Laser cutting head

Abstract

The laser cutting head comprises a water cooling assembly and a diaphragm assembly, the water cooling assembly comprises a water cooling main body and a water cooling cover plate, the diaphragm assembly comprises a diaphragm structure, and light absorption layers are arranged on the water cooling main body and the diaphragm structure; the water cooling assembly comprises a diaphragm water cooling channel arranged between the water cooling cover plate and the diaphragm assembly and a cutting head water cooling channel located on the water cooling body. The stray light reflected in the laser cutting process is absorbed through the diaphragm structure, and the effect of absorbing the stray light is achieved. And in combination with the arranged water cooling assembly, heat generated in the cutting process, especially heat generated after heat dissipation light is absorbed, can be removed in time, and the cooling effect in the laser cutting process is improved while stray light is absorbed. By arranging the light absorption layer on the water cooling main body of the water cooling assembly, the technical effect of stray light double absorption can be achieved, and the effective cooling effect can be guaranteed.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of laser cutting, in particular to a laser cutting head. BACKGROUND

[0002] In the laser cutting process, especially when cutting medium-thick plates or some high-reflectivity materials such as copper, aluminum and the like, the reflected light is irregular, that is, stray light. The condition of stray light generated inside the laser head is different according to the cut plate and the power level. The higher the material reflectivity and the higher the power, the more stray light is generated.

[0003] Traditional methods for eliminating stray light are rarely seen. The reason is that the traditional power is low, and the stray light energy generated is weak, which does not affect the normal cutting process and the service life of the equipment. However, as the power becomes higher and higher, the plate becomes thicker and more diverse, there is an urgent need for a structure to eliminate or reduce stray light generated during cutting, so as to realize stable cutting and prolong the service life of the laser cutting equipment. CONTENT OF THE INVENTION

[0004] The purpose of the application is to provide a laser cutting head which is simple in structure, easy to function, can limit stray light in a small range, double absorption, and can ensure effective cooling effect.

[0005] In order to achieve the above purpose, the utility model provides a kind of laser cutting head, comprising: water cooling component and diaphragm component, the water cooling component includes water cooling main body and water cooling cover plate, the diaphragm component includes diaphragm structure, the water cooling main body and the diaphragm structure are all provided with light absorption layer;

[0006] The water cooling component includes a diaphragm water cooling channel arranged between the water cooling cover plate and the diaphragm component, and a cutting head water cooling channel located on the water cooling main body.

[0007] In an optional embodiment, a joint assembly is connected above the water cooling cover plate, the diaphragm component is installed below the water cooling cover plate, and a protective mirror assembly is installed below the diaphragm component.

[0008] In an optional embodiment, a water inlet joint, a water outlet joint and a diaphragm water cooling plug are connected to the water cooling cover plate, and the diaphragm water cooling channel is communicated with a diaphragm main body communication channel.

[0009] In an optional embodiment, the diaphragm water cooling channel includes an annular channel surrounding the periphery of the diaphragm structure, and a straight channel communicated with the annular channel, the straight channel is communicated with the cutting head water cooling channel through the diaphragm main body communication channel.

[0010] In an optional embodiment, the diaphragm assembly comprises a diaphragm main body, the diaphragm structure is fixed on the diaphragm main body by press-fitting of a diaphragm cover plate, diaphragm sealing rings are arranged between the diaphragm main body and the diaphragm cover plate, between the diaphragm structure and the diaphragm cover plate, and between the diaphragm main body and the diaphragm structure respectively, and a diaphragm main body communication channel is arranged on the diaphragm main body.

[0011] In an optional embodiment, the cutting head water cooling channel comprises a left side water cooling channel and a right side water cooling channel arranged on the water cooling main body, and a sealing cover is connected to the side wall of the water cooling main body, the sealing cover of each side cutting head water cooling channel comprises two sealing covers corresponding to the front and back, and the two sealing covers are arranged in an up-and-down staggered manner.

[0012] In an optional embodiment, each side cutting head water cooling channel comprises a plurality of cutting head linear channels arranged in an up-and-down staggered manner, for the return flow of cooling water, and the sealing cover covers and seals the end of the cutting head linear channel where the cooling water flows back in the middle.

[0013] In an optional embodiment, the water cooling main body is internally provided with a waterway communication channel, and the left side water cooling channel and the right side water cooling channel are communicated through the waterway communication channel.

[0014] The extension direction of the waterway communication channel is perpendicular to the extension direction of the cutting head linear channel, and the waterway communication channel comprises a through hole arranged through the water cooling main body, and a main body sealing head is connected to the end of the through hole.

[0015] In an optional embodiment, a water cooling main body sealing ring is arranged between the sealing cover and each cutting head linear channel.

[0016] In an optional embodiment, the diaphragm structure comprises a two-way horn-shaped waist structure made of stainless steel, the material of the water cooling main body comprises aluminum alloy, and the light-absorbing layer comprises a ferroferric oxide layer plated on the water cooling main body and the diaphragm structure.

[0017] By arranging the diaphragm assembly, the stray light reflected during the laser cutting process can be absorbed by the diaphragm structure, achieving the effect of absorbing stray light.

[0018] Combined with the arranged water cooling assembly, the heat generated during the cutting process, especially the heat after absorbing the stray light, can be removed in time, achieving the absorption of stray light and improving the cooling effect of the laser cutting process.

[0019] By arranging the light-absorbing layer on the water cooling main body of the water cooling assembly, the technical effect of double absorption of stray light can be achieved on the basis of the absorption of stray light by the diaphragm structure.

[0020] The water cooling channel of the diaphragm and the water cooling channel of the cutting head can respectively cool the diaphragm and the main body, ensure the cooling effect of the laser cutting head, effectively remove the heat absorbed by the stray light, and prolong the service life of the laser cutting head assembly.

[0021] Other features and advantages of the present application will be described in detail in the following specific embodiments. BRIEF DESCRIPTION OF DRAWINGS

[0022] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings needed in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present application, and therefore should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can also be obtained without creative labor.

[0023] Figure 1 Fig. 1 is a schematic diagram of the overall external structure of the laser cutting head;

[0024] Figure 2 Fig. 2 is a schematic diagram of the internal structure of the laser cutting head in the direction of J-J; Figure 1

[0025] Figure 3 Figure 1 Fig. 5 is a schematic diagram of the cross-sectional structure of the diaphragm body in the direction of K-K;

[0026] Figure 4 Fig. 6 is a schematic diagram of the front view structure of the water cooling cover plate;

[0027] Figure 5 Fig. 7 is a schematic diagram of the side view structure of the water cooling cover plate;

[0028] Figure 6 Fig. 8 is a schematic diagram of the cross-sectional structure of the water cooling cover plate in the horizontal direction;

[0029] Figure 7 Fig. 9 is a schematic diagram of the cross-sectional structure of the diaphragm body in the vertical direction;

[0030] Figure 8 Fig. 10 is a schematic diagram of the front view structure of the water cooling main body;

[0031] Figure 9 Fig. 11 is a schematic diagram of the side view structure of the water cooling main body;

[0032] Figure 10 Fig. 12 is a schematic diagram of the structure of the left water cooling channel on the water cooling main body;

[0033] Figure 11 Fig. 13 is a schematic diagram of the structure of the right water cooling channel on the water cooling main body.​​

[0034] Icon:

[0035] 100 - joint assembly; 200 - water cooling assembly; 300 - diaphragm assembly; 400 - protective mirror assembly; 500 - collimating assembly;

[0036] 201 - water cooling cover plate; 202 - water inlet joint; 203 - water outlet joint; 204 - diaphragm water cooling plug; 205 - water cooling main body; 206 - adapter sealing ring; 207 - sealing cover; 208 - water cooling main body sealing ring; 209 - main body plug; 210 - water channel communication hole; 220 - water inlet flow channel; 230 - water outlet flow channel; 240 - diaphragm water cooling channel; 250 - cutting head water cooling channel; 260 - diaphragm main body communication hole;

[0037] 301 - diaphragm structure; 302 - diaphragm main body; 303 - diaphragm sealing ring; 304 - diaphragm cover plate. DETAILED DESCRIPTION

[0038] In order to make the purpose, technical scheme and advantages of the embodiments of the present application clearer, the technical scheme of the embodiments of the present application will be described clearly and completely below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are some embodiments of the present application, not all embodiments of the present application. The components of the embodiments of the present application described and shown in the drawings can be arranged and designed in various different configurations.

[0039] In the description of the present application, it should be noted that the positions or location relationships indicated by the terms “inner”, “outer” and the like are based on the positions or location relationships shown in the drawings, or the positions or location relationships in which the products of the present application are usually placed, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the indicated devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application. In addition, the terms “first”, “second” and the like are only used to distinguish the description and cannot be understood as indicating or implying relative importance.

[0040] In the description of the present application, it should be noted that, unless otherwise explicitly specified and limited, the terms “set”, “connected” should be understood broadly, for example, can be fixedly connected, can be detachably connected, or integrally connected; can be directly connected, or indirectly connected through an intermediate medium; can be the communication inside two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0041] The laser cutting head in the application is mainly used for laser cutting of plates, and the absorption effect of stray light is enhanced and the cooling effect of the overall structure is enhanced by improving the structure of the laser cutting head, and especially the heat absorbed after absorbing stray light is removed in time.

[0042] Referring to Figure 1 , in combination with Figures 2-3 , and in combination with Figures 4-11 , the laser cutting head in the application, the main structure includes a water cooling assembly 200 and a diaphragm assembly 300, the water cooling assembly 200 specifically includes a water cooling main body 205 and a water cooling cover plate 201, and mainly plays a specific cooling effect.

[0043] The diaphragm assembly 300 includes a diaphragm structure 301, which can absorb stray light through the setting of the diaphragm structure 301.

[0044] In combination with the light-absorbing layer arranged on the water cooling main body 205 and the diaphragm structure 301, the technical purpose of double absorption of stray light can be achieved.

[0045] The diaphragm water cooling channel 240 arranged between the water cooling cover plate 201 and the diaphragm assembly 300, and the cutting head water cooling channel 250 located on the water cooling main body 205 can remove the heat absorbed after absorbing stray light through cooling water in time, so that the cooling effect of the overall laser cutting head can be improved.

[0046] The laser cutting head in the application can realize the function of double absorption of stray light with a simple structure, and the cooling effect is improved to the maximum extent.

[0047] In one specific embodiment, from the perspective of basic laser cutting function, the upper portion of the water cooling cover plate 201 is connected with a connector assembly 100, and the connector assembly 100 is mainly used for connecting with a fiber emitter.

[0048] The diaphragm assembly 300 is installed below the water cooling cover plate 201, and the water cooling cover plate 201 is arranged above the diaphragm assembly 300, in combination with the diaphragm water cooling channel 240 between the water cooling cover plate 201 and the diaphragm assembly 300, so that the water cooling of the diaphragm assembly 300 can be realized, and the heat absorbed by the diaphragm assembly 300 can be removed in time.

[0049] A protection mirror assembly 400 is installed below the diaphragm assembly 300, which mainly protects the internal lens and provides reliable laser cutting function.

[0050] In another specific embodiment, the water inlet joint 202, the water outlet joint 203 and the diaphragm water cooling plug 204 are connected to the water cooling cover plate 201, mainly used for introducing and discharging the external circulating cooling water into and out of the diaphragm water cooling channel 240 and the cutting head water cooling channel 250 communicated therewith.

[0051] The circulating cooling water in this embodiment flows in the diaphragm water cooling channel 240 and the cutting head water cooling channel 250 in a closed manner, which can reduce the joint setting of the cooling water pipeline.

[0052] At the same time, by connecting the diaphragm water cooling channel 240 and the cutting head water cooling channel 250, it can be ensured that the circulating cooling water is introduced into the overall cooling water channel through the water inlet joint 202 and discharged through the water outlet joint 203, so as to timely discharge the stray light heat absorbed by different parts of the laser cutting head, especially the water cooling main body 205 and the diaphragm structure 301 during the flow process.

[0053] Based on this, the diaphragm water cooling channel 240 is connected with the diaphragm main body communication channel 260, and the diaphragm water cooling channel 240 and the cutting head water cooling channel 250 are communicated through the diaphragm main body communication channel 260.

[0054] Specifically, the diaphragm water cooling channel 240 includes an annular channel surrounding the periphery of the diaphragm structure 301, and a straight channel communicated with the annular channel, and the straight channel is communicated with the cutting head water cooling channel 250 through the diaphragm main body communication channel 260.

[0055] In a specific structure, based on that the diaphragm assembly 300 is installed below the water cooling cover plate 201, the diaphragm assembly 300 includes a diaphragm main body 302, and the diaphragm structure 301 is press-fitted and fixed on the diaphragm main body 302 through the diaphragm cover plate 304, and more specifically, the bottom wall of the water cooling cover plate 201 and the top wall of the diaphragm main body 302 are provided with annular grooves and straight grooves capable of being butt-jointed and assembled, so as to form a closed structure of the diaphragm water cooling channel 240 through the buckling assembly of the water cooling cover plate 201 and the diaphragm main body 302.

[0056] In order to ensure the sealed isolation of the diaphragm assembly 300 and the cooling water, and avoid water leakage, the diaphragm sealing ring 303 is arranged between the diaphragm cover plate 304 and the diaphragm main body 302, between the diaphragm structure 301 and the diaphragm cover plate 304, and between the diaphragm main body 302 and the diaphragm structure 301, and based on that the water cooling main body 205 is arranged below the diaphragm assembly 300, the cooling water can enter the cutting head water cooling channel 250 after passing through the diaphragm water cooling channel 240 by arranging the diaphragm main body communication channel 260 on the diaphragm main body 302.

[0057] From the perspective of enhancing the cooling effect of the water-cooled main body 205, the cutting head water-cooled channel 250 includes a left water-cooled channel and a right water-cooled channel arranged on the water-cooled main body 205, and a sealing cover 207 is connected to the side wall of the water-cooled main body 205, and the sealing cover 207 of each cutting head water-cooled channel 250 includes two corresponding sealing covers arranged in front and back, and the two sealing covers 207 are arranged in an up-and-down staggered manner.

[0058] Specifically, each cutting head water-cooled channel 250 includes a plurality of cutting head linear channels arranged in an up-and-down staggered manner for the return flow of cooling water, and the sealing cover 207 covers and blocks the end of the cutting head linear channel for the intermediate return flow of cooling water.

[0059] The water-cooled main body is provided with a water channel communication hole 210, which is mainly used to communicate the left water-cooled channel and the right water-cooled channel through the water channel communication hole 210, so that the cooling water can flow through.

[0060] From the perspective of return flow, the extension direction of the water channel communication hole 210 is perpendicular to the extension direction of the cutting head linear channel, and the water channel communication hole 210 includes a through hole arranged in the water-cooled main body 205, which is beneficial to machining and reduces the difficulty of machining. At the same time, the main body blocking head 209 is connected to the end of the through hole, which can make the water flow of the cooling water flow through the inside and prevent water leakage on the water-cooled main body 205.

[0061] From the perspective of further avoiding water leakage, the sealing cover 207 and each cutting head linear channel are provided with a water-cooled main body sealing ring 208, which can effectively seal the cutting head linear channel.

[0062] A collimating assembly 500 is also installed at the bottom of the water-cooled main body 205, which is mainly used to expand and integrate the light beam. When cutting the plate, the scattered light will enter the laser head inside the nozzle position, and the scattered light will enter the diaphragm assembly 300 through the collimating lens of the collimating assembly 500.

[0063] The diaphragm structure 301 includes a beam waist structure of a two-way horn mouth made of stainless steel, the material of the water-cooled main body 205 includes aluminum alloy, and the light-absorbing layer includes a ferric oxide layer plated on the water-cooled main body 205 and the diaphragm structure 301.

[0064] The diaphragm structure 301 of the beam waist structure of the two-way horn mouth is as small as possible without affecting the normal passage of the light beam, thereby maximizing the absorption of stray light.

[0065] The water-cooled main body 205 made of aluminum alloy has better heat dissipation performance, which is beneficial to improve the heat dissipation performance.

[0066] The four iron oxide layer plated on the stainless steel diaphragm structure 301 can absorb a large amount of stray light while ensuring that the material is not damaged by stray light energy.

[0067] The hard black oxide layer on the surface of the water-cooled main body 205 after the process treatment can absorb a small amount of stray light, prevent the light hitting the side wall from continuing to reflect upward, and reduce the pressure on the diaphragm structure 301 to absorb stray light, thereby achieving the technical purpose of double absorption of stray light.

[0068] During the specific flow process of the cooling water, the cooling water is connected to the outlet of the water cooler at the water inlet joint 202 position, enters the diaphragm assembly 300 at the water inlet joint 202 position, and then enters the cutting head water cooling channel 250 inside the water-cooled main body 205 through the diaphragm main body communication hole 260 on the diaphragm main body 302 after circulating in the annular channel at the diaphragm structure 301 position.

[0069] The diaphragm cover plate 304 is fixed on the diaphragm main body 302, and the diaphragm water cooling channel 240 of the diaphragm structure 301 is tightly sealed by the diaphragm sealing ring 303 to ensure that there is no water leakage. The diaphragm water cooling channel 240 is formed by the assembly of the water-cooled cover plate 201 and the diaphragm main body 302, and the diaphragm water cooling plug 204 seals the straight channel of the diaphragm water cooling channel 240 to form an annular water channel.

[0070] The water inlet is introduced into the cutting head water cooling channel 250 inside the water-cooled main body 205 through the diaphragm main body communication hole 260 on the diaphragm main body 302, and the adapter sealing ring 206 is installed at the water inlet channel 220 and the water outlet channel 230 position to ensure that the diaphragm main body 302 and the water-cooled main body 205 are completely sealed to prevent water from flowing out.

[0071] The four sealing covers 207 and the four water-cooled main body sealing rings 208 are installed on the water-cooled main body 205, and the water-cooled main body 205 is provided with a water channel communication hole 210 on each of the left and right sides, and a main body plug 209 is connected to the end of the water channel communication hole 210 to form an annular water channel with the cavity in the sealing cover 207, thereby ensuring sufficient water cooling. The cooling water enters the inlet channel, circulates through the left and right water cooling channels, and then flows out of the diaphragm main body 302 at the water outlet joint 203 position.

[0072] When the stray light passes through the collimating assembly 500, it is reflected in a diffuse manner, i.e., irregularly reflected in all directions. At this time, a portion of the light hits the side wall of the water-cooled main body 205, and the light-absorbing layer on the water-cooled main body 205 absorbs the diffuse stray light, and the cooling water flowing in the cutting head water cooling channel 250 in the water-cooled main body 205 carries away the heat generated by the absorbed light.

[0073] At the same time, part of the stray light will continue to reflect up to the position of the diaphragm assembly 300. Because the beam port of the diaphragm position is small, the remaining stray light will continue to hit the diaphragm structure 301. The diaphragm structure 301 takes away the energy absorbed by the diaphragm structure 301 through the cooling water flowing in the diaphragm water cooling channel 240.

[0074] The laser cutting head in the utility model has good cooling effect, can take away heat in time, double stray light absorption, ensures that the equipment is not damaged, the beam waist structure design of the diaphragm position ensures that the beam waist aperture is as small as possible under normal use, and the stray light absorption effect is good.

[0075] It should be noted that the features in the embodiments of the present application can be combined with each other without conflict.

[0076] The above only describes the preferred embodiments of the present application and is not used to limit the present application. For those skilled in the art, the present application can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A laser cutting head, characterized in that, include: A water-cooling assembly and an aperture assembly, wherein the water-cooling assembly includes a water-cooling body and a water-cooling cover plate, and the aperture assembly includes an aperture structure, and both the water-cooling body and the aperture structure are provided with light-absorbing layers; The water-cooling assembly includes an aperture water-cooling channel disposed between the water-cooling cover plate and the aperture assembly, and a cutting head water-cooling channel located on the water-cooling body.

2. The laser cutting head according to claim 1, characterized in that, A connector assembly is connected above the water-cooled cover plate, the aperture assembly is installed below the water-cooled cover plate, and a protective mirror assembly is installed below the aperture assembly.

3. The laser cutting head according to claim 1, characterized in that, The water-cooled cover plate is connected to an inlet connector, an outlet connector, and an aperture water-cooled plug, and the aperture water-cooled channel is connected to the aperture body connecting channel.

4. The laser cutting head according to claim 3, characterized in that, The aperture water-cooling channel includes an annular channel surrounding the aperture structure and a DC channel communicating with the annular channel. The DC channel is connected to the cutting head water-cooling channel through the aperture body connecting hole.

5. The laser cutting head according to claim 3, characterized in that, The aperture assembly includes an aperture body, and the aperture structure is press-fitted onto the aperture body by an aperture cover plate. Aperture sealing rings are respectively provided between the aperture cover plate and the aperture body, between the aperture structure and the aperture cover plate, and between the aperture body and the aperture structure. A connecting channel is provided on the aperture body.

6. The laser cutting head according to any one of claims 1-5, characterized in that, The cutting head water cooling channel includes a left water cooling channel and a right water cooling channel disposed on the water cooling body, and a sealing cover is connected to the side wall of the water cooling body. The sealing cover of each cutting head water cooling channel includes two corresponding front and rear pieces, and the two sealing covers are arranged alternately vertically.

7. The laser cutting head according to claim 6, characterized in that, Each cutting head water cooling channel includes multiple straight channels spaced vertically for cooling water to flow back and forth. The sealing cap covers and seals the ends of the straight channels through which the cooling water flows back and forth.

8. The laser cutting head according to claim 7, characterized in that, The water-cooled main body is provided with a water passage connection channel inside, and the left water-cooling channel and the right water-cooling channel are connected through the water passage connection channel. The extension direction of the water passage is perpendicular to the extension direction of the straight channel of the cutting head, and the water passage includes a through-hole that passes through the water-cooling body, with a body sealing head connected to the end of the through-hole.

9. The laser cutting head according to claim 7, characterized in that, A water-cooled main sealing ring is provided between the sealing cover and each of the linear channels of the cutting head.

10. The laser cutting head according to claim 6, characterized in that, The aperture structure includes a double-sided flared waist structure made of stainless steel, the water-cooling body is made of aluminum alloy, and the light-absorbing layer includes a magnetite oxide layer plated on the water-cooling body and the aperture structure.

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