Laser processing head and laser processing system

Abstract

The embodiment of the utility model discloses a laser processing head and a laser processing system, the laser processing head comprises a support body and a nozzle, the nozzle comprises a spraying side, a mounting side and a body part, the mounting side is detachably connected to the end part of the support body close to one side of the nozzle, and a cooling gap is formed between the mounting side and the end part of the support body close to one side of the nozzle; a cooling groove channel is formed in the peripheral wall of the body part, a cooling channel communicated with the cooling groove channel and the cooling gap is formed in the body part, an air blowing hole is formed in the end, close to one side of the nozzle, of the supporting body and used for blowing cooling air flow to the mounting side, and part of the cooling air flow is discharged under guiding of the cooling gap. And the other part of the cooling airflow is transmitted to the cooling channel through the cooling channel and is discharged under the guide of the cooling channel, so that the cooling of the second layer of nozzles is realized, and the cooling effect of the nozzles can be improved and the service life of the nozzles can be prolonged through the cooling of the double-layer nozzles.

Description

Technical Field

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

[0002] In laser processing, the nozzle will be burned out if used for a long time. If the nozzle is burned out, it needs to be replaced before the laser processing head can work normally. Generally speaking, the nozzle is burned out because the high-energy laser beam directly irradiates the nozzle, causing the internal temperature of the nozzle to be too high, thereby causing the nozzle to burn out. In the existing technology, cooling gas is used to cool the nozzle, but the cooling effect is not good. Utility Model Content

[0003] The utility model aims to provide a laser processing head and a laser processing system, aiming to solve the problem that in the existing laser processing head, cooling gas is used to cool the nozzle, but the cooling effect is poor.

[0004] In a first aspect, the utility model provides a laser processing head, the laser processing head comprising a support body and a nozzle, the nozzle comprising an injection side and a mounting side arranged opposite to each other, and a main body portion arranged between the injection side and the mounting side, the mounting side being detachably connected to an end portion of the support body close to the nozzle side, and having a cooling gap between the mounting side and the end portion of the support body close to the nozzle side, a cooling groove being provided on an outer peripheral wall of the main body portion, a cooling channel connecting the cooling groove and the cooling gap being provided in the main body portion, and an air blowing hole being provided at the end portion of the support body close to the nozzle side;

[0005] The blowing hole is used to blow out a cooling airflow to the mounting side, a portion of the cooling airflow is discharged under the guidance of the cooling gap, and another portion of the cooling airflow is transmitted to the cooling channel through the cooling passage and discharged under the guidance of the cooling channel.

[0006] In one embodiment, an annular groove is provided on the mounting side, and the groove wall of the annular groove and the support body form the cooling gap.

[0007] In one embodiment, the annular groove includes a bottom wall disposed opposite to the end of the support body close to the nozzle, and a side wall disposed opposite to the outer peripheral wall of the support body;

[0008] A laser channel is provided in the nozzle and passes through the injection side and the mounting side, and a center line of the laser channel forms an axis of the nozzle;

[0009] The cooling gap includes a first gap formed by the bottom wall and the end of the support body close to the nozzle, and a second gap formed by the side wall and the outer peripheral wall of the support body. The first gap extends in a direction perpendicular to the axis of the nozzle, and the second gap extends in a direction parallel to the axis of the nozzle.

[0010] In one embodiment, a laser channel is provided in the nozzle, passing through the injection side and the mounting side, and a center line of the laser channel forms an axis of the nozzle;

[0011] The cooling channel is an annular channel, comprising an inner edge portion close to the axis of the nozzle, an opening portion opened on the outer peripheral wall of the main body, and an extension section connecting the inner edge portion and the opening portion;

[0012] The groove wall of the cooling channel close to the support body forms a first surface, and the groove wall of the cooling channel away from the support body forms a second surface.

[0013] The extension section is an extension channel formed by the first surface and the second surface.

[0014] In one embodiment, the extending direction of the extension section is perpendicular to the axial direction of the nozzle; and / or,

[0015] The cooling channel extends from the annular groove to the inner edge of the cooling channel.

[0016] In one embodiment, a laser channel is provided in the nozzle, passing through the injection side and the mounting side, and a center line of the laser channel forms an axis of the nozzle;

[0017] A plurality of cooling channels are provided and are arranged around the axis of the nozzle; and / or an extension direction of the cooling channel is parallel to the axis of the nozzle.

[0018] In one embodiment, the nozzle is a bevel nozzle.

[0019] In one embodiment, a connection structure for detachably connecting to the support body is formed on the mounting side, the connection structure is a first threaded structure, and the inner cavity of the support body is provided with a second threaded structure adapted to the first threaded structure; and / or,

[0020] The support body includes a first support structure and a second support structure detachably connected to the first support structure, wherein the first support structure is provided with a cavity and a mounting port communicating with the cavity;

[0021] The laser processing head further includes a mounting ring, which is disposed in the cavity and abuts against a limiting protrusion of the cavity, and the second supporting structure is threadedly connected to the mounting ring.

[0022] In one embodiment, the outer wall of the nozzle is provided with an anti-stick and heat-resistant coating, and the anti-stick and heat-resistant coating is a Teflon coating, an aluminum oxide coating, a ceramic coating or a diamond coating.

[0023] In a second aspect, the utility model further provides a laser processing system, which includes a laser head and the laser processing head of any of the above embodiments, and the laser processing head is used to eject the laser beam emitted by the laser head.

[0024] The following beneficial effects are achieved by adopting the embodiments of the present invention:

[0025] By adopting the laser processing head and laser processing system of the present invention, a cooling groove is provided on the outer peripheral wall of the main body, and a cooling channel connecting the cooling groove and the cooling gap is provided in the main body. The blowing hole blows out a cooling airflow to the installation side, and a part of the cooling airflow is discharged under the guidance of the cooling gap, thereby realizing the cooling of the first layer of nozzles. The other part of the cooling airflow is transmitted to the cooling groove through the cooling channel and discharged under the guidance of the cooling groove, thereby realizing the cooling of the second layer of nozzles. Through double-layer nozzle cooling, the cooling effect of the nozzle can be improved and the service life of the nozzle can be extended.

[0026] In addition, since the cooling channel is arranged between the injection side and the installation side, the arrangement of the cooling channel can reduce the distance between the cooling position and the injection side, thereby further enhancing the cooling effect of the injection side of the nozzle. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0028] in:

[0029] Figure 1 Schematic diagram of a nozzle in one embodiment.

[0030] Figure 2 for Figure 1 Front view of the nozzle shown.

[0031] Figure 3 for Figure 2 Middle AA section view.

[0032] Figure 4 Schematic diagram of a laser processing head in another embodiment.

[0033] Figure 5 It is a front view of the laser processing head in another embodiment.

[0034] Figure 6 for Figure 5 A top view of the laser processing head.

[0035] Figure 7 for Figure 6 Middle BB cross-section view.

[0036] Figure 8 for Figure 7 Enlarged schematic diagram of part C in the middle.

[0037] Figure 9 for Figure 4 Schematic diagram of the nozzle in the laser processing head shown.

[0038] Figure 10 for Figure 4 Front view of the nozzle shown.

[0039] Figure 11 for Figure 10 Middle DD cross-sectional view.

[0040] Reference numerals: 100, support body; 110, air blowing hole; 120, first support structure; 121, cavity; 130, second support structure; 140, mounting ring; 150, first laser channel;

[0041] 200, nozzle; 210, injection side; 220, mounting side; 221, connection structure; 230, main body; 240, cooling channel; 241, inner edge portion; 242, opening portion; 243, extension section; 244, first surface; 245, second surface; 250, cooling channel; 260, annular groove; 261, bottom wall; 262, side wall; 270, second laser channel;

[0042] 300, cooling gap; 310, first gap; 320, second gap;

[0043] 400, Anti-stick and heat-resistant coating. DETAILED DESCRIPTION

[0044] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0045] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present invention are only used to explain the relative position relationship, movement status, etc. between the various components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0046] In addition, the descriptions of "first," "second," etc. in this utility model are for descriptive purposes only and should not be understood as indicating or implying their relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features specified as "first" or "second" may explicitly or implicitly include at least one of the aforementioned features. In addition, the technical solutions between the various embodiments may be combined with each other, but this must be based on the fact that they can be implemented by ordinary technicians in this field. When the combination of technical solutions is mutually 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 utility model.

[0047] The present invention discloses a laser processing system capable of performing laser processing techniques such as laser cutting and laser welding on a workpiece. The laser processing system of one embodiment includes a laser head and a laser processing head. The laser processing head is configured to eject a laser beam emitted by the laser head, thereby laser processing the workpiece using the laser beam.

[0048] In one embodiment, see Figures 1 to 11 The laser processing head includes a support body 100 and a nozzle 200. The nozzle 200 includes an injection side 210 and a mounting side 220 that are oppositely arranged, and a main body 230 arranged between the injection side 210 and the mounting side 220. The mounting side 220 is detachably connected to the end of the support body 100 close to the nozzle 200, and has a cooling gap 300 between the end of the support body 100 close to the nozzle 200. A cooling groove 240 is provided on the outer peripheral wall of the main body 230, and a cooling channel 250 connecting the cooling groove 240 and the cooling gap 300 is provided in the main body 230. A blowing hole 110 is provided at the end of the support body 100 close to the nozzle 200.

[0049] In this embodiment, the blowing hole 110 is used to blow out a cooling airflow to the mounting side 220 , a portion of the cooling airflow is discharged under the guidance of the cooling gap 300 , and another portion of the cooling airflow is transmitted to the cooling groove 240 through the cooling channel 250 and discharged under the guidance of the cooling groove 240 .

[0050] It can be understood that since a cooling groove 240 is provided on the outer wall of the main body 230, a cooling channel 250 connecting the cooling groove 240 and the cooling gap 300 is provided in the main body 230, and the blowing hole 110 blows out a cooling airflow to the mounting side 220. A part of the cooling airflow is discharged under the guidance of the cooling gap 300, thereby realizing the cooling of the first layer of nozzles 200, and another part of the cooling airflow is transmitted to the cooling groove 240 through the cooling channel 250 and discharged under the guidance of the cooling groove 240, thereby realizing the cooling of the second layer of nozzles 200. Through double-layer nozzle cooling, the cooling and cooling effect of the nozzle 200 can be improved and the service life of the nozzle 200 can be extended.

[0051] Because the double-layer nozzle provides superior cooling, it increases the operating time of the nozzle 200, thereby improving the processing performance of the laser processing head in laser processes such as laser cutting and laser welding. Furthermore, since the cooling channel 240 is disposed between the injection side 210 and the mounting side 220, the distance between the cooling position and the injection side 210 can be reduced, further enhancing the cooling effect on the injection side 210 of the nozzle 200.

[0052] In one embodiment, see Figures 7 to 11 An annular groove 260 is provided on the mounting side 220. The groove wall of the annular groove 260 and the support body 100 are enclosed to form a cooling gap 300. When the cooling air flow flows out through the cooling gap 300, the mounting side 220 of the nozzle 200 can be cooled, thereby realizing the cooling of the first layer of nozzles 200.

[0053] Furthermore, in this embodiment, the annular groove 260 includes a bottom wall 261 arranged opposite to the end of the support body 100 close to the nozzle 200, and a side wall 262 arranged opposite to the outer peripheral wall of the support body 100; in this embodiment, a laser channel is opened in the nozzle 200, which passes through the injection side 210 and the installation side 220, and the center line of the laser channel forms the axis of the nozzle 200.

[0054] The cooling gap 300 includes a first gap 310 formed by the bottom wall 261 and the end of the support body 100 close to the nozzle 200, and a second gap 320 formed by the side wall 262 and the outer peripheral wall of the support body 100. The first gap 310 extends in a direction perpendicular to the axis of the nozzle 200, and the second gap 320 extends in a direction parallel to the axis of the nozzle 200, so that the cooling airflow first flows along the first gap 310 and then flows along the second gap 320. After being discharged from the second gap 320, the cooling airflow can also blow along the outer peripheral wall of the support body 100, thereby increasing the cooling effect of the cooling airflow on the support body 100.

[0055] Of course, in other embodiments, the side wall 262 of the annular groove 260 may also be enclosed with the outer peripheral wall of the support body 100 to form a heat dissipation gap, and the extension direction of the heat dissipation gap is set at an acute angle to the axis of the nozzle 200.

[0056] In one embodiment, see Figure 7 and Figure 8 The cooling channel 240 is an annular channel, and the cooling channel 240 includes an inner edge portion 241 close to the axis of the nozzle 200, an opening portion 242 opened on the outer peripheral wall of the main body 230, and an extension section 243 connecting the inner edge portion 241 and the opening portion 242, so that the cooling airflow can be discharged from the inner edge portion 241 to the opening portion 242, ensuring the cooling area of ​​the nozzle 200 by the cooling airflow.

[0057] Compared with the cooling solution in the prior art, in which the cooling airflow only cools the installation side 220, since the nozzle 200 of this embodiment is also provided with a cooling channel 240, the cooling effect of the cooling airflow on the nozzle 200 is increased through the cooling channel 240, so that on the basis of the existing cooling solution, the temperature can be further reduced by more than 10°C to solve the problem of the nozzle 200 being easily overheated and burned.

[0058] In this embodiment, the groove wall of the cooling channel 240 close to the support body 100 forms a first surface 244, and the groove wall of the cooling channel 240 away from the support body 100 forms a second surface 245. The extension section 243 is an extension channel formed by the first surface 244 and the second surface 245. In the process of the cooling airflow flowing through the extension section 243, the cooling airflow can cool the first surface 244 and the second surface 245, thereby increasing the cooling effect of the nozzle 200.

[0059] Furthermore, the extension section 243 extends perpendicularly to the axis of the nozzle 200, thereby discharging the cooling airflow perpendicularly to the axis of the nozzle 200. This simplifies manufacturing and reduces costs. Of course, in other embodiments, the extension section 243 can also extend at an acute angle to the axis of the nozzle 200 to increase the length of the extension section 243, thereby increasing the cooling area of ​​the nozzle 200 by the cooling airflow.

[0060] In one embodiment, see Figures 7 to 11 The cooling channel 250 extends from the annular groove 260 to the inner edge portion 241 of the cooling channel 240 to transmit the cooling airflow from the cooling gap 300 to the cooling channel 240, thereby increasing the cooling area of ​​the nozzle 200 by the cooling airflow through the cooling channel 240, thereby improving the cooling effect on the nozzle 200.

[0061] Furthermore, in this embodiment, multiple cooling channels 250 are provided and arranged in a circle around the axis of the nozzle 200, thereby using multiple cooling channels 250 to transmit the cooling airflow into the cooling channel 240. Specifically, the cooling channels 250 extend parallel to the axis of the nozzle 200, which facilitates processing and reduces costs. Of course, in other embodiments, the cooling channels 250 may extend at an acute angle to the axis of the nozzle 200, or the cooling channels 250 may be arranged in a spiral shape.

[0062] In one embodiment, see Figures 4 to 11 The nozzle 200 is a bevel nozzle 200. It is understandable that the existing bevel nozzle 200 has a relatively long extension length in the axial direction. When the cooling airflow only cools the surface of the mounting side 220, the injection side 210 of the nozzle 200 is far away from the cooling airflow, which will result in poor cooling effect on the injection side 210 of the nozzle 200. In this embodiment, a cooling channel 240 is additionally provided between the injection side 210 and the mounting side 220. The provision of the cooling channel 240 can reduce the distance between the cooling position and the injection side 210, thereby enhancing the cooling effect of the injection side 210 of the nozzle 200. Of course, in other embodiments, please refer to Figures 1 to 3 , the nozzle 200 can also be a common nozzle.

[0063] In one embodiment, see Figures 4 to 11 A connecting structure 221 for detachable connection with the support body 100 is formed on the mounting side 220. The connecting structure 221 is a first threaded structure. The inner cavity of the support body 100 is provided with a second threaded structure adapted to the first threaded structure so that the nozzle 200 can be threadedly connected to the support body 100.

[0064] In this embodiment, a first laser channel 150 is provided in the support body 100 , and a second laser channel 270 connected to the first laser channel 150 is provided in the nozzle 200 .

[0065] Specifically, the support body 100 includes a first support structure 120 and a second support structure 130 detachably connected to the first support structure 120. The first support structure 120 defines a cavity 121 and a mounting port communicating with the cavity 121. The laser processing head also includes a mounting ring 140 disposed within the cavity 121 and abutting against a stopper protrusion of the cavity 121. The second support structure 130 is threadedly connected to the mounting ring 140 to detachably connect the first support structure 120 and the second support structure 130. The support body 100 may optionally be a ceramic ring.

[0066] In one embodiment, see Figure 2 and Figure 10 The outer wall of the nozzle 200 is provided with an anti-stick and heat-resistant coating 400. The anti-stick and heat-resistant coating 400 can be a Teflon coating, an aluminum oxide coating, a ceramic coating, or a diamond coating. Teflon coatings offer excellent resistance to high and low temperatures, corrosion, abrasion, and adhesion. The anti-stick and heat-resistant coating 400 prevents spatter from adhering to the outer wall of the nozzle 200, reducing the thermal impact of the spatter on the nozzle 200. Furthermore, the non-stick effect of the anti-stick and heat-resistant coating 400 keeps the surface of the nozzle 200 clean, extending the service life of the nozzle 200.

[0067] The above disclosure is only a preferred embodiment of the present invention, and certainly cannot be used to limit the scope of rights of the present invention. Therefore, equivalent changes made according to the claims of the present invention are still within the scope covered by the present invention.

Claims

1. A laser processing head, characterized in that: The laser processing head includes a support body and a nozzle, the nozzle includes an injection side and a mounting side arranged opposite to each other, and a main body portion arranged between the injection side and the mounting side, the mounting side is detachably connected to the end of the support body close to the nozzle side, and a cooling gap is formed between the mounting side and the end of the support body close to the nozzle side, a cooling groove is formed on the outer peripheral wall of the main body portion, a cooling channel connecting the cooling groove and the cooling gap is formed in the main body portion, and an air blowing hole is provided at the end of the support body close to the nozzle side; The blowing hole is used to blow out a cooling airflow to the mounting side, a portion of the cooling airflow is discharged under the guidance of the cooling gap, and another portion of the cooling airflow is transmitted to the cooling channel through the cooling passage and discharged under the guidance of the cooling channel.

2. The laser processing head according to claim 1, characterized in that An annular groove is provided on the mounting side, and the groove wall of the annular groove and the support body are combined to form the cooling gap.

3. The laser processing head according to claim 2, characterized in that The annular groove includes a bottom wall disposed opposite to the end of the support body close to the nozzle, and a side wall disposed opposite to the outer peripheral wall of the support body; A laser channel is provided in the nozzle and passes through the injection side and the mounting side, and a center line of the laser channel forms an axis of the nozzle; The cooling gap includes a first gap formed by the bottom wall and the end of the support body close to the nozzle, and a second gap formed by the side wall and the outer peripheral wall of the support body. The first gap extends in a direction perpendicular to the axis of the nozzle, and the second gap extends in a direction parallel to the axis of the nozzle.

4. The laser processing head according to claim 2, characterized in that A laser channel is provided in the nozzle and passes through the injection side and the mounting side, and a center line of the laser channel forms an axis of the nozzle; The cooling channel is an annular channel, comprising an inner edge portion close to the axis of the nozzle, an opening portion opened on the outer peripheral wall of the main body, and an extension section connecting the inner edge portion and the opening portion; The groove wall of the cooling channel close to the support body forms a first surface, the groove wall of the cooling channel away from the support body forms a second surface, and the extension section is an extension channel formed by the first surface and the second surface.

5. The laser processing head according to claim 4, characterized in that The extending direction of the extension section is perpendicular to the axial direction of the nozzle; and / or, The cooling channel extends from the annular groove to the inner edge of the cooling channel.

6. The laser processing head according to claim 1, characterized in that A laser channel is provided in the nozzle and passes through the injection side and the mounting side, and a center line of the laser channel forms an axis of the nozzle; A plurality of cooling channels are provided and are arranged around the axis of the nozzle; and / or an extension direction of the cooling channel is parallel to the axis of the nozzle.

7. The laser processing head according to any one of claims 1 to 6, characterized in that The nozzle is a bevel nozzle.

8. The laser processing head according to claim 1, characterized in that A connection structure for detachably connecting to the support body is formed on the mounting side, the connection structure is a first thread structure, and the inner cavity of the support body is provided with a second thread structure adapted to the first thread structure; and / or, The support body includes a first support structure and a second support structure detachably connected to the first support structure, wherein the first support structure is provided with a cavity and a mounting port communicating with the cavity; The laser processing head further includes a mounting ring, which is disposed in the cavity and abuts against a limiting protrusion of the cavity, and the second supporting structure is threadedly connected to the mounting ring.

9. The laser processing head according to claim 1, characterized in that The outer wall of the nozzle is provided with an anti-stick and heat-resistant coating, and the anti-stick and heat-resistant coating is a Teflon coating, an aluminum oxide coating, a ceramic coating or a diamond coating.

10. A laser processing system, characterized in that: The laser processing system includes a laser head and the laser processing head according to any one of claims 1 to 9, wherein the laser processing head is used to eject the laser beam emitted by the laser head.

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