CN105436651A - Device for preventing devices from being burnt due to laser radiating position deviation and method thereof - Google Patents
Device for preventing devices from being burnt due to laser radiating position deviation and method thereof Download PDFInfo
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- CN105436651A CN105436651A CN201510609257.1A CN201510609257A CN105436651A CN 105436651 A CN105436651 A CN 105436651A CN 201510609257 A CN201510609257 A CN 201510609257A CN 105436651 A CN105436651 A CN 105436651A
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- laser
- temperature
- detection time
- solder joint
- weld
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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
- B23K3/00—Tools, devices, or special appurtenances for soldering, e.g. brazing, or unsoldering, not specially adapted for particular methods
- B23K3/08—Auxiliary devices 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
- B23K1/00—Soldering, e.g. brazing, or unsoldering
- B23K1/005—Soldering by means of radiant energy
- B23K1/0056—Soldering by means of radiant energy soldering by means of beams, e.g. lasers, E.B.
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Laser Beam Processing (AREA)
Abstract
The invention discloses a device for preventing devices from being burnt due to laser radiating position deviation and a method thereof. The device comprises an optical welding joint, a laser controller, a laser device, a workpiece and the like. According to the device, thermal radiation emitted by the workpiece is received by the optical welding joint, and the optical welding joint transmits the workpiece thermal radiation to a temperature detector. The temperature detector transmits a temperature signal to the laser controller through a temperature feedback cable. The laser controller controls the power output of the laser device through a laser control cable. Laser lights are emitted from the laser device and transmitted to the optical welding joint through a laser output optical fiber. The laser lights are focused on the workpiece by the optical welding joint through light paths. A series of steps of collection and judgment are further added, and the problem that the devices are on fire and burnt due to the fact that a laser radiation point often deviates from a normal radiation position in the laser brazing process is effectively solved.
Description
Technical field
The invention belongs to laser welding technology field, be specially a kind of devices and methods therefor avoiding laser irradiating position to depart from causing device to burn.
Background technology
Laser is the abbreviation of the stimulated emission light amplification of radiation, it is a kind of electromagnetic wave, be that its primary condition produced produced by artificial amplification comprises pumping source laser medium resonant cavity etc., laser has high monochromaticjty directionality coherence and brightness, and laser is a kind of novel heat source.
Welding is by heating or pressurizeing, or both and use, makes the same sex or different in nature two workpiece produce the processing and connecting mode that combine between atoms.
Soldering is a kind of common technology for connecting two urged against surface.Comprise the junction be placed in by the filler of such as metal or alloy material between two surfaces, and heating is to make filler melt.Then filler to flow at least in part in joint and solidifies, and forms soldered fitting, thus is combined securely on two surfaces.Filler and surfacing dissolve each other in interface upper part usually, cause the brute force of molecular level to combine.
Laser braze welding is one of importance of laser processing technology application, and range of application is more and more extensive.
But, in laser braze welding process, often there is the situation that illuminated laser spot departs from normal illumination position.When the position of departing from is non-solder region, often cause irradiation position to damage, can burn because device is on fire time serious.The apparatus and method of problems are not also solved in prior art.
Summary of the invention
The object of the invention is to depart from and the problem burning out device to solve laser irradiating position, a kind of devices and methods therefor avoiding laser irradiating position to depart from causing device to burn is provided.
The device that the present invention avoids laser irradiating position to depart from and causes device to burn comprises optics plumb joint 2, laser controller 3, laser instrument 4 and workpiece 9, the side of described optics plumb joint 2 is provided with the hygrosensor 1 for continuous acquisition temperature at weld, be connected by temperature feedback cable 7 between described hygrosensor 1 and laser controller 3, be connected by laser controlling cable 5 between described laser controller 3 and laser instrument 4, the laser output of described laser instrument 4 is connected with the laser input of optics plumb joint 2 by Laser output optical fiber 6, the pad of described optics plumb joint 2 is connected with workpiece 9 by light path 8.
The method that the present invention avoids laser irradiating position to depart from and causes device to burn comprises the following steps:
001, preset the demarcation temperature of solder joint, the upper limit of detection time and detection time lower limit;
002, start laser weld, detect welding temperature and record weld interval;
003, whether normally weld according to the welding temperature and judging weld interval detecting solder joint: when the welding temperature of solder joint reach the demarcation temperature of solder joint and weld interval between the upper limit and detection time lower limit of detection time time, welding is normal; When but the demarcation temperature that the welding temperature of solder joint reaches solder joint does not reach between lower limit detection time weld interval, represent and heat up too fast, weld abnormal, welding should be stopped; But the demarcation temperature being less than solder joint when the welding temperature of solder joint to have exceeded detection time weld interval upper in limited time, represent and heated up slow, weld abnormal, should stop welding.
The heat radiation that the present invention is sent by part is received by optics plumb joint through light path, optics plumb joint by workpiece thermal radiation transmission to hygrosensor, temperature signal is passed through temperature feedback cable transmission to laser controller by hygrosensor, laser controller controls the power stage of laser instrument by laser controlling cable, laser sends from laser instrument, optics plumb joint is sent to along Laser output optical fiber, laser focuses on workpiece through light path by optics plumb joint, add the step of a series of collection and judgement, effectively solve in laser braze welding process, frequent generation illuminated laser spot departs from normal illumination position and causes device on fire and the problem of burning.
Accompanying drawing explanation
Fig. 1 is the device schematic diagram that the present invention avoids laser irradiating position to depart from causing device to burn;
Fig. 2 be the present invention avoid laser irradiating position to depart from causing device to burn method flow diagram (in Fig. 2, each symbol implication is as follows:
The temperature that T hygrosensor detects
The timing of t timer
The demarcation temperature that T1 presets
T1_FLAG temperature reaches the mark of T1
! T1_FLAG temperature does not reach the mark of T1
Lower limit detection time of t_min setting
Upper limit detection time of t_max setting
T_min_FLAG arrives the mark of t_min weld interval
! T_min_FLAG does not arrive the mark of t_min weld interval
T_max_FLAG arrives the mark of t_max weld interval
! T_max_FLAG does not arrive the mark of t_max weld interval
If condition judgment
& condition and logical relation).
Detailed description of the invention
The present invention is further illustrated below in conjunction with drawings and Examples.
Illustrate that implementation process equipment of the present invention is formed for coaxial-type constant temperature welding equipment: the device that the present invention avoids laser irradiating position to depart from and causes device to burn comprises optics plumb joint 2, laser controller 3, laser instrument 4 and workpiece 9, the side of described optics plumb joint 2 is provided with the hygrosensor 1 for continuous acquisition temperature at weld, be connected by temperature feedback cable 7 between described hygrosensor 1 and laser controller 3, be connected by laser controlling cable 5 between described laser controller 3 and laser instrument 4, the laser output of described laser instrument 4 is connected with the laser input of optics plumb joint 2 by Laser output optical fiber 6, the pad of described optics plumb joint 2 is connected with workpiece 9 by light path 8.
Signal flow: the heat radiation that workpiece 9 sends is received by optics plumb joint 2 through light path 8, optics plumb joint 2 by workpiece 9 thermal radiation transmission to hygrosensor 1, temperature signal is transferred to laser controller 3 by temperature feedback cable 7 by hygrosensor 1, laser controller 3 controls the power stage of laser instrument 4 by laser controlling cable 5, laser sends from laser instrument 4, be sent to optics plumb joint 2 along Laser output optical fiber 6, laser focuses on workpiece 9 through light path 8 by optics plumb joint 2.
The method that the present invention avoids laser irradiating position to depart from and causes device to burn mainly adopts following principle: judge parameter the welding temperature of solder joint and required weld interval to be two, then preset the demarcation temperature of solder joint, the upper limit of detection time and detection time lower limit; Only have a kind of situation when welding normal, namely when the welding temperature of solder joint reaches the demarcation temperature of solder joint and weld interval between the upper limit and detection time lower limit of detection time time, welding is normal; There are two kinds of situations when welding abnormal, namely heat up too fast and heated up slow, but when the demarcation temperature that the welding temperature of solder joint reaches solder joint does not reach between lower limit detection time weld interval, represent and heat up too fast, weld abnormal, should stop welding; But the demarcation temperature being less than solder joint when the welding temperature of solder joint to have exceeded detection time weld interval upper in limited time, represent and heated up slow, weld abnormal, should stop welding.
The method that the present invention avoids laser irradiating position to depart from and causes device to burn specifically comprises the following steps:
The first step: the judgement parameter that needs are set: default demarcation temperature T1, lower limit t_min detection time of setting, upper limit t_max detection time of setting;
Second step: use laser controller 3 to control laser instrument 4 and start to export low power laser irradiates workpiece 9 solder joint to optics plumb joint 2, simultaneously the temperature T of serviceability temperature detector 1 continuous acquisition solder joint, timing t timing from 0;
3rd step: if the temperature T gathering solder joint arrives the demarcation temperature T1 preset, then set temperature reaches the mark T1_FLAG of T1;
4th step: if timing t arrives lower limit t_min detection time of setting, then the mark t_min_FLAG arriving t_min weld interval is set;
5th step: if timing t arrives upper limit t_max detection time of setting, then the mark t_max_FLAG arriving t_max weld interval is set;
6th step: if simultaneously satisfied temperature reaches default demarcation temperature T1, arrive the lower limit and do not arrive upper limit detection time of setting detection time of setting weld interval, then judge that solder joint normally, jumps to normal weld flow process;
7th step: if simultaneously satisfied temperature reaches default demarcation temperature T1, do not arrive the lower limit and do not arrive upper limit detection time of setting detection time of setting weld interval, then judge to heat up too fast, solder joint is abnormal, stops welding;
8th step: if satisfied temperature does not reach default demarcation temperature T1 and arrives upper limit detection time of setting weld interval simultaneously, then judge to heat up slowly, solder joint is abnormal, stops welding.
This method can solve in laser braze welding process, causes device on fire and the problem of burning because illuminated laser spot departs from normal illumination position.
Claims (5)
1. the device avoiding laser irradiating position to depart from causing device to burn, it is characterized in that comprising optics plumb joint (2), laser controller (3), laser instrument (4) and workpiece (9), the side of described optics plumb joint (2) is provided with the hygrosensor (1) for continuous acquisition temperature at weld, be connected by temperature feedback cable (7) between described hygrosensor (1) and laser controller (3), be connected by laser controlling cable (5) between described laser controller (3) and laser instrument (4), the laser output of described laser instrument (4) is connected with the laser input of optics plumb joint (2) by Laser output optical fiber (6), the pad of described optics plumb joint (2) is connected with workpiece (9) by light path (8).
2. the device avoiding laser irradiating position to depart from causing device to burn according to claim 1, its method avoided laser irradiating position to depart from and cause device to burn comprises the following steps:
001, preset the demarcation temperature of solder joint, the upper limit of detection time and detection time lower limit;
002, start laser weld, detect the welding temperature of solder joint and record weld interval;
003, whether normally weld according to the welding temperature and judging weld interval detecting solder joint: when the welding temperature of solder joint reach the demarcation temperature of solder joint and weld interval between the upper limit and detection time lower limit of detection time time, welding is normal; When but the demarcation temperature that the welding temperature of solder joint reaches solder joint does not reach between lower limit detection time weld interval, represent and heat up too fast, weld abnormal, welding should be stopped; But the demarcation temperature being less than solder joint when the welding temperature of solder joint to have exceeded detection time weld interval upper in limited time, represent and heated up slow, weld abnormal, should stop welding.
3. the method avoiding laser irradiating position to depart from causing device to burn according to claim 2, step 001 comprises the following steps:
The judgement parameter of needs is set: the demarcation temperature T1 presetting solder joint, lower limit t_min detection time of setting, upper limit t_max detection time of setting.
4. the method avoiding laser irradiating position to depart from causing device to burn according to claim 2, step 002 comprises the following steps:
The first step: use laser controller (3) to control laser instrument (4) and start to export low power laser irradiates workpiece (9) solder joint to optics plumb joint (2), the temperature T of serviceability temperature detector (1) continuous acquisition solder joint simultaneously, timing t timing from 0;
Second step: if the temperature T gathering solder joint arrives the demarcation temperature T1 preset, then set temperature reaches the mark T1_FLAG of T1;
3rd step: if timing t arrives lower limit t_min detection time of setting, then the mark t_min_FLAG arriving t_min weld interval is set;
4th step: if timing t arrives upper limit t_max detection time of setting, then the mark t_max_FLAG arriving t_max weld interval is set.
5. the method avoiding laser irradiating position to depart from causing device to burn according to claim 2, step 003 comprises the following steps:
If simultaneously satisfied temperature reaches default demarcation temperature T1, arrive the lower limit and do not arrive upper limit detection time of setting detection time of setting weld interval, then judge that solder joint normally, jumps to normal weld flow process;
If simultaneously satisfied temperature reaches default demarcation temperature T1, do not arrive the lower limit and do not arrive upper limit detection time of setting detection time of setting weld interval, then judge to heat up too fast, solder joint is abnormal, stops welding;
If satisfied temperature does not reach default demarcation temperature T1 and arrives upper limit detection time of setting weld interval simultaneously, then judge to heat up slowly, solder joint is abnormal, stops welding.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510609257.1A CN105436651A (en) | 2015-09-22 | 2015-09-22 | Device for preventing devices from being burnt due to laser radiating position deviation and method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510609257.1A CN105436651A (en) | 2015-09-22 | 2015-09-22 | Device for preventing devices from being burnt due to laser radiating position deviation and method thereof |
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| CN105436651A true CN105436651A (en) | 2016-03-30 |
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| CN201510609257.1A Pending CN105436651A (en) | 2015-09-22 | 2015-09-22 | Device for preventing devices from being burnt due to laser radiating position deviation and method thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113102890A (en) * | 2021-04-30 | 2021-07-13 | 深圳市艾雷激光科技有限公司 | Welding method, terminal device and computer-readable storage medium |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6245469A (en) * | 1985-08-26 | 1987-02-27 | Nippei Toyama Corp | Control method for laser soldering device |
| JPS63290697A (en) * | 1987-05-21 | 1988-11-28 | Nippei Toyama Corp | Control method for quantity of heat of laser heating apparatus |
| US5196672A (en) * | 1991-02-28 | 1993-03-23 | Nissan Motor Co., Ltd. | Laser processing arrangement |
| JPH11138291A (en) * | 1997-11-06 | 1999-05-25 | Honda Motor Co Ltd | Welding quality judging device in welding equipment |
| CN102967374A (en) * | 2012-11-16 | 2013-03-13 | 中国航空工业集团公司北京航空制造工程研究所 | Method for measuring temperature field in laser welding process |
| CN104002044A (en) * | 2014-06-03 | 2014-08-27 | 湖南大学 | Non-penetration laser welding apparatus and non-penetration laser welding method |
-
2015
- 2015-09-22 CN CN201510609257.1A patent/CN105436651A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6245469A (en) * | 1985-08-26 | 1987-02-27 | Nippei Toyama Corp | Control method for laser soldering device |
| JPS63290697A (en) * | 1987-05-21 | 1988-11-28 | Nippei Toyama Corp | Control method for quantity of heat of laser heating apparatus |
| US5196672A (en) * | 1991-02-28 | 1993-03-23 | Nissan Motor Co., Ltd. | Laser processing arrangement |
| JPH11138291A (en) * | 1997-11-06 | 1999-05-25 | Honda Motor Co Ltd | Welding quality judging device in welding equipment |
| CN102967374A (en) * | 2012-11-16 | 2013-03-13 | 中国航空工业集团公司北京航空制造工程研究所 | Method for measuring temperature field in laser welding process |
| CN104002044A (en) * | 2014-06-03 | 2014-08-27 | 湖南大学 | Non-penetration laser welding apparatus and non-penetration laser welding method |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113102890A (en) * | 2021-04-30 | 2021-07-13 | 深圳市艾雷激光科技有限公司 | Welding method, terminal device and computer-readable storage medium |
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Application publication date: 20160330 |
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