CN220761296U - Light path structure, device and system of laser welding device - Google Patents

Abstract

The utility model provides an optical path structure, a device and a system of a laser welding device, comprising: a plurality of optical path units; each optical path unit includes: the laser device comprises a laser device and a shaping lens group for shaping the output beam of the laser device, wherein the shaping lens group is arranged on a transmission light path of the output beam of the laser device; and the beam emitted by at least one light path unit in the plurality of light path units after being shaped is projected to the part to be welded so as to realize laser welding. According to the utility model, different light path units are automatically switched and lightened through the plurality of light path units, so that light spots with different sizes and shapes are obtained for laser welding, and the method is applicable to one-time processing of weldments with various types of bonding pads, and the laser input position is not required to be adjusted online or the type of lens is not required to be replaced, so that the method is intelligent and flexible, has strong universality, and greatly improves the operation efficiency of laser welding.

Description

Light path structure, device and system of laser welding device

Technical Field

The utility model belongs to the field of laser soldering, and particularly relates to an optical path structure, device and system of a laser welding device.

Background

Laser soldering belongs to one type of laser processing, and takes laser as a heating source, and utilizes laser energy to rapidly heat a bonding pad, when the temperature reaches the melting point temperature of tin solder, the solder melts, and a substrate and a lead are wetted by the solder to form a welding spot. Because the laser soldering adopts non-contact type, the local part heats rapidly, and the welding is completed when the heat energy is not completely conducted to the welding point, the laser soldering has the characteristics of high efficiency, no mechanical stress damage, high heating speed and small heat affected zone. The method is widely applied to the fields of electronic industry, automobile electronic manufacturing industry, intelligent electrical appliances, electronic components, motor electronics, CCM modules, VCM motor coils and the like.

In the existing laser soldering tin processing system, one or more optical lenses are arranged in a soldering head, so that laser shaping and focusing are carried out to form a light spot which is projected onto a soldering substrate for soldering. Because the position of the lens is fixed, the focal position of the emergent light beam is also fixed, and batch soldering treatment can be performed only for the bonding pads of the same model on the weldment. In an actual soldering operation, a plurality of soldering lands of different sizes and different shapes are sometimes simultaneously present on a kind of weldment, and it is necessary to use laser spots of corresponding sizes and shapes for soldering. The spot size of the laser beam projected onto the pad is typically adjusted by adjusting the spacing between the laser input and the lens group; or the laser welding heads are replaced by corresponding laser welding heads according to the shape of the welding target, and then soldering is performed. In the above mode, the operation is quite tedious, the debugging time is long, the intelligent degree is low, and the welding efficiency is low.

In combination with the prior art, the utility model is urgent to provide a laser soldering tin processing system capable of automatically adjusting the size and shape of a light spot, which can perform batch soldering tin processing on bonding pads with different sizes and shapes on a weldment, and improve the flexibility and universality of a laser soldering tin.

Disclosure of Invention

Aiming at the defects of the prior art, the utility model aims to provide an optical path structure, an optical path device and an optical path system of a laser welding device, and aims to solve the problem that the size and the shape of a light spot cannot be automatically adjusted by the existing laser welding device.

To achieve the above object, in a first aspect, the present utility model provides an optical path structure of a laser welding apparatus, comprising: a plurality of optical path units;

each optical path unit includes: the laser device comprises a laser device and a shaping lens group for shaping the output beam of the laser device, wherein the shaping lens group is arranged on a transmission light path of the output beam of the laser device;

and the beam emitted by at least one light path unit in the plurality of light path units after being shaped is projected to the part to be welded so as to realize laser welding.

Optionally, the light beams emitted after shaping at least two light path units in the plurality of light path units are projected to the part to be welded so as to realize laser welding.

Alternatively, the shapes of the laser spots of the plurality of optical path units projected onto the parts to be welded are not exactly the same.

Alternatively, the laser spots of the plurality of optical path units projected onto the member to be welded are identical in shape.

Alternatively, the laser spots of the plurality of optical path units projected onto the parts to be welded are not identical in size.

Alternatively, the laser spots of the plurality of optical path units projected onto the member to be welded are the same in size.

Specifically, the size and shape of the laser spots projected onto the parts to be welded by each light path unit are regulated and controlled by the shaping lens group.

Alternatively, the centers of the laser spots of the plurality of optical path units projected onto the member to be welded do not entirely overlap.

Alternatively, the centers of the laser spots of the plurality of optical path units projected onto the member to be welded overlap.

Specifically, the position of the laser spot projected onto the part to be welded by each light path unit can be regulated and controlled through the arrangement and setting of the light path.

Optionally, the at least one optical path unit further includes: and the reflecting mirror is used for reflecting the light beam shaped by the shaping lens group to the part to be welded.

Optionally, the shaping lens group includes: at least one slow axis collimating cylindrical lens and at least one fast axis collimating cylindrical lens.

When the laser is a semiconductor laser, in one example, the shaping lens group includes one fast axis collimating cylindrical lens and at least one slow axis collimating cylindrical lens. In other examples, multiple fast axis collimating cylindrical lenses may also be required.

It will be appreciated that when the laser is of other types, the shaping lens set may comprise other types of lenses or focussing lenses etc., which the utility model is not intended to be exhaustive or limiting in any way.

In a second aspect, the present utility model provides a laser welding apparatus comprising a control module and the optical path structure described in the first aspect or any of the first aspects optionally;

the control module is connected with the light path structure and is used for controlling at least one light path unit in the light path structure to reshape the light beam output by the laser and then transmit the reshaped light beam to the part to be welded.

Optionally, the control module includes: a plurality of switching circuits;

a switching circuit is connected to a laser for controlling the laser to be turned on or off.

In a third aspect, the present utility model provides a laser welding system comprising a laser welding apparatus as described in the second aspect or any of the second aspects optionally.

In general, the above technical solutions conceived by the present utility model have the following beneficial effects compared with the prior art:

the utility model provides a light path structure, a device and a system of a laser welding device, wherein the light path structure comprises a plurality of light path units, different light path units are lightened through switching, the shape and the size of laser spots projected to a part to be welded by each light path unit can be regulated and controlled, the spots with different sizes and shapes can be obtained on the part to be welded for soldering tin, the device and the system can be suitable for processing weldments with various types of bonding pads at one time, the laser input position does not need to be regulated on line or the type of a lens is replaced, the intelligent is flexible, the universality is strong, and the operation efficiency of soldering tin is greatly improved.

Drawings

FIG. 1 is a block diagram of a laser welding apparatus according to an embodiment of the present utility model;

FIG. 2 is a schematic diagram of an optical path according to an embodiment of the present utility model;

FIG. 3 is a schematic view of a different spot shape according to an embodiment of the present utility model;

FIG. 4 is a schematic view of another optical path according to an embodiment of the present utility model;

FIG. 5 is a schematic view of another different spot shape provided by an embodiment of the present utility model;

the same reference numbers are used throughout the drawings to reference like elements or structures, wherein: 100 is an optical path structure, 200 is a control module, 300 is a laser spot, 110 is an optical path unit, 111 is a laser, 112 is a fast axis collimating cylindrical lens, 1131 is a slow axis collimating cylindrical lens, 1132 is another slow axis collimating cylindrical lens, and 114 is a reflecting mirror.

Detailed Description

For convenience of understanding, the following explains and describes english abbreviations and related technical terms related to the embodiments of the utility model.

Embodiments of the present utility model will be described below with reference to the accompanying drawings in the embodiments of the present utility model.

The utility model provides an optical path structure, an optical path structure and an optical path device and an optical path system of a laser welding device, which aim to solve the problem that welding cannot be efficiently performed on bonding pads with different sizes and shapes in the prior art. After being shaped by a laser shaping lens group, the laser beam from the laser device forms a laser beam with a required shape to irradiate the welded object. The control module can freely set the size and shape of the laser spot irradiated on the welded object by controlling the specified light path unit to be lightened.

As shown in fig. 1, the structure of the laser welding apparatus provided by the present utility model includes: an optical path structure 100 and a control module 200;

the optical path structure 100 includes: a plurality of optical path units 110; each optical path unit includes: a laser 111 and a shaping lens group for shaping the laser output beam, the shaping lens group being disposed on a transmission optical path of the laser output beam; and the beam emitted by at least one light path unit in the plurality of light path units after being shaped is projected to the part to be welded so as to realize laser welding.

Illustratively, the light beams emitted after the shaping of at least two light path units in the plurality of light path units are projected to the part to be welded, so as to realize laser welding.

In addition, the control module 300 is connected to the optical path structure 100, and is used for controlling at least one optical path unit 110 in the optical path structure 100 to transmit the beam output by the laser to the component to be welded after shaping.

Optionally, the control module 200 includes: a plurality of switching circuits;

a switching circuit is connected to a laser for controlling the laser to be turned on or off.

Alternatively, the laser spots 300 of the plurality of optical path units 110 projected onto the parts to be welded are not identical in shape.

Alternatively, the laser spots 300 of the plurality of optical path units 110 projected onto the parts to be welded are identical in shape.

Alternatively, the laser spots 300 of the plurality of optical path units 110 projected onto the parts to be welded are not identical in size.

Alternatively, the laser spots 300 of the plurality of optical path units 110 projected onto the parts to be welded are the same in size.

Alternatively, the centers of the laser spots 300 of the plurality of optical path units 110 projected onto the parts to be welded do not completely overlap.

Alternatively, the centers of the laser spots 300 of the plurality of optical path units 110 projected onto the parts to be welded overlap.

Referring to fig. 2, at least one optical path unit 110 in the optical path structure further includes: and a reflecting mirror 114 for reflecting the beam shaped by the shaping lens group to the component to be welded.

Alternatively, the laser may be a semiconductor laser or other type of laser, and when a semiconductor laser is used, the shaping lens group includes: at least one slow axis collimating cylindrical lens and at least one fast axis collimating cylindrical lens 112. Wherein the slow axis collimating cylindrical lens comprises at least one of 1131 and 1132.

It should be noted that the lenses illustrated in the present utility model are only for illustration, and those skilled in the art may select different types of lenses or lens combinations to perform the functions of the shaping lens set according to actual needs, so the present utility model is not limited in any way to the specific type and kind of lenses.

Further, the control module 200 includes a microprocessor and a plurality of switch circuits, and each switch circuit is connected to the lasers of each optical path unit one by one. The microprocessor receives information such as the shape and the size of a welded object input from the outside, analyzes and determines a light path unit to be lightened, controls a specified switch circuit to be conducted, and emits laser beams to solder when the corresponding light path unit is lightened.

Specifically, the microprocessor can select a commonly used MCU;

specifically, the switching circuit can be a common MOS tube and a driving circuit thereof, and can be used only by a mode of realizing line on-off. The above may be specifically selected as needed, and is not limited herein.

Specifically, the external information input mode can be acquired through a CCD camera, or can be manually input through a computer input interface, and can be specifically selected according to the needs without limitation.

In one example, each optical path unit 110 includes a laser, a fast axis collimating cylindrical lens, a slow axis collimating cylindrical lens, and a plane mirror for changing the direction of a light beam, which are sequentially arranged at a light outlet of the laser. The laser beam emitted by the lighted laser diverges to the surrounding, and after being shaped and collimated by the fast axis collimating cylindrical lens and the slow axis collimating cylindrical lens, the laser beam is reflected by the plane reflecting mirror to form a welding spot on the welded object.

In one example, each optical path unit can shape light spots with different sizes and shapes by selecting fast and slow axis collimating cylindrical lenses with different focal lengths, or using different numbers of slow axis collimating cylindrical lenses, or arranging the slow axis collimating cylindrical lenses at different positions to change the travelling path of the laser beam from the slow axis collimating cylindrical lenses to the welded object.

As shown in fig. 2, a schematic diagram of an optical path structure provided in embodiment 1 of the present utility model is provided, where the optical path structure of this embodiment has 5 optical path units (the actual number is not limited to 5), and the corresponding optical path units are respectively lightened, so that 5 corresponding light spots can be formed on the welded object. The switching of the light path units to light different light paths is controlled, at least 9 welding light spots with different shapes and sizes can be formed in a combined mode, as shown in fig. 3, the shaded parts are the light spots which are lightened, and 1-9 represent different light spot combinations.

As shown in fig. 4, a schematic diagram of an optical path structure provided in embodiment 2 of the present utility model is provided, where the optical path structure in this embodiment has 7 optical path units, and the corresponding optical path units are respectively lightened, so that 7 corresponding light spots can be formed on the welded object. The light path units are controlled to be switched on, at least 20 different light spot shapes and sizes can be formed by combining, as shown in fig. 5, the shaded parts are the lightened light spots, and 1-20 represent different light spot combinations.

Referring to the light spots shown in fig. 3 and 5, the present utility model can provide light spot combinations with different shapes and sizes, each path of light path unit can form a light spot on a welded object, the shapes and sizes of any two light spots can be different, and the light spot centers between the light spots can not overlap, so as to control the diversity of the light spot combinations. The light path structure forms a light spot combination on the welded object, the shape and the size of the specific light spot combination can be flexibly adjusted according to the shape and the size of the welded object, and the control module is used for controlling the opening of the light path units. The size and shape of the output light spot of the single light path unit are adjusted by a shaping lens group in the single light path unit.

Based on the above principle, by setting different numbers of light path units, setting the size and shape of the light spot shaped by each light path unit and controlling the specified light path unit to be lightened, light spots with various sizes and shapes can be obtained, and the description is omitted here.

It is to be understood that the terms such as "comprises" and "comprising," which may be used in this utility model, indicate the presence of the disclosed functions, operations or elements, and are not limited to one or more additional functions, operations or elements. In the present utility model, terms such as "comprising" and/or "having" may be construed to mean a particular feature, number, operation, constituent element, component, or combination thereof, but may not be construed to exclude the presence or addition of one or more other features, numbers, operations, constituent elements, components, or combination thereof.

Furthermore, in the present utility model, the expression "and/or" includes any and all combinations of the words listed in association. For example, the expression "a and/or B" may include a, may include B, or may include both a and B.

In describing embodiments of the present utility model, it should be noted that the term "coupled" should be interpreted broadly, unless otherwise explicitly stated and defined, for example, the term "coupled" may be either detachably coupled or non-detachably coupled; may be directly connected or indirectly connected through an intermediate medium.

The foregoing is merely illustrative of the present utility model, and the present utility model is not limited thereto, and any person skilled in the art will readily recognize that variations or substitutions are within the scope of the present utility model. Therefore, the protection scope of the present utility model shall be subject to the protection scope of the claims.

Claims (13)

1. An optical path structure of a laser welding apparatus, comprising: a plurality of optical path units;

each optical path unit includes: the laser device comprises a laser device and a shaping lens group for shaping the output beam of the laser device, wherein the shaping lens group is arranged on a transmission light path of the output beam of the laser device;

and the beam emitted by at least one light path unit in the plurality of light path units after being shaped is projected to the part to be welded so as to realize laser welding.

2. The optical path structure according to claim 1, wherein the beam emitted from the at least two optical path units among the plurality of optical path units after being shaped is projected to the member to be welded to achieve laser welding.

3. The optical path structure according to claim 2, wherein the laser spots of the plurality of optical path units projected onto the member to be welded are not identical in shape.

4. The optical path structure according to claim 2, wherein the laser spots of the plurality of optical path units projected onto the member to be welded are identical in shape.

5. The optical path structure according to any one of claims 1 to 4, wherein the laser spots of the plurality of optical path units projected onto the member to be welded are not identical in size.

6. The optical path structure according to any one of claims 1 to 4, wherein the laser spots of the plurality of optical path units projected onto the member to be welded are the same in size.

7. The optical path structure according to any one of claims 1 to 4, wherein centers of laser spots of a plurality of optical path units projected onto the member to be welded do not entirely overlap.

8. The optical path structure according to any one of claims 1 to 4, wherein centers of laser spots of a plurality of optical path units projected onto the member to be welded overlap.

9. The optical path structure according to any one of claims 1 to 4, wherein at least one optical path unit further comprises: and the reflecting mirror is used for reflecting the light beam shaped by the shaping lens group to the part to be welded.

10. The light path structure of any one of claims 1 to 4, wherein the shaping lens group comprises: at least one slow axis collimating cylindrical lens and at least one fast axis collimating cylindrical lens.

11. A laser welding apparatus comprising a control module and an optical path structure as claimed in any one of claims 1 to 10;

the control module is connected with the light path structure and is used for controlling at least one light path unit in the light path structure to reshape the light beam output by the laser and then transmit the reshaped light beam to the part to be welded.

12. The apparatus of claim 11, wherein the control module comprises: a plurality of switching circuits;

a switching circuit is connected to a laser for controlling the laser to be turned on or off.

13. A laser welding system comprising a laser welding apparatus as claimed in claim 11 or 12.