KR20130108812A - Laser welding device having chamber - Google Patents

Abstract

PURPOSE: A laser welding device having a chamber is provided to prevent a generation of a foreign substance including a spatter etc. which is generated in a laser welding, and to dispose of a generated foreign substance including the spatter etc. effectively. CONSTITUTION: A laser welding device having a chamber comprises a frame (110), a laser oscillation unit (120), a chamber housing (130), a work table (140), a fixing jig unit (150), and the chamber. Various kinds of compositions of the laser welding device having the chamber are mounted on the frame. The laser oscillation unit is a component which oscillates a laser. The chamber housing is ascended and descended up and down by a lifting unit. The work table is a component which is located by placing a welded product. The fixing jig unit fixes the welded product by combining the work table with the chamber housing. The chamber is formed to divide a space where the welded product is welded from an outside.

Description

(Laser Welding Device Having Chamber)

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a laser welding apparatus, and more particularly, to a laser welding apparatus having a chamber capable of preventing generation and scattering of spatter generated during laser welding.

Recently, in the industrial field, laser processing apparatuses have been used in various fields such as cutting, grooving, marking as well as welding of metal objects

Fig. 1 is a basic configuration diagram of a general welding laser apparatus. The laser output apparatus 12 includes a laser output device 12 for irradiating a laser 14 to a welding portion of a workpiece 20, Is connected to a laser oscillator (10) which adjusts and supplies the output mode of the laser (14).

That is, the laser 14 oscillated by the laser oscillator 10 is irradiated to the welding site of the workpiece 20 to perform welding.

However, when a high heat source is applied to the welded portion by laser irradiation as described above, a large amount of spatter may be generated, and the generated spatter may be deposited on the welded material, resulting in welding failure.

In addition, there is a problem that the spatter is scattered on the path of the laser irradiation, which may degrade the irradiation efficiency of the laser.

Further, the spatter is scattered to a place other than the welding area, which makes it difficult to apply the spatter to a product requiring a clean environment in the manufacturing process.

Korean Patent No. 10-0913793

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems and it is an object of the present invention to provide a laser welding apparatus capable of preventing foreign matter such as a spatter generated during laser welding from being generated, There is provided a laser welding apparatus provided with a chamber for preventing interference of laser irradiation.

According to an embodiment of the present invention, there is provided a plasma processing apparatus comprising: a chamber in which a workpiece to be welded is positioned and a space in which welding is performed is divided from the outside; a laser oscillated from the outside of the chamber, There is provided a laser welding apparatus including a chamber including a glass made of a material through which a laser passes, and a gas supply unit for supplying a gas into the chamber.

The gas supply unit may include a first nozzle that injects gas to a site where the workpiece in the chamber is welded by the laser.

Alternatively, the gas supply unit may include a second nozzle for blowing foreign matter scattered in a path in which the laser in the chamber is irradiated.

The injection angle of the gas injected by the gas supply part can be adjusted.

The apparatus may further include a suction unit for sucking the scattered foreign matter in the chamber together with the air in the chamber.

The apparatus may further include a glass nozzle for spraying gas on one side of the glass.

The glass nozzle may be configured to inject gas toward the glass nozzle from the outside of the chamber so as to blow out the foreign substances stacked on the surface of the glass facing the outside of the chamber.

Alternatively, the glass nozzle may be configured to inject gas toward the glass nozzle from the inside of the chamber so as to blow off the foreign substances stacked on the surface of the glass facing the inside of the chamber.

Alternatively, the glass nozzle may be one that emits gas that cools the glass through which the laser passes.

On the other hand, in the chamber, there is provided a stationary jig unit for fixing the workpiece, and a foreign matter generated by the welding of the workpiece is dropped at a point corresponding to a lower side where welding of the workpiece is performed, Holes may be formed.

At this time, the gas supply unit may include a third nozzle that injects gas blowing foreign substances falling through the holes.

The laser welding apparatus provided with the chamber of the present invention has the following effects.

First, since the chamber for dividing the space where the welding is performed is provided outside, foreign substances such as spatter scattered in the chamber are prevented from being scattered to the outside of the chamber, which is advantageous when a manufacturing process of a clean environment is required .

Secondly, since a protective gas for suppressing the generation of foreign substances such as spatter is sprayed on the laser welded portion, the occurrence of spatters is reduced.

Thirdly, since foreign substances such as spatter scattered in the path of the laser beam are blown by the gas, the irradiation efficiency of the laser is further improved.

Fourthly, foreign matter such as spatter or beads generated on the welded portion drops downward through the hole to the chamber, so that the foreign matter is quickly excluded from the welding region.

Fifth, since a suction unit for sucking foreign substances such as spatter scattered in the chamber together with air inside the chamber is provided, it is possible to efficiently remove foreign substances such as spatter scattered in the chamber.

Sixth, foreign substances such as spatter scattered in the chamber can be sucked in the suction unit, filtered, and discharged, so that scattering of the spatter to the outside of the chamber can be effectively prevented.

Seventh, it is possible to prevent the irradiation efficiency of the laser from being reduced by the dust deposited on the upper surface of the glass by injecting gas onto the upper surface of the glass through which the laser penetrates into the chamber.

Eighth, it is possible to prevent the scattering of foreign substances such as spatter scattered by spraying gas on the surface of the glass that penetrates the inside of the chamber toward the inside of the chamber, so that the irradiation efficiency of the laser can be prevented from being reduced.

Ninthly, it is possible to prevent the glass from being deformed or denatured by the heat of the laser by injecting the cooling gas into the glass through which the laser penetrates into the chamber.

1 is a schematic view of a conventional laser welding apparatus;
2 is a perspective view of a welding apparatus provided with a chamber of the present invention;
3 is a cross-sectional view showing a state in which the chamber housing and the work table are separated from each other in Fig. 2;
FIG. 4 is a sectional view showing a state in which the chamber housing and the work table of FIG. 2 are engaged to form a chamber;
FIG. 5 is an enlarged perspective view of a portion of the chamber housing of FIG. 2 where the glass is placed; FIG.
FIG. 6 is a perspective view showing the suction unit of FIG. 2;
7 is a cross-sectional view showing the gas injection direction and the suction direction inside the chamber.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings. In describing the present embodiment, the same designations and the same reference numerals are used for the same components, and further description thereof will be omitted.

The laser welding apparatus including the chamber according to the present embodiment includes a frame 110 and a laser oscillating unit 120, a chamber housing 130, and a work table 140, as shown in FIGS. .

The frame 110 is a component for mounting various components of the laser welding apparatus provided with the chamber of the present embodiment and supporting the respective components.

The laser oscillating unit 120 is a component in which a laser is oscillated. The laser oscillated by the laser oscillating unit 120 may be irradiated toward the chamber housing 130, which will be described later. Further, although not shown in the figure, a separate driving unit (not shown) may be provided for moving and adjusting the position of the laser oscillating unit 120.

The work table 140 is a component in which the workpiece 20 is placed and positioned, and a suction hole 142 for attracting and fixing the workpiece 20 placed thereon can be formed on the upper surface.

The fixed jig unit 150 for fixing the workpiece 20 placed on the upper surface of the work table 140 may be provided with some components. The fixing jig unit 150 may include a pair of protrusions 152 spaced apart from each other by a predetermined distance.

The fixed jig unit 150 may fix the workpiece 20 while the work table is coupled with the chamber housing 130.

The chamber housing 130 is lifted up and down by a lifting part 134 and is engaged with the work table 140 to form a chamber 160 as a space in which the workpiece is welded together with the work table 140 .

3, when the chamber housing 130 is positioned on the upper side, the chamber 160 is opened. As shown in FIG. 4, when the chamber housing 130 is lowered When the work table 140 is engaged, the chamber 160 is closed.

The laser oscillating unit 120 may be provided outside the chamber housing 130 and may be provided to irradiate the laser 14 with the chamber 160 formed by the chamber housing 130 and the work table 140 have.

A glass 132 is provided on one side of the chamber 160 in order to irradiate laser to the workpiece 20 located in the chamber 160.

The glass 132 may be made of a material such as quartz through which the laser 14 can be transmitted, but it is not limited thereto and may be made of another material that can transmit laser.

3 and 4, the fixing jig unit 150 includes the protrusions 152 formed on the work table 140 and presses 154 formed on the chamber housing 130 .

The press 154 is disposed at a position corresponding to the projection 152 of the work table 140 at a portion of the chamber housing 130 in contact with the workpiece 20, The workpiece 20 can be fixed together with the projection 152 and a space through which the laser 14 passes can be formed.

A first chamber 162 may be formed in the chamber housing 130.

A second chamber 164 is formed below the projection 152 of the fixing jig unit 150 in the work table 140 and a pair of projections 152 constituting the fixing jig unit 150, A hole 144 communicating with the second chamber 164 may be formed. In this case, the holes 144 may be vertically formed.

When the chamber housing 130 and the work table 140 are engaged with each other, the first chamber 162 and the second chamber 164 form a chamber 160 as a welding space for the workpiece 20 .

The chamber 160 is formed so as to partition the space where the welding of the workpiece 20 is performed from the outside. Therefore, foreign matter such as spatter generated during welding can be prevented from scattering outside the chamber 160.

In the description of the present embodiment, the spatters can be used as a name representative of a foreign substance generated during welding.

The laser welding apparatus including the chamber according to the present embodiment may further include a gas supply unit.

The gas supply unit may be a component that minimizes the spatters present in the vicinity of the welding area by supplying gas into the chamber 160 to suppress the generation of the spatters or to blow scattered spatters.

The gas supply unit may include a first nozzle 172 for injecting a gas to a portion where the workpiece 20 in the chamber 160 is welded by the laser irradiated.

The gas injected through the first nozzle 172 may be a protective gas that can suppress the generation of spatter and protect the welding site.

Therefore, the amount of spatter generated can be reduced by supplying the protective gas to a portion where welding is performed by irradiating the laser to the workpiece 20. At this time, the protective gas injected through the first nozzle 172 may be nitrogen, argon, or the like, but is not limited thereto.

Meanwhile, spatters may be generated and scattered in the chamber 160 even though the first nozzle 172 injects the protective gas. At this time, scattered spatter is scattered by a path in which the laser 14 is irradiated in the chamber 160, and there is a risk that the laser welding efficiency is lowered by scattering and attenuating the laser 14.

Accordingly, the gas supply unit may include a second nozzle 174 that blows gas to the path through which the laser 14 in the chamber 160 is irradiated, thereby blowing gas scattered in the region. The spatter located in the path through which the laser is irradiated is blown through the second nozzle 174 and the efficiency of the laser can be maintained since there is no foreign matter scattering or attenuating the laser in the irradiation path of the laser 14 . At this time, the gas supplied to the second nozzle 174 may be a protective gas such as nitrogen or argon, or other gas such as air.

Meanwhile, foreign matter such as a bead or a heavy spatter generated during welding can naturally fall into the second chamber 164 through the holes formed between the projections 152 of the fixed jig unit 150.

In this case, the second chamber 164 may be provided with a third nozzle 176 that blows foreign substances dropped into the second chamber 164.

The gas injected from the first nozzle 172, the second nozzle 174, and the third nozzle 176 may be a clean gas free from foreign substances such as dust.

Further, the first nozzle 172, the second nozzle 174, and the third nozzle 176 can be adjusted in their injection angle and injection amount.

This is because, if the material and thickness of the workpiece 20 are changed, the intensity of the laser and the height of the spot where the laser is focused may be changed, and thus the point where the welding is performed may be changed, The amount can vary.

For this purpose, a spray angle adjusting unit 171 for adjusting the spray angle of the first nozzle 172, the second nozzle 174, and the third nozzle 176 may be provided. 5, the first nozzle 172 on the side of the chamber housing 130 is provided in a connector 173 which is coupled with a tube to which a gas is supplied, The connector 173 is provided to rotate and the angle of the angle at which the connector 173 is rotated may be limited to adjust the angle at which the gas is injected.

The present invention is not limited to this, and the first to seventh nozzles 172 to 176 may be arranged in the order of the first nozzle 172 to the third nozzle 176. However, Or may be provided for every nozzle.

Since the glass 132 is exposed to the outside of the chamber, external foreign matter such as dust can be accumulated on the surface facing the outside of the chamber housing 130. The stacked foreign matter scatters the irradiated laser, Lt; / RTI >

In order to prevent this, as shown in FIG. 6, a gas is sprayed toward a surface of the glass 132 facing the outside of the chamber on the rim of the outer surface of the glass 132 of the chamber housing 130, And a glass nozzle 178 blowing dust accumulated on the outer surface of the nozzle 132 may be provided.

The gas contained in the glass nozzle 178 may be clean air filtered by foreign substances, but is not limited thereto.

In addition, foreign substances such as spatter scattered on the surface of the glass 132 facing the inside of the first chamber 162 may be stacked.

7, the glass nozzle 178 injects gas toward the outside and inside of the first chamber 162 toward the outside of the chamber 132 and toward the inside of the chamber 132, So as to blow out foreign substances such as dust and spatter deposited on the outer and inner surfaces of the glass 132.

Since the glass 132 is a component through which the laser is transmitted, the focus of the laser 14 may not be focused on the glass 132 but may be overheated by the energy of the laser 14, which is continuously irradiated If the glass 132 is overheated, the glass 132 may be deteriorated to change the physical properties of the glass 132, and the laser may be abnormally refracted due to a change in shape due to expansion and contraction, thereby changing the point at which the laser focuses.

Therefore, a laser low reflection coating can be applied to the surface of the glass 132, or the glass 132 can be cooled as a gas ejected from the glass nozzle 178. [ At this time, the gas injected from the glass nozzle 178 is a cooling gas, and may be cooled air or gas of another component. Of course, it would be possible to apply it if the cooling effect is sufficient even if it is not an artificially cooled gas.

The first chamber 162 and the second chamber 164 are provided with a suction unit 180 for sucking foreign substances such as spatter blown by the gas injection unit together with air in the chamber 160 .

The spatters in the chamber 160 can be removed by sucking the spatters blown by the gas injection means together with the air in the chamber, thereby preventing adverse effects caused by the spatters.

The suction unit 180 as described above includes a first chamber inlet 182 coupled with the first chamber 162 to suck spatters in the first chamber 162 and a second chamber inlet 182 coupled with the second chamber 164, A second chamber inlet 184 for sucking the spatters in the chamber 164 and a fan 186 for generating a suction force and a filter 188 for filtering the spatters contained in the sucked air. At this time, the first chamber inlet 182 and the second chamber inlet 184 may be provided on the rear side of the first chamber 162 and the second chamber 164, respectively.

The air sucked by the suction unit 180 may be discharged to the outside after being filtered in the filter 188, or the protective gas such as nitrogen or argon contained in the gas may be separated and reused.

7 is a view showing the injection and movement directions of the gas in the chamber. 7, the bold arrows indicate the direction of gas movement.

As described above, the protective gas is injected from the first nozzle 172 toward the welded portion of the workpiece 20, and the gas is sprayed from the second nozzle 174 to the region irradiated with the laser in the chamber 160 , The gas may be injected so as to blow out the foreign substances dropped from the third nozzle 176 into the second chamber 164.

In addition, gas can be jetted from the glass nozzle 178 toward the surface of the glass 132.

At this time, the gas injected from the first nozzle 172 to the third nozzle 176 is injected into the first chamber inlet 182 and the second chamber inlet 184 in a direction in which air is sucked, By blowing the spatter, the removal efficiency of the spatter can be further improved.

It will be apparent to those skilled in the art that the present invention can be embodied in other specific forms without departing from the spirit or scope of the invention as defined in the appended claims. It is obvious to them. Therefore, the above-described embodiments should be regarded as illustrative rather than restrictive, and thus, the present invention is not limited to the above description and may be modified within the scope of the appended claims and their equivalents.

110: frame 120: laser oscillation part
130: chamber housing 132: glass
134: driving part 140: work table
142: adsorption hole 144: hole
150: fixed jig unit 152; spin
154: Press 160: Chamber
161: first chamber 162: second chamber
172: first nozzle 174: second nozzle
176: third nozzle 178: glass nozzle
180: suction portion 182: first chamber inlet
184: second chamber inlet port 186: fan
188: Filter

Claims (11)

A chamber in which the object to be welded is located and partitions a space where welding is made from the outside;
A glass provided with a material through which a laser passes to one side of the chamber in order for the laser oscillated from the outside of the chamber to be irradiated onto the welded object inside the chamber;
A gas supply unit for supplying gas into the chamber;
Laser welding apparatus provided with a chamber comprising a. The method of claim 1,
The gas supply unit,
And a chamber including a first nozzle for injecting a gas to a portion where the workpiece in the chamber is welded by the laser. The method of claim 1,
The gas supply unit,
And a chamber including a second nozzle that blows off foreign matter scattered in a path irradiated with the laser in the chamber. The method according to claim 2 or 3,
Laser welding device is provided with a chamber in which the injection angle of the gas injected by the gas supply is adjusted. The method of claim 1,
Laser welding device is provided with a chamber further comprises a suction unit for sucking the scattered foreign matter in the chamber. The method of claim 1,
Laser welding apparatus is provided with a chamber further comprises a glass nozzle for injecting gas on any one surface of the glass. The method according to claim 6,
The glass nozzle
And a chamber for injecting a gas toward the glass nozzle from the outside of the chamber to blow off the foreign materials stacked on the surface facing the outside of the chamber of the glass. The method according to claim 6,
The glass nozzle
And a chamber for injecting a gas toward the glass nozzle from the inside of the chamber to blow off the foreign materials stacked on the surface facing the inside of the chamber of the glass. The method according to claim 6,
The glass nozzle
And a chamber for injecting a gas for cooling the glass through which the laser passes. The method of claim 1,
In the chamber,
Fixing jig unit for fixing the welded object is provided,
Wherein the fixing jig unit is provided with a chamber in which a hole is formed in which a foreign matter generated by welding of the workpiece falls, at a position corresponding to a lower side where welding of the workpiece is performed. The method of claim 10,
The gas supply unit,
And a third nozzle for injecting a gas blowing a foreign substance dropped through the hole.

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