting head body 1. With the connecting pipe 13 being screwed into the ceramic ring 11, the limiting rod 141 gradually approaches the lower end surface of the laser cutting head body 1 until the limiting rod 141 abuts against the lower end surface of the laser cutting head body 1, at which time the screwing of the connecting pipe 13 into the ceramic ring 11 is limited, and the nozzle 12 is installed in place, at which time a gap can be formed between the upper end surface of the fixing disc 14 and the lower end surface of the ceramic ring 11, or the fixing disc 14 abuts against the lower end surface of the ceramic ring 11, and the force when the fixing disc 14 abuts against the lower end surface of the ceramic ring 11 is not very large, only the abutting of the fixing disc 14 against the lower end surface of the ceramic ring 11, thereby reducing the damage to the ceramic ring 11.

[0024] As Figure 1 and Figure 2 , the fixing disc 14 is sleeved on the outer wall of the connecting pipe 13, that is, when the connecting pipe 13 rotates, the fixing disc 14 does not rotate with the connecting pipe 13, so that the connecting pipe 13 can be rotated when the limiting rod 141 contacts the lower end surface of the laser cutting head body 1.

[0025] As Figure 1 and Figure 2 , the limiting rod 141 is provided with a plurality of limiting rods 141 distributed along the periphery of the fixing disc 14. The purpose of this design is that the wet limiting rod 141 forms a guardrail outside the ceramic ring 11, and one end of each limiting rod 141 away from the fixing disc 14 is connected through an annular limiting ring 142. At this time, the limiting ring 142 abuts against the lower end surface of the laser cutting head body 1, which is convenient for limiting the length of the connecting pipe 13 screwed in, and the arrangement of each limiting rod 141 increases the position strength of the limiting ring 142.

[0026] As Figure 1 and Figure 2 , a plurality of inclined plates 143 between the limiting rods 141 are arranged between the limiting ring 142 and the fixing disc 14, the inclined plates 143 gradually incline towards the ceramic ring 11, and the number of the inclined plates 143 is greater than the number of the limiting rods 141. The arrangement of the inclined plates 143 makes it convenient for air to circulate around the ceramic ring 11 and the nozzle 12 when the laser cutting head body 1 reciprocates, thereby facilitating heat dissipation.

[0027] Obviously, those skilled in the art can make various modifications and variations to the present application without departing from the spirit and scope of the present application. Thus, if these modifications and variations of the present application fall within the scope of the claims of the present application and their equivalent technologies, the present application also intends to include these modifications and variations.

Claims

1. A laser cutting head facilitating nozzle replacement, characterized in that, The application relates to a laser cutting head body (1) and a ceramic ring (11) arranged at the lower end of the laser cutting head body (1) and a nozzle (12) threadedly connected to one end of the ceramic ring (11), wherein the side of the nozzle (12) facing the ceramic ring (11) is provided with a connecting pipe (13) threadedly connected to the inner wall of the ceramic ring (11), and the connecting pipe (13) is provided with a limiting piece limiting the connecting pipe (13) from being screwed in further after the connecting pipe (13) is screwed into the ceramic ring (11).

2. A laser cutting head with easy nozzle replacement as claimed in claim 1, characterized in that The limiting piece comprises annular fixing discs (14) arranged on the outer wall of the connecting pipe (13) close to the nozzle (12), the periphery of the fixing disc (14) extends beyond the outer wall of the ceramic ring (11), and the edge of the disc surface of each fixing disc (14) is provided with a limiting rod (141) extending towards the lower end surface of the laser cutting head body (1) and abutting against the lower end surface.

3. A laser cutting head with easy nozzle replacement as claimed in claim 2, characterized in that The fixing disc (14) is sleeved on the outer wall of the connecting pipe (13), that is, when the connecting pipe (13) rotates, the fixing disc (14) does not rotate with the connecting pipe (13).

4. A laser cutting head facilitating nozzle replacement as claimed in claim 2 or 3, wherein, The limiting rod (141) is arranged on the edge of the fixing disc (14) and is distributed along the periphery of the fixing disc (14).

5. A laser cutting head facilitating nozzle replacement as claimed in claim 4, wherein, The end of each limiting rod (141) away from the fixing disc (14) is connected through an annular limiting ring (142).

6. A laser cutting head facilitating nozzle replacement as claimed in claim 5, wherein, The limiting ring (142) and the fixing disc (14) are provided with a plurality of inclined plates (143) between the limiting rods (141), the inclined plates (143) gradually incline towards the ceramic ring (11), and the number of the inclined plates (143) is greater than that of the limiting rods (141).

Images