CN212858238U - Laser welding suction nozzle and laser welding gun - Google Patents

Abstract

The utility model discloses a laser welding suction nozzle and laser welder, this laser welding suction nozzle includes: an installation section; a depending section integrally joined to the mounting section at one of the ends of the mounting section and extending downwardly therefrom; and an extension section mounted to a bottom of the depending section; the periphery of the extension section at least partially protrudes out of the outer side of the suspension section to form an outer protruding part, a light transmission hole penetrating through the upper surface and the lower surface of the outer protruding part is formed in the outer protruding part, and the light transmission hole is opened on the outer side of the light transmission hole so as to divide the outer protruding part into a suction block and a pressing block. According to the utility model discloses, it does not need additionally to reserve laser on the side of suction nozzle and dodges the station with the light trap on the suction nozzle for the horizontal installation space of suction nozzle is kept enough for a short time, and the laser beam can be penetrated into from the work piece directly over through the light trap, has reduced because the laser beam energy dissipation that the laser light path leads to by the deliberate extension has improved welding efficiency and welding quality.

Description

Laser welding suction nozzle and laser welding gun

Technical Field

The utility model relates to a laser welding field, in particular to laser welding suction nozzle and laser welder.

Background

In the field of laser welding, it is known to use welding suction nozzles of different structures to suck and position a workpiece. At the research and the in-process of realizing treating the stable absorption and the location of welding workpiece, utility model people discover that the laser welding suction nozzle among the prior art has following problem at least:

the existing laser welding suction nozzle can stably position a workpiece in order to guarantee stable suction in the welding process, the number of related auxiliary parts is large, and the whole size of the suction nozzle is large, so that large interference is caused to a laser light path in the laser welding process, and the problem is particularly obvious when fine parts are welded.

In view of the above, it is necessary to develop a laser welding nozzle and a laser welding gun to solve the above problems.

SUMMERY OF THE UTILITY MODEL

The weak point that exists among the prior art, the utility model mainly aims at, a laser welding suction nozzle and laser welder are provided, it does not need additionally to reserve laser on the suction nozzle at the side of suction nozzle with the light trap and dodges the station, this one side makes the horizontal installation space of suction nozzle kept enough little, the laser beam can be penetrated into from the work piece directly over through the light trap, reduced because the laser beam energy dissipation that the laser light path leads to by the extension of carelessness, welding efficiency and welding quality have been improved, on the other hand, the setting of light trap can reduce the interference influence that spare part led to the fact the laser light path, welding efficiency and welding quality have further been improved, finally, the setting of light trap can play certain effect of blockking to the high temperature welding bits that the welding in-process produced, prevent that the welding bits from splashing and lead to the fact the destruction to the work piece.

In order to realize the above object and other advantages according to the present invention, there is provided a laser welding nozzle, including:

an installation section;

a depending section integrally joined to the mounting section at one of the ends of the mounting section and extending downwardly therefrom; and

an extension section mounted to a bottom of the depending section;

the periphery of the extension section at least partially protrudes out of the outer side of the suspension section to form an outer protruding part, a light transmission hole penetrating through the upper surface and the lower surface of the outer protruding part is formed in the outer protruding part, and the light transmission hole is opened on the outer side of the light transmission hole so as to divide the outer protruding part into a suction block and a pressing block.

Optionally, at least a portion of the side wall of the light-transmitting hole extends upward from the bottom to form a taper shape, so that the inner diameter of the light-transmitting hole is gradually expanded along the direction from bottom to top.

Optionally, the bottom of the suction block is provided with a suction hole, and the inside of the laser welding suction nozzle is provided with a suction gas path extending to the suction hole.

Optionally, the suction gas path includes a first gas path, a second gas path and a third gas path respectively extending inside the mounting section, the suspending section and the extending section, wherein the second gas path is respectively communicated with the first gas path and the third gas path, and the third gas path is communicated with the suction hole.

Optionally, the extending direction of the first air path is consistent with the length direction of the mounting section;

the first air path extends outwards from the inside of the mounting section until a first machining hole is formed in the side face of the mounting section; the second air passage extends outwards from the inner part of the suspension section until a second machining hole is formed on the side surface of the mounting section or the suspension section.

Optionally, a vacuum generating hole leading to the first air path is further formed in the side surface of the mounting section.

Optionally, the bottom of the suction block is provided with an elastic body covering the periphery of the suction hole, and the elastic body is provided with a suction port communicated with the suction hole.

Optionally, the elastic body is made of a thermoplastic elastic material, and the elastic body is fixed to the bottom of the suction block in a two-color injection molding manner; the mounting section, the suspending section and the extending section are made of beryllium copper or ceramic materials; and diamond-like carbon film layers are plated on the surface layers of the mounting section, the suspension section and the extension section.

Optionally, at least one feature positioning block is arranged at the bottom edge of the light hole, and the bottoms of the feature positioning block, the pressing block and the elastic body are all located on the same horizontal plane.

Optionally, the mounting section is integrally formed with a mounting positioning strip protruding from a side surface thereof, and an extending direction of the mounting positioning strip is consistent with a length direction of the mounting section.

Further, the utility model also discloses a laser welder, its characterized in that, it includes above-mentioned arbitrary laser welding suction nozzle.

One of the above technical solutions has the following advantages or beneficial effects: because it does not need to reserve laser additionally on the side of suction nozzle on seting up the light trap and dodges the station, this one side makes the horizontal installation space of suction nozzle kept enough little, the laser beam can be penetrated into from the work piece directly over through the light trap, reduced because the laser beam energy dissipation that the laser light path leads to by the deliberate extension, welding efficiency and welding quality have been improved, on the other hand, the setting of light trap can reduce the interference influence that spare part caused to the laser light path, welding efficiency and welding quality have further been improved, finally, the setting of light trap can play certain barrier effect to the high temperature welding bits that welding in-process produced, prevent that the welding bits from splashing and causing the destruction to the work piece.

Another technical scheme in the above technical scheme has the following advantages or beneficial effects: because the internal diameter of light trap is the gradual expansion potential along from the orientation up down for when the laser beam penetrated from the top of light trap, further reduced the interference influence that the inner wall of light trap led to the fact the laser beam, be convenient for simultaneously operating personnel or visual detection system track, control in real time to the welding area on the work piece.

Another technical scheme in the above technical scheme has the following advantages or beneficial effects: because the suction nozzle is provided with the built-in suction gas circuit, and the suction gas circuit is arranged into three sections according to the extending path of the suction gas circuit, the problem that the traditional external gas circuit interferes with laser beams is avoided, and the problems that the traditional built-in gas circuit is difficult to process and high in production and manufacturing cost are also avoided.

Another technical scheme in the above technical scheme has the following advantages or beneficial effects: because the periphery of the suction hole is covered with the elastomer made of the thermoplastic elastic material, the contact friction force between the suction nozzle and the workpiece is improved, the preset suction area on the workpiece is conveniently and accurately sucked, the probability of vacuum breaking of the suction nozzle in the suction process is reduced, and the workpiece is prevented from being scratched by the suction nozzle in the suction process.

Another technical scheme in the above technical scheme has the following advantages or beneficial effects: because the suction nozzle is made of beryllium copper or ceramic materials, and meanwhile, the surface layer of the suction nozzle is plated with the diamond-like carbon film layer, the capability of the suction nozzle for bearing laser erosion is greatly improved, and the service life of the suction nozzle is prolonged.

Another technical scheme in the above technical scheme has the following advantages or beneficial effects: because the elastomer adopts the mode of double-colored injection moulding to fix to absorb the bottom of piece, the elastomer uses the back that appears wearing and tearing through a period, in order not to influence and absorb the precision, can realize the change to the elastomer through the mode of the new elastomer of secondary injection moulding after peeling off the elastomer of wearing and tearing, not only makes the maintenance of suction nozzle more economical, and the difference in performance can not appear in the elastomer after the change moreover, and this undoubtedly helps improving welding quality.

Drawings

In order to illustrate the technical solutions of the embodiments of the present invention more clearly, the drawings of the embodiments will be briefly described below, and it is obvious that the drawings in the following description only relate to some embodiments of the present invention, and are not intended to limit the present invention, wherein:

fig. 1 is a perspective view of a laser welding nozzle according to an embodiment of the present invention, wherein the external convex portion is partially enlarged;

fig. 2 is a perspective view of a proposed laser welding nozzle at another viewing angle according to an embodiment of the present invention, in which a bottom three-dimensional structure of the laser welding nozzle can be seen;

fig. 3 is a perspective view of a laser welding nozzle according to an embodiment of the present invention, in which an extended path of a suction gas path inside the laser welding nozzle is shown in a dotted line;

fig. 4 is a left side view of a laser welding nozzle according to an embodiment of the present invention, in which an extended path of a suction gas path inside the laser welding nozzle is shown by a dotted line;

fig. 5 is a front view of a proposed laser welding nozzle according to an embodiment of the present invention;

fig. 6 is a top view of a proposed laser welding nozzle according to an embodiment of the present invention;

fig. 7 is a bottom view of a proposed laser welding nozzle according to an embodiment of the present invention;

fig. 8 is a perspective view of a laser welding nozzle according to a second embodiment of the present invention, wherein the external convex portion is partially enlarged;

fig. 9 is a perspective view of a laser welding nozzle according to the second embodiment of the present invention at another viewing angle, in which a bottom three-dimensional structure of the laser welding nozzle can be seen;

fig. 10 is a perspective view of a laser welding nozzle according to a second embodiment of the present invention, in which an extended path of a suction gas path inside the laser welding nozzle is shown by a dotted line;

fig. 11 is a left side view of a laser welding nozzle according to a second embodiment of the present invention, in which an extended path of a suction gas path inside the laser welding nozzle is shown by a dotted line;

fig. 12 is a front view of a laser welding nozzle according to a second embodiment of the present invention;

fig. 13 is a top view of a laser welding nozzle according to a second embodiment of the present invention;

fig. 14 is a bottom view of a laser welding nozzle according to a second embodiment of the present invention;

fig. 15 is a perspective view of a laser welding nozzle according to a third embodiment of the present invention, wherein the external convex portion is partially enlarged;

fig. 16 is a perspective view of a laser welding nozzle according to a third embodiment of the present invention, from another perspective view, showing a bottom perspective structure of the laser welding nozzle;

fig. 17 is a perspective view of a laser welding nozzle according to a third embodiment of the present invention, in which an extended path of a suction gas path inside the laser welding nozzle is shown by a dotted line;

fig. 18 is a left side view of a laser welding nozzle according to a third embodiment of the present invention, in which an extended path of a suction gas path inside the laser welding nozzle is shown by a dotted line;

fig. 19 is a front view of a laser welding nozzle according to a third embodiment of the present invention;

fig. 20 is a top view of a laser welding nozzle according to a third embodiment of the present invention;

fig. 21 is a bottom view of a laser welding nozzle according to a third embodiment of the present invention;

fig. 22 is a perspective view of a laser welding nozzle according to an embodiment of the present invention, which is used in cooperation with a laser beam to perform welding.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

In the drawings, the shape and size may be exaggerated for clarity, and the same reference numerals will be used throughout the drawings to designate the same or similar components.

Unless defined otherwise, technical or scientific terms used herein shall have the ordinary meaning as understood by one of ordinary skill in the art to which this invention belongs. The use of "first," "second," and similar terms in the description and in the claims does not indicate any order, quantity, or importance, but rather is used to distinguish one element from another. Also, the use of the terms "a," "an," or "the" and similar referents do not denote a limitation of quantity, but rather denote the presence of at least one. The word "comprise" or "comprises", and the like, means that the element or item listed before "comprises" or "comprising" covers the element or item listed after "comprising" or "comprises" and its equivalents, and does not exclude other elements or items. "upper", "lower", "left", "right", and the like are used merely to indicate relative positional relationships, and when the absolute position of the object being described is changed, the relative positional relationships may also be changed accordingly.

In the following description, terms such as center, thickness, height, length, front, back, rear, left, right, top, bottom, upper, lower, etc., are defined with respect to the configurations shown in the respective drawings, and in particular, "height" corresponds to a dimension from top to bottom, "width" corresponds to a dimension from left to right, "depth" corresponds to a dimension from front to rear, which are relative concepts, and thus may be varied accordingly depending on the position in which it is used, and thus these or other orientations should not be construed as limiting terms.

Terms concerning attachments, coupling and the like (e.g., "connected" and "attached") refer to a relationship wherein structures are secured or attached, either directly or indirectly, to one another through intervening structures, as well as both movable or rigid attachments or relationships, unless expressly described otherwise.

Example one

According to the embodiment of the present invention, in combination with the illustration of fig. 1 to 3, it can be seen that the laser welding nozzle 100 includes:

a mounting section 110;

an overhanging section 120 integrally coupled to the mounting section 110 at one end of the mounting section 110 and extending downward from the mounting section 110; and

an extension section mounted to the bottom of the overhanging section 120;

wherein the outer circumference of the extension section at least partially protrudes outside the overhang section 120 to form an outer protrusion 130, a light transmission hole 133 penetrating through the upper and lower surfaces of the outer protrusion 130 is opened in the outer protrusion 130, and the light transmission hole 133 is opened at the outer side thereof to divide the outer protrusion 130 into a suction block 131 and a compression block 134. Referring to fig. 22, during welding, the laser welding suction nozzle 100 sucks the workpiece 541 by the convex portion 130 and transfers the workpiece 541 to a corresponding position of the welding base 54, the region to be welded of the workpiece 541 is exposed by the light transmission hole 133, and the laser beam 441 emitted by the laser generator 44 is emitted from above the light transmission hole 133 into the region to be welded of the workpiece 541 for welding. By adopting the technical scheme, the light hole 133 is arranged on the laser welding suction nozzle 100, a laser avoiding station is not required to be additionally reserved beside the suction nozzle, on one hand, the transverse installation space of the suction nozzle is kept small enough, the laser beam 441 can be injected from the right top of a workpiece through the light hole 133, energy dissipation of the laser beam 441 caused by the fact that the laser light path is prolonged intentionally is reduced, welding efficiency and welding quality are improved, on the other hand, interference influence of other parts on the laser light path can be reduced due to the arrangement of the light hole 133, the welding efficiency and the welding quality are further improved, finally, the arrangement of the light hole 133 can play a certain role in blocking high-temperature welding scraps generated in the welding process, and the welding scraps are prevented from causing damage and potential safety hazards to the workpiece.

Referring again to fig. 1, it can be seen that at least a portion of the sidewall 135 of the light-transmitting hole extends upward from the bottom to form a taper, so that the inner diameter of the light-transmitting hole is gradually expanded from bottom to top. In a specific implementation, the sidewall 135 may be a cone shape with a large top and a small bottom, or a square cone shape with a large top and a small bottom. Adopt above-mentioned technical scheme the structure, because the internal diameter of light trap is the trend of gradually expanding along the orientation from up down for when the laser beam jets into from the top of light trap, further reduced the interference influence that the inner wall of light trap led to the fact the laser beam, be convenient for simultaneously operating personnel or visual detection system track, monitor in real time to the welding area on the work piece.

Referring to fig. 3 and 4, the internal structure of the laser welding nozzle 100 is shown in detail, specifically, a suction hole is opened at the bottom of the suction block 131, and a suction air path 140 extending to the suction hole is opened inside the laser welding nozzle 100.

Further, the suction air path 140 includes a first air path 141, a second air path 142 and a third air path 143 respectively extending inside the mounting section 110, the suspending section 120 and the extending section, wherein the second air path 142 is respectively communicated with the first air path 141 and the third air path 143, and the third air path 143 is communicated with the suction hole.

In a specific implementation, the extending direction of the first air path 141 is consistent with the length direction of the mounting section 110;

the first air path 141 extends outwards from the inside of the mounting section 110 until a first machining hole 111 is formed in the side surface of the mounting section 110; the second air passage 142 extends outward from the inside of the overhanging section 120 until a second machining hole 113 is formed at the side of the mounting section 110 or the overhanging section 120. Although not all of them are shown, it should be understood that the second tooling hole 113 is not exclusively formed, and in the present embodiment, the second tooling hole 113 is formed at the top of the overhanging section 120.

During processing, a drilling tool can drill in from the first processing hole 111 along the length direction of the mounting section 110 until the first air path 141 is expanded to the joint of the mounting section 110 and the overhanging section 120, then the second air path 142 starts to be drilled on the second processing hole 113, finally the second air path 142 is communicated with the first air path 141, finally the third air path 143 starts to be drilled from the bottom of the suction block 131, finally the third air path 143 is communicated with the second air path 142, after the first air path 141, the second air path 142 and the third air path 143 are processed, the vacuum generating hole 112 leading to the first air path 141 is opened on the side surface of the mounting section 110, when in use, the first processing hole 111 and the second processing hole 113 are plugged by a plug, and simultaneously the air suction pipe of the vacuum generator is abutted to the vacuum generating hole 112, so that negative pressure can be generated inside the suction air path 140. By adopting the structure of the technical scheme, the suction nozzle is provided with the built-in suction gas circuit, and the suction gas circuit is arranged into three sections according to the extending path of the suction gas circuit, so that the problem that the traditional external gas circuit interferes with laser beams is avoided, and the problems that the traditional built-in gas circuit is difficult to process and has high production and manufacturing costs are also avoided.

Referring next to fig. 2, 3, 4 and 7, the elastomer 132 is shown in detail. Specifically, the bottom of the suction block 131 is provided with an elastic body 132 covering the periphery of the suction hole, and a suction port 1321 communicated with the suction hole is opened in the elastic body 132.

In a specific implementation, the elastic body 132 is made of a thermoplastic elastic material in the shape of polystyrene, and the elastic body 132 is fixed to the bottom of the suction block 131 by means of two-color injection molding; the mounting section 110, the overhang section 120 and the extension section are made of beryllium copper or ceramic materials; the surfaces of the mounting section 110, the suspending section 120 and the extending section are plated with diamond-like carbon film layers. By adopting the structure of the technical scheme, as the periphery of the suction hole is covered with the elastomer made of the thermoplastic elastic material, the contact friction force between the suction nozzle and the workpiece is improved, the preset suction area on the workpiece is conveniently and accurately sucked, meanwhile, the probability of vacuum breaking of the suction nozzle in the suction process is reduced, and the workpiece is prevented from being scratched by the suction nozzle in the suction process; furthermore, the suction nozzle is made of beryllium copper or ceramic materials, and meanwhile, the surface layer of the suction nozzle is plated with the diamond-like carbon film layer, so that the capability of the suction nozzle for bearing laser erosion is greatly improved, and the service life of the suction nozzle is prolonged; further, because the elastomer adopts the mode of double-colored injection moulding to fix to absorb the bottom of piece, the elastomer uses the back that appears wearing and tearing through a period of time, in order not to influence the precision of absorbing, can realize the change to the elastomer through the mode of the new elastomer of secondary injection moulding after peeling off the elastomer of wearing and tearing, not only makes the maintenance of suction nozzle more economical, and the difference in performance can not appear in the elastomer after the change moreover, and this undoubtedly helps improving welding quality.

Referring now to fig. 2 and 6, which illustrate the bottom of the laser welding nozzle 100, it can be seen that the bottom edge of the light hole 133 is provided with at least one feature positioning block 136, and the feature positioning block 136, the pressing block 134 and the bottom of the elastic body 132 are all located on the same horizontal plane. In this embodiment, only one feature positioning block 136 is provided, and the feature positioning block 136 mainly plays a role in stably pressing the peripheral area of the to-be-welded area of the workpiece and the welding substrate, so as to prevent quality problems such as poor welding, desoldering, and weld cracking caused by deformation such as undulation and warpage of the peripheral area during welding. Although not shown here, it should be understood that the feature locator block 136 may be provided in plurality along the bottom edge of the light-transmissive hole 133 if it is desired to hold the workpiece and the weld base closer together.

Referring to fig. 4 and 7 again, the mounting segment 110 is integrally formed with a mounting positioning bar 114 protruding from a side surface thereof, and an extending direction of the mounting positioning bar 114 is identical to a length direction of the mounting segment 110.

The embodiment also discloses a laser welding gun, which comprises the laser welding nozzle 100.

Example two

According to the embodiment of the present invention, in combination with the illustrations of fig. 8 to 11, it can be seen that the laser welding nozzle 200 includes:

a mounting section 210;

a hanging section 220 integrally coupled to the mounting section 210 at one end of the mounting section 210 and extending downward from the mounting section 210; and

an extension section mounted to the bottom of the overhanging section 220;

wherein the outer circumference of the extension section at least partially protrudes outside the overhang section 220 to form an outer protrusion 230, a light transmission hole 233 penetrating through the upper and lower surfaces of the outer protrusion 230 is opened in the outer protrusion 230, and the light transmission hole 233 is opened at the outer side thereof to divide the outer protrusion 230 into a suction block 231 and a pressing block 234. When welding, the laser welding suction nozzle 200 sucks the workpiece through the convex part 230 and transfers the workpiece to a corresponding position of a welding base, the area to be welded of the workpiece is exposed by the light transmission hole 233, and a laser beam is emitted into the area to be welded of the workpiece from above the light transmission hole 233 to perform welding operation. Adopt above-mentioned technical scheme the structure, it does not need to reserve laser additionally on the side of suction nozzle and dodges the station with the light trap on seting up the suction nozzle, this one side makes the horizontal installation space of suction nozzle kept enough little, the laser beam can penetrate into from the work piece directly over through the light trap, reduced because the laser beam energy dissipation that the laser light path leads to by the deliberate extension, welding efficiency and welding quality have been improved, on the other hand, the setting of light trap can reduce the interference influence that spare part led to the fact the laser light path, welding efficiency and welding quality have further been improved, finally, the setting of light trap can play certain effect of blockking to the high temperature welding bits that the welding in-process produced, prevent that the welding bits from splashing and causing the destruction to the work piece.

Referring again to fig. 8, it can be seen that at least a portion of the sidewall 235 of the light-transmissive hole extends upward from the bottom to form a taper, so that the inner diameter of the light-transmissive hole is gradually expanded from bottom to top. In a specific implementation, the sidewall 235 may be a cone with a large top and a small bottom, or a square cone with a large top and a small bottom. Adopt above-mentioned technical scheme the structure, because the internal diameter of light trap is the trend of gradually expanding along the orientation from up down for when the laser beam jets into from the top of light trap, further reduced the interference influence that the inner wall of light trap led to the fact the laser beam, be convenient for simultaneously operating personnel or visual detection system track, monitor in real time to the welding area on the work piece.

Referring to fig. 10 and 11, the internal structure of the laser welding nozzle 200 is shown in detail, specifically, a suction hole is opened at the bottom of the suction block 231, and a suction air path 240 extending to the suction hole is opened inside the laser welding nozzle 200.

Further, the suction air path 240 includes a first air path 241, a second air path 242 and a third air path 243 respectively extending inside the mounting section 210, the hanging section 220 and the extending section, wherein the second air path 242 is respectively communicated with the first air path 241 and the third air path 243, and the third air path 243 is communicated with the suction hole.

In a specific implementation, the extending direction of the first air path 241 is consistent with the length direction of the mounting section 210;

the first air path 241 extends outwards from the inside of the mounting section 210 until a first machining hole 211 is formed in the side surface of the mounting section 210; the second air passage 242 extends outward from the interior of the overhanging section 220 until a second machining hole 213 is formed at the side of the mounting section 210 or the overhanging section 220. Although not all of them are shown, it should be understood that the opening position of the second machining hole 213 is not exclusive, and in the present embodiment, the second machining hole 213 is opened at the side of the overhang pattern 220.

During machining, a drilling tool can drill in from the first machining hole 211 along the length direction of the installation section 210 until the first air path 241 is expanded to the joint of the installation section 210 and the overhanging section 220, then the second air path 242 starts to be drilled on the second machining hole 213, finally the second air path 242 is communicated with the first air path 241, finally the third air path 243 starts to be drilled from the bottom of the suction block 131, finally the third air path 243 is communicated with the second air path 242, after the first air path 241, the second air path 242 and the third air path 243 are machined, the vacuum generating hole 212 communicated with the first air path 241 is formed in the side surface of the installation section 210, when in use, the first machining hole 211 and the second machining hole 213 are sealed by plugs, and simultaneously the air suction pipe of the vacuum generator is abutted to the vacuum generating hole 212, so that negative pressure can be generated inside the suction air path 240. By adopting the structure of the technical scheme, the suction nozzle is provided with the built-in suction gas circuit, and the suction gas circuit is arranged into three sections according to the extending path of the suction gas circuit, so that the problem that the traditional external gas circuit interferes with laser beams is avoided, and the problems that the traditional built-in gas circuit is difficult to process and has high production and manufacturing costs are also avoided.

Referring next to fig. 9, 10, 11 and 14, the resilient body 232 is shown in detail. Specifically, the bottom of the suction block 231 is provided with an elastic body 232 covering the periphery of the suction hole, and the elastic body 232 is provided with a suction port 2321 communicated with the suction hole.

In a specific implementation, the elastic body 232 is made of a thermoplastic elastic material in the shape of polystyrene, and the elastic body 232 is fixed to the bottom of the suction block 231 by means of two-color injection molding; the mounting section 210, the overhang section 220 and the extension section are made of beryllium copper or ceramic materials; the surfaces of the mounting section 210, the suspending section 220 and the extending section are plated with diamond-like carbon film layers. By adopting the structure of the technical scheme, as the periphery of the suction hole is covered with the elastomer made of the thermoplastic elastic material, the contact friction force between the suction nozzle and the workpiece is improved, the preset suction area on the workpiece is conveniently and accurately sucked, meanwhile, the probability of vacuum breaking of the suction nozzle in the suction process is reduced, and the workpiece is prevented from being scratched by the suction nozzle in the suction process; furthermore, the suction nozzle is made of beryllium copper or ceramic materials, and meanwhile, the surface layer of the suction nozzle is plated with the diamond-like carbon film layer, so that the capability of the suction nozzle for bearing laser erosion is greatly improved, and the service life of the suction nozzle is prolonged; further, because the elastomer adopts the mode of double-colored injection moulding to fix to absorb the bottom of piece, the elastomer uses the back that appears wearing and tearing through a period of time, in order not to influence the precision of absorbing, can realize the change to the elastomer through the mode of the new elastomer of secondary injection moulding after peeling off the elastomer of wearing and tearing, not only makes the maintenance of suction nozzle more economical, and the difference in performance can not appear in the elastomer after the change moreover, and this undoubtedly helps improving welding quality.

Referring now to fig. 9 and 13, which illustrate the bottom features of the laser welding nozzle 200, it can be seen that the bottom edge of the light hole 233 is provided with at least one feature positioning block 236, and the feature positioning block 236, the pressing block 234 and the bottom of the elastic body 232 are all on the same horizontal plane. In this embodiment, only one feature positioning block 236 is provided, and the feature positioning block 236 mainly plays a role in stably pressing the peripheral area of the to-be-welded area of the workpiece and the welding substrate, so as to prevent quality problems such as poor welding, desoldering, and weld cracking caused by deformation such as undulation and warpage of the peripheral area during welding. Although not shown here, it should be understood that the feature locator block 236 may be provided in plurality along the bottom edge of the light transmissive hole 233 if it is desired to hold the workpiece and the weld base closer together.

Referring to fig. 11 and 14 again, the mounting section 210 is integrally formed with a mounting positioning bar 214 protruding from a side surface thereof, and an extending direction of the mounting positioning bar 214 is identical to a length direction of the mounting section 210.

The embodiment also discloses a laser welding gun, which comprises the laser welding nozzle 200.

EXAMPLE III

According to the embodiment of the present invention, in combination with the illustration of fig. 15 to 17, it can be seen that the laser welding nozzle 300 includes:

a mounting section 310;

an overhanging section 320 integrally coupled to the mounting section 310 at one end of the mounting section 310 and extending downward from the mounting section 310; and

an extension section mounted to the bottom of the overhanging section 320;

the outer periphery of the extension section at least partially protrudes outside the overhang section 320 to form an outer protrusion 330, a light transmission hole 333 penetrating through the upper and lower surfaces of the outer protrusion 330 is opened in the outer protrusion 330, and the light transmission hole 333 is opened at the outer side thereof to divide the outer protrusion 330 into a suction block 331 and a pressing block 334. When welding, the laser welding suction nozzle 300 sucks the workpiece through the convex part 330 and transfers the workpiece to a corresponding position of a welding base, the area to be welded of the workpiece is exposed by the light transmission hole 333, and a laser beam is emitted into the area to be welded of the workpiece from above the light transmission hole 333 to perform welding operation. Adopt above-mentioned technical scheme the structure, it does not need to reserve laser additionally on the side of suction nozzle and dodges the station with the light trap on seting up the suction nozzle, this one side makes the horizontal installation space of suction nozzle kept enough little, the laser beam can penetrate into from the work piece directly over through the light trap, reduced because the laser beam energy dissipation that the laser light path leads to by the deliberate extension, welding efficiency and welding quality have been improved, on the other hand, the setting of light trap can reduce the interference influence that spare part led to the fact the laser light path, welding efficiency and welding quality have further been improved, finally, the setting of light trap can play certain effect of blockking to the high temperature welding bits that the welding in-process produced, prevent that the welding bits from splashing and causing the destruction to the work piece.

Referring again to fig. 15, it can be seen that at least a portion of the sidewall 335 of the light-transmissive hole extends upward from the bottom in a tapered shape such that the inner diameter of the light-transmissive hole is gradually expanded in a direction from bottom to top. In a specific implementation, the sidewall 335 may be a cone with a large top and a small bottom, or may be a square cone with a large top and a small bottom. Adopt above-mentioned technical scheme the structure, because the internal diameter of light trap is the trend of gradually expanding along the orientation from up down for when the laser beam jets into from the top of light trap, further reduced the interference influence that the inner wall of light trap led to the fact the laser beam, be convenient for simultaneously operating personnel or visual detection system track, monitor in real time to the welding area on the work piece.

Referring to fig. 17 and 18, the internal structure of the laser welding nozzle 300 is shown in detail, specifically, the bottom of the suction block 331 is provided with a suction hole, and the inside of the laser welding nozzle 300 is provided with a suction air path 340 extending to the suction hole.

Further, the suction air path 340 includes a first air path 341, a second air path 342, and a third air path 343 respectively extending inside the mounting section 310, the suspending section 320, and the extending section, wherein the second air path 342 is respectively communicated with the first air path 341 and the third air path 343, and the third air path 343 is communicated with the suction holes.

In a specific implementation, the extending direction of the first air path 341 is consistent with the length direction of the mounting section 310;

the first air path 341 extends outward from the inside of the mounting section 310 until a first machining hole 311 is formed on a side surface of the mounting section 310; the second air passage 342 extends from the interior of the hanging section 320 to the outside until a second machining hole 313 is formed at the side of the mounting section 310 or the hanging section 320. Although not all of them are shown, it should be understood that the opening position of the second tooling hole 313 is not exclusive, and in the present embodiment, the second tooling hole 313 is opened at the top of the overhanging section 320.

During processing, a drilling tool can drill in from the first processing hole 311 along the length direction of the mounting section 310 until the first air path 341 is expanded to the joint of the mounting section 310 and the overhanging section 320, then the second air path 342 is drilled on the second processing hole 313, finally the second air path 342 is communicated with the first air path 341, finally the third air path 343 is drilled from the bottom of the suction block 331, finally the third air path 343 is communicated with the second air path 342, after the first air path 341, the second air path 342 and the third air path 343 are processed, the vacuum generating hole 312 communicated with the first air path 341 is opened on the side surface of the mounting section 310, when in use, the first processing hole 311 and the second processing hole 313 are sealed by plugs, and simultaneously the air suction pipe of the vacuum generator is abutted to the vacuum generating hole 312, so that negative pressure can be generated inside the suction air path 340. By adopting the structure of the technical scheme, the suction nozzle is provided with the built-in suction gas circuit, and the suction gas circuit is arranged into three sections according to the extending path of the suction gas circuit, so that the problem that the traditional external gas circuit interferes with laser beams is avoided, and the problems that the traditional built-in gas circuit is difficult to process and has high production and manufacturing costs are also avoided.

Referring next to fig. 16, 17, 18 and 21, the elastomer 332 is shown in detail. Specifically, the bottom of the suction block 331 is provided with an elastic body 332 covering the periphery of the suction hole, and the elastic body 332 is provided with a suction port 3321 communicated with the suction hole.

In a specific implementation, the elastic body 332 is made of a thermoplastic elastic material in the shape of polystyrene, and the elastic body 332 is fixed to the bottom of the suction block 331 by means of two-color injection molding; the mounting section 310, the suspending section 320 and the extending section are made of beryllium copper or ceramic materials; the surfaces of the mounting section 310, the suspending section 320 and the extending section are plated with diamond-like carbon film layers. By adopting the structure of the technical scheme, as the periphery of the suction hole is covered with the elastomer made of the thermoplastic elastic material, the contact friction force between the suction nozzle and the workpiece is improved, the preset suction area on the workpiece is conveniently and accurately sucked, meanwhile, the probability of vacuum breaking of the suction nozzle in the suction process is reduced, and the workpiece is prevented from being scratched by the suction nozzle in the suction process; furthermore, the suction nozzle is made of beryllium copper or ceramic materials, and meanwhile, the surface layer of the suction nozzle is plated with the diamond-like carbon film layer, so that the capability of the suction nozzle for bearing laser erosion is greatly improved, and the service life of the suction nozzle is prolonged; further, because the elastomer adopts the mode of double-colored injection moulding to fix to absorb the bottom of piece, the elastomer uses the back that appears wearing and tearing through a period of time, in order not to influence the precision of absorbing, can realize the change to the elastomer through the mode of the new elastomer of secondary injection moulding after peeling off the elastomer of wearing and tearing, not only makes the maintenance of suction nozzle more economical, and the difference in performance can not appear in the elastomer after the change moreover, and this undoubtedly helps improving welding quality.

Referring now to fig. 16 and 20, which illustrate the bottom of the laser welding nozzle 300, it can be seen that the bottom edge of the light-transmitting hole 333 is provided with at least one feature positioning block 336, and the feature positioning block 336, the pressing block 334 and the bottom of the elastic body 132 are all on the same horizontal plane. In this embodiment, only one feature positioning block 336 is provided, and the feature positioning block 336 mainly plays a role in stably pressing the peripheral area of the to-be-welded area of the workpiece and the welding substrate, so as to prevent quality problems such as poor welding, desoldering, and weld cracking caused by deformation such as undulation and warpage of the peripheral area during welding. Although not shown here, it should be understood that the feature locator block 136 may be provided in plurality along the bottom edge of the light-transmissive hole 133 if it is desired to hold the workpiece and the weld base closer together.

Referring to fig. 18 and 21 again, the mounting segment 310 is integrally formed with a mounting positioning bar 314 protruding from a side surface thereof, and an extending direction of the mounting positioning bar 314 is consistent with a length direction of the mounting segment 310.

The embodiment also discloses a laser welding gun, which comprises the laser welding nozzle 300.

The number of apparatuses and the scale of the process described here are intended to simplify the description of the present invention. Applications, modifications and variations of the present invention will be apparent to those skilled in the art.

While the embodiments of the invention have been disclosed above, it is not limited to the applications listed in the description and the embodiments, which are fully applicable in all kinds of fields of application suitable for this invention, and further modifications may be readily made by those skilled in the art, and the invention is therefore not limited to the specific details and illustrations shown and described herein, without departing from the general concept defined by the claims and their equivalents.

Claims (11)

1. A laser welding nozzle, comprising:

a mounting section (110, 210, 310);

a depending section (120, 220, 320) integrally joined to the mounting section (110, 210, 310) at one of the ends of the mounting section (110, 210, 310) and extending downwardly from the mounting section (110, 210, 310); and

an extension section mounted to a bottom of the depending section (120, 220, 320);

the outer periphery of the extension section at least partially protrudes out of the suspension section (120, 220, 320) to form an outer protrusion (130, 230, 330), a light transmission hole (133, 233, 333) penetrating through the upper surface and the lower surface of the outer protrusion (130, 230, 330) is formed in the outer protrusion (130, 230, 330), and the light transmission hole (133, 233, 333) is opened on the outer side of the outer protrusion to divide the outer protrusion (130, 230, 330) into a suction block (131, 231, 331) and a pressing block (134, 234, 334).

2. The laser welding nozzle as claimed in claim 1, characterized in that at least part of the side walls (135, 235, 335) of the light-transmitting holes (133, 233, 333) extends upward from the bottom in a tapered shape so that the inner diameters of the light-transmitting holes (133, 233, 333) are gradually enlarged in the direction from bottom to top.

3. The laser welding suction nozzle according to claim 1, wherein a suction hole is opened at the bottom of the suction block (131, 231, 331), and a suction air passage (140, 240, 340) extending to the suction hole is opened inside the laser welding suction nozzle.

4. The laser welding nozzle as claimed in claim 3, wherein the suction air path (140, 240, 340) includes a first air path (141, 241, 341), a second air path (142, 242, 342), and a third air path (143, 243, 343) extending inside the mounting section (110, 210, 310), the overhanging section (120, 220, 320), and the extending section, respectively, wherein the second air path (142, 242, 342) communicates with the first air path (141, 241, 341) and the third air path (143, 243, 343), respectively, and the third air path (143, 243, 343) communicates with the suction hole.

5. The laser welding nozzle as claimed in claim 4, characterized in that the first air path (141, 241, 341) extends in a direction that coincides with the length direction of the mounting section (110, 210, 310);

the first air path (141, 241, 341) extends outwards from the inside of the mounting section (110, 210, 310) until a first machining hole (111, 211, 311) is formed on the side surface of the mounting section (110, 210, 310); the second air passage (142, 242, 342) extends outwards from the inner part of the suspension section (120, 220, 320) until a second machining hole (113, 213, 313) is formed on the side surface of the mounting section (110, 210, 310) or the suspension section (120, 220, 320).

6. The laser welding nozzle according to claim 5, wherein a vacuum generating hole (112, 212, 312) leading to the first air passage (141, 241, 341) is further opened at a side surface of the mounting section (110, 210, 310).

7. The laser welding nozzle as claimed in claim 3, characterized in that the bottom of the suction block (131, 231, 331) is provided with an elastic body (132, 232, 332) covering the outer periphery of the suction hole, and a suction port (1321, 2321, 3321) communicating with the suction hole is opened in the elastic body (132, 232, 332).

8. The laser welding nozzle as claimed in claim 7, characterized in that the elastomer body (132, 232, 332) is made of a thermoplastic elastomer material, the elastomer body (132, 232, 332) being fixed to the bottom of the suction block (131, 231, 331) by means of two-shot injection molding; the mounting section (110, 210, 310), the depending section (120, 220, 320) and the extension section are made of beryllium copper or a ceramic material; the surfaces of the mounting section (110, 210, 310), the suspension section (120, 220, 320) and the extension section are plated with diamond-like carbon film layers.

9. The laser welding nozzle as claimed in claim 7, characterized in that the bottom edge of the light transmission hole (133, 233, 333) is provided with at least one feature positioning block (136, 236, 336), and the feature positioning block (136, 236, 336), the pressing block (134, 234, 334) and the bottom of the elastic body (132, 232, 332) are all on the same horizontal plane.

10. The laser welding nozzle as claimed in claim 1, characterized in that the mounting section (110, 210, 310) is integrally formed with a mounting and positioning strip (114, 214, 314) protruding from a side surface thereof, and an extending direction of the mounting and positioning strip (114, 214, 314) coincides with a length direction of the mounting section (110, 210, 310).

11. A laser welding torch, characterized in that it comprises the laser welding nozzle according to any one of claims 1 to 10.

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