CN215615790U - Coaxial temperature measurement visual focusing laser welding head - Google Patents
Coaxial temperature measurement visual focusing laser welding head Download PDFInfo
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- CN215615790U CN215615790U CN202122094829.0U CN202122094829U CN215615790U CN 215615790 U CN215615790 U CN 215615790U CN 202122094829 U CN202122094829 U CN 202122094829U CN 215615790 U CN215615790 U CN 215615790U
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Abstract
The utility model relates to the field of laser welding, in particular to a coaxial temperature-measuring vision focus-adjustable laser welding head, wherein a laser emission barrel, a first three-way pipe structure, a second three-way pipe structure and a main body of an image acquisition barrel are sequentially and linearly connected to form a linear barrel-shaped structure; the first three-way pipe structure and the second three-way pipe structure are respectively connected with the laser incident optical fiber and the temperature detection assembly, meanwhile, the image acquisition barrel is connected with the digital camera, and the second end of the temperature measurement lens barrel is connected with the infrared temperature measurement assembly; a reflection lens is arranged in the reflection pipe barrel structure, a first beam combining lens is arranged in the first three-way pipe structure, and the first beam combining lens is used for enabling light rays emitted by the laser emitting optical fiber to be emitted to the laser emitting barrel through the first beam combining lens; a second beam combining lens is arranged in the second three-way pipe structure. The laser welding head can complete coaxial temperature measurement of a laser welding position, can complete coaxial imaging of the welding position and can realize adjustment of a welding focus position.
Description
Technical Field
The utility model relates to the field of laser welding, in particular to a coaxial temperature measurement visual focusing laser welding head.
Background
Laser welding is an efficient precision welding method using a laser beam with high energy density as a heat source. Laser welding is one of the important aspects of laser material processing technology application, and in practical application, the laser welding is mainly used for welding thin-wall materials and low-speed welding, and the welding process belongs to a heat conduction type, namely, laser radiation heats the surface of a workpiece, surface heat is diffused inwards through heat conduction, and the workpiece is melted to form a specific molten pool by controlling parameters such as the width, energy, peak power, repetition frequency and the like of laser pulses. Due to the unique advantages, the welding method is successfully applied to the precise welding of micro and small parts.
In laser welding, the laser welding head functions singly. Firstly, the temperature of a welding spot cannot be controlled without coaxial temperature measurement, so that the welding spot is easily burnt due to overhigh temperature and is desoldered due to overlow temperature. And secondly, coaxial imaging is not available, so that the position of a welding spot, particularly a tiny welding spot, cannot be monitored in the welding process, and welding spot dislocation, welding deviation and the like are easily caused. Thirdly, different products are required to be replaced frequently in a production line, the heights of welding points of the different products are different, and if the welding points are welded by the same focus, the positions of the welding points are out-of-focus positions, so that the welding quality is influenced.
SUMMERY OF THE UTILITY MODEL
In order to solve the problems, the coaxial temperature measurement visual focusing laser welding head provided by the utility model can complete coaxial temperature measurement of a laser welding position, can complete coaxial imaging of the welding position and can realize adjustment of a welding focus position.
In order to achieve the purpose, the technical scheme of the utility model is as follows:
the coaxial temperature measurement visual focusing laser welding head comprises a laser injection barrel, a laser injection optical fiber, a reflection pipe barrel structure, a laser emission barrel, a first three-way pipe structure, a second three-way pipe structure, an image acquisition barrel and a temperature measurement lens barrel, wherein the first end of the first three-way pipe connection structure is connected with the laser emission barrel, the second end of the first three-way pipe connection structure is connected with the first end of the reflection pipe barrel structure, the third end of the first three-way pipe connection structure is connected with the first end of the second three-way pipe structure, the second end of the second three-way pipe structure is connected with the first end of the temperature measurement lens barrel, the third end of the second three-way pipe structure is connected with the first end of the image acquisition barrel, and the laser emission barrel, the first three-way pipe structure, the second three-way pipe structure and the main body of the image acquisition barrel are sequentially and linearly connected to form a linear barrel structure; the second end of the image acquisition cylinder is connected with a digital camera; the second end of the reflection tube barrel structure is connected with the first end of the laser injection barrel, and the second end of the laser injection barrel is connected with the laser injection optical fiber; the second end of the temperature measuring lens barrel is connected with the infrared temperature measuring component;
the reflecting tube barrel structure is internally provided with a reflecting lens, the reflecting lens is used for reflecting light rays emitted by the laser emitting optical fibers to the first three-way tube structure, the first three-way tube structure is internally provided with a first beam combining lens, and the first beam combining lens is used for enabling the light rays emitted by the laser emitting optical fibers to be emitted to the laser emitting tube through the first beam combining lens; and a second beam combining lens is arranged in the second three-way pipe structure and is used for reflecting an infrared pipe formed by light rays emitted by the laser emission barrel to the infrared temperature measurement assembly.
Preferably, the second end of the laser input cylinder is provided with an adjusting mechanism for adjusting the position of the laser output fiber in the axial direction of the laser input cylinder.
Preferably, a collimating lens group for adjusting the collimating position of the light emitted by the laser emitting optical fiber is arranged in the laser emitting cylinder.
Preferably, the group of collimating lenses has optical lenses comprising at least three convex lenses.
Preferably, a focusing lens group for focusing light emitted by the laser emitting optical fiber is arranged in the laser emitting barrel.
Preferably, the first beam combining lens and the second beam combining lens are both one-way reflecting lenses.
Preferably, a decoloring imaging lens group for decoloring the light reflected by the digital camera is provided in the image capturing tube.
The utility model has the beneficial effects that:
1. because infrared temperature measurement subassembly passes through the reflection effect of second beam combining lens, the infrared ray that forms when laser jet-out optic fibre model could the splice welding passes first beam combining lens to gather infrared temperature measurement subassembly by the reflection of second beam combining lens, make infrared temperature measurement subassembly form the coaxial temperature measurement effect to the welding position, infrared temperature measurement subassembly feeds back welding point temperature often, guarantee that welding point temperature is invariable, and then the uncontrollable solder joint temperature has been avoided, cause the too high burnt that becomes of solder joint temperature easily, the drawback of the too low desoldering of temperature.
2. Because the digital camera directly faces the welding position, the digital camera and the welding position form coaxial imaging, and because of the multi-sheet achromatic imaging effect of the achromatic imaging lens group, the digital camera can directly and clearly see the image of the welding position, so that the image of the welding position can be directly used, and the condition of the welding position can be conveniently observed.
3. Due to the arrangement of the adjusting mechanism in the laser injecting cylinder, the laser injecting optical fiber can move axially, specifically, due to the axial movement of the laser injecting optical fiber, the distance from the laser injecting optical fiber to the collimating lens group is changed, so that the size of a quasi-value light spot is changed, and finally, the position change of a focusing focus is formed.
This soldered connection design is exquisite, compact structure, and because the combination of the multiunit optical lens that sets up in this soldered connection, this soldered connection has the measuring ability of excellent laser focus regulating power and laser welding position.
Drawings
FIG. 1 is a schematic axial view of a coaxial thermometric visual focusable laser weld head of the present invention.
FIG. 2 is a cross-sectional view of a coaxial thermometric visual focusable laser weld head of the present invention.
The reference numerals include:
10-a laser incidence barrel, 11-a laser emission optical fiber, 12-an adjusting mechanism, 13-a collimating lens group, 20-a reflecting tube barrel structure, 21-a reflecting lens, 30-a laser emission barrel, 31-a focusing lens group, 40-a first three-way tube structure, 41-a first beam combining lens, 50-a second three-way tube structure, 51-a second beam combining lens, 60-an image acquisition barrel, 61-a digital camera, 62-a achromatic imaging lens group, 70-a temperature measurement lens barrel and 71-an infrared temperature measurement component.
Detailed Description
The present invention is described in detail below with reference to the attached drawings.
As shown in fig. 1 and fig. 2, the coaxial temperature-measuring visual focusing laser welding head provided in this embodiment includes a laser injecting tube 10, a laser emitting fiber 11, a reflecting tube structure 20, a laser emitting tube 30, a first three-way tube structure 40, a second three-way tube structure 50, an image collecting tube 60, and a temperature-measuring lens barrel 70, wherein the first end of the first three-way pipe connecting structure is connected with the laser emission barrel 30, the second end of the first three-way pipe connecting structure is connected with the first end of the reflection pipe barrel structure 20, the third end of the first three-way pipe connecting structure is connected with the first end of the second three-way pipe structure 50, the second end of the second three-way pipe structure 50 is connected with the first end of the temperature measuring lens barrel 70, the third end of the second three-way pipe structure 50 is connected with the first end of the image acquisition barrel 60, and the main bodies of the laser emission tube 30, the first three-way tube structure 40, the second three-way tube structure 50 and the image acquisition tube 60 are sequentially connected linearly to form a linear tubular structure; the second end of the image acquisition barrel 60 is connected with a digital camera 61; the second end of the reflection tube barrel structure 20 is connected with the first end of the laser incident barrel 10, and the second end of the laser incident barrel 10 is connected with the laser emergent optical fiber 11; the second end of the temperature measuring lens barrel 70 is connected with an infrared temperature measuring component 71; a reflection lens 21 is arranged in the reflection tube barrel structure 20, the reflection lens 21 is used for reflecting the light emitted by the laser emitting optical fiber 11 to the first three-way tube structure 40, a first beam combining lens 41 is arranged in the first three-way tube structure 40, and the first beam combining lens 41 is used for emitting the light emitted by the laser emitting optical fiber 11 to the laser emitting tube 30 through the first beam combining lens 41; a second beam combining lens 51 is arranged in the second three-way pipe structure 50, and the second beam combining lens 51 is used for reflecting an infrared pipe formed by light rays emitted by the laser emission barrel 30 to the infrared temperature measurement component 71.
Preferably, the second end of the laser injection cylinder 10 is provided with an adjustment mechanism 12 for adjusting the position of the laser emission fiber 11 in the axial direction of the laser injection cylinder 10. The laser incident tube 10 is provided with a collimating lens group 13 for adjusting the collimating position of the light emitted from the laser emitting fiber 11. The collimator lens group 13 has optical lenses including at least three convex lenses. The laser emitting tube 30 is provided with a focusing lens group 31 for focusing the light emitted from the laser emitting fiber 11. The first beam combining lens 41 and the second beam combining lens 51 are both the half mirror 21.
An achromatic lens group 62 for achromatic-erasing light reflected by the digital camera 61 is provided in the image pickup cylinder 60.
The detailed structure and operation of the laser welding head are described in detail below.
Specifically, in this embodiment, the laser injecting cylinder 10 is used as a main body of the welding laser injecting assembly, the second end of the laser injecting cylinder 10 is connected to the laser emitting optical fiber 11, so that the laser emitted from the laser emitting optical fiber 11 connected to the second end of the laser injecting cylinder 10 is injected into the collimating lens group 13 through the laser injecting cylinder 10, in this embodiment, the collimating lens group 13 adopts a combination of a convex lens, a concave lens and a concave lens, and the laser injecting collimating lens group 13 performs a collimating process on the laser line, and preferably, the outer annular surface of the laser injecting cylinder 10 has annular tooth structures arranged at intervals, and the annular tooth structures serve as heat dissipation fins of the laser injecting cylinder 10.
The reflector tube structure 20 has a tubular main body structure, and the reflector tube structure 20 has a substantially triangular cross section, wherein the reflector plate 21 is disposed in the reflector tube structure 20. In this embodiment, the reflecting surface of the reflector 21 forms an angle of 45 ° with the direction of the laser emitting fiber 11, so that the light emitted from the laser emitting fiber 11 is incident into the first three-way tube structure 40 through the reflector 21.
In this embodiment, a first beam combining lens 41 is disposed in the first three-way structure, the light emitted by the laser beam is totally reflected by the first beam combining lens 41, and the reflecting surface of the first beam combining lens 41 is parallel to the reflecting lens 21, so that the laser beam reflected by the reflecting lens 21 is reflected by the first beam combining lens 41 and then enters the laser emission tube 30, and since the focusing lens group 31 is disposed in the laser emission tube 30, the laser emitted by the laser beam is finally emitted out of the laser emission tube 30 through the focusing lens group 31 after the laser emitted by the laser beam is adjusted by the collimating lens group 13, reflected by the reflecting lens 21, and reflected by the first beam combining lens 41. Due to the focusing effect of the focusing lens, the laser light exiting the focusing emitter barrel forms a focal point formed by the welder laser under the focusing emitter barrel as shown in fig. 2. The above is a traveling path of the laser beam emitted by the laser emission light.
In this embodiment, the first three-way tube structure 40 serves to connect the laser beam to the barrel in the first aspect, and serves to return the laser beam formed by welding at the welding laser forming focus to the barrel again so as to detect and observe the returned laser beam in the following process.
Specifically, in this embodiment, one end of the second three-way tube structure 50 is connected to the first three-way tube structure 40, and the other two ends are respectively connected to the image collecting barrel 60 and the temperature measuring lens barrel 70.
In this embodiment, the second combining lens 51 is disposed inside the second three-way tube structure 50, and in this embodiment, the second combining lens 51 is perpendicular to the first combining lens 41 and perpendicular to the reflective mirror 21. The light formed by welding when two welding bodies are welded at the laser focus, i.e. the welding position, is incident to the laser emission barrel 30, the first beam combining lens 41 fully projects the light formed by welding, so the light formed by welding can be input into the second three-way pipe structure 50 without loss basically, after the light formed by welding enters the second three-way pipe structure 50, the second beam combining lens 51 in the second three-way pipe structure 50 performs partial reflection and partial projection processing on the light, wherein the infrared part is reflected by the second beam combining lens 51 and then is incident to the temperature measuring lens barrel 70, and the rest part is incident to the image acquisition barrel 60.
The infrared temperature measuring component 71 arranged in the temperature measuring lens barrel 70 can detect the temperature of the laser welding position in an infrared detection mode. If the temperature is too high or too low, namely the temperature of the laser welding position exceeds a threshold value, an over-temperature alarm is formed. The light beam entering the image capturing tube 60 is subjected to achromatic processing by the achromatic imaging lens group 62 and then captured by the digital camera 61, and the digital camera 61 can observe the laser welding position, that is, the welding condition at the laser focus.
Because infrared temperature measurement subassembly 71 passes through the reflection effect of second beam combining lens 51, the infrared ray that forms when laser emission optic fibre 11 model could the welding junction welding passes first beam combining lens 41, and gather infrared temperature measurement subassembly 71 by the reflection of second beam combining lens 51, make infrared temperature measurement subassembly 71 form the coaxial temperature measurement effect to the welding position, infrared temperature measurement subassembly 71 feeds back welding point temperature often, guarantee that welding point temperature is invariable, and then the uncontrollable solder joint temperature has been avoided, cause the too high scorching that becomes of solder joint temperature easily, the drawback of the too low desoldering of temperature.
Because digital camera 61 directly faces the welding position, digital camera 61 forms coaxial formation of image with to the welding position, because the multi-disc achromatism imaging effect of achromatism formation of image lens group 62, digital camera 61 can directly see the welding position image clearly for the image of welding position is directly usable, conveniently observes the condition of welding position.
Due to the arrangement of the adjusting mechanism 12 in the laser injecting cylinder 10, the laser emitting fiber 11 can move axially, specifically, due to the axial movement of the laser emitting fiber 11, the distance from the laser emitting fiber 11 to the collimating lens group 13 changes, so that the size of the quasi-value light spot is changed, and finally the change of the position of the focusing focus is formed.
The foregoing is only a preferred embodiment of the present invention, and many variations in the detailed description and the application range can be made by those skilled in the art without departing from the spirit of the present invention, and all changes that fall within the protective scope of the utility model are therefore considered to be within the scope of the utility model.
Claims (7)
1. Coaxial temperature measurement vision laser welder head of focusing, its characterized in that: the laser shooting device comprises a laser shooting barrel, a laser shooting optical fiber, a reflection pipe barrel structure, a laser shooting barrel, a first three-way pipe structure, a second three-way pipe structure, an image acquisition barrel and a temperature measurement lens barrel, wherein the first end of the first three-way pipe connection structure is connected with the laser shooting barrel, the second end of the first three-way pipe connection structure is connected with the first end of the reflection pipe barrel structure, the third end of the first three-way pipe connection structure is connected with the first end of the second three-way pipe structure, the second end of the second three-way pipe connection structure is connected with the first end of the temperature measurement lens barrel, the third end of the second three-way pipe structure is connected with the first end of the image acquisition barrel, and the laser shooting barrel, the first three-way pipe structure, the second three-way pipe structure and the main body of the image acquisition barrel are sequentially and linearly connected to form a linear barrel-shaped structure; the second end of the image acquisition cylinder is connected with a digital camera; the second end of the reflection tube barrel structure is connected with the first end of the laser injection barrel, and the second end of the laser injection barrel is connected with the laser injection optical fiber; the second end of the temperature measuring lens barrel is connected with the infrared temperature measuring component;
the reflecting tube barrel structure is internally provided with a reflecting lens, the reflecting lens is used for reflecting light rays emitted by the laser emitting optical fibers to the first three-way tube structure, the first three-way tube structure is internally provided with a first beam combining lens, and the first beam combining lens is used for enabling the light rays emitted by the laser emitting optical fibers to be emitted to the laser emitting tube through the first beam combining lens; and a second beam combining lens is arranged in the second three-way pipe structure and is used for reflecting an infrared pipe formed by light rays emitted by the laser emission barrel to the infrared temperature measurement assembly.
2. The coaxial thermometric, visually focusable laser welding head of claim 1, wherein: and the second end of the laser injection cylinder is provided with an adjusting mechanism for adjusting the axial position of the laser injection optical fiber on the laser injection cylinder.
3. The coaxial thermometric, visually focusable laser welding head of claim 1, wherein: and a collimating lens group for adjusting the collimating position of the light emitted by the laser emitting optical fiber is arranged in the laser emitting cylinder.
4. The coaxial thermometric, visually focusable laser welding head of claim 3, wherein: the collimating lens group has an optical lens comprising at least three convex lenses.
5. The coaxial thermometric, visually focusable laser welding head of claim 1, wherein: and a focusing lens group for focusing light rays emitted by the laser emitting optical fiber is arranged in the laser emitting cylinder.
6. The coaxial thermometric, visually focusable laser welding head of claim 1, wherein: the first beam combining lens and the second beam combining lens are both one-way reflecting lenses.
7. The coaxial thermometric, visually focusable laser welding head of claim 1, wherein: and a color-reducing imaging lens group used for reducing the color of the light reflected to the digital camera is arranged in the image acquisition cylinder.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122094829.0U CN215615790U (en) | 2021-09-01 | 2021-09-01 | Coaxial temperature measurement visual focusing laser welding head |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122094829.0U CN215615790U (en) | 2021-09-01 | 2021-09-01 | Coaxial temperature measurement visual focusing laser welding head |
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| Publication Number | Publication Date |
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| CN215615790U true CN215615790U (en) | 2022-01-25 |
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| CN202122094829.0U Active CN215615790U (en) | 2021-09-01 | 2021-09-01 | Coaxial temperature measurement visual focusing laser welding head |
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2021
- 2021-09-01 CN CN202122094829.0U patent/CN215615790U/en active Active
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