CN214350250U - Laser welding device - Google Patents

Abstract

The utility model provides a laser welding device, is including covering apron and air guide piece on treating the welding workpiece, be equipped with the pad on the work piece, be equipped with the messenger on the apron the spot welding bottom outlet that the pad surface exposes, the internal diameter of spot welding bottom outlet upside is greater than the internal diameter of downside so that the internal face of spot welding bottom outlet is the inclined plane, the air guide piece includes the inlet port, corresponds the welding hole and the intercommunication of spot welding bottom outlet the inlet port extremely the gas tank of welding hole bottom periphery, be formed with the outside air gap on the internal face of spot welding bottom outlet upside, inert gas certainly the air guide piece pours into via the outside air gap is followed the internal face of spot welding bottom outlet gets into downwards the pad surface and passes through the spot welding bottom outlet with discharge in the middle of the welding hole. The laser welding device is good in laser welding quality and low in cost.

Description

Laser welding device

Technical Field

The utility model relates to a metal processing field especially relates to a laser welding device.

Background

In laser welding production applications, inert gas is generally used to protect the welded joint in order to obtain good welding effect. The current common protective gas blowing modes include two types: firstly, a clamping air pipe mechanism is additionally arranged outside the welding mechanism for opposite blowing, but the effect is poor, the air needs to be blown all the time, and the air is wasted; still another gas shield type mechanism can satisfy the welding effect, but need often change expensive lens (lens cost about 1000 RMB), and gas also need fill the safety cover all the time, and the gas is with high costs.

SUMMERY OF THE UTILITY MODEL

Based on this, the utility model provides a laser welding device, through the welding hole upside internal face of apron forms the outside air gap, makes inert gas follow the outside air gap edge upwards discharge in order to take away smog etc. in the middle of following the spot welding bottom hole again after the internal face of welding hole dashes downwards, guarantees welding quality and reduces the processing cost.

For solving above-mentioned technical problem, the application provides a laser welding device, including covering apron and air guide piece on treating the weldment, be equipped with the pad on the work piece, be equipped with the messenger on the apron the spot welding bottom outlet of pad surface exposure, the internal diameter of spot welding bottom outlet upside is greater than the internal diameter of downside so that the internal face of spot welding bottom outlet is the inclined plane, the air guide piece includes the inlet port, corresponds the solder bore and the intercommunication of spot welding bottom outlet the inlet port extremely the gas tank of solder bore bottom periphery, be formed with the outside air gap on the internal face of spot welding bottom outlet upside, inert gas certainly the air guide piece pours into the via the outside air gap is followed the interior face of spot welding bottom outlet gets into downwards the pad surface and passes through the spot welding bottom outlet with discharge in the middle of the solder bore.

Preferably, the welding hole includes an upper welding hole and a lower welding hole, the inner diameter of the upper welding hole is larger than that of the lower welding hole, the lower welding hole protrudes downward and partially enters the spot welding bottom hole, and the outer side air gap is formed between the inner wall surface of the upper side of the spot welding bottom hole and the outer peripheral surface of the lower welding hole.

Preferably, a plurality of air inlets are arranged on two longitudinal sides of the air guide block, each welding hole is located between a pair of air inlets, and the air inlets are communicated into the air gap on the outer side through air grooves formed in the joint surface of the air guide block and the cover plate.

Preferably, the cover plate upper surface is provided with a notch, the spot welding bottom hole is formed by penetrating through the notch bottom wall, the air guide block is embedded in the notch, the laser welding device further comprises an air guide plate, and the air guide plate covers the air guide block and the cover plate upper surface.

Preferably, the upper surface of the air guide plate is provided with a plurality of air nozzles, and the bottom of the air guide plate is provided with a plurality of air grooves communicated with the air nozzles and the air inlet holes; and the gas guide plate is provided with through holes corresponding to the welding holes and the spot welding holes.

Preferably, laser welding device is still including being located gas guide plate between apron and the gas guide piece, the gas guide piece corresponds spot welding bottom hole position department runs through from top to bottom and is formed with the perforating hole, the perforating hole includes that the upside is the uncovered portion of loudspeaker form and is located uncovered portion's lower perpendicular oral area, the downward protrusion of perpendicular oral area forms the bulge, the bulge gets into spot welding bottom hole upside and spot welding bottom hole medial surface with form between the bulge lateral surface the outside air gap.

Preferably, the welding hole comprises an upper welding hole and a lower welding hole, the inner diameter of the upper welding hole is larger than that of the lower welding hole, the lower welding hole protrudes downwards and partially enters the open part of the spot welding bottom hole, the bottom of the lower welding hole is abutted against the inclined inner wall surface of the open part, and an air ring is formed between the lower welding hole and the inclined inner wall surface of the open part.

Preferably, the welding hole is further provided with a plurality of micro air holes which penetrate downwards from the inclined inner wall surface of the open part to the outer peripheral surface of the lower welding hole, and the micro air holes are communicated with the air ring and the outer air gap.

Preferably, the air groove of the air guide block is communicated with the air ring, and inert gas enters the outer air gap from the air inlet hole, the air ring and the micro air holes of the air guide block and is flushed into the welding pad of the workpiece downwards from the outer air gap along the inclined inner wall surface of the spot welding bottom hole.

This application laser welding device can make inert gas flow follow through setting up the spot welding bottom outlet that exposes the pad of work piece on the apron the downward air guide piece that gets into of spot welding bottom outlet internal face makes inert gas flow follow spot welding bottom outlet edge and gets into back again from the middle laser beam hole discharge and take away smog etc. along, makes the laser beam hole permeability good in order to keep the penetrability of laser beam, keeps good welding quality, reduces inert gas's use simultaneously. Meanwhile, a gas protection lens is not needed, and the processing cost is reduced.

Drawings

FIG. 1 is a perspective view of a workpiece requiring welding operations according to the present application;

FIG. 2 is a perspective view of the laser welding apparatus of the present application;

FIG. 3 is an exploded perspective view of the laser welding apparatus of the present application;

FIG. 4 is an exploded perspective view of another angle of the laser welding apparatus of the present application;

FIG. 5 is a sectional view taken along the line A-A of FIG. 2 and a partial enlarged view thereof;

fig. 6 is a sectional view taken along the line B-B of fig. 2 and a partially enlarged view thereof.

The attached drawings are as follows:

-10 a workpiece; an outer frame-11; wing plate-12; welding the thin sheet-13; an intermediate portion-131; a wing portion-132; -133 at the end; a disc-134; a first nut-14; a second nut-15; welding spot-16; an inner frame-17; a gas guide plate-20; a plate body-21; a first through-hole-22; a second through hole-23; an open portion-231; a vertical opening part-232; micro-pore-233; a male end-234; an air tap-24; a gas tank-25; a cover plate-30; a cover plate body-31; notch-32; spot welding a bottom hole-33; spot welding of the groove-331; an open bevel-332; an outer air gap-333; a slot bottom wall-35; a first air guide block-40; inlet ports-41, 51; air tank-42; weld hole-43, 52; upper weld hole-431, 521; lower weld holes-432, 522; a second air guide block-50.

Detailed Description

In order to facilitate understanding of the present invention, the present invention will be described more fully hereinafter with reference to the accompanying drawings. The preferred embodiments of the present invention are shown in the drawings. The invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.

It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.

Referring to fig. 1, the present application is directed to a workpiece 10 to be laser-welded according to the present application, and the workpiece 10 is a built-in elastic mechanism of a pen keyboard touch pad, and includes an outer frame 11, an inner frame 17, a wing plate 12, first and second nuts 14 and 15, and a welding sheet 13 which is formed by spot-welding and integrally connecting the outer frame 11, the inner frame 17, the wing plate 12, the first and second nuts 14 and 15. The welding sheet 13 includes a middle portion 131 corresponding to the inner frame 17 and the first nut 14, two wing portions 132 covering the wing plates 12 along the two lateral sides, end portions 133 extending from the two wing portions 132 to the two lateral sides to the outer frame 11, and a plurality of discs 134 extending from the two wing portions 132 to the two lateral sides and corresponding to the second nuts 15. The welding thin sheets 13 are of an integral structure, a plurality of welding points 16 are arranged on the welding thin sheets 13, the outer frame 11, the inner frame 17, the wing plates 12, the first nuts 14 and the second nuts 15, and the number of the welding points 16 is more than one hundred.

In practical application, the laser welding apparatus of the present application is suitable for not only welding the workpieces 10 described above, but also laser welding workpieces of various shapes. That is, the structural features of the example workpiece 10 do not limit the scope of protection of the laser welding apparatus of the present application.

Referring to fig. 2 to 6, the laser welding apparatus of the present application includes a cover plate 30, an air guide plate 20, and a plurality of air guide blocks 40 and 50.

The cover plate 30 covers the workpiece 10 and cooperates with a base (not shown) to close the workpiece 10. The cover plate 30 includes a cover plate body 31, a notch 32 formed on the upper surface of the cover plate body 31, and a plurality of spot welding bottom holes 33 penetrating the cover plate body 31 or the bottom wall 35 of the notch.

The air guide block comprises a first air guide block 40 and a second air guide block 50, and the second air guide block 50 is downwards embedded into the notch 32 of the cover plate 30. The second air guide block 50 includes a plurality of pairs of air inlet holes 51 vertically penetrating at both longitudinal sides, a welding hole 52 penetrating between the pair of air inlet holes 51, and an air groove 53 guiding air to the periphery of the welding hole 52. The welding holes 52 correspond to the spot welding bottom holes 33, and welding spots 16 of the workpiece 10 are distributed on the periphery of the bottom surfaces of the spot welding bottom holes 33.

The air guide plate 20 covers the cover plate 30, and includes a plate body 21, a first through hole 22 vertically penetrating the plate body 21 and exposing the upper side of the welding hole 52, and a second through hole 23 vertically penetrating the plate body 21 and directly exposing the upper side of the spot welding bottom hole 33. The bottom surface of the plate body is also provided with a plurality of air grooves 25, and a plurality of air nozzles 24 for guiding air flow into the air grooves 25 are arranged above the plate body 21.

The first air guide block 40 is assembled into the second through hole 23, and the first air guide block 40 includes an air inlet hole 41, a welding hole 43 and an air groove 42 communicating the air inlet hole 41 to the periphery of the welding hole 43.

In the first embodiment, as shown in fig. 5, the second through hole 23 of the air guide plate 20 includes an open portion 231 having a flared upper portion and a vertical portion 232 located below the open portion 231. The vertical opening 232 protrudes downward from the bottom surface of the air guide plate 20 to form a protruding end 234. The spot welding bottom hole 33 is in a taper hole shape, the inner diameter of the upper portion is larger than that of the lower portion, a plurality of spot welding grooves 331 are formed in the inner wall surface 332 of the spot welding bottom hole 33 in the vertical direction on one side close to the workpiece 10, and each spot welding groove 331 corresponds to one welding spot 16.

The bulge 234 of the second through hole 23 of the air guide plate 20 is sleeved in the spot welding bottom hole 33, and an outer air gap 333 is formed between the periphery of the bulge 234 and the inner wall surface 332 at the upper side of the spot welding bottom hole 33. A plurality of micro-pores 233 communicated with the periphery of the protruding portion 234 are formed on the inclined wall surface of the open portion 234 of the second through hole 23 in a downward penetrating manner, and the micro-pores 233 communicate the air groove 42 to the outer air gap 333.

The welding hole 43 of the first air guide block 40 includes an upper welding hole 431 and a lower welding hole 432, the inner diameter of the upper welding hole 431 to the lower welding hole 432 is gradually reduced, and the lower welding hole 432 is formed to protrude downward from the bottom surface of the first air guide block 40. The lower welding hole 432 enters the opening 231 of the second through hole 23 of the air guide plate 20, and the outer periphery of the bottom of the lower welding hole 432 abuts against the inclined wall surface of the opening 231, so that an air ring 433 is formed between the inner wall surface of the opening 231 and the outer periphery of the lower welding hole 432, and the top opening of the micro air hole 233 is located in the air ring 433.

When the workpiece 10 is subjected to spot welding in the first embodiment, inert gas is injected through the gas inlet 41 in advance for 1 second, so that the whole gas path is filled with the inert gas; subsequently, the laser welding device is overlaid on the workpiece 10 to start spot welding; during spot welding, a laser beam passes through the welding hole 43, the second through hole 23 and the spot welding bottom hole 33 to accurately reach the position of a welding spot 16 for welding, meanwhile, inert gas enters the gas ring 433 along the gas groove 42, enters the outer air gap 333 through the micro-pores 233 in the gas ring 433, fills the welding spot 16 downwards along the inclined inner wall surface of the spot welding bottom hole 33, and is finally discharged upwards from the spot welding bottom hole 33, the second through hole 23 and the welding hole 43 under pressure; and after the welding is finished, stopping flushing the inert gas. In inert gas volume discharge process, smog and the ionization cloud etc. that laser welding produced are taken away simultaneously to inert gas, make the laser beam hole of constituteing by spot welding bottom hole 33, second perforating hole 23 and spot welding hole 43 keep higher penetrability, can not cause welding quality problem because the penetrability of influence laser beam such as smog, inert gas protects welding spot 16 and controllable use inert gas and can not cause inert gas's waste simultaneously.

In the second embodiment, as shown in fig. 6, the spot-welding bottom hole 33 is formed through the notch bottom wall 32, and the spot-welding bottom hole 33 is also a tapered hole having an upper inner diameter larger than a lower inner diameter. The welding hole 52 of the second air guide block 50 includes an upper welding hole 521 on the upper side and a lower welding hole 522 on the lower side, the inner wall surface of the upper welding hole 521 is an inclined surface, the lower welding hole 522 is formed by protruding downwards from the bottom surface of the second air guide block 50, and the lower welding hole 522 enters the spot welding bottom hole 33 and forms an outer air gap 333 between the periphery of the lower welding hole 522 and the inner wall surface of the spot welding bottom hole 33. The first through hole 22 of the gas guide plate 20 is located above the solder hole 52. Inert gas enters the air groove 25 from the air tap 24 on the air guide plate 20, the air groove 25 is communicated with the air inlet hole 51 of the first air guide block 51, and the bottom of the air inlet hole 51 enters the outer air gap 333 through the air groove 53 arranged at the bottom of the first air guide block 50. The lower welding hole 522 is not necessarily a closed ring structure, but may be a sheet-like structure (as shown in fig. 4).

In the actual laser welding process, the inert gas is injected into the gas nozzle 24 for 1 second in advance, and the inert gas will fill the gas grooves 25, 53, the gas inlet holes 51, the outer air gap 333 and the like; then the laser welding device covers the workpiece 10, inert gas is continuously injected into the workpiece 10 and air on the workpiece 10 is removed, and laser beams are irradiated onto the welding points 16 through the first through holes 22, the welding holes 52 and the spot welding bottom holes 33 for welding; in the process, the inert gas is continuously injected, and after the surface of the workpiece 10 is blocked, the inert gas is discharged from the middle along the spot welding bottom hole 33, the welding hole 52 and the first through hole 22, and meanwhile, the smoke, the ionized cloud and the like are discharged together; and the spot welding bottom hole 33, the welding hole 52 and the first through hole 22 constitute a laser beam hole for a laser beam to enter the welding spot 16.

The first embodiment is mainly suitable for circular pads, while the second embodiment is suitable for square pads. However, any bonding pad structure can be applied to the principle of the laser welding device for welding, namely, inert gas is injected into the periphery of the bonding pad and is finally discharged from the laser beam hole, so that welding smoke, ionized cloud and the like are taken away to avoid influencing the penetrability of the laser beam; meanwhile, the injection of inert gas can be controlled at any time, so that waste is avoided.

Thus, the first and second gas guides 40, 50 of the laser welding apparatus of the present application are used in various embodiments, and in one embodiment only one gas guide is required, which may be collectively referred to as a gas guide.

This application laser welding device is through setting up the spot welding bottom hole 33 that exposes the pad of work piece 10 on apron 30, and the rethread setting can make inert gas flow follow the downward air guide piece 40 that gets into of spot welding bottom hole internal face, 50 make inert gas flow follow spot welding bottom hole 33 edge and get into the back again from the middle laser beam hole discharge and take away smog etc. along, make laser beam hole permeability good in order to keep the penetrability of laser beam, keep good welding quality, reduce inert gas's use simultaneously. Meanwhile, a gas protection lens is not needed, and the processing cost is reduced.

The technical features of the above embodiments can be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the above embodiments are not described, but should be considered as the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above examples only represent preferred embodiments of the present invention, which are described in more detail and detail, but are not to be construed as limiting the scope of the invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.

Claims (9)

1. The utility model provides a laser welding device, is including covering apron and air guide piece on treating the welding workpiece, be equipped with the pad on the work piece, be equipped with the messenger on the apron the spot welding bottom outlet that the pad surface exposes, its characterized in that, the internal diameter of spot welding bottom outlet upside is greater than the internal diameter of downside so that the internal face of spot welding bottom outlet is the inclined plane, the air guide piece includes the inlet port, corresponds the welding hole and the intercommunication of spot welding bottom outlet the inlet port extremely the air pocket of welding hole bottom periphery, be formed with the outside air gap on the internal face of spot welding bottom outlet upside.

2. The laser welding apparatus as claimed in claim 1, wherein the weld hole includes an upper weld hole and a lower weld hole, the upper weld hole having an inner diameter larger than that of the lower weld hole, the lower weld hole bulging downward and partially entering into the spot welding backing hole, and the outer air gap being formed between an inner wall surface of an upper side of the spot welding backing hole and an outer peripheral surface of the lower weld hole.

3. The laser welding apparatus as claimed in claim 2, wherein a plurality of said gas inlet holes are provided on both longitudinal sides of said gas guide block, each of said welding holes is located between a pair of said gas inlet holes, and said gas inlet holes are communicated to said outside air gap through a gas groove provided at a junction surface of said gas guide block and said cover plate.

4. The laser welding apparatus as claimed in claim 3, wherein a notch is formed on an upper surface of the cover plate, the spot welding bottom hole is formed through a bottom wall of the notch, the gas guide block is inserted into the notch, and the laser welding apparatus further comprises a gas guide plate covering the gas guide block and the upper surface of the cover plate.

5. The laser welding apparatus as claimed in claim 4, wherein the upper surface of the air guide plate is provided with a plurality of air nozzles, and the bottom of the air guide plate is provided with a plurality of air grooves communicating the air nozzles with the air inlet holes; and the gas guide plate is provided with through holes corresponding to the welding holes and the spot welding holes.

6. The laser welding device according to claim 1, further comprising a gas guide plate located between the cover plate and the gas guide block, wherein a through hole is formed through the gas guide block vertically at a position corresponding to the spot welding bottom hole, the through hole comprises an open portion with a trumpet-shaped upper side and a vertical portion located below the open portion, the vertical portion protrudes downwards to form a protruding portion, and the protruding portion enters the upper side of the spot welding bottom hole and forms the outer air gap between the inner side surface of the spot welding bottom hole and the outer side surface of the protruding portion.

7. The laser welding apparatus as claimed in claim 6, wherein the welding hole includes an upper welding hole and a lower welding hole, the upper welding hole has an inner diameter larger than that of the lower welding hole, the lower welding hole protrudes downward and partially enters the open portion of the spot welding bottom hole, and the bottom of the lower welding hole abuts against the inclined inner wall surface of the open portion and forms a gas ring between the lower welding hole and the inclined inner wall surface of the open portion.

8. The laser welding apparatus as claimed in claim 7, wherein the welding hole is further provided with a plurality of micro-pores which penetrate downward from the inclined inner wall surface of the open portion to the outer peripheral surface of the lower welding hole, and the micro-pores communicate the gas ring and the outer air gap.

9. The laser welding apparatus as recited in claim 8, wherein the gas groove of the gas guide block is connected to the gas ring, and inert gas enters the outer gas gap from the gas inlet hole of the gas guide block, the gas ring and the micro-holes and is flushed from the outer gas gap down along the inclined inner wall surface of the spot welding bottom hole onto the pad of the workpiece.

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