CN201052570Y - Real time monitoring device for three-dimensional laser welding and cutting process - Google Patents
Real time monitoring device for three-dimensional laser welding and cutting process Download PDFInfo
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- CN201052570Y CN201052570Y CN 200720085635 CN200720085635U CN201052570Y CN 201052570 Y CN201052570 Y CN 201052570Y CN 200720085635 CN200720085635 CN 200720085635 CN 200720085635 U CN200720085635 U CN 200720085635U CN 201052570 Y CN201052570 Y CN 201052570Y
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Abstract
The utility model relates to a device for monitoring quality and processes of three-dimensional laser welding, cutting, and processing at real-time. The utility model is designed to aim at the shortcoming that the monitoring device in the prior art can only coaxially collect and analyze one radiating light but cannot simultaneously and coaxially collect and analyze fused bath or plasma radiating lights, which causes difficulty in accurately judging the quality and the processes of welding, cutting, and processing. The utility model provides a real-time quality-monitoring device for coaxially collecting infrared wave ranges and plasma radiating light signals in the process of three-dimensional laser processing, and the monitoring device of the utility model can achieve the real-time quality monitoring and provide more precise information for closed-loop controlling in the process of three-dimensional laser processing.
Description
Technical field
The utility model relates to and a kind of three-dimensional laser welding and cutting processing process and quality is carried out real-time device for monitoring.
Background technology
Laser weld and cutting can be used for processing metal and nonmetallic materials, and the heat affected area is little, because of light beam is easy to guiding, can adopt flexible processing method flexibly.Based on above advantage, industrial, especially obtained using widely in fields such as automobile, metallurgy, Aero-Space and national defence.Yet when laser weld and cutting processing technology are widely used, its process and quality are implemented the efficient real time monitoring be still a problem demanding prompt solution, and be the prerequisite of further implementing closed-loop control.In various three-dimensional laser process, with the laser weld is example, because it is more to influence the factor of welding process, all can influence the stability of welding process and final penetration state as plasmoid, focal position, focus error and workpiece deformation etc., only be difficult to guarantee to obtain uniform and stable appearance of weld, defective such as be easy to produce or burn lack of penetration by fixing welding conditions.
Therefore, machining state is carried out on-line real time monitoring and become the key that guarantees the Laser Processing quality.The light radiation that utilizes the generations such as aperture, plasma or molten bath in photoelectricity and the vision sensor monitoring laser processing procedure is one of important method of laser processing procedure monitoring in real time.Because the power of the plasma signal in the monitor signal is decided by the temperature and the volume of plasma; And the fusion penetration that welds (cutting) is decided by the degree of depth of " aperture ", and the material steam in " aperture " is the source of plasma just.Therefore, whether the reflection that has or not of plasma signal has " aperture " to form under the certain condition, and the intensity of signal has then reflected the size of fusion penetration.The intensity of infrared signal is decided by the Temperature Distribution and the surface area in molten bath, and bath temperature distribution and surface area are determining the shape of following weld seam.At the back of work sensor installation is a kind of method that is easier to implementation procedure monitoring, but since in most cases back side sensor be difficult to servo-actuated, this method is used limited in engineering is produced.The method of monitoring in the face of plasma or aperture from the workpiece upper side is also arranged, but because of can't directly observing the light radiation information of aperture inside, and can not be used for the laser processing procedure of two and three dimensions.Therefore from processing positive particularly aperture top plasma, the molten bath state of aperture inside and top being monitored, extract the characteristic signal of reflection machining state, is to realize the three-dimensional laser process important prerequisite of monitoring in real time.And existing coaxial monitoring technology is only from a kind of radiant light of the molten bath coaxial collection analysis in top, and collection analysis molten bath or plasma resonance light simultaneously cause difficulty, narrow application range to accurate judgement welding and cut quality.The utility model is exactly a kind ofly to utilize coaxial checkout gear to gather and analyze the molten bath directly over laser and the material effects zone simultaneously and a kind of method that two kinds of signals of plasma resonance carry out the process monitoring, can overcome the shortcoming of prior art, can be used for the two and three dimensions laser processing procedure, and adaptability is good, reliability is high.
Summary of the invention
The utility model has proposed a kind of coaxial collection infrared band of process such as three-dimensional laser welding and cutting and real-time quality monitoring device of plasma resonance optical signal of can be used at the defective of above-mentioned said prior art.
The real-time monitoring device of a kind of three-dimensional laser welding and cutting process is characterized in that:
The leaded light mirror be positioned at the Reciprocity of Laser ﹠ Materials zone directly over, be used to obtain molten bath infra-red radiation and plasma resonance light;
Spectroscope and leaded light mirror are positioned on the same light path, be used to accept the light of coming from the leaded light mirroring, wherein infra-red radiation light transmission spectroscope exposes to infrared focus lamp, and infrared photoelectric sensor is positioned at the focus place of infrared focus lamp, be used to receive the infra-red radiation optical signal, and be converted into the signal of telecommunication; The plasma optical signal is reflected by spectroscope, exposes to the plasma focus mirror, and the plasma photoelectric sensor is positioned at the focus place of plasma focus mirror, is used to receive the plasma resonance optical signal, and is converted into the signal of telecommunication;
Modulate circuit links to each other with infrared band radiant light electric transducer with the plasma photoelectric sensor respectively, computer and modulate circuit are in succession, the photosignal that modulate circuit reception plasma photoelectric sensor and infrared band radiant light electric transducer send, amplify with filtering after send computer to and carry out Treatment Analysis, obtain the quality information of laser processing procedure.
This device is by the infrared band radiant light of spectroscope transmission, focus in the photoelectric sensor of gathering the infrared band radiant light through infrared focus lamp, the plasma resonance light of reflection focuses in the photoelectric sensor of gathering plasma resonance light through the plasma focus mirror, is input to after the signal that produces in infrared photoelectric sensor and the plasma photoelectric sensor amplifies by modulate circuit and carries out analyzing and processing in the computer.
Utilize coaxial checkout gear of the present utility model, provide a kind of in various three-dimensional laser process, as welding, cutting, punching etc., can realize real-time quality-monitoring and provide more accurate information to reach the automation control of whole process for closed-loop control in the three-dimensional laser process.Its main advantages of the utility model has:
(1) coaxial detection process signal has been realized the monitoring of three-dimensional laser process and quality;
(2) monitor the infrared band radiant light of reflection molten bath state in the laser processing procedure and two kinds of optical signals of plasma resonance light of reflection aperture state simultaneously;
(3) in the process of laser weld and laser cutting, can accurately detect the state that penetrates of aperture inside, be easy to obtain the information of complete penetration;
(4) on the response speed when signal changes to welded condition, reflect the variation of welded condition more delicately, might realize penetration monitoring and control.
Description of drawings
The real-time quality testing embodiment of Laser Processing schematic diagram,
Fig. 1: three-dimensional laser welding and the coaxial monitoring device schematic diagram of cutting process.
Fig. 2: main box assembling schematic diagram.
Fig. 3: side box body assembling schematic diagram.
Fig. 4: connecting plate schematic diagram.
Fig. 5: be used for the infrared photoelectric sensor clamping tube schematic diagram that the infrared band radiant light is gathered.
Fig. 6: the photoelectric sensor clamping tube schematic diagram that is used for the plasma resonance light collection.
The specific embodiment
Explain the specific embodiment of the present utility model below in conjunction with accompanying drawing:
Figure 1 shows that three-dimensional laser welding and the coaxial monitoring device schematic diagram of cutting process, leaded light mirror 1 is fixed on the first eyeglass bearing 13 by the first eyeglass pressure ring 12, and the first eyeglass bearing 13 is fixed in the main box 8.Laser condensing lens 9 is fixed in the mechanical device of nozzle top.Spectroscope 2 is fixed on the second eyeglass bearing 15 by the second eyeglass pressure ring 14, and the second eyeglass bearing 15 is fixed in the side box body 4.Connecting plate 3 connects the main box 8 in left side and the side box body 4 on right side.The infrared photoelectric sensor clamping tube 5 that is used to gather the infrared band radiant light is used to gather the photoelectric sensor clamping tube 6 of plasma resonance light by the flange that is bolted to side box body 4 belows by the flange that is bolted to side box body 4 right sides.The signal that infrared photoelectric sensor 19 and plasma photoelectric sensor 26 produce is transferred to modulate circuit 10 by optical cable, and auxiliary sonic transducer 7 links to each other with modulate circuit 10, and the information of extraction can further increase the reliability of system monitoring.Signal is imported computer 11 again and is carried out Treatment Analysis after modulate circuit 10 amplifies, obtain the quality information of laser processing procedure.
Fig. 2 further describes main box 8 assembly structures, and leaded light mirror 1 is fixed on the first eyeglass bearing 13 by the first eyeglass pressure ring 12, and the first eyeglass pressure ring 12 has the thread helix face, with 13 matches of the first eyeglass bearing; The first eyeglass bearing 13 is a three-legged structure, and leaded light mirror 1 is placed at the middle part, inclined-plane, and there is the hole, garden of a corresponding size at the vertical plane middle part, and respectively there is a symmetrical boss horizontal plane both sides, with main box 8 below grooves on two sides matches.
Fig. 3 represents side box body 4 assembly structures, and the spectroscope 2 usefulness second eyeglass pressure ring 14 is fixed on the second eyeglass bearing 15, and the second eyeglass pressure ring 14 has the thread helix face, with 15 matches of the second eyeglass bearing; The second eyeglass bearing 15 is a three-legged structure, and spectroscope 2 is placed at the middle part, inclined-plane, and there is the aperture of a corresponding size at the vertical plane middle part, and respectively there is a symmetrical boss horizontal plane both sides, with side box body 4 top grooves on two sides matches.Respectively there is a flange side box body 4 right sides and below, and be fluted on the flange, and infrared photoelectric sensor clamping tube 5 and plasma photoelectric sensor clamping tube 6 install in groove respectively by bolt, and can move horizontally along axis 20mm.
Fig. 4 represents connecting plate 3 structures, and right figure is the connecting plate side view, and the below screwed hole is connected with side box body 4 by screw, and the vertical plane screwed hole is connected with main box 8 by screw.
Fig. 5 represents to be used for infrared photoelectric sensor clamping tube 5 structures that the infrared band radiant light is gathered, infrared focus lamp 18 is fixed in the infrared photoelectric sensor master tube 16 by infrared focus lamp gland 17, infrared photoelectric sensor 19 is fixed in the infrared sensor slide cartridge 20, and infrared sensor slide cartridge 20 can be done moving horizontally along axis 50mm in infrared photoelectric sensor master tube 16.The first main tube go up chuck 21, the first main tube down chuck 22 be connected by bolt with infrared photoelectric sensor master tube 16 threes, the infrared photoelectric sensor clamping tube 5 of composition is by being bolted to the right side of side box body 4.
Fig. 6 represents to be used for photoelectric sensor clamping tube 6 structures of plasma resonance light collection, plasma focus mirror 25 is fixed in the photoelectric sensor master tube 23 by focus lamp gland 24, is used for plasma light signal focus that spectroscope 2 the is reflected back photosurface to plasma photoelectric sensor 26; The plasma resonance optical band that plasma photoelectric sensor 26 receives is 300nm～700nm;
Plasma photoelectric sensor 26 is fixed in the photoelectric sensor slide cartridge 27, and photoelectric sensor slide cartridge 27 can be done moving along axis 50mm in photoelectric sensor master tube 23.The second main tube go up chuck 28, the second main tube down chuck 29 be connected by bolt with photoelectric sensor master tube 23 threes, the plasma photoelectric sensor clamping tube 6 of composition is by being bolted to the below of side box body 4.
In order to realize the real-time quality monitoring method of three-dimensional laser process described in the utility model, be with a solid YAG or CO
2Laser instrument and can transmit the light path of laser, and photoelectricity is accepted components and parts, signal preposing signal process circuit and Computer signal acquisition system.
Below in conjunction with the real-time quality monitoring method of instantiation explanation three-dimensional laser process.
The method of real-time of processing of the present utility model and quality is as follows:
Laser beam by behind the leaded light mirror through the laser condensing lens focussing force on workpiece, molten bath radiation that produces in the process and plasma resonance light by laser condensing lens to the leaded light mirror, but the radiant light that this leaded light mirror reflector laser zone of action produces, radiant light is mapped to spectroscope through the leaded light mirror reversal, because spectroscope only allows infrared band light to pass through, this part passes through spectroscope by the infrared band radiant light that the laser action zone produces, focus in the photoelectric sensor of gathering the infrared band radiant light through infrared focus lamp, plasma resonance light by the spectroscope reflection focuses in the photoelectric sensor of gathering plasma resonance light through the plasma focus mirror, and the signal of two photoelectric sensor generations amplifies by modulate circuit respectively and handles through being input to computer after the A/D conversion.This coaxial monitoring system can directly detect aperture internal plasma light radiation information.
Claims (3)
1. the real-time monitoring device of three-dimensional laser welding and cutting process is characterized in that:
Leaded light mirror (1) be positioned at the Reciprocity of Laser ﹠ Materials zone directly over, be used to obtain molten bath infra-red radiation and plasma resonance light;
Spectroscope (2) is positioned on the same light path with leaded light mirror (1), be used for the light that acceptance reflects back from leaded light mirror (1), wherein infra-red radiation light transmission spectroscope (2) exposes to infrared focus lamp (18), infrared photoelectric sensor (19) is positioned at the focus place of infrared focus lamp (18), be used to receive the infra-red radiation optical signal, and be converted into the signal of telecommunication;
The plasma optical signal is exposed to plasma focus mirror (25) by spectroscope (2) reflection, and plasma photoelectric sensor (26) is positioned at the focus place of plasma focus mirror (25), is used to receive the plasma resonance optical signal, and is converted into the signal of telecommunication;
Modulate circuit (10) links to each other with infrared band radiant light electric transducer (19) with plasma photoelectric sensor (26) respectively, computer (11) and modulate circuit (10) are in succession, the photosignal that modulate circuit (10) reception plasma photoelectric sensor (26) and infrared band radiant light electric transducer (19) send, amplify with filtering after send computer (11) to and carry out Treatment Analysis, obtain the quality information of laser processing procedure.
2. monitoring device according to claim 1 is characterized in that:
Leaded light mirror (1) is fixed on the first eyeglass bearing (13) by the first eyeglass pressure ring (12), and the first eyeglass bearing (13) is fixed in the main box (8);
Spectroscope (2) is fixed on the second eyeglass bearing (15) with the second eyeglass pressure ring (14), and the second eyeglass bearing (15) is fastened in the side box body (4), and side box body (4) is connected with main box (8) by connecting plate (3);
Plasma focus mirror (25) is installed in the photoelectric sensor master tube (23), is used for plasma light signal focus that spectroscope (2) the is reflected back photosurface to plasma photoelectric sensor (26); The plasma resonance optical band that plasma photoelectric sensor (26) receives is 300nm～700nm;
Infrared focus lamp (18) is installed in the infrared photoelectric sensor master tube (16); Infrared photoelectric sensor (19) is installed in the infrared sensor slide cartridge (20).
3. according to claim 1 or 2 described monitoring devices, it is characterized in that,
The second eyeglass bearing (15) is a three-legged structure, and spectroscope (2) is placed at the middle part, inclined-plane, and there is the hole, garden of a corresponding size at the vertical plane middle part, and respectively there is a symmetrical boss horizontal plane both sides, with the grooves on two sides match of side box body (4) top; Side box body (4) is connected by bolt with connecting plate (3), and connecting plate (3) is connected with main box (8) by bolt;
Spectroscope (2) is fixed on the second eyeglass bearing (15) by the second eyeglass pressure ring (14), and the second eyeglass pressure ring (14) has the thread helix face, with second eyeglass bearing (15) match;
Infrared focus lamp (18) is fixed in the infrared photoelectric sensor master tube (16) by infrared focus lamp gland (17), infrared photoelectric sensor (19) is fixed in the infrared sensor slide cartridge (20), and infrared sensor slide cartridge (20) can be done moving along axis 50mm in infrared photoelectric sensor master tube (16); The first main tube goes up that chuck (22) is connected by bolt with infrared photoelectric sensor master tube (16) three under the chuck (21) and the first main tube, and the infrared photoelectric sensor clamping tube (5) of composition is by being bolted to the right side of side box body (4);
Plasma focus mirror (25) is fixed in the photoelectric sensor master tube (23) by focus lamp gland (24), plasma photoelectric sensor (26) is fixed in the photoelectric sensor slide cartridge (27), and photoelectric sensor slide cartridge (27) can be done moving along axis 50mm in photoelectric sensor master tube (23); The second main tube go up chuck (28), the second main tube down chuck (29) be connected by bolt with photoelectric sensor master tube (23) three, the plasma photoelectric sensor clamping tube (6) of composition is by being bolted to the below of side box body (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200720085635 CN201052570Y (en) | 2007-06-29 | 2007-06-29 | Real time monitoring device for three-dimensional laser welding and cutting process |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200720085635 CN201052570Y (en) | 2007-06-29 | 2007-06-29 | Real time monitoring device for three-dimensional laser welding and cutting process |
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| Publication Number | Publication Date |
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| CN201052570Y true CN201052570Y (en) | 2008-04-30 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 200720085635 Expired - Lifetime CN201052570Y (en) | 2007-06-29 | 2007-06-29 | Real time monitoring device for three-dimensional laser welding and cutting process |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101376194B (en) * | 2008-08-19 | 2011-02-16 | 东莞华中科技大学制造工程研究院 | On-line measurement compensating mechanism for laser beam welding |
| CN102463419A (en) * | 2010-11-18 | 2012-05-23 | 现代自动车株式会社 | Method and apparatus for the quality inspection of laser welding |
| US8461475B2 (en) | 2008-10-25 | 2013-06-11 | Kjellberg Finsterwalde Plasma Und Maschinen Gmbh | System for the thermal processing of workpieces by a plasma jet or a laser beam |
| CN105142848A (en) * | 2013-04-15 | 2015-12-09 | 丰田自动车株式会社 | Welding portion inspection device and inspection method therefore, with extracting portion for extracting evaporation luminescence and thermal radiation |
| CN107824989A (en) * | 2017-10-26 | 2018-03-23 | 大族激光科技产业集团股份有限公司 | The detection method and system of a kind of laser beam perforation |
| CN108490885A (en) * | 2018-04-26 | 2018-09-04 | 广东水利电力职业技术学院（广东省水利电力技工学校） | A kind of laser PCB engraving systems |
| CN108544090A (en) * | 2018-04-19 | 2018-09-18 | 广州德擎光学科技有限公司 | A kind of laser processing state recognition methods under spectrum ionic state |
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2007
- 2007-06-29 CN CN 200720085635 patent/CN201052570Y/en not_active Expired - Lifetime
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101376194B (en) * | 2008-08-19 | 2011-02-16 | 东莞华中科技大学制造工程研究院 | On-line measurement compensating mechanism for laser beam welding |
| US8461475B2 (en) | 2008-10-25 | 2013-06-11 | Kjellberg Finsterwalde Plasma Und Maschinen Gmbh | System for the thermal processing of workpieces by a plasma jet or a laser beam |
| CN102202829B (en) * | 2008-10-25 | 2013-08-14 | 谢尔贝格芬斯特瓦尔德等离机械有限公司 | System for thermally processing workpieces including plasma and/or laser processing headers connected by sigle shaft element |
| CN102463419A (en) * | 2010-11-18 | 2012-05-23 | 现代自动车株式会社 | Method and apparatus for the quality inspection of laser welding |
| CN102463419B (en) * | 2010-11-18 | 2016-06-01 | 现代自动车株式会社 | The detection method for quality of laser weld and equipment |
| CN105142848A (en) * | 2013-04-15 | 2015-12-09 | 丰田自动车株式会社 | Welding portion inspection device and inspection method therefore, with extracting portion for extracting evaporation luminescence and thermal radiation |
| CN107824989A (en) * | 2017-10-26 | 2018-03-23 | 大族激光科技产业集团股份有限公司 | The detection method and system of a kind of laser beam perforation |
| CN107824989B (en) * | 2017-10-26 | 2019-11-12 | 大族激光科技产业集团股份有限公司 | A kind of detection method and system of laser beam perforation |
| CN108544090A (en) * | 2018-04-19 | 2018-09-18 | 广州德擎光学科技有限公司 | A kind of laser processing state recognition methods under spectrum ionic state |
| CN108544090B (en) * | 2018-04-19 | 2020-06-16 | 广州德擎光学科技有限公司 | Laser processing state identification method under spectral ion state |
| CN108490885A (en) * | 2018-04-26 | 2018-09-04 | 广东水利电力职业技术学院（广东省水利电力技工学校） | A kind of laser PCB engraving systems |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Effective date of abandoning: 20070629 |
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| C25 | Abandonment of patent right or utility model to avoid double patenting |