CN216938953U

CN216938953U - Laser welding device

Info

Publication number: CN216938953U
Application number: CN202123448945.4U
Authority: CN
Inventors: 孙乔; 张德胜; 蒋崟; 张建华
Original assignee: Superstar Shenzhen Automation Co ltd
Current assignee: Superstar Shenzhen Automation Co ltd
Priority date: 2021-12-30
Filing date: 2021-12-30
Publication date: 2022-07-12
Anticipated expiration: 2031-12-30

Abstract

The present invention provides a laser welding apparatus, comprising: the mounting frame is provided with a first channel and a second channel, and the first channel and the second channel are communicated and intersected; the light source is arranged on the mounting rack and emits laser along the extending direction of the first channel; the first lens is arranged at the joint of the first channel and the second channel; the second lens is arranged at one end of the second channel far away from the first channel; the photoelectric conversion device is arranged below the first lens; the first lens can reflect the laser to the second lens, and the photoelectric conversion device can receive the laser transmitted from the first lens. The technical scheme of the utility model can effectively solve the problem that the laser energy in the related technology can not be monitored on line in real time.

Description

Laser welding device

Technical Field

The utility model relates to the field of laser welding, in particular to a laser welding device.

Background

With the rapid development of laser technology, the demand for the use amount of laser welding equipment is continuously improved. Whether the laser energy led out by the laser welding equipment is stable becomes a key problem for improving the stability of the laser welding. The fluctuation of the laser energy can directly influence the welding effect, and the defective rate of products is improved.

However, the fluctuation of laser energy derived from the existing laser equipment is often difficult to detect, and only when the defective product rate is remarkably increased, an operator stops the machine for maintenance, and tests the laser energy derived from the laser welding equipment through a laser power meter, so as to draw a conclusion whether the laser energy meets the standard or not. The current laser power meter is of a thermoelectric conversion type, the one-time conversion time is about 6 seconds, and a detection device for monitoring the laser energy value in real time on a production line is not available at present.

SUMMERY OF THE UTILITY MODEL

The utility model mainly aims to provide a laser welding device to solve the problem that laser energy in the related art cannot be monitored in real time on line.

In order to achieve the above object, according to one aspect of the present invention, there is provided a laser welding apparatus comprising: the mounting frame is provided with a first channel and a second channel, and the first channel and the second channel are communicated and intersected; the light source is arranged on the mounting frame and emits laser along the extending direction of the first channel; the first lens is arranged at the joint of the first channel and the second channel; the second lens is arranged at one end of the second channel far away from the first channel; the photoelectric conversion device is arranged below the first lens; the first lens can reflect the laser to the second lens, and the photoelectric conversion device can receive the laser transmitted from the first lens.

Further, the photoelectric conversion device comprises an optical signal receiver, a photoelectric converter connected with the optical signal receiver, and an electrical signal output device electrically connected with the photoelectric converter.

Further, the laser welding device also comprises a control device which is in communication connection with the electric signal output device.

Furthermore, the laser welding device also comprises a prompting device connected with the control device.

Further, the laser welding apparatus further includes: the lifting structure comprises a lifting platform and a lifting arm arranged on the lifting platform, one end of the lifting arm is connected with the lifting platform in a sliding mode, and the other end of the lifting arm is connected with the mounting frame.

Further, the laser welding device also comprises a collimating mirror arranged on the mounting frame, and the collimating mirror is arranged between the light source and the first lens.

Furthermore, the first channel extends along the vertical direction, the second channel is perpendicular to the first channel, and an included angle between the reflecting surface of the first lens and the vertical direction is 45 degrees.

Further, the laser welding apparatus further includes: the galvanometer comprises a plurality of adjusting lenses, one of the adjusting lenses forms a second lens, and the galvanometer further comprises a driving device which drives the adjusting lenses to rotate so as to adjust the falling point of the laser.

Further, the laser welding apparatus further includes: and the field lens is arranged below the laser outlet of the vibrating lens.

Further, the first mirror is capable of reflecting laser light having a wavelength between 1050nm and 1100 nm.

By applying the technical scheme of the utility model, the laser irradiates the first lens after passing through the light source, the first lens reflects the laser onto the second lens, the laser can be projected onto a workpiece after being reflected by the second lens, a laser drop point is formed on the workpiece, and the workpiece is welded by the energy of the laser drop point. The first lens can reflect most laser and see through a small part of laser, the laser that the first lens sees through is the energy loss that laser produced through first lens, because the below of first lens is provided with photoelectric conversion device, photoelectric conversion device can receive the laser that first lens sees through to convert light signal into the signal of telecommunication. Before the laser welding device works, the energy value of a laser drop point and the electric signal value measured by the photoelectric conversion device need to be detected for multiple times, the electric signal value measured by the electric conversion device and the energy value of the laser drop point are fit into a calculation formula, and an objective function taking the electric signal value measured by the electric conversion device as an input quantity and the energy value of the laser drop point as an output quantity is constructed. Because the photoelectric conversion device can measure the electric signal value on a production line in real time, the energy value of the laser drop point can be calculated through the objective function, the online real-time monitoring of the energy value of the laser drop point is realized, the technical understanding of operators on the energy fluctuation of the laser drop point is facilitated, and the qualified rate of laser welding is further improved.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the utility model and, together with the description, serve to explain the utility model and not to limit the utility model. In the drawings:

fig. 1 shows a schematic perspective view of an embodiment of a laser welding device according to the utility model; and

fig. 2 shows a schematic view of the laser welding device of fig. 1.

Wherein the figures include the following reference numerals:

1. a first channel; 2. a second channel; 10. a mounting frame; 20. a light source; 30. a first lens; 40. a second lens; 50. a photoelectric conversion device; 60. a lifting structure; 61. a lifting platform; 62. a lifting arm; 70. a collimating mirror; 80. a galvanometer; 90. and a field lens.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the utility model, its application, or uses. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.

The relative arrangement of the components and steps, the numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present invention unless specifically stated otherwise. Meanwhile, it should be understood that the sizes of the respective portions shown in the drawings are not drawn in an actual proportional relationship for the convenience of description. Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate. In all examples shown and discussed herein, any particular value should be construed as exemplary only and not as limiting. Thus, other examples of the exemplary embodiments may have different values. It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, further discussion thereof is not required in subsequent figures.

As shown in fig. 1 and 2, the laser welding apparatus of the present embodiment includes: mounting bracket 10, light source 20, first lens 30 and second lens 40. The mounting frame 10 is provided with a first channel 1 and a second channel 2, and the first channel 1 is communicated with the second channel 2 and arranged in an intersecting manner; the light source 20 is arranged on the mounting frame 10 and emits laser along the extending direction of the first channel 1; the first lens 30 is arranged at the joint of the first channel 1 and the second channel 2; the second lens 40 is arranged at one end of the second channel 2 far away from the first channel 1; a photoelectric conversion device 50 disposed below the first lens 30; the first mirror 30 can reflect the laser beam onto the second mirror 40, and the photoelectric conversion device 50 can receive the laser beam transmitted from the first mirror 30.

By applying the technical scheme of the embodiment, the laser passes through the light source 20 and then irradiates the first lens 30, the first lens 30 reflects the laser to the second lens 40, the laser can be projected onto a workpiece after being reflected by the second lens 40, a laser drop point is formed on the workpiece, and the workpiece is welded by the energy of the laser drop point. The first lens 30 can reflect most of the laser light to transmit a small portion of the laser light, the laser light transmitted by the first lens 30 is energy loss generated when the laser light passes through the first lens 30, and since the photoelectric conversion device 50 is disposed below the first lens 30, the photoelectric conversion device 50 can receive the laser light transmitted by the first lens 30 and convert the optical signal into an electrical signal. Before the laser welding device works, the energy value of the laser falling point and the electric signal value measured by the photoelectric conversion device 50 need to be detected for multiple times, the electric signal value measured by the photoelectric conversion device 50 and the energy value of the laser falling point are fitted into a calculation formula, and an objective function taking the electric signal value measured by the photoelectric conversion device 50 as an input quantity and the energy value of the laser falling point as an output quantity is constructed. Because the photoelectric conversion device 50 can measure the electric signal value on the production line in real time, the energy value of the laser drop point can be calculated through the objective function, the online real-time monitoring of the energy value of the laser drop point is realized, the technical understanding of the energy fluctuation of the laser drop point by an operator is facilitated, and the qualified rate of laser welding is further improved.

It should be noted that, in the present embodiment, the included angle between the first channel 1 and the second channel 2 is 90 °.

In the present embodiment, the photoelectric conversion device 50 includes an optical signal receiver, a photoelectric converter connected to the optical signal receiver, and an electrical signal output device electrically connected to the photoelectric converter. In the structure, the photoelectric converter converts the optical signal into the electrical signal at a high speed, and compared with a laser power meter in the background art, the photoelectric converter can greatly improve the output speed of the electrical signal and further can quickly obtain the energy value of a laser drop point. The structure can reduce the hysteresis of the output of the electric signal value and improve the accuracy of the laser drop point energy value measured by the laser welding device.

In this embodiment, the laser welding device further comprises a control device in communication with the electrical signal output device. In the structure, the lowest standard value of the laser energy can be preset in the control device, when the actual electric signal value output by the electric signal output device is smaller than the lowest standard value, the control device can judge that the energy value of the laser drop point is unqualified, and an operator can conveniently and timely overhaul the laser welding device.

In this embodiment, the laser welding apparatus further includes a prompting device connected to the control device. In the structure, when the control device judges that the energy value of the laser drop point is unqualified, the prompting device can remind an operator, so that the operator can find the lower condition of the energy value of the laser drop point in time. It should be noted that the prompting device may be a signal lamp or an alarm.

As shown in fig. 1 and 2, in the present embodiment, the laser welding apparatus further includes a field lens 90 disposed below the laser exit of the galvanometer 80. The field lens 90 can play a role in converging laser beams, and the focal point of the laser beams can fall on a workpiece by adjusting the position of the lifting arm 62, so that the welding effect of the laser welding device on the workpiece is improved.

It should be noted that, the distance from the focal point formed after the laser beam is converged by the same field lens to the lower surface of the field lens is fixed, but when different workpieces are welded, because of the height difference between the workpieces, the height of the mounting frame 10 needs to be adjusted, so that the focal point of the laser beam just falls on the surface of the workpiece, which is convenient for welding the workpieces. As shown in fig. 1, in the present embodiment, the laser welding apparatus further includes a lifting structure 60, the lifting structure 60 includes a lifting table 61 and a lifting arm 62 disposed on the lifting table 61, one end of the lifting arm 62 is slidably connected to the lifting table 61, and the other end of the lifting arm 62 is connected to the mounting block 10. In the above structure, the lifting arm 62 can move on the lifting platform 61, so as to drive the mounting frame 10 to approach or leave the workpiece, and the focus of the laser beam is conveniently made to fall on the surface of the workpiece.

As shown in fig. 1 and 2, in the present embodiment, the laser welding apparatus further includes a collimator lens 70 disposed on the mounting frame 10, and the collimator lens 70 is disposed between the light source 20 and the first mirror 30. In the above structure, the collimator 70 can adjust the divergent laser beam into a parallel laser beam, the first mirror 30 reflects the parallel laser beam onto the second mirror 40, and the second mirror 40 reflects the laser beam onto the workpiece to weld the workpiece.

As shown in fig. 1 and 2, in the present embodiment, the first channel 1 extends in a vertical direction, the second channel 2 is disposed perpendicular to the first channel 1, and an angle between the reflection surface of the first lens 30 and the vertical direction is 45 °. In the above structure, the light source 20 is perpendicular to the mounting frame 10, the first lens 30 is located right below the light source 20, and an included angle between the reflection surface of the first lens 30 and the vertical direction is 45 °, so that parallel light beams emitted from the light source 20 can be reflected to the second lens 40 by the first lens 30 as much as possible, and energy loss of laser light in a reflection path is reduced.

As shown in fig. 1 and 2, in the present embodiment, the laser welding apparatus further includes a galvanometer 80, the galvanometer 80 includes a plurality of adjusting mirrors, one of the plurality of adjusting mirrors forms the second mirror 40, and the galvanometer 80 further includes a driving device for driving the adjusting mirror to rotate, and the driving device drives the adjusting mirror to rotate to adjust the landing point of the laser. In the above structure, the laser emitted from the light source 20 irradiates on the first lens 30, the first lens 30 reflects the laser onto the second lens 40, the second lens 40 reflects the laser onto the other adjusting lenses in the galvanometer 80 again, and after the laser is reflected by the other adjusting lenses in the galvanometer 80, the laser penetrates out of the laser outlet of the galvanometer 80 and is projected onto a workpiece. The actual falling point of the laser is adjusted through the vibrating mirror 80, so that the laser welding device is changed from a single-spot welding device to a welding device with the laser falling point capable of continuously moving, and the universality of the laser welding device is improved.

As shown in fig. 1 and 2, in the present embodiment, the first lens 30 is capable of reflecting laser light having a wavelength between 1050nm and 1100 nm. The laser with the wavelength has higher energy density, and is convenient for welding workpieces. Specifically, the wavelength of the laser light may be 1050nm, 1080nm, or 1100 nm.

In the description of the present invention, it is to be understood that the orientation or positional relationship indicated by the orientation words such as "front, rear, upper, lower, left, right", "lateral, vertical, horizontal" and "top, bottom", etc. are usually based on the orientation or positional relationship shown in the drawings, and are only for convenience of description and simplicity of description, and in the case of not making a reverse description, these orientation words do not indicate and imply that the device or element being referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore, should not be considered as limiting the scope of the present invention; the terms "inner and outer" refer to the inner and outer relative to the profile of the respective component itself.

Spatially relative terms, such as "above … …", "above … …", "above … …", "above", and the like, may be used herein for ease of description to describe one device or feature's spatial relationship to another device or feature as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if a device in the figures is turned over, devices described as "above" or "on" other devices or configurations would then be oriented "below" or "under" the other devices or configurations. Thus, the exemplary term "above … …" can include both an orientation of "above … …" and "below … …". The device may be otherwise variously oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.

It should be noted that the terms "first", "second", and the like are used to define the components, and are only used for convenience of distinguishing the corresponding components, and the terms have no special meanings unless otherwise stated, and therefore, the scope of the present invention should not be construed as being limited.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A laser welding apparatus, comprising:

the mounting frame (10) is provided with a first channel (1) and a second channel (2), and the first channel (1) and the second channel (2) are communicated and arranged in an intersecting way;

a light source (20) arranged on the mounting frame (10) and emitting laser along the extending direction of the first channel (1);

a first lens (30) arranged at the junction of the first channel (1) and the second channel (2);

the second lens (40) is arranged at one end of the second channel (2) far away from the first channel (1);

a photoelectric conversion device (50) disposed below the first lens (30);

wherein the first mirror (30) is capable of reflecting laser light onto the second mirror (40), and the photoelectric conversion device (50) is capable of receiving the laser light transmitted from the first mirror (30).

2. The laser welding apparatus according to claim 1, wherein the photoelectric conversion apparatus (50) includes an optical signal receiver, a photoelectric converter connected to the optical signal receiver, and an electrical signal output device electrically connected to the photoelectric converter.

3. The laser welding apparatus of claim 2, further comprising a control device communicatively coupled to the electrical signal output.

4. The laser welding apparatus as recited in claim 3, further comprising a prompting device coupled to the control device.

5. The laser welding apparatus according to claim 1, characterized in that the laser welding apparatus further comprises:

elevation structure (60), elevation structure (60) include elevating platform (61) and set up in lift arm (62) on elevating platform (61), the one end of lift arm (62) with elevating platform (61) sliding connection, the other end of lift arm (62) with mounting bracket (10) are connected.

6. The laser welding device according to claim 1, characterized in that it further comprises a collimator lens (70) arranged on the mounting frame (10), the collimator lens (70) being arranged between the light source (20) and the first mirror (30).

7. The laser welding device according to claim 1, characterized in that the first channel (1) extends in a vertical direction, the second channel (2) is arranged perpendicular to the first channel (1), and the angle between the reflective surface of the first mirror (30) and the vertical direction is 45 °.

8. The laser welding apparatus according to claim 1, characterized in that the laser welding apparatus further comprises:

a galvanometer (80), the galvanometer (80) including a plurality of adjustment optics, one of the plurality of adjustment optics forming the second optic (40), the galvanometer (80) further including: and the driving device drives the adjusting lens to rotate so as to adjust the falling point of the laser.

9. The laser welding apparatus according to claim 8, characterized in that the laser welding apparatus further comprises:

and the field lens (90) is arranged below the laser outlet of the galvanometer (80).

10. The laser welding device according to claim 1, characterized in that the first mirror (30) is capable of reflecting laser light having a wavelength between 1050nm and 1100 nm.