CN219966763U - Laser welding head and laser welding equipment - Google Patents

Abstract

The utility model belongs to the technical field of laser welding, and particularly discloses a laser welding head and laser welding equipment, wherein the laser welding head comprises a joint assembly, a collimation mechanism, a reflection assembly, a galvanometer assembly and a focusing assembly which are sequentially connected, the collimation mechanism comprises a collimation lens seat, a collimation assembly and a focusing assembly, the upper end of the collimation lens seat is connected with the lower end of the joint assembly and is provided with a collimation light cavity penetrating in the vertical direction, the collimation assembly is arranged in the collimation light cavity in a sliding manner and is used for collimating laser emitted by a laser generator into parallel light beams, and the focusing assembly is arranged outside the collimation lens seat and is used for driving the collimation assembly to move along the vertical direction. The laser welding apparatus includes a laser welding head. The laser welding head and the laser welding equipment disclosed by the utility model can improve the convenience of adjustment in the welding process, so that the welding flexibility is improved, different welding requirements are met, and the welding quality is improved.

Description

Laser welding head and laser welding equipment

Technical Field

The utility model relates to the technical field of laser welding, in particular to a laser welding head and laser welding equipment.

Background

Laser welding is widely applied to the fields of automobiles, ships, aerospace, and the like because of the advantages of high energy density, high precision, no contact during welding, small loss and the like.

The prior art provides a laser welding head device, and it is including the joint component, collimation subassembly, shake mirror subassembly and the focusing assembly that connect gradually, and wherein, the collimation subassembly is used for collimating into parallel light beam to laser, shakes the mirror subassembly and includes shake lens and shakes the mirror driving piece, shakes mirror driving piece drive and shakes the lens along predetermineeing the orbit swing to reach the effect that the welding seam widened.

In the prior art, although welding treatment of welding seams with different widths can be met through the arrangement of the vibrating mirror, for welding of multi-station products, as plane height differences exist between different stations or the welding positions of different products of the same station are different, the positions of focus required by welding are different. However, the existing laser welding equipment can only focus by changing a focusing mirror in a focusing assembly or integrally moving a laser welding head device, so that the focusing efficiency is low, and the welding efficiency is affected.

Disclosure of Invention

An object of the present utility model is to provide a laser welding head, which improves focusing convenience of the laser welding head and welding efficiency and welding quality of the laser welding head.

Another object of the present utility model is to provide a laser welding apparatus to improve welding efficiency and welding quality.

In order to achieve the above purpose, the present utility model adopts the following technical scheme:

a laser welding head comprising:

the upper end of the joint assembly is used for being in butt joint with the laser generator;

the collimating mechanism comprises a collimating lens seat, a collimating assembly and a focusing assembly, wherein the upper end of the collimating lens seat is connected with the lower end of the joint assembly and is provided with a collimating optical cavity penetrating in the vertical direction, the collimating assembly is arranged in the collimating optical cavity in a sliding manner and is used for collimating laser emitted by the laser generator into parallel beams, and the focusing assembly is arranged on the outer side of the collimating lens seat and is used for driving the collimating lens unit to move in the vertical direction;

the reflecting component is connected to the lower end of the collimating lens seat and used for changing the propagation direction of the parallel light beams;

the vibrating mirror assembly is connected to the light emitting side of the reflecting assembly and comprises a vibrating mirror plate, and the vibrating mirror plate can swing around a set axis and convert the light beam reflected by the reflecting assembly into a vertical light beam;

and the focusing assembly is arranged at the lower side of the galvanometer assembly and is used for focusing the vertical light beam.

As an alternative solution of the laser welding head, the focusing assembly includes:

the mounting shell is mounted on the outer side of the collimating lens seat;

the focusing driving assembly is arranged in the mounting shell, a mounting opening is formed in one side, facing the focusing assembly, of the collimating lens seat, and the driving end of the focusing driving assembly extends into the mounting opening and is connected with the collimating assembly.

As an alternative technical scheme of the laser welding head, the mounting shell comprises a first shell part and a second shell part which are detachably buckled and connected, the first shell part is positioned between the second shell part and the collimating lens seat, and the focusing driving assembly is mounted on the first shell part;

and/or the focusing driving assembly is provided with a moving part moving along the vertical direction, the outer side wall of the moving part is provided with indication scales, and a plurality of indication scales are arranged at intervals along the vertical direction; one side of the installation shell is provided with a visual window, and the visual window and the indication scale are arranged right opposite to each other.

As an alternative technical scheme of the laser welding head, the mounting shell is provided with a perspective mirror, the perspective mirror covers the visual window, the perspective mirror is provided with an indication mark, the indication mark is exposed through the visual window, and at least part of the indication scale can move to be aligned with the indication mark;

And/or the interval between two adjacent indication scales is 0.5 mm-1.5 mm.

As an alternative technical scheme of the laser welding head, the laser welding head is provided with a controller and a focus detection device, the focus detection device is used for detecting the focus position during welding, the focus detection device and the focusing driving assembly are both in communication connection with the controller, and the controller controls the operation of the focusing driving assembly according to the focus position.

As an alternative solution of the laser welding head, the laser welding head further includes a collimation protection component, and the collimation protection component includes:

the fixed lens seat is connected between the joint assembly and the collimating lens seat, the fixed lens seat is provided with a protection cavity which is directly opposite to and communicated with the collimating optical cavity, and one side of the fixed lens seat is provided with a drawing port;

the protection mirror assembly is installed in the protection cavity and used for enabling laser to vertically pass through, and the protection mirror assembly can pass through the drawing port to enter and exit the protection cavity.

As an alternative technical scheme of laser welding head, shake the lens have two just be first lens and second lens that shakes respectively, first lens that shakes can be around first default axis swing, second lens that shakes can be around second default axis swing, first lens that shakes be used for with the light beam reflection of reflection subassembly extremely the second lens that shakes, the second lens that shakes is used for the light beam conversion that will accept the vertical light beam, first default axis is along the X direction or relative the X direction is default contained angle setting, the second default axis is along the Y direction extension, the X direction Y direction with two mutual verticals in vertical direction.

As an alternative solution of the laser welding head, the galvanometer assembly further includes:

the light inlet side of the vibrating mirror seat is connected with the reflecting component, the light outlet side of the vibrating mirror seat is connected with the focusing component, the vibrating mirror seat is provided with a containing cavity and a vibrating mirror light cavity which are arranged in an up-down separation mode, and the first vibrating mirror and the second vibrating mirror are positioned in the vibrating mirror light cavity;

the first driving unit is arranged in the accommodating cavity and used for driving the first vibrating lens to swing;

the second driving unit is arranged in the accommodating cavity and is used for driving the second vibrating lens to swing;

the control assembly is arranged in the accommodating cavity and is in communication connection with the first driving unit and the second driving unit;

and the vibrating mirror cooling assembly is arranged at the bottom of the accommodating cavity and is connected with the control assembly.

As an alternative to the laser welding head, the focusing assembly includes:

the upper end of the focusing lens seat is connected with the vibrating lens assembly, the focusing lens seat is provided with a focusing optical cavity which is communicated in the vertical direction, a ball plunger is arranged on the outer side of the focusing lens seat, and the ball of the ball plunger protrudes out of the outer side wall of the focusing lens seat;

The focusing lens is arranged in the focusing lens seat and is used for focusing the vertical light beam;

the installation sleeve is sleeved on the outer side of the lower end of the focusing lens seat, an annular groove is formed in the inner side wall of the upper end of the installation sleeve, the ball head can squeeze into or withdraw from the groove, and a protective lens is arranged in the installation sleeve.

As an alternative solution of the laser welding head, the laser welding head further includes an air knife assembly, and the air knife assembly includes:

the mounting frame is mounted on the outer side of the vibrating mirror assembly;

the air knife is arranged on the mounting frame and is provided with an air cavity and a plurality of air outlets, the air outlets are arranged at intervals along the length direction of the air knife, and each air outlet is communicated with the air cavity;

and the air supply unit is used for providing an air source for the air cavity.

As an alternative technical scheme of a laser welding head, the air knife is provided with an air outlet channel, the air outlet channel extends along the length direction of the air knife and is communicated with the air cavity, one of an upper channel wall and a lower channel wall of the air outlet channel is convexly provided with a plurality of protrusions, the protrusions are abutted with the other one of the upper channel wall and the lower channel wall, a plurality of protrusions are arranged at intervals along the length direction of the air knife, and an air outlet is formed between every two adjacent protrusions.

As an alternative solution of the laser welding head, the laser welding head further includes an air knife assembly, and the air knife assembly includes:

the sliding rod extends along the vertical direction, and the upper end of the sliding rod is connected to the outer side of the vibrating mirror assembly;

the air knife is sleeved on the sliding rod in a sliding manner, and at least two air knives are arranged at intervals along the vertical direction.

A laser welding apparatus comprising a laser welding head as described above.

The utility model has the beneficial effects that:

according to the laser welding head provided by the utility model, through the adoption of the collimation mechanism, the vertical movement of the collimation component in the collimation lens seat can be realized through the focusing component, so that the distance between the collimation component and the laser source is adjusted, the focusing is realized, the focusing convenience of the laser welding head can be improved, the laser focus emitted by the laser welding head can be matched with the height of the position to be welded, the difference of the welding height positions of the parts to be welded is made up, the welding effect is improved, and the welding quality is improved; meanwhile, the focusing is realized through the focusing component, so that the laser welding head can be prevented from being integrally moved or the structure of the focusing component can be prevented from being changed, on-line and real-time adjustment can be realized, the flexibility, convenience and reliability of focusing are improved, and the welding efficiency is improved.

The laser welding equipment provided by the utility model can improve the laser welding quality and the laser welding efficiency by adopting the laser welding head.

Drawings

FIG. 1 is a schematic view of a laser welding head according to an embodiment of the present utility model;

FIG. 2 is a cross-sectional view of a laser welding head provided by an embodiment of the present utility model;

FIG. 3 is a cross-sectional view of a collimation mechanism provided by an embodiment of the present utility model;

FIG. 4 is an enlarged view of a portion of FIG. 3 at I;

FIG. 5 is a schematic diagram of a split structure of a collimating cooling component provided by an embodiment of the present utility model;

FIG. 6 is a schematic diagram of an optical fiber cooling assembly according to an embodiment of the present utility model;

FIG. 7 is a cross-sectional view of an optical fiber cooling assembly provided by an embodiment of the present utility model;

FIG. 8 is a cross-sectional view of a collimation protection assembly provided by an embodiment of the utility model;

FIG. 9 is a schematic diagram of a galvanometer assembly according to an embodiment of the utility model;

FIG. 10 is a schematic view of a galvanometer assembly according to an embodiment of the utility model with an upper lens mount removed;

FIG. 11 is a schematic diagram of a split structure of an air knife according to an embodiment of the present utility model;

fig. 12 is a cross-sectional view of an air knife provided by an embodiment of the present utility model.

The figures are labeled as follows:

1. A collimation mechanism; 11. a collimating lens holder; 111. a collimation optical cavity; 12. a collimation assembly; 121. a collimating lens barrel; 1211. a limit protrusion; 122. a collimator lens unit; 1221. a lenticular lens sheet; 1222. a meniscus concave lens; 123. a clamping assembly; 1231. a gasket; 1231a, elastic washers; 124. a locking ring; 13. a focusing assembly; 131. a mounting shell; 1311. a first shell portion; 1312. a second shell portion; 1313. a visual window; 132. a focusing drive assembly; 1321. a focusing driving motor; 1322. a transmission screw; 1323. a drive nut seat; 1324. an indication scale; 133. an anti-collision structure; 134. an optoelectronic switch; 135. a guide structure; 136. a connecting piece; 137. a perspective mirror; 14. a sliding sleeve; 15. a collimation cooling assembly; 151. a cooling seat; 1511. a cooling channel; 152. a cooling plate; 153. a water inlet and outlet joint; 16. a shielding plate;

2. a galvanometer assembly; 21. a vibrating mirror base; 211. an upper lens base; 212. a lower lens base; 2121. a light inlet; 2122. a light outlet; 213. a galvanometer optical cavity; 214. a receiving chamber; 22. a first galvanometer assembly; 221. a first vibrating lens; 222. a first driving unit; 23. a second galvanometer assembly; 231. a second vibrating lens; 232. a second driving unit; 24. a control assembly; 241. a first driving plate; 242. a second driving plate; 243. DA board card; 25. a galvanometer cooling assembly;

3. A joint assembly; 31. an emission light cavity;

4. an optical fiber cooling assembly; 41. a water cooling seat; 411. an outer housing; 412. an inner housing; 4121. a mounting plate section; 413. a locking seat; 414. a water cooling channel; 42. a water inlet joint; 43. a water outlet joint;

5. a collimation protection assembly; 51. fixing the lens base; 511. the base is protected; 5111. a support ring portion; 512. a protective upper cover; 52. a protective mirror assembly; 521. a protective lens; 522. protecting the lens base; 523. an elastic support; 524. an elastic pressing member; 525. a sliding seal; 53. a drawing member; 54. a locking knob;

6. a reflective assembly; 61. a reflector base; 62. a beam splitter;

7. a visual detection component; 71. a camera; 72. detecting a light reflecting mirror; 73. a reflector mounting base; 731. detecting an optical cavity;

8. a focusing assembly; 81. a focusing lens base; 811. a focusing optical cavity; 82. a focusing lens;

9. an air knife assembly; 91. an air knife; 911. an upper tool apron; 9111. a guide surface; 912. a lower tool apron; 913. an air cavity; 914. an air inlet; 915. a protrusion; 916. an air outlet; 92. a mounting frame; 93. a slide bar; 94. and (5) connecting a block.

Detailed Description

The utility model is described in further detail below with reference to the drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the utility model and are not limiting thereof. It should be further noted that, for convenience of description, only some, but not all of the structures related to the present utility model are shown in the drawings.

In the description of the present utility model, unless explicitly stated and limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.

In the present utility model, unless expressly stated or limited otherwise, a first feature "above" or "below" a second feature may include both the first and second features being in direct contact, as well as the first and second features not being in direct contact but being in contact with each other through additional features therebetween. Moreover, a first feature being "above," "over" and "on" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is higher in level than the second feature. The first feature being "under", "below" and "beneath" the second feature includes the first feature being directly under and obliquely below the second feature, or simply means that the first feature is less level than the second feature.

In the description of the present embodiment, the terms "upper", "lower", "right", etc. orientation or positional relationship are based on the orientation or positional relationship shown in the drawings, and are merely for convenience of description and simplicity of operation, and do not indicate or imply that the apparatus or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the utility model. Furthermore, the terms "first," "second," and the like, are used merely for distinguishing between descriptions and not for distinguishing between them.

The embodiment of the utility model provides a laser welding head which is used as a part of laser welding equipment to realize laser welding of plates, pipes or other types of parts to be welded, and the laser welding head can be applied to welding scenes such as automobiles, ships, aerospace and the like.

As shown in fig. 1 and 2, the laser welding head includes a joint assembly 3, a collimation mechanism 1, a galvanometer assembly 2, a reflection assembly 6 and a focusing assembly 8, which are sequentially connected. Wherein the upper end of the joint component 3 is used for adapting a laser generator to position and fasten the starting position of a laser luminous point; the lower end of the joint component 3 is connected with a collimation mechanism 1, and the collimation mechanism 1 is used for collimating divergent light received by the joint component 3 into uniform parallel light beams and adjusting the focal distance; the reflecting component 6 is connected between the collimating mechanism 1 and the vibrating mirror component 2 and is used for changing the direction of parallel light beams which are parallel to the collimating part and reflecting the parallel light beams to the vibrating mirror part of the vibrating mirror component 2; the galvanometer assembly 2 comprises a galvanometer plate which can swing around a set axis to enlarge the area of a welding seam so as to widen the welding seam, and can convert the light beam reflected by the reflecting assembly 6 into a vertical light beam; the focusing assembly 8 is installed on the light emitting side of the galvanometer assembly 2 and is used for converting the vertical light beam into a focus to the welding material so as to realize welding.

For convenience of description, an X direction, a Y direction and a Z direction perpendicular to each other are set, wherein the Z direction is a laser incident direction, and the Z direction is a vertical direction.

Specifically, the connector assembly 3 is arranged along the Z direction, and has an emission light cavity 31 penetrating in the Z direction, and the emission light cavity 31 is used for inserting a fiber rod of the laser generator, so as to inject laser emitted by the laser generator into the emission light cavity 31 along the Z direction. The joint assembly 3 may be, but not limited to, a QBH joint, and the joint assembly 3 may be a prior art, which is not an improvement of the present utility model and will not be described in detail herein.

As shown in fig. 2, 3 and 4, the collimator mechanism 1 includes a collimator lens holder 11, a collimator assembly 12 and a focusing assembly 13. The collimating lens seat 11 extends along the Z direction, and two ends of the collimating lens seat are respectively connected with the light emitting end of the connector assembly 3 and the light entering side of the reflecting assembly 6. The collimator lens holder 11 has a collimator optical cavity 111 penetrating in the Z direction, and the collimator optical cavity 111 is in direct communication with the emission optical cavity 31. The collimating assembly 12 is slidably disposed in the collimating optical cavity 111 and is used to collimate the laser light emitted by the laser generator into a parallel beam of light to collimate the scattered laser light emitted by the fiber rod into a parallel beam of laser light. The focusing assembly 13 is connected with the collimation assembly 12 to drive the collimation assembly 12 to move along the Z direction, so that the distance between the collimation assembly 12 and the laser source is adjusted, and focusing is achieved.

According to the laser welding head provided by the embodiment, through the adoption of the collimating mechanism 1, the collimating component 12 can vertically move in the collimating lens seat 11 through the focusing component 13, so that the distance between the collimating component 12 and the laser source is adjusted, focusing is further realized, the convenience of focusing of the laser welding head can be improved, the laser focus emitted by the laser welding head can be matched with the height of a position to be welded, the welding height position difference of a workpiece to be welded is made up, the welding effect is improved, and the welding quality is improved; meanwhile, focusing is realized through the focusing component 13, so that the whole movement of a laser welding head or the change of the structure of the focusing component 8 can be avoided, on-line and real-time adjustment can be realized, the flexibility, convenience and reliability of focusing are improved, and the welding efficiency is improved.

The focusing assembly 13 includes a mounting housing 131 and a focusing driving assembly 132, wherein the mounting housing 131 is mounted outside one side of the collimating lens seat 11 and has a mounting cavity, and the focusing driving assembly 132 is mounted inside the mounting housing 131. The collimating lens seat 11 is provided with a mounting opening towards one side of the mounting shell 131, the mounting opening is communicated with the collimating optical cavity 111 and the mounting cavity, and the driving tail end of the focusing driving assembly 132 extends into the mounting opening and is connected with the collimating assembly 12. This kind of setting for most structures of focusing subassembly 13 all are located the outside of collimation lens seat 11, avoid the structure size of collimation lens seat 11 too big and influence the installation of other structures, improve compactibility.

In this embodiment, the mounting shell 131 includes a first shell portion 1311 and a second shell portion 1312 that are fastened and connected, the first shell portion 1311 is located between the second shell portion 1312 and the collimating lens seat 11, and the focusing driving assembly 132 is mounted on the first shell portion 1311, so that maintenance of the internal structure of the mounting shell 131 can be achieved by dismounting the second shell portion 1312, and convenience in dismounting, maintenance and replacement of the focusing assembly 13 is improved. The first housing portion 1311 and the second housing portion 1312 may be coupled using a screw connection, a snap connection, or other removable connection.

The focusing driving assembly 132 comprises a focusing driving motor 1321, a transmission screw rod 1322, a transmission nut seat 1323 and a connecting piece 136, wherein the transmission screw rod 1322 extends along the Z direction, one end of the transmission screw rod 1322 is rotatably arranged on the mounting shell 131, and the other end of the transmission screw rod is connected with a driving shaft of the focusing driving motor 1321; the drive nut mount 1323 is threaded onto the drive screw 1322 and the connector 136 is connected between the drive nut mount 1323 and the alignment assembly 12. The focusing assembly 13 further includes a guide structure 135, the guide structure 135 being configured to define the drive nut seat 1323 to slide only in the Z direction. Thus, when the focus driving motor 1321 rotates, the driving screw 1322 rotates to drive the driving nut seat 1323 to move along the Z direction, that is, drive the collimation assembly 12 to move along the Z direction.

That is, in the present embodiment, the transmission nut seat 1323 is a moving member of the focus driving assembly 132. In other embodiments, the focusing driving assembly 132 may further use a cylinder or a hydraulic cylinder or other driving structure to drive the moving member to move along the Z direction, so that the moving member drives the collimating assembly 12 to move.

In this embodiment, the guiding structure 135 includes cross roller guide tracks, in which two mutually matched guide tracks are respectively mounted on the inner side wall of the mounting shell 131 and the outer side wall of the driving nut seat 1323, so that the guiding precision is high. The cross roller guide tracks are preferably disposed one on each of opposite sides of the drive nut seat 1323. However, it should be noted that other guiding structures 135 capable of sliding guiding, such as a rail-slider structure, can be applied in the present embodiment, and the present utility model is not limited thereto.

The outer sidewall of the driving nut seat 1323 is provided with an indication scale 1324, and the indication scale 1324 is provided with a plurality of indication scales along the Z direction at intervals. The mounting shell 131 is provided with a visual window 1313, the visual window 1313 is opposite to the indication scale 1324, and at least part of the indication scale 1324 can move to be opposite to the visual window 1313. The indication scale 1324 seen by the user through the visual window 1313 indicates the moving distance of the transmission nut seat 1323 relative to the initial position, so that the user can check the focusing state conveniently, and the operation of the focusing assembly 13 can be further controlled by checking the indication scale 1324, so that the focusing accuracy and convenience are improved. Preferably, the interval between two adjacent indication graduations 1324 is 0.5mm to 1.5mm to improve focusing accuracy.

Further, a perspective mirror 137 is installed in the installation shell 131, the perspective mirror 137 is arranged opposite to the visual window 1313 and covers the visual window 1313, an indication mark is formed on the inner side surface of the perspective mirror 137, and the indication mark is exposed through the visual window 1313. The indication scale 1324 can be aligned with the indication mark, by which alignment of the indication mark with the indication scale 1324 a specific indication scale 1324 is located. The arrangement of the perspective mirror 137 and the indication mark can avoid the influence on processing caused by making the visible window 1313 smaller, and can avoid the entry of magazines such as dust, water vapor and the like into the installation cavity; the indication mark can be set to be more clearly indicated, so that the identification accuracy of the indication scale 1324 is improved, and the adjustment accuracy is improved.

In this embodiment, the indication mark is an indication line, which is parallel to the indication scale 1324. In other embodiments, the indication identifier may be an indication arrow.

The transmission nut seat 1323 all protrudes along the both ends of Z direction and is provided with crashproof structure 133, and crashproof structure 133 can avoid transmission nut seat 1323 to collide with other structures in the motion process along the Z direction, reduces transmission nut seat 1323 by the possibility that the damage is bumped or the bigger problem of vibration takes place in the operation process, improves focusing assembly 13's operation security and stability. In this embodiment, the anti-collision structure 133 is an anti-collision cylinder made of elastic materials such as rubber and silica gel. In other embodiments, the impact structure 133 may also be a hydraulic bumper, a spring, or the like.

To control the limit running stroke of the driving nut seat 1323, two photoelectric switches 134 are disposed in the mounting case 131 at intervals along the Z direction, the photoelectric switch 134 located at the upper side is used for limiting the stroke of the driving nut seat 1323 moving upwards, and the photoelectric switch 134 located at the lower side is used for limiting the stroke of the driving nut seat 1323 moving downwards. The limiting principle of the photoelectric switch 134 is a conventional arrangement in the art, and will not be described in detail.

The collimation mechanism 1 further comprises a shielding plate 16, the shielding plate 16 is detachably connected to the mounting opening to seal the mounting opening, and a sliding groove is formed in the shielding plate 16 along the vertical direction. The connecting piece 136 is in an I-shaped structure, two ends of the I-shaped structure are respectively connected with the sliding sleeve 14 and the transmission nut seat 1323, and the middle part of the I-shaped structure is slidably arranged in the sliding groove in a penetrating manner. Therefore, when the size of the mounting opening is ensured, the whole collimating assembly 12 can conveniently enter and exit the collimating lens seat 11 from the mounting opening, the mounting opening can be shielded when the collimating mechanism 1 is used, and impurities in the focusing assembly 13 are prevented from entering the collimating lens seat 11.

The collimator assembly 12 preferably further includes a collimator barrel 121 and a collimator lens unit 122. The collimator lens barrel 121 is disposed on a collimator lens unit 122, and the collimator lens unit 122 is used for collimating laser light. The collimating lens barrel 121 extends along the Z direction, the collimating lens unit 122 is fixedly installed in the collimating lens barrel 121, and the connecting piece 136 is connected with the outer side wall of the collimating lens barrel 121. The problem of inconvenient connection caused by the connection of the connection member 136 directly with the collimator lens unit 122 can thereby be avoided.

The lower end of the collimating lens barrel 121 extends inwards to form a limiting protrusion 1211, two clamping assemblies 123 are arranged in the collimating lens barrel 121 at intervals along the Z direction, the two clamping assemblies 123 are an upper clamping assembly and a lower clamping assembly respectively, the collimating lens unit 122 is clamped between the upper clamping assembly and the lower clamping assembly, and the lower end of the lower clamping assembly is abutted to the limiting protrusion 1211. Therefore, a connecting structure is not required to be arranged between the collimating mirror unit 122 and the collimating lens barrel 121, the convenience of installing and detaching the collimating mirror unit 122 is improved, and the structure of the collimating mirror unit 122 is prevented from being damaged.

The locking ring 124 is screwed on the inner thread of the upper end of the collimating lens barrel 121, and the locking ring 124 abuts against the upper end of the upper clamping assembly, so that the upper clamping assembly can be pressed downwards by screwing the locking ring 124, so that the upper clamping assembly compresses the collimating lens unit 122 and the lower clamping assembly, and the stability of the inner structure of the collimating lens barrel 121 is ensured.

Each of the clamping assemblies 123 includes a plurality of washers 1231 stacked in the Z direction, so that the positions of the collimator lens units 122 in the collimator lens barrel 121 can be changed by changing the number of washers 1231, thereby improving the convenience of adjustment. More preferably, the gasket 1231 in the upper clamping assembly includes at least one elastic gasket 1231a, and the elastic gasket 1231a can be elastically deformed along the Z direction to provide a proper pressing force to the collimating mirror unit 122, so as to avoid deformation or even damage of the collimating mirror unit 122 caused by excessive downward pressing force of the locking ring 124.

The collimating mechanism 1 further comprises a sliding sleeve 14, and the sliding sleeve 14 is fixedly sleeved on the outer side of the collimating lens barrel 121 and is connected with the connecting piece 136. The provision of the sliding sleeve 14 facilitates the integration of the collimation assembly 12 into a unitary removable module, thereby facilitating the modular arrangement of the collimation assembly 12. Preferably, one end of the sliding sleeve 14 is provided with a flange part in an inward protruding manner, one end of the collimating lens barrel 121 is abutted against the inner side surface of the flange part, and the other end of the collimating lens barrel 121 is in threaded connection with the second end of the sliding sleeve 14, so that when the collimating assembly 12 is installed, the collimating assembly 12 can be inserted into the sliding sleeve 14 through the second end of the sliding sleeve 14, and locking is realized through screwing the collimating lens barrel 121 and the threads of the sliding sleeve 14 until the first end of the collimating lens barrel 121 is abutted against the flange part.

Preferably, an annular avoidance groove is formed on the inner side wall of the sliding sleeve 14, so as to reduce the contact area with the collimating lens barrel 121 and reduce the abrasion of the collimating lens barrel 121 in the process of mounting and dismounting. Further, a sealing ring is arranged between the collimating lens barrel 121 and the sliding sleeve 14, and the sealing ring is positioned between the avoidance groove and the second end of the collimating lens barrel 121.

In order to cool the collimator assembly 12 and avoid the collimator assembly 12 from deforming the collimator lens unit 122 due to too high temperature, the collimator mechanism 1 preferably further includes a collimator cooling assembly 15, and the collimator cooling assembly 15 is disposed outside the collimator lens holder 11 to cool the collimator lens holder 11 through the collimator lens holder 11. The collimating and cooling assembly 15 is preferably disposed on a side of the collimating lens holder 11 remote from the focusing assembly 13 to avoid interference.

As shown in fig. 3 and 5, the collimating and cooling assembly 15 includes a cooling base 151 and a cooling plate 152, a cooling channel 1511 is provided on a side of the cooling base 151 facing the collimating lens barrel 121, and the cooling base 151 has a water inlet and a water outlet communicating with the cooling channel 1511. The cooling plate 152 is hermetically connected to the side of the cooling block 151 facing the collimator lens block 11 and closes the opening of the cooling channel 1511. The cooling plate 152 is attached to the collimator lens holder 11. The collimation cooling assembly 15 further comprises two water inlet and outlet joints 153 arranged at the water inlet and the water outlet, respectively.

The cooling plate 152 is preferably made of a heat conductive metal to further improve heat conduction efficiency. The cooling channel 1511 is preferably bent to have a serpentine structure, and both ends of the serpentine structure are provided with a water inlet and a water outlet, so that the length of the cooling channel 1511 is increased on the basis of unchanged size of the cooling seat 151, thereby prolonging the waterway path and improving the heat conduction efficiency.

The mounting groove has been seted up in the outside of collimating mirror seat 11, and cooling plate 152 and cooling seat 151 are all installed in the mounting groove, and cooling plate 152 laminating in the tank bottom of mounting groove to better dispel the heat to collimating mirror seat 11. The setting of mounting groove provides the installation location for collimation cooling unit 15 on the one hand, and on the other hand can shorten the interval between cooling plate 152 and the collimating mirror seat 11 inside wall, improves the heat conduction efficiency to the collimating mirror seat 11 inside to improve cooling efficiency. The mounting groove is preferably a stepped groove with the lower end facing the interior of the collimating lens barrel 121, the shape of the cooling seat 151 is matched with that of the stepped groove, and the cooling seat 151 is fastened with the bottom of the stepped groove through screws.

The collimator lens unit 122 includes a lenticular lens sheet 1221 and a meniscus lens sheet 1222 stacked in the Z direction, and the concave surface of the meniscus lens sheet 1222 is attached to the convex surface of one side of the lenticular lens sheet 1221.

In this embodiment, to better achieve the automaticity of focusing, the laser welding head has a controller and a focus detection device, the focus detection device is used to detect the focus position during welding, the focus detection device and the focus driving assembly 132 are all connected with the controller in communication, and the controller controls the operation of the focus driving assembly 132 according to the focus position. Therefore, in the welding process, the focus can be detected in real time by the focus detection device, so that the focus adjustment driving assembly 132 is controlled in real time, automatic focusing is realized, different requirements on the focus in the welding process are met, and the welding quality is improved.

As shown in fig. 2, because the laser energy is higher, in order to avoid overheating damage of the optical fiber rod and in order to avoid a great deal of heat from being transmitted downwards to the collimating mechanism 1, an optical fiber cooling assembly 4 is further connected between the collimating mechanism 1 and the connector assembly 3, and the optical fiber cooling assembly 4 is used for taking away the heat transmitted by the optical fiber rod, so that the operation influence of the heat on the collimating mechanism 1 is reduced, and the operation safety and reliability of the laser welding connector are improved.

As shown in fig. 2, 6 and 7, the optical fiber cooling assembly 4 is preferably cooled in the form of water cooling, which includes a water cooling block 41, a water inlet joint 42 and a water outlet joint 43. The two ends of the water cooling seat 41 are respectively in sealing connection with the joint assembly 3 and the collimating lens seat 11, a water cooling channel 414 is arranged on the water cooling seat 41 in a surrounding mode, the water inlet joint 42 and the water outlet joint 43 are respectively communicated with the water cooling channel 414, wherein the water inlet joint 42 is used for providing cold water for the water cooling channel 414, and the water outlet joint 43 is used for leading out water in the water cooling channel 414 to flow out so as to promote the circulation of the water in the water cooling channel 414 and further take away heat.

The water cooling seat 41 comprises an inner seat body 412 and an outer seat body 411 sleeved on the outer side of the inner seat body 412, the inner seat body 412 and the outer seat body 411 are both in cylindrical structures with two open ends, and the inner cavity of the inner seat body 412 is directly communicated with the emission light cavity 31 and the collimation light cavity 111 respectively. The water cooling passage 414 is formed around the inner wall of the outer housing 411 and the outer wall of the inner housing 412, the lower end of the inner housing 412 has a mounting plate portion 4121 extending radially outward, the lower end of the outer housing 411 abuts against the mounting plate portion 4121, and a seal ring is provided between the lower end of the outer housing 411 and the mounting plate portion 4121. The mounting plate portion 4121 is detachably connected to the collimator lens holder 11.

Further, the outer side wall of the upper end of the inner seat 412 is provided with an external thread, the water cooling seat 41 further comprises a locking seat 413 screwed on the outer side of the outer seat 411, the lower end of the locking seat 413 is pressed against the upper end of the outer seat 411 to compress the outer seat 411 between the locking seat 413 and the mounting plate 4121, so that the outer seat 411 is not connected with the inner seat 412 by adopting other connection structures, and the convenience in dismounting of the water cooling seat 41 is improved. A sealing ring is also provided between the upper end of the outer housing 411 and the upper end of the locking seat 413.

As shown in fig. 2 and 8, in order to protect the collimator lens unit 122, a collimator protection assembly 5 is further disposed between the collimator assembly 12 and the optical fiber cooling assembly 4, and the collimator protection assembly 5 includes a fixed lens seat 51 and a protection lens assembly 52. The fixed lens seat 51 is connected between the optical fiber cooling assembly 4 and the collimating lens seat 11, the fixed lens seat 51 is provided with a protection cavity which is directly opposite to and communicated with the collimating optical cavity 111, and one side of the fixed lens seat 51 is provided with a drawing port; the protection mirror assembly 52 is installed in the protection cavity and is used for enabling laser to vertically pass through, and the protection mirror assembly 52 can pass in and out of the protection cavity through the drawing port. The collimation protection component 5 is structurally arranged, so that impurities such as dust, water vapor and the like can be prevented from entering the collimation optical cavity 111, and the collimation lens unit 122 is protected; meanwhile, the drawable design of the protective mirror assembly 52 can improve the convenience of installation, maintenance and cleaning of the protective mirror assembly 52.

The fixed lens seat 51 is internally provided with an annular supporting ring 5111 in a protruding mode, the protective lens assembly 52 is installed on the supporting ring 5111, and the supporting surface of the supporting ring 5111 is flush with the lower side wall of the drawing opening. Further, the fixed lens seat 51 includes a protection base 511 and a protection upper cover 512 detachably fastened to the upper end of the protection base 511, the protection base 511 is provided with the support ring 5111, and the protection upper cover 512 is detachably connected to the water cooling seat 41. The protection mirror assembly 52 is clamped between the protection upper cover 512 and the support ring 5111, so as to prevent the protection mirror assembly 52 from moving in the Z direction inside the fixed mirror base 51, and improve the installation reliability of the protection mirror assembly 52. A sealing ring is provided at the fastening surface of the protection base 511 and the protection upper cover 512.

The protection lens assembly 52 includes a protection lens seat 522 and a protection lens 521 mounted inside the protection lens seat 522, two ends of the protection lens seat 522 are respectively abutted with the support ring 5111 and the protection upper cover 512, and one side of the protection lens seat 522 extends out of the fixed lens seat 51 through a drawing opening, so that a user can conveniently draw the protection lens assembly 52 through the structure of the extending part of the protection lens seat 522.

The protective lens assembly 52 further includes an elastic supporting member 523 and an elastic pressing member 524, where the elastic supporting member 523 and the elastic pressing member 524 are both in an annular structure and fixedly disposed inside the protective lens seat 522, and the protective lens 521 is sandwiched between the elastic supporting member 523 and the elastic pressing member 524. The elastic supporting member 523 and the elastic pressing member 524 are used for pressing the protective lens 521 to prevent the protective lens 521 from shaking inside the protective lens seat 522.

Preferably, the elastic pressing member 524 includes a main pressing portion disposed on the upper side of the protective lens 521 and having an annular shape, and a lateral pressing portion extending downward from an outer sidewall of the main pressing portion presses the upper side of the protective lens 521, and the lateral pressing portion extends between the outer side of the protective lens 521 and an inner sidewall of the protective lens seat 522 to fill a gap between the protective lens 521 and the protective lens seat 522, so as to prevent the protective lens 521 from shaking along the Z direction and a direction perpendicular to the Z direction, and effectively ensure the setting stability of the protective lens 521 in the protective lens seat 522.

Further, a sealing ring groove is formed at the upper end of the elastic pressing member 524, a sliding sealing member 525 is installed in the sealing ring groove, and the sliding sealing member 525 protrudes out of the upper end surface of the elastic pressing member 524 and abuts against the inner side surface of the upper protection cover 512. The sliding seal 525 can realize sliding seal between the elastic pressing piece 524 and the protective upper cover 512, and meanwhile, avoid abrasion of the elastic pressing piece 524 in the drawing process of the protective mirror assembly 52, and prolong the service life of the protective mirror assembly 52.

The collimation protection component 5 further comprises a drawing component 53, wherein the drawing component 53 is detachably arranged on the outer side of the fixed lens seat 51 and is connected with the fixed lens seat 51, so that the protection lens component 52 can be drawn out directly by pulling the drawing component 53, and convenience of drawing operation is improved.

Further, a locking knob 54 is provided on the drawing member 53, the locking knob 54 includes a knob portion and a connecting rod portion connected to each other, the knob portion is located at the outer side of the drawing member 53, an external thread is provided at the end of the connecting rod portion, and the connecting rod portion passes through the drawing member 53 and is screwed to the fixed lens seat 51 at the end thread.

As shown in fig. 1 and 2, the reflecting assembly 6 includes a reflecting mirror mount 61 and a beam splitter 62, and the reflecting mirror mount 61 is connected between the collimating mirror mount 11 and the galvanometer assembly 2. The reflecting mirror seat 61 has an incident light cavity extending along the Z direction and a reflecting light cavity extending along the X direction, the incident light cavity is in opposite communication with the collimating light cavity 111, the reflecting light cavity is in communication with the inner cavity of the galvanometer assembly 2, and the spectroscope 62 is disposed at the communication between the incident light cavity and the reflecting light cavity to reflect the collimated light to the inner cavity of the galvanometer assembly 2, so as to change the propagation direction of the laser.

As shown in fig. 1 and 2, the laser welding joint further includes a visual inspection assembly 7, and the visual inspection assembly 7 is mounted on a side of the mirror base 61 away from the galvanometer assembly 2. The vision detecting component 7 comprises a camera 71 and a reflector mounting seat 73, wherein the reflector mounting seat 73 is arranged in an L shape, one end of the reflector mounting seat 73 is connected with the reflector seat 61, the other end of the reflector mounting seat 73 is connected with the camera 71, the reflector mounting seat 73 is provided with an L-shaped detecting light cavity 731, one end of the detecting light cavity 731 is communicated with the reflecting light cavity, and the other end of the detecting light cavity 731 extends upwards to penetrate the vision detecting component 7. A detection light mirror 72 is provided at a corner of the detection light cavity 731. The beam splitter 62 and the detection light mirror 72 are each disposed at an angle of 45 ° to the XY plane, and the axis of the incident light cavity and the axis of the reflected light cavity are each at an angle of 45 ° to the beam splitter 62.

During welding, a blue light source with the wavelength of 470 nanometers is arranged on the outer side of the laser welding head, the blue light source irradiates on a welding seam, the welding seam reflects a part of blue light upwards to enter the laser welding head, then enters the detection light cavity 731, and the detection light entering the detection light cavity 731 is reflected to the position of the camera 71 through the detection light reflector 72 to form a vertically upward light source, so that the camera 71 can shoot a welding position in real time, and welding positioning, welding seam tracking and observation are realized.

The specific structure of the reflecting component 6 and the visual detecting component 7 can refer to the prior art, which is not the focus of the present utility model and will not be described again.

As shown in fig. 2, 9 and 10, the galvanometer assembly 2 includes a galvanometer mount 21, a first galvanometer assembly 22 and a second galvanometer assembly 23, and the galvanometer mount 21 has a galvanometer optical cavity 213, one side of which in the X direction is connected to an outgoing light end of the mirror mount 61, and the lower side thereof is connected to a light incident end of the focusing assembly 8. The galvanometer mount 21 has an optical inlet 2121 communicating with the galvanometer optical cavity 213 and the reflective optical cavity, and an optical outlet 2122 communicating with the galvanometer optical cavity 213 and the inner cavity of the focusing assembly 8.

The first galvanometer assembly 22 includes a first galvanometer 221 and a first driving unit 222, the first driving unit 222 drives the first galvanometer 221 to swing around a first preset axis, the second galvanometer assembly 23 includes a second galvanometer 231 and a second driving unit 232, and the second driving unit 232 is used for driving the second galvanometer 231 to swing around a second preset axis, the first preset axis is a preset angle along an X direction or relative to the X direction, and the second preset axis extends along a Y direction. The first vibrating plate 221 is used for reflecting the parallel light beam reflected by the reflecting component 6 to the second vibrating plate 231, and the second vibrating plate 231 is used for reflecting the light reflected by the first vibrating plate 221 into a vertical light beam which vertically propagates downwards.

Through setting up first mirror subassembly 22 and second mirror subassembly 23 shakes for the final focused facula of coming out of laser welding head can walk the orbit of different figures and width, thereby realizes the welding of irregular welding seam or great clearance welding seam, improves welding suitability, improves welding quality.

The vibrating mirror seat 21 is provided with a containing cavity 214 and a vibrating mirror optical cavity 213 which are arranged in an up-down separation mode, and the first vibrating mirror 221 and the second vibrating mirror 231 are positioned in the vibrating mirror optical cavity 213; the first driving unit 222 is installed in the accommodating cavity 214 and is used for driving the first vibrating piece 221 to swing; the second driving unit 232 is mounted in the accommodating cavity 214 and is used for driving the second vibrating plate 231 to swing. Thereby, the influence of the first driving unit 222 and the second driving unit 232 on the reflection of the light beam can be avoided, and the rationality of the space layout can be improved.

The vibrating mirror seat 21 comprises an upper mirror seat 211 and a lower mirror seat 212 which are connected in an up-down buckling manner, so that the disassembly and assembly convenience of the internal structure of the vibrating mirror seat 21 is improved. The bottom of the lower lens base 212 is provided with the light outlet 2122, and one side of the lower lens base 212 is provided with the light inlet 2121. The buckling part of the lower lens seat 212 and the upper lens seat 211 is provided with a sealing ring so as to seal the vibrating lens optical cavity 213. The lower lens base 212 is internally provided with a vibrating lens optical cavity 213, and the top end of the lower lens base 212 and the upper lens base 212 are surrounded to form the accommodating cavity 214, so that the structure in the interior of the vibrating lens base 21 can be conveniently installed, maintained and replaced by disassembling the upper lens base 211.

The upper lens holder 211 and the lower lens holder 212 are preferably of a hexahedral structure with a shape adapted to facilitate docking with the focusing assembly 8 and the reflecting assembly 6. The mirror mount 61 is attached to one side surface of the vibrating mirror mount 21, and the focusing assembly 8 is attached to the lower side surface of the vibrating mirror mount 21. The upper and lower lens holders 211, 212 are preferably, but not limited to, screwed.

The galvanometer assembly 2 also includes a control assembly 24, the control assembly 24 for controlling operation of the first drive unit 222 and the second drive unit 232. The control assembly 24 is preferably mounted to the bottom of the receiving cavity 214 and is in communication with the first drive unit 222 and the second drive unit 232.

The control assembly 24 includes a first driving board 241, a second driving board 242 and a DA board 243, where the DA board 243 is communicatively connected to the first driving board 241 and the second driving board 242, and the first driving board 241 is in driving connection with the first driving unit 222 to control the first driving unit 222 to operate; the second drive plate 242 is communicatively coupled to the second drive unit 232 to control operation of the second drive unit 232. The DA board 243 is used for collecting data information of the first driving board 241 and the second driving board 242. The first driving plate 241 and the second driving plate 242 are preferably perpendicular to the upper end surface of the lower lens holder 212, so as to improve heat dissipation performance of the first driving plate 241 and the second driving plate 242. The first driving plate 241 and the second driving plate 242 are preferably arranged vertically to ensure a gap between the first driving plate 241 and the second driving plate 242.

To dissipate heat from the galvanometer assembly 2, the galvanometer assembly 2 further includes a galvanometer cooling assembly 25, the galvanometer cooling assembly 25 being mounted at the bottom of the receiving chamber 214 and coupled to the control assembly 24. Therefore, the vibrating mirror cooling assembly 25 can cool the vibrating mirror seat 21 and the control assembly 24 simultaneously, the vibrating mirror optical cavity 213 is cooled, the internal temperature of the accommodating cavity 214 is ensured to be in a proper range, and smooth operation of the control assembly 24 is ensured.

Further, the galvanometer cooling component 25 is perpendicular to the Z direction, and the galvanometer cooling component 25 is sandwiched between the lower lens base 212 and the control component 24, so as to increase the contact area between the galvanometer cooling component 25 and the lower lens base 212, and improve the cooling effect. The lower ends of the first driving plate 241 and the second driving plate 242 are connected with the galvanometer cooling assembly 25, and the DA board card 243 is opposite to and spaced from the galvanometer cooling assembly 25. The galvanometer cooling component 25 cools the galvanometer seat 21 and the control component 24 by adopting a water cooling mode. The structure of the galvanometer cooling assembly 25 may refer to the structure of the collimating cooling assembly 15, and will not be described again.

As shown in fig. 1 and 2, the focusing assembly 8 includes a focusing lens holder 81 and a focusing lens 82, the focusing lens holder 81 having a focusing optical cavity 811 penetrating in the Z direction, the upper end of the focusing optical cavity 811 being abutted with the light outlet 2122 so that the laser light reflected by the galvanometer assembly 2 can propagate vertically inside the focusing optical cavity 811. The focusing lens 82 is used to focus the light beam emitted from the vibrating lens so that the light beam is focused to form a focal point onto the welding material. The specific structure of the focusing assembly 8 can refer to the prior art, which is not the focus of the present utility model and will not be described in detail.

As shown in fig. 1 and 2, the laser welding head further comprises an air knife assembly 9, and the air knife assembly 9 is used for cleaning welding points so as to prevent welding slag from remaining at the welding points to affect welding, and ensure welding quality. Specifically, the air knife assembly 9 comprises a mounting frame 92, a sliding rod 93 and an air knife 91, wherein the upper end of the mounting frame 92 is connected with one side of the vibration separating mirror seat 21 away from the reflecting assembly 6, the upper end of the sliding rod 93 is connected with the mounting frame 92, and the sliding rod 93 extends along the vertical direction.

As shown in fig. 11 and 12, the air knife 91 has an air cavity 913 and a plurality of air outlets 916, the plurality of air outlets 916 being disposed at intervals along the length direction of the air knife 91, and each air outlet 916 being in communication with the air cavity 913. The air knife assembly 9 preferably includes an air supply unit for providing an air supply to the air cavity 913. By providing the plurality of air outlets 916, air outlet pressurization can be realized when the air pressure provided by the air supply unit is unchanged, and the purging capability is improved.

In this embodiment, the air knife 91 has an air outlet channel, the air outlet channel extends along the length direction of the air knife 91 and is communicated with the air cavity 913, one of the upper channel wall and the lower channel wall of the air outlet channel is convexly provided with a plurality of protrusions 915, the protrusions 915 are abutted with the other of the upper channel wall and the lower channel wall, the plurality of protrusions 915 are arranged at intervals along the length direction of the air knife 91, and an air outlet 916 is formed between two adjacent protrusions 915. This kind of setting can simplify the processing of air knife 91, avoids setting up other structures in air knife 91 inside, reduces the processing degree of difficulty of air knife 91.

Further, the air knife 91 includes an upper knife holder 911 and a lower knife holder 912 that are detachably connected, and the upper knife holder 911 and the lower knife holder 912 surround to form the air cavity 913 and the air outlet channel. In the present embodiment, the upper surface of the lower blade holder 912 is provided with the protrusion 915, and in other embodiments, the lower surface of the upper blade holder 911 may be provided with the protrusion 915.

Further, the width of the air outlet 916 gradually decreases along the direction away from the air cavity 913, so as to further achieve the effect of air outlet pressurization and enhance the wind power. That is, the width of the projection 915 gradually increases in a direction away from the air cavity 913. Preferably, the height of the air outlet channel is 0.5 mm-1.5 mm so as to enhance the air outlet wind power.

More preferably, the air outlet side of the upper blade holder 911 extends forward to the air outlet side of the lower seat, and the part of the upper blade holder 911 extending out of the air outlet channel forms a stop part for stopping the air flow flowing out from the air outlet 916 to flow upwards, so that the air outlet flows downwards to the welding position, and the purging effect on magazines such as welding slag is improved. The lower surface of the stop portion extends obliquely downwards along a direction away from the air outlet channel to form a guide surface 9111 so as to further guide the flow of the air outlet and guide the air outlet to flow downwards.

The upper groove is formed in the lower surface of the upper tool holder 911, the lower groove is formed in the lower surface of the lower tool holder 912 in a concave mode, and after the upper tool holder 911 and the lower tool holder 912 are buckled, the upper groove and the lower groove are matched to form the air cavity 913, so that the depth of the air cavity 913 can be enhanced, and the volume of the air cavity 913 can be enhanced. The lower knife holder 912 is provided with an air inlet 914 communicated with the air cavity 913, and the air inlet 914 is used for being connected with an air supply unit. The air inlets 914 are preferably spaced apart at least two along the length of the air knife 91.

Further, a sealing member is arranged between the upper tool holder 911 and the lower tool holder 912, the sealing member is arranged in a U shape and is enclosed outside the air cavity 913, and the opening of the U shape faces the air outlet channel, so that the other sides of the air cavity 913 can be sealed, the air only flows to the air outlet channel, and the air tightness of the air knife 91 is improved. In this embodiment, a U-shaped seal groove is formed on the upper surface of the lower blade holder 912, and the seal member is disposed in the seal groove.

Further, the air knife 91 can be slidably arranged on the sliding rod 93 along the sliding rod 93, so as to adjust the height of the air knife 91, and purge welding slag is better realized. More preferably, at least two air knives 91 are arranged at intervals along the length direction of the sliding rod 93 so as to enhance the blowing wind force and effectively prevent the welding slag from splashing to damage the focusing lens 82.

The air knife 91 is connected to the slide bar 93 through the connecting block 94, the connecting block 94 comprises a main connecting portion and two clamping portions connected to the main connecting portion, the two clamping portions are oppositely arranged, each clamping portion is provided with a clamping groove, the two clamping grooves are matched to form a clamping hole, and the slide bar 93 penetrates through the clamping hole. And each clamping part is also provided with a locking hole, the two locking holes are opposite to each other, and the locking screw member passes through the two locking holes to lock the two clamping parts. That is, when the locking screw is locked Kong Songtuo, the two clamping parts can be opened relatively, and the connecting block 94 can slide along the sliding rod 93; when the locking screw locks the two clamping parts, the slide bar 93 is clamped by the two clamping parts, and the air knife 91 is fixed relative to the slide bar 93.

Note that the above is only a preferred embodiment of the present utility model and the technical principle applied. It will be understood by those skilled in the art that the present utility model is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the utility model. Therefore, while the utility model has been described in connection with the above embodiments, the utility model is not limited to the embodiments, but may be embodied in many other equivalent forms without departing from the spirit or scope of the utility model, which is set forth in the following claims.

Claims (12)

1. Laser welding head, its characterized in that includes:

the upper end of the joint component (3) is used for being in butt joint with the laser generator;

the collimating mechanism (1) comprises a collimating lens seat (11), a collimating component (12) and a focusing component (13), wherein the upper end of the collimating lens seat (11) is connected with the lower end of the joint component (3) and is provided with a collimating optical cavity (111) penetrating in the vertical direction, the collimating component (12) is arranged in the collimating optical cavity (111) in a sliding manner and is used for collimating laser emitted by the laser generator into parallel beams, and the focusing component (13) is arranged on the outer side of the collimating lens seat (11) and is used for driving the collimating component (12) to move in the vertical direction;

the reflecting component (6) is connected to the lower end of the collimating lens seat (11) and is used for changing the propagation direction of the parallel light beams;

the vibrating mirror assembly (2) is connected to the light emitting side of the reflecting assembly (6), and the vibrating mirror assembly (2) comprises a vibrating mirror plate which can swing around a set axis and convert the light beam reflected by the reflecting assembly (6) into a vertical light beam;

and the focusing assembly (8) is arranged at the lower side of the galvanometer assembly (2) and is used for focusing the vertical light beam.

2. The laser welding head according to claim 1, characterized in that the focusing assembly (13) comprises:

A mounting case (131) mounted on the outer side of the collimator lens mount (11);

the focusing driving assembly (132) is arranged in the mounting shell (131), a mounting opening is formed in one side, facing the focusing assembly (13), of the collimating lens seat (11), and the driving end of the focusing driving assembly (132) extends into the mounting opening and is connected with the collimating assembly (12).

3. The laser welding head according to claim 2, wherein the mounting housing (131) comprises a first housing portion (1311) and a second housing portion (1312) that are detachably snap-fit, the first housing portion (1311) being located between the second housing portion (1312) and the collimating lens mount (11), the focusing drive assembly (132) being mounted to the first housing portion (1311);

and/or the focusing driving assembly (132) is provided with a moving part moving along the vertical direction, an outer side wall of the moving part is provided with indication scales (1324), and a plurality of indication scales (1324) are arranged at intervals along the vertical direction; a visual window (1313) is arranged on one side of the mounting shell (131), and the visual window (1313) is opposite to the indication scale (1324).

4. A laser welding head according to claim 3, characterized in that the mounting shell (131) is fitted with a perspective mirror (137), the perspective mirror (137) covering the visual window (1313), the perspective mirror (137) being provided with an indication mark, which is exposed through the visual window (1313), at least part of the indication scale (1324) being movable into alignment with the indication mark;

And/or the interval between two adjacent indication graduations (1324) is 0.5 mm-1.5 mm.

5. The laser welding head according to claim 2, characterized in that the laser welding head has a controller and a focus detection device for detecting a focus position at the time of welding, the focus detection device and the focus drive assembly (132) being connected in communication with the controller, the controller controlling the operation of the focus drive assembly (132) in accordance with the focus position.

6. The laser welding head according to any of claims 1-5, characterized in that the laser welding head further comprises a collimation protection assembly (5), the collimation protection assembly (5) comprising:

the fixed lens seat (51) is connected between the joint assembly (3) and the collimating lens seat (11), the fixed lens seat (51) is provided with a protection cavity which is directly opposite to and communicated with the collimating optical cavity (111), and one side of the fixed lens seat (51) is provided with a drawing port;

and the protective mirror assembly (52) is arranged in the protective cavity and is used for enabling the laser to vertically pass through, and the protective mirror assembly (52) can pass in and out of the protective cavity through the drawing port.

7. The laser welding head according to any one of claims 1-5, characterized in that the vibrating plate has two vibrating plates, a first vibrating plate (221) and a second vibrating plate (231), respectively, the first vibrating plate (221) being swingable about a first preset axis, the second vibrating plate (231) being swingable about a second preset axis, the first vibrating plate (221) being adapted to reflect the light beam reflected by the reflecting assembly (6) to the second vibrating plate (231), the second vibrating plate (231) being adapted to convert the received light beam into the vertical light beam, the first preset axis being arranged in an X-direction or at a preset angle with respect to the X-direction, the second preset axis extending in a Y-direction, the X-direction, the Y-direction and the vertical direction being mutually perpendicular.

8. The laser welding head according to claim 7, wherein the galvanometer assembly (2) further comprises:

the light incident side of the vibrating mirror seat (21) is connected with the reflecting component (6), the light emergent side of the vibrating mirror seat is connected with the focusing component (8), the vibrating mirror seat (21) is provided with a containing cavity (214) and a vibrating mirror light cavity (213) which are arranged in an up-down separated mode, and the first vibrating mirror (221) and the second vibrating mirror (231) are positioned in the vibrating mirror light cavity (213);

a first driving unit (222) mounted to the accommodating chamber (214) and configured to drive the first vibrating plate (221) to swing;

a second driving unit (232) mounted to the accommodating chamber (214) and configured to drive the second vibrating plate (231) to swing;

the control assembly (24) is arranged in the accommodating cavity (214) and is in communication connection with the first driving unit (222) and the second driving unit (232);

and the vibrating mirror cooling assembly (25) is arranged at the bottom of the accommodating cavity (214) and is connected with the control assembly (24).

9. The laser welding head according to any one of claims 1-5, characterized in that the laser welding head further comprises an air knife assembly (9), the air knife assembly (9) comprising:

the mounting frame (92) is mounted on the outer side of the vibrating mirror assembly (2);

The air knife (91) is arranged on the mounting frame (92), the air knife (91) is provided with an air cavity and a plurality of air outlets (916), the air outlets (916) are arranged at intervals along the length direction of the air knife (91), and each air outlet (916) is communicated with the air cavity (913);

and the air supply unit is used for providing an air source for the air cavity.

10. The laser welding head according to claim 9, wherein the air knife (91) has an air outlet channel extending in a length direction of the air knife (91) and communicating with the air cavity (913), one of an upper channel wall and a lower channel wall of the air outlet channel being convexly provided with a plurality of protrusions (915), the protrusions (915) abutting against the other one of the upper channel wall and the lower channel wall, a plurality of the protrusions (915) being disposed at intervals in the length direction of the air knife (91), and the air outlet (916) being formed between two adjacent protrusions (915).

11. The laser welding head according to any one of claims 1-5, characterized in that the laser welding head further comprises an air knife assembly (9), the air knife assembly (9) comprising:

the sliding rod (93) extends along the vertical direction, and the upper end of the sliding rod is connected to the outer side of the vibrating mirror assembly (2);

The air knives (91) are sleeved on the sliding rods (93) in a sliding mode, and the air knives (91) are provided with at least two air knives at intervals along the vertical direction.

12. Laser welding apparatus, characterized by comprising a laser welding head according to any of claims 1-11.