CN109926718B - Temperature-control laser welding system and method - Google Patents
Temperature-control laser welding system and method Download PDFInfo
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- CN109926718B CN109926718B CN201910364923.8A CN201910364923A CN109926718B CN 109926718 B CN109926718 B CN 109926718B CN 201910364923 A CN201910364923 A CN 201910364923A CN 109926718 B CN109926718 B CN 109926718B
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- 238000003466 welding Methods 0.000 title claims abstract description 105
- 238000000034 method Methods 0.000 title claims abstract description 13
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Abstract
The invention provides a temperature control laser welding system which can not only improve the welding efficiency, but also control the size of welding light spots and ensure the product quality, and in addition, the invention also provides a temperature control laser welding method; the laser welding device comprises a pyrometer and a laser generator electrically connected with the pyrometer, wherein a beam combining lens obliquely arranged in the outgoing direction of a laser beam is arranged below the laser generator, a reflecting mirror parallel to the beam combining lens is arranged below the pyrometer, the beam combining lens is positioned on the incident light path of the reflecting mirror, a vibrating mirror is arranged on the reflecting light path of the beam combining lens, the lower part of the vibrating mirror is connected with a field lens, and the focusing point of the field lens is a welding position.
Description
Technical Field
The invention relates to the technical field of welding, in particular to a temperature control laser welding system and a temperature control laser welding method.
Background
The photovoltaic solder strip is an important raw material in the welding process of the photovoltaic module, is mainly used for connecting solar cells and plays a role in electricity collection and conduction. However, the welding between the conventional welding strip and the battery piece is mostly performed manually, so that the welding efficiency is low, the size of a welding spot cannot be controlled, the welding process quality is likely to be affected if the spot is large, the welding spot is likely to be burnt if the spot is small, and the product quality is likely to be affected.
Disclosure of Invention
In order to solve the problems, the invention provides a temperature control laser welding system which can improve welding efficiency, control the size of welding light spots and ensure product quality.
The technical scheme is as follows: a temperature controlled laser welding system, characterized by: the laser welding device comprises a pyrometer and a laser generator electrically connected with the pyrometer, wherein a beam combining lens obliquely arranged in the outgoing direction of a laser beam is arranged below the laser generator, a reflecting mirror parallel to the beam combining lens is arranged below the pyrometer, the beam combining lens is positioned on the incident light path of the reflecting mirror, a vibrating mirror is arranged on the reflecting light path of the beam combining lens, the lower part of the vibrating mirror is connected with a field lens, and the focusing point of the field lens is a welding position.
It is further characterized by:
The interface ends of the pyrometer and the laser generator are respectively and correspondingly connected with a reflector seat and a beam combining lens seat, optical path cavities are respectively arranged in the reflector seat and the beam combining lens seat, lens frames are respectively arranged in the optical path cavities, the reflector and the beam combining lens are respectively arranged in the corresponding optical path cavities through the lens frames, the interfaces of the pyrometer and the laser generator are respectively communicated with the corresponding optical path cavities, and the reflector seat, the beam combining lens seat and the vibrating lens are respectively communicated through connecting pieces which are hollow;
The reflecting mirror and the beam combining mirror are obliquely arranged in the corresponding light path cavity, and the beam combining mirror and the laser beam outgoing direction of the laser generator are arranged at 45 degrees;
the reflection wavelength of the reflecting mirror is 1700 nm-2000 nm; the reflection wavelength of the beam combining lens is 1064nm, and the transmission wavelength is 1700 nm-2000 nm; the connecting piece is hollow and tubular;
A temperature control laser welding method is characterized in that: which comprises the following steps:
S1, tightly attaching a welding strip at a joint of two battery pieces, wherein a field lens is arranged above the welding strip, and a focusing point of the field lens is aligned to the welding strip to be welded;
S2, a laser generator emits a laser beam, the laser beam enters a beam combining lens after passing through a light path cavity of the beam combining lens seat, the laser beam is reflected by the beam combining lens to enter a vibrating lens and is reflected to a field lens through the vibrating lens, the field lens focuses the laser beam to a proper size, and then the laser beam is focused to act on the welding strip to form a welding spot for laser welding;
S3, infrared heat radiation reflected at the welding point on the welding strip sequentially passes through the field lens, the vibrating mirror and the beam combining mirror and then is incident on the reflecting mirror, and then is reflected to the pyrometer through the reflecting mirror to carry out temperature detection, and the pyrometer controls the output power of the laser generator according to the actually measured temperature, so that accurate laser welding is realized.
It is further characterized by:
In the step S2, drawing welding spots in marking software, drawing a movement track of a focusing point into a spiral line with the diameter of 1-1.5 mm, wherein the diameter of the focusing point is 0.25-1 mm, the pitch of the spiral line is 0.1-0.2 mm, the welding speed is 50-100 mm/S, and the welding times are set to be 1 time;
In the step S3, the welding temperature in the pyrometer is 350-450 ℃, the pyrometer controls the laser output power in real time according to the measured temperature so as to control the temperature of the welding point, and the control frequency is 10KHZ;
the welding strip is a flat welding strip.
The invention has the advantages that the laser beam emitted by the laser generator is reflected by the beam combining mirror to enter the vibrating mirror and then reflected to the field lens, the laser beam is focused to a proper size by the field lens and then focused to act on a welding strip to be welded, the infrared heat radiation reflected at the welding point on the welding strip is returned to the reflecting mirror along the light path and then reflected to the pyrometer for temperature detection by the reflecting mirror, and the pyrometer can control the output power of the laser generator according to the actually measured temperature, thereby realizing accurate laser welding, not only improving the welding efficiency, but also controlling the size of a welding spot and the temperature of the welding point and ensuring the product quality.
Drawings
FIG. 1 is a schematic diagram of the front view of the present invention;
FIG. 2 is a schematic top view of the present invention;
FIG. 3 is a schematic view of the A-A structure of FIG. 2;
FIG. 4 is a schematic perspective view of the present invention;
fig. 5 is a schematic view of laser welding of the present invention.
Detailed Description
As shown in fig. 1 to 4, the invention comprises a pyrometer 1 and a laser generator 2 electrically connected with the pyrometer, a beam combining mirror 3 obliquely arranged in the outgoing direction of the laser beam is arranged below the laser generator 2, a reflecting mirror 4 arranged parallel to the beam combining mirror 3 is arranged below the pyrometer 1, the beam combining mirror 3 is positioned on the incident light path of the reflecting mirror 4, a vibrating mirror 5 is arranged on the reflecting light path of the beam combining mirror 3, a field lens 6 is connected to the lower part of the vibrating mirror 5, and the focusing point of the field lens 6 is a welding position.
The interfaces of the pyrometer 1 and the laser generator 2 are respectively and correspondingly connected with a reflecting mirror seat 7 and a beam combining mirror seat 8, optical path cavities 9 are respectively arranged in the reflecting mirror seat 7 and the beam combining mirror seat 8, a mirror bracket 10 is respectively arranged in the optical path cavities 9, the reflecting mirror 4 and the beam combining mirror 3 are respectively arranged in the corresponding optical path cavities 9 through the mirror bracket 10, the interfaces of the pyrometer 1 and the laser generator 2 are respectively communicated with the corresponding optical path cavities 9, and the reflecting mirror seat 7, the beam combining mirror seat 8 and the vibrating mirror 5 are respectively communicated through a connecting piece 11, and the connecting piece 11 is in a hollow tube shape;
The reflecting mirror 4 and the beam combining mirror 3 are obliquely arranged in the corresponding light path cavity 9, and the beam combining mirror 3 and the laser beam emitting direction of the laser generator 2 are arranged at 45 degrees;
The reflection wavelength of the reflector 4 is 1700 nm-2000 nm; the reflection wavelength of the beam combining lens 3 is 1064nm, and the transmission wavelength is 1700 nm-2000 nm.
A temperature controlled laser welding method comprising the steps of:
S1, tightly attaching a welding strip 14 at a joint of two battery pieces 13, wherein the welding strip 14 is a flat welding strip, a field lens 6 is arranged above the welding strip 14, and a focusing point of the field lens 6 is aligned to the welding strip 14 to be welded;
S2, drawing a welding spot 15 in marking software MARKINGMATE, drawing a movement track of a focusing point into a spiral line with the diameter of 1mm, wherein the diameter of the focusing point is 0.25mm, the pitch of the spiral line is 0.1mm, the welding speed is 50mm/S, and the welding times are set to be 1 time as shown in FIG. 5; the vibrating mirror 5 can accurately position the welding point according to positioning data provided by the camera, and control and finish marking the graph, the beat requirement is 8 welding points 1s, wherein the camera is connected with the industrial personal computer through a cable, after the camera shoots, the camera can send image data to the industrial personal computer, and after the industrial personal computer processes through corresponding software, the welding point position information is transmitted to the vibrating mirror 5, which is used as a prior art principle, so that the industrial personal computer and the camera are not shown in the embodiment;
The laser generator 2 emits laser beams, the laser beams are incident on the beam combining lens 3 after passing through the light path cavity 9 of the beam combining lens seat 8, the laser beams are reflected by the beam combining lens 3 to enter the vibrating lens 5 and are reflected to the field lens 6 by the vibrating lens 5, the field lens 6 focuses the laser beams to a proper size, and the focusing light spots can be regulated by regulating the laser generator 2 and the knob 12 on the pyrometer 1 and then focused on the welding belt to form welding spot light spots, and the light spots scan along the spiral track so as to perform laser welding;
s3, infrared heat radiation reflected at a welding point on the welding strip 14 sequentially passes through the field lens 6, the vibrating mirror 5 and the beam combining mirror 3 through a light path and then is incident on the reflecting mirror 4, then is reflected to the pyrometer 1 through the reflecting mirror 4 to be subjected to temperature detection, the welding temperature in the pyrometer 1 is set to 350 ℃, the pyrometer 1 controls the output power of the laser generator 2 in real time according to the actually measured temperature, the temperature of the welding point is further controlled, and the control frequency is 10KHZ, so that accurate laser welding is realized.
Claims (7)
1. A temperature controlled laser welding system, characterized by: the laser welding device comprises a pyrometer and a laser generator electrically connected with the pyrometer, wherein a beam combining lens obliquely arranged in the outgoing direction of a laser beam is arranged below the laser generator, a reflecting mirror parallel to the beam combining lens is arranged below the pyrometer, the beam combining lens is positioned on the incident light path of the reflecting mirror, a vibrating mirror is arranged on the reflecting light path of the beam combining lens, the lower part of the vibrating mirror is connected with a field lens, and the focusing point of the field lens is a welding position;
Drawing welding spots in marking software MARKINGMATE, drawing a movement track of a focusing point into a spiral line with the diameter of 1mm, wherein the diameter of the focusing point is 0.25mm, the pitch of the spiral line is 0.1mm, the welding speed is 50mm/s, and the welding times are set to be 1 time; the vibrating mirror can be accurately positioned to the welding point according to positioning data provided by the camera, a marking graph is controlled to be finished, the beat requirement is 8 welding points for 1s, the camera is connected with the industrial personal computer through a cable, after the camera shoots, image data are sent to the industrial personal computer through the camera, and after the industrial personal computer processes through corresponding software, the welding point position information is transmitted to the vibrating mirror; the laser generator emits laser beams, the laser beams enter the beam combining lens after passing through the light path cavity of the beam combining lens seat, the laser beams enter the vibrating lens after being reflected by the beam combining lens and are reflected to the field lens by the vibrating lens, the field lens focuses the laser beams to a proper size, and then the laser beams are focused to act on the welding strip to form welding spot for laser welding; the infrared heat radiation reflected at the welding point on the welding strip sequentially passes through the field lens, the vibrating mirror and the beam combining mirror and then is incident on the reflecting mirror, and then is reflected to the pyrometer through the reflecting mirror to carry out temperature detection, and the pyrometer controls the output power of the laser generator according to the actually measured temperature; the size of the welding spot can be adjusted through a knob on the laser generator and the pyrometer.
2. A temperature controlled laser welding system according to claim 1, wherein: the optical path cavity is formed by connecting a mirror base, a beam combining mirror base, a mirror frame, a mirror and a beam combining mirror, wherein the mirror base and the beam combining mirror base are respectively and correspondingly connected with interface ends of the pyrometer and the laser generator, the mirror base and the beam combining mirror base are internally provided with optical path cavities, the mirror frame is internally provided with the mirror frame, the mirror and the beam combining mirror are respectively arranged in the corresponding optical path cavities through the mirror frame, interfaces of the pyrometer and the laser generator are respectively communicated with the corresponding optical path cavities, and the mirror base, the beam combining mirror base and the beam vibrating mirror are respectively communicated through connecting pieces.
3. A temperature controlled laser welding system according to claim 2, wherein: the reflecting mirror and the beam combining mirror are obliquely arranged in the corresponding light path cavity, and the beam combining mirror and the laser beam outgoing direction of the laser generator are arranged at 45 degrees.
4. A temperature controlled laser welding system according to claim 2, wherein: the reflection wavelength of the reflecting mirror is 1700 nm-2000 nm; the reflection wavelength of the beam combining lens is 1064nm, and the transmission wavelength is 1700 nm-2000 nm; the connecting piece is hollow tubular.
5. A temperature controlled laser welding method of a temperature controlled laser welding system according to any one of claims 1-4, characterized by: which comprises the following steps:
S1, tightly attaching a welding strip at a joint of two battery pieces, wherein a field lens is arranged above the welding strip, and a focusing point of the field lens is aligned to the welding strip to be welded;
S2, a laser generator emits a laser beam, the laser beam enters a beam combining lens after passing through a light path cavity of the beam combining lens seat, the laser beam is reflected by the beam combining lens to enter a vibrating lens and is reflected to a field lens through the vibrating lens, the field lens focuses the laser beam to a proper size, and then the laser beam is focused to act on the welding strip to form a welding spot for laser welding;
S3, infrared heat radiation reflected at the welding point on the welding strip sequentially passes through the field lens, the vibrating mirror and the beam combining mirror and then is incident on the reflecting mirror, and then is reflected to the pyrometer through the reflecting mirror to carry out temperature detection, and the pyrometer controls the output power of the laser generator according to the actually measured temperature, so that accurate laser welding is realized.
6. A temperature controlled laser welding method according to claim 5, wherein: in the step S3, the welding temperature in the pyrometer is 350-450 ℃, the pyrometer controls the laser output power in real time according to the measured temperature so as to control the temperature of the welding point, and the control frequency is 10KHZ.
7. A temperature controlled laser welding method according to claim 5, wherein: the welding strip is a flat welding strip.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910364923.8A CN109926718B (en) | 2019-04-30 | 2019-04-30 | Temperature-control laser welding system and method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910364923.8A CN109926718B (en) | 2019-04-30 | 2019-04-30 | Temperature-control laser welding system and method |
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| CN109926718A CN109926718A (en) | 2019-06-25 |
| CN109926718B true CN109926718B (en) | 2024-06-21 |
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| CN113664369A (en) * | 2021-07-22 | 2021-11-19 | 深圳泰德激光科技有限公司 | Laser welding system, method, controller, and computer-readable storage medium |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103182605A (en) * | 2013-03-21 | 2013-07-03 | 常州镭赛科技有限公司 | Laser welding machine |
| CN107570870A (en) * | 2017-10-18 | 2018-01-12 | 大族激光科技产业集团股份有限公司 | A kind of welding method of power battery module connection sheet |
| CN209919103U (en) * | 2019-04-30 | 2020-01-10 | 苏州沃特维自动化系统有限公司 | Temperature control laser welding system |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE10343080A1 (en) * | 2003-09-17 | 2005-04-21 | Raylase Ag | Device for steering and focusing a laser beam in the direction of a target object comprises a focusing unit for focusing the laser beam, a rotating X-mirror, a rotating Y-mirror, and a stationary field mirror for receiving the deviated beam |
| CN206824823U (en) * | 2017-04-14 | 2018-01-02 | 深圳市普盛激光设备有限公司 | A kind of laser soldering device |
| CN108044231A (en) * | 2018-01-09 | 2018-05-18 | 深圳市海目星激光智能装备股份有限公司 | A kind of laser welding head of coaxial optical path |
| CN108465933B (en) * | 2018-02-13 | 2020-04-07 | 深圳吉阳智能科技有限公司 | Method and device for laser welding of foil and tab |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103182605A (en) * | 2013-03-21 | 2013-07-03 | 常州镭赛科技有限公司 | Laser welding machine |
| CN107570870A (en) * | 2017-10-18 | 2018-01-12 | 大族激光科技产业集团股份有限公司 | A kind of welding method of power battery module connection sheet |
| CN209919103U (en) * | 2019-04-30 | 2020-01-10 | 苏州沃特维自动化系统有限公司 | Temperature control laser welding system |
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