CN214602523U - Integral annular belt laser welding device - Google Patents
Integral annular belt laser welding device Download PDFInfo
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- CN214602523U CN214602523U CN202023144467.3U CN202023144467U CN214602523U CN 214602523 U CN214602523 U CN 214602523U CN 202023144467 U CN202023144467 U CN 202023144467U CN 214602523 U CN214602523 U CN 214602523U
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Abstract
An integral annular laser welding device comprises a laser, a collimating lens, a conical lens, a focusing lens and a reflector; wherein, the laser is used for generating a light source; the collimating lens is used for expanding the light source into parallel light beams; the cone lens is used for refracting the parallel light beams into annular light beams; the focusing mirror is used for focusing the annular light beam to form a focused light beam, and the focused light beam is in a circular ring shape on a focal plane; the reflector has a reflecting surface for changing the direction of the focused light beam to change the position of the focal plane. The utility model discloses a light path design is ingenious, the design is succinct, has avoided the catadioptric loss furthest, and then has reduced the temperature of organism, has improved the utilization efficiency of light energy. The utility model discloses a focus ring diameter's is adjustable to realized multi-angle welding, extended application range by a wide margin, made the whole girdle welding of laser possible on engineering application, and made it to have practical application and spreading value.
Description
Technical Field
The utility model belongs to the technical field of the laser welding technique and specifically relates to a whole clitellum laser welding device is related to.
Background
In industrial production, laser welding is mostly adopted for annular welding of thin-wall tubular parts. Laser welding is an efficient precision welding method using a laser beam with high energy density as a heat source, has small heating area and concentrated heat source, and has the advantages that other welding methods do not have. The traditional annular laser welding is realized by rotating a laser beam or a workpiece, and welding deformation of the workpiece caused by uneven heating is inevitably caused due to great temperature difference between a welding part and a non-welding part.
The method for fundamentally solving the problems is integral annular welding, namely, laser is focused into a ring shape, and meanwhile, a welding area is heated and welded. The 201620269423.8 patent discloses an annular laser welding head that consists of a collimating lens, a first conical lens, a second conical lens, and a focusing lens. Although the patent can focus laser into a circular ring with adjustable diameter, the reflection angle of the annular beam which is diverged in a conical surface when the annular beam enters the second conical lens is too large, the optical energy loss is serious, the annular beam is not suitable for the application of high-power laser, and the annular beam is a fatal defect for welding. The patent of application No. 201620532840.7 discloses a laser welding device, wherein a laser source is incident on the conical surface of a conical total reflection mirror through a light source leading-in device, and is reflected to an annular total reflection focusing mirror through the conical total reflection mirror, and is focused and reflected on a working platform through the annular total reflection focusing mirror to form an annular light spot. For the concave surface of the annular full-reflection focusing mirror, only the reflection of the parabolic concave surface to the parallel light can form a fixed focus, and the reflection of the concave surface with the other shapes to the parallel light cannot form a focus, that is, the heat energy of the laser cannot be concentrated. For the circular total-reflection focusing mirror with the parabolic concave surface, the position of the focus can be changed only by changing the curvature of the parabola, but the change is not practical and cannot be applied. Thus, the diameter of the focusing ring is fixed and non-adjustable no matter how the lift pins are moved. In addition, the focused beams of the two patents are convergent, and only welds from a certain direction outside the workpiece can be welded, but welds from the inside of the workpiece and welds from other angles cannot be welded.
For annular laser welding, if the effective utilization of light energy cannot be realized, the diameter of a focusing ring cannot be adjusted, or multi-angle welding cannot be realized, the practical application and popularization value is unavailable, and how to realize the effective utilization of light energy, the adjustment of the diameter of the focusing ring and the multi-angle welding is a technical problem which is always solved and unsolved by the technical personnel in the field.
SUMMERY OF THE UTILITY MODEL
In order to overcome not enough in the background art, the utility model discloses a whole clitellum laser welding device, its aim at: the laser welding device has the advantages that the effective utilization of light energy, the adjustment of the diameter of the focusing ring and multi-angle welding are realized, the integral ring belt welding of the laser becomes possible, and the laser welding device has practical application value.
In order to realize the purpose of the utility model, the utility model adopts the following technical scheme:
an integral endless belt laser welding apparatus comprising:
a laser for generating a light source;
the collimating lens expands the light source into parallel light beams;
the cone lens refracts the parallel light beams into annular light beams;
and the focusing mirror focuses the annular light beam to form a focused light beam, and the focused light beam is in an annular shape on a focal plane.
The technical scheme is further improved, and the device further comprises a reflector, wherein the reflector is provided with a reflecting surface, and the reflecting surface is used for changing the direction of the focused light beam so as to change the position of a focal plane.
Further improve technical scheme, the reflector can move axially.
According to the technical scheme, the reflecting surface is an inner cylindrical surface or an inner conical surface.
According to the technical scheme, the reflecting surface is an outer cylindrical surface or an outer conical surface.
In a further development, the reflector is made of quartz.
The technical scheme is further improved, and the reflecting surface of the reflector is plated with a reflecting film.
In a further improved technical scheme, at least one of the cone lens and the focusing lens can move axially.
According to the technical scheme, the focusing mirror is axially moved near the crossing position of the annular light beams.
Owing to adopt above-mentioned technical scheme, compare the background art, the utility model discloses following beneficial effect has:
the utility model discloses a light path design is ingenious, the design is succinct, has avoided the catadioptric loss furthest, and then has reduced the temperature of organism, has improved the utilization efficiency of light energy.
The utility model discloses a focus ring diameter's is adjustable to realized multi-angle welding, extended application range by a wide margin, made the whole girdle welding of laser possible on engineering application, and made it to have practical application and spreading value.
Drawings
Fig. 1 is an optical path diagram of the present invention in embodiment 1.
Fig. 2 is a diagram showing the distribution of light energy in the focal plane.
Fig. 3 is a diagram showing an optical path when the reflector is cylindrical in example 2 of the present invention.
Fig. 4 is a diagram of an optical path when the reflector is in the shape of a circular column in example 2 of the present invention.
Fig. 5 is a light path diagram of the present invention in the case of embodiment 2 in which the reflector has an inner conical shape.
Fig. 6 is a light path diagram of the present invention in the case of the outer cone shape of the reflector in embodiment 2.
In the figure: 1. a fiber laser; 2. a collimating mirror; 3. an axicon lens; 4. a convex lens; 5. a reflector; 51. a reflective surface; 6. and (5) a workpiece.
Detailed Description
Preferred embodiments of the present invention will be described below with reference to the accompanying drawings. It should be understood by those skilled in the art that these embodiments are only for explaining the technical principle of the present invention, and are not intended to limit the scope of the present invention.
Example 1:
the utility model provides an integral clitellum laser welding device, as shown in figure 1, including casing, laser instrument, collimating mirror 2, tapered lens 3 and focusing mirror, because other annex such as casing are conventional structure, not the utility model discloses a key point, do not tired here and state again.
The laser is a fiber laser 1 for generating a light source. The light source output by the optical fiber laser 1 is in Gaussian light distribution, and the NA value is between 0.12 and 0.22.
The collimator lens 2 is used for expanding the light source into parallel beams. And appropriate collimation parameters are adapted according to the parameters of the light source, so that the light source expands into parallel light beams.
The axicon lens 3 can refract the parallel light beam into an annular light beam with a certain bandwidth, wherein the annular light beam converges and then diverges, and a cross region is formed. Due to the bandwidth, the light energy of the annular light beam cannot be concentrated and cannot be directly used for welding.
The focusing mirror is used for focusing the annular light beam to form a focused light beam. The focusing lens is a convex lens 4, after the focusing lens 4 focuses, the bandwidth of the annular light beam is sharply reduced, and the shape of the focused light beam on a focal plane is a circular ring. At this time, the light energy is highly concentrated and creates a high temperature zone in the form of a ring on the focal plane. Fig. 2 is a diagram showing the distribution of light energy in the focal plane. As can be seen from the figure, the light energy is the largest and the heat energy is the highest in the annular region.
For the annular welding of the workpiece 6, the annular high-temperature area can simultaneously and uniformly melt the welding area, thereby fundamentally solving the welding deformation of the workpiece 6 caused by uneven heating.
Only realize focusing the adjustable of ring diameter, be applicable to the annular welding of arbitrary diameter work piece 6, the utility model discloses just have practical use value. In the present invention, axial movement occurs in any of the axicon lens 3 and the convex lens 4, and the diameter of the focusing ring can be changed. In the present embodiment, the axicon lens 3 is fixed, and the convex lens 4 is located near the intersection of the annular beams and moves left and right in the axial direction. At different moving positions, the diameters of the annular light beams entering the convex lens 4 are different, and the diameters of focusing rings obtained on a focal plane after being focused by the convex lens 4 are different. Since the convex lens 4 is axially moved near the intersection position of the annular light beams, the annular light beams enter the convex lens 4 almost perpendicularly, and therefore, the spherical reflection of the convex lens 4 is small and the loss of light energy is also small.
As shown in fig. 1, since the focused light beam is divergent in this embodiment, the circular welding of the weld bead in the workpiece 6 can be easily performed.
Example 2:
in embodiment 1, the angle of the circular welding is limited, and for practical application, the shape of the workpiece 6 is various, and the position of the weld seam is also variable, so that the circular welding of any angle on the workpiece 6 needs to be realized. For further improvement, the whole annular laser welding device further comprises a reflector 5, wherein the reflector 5 is provided with a reflecting surface 51, and the reflecting surface 51 is used for changing the direction of a focused light beam so as to change the position of a focal plane.
As shown in fig. 3, the reflector 5 is cylindrical and made of quartz, and a reflective film is coated on a cylindrical surface of the reflector 5, which is a reflective surface 51. The weld of the workpiece 6 is an outer fillet weld, and a focusing circular ring is formed at the outer fillet weld after the focusing light beam is reflected by the reflecting surface 51.
Similarly, as shown in fig. 4, the reflector 5 may be in the shape of a circular column, and the inner annular surface thereof is the reflecting surface 51, which obviously provides the same technical effects.
As shown in fig. 5, the reflector 5 has an inner conical reflecting surface 51, the weld of the workpiece 6 is blocked by the projection, and the focused light beam is reflected by the reflecting surface 51 to form a focused ring at the weld around the blocking of the projection.
As shown in fig. 6, the reflector 5 has an outer conical reflecting surface 51, the weld of the workpiece 6 is blocked by the projection inside, and the focused light beam is reflected by the reflecting surface 51 to form a focused ring at the weld around the blocking of the projection.
As can be seen from the above, the reflector 5 can reflect the focused light beam and change the position of the focal plane. The diameter of the focusing ring changes correspondingly while the position of the focal plane changes, and at this time, the convex lens 4 needs to be moved axially to adjust the diameter of the focusing ring so as to meet the requirement of the diameter of a welding seam.
In conclusion, the light path of the utility model is simple, the refraction and reflection loss is avoided to the maximum extent, the temperature of the machine body is further reduced, and the utilization efficiency of the light energy is improved; the utility model discloses a focus ring diameter's is adjustable to multi-angle welding has been realized, it is possible on engineering application to make the whole girdle welding of laser, and makes it have practical application and spreading value.
The details of which are not described in the prior art. Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (9)
1. The utility model provides an integral clitellum laser welding device which characterized by: the method comprises the following steps:
a laser for generating a light source;
the collimating lens expands the light source into parallel light beams;
the cone lens refracts the parallel light beams into annular light beams;
and the focusing mirror focuses the annular light beam to form a focused light beam, and the focused light beam is in an annular shape on a focal plane.
2. An integral endless laser welding apparatus as defined in claim 1, wherein: the reflector is provided with a reflecting surface which is used for changing the direction of the focused light beam so as to change the position of the focal plane.
3. An integral endless laser welding apparatus as defined in claim 2, wherein: the reflector is axially movable.
4. An integral endless laser welding apparatus as claimed in claim 2 or 3, wherein: the reflecting surface is an inner cylindrical surface or an inner conical surface.
5. An integral endless laser welding apparatus as claimed in claim 2 or 3, wherein: the reflecting surface is an outer cylindrical surface or an outer conical surface.
6. An integral endless laser welding apparatus as defined in claim 2, wherein: the reflector is made of quartz.
7. An integral endless laser welding apparatus as claimed in claim 2 or 6, wherein: and the reflecting surface of the reflector is plated with a reflecting film.
8. An integral endless laser welding apparatus as defined in claim 1, wherein: at least one of the cone lens and the focusing lens can move axially.
9. An integral endless laser welding apparatus as defined in claim 1, wherein: the focusing mirror is moved axially near the intersection of the annular beams.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023144467.3U CN214602523U (en) | 2020-12-24 | 2020-12-24 | Integral annular belt laser welding device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023144467.3U CN214602523U (en) | 2020-12-24 | 2020-12-24 | Integral annular belt laser welding device |
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| CN214602523U true CN214602523U (en) | 2021-11-05 |
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| CN202023144467.3U Active CN214602523U (en) | 2020-12-24 | 2020-12-24 | Integral annular belt laser welding device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114706211A (en) * | 2022-04-19 | 2022-07-05 | 江苏亮点光电科技有限公司 | Light beam transmission direction adjusting device based on wedge-shaped mirror pair |
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2020
- 2020-12-24 CN CN202023144467.3U patent/CN214602523U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114706211A (en) * | 2022-04-19 | 2022-07-05 | 江苏亮点光电科技有限公司 | Light beam transmission direction adjusting device based on wedge-shaped mirror pair |
| CN114706211B (en) * | 2022-04-19 | 2023-07-07 | 江苏亮点光电科技有限公司 | Beam transmission direction adjusting device based on wedge-shaped mirror pair |
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