CN101920399A - Method and device for cutting stainless steel sheet with fiber laser - Google Patents
Method and device for cutting stainless steel sheet with fiber laser Download PDFInfo
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- CN101920399A CN101920399A CN2010102580215A CN201010258021A CN101920399A CN 101920399 A CN101920399 A CN 101920399A CN 2010102580215 A CN2010102580215 A CN 2010102580215A CN 201010258021 A CN201010258021 A CN 201010258021A CN 101920399 A CN101920399 A CN 101920399A
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Abstract
The invention relates to a method and a device for cutting a stainless steel sheet with fiber laser. The method comprises the following steps of: (1) lowering the cutting speed in an initial cutting stage relative to a preset cutting speed; (2) correspondingly adjusting the cutting parameter of the laser in a cutting progress through judging a cutting corner in real time; and (3) automatically controlling a laser to blow auxiliary gas before light output and closing the auxiliary gas after the laser is turned off. The device for cutting the stainless steel sheet with the fiber laser comprises a workbench, the laser, a fiber, a collimator, an image sensor, a display and a control unit. The method and the device for cutting the stainless steel sheet with the fiber laser can be applied to the fiber laser cutting processes of various stainless steel sheets, and the cutting quality of the stainless steel sheets is good; the phenomenon of cut resistance is not easy to appear; the stainless steel sheet has uniform heat radiation and difficult excessive erosion; the protection gas is saved, and the cutting cost is reduced; and the positioning precision is improved, and the cutting process can be monitored in real time.
Description
Technical field
The present invention relates to optical-fiber laser cutting technique field, relate in particular to a kind of method and device of cutting stainless steel sheet with fiber laser.
Background technology
Along with the development of laser technique, optical fiber laser is applied in the every field of Laser Processing with its distinctive advantage.Especially it has good beam quality, and perfectly Gaussian beam is easier to be applied in thin plate cutting field.Generally by software supplier's development and Design of specialty, the control program of exploitation has certain deficiency for present optical-fiber laser cutting equipment, diced system control program.During using, engineering finds that there is following shortcoming in current applied optical-fiber laser diced system.1. control the software aspect: 1., will excessively ablate during the cutting corner, the corner quality is reduced configuring various technological parameters to guarantee under the good situation of straight cuts effect; Particularly low-angle acute angle cutting because cutting path is overlapping, causes laser energy to concentrate, and causes the corner generally can excessively ablate; In order to guarantee the integral cutting quality, will set different parameters at diverse location and cut, parameter modification is comparatively loaded down with trivial details; 2. configuring various technological parameters when guaranteeing that cutting effects are fine, often the phenomenon that occurs not cutting through at the cutting start-up portion also can cause sheet material overheating deforming on every side; Whether 3. existing control program can be controlled assist gas and blow but can not judge whether bright dipping, can not control assist gas and blow when going out laser, do not blow when closing laser.2. generally be to adopt the ruddiness location to the workpiece location of cutting when initial during engineering is used, but existing process equipment can only be observed whether accurate positioning from the side with operating personnel's eyes, setting accuracy is not high like this.
Summary of the invention
Therefore, the object of the present invention is to provide a kind of method and device that improves the cutting stainless steel sheet with fiber laser of cut quality.
For achieving the above object, the invention provides a kind of method of cutting stainless steel sheet with fiber laser, comprising:
Cut corner size, the cutting parameter of corresponding adjustment laser by real-time judge in the step 2. cutting process;
Wherein, in the step 2,, when the little corner of cutting, reduce laser pulse frequency compared to the laser pulse frequency that is used for cutting straight line of initial setting up.
Wherein, if corner is reduced to 85% of the value of setting less than 90 degree and greater than 30 degree with laser pulse frequency; If corner greater than 0 degree, is reduced to 70% of be provided with value with laser pulse frequency smaller or equal to 30 degree.
Wherein, in the step 2, compared to the laser pulse frequency that is used for cutting straight line of initial setting up, keeping the pulse frequency of laser when the big corner of cutting is the initial value of setting.
Wherein, if corner is spent more than or equal to 90 and less than 360 degree, keeping the pulse frequency of laser is the initial value of setting.
Wherein, imageing sensor is set, the realtime graphic of cut surface is passed to display, by adjust the original position of workbench and monitoring cutting process in real time by the observed image of display at the vertical direction of the cut surface of workbench.
The present invention also provides a kind of device of cutting stainless steel sheet with fiber laser, comprise: workbench, laser instrument, optical fiber, collimater, imageing sensor, display and control module, this collimater is positioned on the vertical direction of cut surface of workbench, this collimater is provided with opening and introduces for optical fiber and assist gas, laser that laser instrument sends imports collimater and vertically shines cut surface by collimater via optical fiber, this imageing sensor is positioned on the vertical direction of cut surface and reaches display with the realtime graphic cut surface, and this control module and workbench and laser instrument communicate to connect with the mechanical movement of real-time control workbench and laser output parameters.
Wherein, described imageing sensor is the CCD imaging device.
Wherein, described imageing sensor is positioned at directly over this collimater, aims at the direction of illumination of laser.
In sum, the method for cutting stainless steel sheet with fiber laser of the present invention and device can be applicable to the optical-fiber laser cutting process of all kinds of stainless sheet steels, make cutting obtain good quality; Be not prone to and do not cut through phenomenon; Make the stainless sheet steel heat radiation evenly, be not prone to excessive ablation phenomen; Save the use of protective gas, reduce cutting cost; Improve positioning accuracy and can monitor cutting process in real time.
Description of drawings
Below in conjunction with accompanying drawing,, will make technical scheme of the present invention and other beneficial effects apparent by the specific embodiment of the present invention is described in detail.
In the accompanying drawing,
Fig. 1 is the schematic flow sheet of the control program of method one preferred embodiment of cutting stainless steel sheet with fiber laser of the present invention;
Fig. 2 is the differentiation to different cutting angles of the control program of method one preferred embodiment of cutting stainless steel sheet with fiber laser of the present invention;
Fig. 3 is the structural representation of device one preferred embodiment of cutting stainless steel sheet with fiber laser of the present invention.
The specific embodiment
For realizing automation, the optical-fiber laser cutting adopts digital control scheme to operate usually, numerical control (NC---Numerical Control, digital control) be meant that the digital command of forming with numeral, literal and symbol realizes the technology of one or more plant equipment action control, mechanical quantity such as the normally position that numerical control code is controlled, angle, speed with flow to relevant switching value with mechanical energy.Therefore, the concrete application of the method for cutting stainless steel sheet with fiber laser of the present invention can show by the form of numerical control program.
Fig. 1 is the schematic flow sheet of the control program of a preferred embodiment.Control system is carried out numerical control code according to the NC cutting process of input in advance, to finish cutting operation.As shown in Figure 1, the NC cutting process at first reads the NC cutting codes after starting, and judges whether the code of reading is the bright dipping code, the operation of taking to reduce the operation of cutting speed or not reducing cutting speed according to judged result then.Shown in Figure 1 only is the schematic flow sheet of the control program among this embodiment, and in order to method of the present invention is illustrated, for the concrete cutting control program of having done according to difference cutting work, this flow process also can correspondingly change.
Compared to the method for existing optical-fiber laser cutting stainless steel plate, use the control program of the numerically controlled control system behind the method improvement of the present invention, comprising:
Starting stage in cutting is reduced cutting speed compared to predetermined cutting speed.Increase the cutting speed real time altering function of control program, for control program interpolation speed is adjusted function, when reading the code that goes out laser in the numerical control code, the speed of calling is adjusted function, the cutting speed that reduces to configure is recovered the cutting speed that configures after a period of time is carried out in cutting.That is to say, in the cutting starting stage, because laser is stable not enough, predetermined cutting speed in the technological parameter, the cutting speed that reduces the starting stage can make stainless sheet steel absorb enough laser energies, is unlikely to occur not cutting through phenomenon.
Cut corner size, the cutting parameter of corresponding adjustment laser by real-time judge in the cutting process.Increase the laser parameter real time altering function of control program, when cutting process is read the corner code, judge cutting corner size, adjust different cutting parameters, that is to say,, reduce the laser pulse frequency of corner according to the corner size compared to the laser pulse frequency of straight cuts.When the cutting smaller angle, reduce laser pulse frequency, make the stainless sheet steel heat radiation evenly, be not prone to excessive ablation phenomen.So just be unlikely in less corner, laser energy is too concentrated and is caused wedge angle excessively to ablate.
Corresponding for corner angle and laser pulse frequency can be specifically selected according to actual needs, for example: if corner more than or equal to 90 degree and less than 360 degree, control program does not change laser parameter, continues to carry out next code; If corner is less than 90 degree and greater than 30 degree, control program is reduced to laser pulse frequency 85% of the value of setting automatically; If greater than 0 degree, control program is reduced to laser pulse frequency 70% of the value of setting to corner automatically less than 30 degree.
Fig. 2 is the differentiation to different cutting angles of the control program of method one preferred embodiment of cutting stainless steel sheet with fiber laser of the present invention, dash area is represented the material that palpus is removed among Fig. 2, blank parts is represented required workpiece, also can come the corresponding laser parameter that changes according to the mode of distinguishing cutting angle among Fig. 2.
Automatically control laser instrument bright dipping fore blow assist gas is closed assist gas behind the light of pass.Read function in advance for control program adds code, before carrying out cutting codes, control program reads cutting codes in advance one time, adds automatically before the bright dipping code and blows afloat code, adds the gas code of entering the GATT after the black out code automatically; Control laser instrument bright dipping fore blow assist gas is closed assist gas behind the light of pass.So just be unlikely to assist gas and blowing always or do not blowing always, also reduce cutting operation person's code and write work.Save the use of assist gas, reduce cutting cost.
Further, imageing sensor is set, the realtime graphic of cut surface is passed to display, by adjust the original position of workbench and monitoring cutting process in real time by the observed image of display at the vertical direction of the cut surface of workbench.On the screen of display, show the point of location ruddiness on stainless sheet steel, corresponding adjustment workbench position, accurately location cutting starting point.Positioning accuracy is improved, and the use that can save the thin plate raw material.Compared to the method for existing cutting stainless steel sheet with fiber laser, the imageing sensor of increase can easier accurate location and real-time monitoring cutting process.
Fig. 3 is the structural representation of device one preferred embodiment of cutting stainless steel sheet with fiber laser of the present invention, the device of this cutting stainless steel sheet with fiber laser comprises: workbench 1, laser instrument 2, optical fiber 3, collimater 4, imageing sensor 5, display 6 and control module 7, this collimater 4 is positioned on the vertical direction of cut surface of workbench 1, this collimater 4 is provided with opening and introduces for optical fiber 3 and assist gas, laser instrument 2 laser that sends imports collimater 4 and vertically shines cut surface by collimater 4 via optical fiber 3, this imageing sensor 5 is positioned on the vertical direction of cut surface so that the realtime graphic of cut surface is reached display 6, and this control module 7 communicates to connect with the mechanical movement of real-time control workbench 1 and the output parameter of laser instrument 2 with workbench 1 and laser instrument 2.The method of cutting stainless steel sheet with fiber laser provided by the present invention can be applicable to the device of the cutting stainless steel sheet with fiber laser of this preferred embodiment.
In this preferred embodiment, imageing sensor 5 is the CCD imaging device; Imageing sensor 5 is positioned at directly over the collimater 4, aims at the direction of illumination of laser; Workbench 1 is an X-Y mechanical movement platform.Workbench 1 is realized change speed in the cutting process by control module 7 controls; Control module 7 can be controlled laser instrument 2 output parameters and change in cutting process; Control module 7 automatic interpolation before cutting blown the NC code of holding one's breath; Imageing sensor 5 can easier accurate location and real-time monitoring cutting process.The device of cutting stainless steel sheet with fiber laser of the present invention has the positioning accuracy height, cutting accuracy height, characteristics such as maintenance cost is low, and the whole set equipment volume is little.
In sum, the method for cutting stainless steel sheet with fiber laser of the present invention and device can be applicable to the optical-fiber laser cutting process of all kinds of stainless sheet steels, make cutting obtain good quality; Be not prone to and do not cut through phenomenon; Make the stainless sheet steel heat radiation evenly, be not prone to excessive ablation phenomen; Save the use of protective gas, reduce cutting cost; Improve positioning accuracy and can monitor cutting process in real time.
The above; for the person of ordinary skill of the art; can make other various corresponding changes and distortion according to technical scheme of the present invention and technical conceive, and all these changes and distortion all should belong to the protection domain of accompanying Claim of the present invention.
Claims (9)
1. the method for a cutting stainless steel sheet with fiber laser is characterized in that, comprising:
Step 1. reduces cutting speed in the starting stage of cutting compared to predetermined cutting speed;
Cut corner size, the cutting parameter of corresponding adjustment laser by real-time judge in the step 2. cutting process;
Step 3. control laser instrument blows assist gas automatically before bright dipping, close assist gas automatically behind the light of pass.
2. the method for cutting stainless steel sheet with fiber laser according to claim 1 is characterized in that, in the step 2, compared to the laser pulse frequency that is used for cutting straight line of initial setting up, reduces laser pulse frequency when the little corner of cutting.
3. the method for cutting stainless steel sheet with fiber laser according to claim 2 is characterized in that, if corner is reduced to 85% of the value of setting less than 90 degree and greater than 30 degree with laser pulse frequency; If corner greater than 0 degree, is reduced to 70% of be provided with value with laser pulse frequency smaller or equal to 30 degree.
4. the method for cutting stainless steel sheet with fiber laser according to claim 1, it is characterized in that, in the step 2, compared to the laser pulse frequency that is used for cutting straight line of initial setting up, keeping the pulse frequency of laser when the big corner of cutting is the initial value of setting.
5. the method for cutting stainless steel sheet with fiber laser according to claim 4 is characterized in that, if corner is spent more than or equal to 90 and less than 360 degree, keeping the pulse frequency of laser is the initial value of setting.
6. according to the method for the arbitrary described cutting stainless steel sheet with fiber laser of claim 1-5, it is characterized in that, also comprise, vertical direction at the cut surface of workbench is provided with imageing sensor, the realtime graphic of cut surface is passed to display, by adjusting the original position of workbench by the observed image of display and monitoring cutting process in real time.
7. the device of a cutting stainless steel sheet with fiber laser, it is characterized in that, comprise: workbench, laser instrument, optical fiber, collimater, imageing sensor, display and control module, this collimater is positioned on the vertical direction of cut surface of workbench, this collimater is provided with opening and introduces for optical fiber and assist gas, laser that laser instrument sends imports collimater and vertically shines cut surface by collimater via optical fiber, this imageing sensor is positioned on the vertical direction of cut surface and reaches display with the realtime graphic cut surface, and this control module and workbench and laser instrument communicate to connect with the mechanical movement of real-time control workbench and laser output parameters.
8. the device of cutting stainless steel sheet with fiber laser according to claim 7 is characterized in that, described imageing sensor is the CCD imaging device.
9. the device of cutting stainless steel sheet with fiber laser according to claim 7 is characterized in that, described imageing sensor is positioned at directly over this collimater, aims at the direction of illumination of laser.
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| CN201010258021.5A CN101920399B (en) | 2010-08-19 | 2010-08-19 | Method and device for cutting stainless steel sheet with fiber laser |
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| CN201010258021.5A CN101920399B (en) | 2010-08-19 | 2010-08-19 | Method and device for cutting stainless steel sheet with fiber laser |
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| CN102310271A (en) * | 2011-06-22 | 2012-01-11 | 胡忠 | Electric-control magnetic-partition laser melting metal cutting machine |
| CN102513702A (en) * | 2012-01-05 | 2012-06-27 | 哈尔滨工业大学 | Vacuum laser welding equipment and method |
| CN102756214A (en) * | 2011-04-29 | 2012-10-31 | 深圳市大族激光科技股份有限公司 | Laser perforation method |
| CN103331523A (en) * | 2013-07-10 | 2013-10-02 | 中国科学院半导体研究所 | Method for preparing silica gel pad used for clamping optical fiber by means of solid laser system |
| CN103817442A (en) * | 2013-12-05 | 2014-05-28 | 深圳市大族激光科技股份有限公司 | Method and system for laser cutting of corner |
| CN103894740A (en) * | 2012-12-31 | 2014-07-02 | 徐州润物科技发展有限公司 | Robot used for automotive trim production |
| CN104625429A (en) * | 2014-12-22 | 2015-05-20 | 中国矿业大学 | Laser cutting technology for thick metal plate |
| CN104816101A (en) * | 2015-05-06 | 2015-08-05 | 江苏联恒物宇科技有限公司 | Optical fiber laser cutting process based on stainless steel substrate chips |
| CN104942431A (en) * | 2015-06-17 | 2015-09-30 | 王金 | Laser processing device and process for laser hot melt adhesive quick adhesion thereof |
| CN109822228A (en) * | 2019-01-25 | 2019-05-31 | 湖南大科激光有限公司 | A kind of Intelligent optical fiber laser cutting system and its application method |
| CN111761232A (en) * | 2020-06-09 | 2020-10-13 | 国宏激光科技(江苏)有限公司 | Method for cutting metal plate by optical fiber laser |
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| CN102756214A (en) * | 2011-04-29 | 2012-10-31 | 深圳市大族激光科技股份有限公司 | Laser perforation method |
| CN102756214B (en) * | 2011-04-29 | 2015-07-01 | 大族激光科技产业集团股份有限公司 | Laser perforation method |
| CN102310271A (en) * | 2011-06-22 | 2012-01-11 | 胡忠 | Electric-control magnetic-partition laser melting metal cutting machine |
| CN102513702A (en) * | 2012-01-05 | 2012-06-27 | 哈尔滨工业大学 | Vacuum laser welding equipment and method |
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| CN103817442A (en) * | 2013-12-05 | 2014-05-28 | 深圳市大族激光科技股份有限公司 | Method and system for laser cutting of corner |
| CN104625429A (en) * | 2014-12-22 | 2015-05-20 | 中国矿业大学 | Laser cutting technology for thick metal plate |
| CN104816101A (en) * | 2015-05-06 | 2015-08-05 | 江苏联恒物宇科技有限公司 | Optical fiber laser cutting process based on stainless steel substrate chips |
| CN104942431A (en) * | 2015-06-17 | 2015-09-30 | 王金 | Laser processing device and process for laser hot melt adhesive quick adhesion thereof |
| CN109822228A (en) * | 2019-01-25 | 2019-05-31 | 湖南大科激光有限公司 | A kind of Intelligent optical fiber laser cutting system and its application method |
| CN111761232A (en) * | 2020-06-09 | 2020-10-13 | 国宏激光科技(江苏)有限公司 | Method for cutting metal plate by optical fiber laser |
| CN112171189A (en) * | 2020-09-17 | 2021-01-05 | 常州苏晶电子材料有限公司 | Precision high-efficiency cutting method for thin molybdenum metal |
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Address after: 523000 Guangdong, Dongguan Songshan Lake high tech Industrial Development Zone Industrial Road, No. 28 Applicant after: Guangdong Han's Yueming Laser Technology Co., Ltd. Address before: 523000 Guangdong province Dongguan City Wanjiang Yan Wu Community Industrial Zone Applicant before: Guangdong Han's Yueming Laser Technology Co., Ltd. |
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Address after: 523000 Guangdong, Dongguan Songshan Lake high tech Industrial Development Zone Industrial Road, No. 28 Patentee after: GD HAN'S YUEMING LASER GROUP CO., LTD. Address before: 523000 Guangdong, Dongguan Songshan Lake high tech Industrial Development Zone Industrial Road, No. 28 Patentee before: Guangdong Han's Yueming Laser Technology Co., Ltd. |