CN102756214B - Laser perforation method - Google Patents
Laser perforation method Download PDFInfo
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- CN102756214B CN102756214B CN201110110509.8A CN201110110509A CN102756214B CN 102756214 B CN102756214 B CN 102756214B CN 201110110509 A CN201110110509 A CN 201110110509A CN 102756214 B CN102756214 B CN 102756214B
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- laser
- perforation
- cutting head
- perforation method
- laser cutting
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Abstract
The invention provides a laser perforation process which is implemented by a laser cutting system. The system comprises a fiber laser, a laser cutting head, an electromagnetic valve and an air pipe, wherein the electromagnetic valve is connected with the laser cutting head, and the air pipe is connected to a position from a gas outlet of the electromagnetic valve to an auxiliary gas inlet of the cutting head. By the aid of the laser perforation process implemented by the laser cutting system, the peak power of laser pulse, low frequency and high duty ratio are matched, the set frequency ranges from 5Hz to 10Hz, and the duty ratio ranges from 60% to 90%. The laser perforation process has the advantages that perforation action is continuous, retention time is almost zero, the influence of slopping of the surface of a steel pipe on cutting is decreased, and perforation efficiency and stability are high.
Description
[technical field]
The present invention relates to high power laser cutting field, especially a kind of laser perforation method, is usually used in panel beating.
[background technology]
Laser cutting is, with focusing lens, laser beam focus is made material molten at material surface, blow away the spray slag be melted for the Compressed Gas that laser beam is coaxial simultaneously, and make laser beam and material do relative motion along certain track, thus form certain joint-cutting to realize laser cutting; But all cuttings could form cutting after must coming from sheet material perforation; In other words want cutting stablizing effect good, perforation is first; So perforation holds an important position in laser cutting, it affects the effect of cutting, the efficiency of production, the stability of cutting.
The peak value of laser pulse, frequency, dutycycle this itself be the function that optical fiber laser itself possesses; How these three kinds of inherent functions are used for perforation; First, the principle of perforation utilizes the pulse peak power of laser under certain frequency, clash into metal surface make metal material melting or become plasma vapor, forms perforation; Traditional perforation means is high-frequency low duty ratio, and quality of boring a hole like this can ensure but piercing efficiency is too low; And metal molten can be formed perforation by high duty ratio really very soon, but be widely applied too much and not because the number of times of energy excessive pulse impact too much causes perforated surface to spray slag; And the aperture of the general cutting head of laser cutting is 1.5-3.5mm, too low for the gas pressure of producing by boasting in cutting head, metal plasma steam and splash just can enter in cutting head along cutting head and be splashed on eyeglass; Metallic high temperature slag is splashed on cutting head and easily causes cutting torch to block or damage.Spray slag number directly have influence on the quality of cutting.
For reaching the object of perforation fast, the assist gas of applicable pressure usually can be furnished with at laser cutting head, as O
2.And the response of boring a hole fast for gas requires higher, in order to safety air pressure before bright dipping of eyeglass must be full of in cutting head in advance, eyeglass is polluted to prevent plasma vapor, and under cutting air pressure and the different situation of perforation air pressure, in order to enter cut state fast after penetrating, air pressure must be made to increase from perforation air pressure rapidly or be reduced to the setting value of cutting air pressure.And traditional machine tool magnetic valve probably has 1.2 meters to cutting head air intake, the response speed of gas does not reach the requirement of perforation fast.
[summary of the invention]
For above-mentioned problem, the invention provides a kind of laser perforation method.The present invention can perforating action more coherent, the time of staying is almost nil, improve working (machining) efficiency.
Laser perforation method of the present invention, rely on a laser cutting system to realize, this system comprises an optical fiber laser, laser cutting head, the magnetic valve be connected with laser cutting head, is connected to the tracheae of magnetic valve gas outlet place to cutting head assist gas air intake place;
Laser perforation method by means of this laser cutting system is:
The coupling of the peak power of laser pulse, low frequency and high duty ratio, its setting value be frequency between 5-10HZ, dutycycle is between 60%-90%.
The invention has the beneficial effects as follows that perforating action is more coherent, the time of staying is almost nil; Reduce surface of steel plate spray slag to the impact of cutting; Piercing efficiency and stability higher, thus improve crudy.
[accompanying drawing explanation]
In conjunction with embodiment, the invention will be further described with reference to the accompanying drawings.
Fig. 1 is diced system machining state schematic diagram of the present invention;
Fig. 2 is the machining state schematic diagram of the laser cutting head of diced system of the present invention.
[detailed description of the invention]
Main accompanying drawings the specific embodiment of the present invention below.
Embodiment 1, as shown in Figure 1, a kind of laser perforation method that embodiments of the invention provide, rely on a laser cutting system to realize, this system comprises an optical fiber laser 1, laser cutting head 2, the magnetic valve 4 be connected with laser cutting head 2, is connected to the tracheae 3 of magnetic valve 4 gas outlet place to cutting head 2 assist gas air intake place.Laser perforation method by means of this laser cutting system adopts the peak power of laser pulse, low frequency and high duty ratio to mate, and be set as that frequency is between 5-10Hz, dutycycle is between 60%-90%.The pulse peak power of laser clashes into metal surface under certain frequency to be made metal material melting or becomes plasma vapor, forms perforation.
While laser beam perforation, the spray slag b that laser cutting head utilizes Compressed Gas a to blow away to be melted on the direction that laser beam is coaxial, if but air pressure is too small, and spray slag b easily pollutes focusing lens and defective nozzle, the absorbing laser of ionic steam meeting simultaneously, affects cutting effect; If air pressure is excessive, the aperture of perforation can be increased, affect the precision of final cutting.
But usually, falling perforation air pressure can only be reduced to 0.5-0.8bar, the enough not little effect to ensureing focusing lens and nozzle cleaning of air pressure.
Preferably, as shown in Figure 2, in the process of perforation, laser cutting head and cut workpiece have certain perforation spray apart from h, raise this spray distance, and making it is highly 5-10mm.In the present embodiment, adopt the height of non-contact capacitive formula sensor adjustment perforation spray distance, the magnitude of voltage that only need change sensor just can raise perforation spray apart from h.Like this, spray slag b can not be caused focusing lens and defective nozzle is easily polluted because air pressure is too small.
Further, for preventing spray slag b from easily polluting focusing lens and defective nozzle, reduce the aperture D of laser cutting head, it is set as 1.0-1.4mm.
Preferably, shorten the length of tracheae, it is set as 400-600mm.In order to enter cut state fast after penetrating, air pressure must be made to increase from perforation air pressure rapidly or be reduced to the setting value of cutting air pressure, and this setting value determines according to the PLC scan period of system of processing, as long as it is just passable to make assist gas pressure reach setting value within this scan period.Although tracheae reaches the assist gas pressure of setting in the shorter more short time, directly to shorten to zero required time the shortest for tracheae in theory, and the textural of machine cannot reach this requirement.
Embodiment 2 is that the concrete example on the basis of embodiment 1 describes.
In reality processing, the quantity that below 6mm carbon steel sheet processing work is generally bored a hole is very many, shortens the aperture time and also just can enhance productivity significantly.And above-mentioned laser perforation method is for 6mm and following carbon steel sheet Be very effective.Machined parameters is as figure below:
1mm and 2mm carbon steel sheet due to thinner, piercing ratio be easier to thus piercing efficiency new method and aging method difference little.
The time that perforation needs is that the high-peak power of a certain setting is by sheet material fusing or the time forming plasma vapor.
To the perforation of 3mm carbon steel sheet, its peak power is 1200W, and this numerical value is determined by used optical fiber laser, and point cycle is 5-10Hz, and dutycycle is 60-80%, and the aperture time is 50ms, and the tradition aperture time is 800ms.
To the perforation of 4mm carbon steel sheet, its peak power is 2000W, and this numerical value is determined by used optical fiber laser, and point cycle is 5-10Hz, and dutycycle is 60-80%, and the aperture time is 50ms, and the tradition aperture time is 1500ms.
To 5mm – 6mm carbon steel sheet, its high-peak power is 2000W, and point cycle is 5-10Hz, and dutycycle is 60-80%, and the aperture time is 150ms, and the tradition aperture time is 2000ms – 2500ms.
This quick method for punching is utilized for carbon steel perforated, substantially increases the production efficiency of client; Calculate by 6mm carbon steel sheet: a perforation is just for client saves 2.8 second time; 1000 holes are exactly 46 minutes, thus improve production efficiency significantly.
The invention has the beneficial effects as follows that perforating action is more coherent, the time of staying is almost nil; Reduce surface of steel plate spray slag to the impact of cutting; Piercing efficiency and stability higher.
Claims (7)
1. a laser perforation method, rely on a laser cutting system to realize, this system comprises an optical fiber laser, laser cutting head, the magnetic valve be connected with laser cutting head, is connected to the tracheae of magnetic valve gas outlet place to cutting head assist gas air intake place;
Laser perforation method by means of this laser cutting system is characterized in that: being perforated workpiece material is carbon steel;
The coupling of the peak power of laser pulse, low frequency and high duty ratio, its setting value be frequency between 5-10Hz, dutycycle is between 60%-90%.
2. laser perforation method according to claim 1, is characterized in that: described peak power is 1200W.
3. laser perforation method according to claim 1, is characterized in that: described peak power is 2000W.
4. laser perforation method according to claim 1, is characterized in that: in the process of perforation, laser cutting head and be perforated workpiece and have certain perforation spray distance, raises this spray distance, makes it be highly 5-10mm.
5. laser perforation method according to claim 4, is characterized in that: the height adopting non-contact capacitive formula sensor adjustment perforation spray distance.
6. laser perforation method according to claim 1, is characterized in that: the aperture reducing laser cutting head, and described aperture is set as 1.0-1.4mm.
7. laser perforation method according to claim 1, is characterized in that: the length shortening described tracheae, and described length setting is 400-600mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110110509.8A CN102756214B (en) | 2011-04-29 | 2011-04-29 | Laser perforation method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110110509.8A CN102756214B (en) | 2011-04-29 | 2011-04-29 | Laser perforation method |
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| Publication Number | Publication Date |
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| CN102756214A CN102756214A (en) | 2012-10-31 |
| CN102756214B true CN102756214B (en) | 2015-07-01 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201110110509.8A Expired - Fee Related CN102756214B (en) | 2011-04-29 | 2011-04-29 | Laser perforation method |
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Families Citing this family (11)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103170744B (en) * | 2013-04-11 | 2015-10-14 | 大族激光科技产业集团股份有限公司 | Laser soldering device and welding method |
| CN103878494B (en) * | 2014-03-31 | 2016-08-24 | 大族激光科技产业集团股份有限公司 | Laser drilling method and the method for laser cutting through hole |
| CN105081579B (en) * | 2015-08-04 | 2017-10-03 | 大族激光科技产业集团股份有限公司 | A kind of laser processing |
| CN105834598B (en) * | 2016-06-14 | 2017-06-20 | 武汉天琪激光设备制造有限公司 | A kind of method of laser beam perforation steel plate |
| CN106271058B (en) * | 2016-08-29 | 2018-07-27 | 无锡洲翔激光设备有限公司 | Technique of the laser cutting less than plate thickness diameter circular aperture is carried out on plank |
| DE102018204663A1 (en) * | 2018-03-27 | 2019-10-02 | Trumpf Werkzeugmaschinen Gmbh + Co. Kg | Laser cutting process with an increase in cutting nozzle spacing at the cutting end and laser cutting machine and computer program product |
| CN110434478B (en) * | 2018-04-28 | 2021-11-23 | 大族激光科技产业集团股份有限公司 | Treatment method and device for laser cutting slag spraying |
| CN108723613A (en) * | 2018-06-27 | 2018-11-02 | 深圳市光大激光科技股份有限公司 | A kind of method for punching and device for laser cutting |
| CN109530933B (en) * | 2018-11-15 | 2020-11-10 | 无锡洲翔激光设备有限公司 | Process for rapidly perforating and cutting small hole in thick plate |
| CN113118650B (en) * | 2019-12-31 | 2022-03-15 | 江苏亚威机床股份有限公司 | Thick plate laser perforation processing method |
| CN111745311B (en) * | 2020-06-30 | 2022-03-25 | 大族激光科技产业集团股份有限公司 | Laser perforation method, multi-stage perforation method and continuous perforation method |
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| US5770833A (en) * | 1996-01-30 | 1998-06-23 | Mitsubishi Denki Kabushiki Kaisha | Laser cutting method including piercing a work piece with a moving processing head |
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| CN101862903A (en) * | 2010-03-30 | 2010-10-20 | 深圳市大族激光科技股份有限公司 | Laser processing control method and system and laser cutting machine processing system |
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| JPH05111783A (en) * | 1991-10-19 | 1993-05-07 | Fanuc Ltd | Drilling method for laser beam machining |
| JP2001321975A (en) * | 2000-05-11 | 2001-11-20 | Koike Sanso Kogyo Co Ltd | Method of cutting with laser beam |
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Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5770833A (en) * | 1996-01-30 | 1998-06-23 | Mitsubishi Denki Kabushiki Kaisha | Laser cutting method including piercing a work piece with a moving processing head |
| CN1470354A (en) * | 2002-07-24 | 2004-01-28 | 天津市激光技术研究所 | Method for cutting cross-cutting board by pulse laser |
| CN201102127Y (en) * | 2007-12-07 | 2008-08-20 | 北京工业大学 | Laser three-dimensional accurate cutting system of metallic tubule |
| CN101862903A (en) * | 2010-03-30 | 2010-10-20 | 深圳市大族激光科技股份有限公司 | Laser processing control method and system and laser cutting machine processing system |
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| CN102756214A (en) | 2012-10-31 |
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Address after: Dazu laser Building No. 9 Nanshan District high tech Park North new road Shenzhen city Guangdong province 518055 Applicant after: HANS LASER TECHNOLOGY INDUSTRY GROUP CO., LTD. Address before: Dazu laser Building No. 9 Nanshan District high tech Park North new road Shenzhen city Guangdong province 518055 Applicant before: Dazu Laser Sci. & Tech. Co., Ltd., Shenzhen |
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