CN111958136A - Method for preventing laser head pollution - Google Patents
Method for preventing laser head pollution Download PDFInfo
- Publication number
- CN111958136A CN111958136A CN202010795622.3A CN202010795622A CN111958136A CN 111958136 A CN111958136 A CN 111958136A CN 202010795622 A CN202010795622 A CN 202010795622A CN 111958136 A CN111958136 A CN 111958136A
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- Prior art keywords
- laser head
- gas
- assembly
- preventing
- protective
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K26/00—Working by laser beam, e.g. welding, cutting or boring
- B23K26/70—Auxiliary operations or equipment
- B23K26/702—Auxiliary equipment
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K26/00—Working by laser beam, e.g. welding, cutting or boring
- B23K26/02—Positioning or observing the workpiece, e.g. with respect to the point of impact; Aligning, aiming or focusing the laser beam
- B23K26/06—Shaping the laser beam, e.g. by masks or multi-focusing
- B23K26/064—Shaping the laser beam, e.g. by masks or multi-focusing by means of optical elements, e.g. lenses, mirrors or prisms
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K26/00—Working by laser beam, e.g. welding, cutting or boring
- B23K26/14—Working by laser beam, e.g. welding, cutting or boring using a fluid stream, e.g. a jet of gas, in conjunction with the laser beam; Nozzles therefor
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K26/00—Working by laser beam, e.g. welding, cutting or boring
- B23K26/36—Removing material
- B23K26/38—Removing material by boring or cutting
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Plasma & Fusion (AREA)
- Mechanical Engineering (AREA)
- Laser Beam Processing (AREA)
Abstract
The invention discloses a method for preventing laser head pollution, which is realized by adopting a device for preventing the laser head pollution, wherein the device comprises a laser head, an air supply assembly, a control assembly and a detection assembly, the air supply assembly is connected with the inside of the laser head, the detection assembly is connected between the laser head and the control assembly, a focusing mirror is arranged in the laser head, and a protective mirror is arranged below the focusing mirror; the method comprises the following steps: s1, detecting whether the protective glasses are taken down by the detection assembly, if not, repeating the step S1, and if so, entering the step S2; s2, the control component controls the gas supply component to supply gas to the inside of the laser head, so that a positive pressure environment is formed inside the laser head; s3, detecting whether the protective glass is reset by the detecting component, if not, returning to the step S2, and if so, entering the step S4; s4, the control component controls the air supply component to stop supplying air to the inside of the laser head, the laser head protection device has the effects of protecting the focusing lens when the protection lens of the laser head is replaced and preventing the laser head from being polluted.
Description
Technical Field
The invention relates to the field of laser cutting, in particular to a method for preventing laser head pollution.
Background
In recent years, a processing method called remote laser processing, in which laser light is irradiated from a position away from a processing point to the processing point to perform laser welding using laser light having a long focal length, has been attracting attention. The two most important parameters of laser machining are laser output power and beam quality, where the performance of the focusing lens inside the laser cutting head has the greatest impact on output power and beam quality. For the laser head, the dust-proof sealing performance of the focusing lens can seriously affect the performance of the focusing lens.
Generally, a fiber laser head used in remote laser processing has a protective lens behind a focusing lens to prevent the focusing lens from being contaminated.
Since the protective lens is in contact with the cutting gas and the external environment, it is very easily contaminated and the replacement frequency is very high. The protection lens needs to be taken out when being replaced, the focusing lens can be in contact with the external environment at the moment, the pollution of the focusing lens is caused, other optical lenses can be polluted, the light path is difficult to clean thoroughly, and therefore a method for protecting the focusing lens and preventing laser head pollution when the protection lens is replaced needs to be provided.
Disclosure of Invention
In order to achieve the purpose, the technical scheme adopted by the invention is as follows:
a method for preventing laser head pollution is realized by adopting a device for preventing laser head pollution, the device for preventing laser head pollution comprises a laser head, an air supply assembly, a control assembly and a detection assembly, the air supply assembly is connected with the inside of the laser head, the detection assembly is connected between the laser head and the control assembly, a focusing mirror is arranged in the laser head, and a protective mirror is arranged below the focusing mirror; the method comprises the following steps:
s1, the detection component detects whether the protective glass is removed, if the protective glass is not removed, the step S1 is repeated, and if the protective glass is removed, the step S2 is carried out;
s2, the control component controls the gas supply component to supply gas to the inside of the laser head, so that a positive pressure environment is formed inside the laser head;
s3, the detection component detects whether the protective glasses are reset, if the protective glasses are not reset, the step returns to S2, and if the protective glasses are reset, the step goes to S4;
s4, the control assembly controls the gas supply assembly to stop supplying gas to the inside of the laser head.
Preferably, the control assembly comprises a numerical control system and a control valve, the control valve is connected with the gas supply assembly, and the numerical control system is arranged between the control valve and the detection assembly.
Preferably, the detection assembly comprises a plurality of proximity switches and a signal feedback system, the proximity switches are arranged at the protective glasses, and the signal feedback system is arranged between the proximity switches and the numerical control system.
Preferably, the proximity switch is a distance-sensitive proximity switch driven by electric power, and the sensing distance of the proximity switch is 2 mm.
Preferably, the model of the proximity switch is IFRM06N 17131/L.
Preferably, the control valve is a proportional valve.
Preferably, the air supply assembly comprises an air source and an air pipe, one end of the air pipe is connected to the air source, and the other end of the air pipe is connected to the inside of the laser head.
Preferably, the gas provided by the gas source is an inert gas.
Preferably, the inert gas is helium.
Compared with the prior art, the invention has the beneficial technical effects that:
1. according to the method for preventing the laser head from being polluted, after the protective mirror is taken away, the proximity switch detects that the interior of the laser head is communicated with the external environment, the signal feedback system feeds the detection result of the proximity switch back to the numerical control system, the numerical control system opens the control valve according to the information fed back by the signal feedback system, and the gas of the gas source continuously enters the interior of the laser head, so that a positive pressure environment is formed in the interior of the laser head, and pollutants in the external environment cannot enter the interior of the laser head, so that the pollution to a light path, a focusing lens and other lenses in the interior of the laser head is avoided, the laser head does not need to be cleaned frequently;
2. the gas supply assembly is connected with the inside of the laser head, the detection assembly is connected between the laser head and the control assembly, and the gas supply assembly, the control assembly and the detection assembly are cooperatively matched, so that the laser head has the capability of better keeping self cleanliness, the frequency of cleaning the laser head by a user is reduced, and the use satisfaction degree of the user is improved;
3. the control valve is connected with the gas supply assembly, and the numerical control system is arranged between the control valve and the detection assembly, so that the numerical control system can adjust the state of the control valve as soon as possible according to the signal of the detection assembly;
4. the proximity switch is arranged at the protective mirror, and the signal feedback system is arranged between the proximity switch and the numerical control system, so that the proximity switch can detect the situation as early as possible after the protective mirror is taken away, and the laser head is kept in a clean state;
5. by using the proportional valve as the control valve, the pressure of the gas flowing into the laser head can be conveniently controlled.
6. Through connecting trachea one end in the air supply, the trachea other end is connected inside the laser head, and the gaseous helium of confirming that the air supply provided for the gas that the air feed subassembly provided can not cause the damage to the laser head inside when maintaining the inside cleanness of laser head.
Drawings
FIG. 1 is a schematic flow chart of a method for preventing contamination of a laser head according to the present invention;
FIG. 2 is a sectional view showing a schematic structure of an apparatus for preventing contamination of a laser head according to the present invention;
fig. 3 is a schematic view of the gas flow inside the apparatus for preventing contamination of the laser head according to the present invention.
Wherein, the technical characteristics that each reference numeral refers to are as follows:
1. a laser head; 11. a focusing mirror; 12. protective glasses; 2. a gas supply assembly; 21. a gas source; 22. an air tube; 3. a control component; 31. a numerical control system; 32. a control valve; 4. a detection component; 41. a proximity switch; 42. a signal feedback system.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail with reference to the following embodiments, but the scope of the present invention is not limited to the following embodiments.
The first embodiment is as follows: referring to fig. 1 to 3, the embodiment discloses a method for preventing laser head pollution, which adopts a device for preventing laser head pollution, and comprises a laser head 1, an air supply assembly 2, a control assembly 3 and a detection assembly 4, wherein the air supply assembly 2 is connected with the inside of the laser head 1, and the detection assembly 4 is connected between the laser head 1 and the control assembly 3.
The control assembly 3 comprises a numerical control system 31 and a control valve 32, the control valve 32 is connected with the gas supply assembly 2, the numerical control system 31 is arranged between the control valve 32 and the detection assembly 4, a focusing lens 11 is detachably connected in the laser head 1, a protective lens 12 is detachably connected below the focusing lens 11, and the detection assembly 4 is fixedly arranged at the protective lens 12 of the laser head 1.
The detection assembly 4 includes a plurality of proximity switches 41 and a signal feedback system 42, in this embodiment, the proximity switches 41 are electrically driven distance sensing type proximity switches 41, the sensing distance of the proximity switches 41 is 2mm, the model of the proximity switches 41 is IFRM06N17131/L, the number of the proximity switches 41 is one, in other embodiments, the number of the proximity switches 41 may be increased according to actual situations, the proximity switches 41 are fixedly connected to the protective glasses 12, the distance between the proximity switches 41 and the protective glasses 12 is less than 2mm, and the signal feedback system 42 is disposed between the proximity switches 41 and the numerical control system 31.
The gas supply assembly 2 comprises a gas source 21 and a gas pipe 22, one end of the gas pipe 22 is connected to the gas source 21, the other end of the gas pipe 22 is connected to a position between the focusing lens 11 and the proximity switch 41 inside the laser head 1, the gas pipe 22 is communicated with the gas source 21 and the inside of the laser head 1, a control valve 32 is fixedly connected to the gas pipe 22, and the gas provided by the gas source 21 is inert gas, in this embodiment, the inert gas is preferably helium, and in other embodiments, the inert gas can be selected according to actual conditions.
The method comprises the following specific steps:
s1, the detecting module 4 detects whether the protective glass 12 is removed, if the protective glass 12 is not removed, the step S1 is repeated, and if the protective glass 12 is removed, the process goes to step S2;
s2, the control component 4 controls the gas supply component 2 to supply gas to the inside of the laser head 1, so that a positive pressure environment is formed inside the laser head 1;
s3, the detection component 4 detects whether the protective glass 12 is reset, if the protective glass 12 is not reset, the step returns to S2, and if the protective glass 12 is reset, the step proceeds to S4;
s4, the control component 4 controls the gas supply component 2 to stop supplying gas to the inside of the laser head 1.
The working process of the device comprises the following steps:
when the protective glass 12 needs to be replaced, the protective glass 12 is taken down, the distance between the proximity switch 41 and the protective glass 12 exceeds 2mm, the proximity switch 41 detects that the protective glass 12 is taken down, the inside of the laser head 1 is communicated with the external environment, the signal feedback system 42 connected with the proximity switch 41 feeds corresponding signals communicated with the inside of the laser head 1 and the external environment back to the numerical control system 31, after the signals communicated with the inside of the laser head 1 and the external environment are received, the numerical control system 31 operates the control valve 32 to be opened, the air pipe 22 is communicated with the air source 21 and the inside of the laser head 1, air in the air source 21 enters the inside of the laser head 1 through the air pipe 22, a positive pressure environment is formed inside the laser head 1, impurities in the external environment cannot enter the inside of the laser head 1 when the protective glass 12 is taken down, and the laser head 1.
When the protective glasses 12 are normally installed, the distance between the proximity switch 41 and the protective glasses 12 is not more than 2mm, the proximity switch 41 detects that the protective glasses 12 are normally installed, the inside of the laser head 1 is not communicated with the external environment, the signal feedback system 42 connected with the proximity switch 41 feeds back the corresponding signal that the inside of the laser head 1 is not communicated with the external environment to the numerical control system 31, after receiving the signal that laser head 1 inside and external environment communicate, numerical control system 31 operation control valve 32 closes, and trachea 22 can't communicate inside air supply 21 and the laser head 1, and inside the gas in the air supply 21 stopped to enter into laser head 1 through trachea 22, the malleation environment of the inside of laser head 1 disappeared, avoided in the gas source in the air supply 21 constantly gets into laser head 1, lead to the situation emergence that the pressure is too high and cause the damage to overall structure in laser head 1.
Variations and modifications to the above-described embodiments may occur to those skilled in the art, which fall within the scope and spirit of the above description. Therefore, the present invention is not limited to the specific embodiments disclosed and described above, and some modifications and variations of the present invention should fall within the scope of the claims of the present invention. Furthermore, although specific terms are employed herein, they are used in a generic and descriptive sense only and not for purposes of limitation.
Claims (9)
1. A method for preventing laser head pollution is realized by adopting a device for preventing laser head pollution, and is characterized in that the device for preventing laser head pollution comprises a laser head (1), an air supply assembly (2), a control assembly (3) and a detection assembly (4), the air supply assembly (2) is connected with the inside of the laser head (1), the detection assembly (4) is connected between the laser head (1) and the control assembly (3), a focusing lens (11) is arranged in the laser head (1), and a protective lens (12) is arranged below the focusing lens (11); the method comprises the following steps:
s1, the detection module (4) detects whether the protective glass (12) is removed, if the protective glass (12) is not removed, the step S1 is repeated, and if the protective glass (12) is removed, the step S2 is carried out;
s2, the control component (4) controls the gas supply component (2) to supply gas to the inside of the laser head (1) so that a positive pressure environment is formed inside the laser head (1);
s3, the detection component (4) detects whether the protective glass (12) is reset, if the protective glass (12) is not reset, the step returns to S2, and if the protective glass (12) is reset, the step proceeds to S4;
s4, the control component (4) controls the gas supply component (2) to stop supplying gas to the inside of the laser head (1).
2. A method for preventing laser head contamination according to claim 1, characterized in that the control unit (3) comprises a numerical control system (31) and a control valve (32), the control valve (32) being connected to the gas supply unit (2), the numerical control system (31) being arranged between the control valve (32) and the detection unit (4).
3. A method for preventing laser head contamination according to claim 2, characterized in that the detection assembly (4) comprises proximity switches (41) and a signal feedback system (42), the proximity switches (41) being arranged at the protective mirror (12), the signal feedback system (42) being arranged between the proximity switches (41) and the numerical control system (31).
4. A method of preventing laser head contamination according to claim 3, wherein the proximity switch (41) is an electrically driven distance sensitive proximity switch (41), the proximity switch (41) having a sensing distance of 2 mm.
5. A method of preventing laser head contamination according to claim 4, wherein the proximity switch (41) is of the type IFRM06N 17131/L.
6. A method of preventing laser head contamination according to claim 2, wherein the control valve (32) is a proportional valve.
7. A method for preventing laser head contamination according to claim 1, wherein the gas supply module (2) comprises a gas source (21) and a gas pipe (22), one end of the gas pipe (22) is connected to the gas source (21), and the other end of the gas pipe (22) is connected to the inside of the laser head (1).
8. A method of preventing laser head contamination according to claim 7, wherein the gas provided by the gas source (21) is an inert gas.
9. The method of claim 8 in which the inert gas is helium.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010795622.3A CN111958136A (en) | 2020-08-10 | 2020-08-10 | Method for preventing laser head pollution |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010795622.3A CN111958136A (en) | 2020-08-10 | 2020-08-10 | Method for preventing laser head pollution |
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| Publication Number | Publication Date |
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| CN111958136A true CN111958136A (en) | 2020-11-20 |
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| CN202010795622.3A Pending CN111958136A (en) | 2020-08-10 | 2020-08-10 | Method for preventing laser head pollution |
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Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201573009U (en) * | 2009-11-24 | 2010-09-08 | 深圳市大族激光科技股份有限公司 | Laser processing head |
| CN102248291A (en) * | 2011-06-16 | 2011-11-23 | 河北工业大学 | Laser welding head device with three-dimensionally adjusted gas curtain seal and implementation method thereof |
| CN202684328U (en) * | 2011-12-13 | 2013-01-23 | 贵州黎阳航空动力有限公司 | Shielding gas curtain for laser welding |
| CN104759754A (en) * | 2015-04-14 | 2015-07-08 | 大族激光科技产业集团股份有限公司 | Laser processing equipment applied to circular tube materials |
| CN207656084U (en) * | 2017-12-22 | 2018-07-27 | 武汉云德科技有限公司 | A kind of laser welding head |
| CN207930153U (en) * | 2017-12-11 | 2018-10-02 | 深圳市海目星激光智能装备股份有限公司 | A kind of dual-beam laser welding device |
| CN108788453A (en) * | 2018-06-19 | 2018-11-13 | 深圳市万顺兴科技有限公司 | A kind of recombination laser plumb joint |
| CN110328457A (en) * | 2019-07-26 | 2019-10-15 | 扬州江峰机械制造有限公司 | A kind of focusing lens protective device of laser cutting machine |
| CN110449736A (en) * | 2019-09-12 | 2019-11-15 | 苏州市宏石激光技术有限公司 | The side-blown dust-proof laser nozzle of one kind and its control method |
-
2020
- 2020-08-10 CN CN202010795622.3A patent/CN111958136A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201573009U (en) * | 2009-11-24 | 2010-09-08 | 深圳市大族激光科技股份有限公司 | Laser processing head |
| CN102248291A (en) * | 2011-06-16 | 2011-11-23 | 河北工业大学 | Laser welding head device with three-dimensionally adjusted gas curtain seal and implementation method thereof |
| CN202684328U (en) * | 2011-12-13 | 2013-01-23 | 贵州黎阳航空动力有限公司 | Shielding gas curtain for laser welding |
| CN104759754A (en) * | 2015-04-14 | 2015-07-08 | 大族激光科技产业集团股份有限公司 | Laser processing equipment applied to circular tube materials |
| CN207930153U (en) * | 2017-12-11 | 2018-10-02 | 深圳市海目星激光智能装备股份有限公司 | A kind of dual-beam laser welding device |
| CN207656084U (en) * | 2017-12-22 | 2018-07-27 | 武汉云德科技有限公司 | A kind of laser welding head |
| CN108788453A (en) * | 2018-06-19 | 2018-11-13 | 深圳市万顺兴科技有限公司 | A kind of recombination laser plumb joint |
| CN110328457A (en) * | 2019-07-26 | 2019-10-15 | 扬州江峰机械制造有限公司 | A kind of focusing lens protective device of laser cutting machine |
| CN110449736A (en) * | 2019-09-12 | 2019-11-15 | 苏州市宏石激光技术有限公司 | The side-blown dust-proof laser nozzle of one kind and its control method |
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Application publication date: 20201120 |