KR102520937B1 - Method for Quartz Welding with Laser - Google Patents

Abstract

The present invention relates to a laser welding apparatus and a quartz welding method using a laser for more effectively welding a joint of quartz using a laser and a welding rod, and according to one aspect of the present invention, a first base material made of quartz is mounted and supported a jig having a first support surface, a second support surface supporting a second base material made of quartz which is arranged to be joined to one side of the first base material while forming an inclination with the first base material; a welding rod positioned at a junction between the first base material and the second base material; a laser irradiation unit for irradiating a laser to a junction between the first base material and the second base material and the welding rod; Feeding device for supplying the welding rod; And a control unit for controlling the laser irradiation unit and the feeding device; including. A laser welding device is disclosed.

Description

Quartz welding method using laser {Method for Quartz Welding with Laser}

The present invention relates to a quartz welding method using a laser for more effectively welding a junction of quartz using a laser and a welding rod.

Quartz is mainly used in processes that require an inert material that does not react with other materials in a high-temperature environment.

Such quartz should be manufactured in various shapes such as a cylindrical shape and a box shape according to a required shape, and two quartz plates may need to be bonded to each other as needed.

In general, welding techniques used in industrial sites are classified into fusion welding, pressure welding, and brazing. Various types of welding have been developed and are being implemented in the industrial field.

On the other hand, in the welding of quartz, a method of heating two base materials that are in contact with each other using a torch is generally used.

That is, after placing the sides of the two base materials in contact or overlapping, the base materials were welded by heating them using a torch.

However, depending on the shape of the product to be made, there are cases in which it is necessary to weld in a bent shape, and in some cases, in particular, parts with a thick base material must be welded. In this case, the conventional method using a torch is not effective. .

The present invention is to solve the above problems, even when two base materials to be welded to each other are joined inclined in a bent state rather than flat, the thickness of the welded portion can be maintained uniformly with the base material. Quartz welding method using a laser It is a challenge to provide

The tasks of the present invention are not limited to the tasks mentioned above, and other tasks not mentioned will be clearly understood by those skilled in the art from the description below.

In order to solve the above problems, according to one form of the present invention, a first support surface on which a first base material made of quartz is mounted and supported, so as to be bonded to one side of the first base material while forming an inclination with the first base material A jig provided with a second support surface on which a second base material made of quartz is supported; a welding rod positioned at a junction between the first base material and the second base material; a laser irradiation unit for irradiating a laser to a junction between the first base material and the second base material and the welding rod; Feeding device for supplying the welding rod; And a control unit for controlling the laser irradiation unit and the feeding device; including. A laser welding device is disclosed.

The first support surface and the second support surface are inclined to each other so that the first base material mounted on the first support surface and the second base material mounted on the second support surface form an angle within 180 degrees from each other. It can be.

The first base material and the second base material may have a thickness within 1 to 6 mm.

The welding rod may have a diameter equal to or smaller than the thickness of the first base material and the second base material.

The control unit moves the welding rod along the junction between the first base material and the second base material, and a moving speed of the welding rod may be in the range of 1 to 600 mm/min.

When the distance between the upper edge of the first base material facing the side joined to the second base material and the upper edge of the second base material facing the side joined to the first base material is W1, the controller The diameter of the laser beam irradiated to the joint between the and the second base material may be controlled to be greater than W1.

The diameter of the laser beam may be 6 mm or less.

When the distance between the upper edge of the first base material facing the side joined to the second base material and the upper edge of the second base material facing the side joined to the first base material is W1, the diameter of the welding rod is greater than W1 can be small

When the distance between the lower edge of the first base material facing the side joined to the second base material and the lower edge of the second base material facing the side joined to the first base material is W2, the W2 is in the range of 0 to 1 mm. can

The welding rod may be positioned to have an inclination of 0 to 45 degrees with respect to a junction between the first base material and the second base material.

The lower end of the welding rod may be located below the upper edge of the first base material facing the side joined to the second base material and the upper edge of the second base material facing the side joined to the first base material.

On the other hand, according to another aspect of the present invention, a first base material made of quartz, a second base material arranged to be joined at an angle to the first base material, and a laser beam using a welding rod for welding the first base material and the second base material. In the quartz welding method using a laser for welding the first base material and the second base material as a base material preparation step of positioning the first base material and the second base material in a jig; a provisional bonding step of temporarily bonding the joint between the first base material and the second base material located on the jig; Positioning the welding rod at the junction of the first base material and the second base material jointed together, and irradiating a laser to the junction of the welding rod and the first base material and the second base material to weld the first base material and the second base material A quartz welding method using a laser including a; welding step is disclosed.

The provisional joining step may be a step of spot welding the junction of the first base material and the second base material at predetermined intervals using the laser.

According to the quartz welding method using a laser of the present invention, when welding between two quartz base materials that are inclined to each other, welding is performed while simultaneously melting the two base materials and the welding rod using a welding rod and a laser, so that the space between the base materials can be filled through the welding rod, and the thickness of the welded portion is similar to that of the base material, so the strength of the welded portion is maintained.

The effects of the present invention are not limited to the effects mentioned above, and other effects not mentioned will be clearly understood by those skilled in the art from the description of the claims.

The above summary, as well as the detailed description of the preferred embodiments of the present application set forth below, will be better understood when read in conjunction with the accompanying drawings. Preferred embodiments are shown in the drawings for the purpose of illustrating the present invention. However, it should be understood that this application is not limited to the precise arrangements and instrumentalities shown.
1 is a perspective view showing a laser welding apparatus according to an embodiment of the present invention;
Figure 2 is an enlarged cross-sectional view of a portion where welding is performed by a laser welding apparatus according to an embodiment of the present invention;
Figure 3 is a view showing the angle of the welding rod of the laser welding apparatus according to an embodiment of the present invention;
Figure 4 is a flow chart showing an embodiment of a quartz welding method using a laser of the present invention;
Figure 5 is a view showing the state when the base material preparation step and temporary bonding step of the quartz welding method using a laser of the present invention;
6 is a view showing a cross-section of a welding portion of a quartz plate welded by the quartz welding method using a laser of the present invention.

Hereinafter, a preferred embodiment of the present invention in which the object of the present invention can be realized in detail will be described with reference to the accompanying drawings. In describing the present embodiment, the same name and the same reference numeral are used for the same configuration, and additional description thereof will be omitted.

Hereinafter, an embodiment of the laser welding apparatus of the present invention will be described.

As shown in FIG. 1, the laser welding apparatus according to this embodiment may include a jig 110, a welding rod 120, a laser irradiator 130, a feeding device 140, and a control unit 150.

In the jig 110, the first base material 10 and the second base material 20 to be welded to each other are mounted, and the sides of the first base material 10 and the second base material 20 facing each other while forming a mutual inclination contact can be supported.

At this time, the first base material 10 and the second base material 20 are made of a quartz material and may be formed in a flat plate shape. In addition, the side surfaces of the first base material 10 and the second base material 20 may form side surfaces perpendicular to the flat plate.

To this end, the jig 110 may form a first support surface 112 on which the first base material 10 is mounted and a second support surface 114 on which the second base material 20 is mounted.

The first support surface 112 and the second support surface 114 may be inclined to each other so that the first base material 10 and the second base material 20 are inclined to each other.

The first base material 10 mounted on the first support surface 112 and the second base material 20 mounted on the second support surface 114 form an angle within 180 degrees from each other, The first support surface 112 and the second support surface 114 may be inclined to each other.

In this embodiment, for example, the first base material 10 and the second base material 20 form an angle of 90 degrees and the first support surface 112 and the second support surface 114 also form an angle of 90 degrees. However, the present invention is not limited to the angle formed by the first base material 10 and the second base material 20, the first support surface 112 and the second support surface 114.

The angle between the first base material 10 and the second base material 20 may range from 70 degrees to 120 degrees, and if the angle is too narrow, the first base material 10, the second base material 20 and It is difficult for the welding rod 120 to penetrate the melt melted by the laser 132, and if the angle is too wide, the melt spreads widely, resulting in insufficient welding thickness.

The welding rod 120 is made of the same quartz material as the first base material 10 and the second base material 20, and may be formed in a rod shape with a circular cross section. The welding rod 120 is melted by a laser 132 to be described later, melted between the first base material 10 and the second base material 20, and then solidified to form the first base material 10 and the second base material 20. ) can be welded.

The laser irradiation unit 130 is a laser at the junction of the first base material 10 and the second base material 20 to melt the first base material 10, the second base material 20, and the welding rod 120. (132) is a component that investigates.

In addition, the feeding device 140 is a device for supplying the welding rod 120 .

As welding progresses, the laser 132 is irradiated and the welding rod 120 moves along the joint between the first base material 10 and the second base material 20 . Therefore, the laser irradiation unit 130 and the feeding device 140 may move along the junction between the first base material 10 and the second base material 20 .

Alternatively, while the laser irradiator 130 and the feeding device 140 are fixed, the jig 110 is transported so that the laser irradiator 130 can move the welding point.

The control unit 150 may control the laser irradiation unit 130 and the feeding device 140 . That is, the control unit 150 measures the temperature of the junction where the first base material 10 and the second base material 20 are welded through a sensor or the like, and accordingly, the focus and irradiation position of the laser 132 or It is possible to control the output and the like, and to control the supply amount and movement of the welding rod 120 of the feeding device 140.

Meanwhile, as shown in FIG. 2 , the first base material 10 and the second base material 20 mounted on the first support surface 112 and the second support surface 114 of the jig 110 Since the side cross section of ) is perpendicular to the plane, the first base material 10 and the second base material 20 may be spaced apart.

At this time, the upper edge of the first base material 10 facing the side joined with the second base material 20 and the upper edge of the second base material 20 facing the side joined with the first base material 10 The interval will be referred to as W1.

The tip of the welding rod 120 is the upper edge of the first base material 10 facing the side joined with the second base material 20 and the second base material 20 facing the side joined with the first base material 10. ) may be located between the upper edges of.

In a state where the tip of the welding rod 120 is located between the first base material 10 and the second base material 20, the laser 132 is irradiated to the first base material 10 and the second base material 20. ) and the welding rod 120 are simultaneously melted, and the first base material 10 and the second base material 20 may be welded while the molten metal is cooled and solidified.

At this time, the first base material 10 and the second base material 20 may have a thickness between 1 and 6 mm. In addition, the welding rod 120 may have a diameter equal to or smaller than the thickness of the first base material 10 and the second base material 20 .

For example, when the thicknesses of the first base material 10 and the second base material 20 are 3.5 mm, the diameter of the welding rod 120 may be 3.5 mm or smaller than 3 mm.

In addition, since the tip of the welding rod 120 should be located between the first base material 10 and the second base material 20, the first base material 10 facing the side to be joined with the second base material 20 When the distance between the upper edge of ) and the upper edge of the second base material 20 facing the side joined to the first base material 10 is W1, the diameter of the welding rod 120 may be smaller than W1 .

In addition, the lower end of the welding rod 120 is the upper edge of the first base material 10 facing the side bonded to the second base material 20 and the second base material facing the side joined with the first base material 10 It may be located lower than the upper edge of (20). This is because the lower end of the welding rod 120 should be located between the first base material 10 and the second base material 20 .

Meanwhile, the laser 132 irradiated to the first base material 10 and the second base material 20 heats both the junction of the first base material 10 and the second base material 20 and the welding rod 120 at once. The upper edge of the first base material 10 facing the side bonded to the second base material 20 and the upper edge of the second base material 20 facing the side joined with the first base material 10 so as to be able to When the interval is W1, the control unit 150 may control the diameter of the laser 132 beam irradiated to the junction between the first base material 10 and the second base material 20 to be greater than W1.

That is, when the interval of the W1 is 4.95 mm, the diameter of the beam of the laser 132 may be 6 mm larger than the W1.

In addition, the gap between the lower edge of the first base material 10 facing the side joined to the second base material 20 and the lower edge of the second base material 20 facing the side joined with the first base material 10 When is referred to as W2, the W2 may be in the range of 0 to 1 mm. That is, the lower edge of the first base material 10 and the lower edge of the second base material 20 may be disposed to be in contact with each other or to form a gap of 1 mm or less.

At this time, the output of the laser 132 may be 200 ~ 800W. If the output of the laser 132 is too low, the first base material 10, the second base material 20, and the welding rod 120 are not welded properly, resulting in welding defects or excessively long welding time. can

In addition, when the output of the laser 132 is too strong, the first base material 10, the second base material 20, and the welding rod 120 are melted too quickly, and a phenomenon in which they are cut rather than welded may occur. .

Of course, the present invention is not limited to the output of the laser 132, and can exhibit a wider range of output.

On the other hand, as shown in Figure 3, the welding rod 120 may be positioned inclined at an inclination of 0 to 45 degrees with respect to the junction of the first base material 10 and the first base material 10. It may preferably be inclined at 10 to 45 degrees, which is the laser 132 equipment or feeding device ( 140) is a range in which collision does not occur.

In addition, as the welding progresses, the laser 132 is irradiated and the welding rod 120 is moved along the joint between the first base material 10 and the second base material 20. At this time, the welding rod 120 is disposed parallel to the traveling direction of the welding rod 120, and the moving speed of the welding rod 120 may be 1 to 600 mm/min. The moving speed of the point where the laser 132 is irradiated may also be the same as the moving speed.

If the moving speed of the point where the laser 132 is irradiated is too slow, energy is concentrated to create an over-melting state, and if the moving speed is too fast, it cannot be sufficiently melted, resulting in welding defects. Therefore, the moving speed of the point where the laser 132 is irradiated and the sealing speed of the welding rod 120 may be preferably 50 to 200 mm/min.

In addition, when the speed at which the welding rod 120 is supplied is too slow, welding defects may occur due to insufficient welding, and when it is too fast, the welding rod 120 may not be sufficiently melted, resulting in welding defects. Therefore, the supply speed of the welding rod 120 may be 0-10 mm/sec. Of course, this may vary according to the output of the laser 132 .

Therefore, in a state where the welding rod 120 is positioned between the first base material 10 and the second base material 20, the laser 132 is irradiated so that the first base material 10 and the second base material 20 And the welding rod 120 is melted and solidified between the first base material 10 and the second base material 20 so that the first base material 10 and the second base material 20 can be welded. In addition, since the welding rod 120 melts and fills the space between the first base material 10 and the second base material 20, the thickness of the welding portion can be maintained uniformly.

Hereinafter, a quartz welding method using a laser according to an embodiment of the present invention will be described.

The quartz welding method using a laser according to the present embodiment may include a base material preparation step (S110), a temporary joining step (S120), and a welding step (S130).

As shown in FIG. 4, in the base material preparation step (S110), the first base material 10 and the second base material are placed on the first support surface 112 and the second support surface 114 of the jig 110. This is the step to settle (20).

At this time, the first base material 10 and the second base material 20 are not parallel to each other and may be arranged to form an inclination.

At this time, the lower edge of the first base material 10 facing the side joined with the second base material 20 and the lower edge of the second base material 20 facing the side joined with the first base material 10 When the interval is referred to as W2, the W2 may be in the range of 0 to 1 mm. That is, the lower edge of the first base material 10 and the lower edge of the second base material 20 may be disposed to be in contact with each other or to form a gap of 1 mm or less.

After the base material preparation step (S110), a temporary bonding step (S120) may be performed. As shown in FIG. 5 , the provisional bonding step (S120) is a step of temporarily bonding the junction of the first base material 10 and the second base material 20 through spot welding 160.

In the spot welding 160, the first base material 10 and the second base material 20 are joined by spot welding 160 at a predetermined distance using the laser 132. 2 This is a step of fixing the position by temporarily joining the base material 20.

Thereafter, after adjusting the spot-welded part 160 with the jig 110, a welding step (S130) may be performed.

As shown in FIGS. 1 and 2, in the welding step (S130), the welding rod 120 is placed at the junction of the tentatively joined first base material 10 and the second base material 20, and the laser 132 This is a step of welding the first base material 10 and the second base material 20 by irradiating a joint between the welding rod 120 and the first base material 10 and the second base material 20.

At this time, the lower end of the welding rod 120 is the upper edge of the first base material 10 toward the side bonded to the second base material 20 and the second base material toward the side joined to the first base material 10. It is located lower than the upper edge of the base material 20,

The laser 132 irradiated to the first base material 10 and the second base material 20 heats and melts both the junction of the first base material 10 and the second base material 20 and the welding rod 120 at once. The distance between the upper edge of the first base material 10 facing the side joined to the second base material 20 and the upper edge of the second base material 20 facing the side joined with the first base material 10 When is referred to as W1, the diameter of the laser 132 beam irradiated to the junction between the first base material 10 and the second base material 20 may be controlled to be larger than W1.

The welding rod 120 may be positioned inclined at an angle of 0 to 45 degrees with respect to the junction of the first base material 10 and the first base material 10 .

As the welding progresses in the welding step (S130), the laser 132 is irradiated and the welding rod 120 is moved along the junction between the first base material 10 and the second base material 20, At this time, the welding rod 120 is disposed parallel to the moving direction of the welding rod 120, and the moving speed of the welding rod 120 may be 1 to 600 mm/min. The moving speed of the point to which the laser 132 is irradiated may also be the same as the rolling speed.

In addition, although the welding rod 120 and the laser irradiation point are illustrated as moving in one direction in FIG. 3, the present invention is not limited thereto, and welding may be performed while moving in the opposite direction according to a welding start position.

As shown in FIG. 6, the first base material 10 and the second base material 20 welded in this way have a thickness of the welded portion of the first base material 10 and the second base material 20. The thickness of the base material 10 and the second base material 20 may be maintained similarly. The thickness of the welded portion between the first base material 10 and the second base material 20 may correspond to 80% to 120% of the thickness of the first base material 10 and the second base material 20 .

As described above, the preferred embodiments according to the present invention have been reviewed, and the fact that the present invention can be embodied in other specific forms without departing from the spirit or scope of the present invention in addition to the above-described embodiments is known to those skilled in the art. It is self-evident to them. Therefore, the embodiments described above are to be regarded as illustrative rather than restrictive, and thus the present invention is not limited to the above description, but may vary within the scope of the appended claims and their equivalents.

10: first base material 20: second base material
110: jig 112: first support surface
114: second support surface 120: welding rod
130: laser irradiation unit 132: laser
140: feeding device 150: control unit
160: spot welding S110: base material preparation step
S120: Temporary Joining Step S130: Welding Step

Claims (13)

A first base material 10 made of quartz material having a thickness within 1 to 6 mm, and a second base material 20 having a thickness within 1 to 6 mm disposed to be bonded to the first base material 10 at an angle of 180 degrees or less ), using a laser for welding the first base material 10 and the second base material 20 as a laser using a welding rod 120 for welding the first base material 10 and the second base material 20 As a quartz welding method,
A base material preparation step (S110) of positioning the first base material 10 and the second base material 20 on a jig 110;
a provisional bonding step (S120) of temporarily bonding the joint between the first base material 10 and the second base material 20 located on the jig 110;
Place a welding rod 120 having a diameter equal to or smaller than the thickness of the first base material 10 and the second base material 20 at the junction of the first base material 10 and the second base material 20 that have been jointed A welding step of welding the first base material 10 and the second base material 20 by irradiating a laser to the junction of the welding rod 120, the first base material 10, and the second base material 20 ( S130); including,
In the base material preparation step (S110), the lower edge of the first base material 10 facing the side joined with the second base material 20 and the second base material facing the side joined with the first base material 10 ( 20), when the interval of the lower edge is W2, the W2 is in the range of 0 to 0.5 mm,
In the temporary joining step (S120),
A step of spot welding the junction of the first base material 10 and the second base material 20 at a plurality of spaced apart positions at predetermined intervals using the laser, a quartz welding method using a laser. According to claim 1,
In the welding step (S130), the welding rod 120 is moved along the joint between the first base material 10 and the second base material 20, and the welding speed of the welding rod 120 is in the range of 1 to 600 mm/min. Quartz welding method using phosphorus and laser. According to claim 1,
In the welding step (S130),
The distance between the upper edge of the first base material 10 facing the side joined with the second base material 20 and the upper edge of the second base material 20 facing the side joined with the first base material 10 is W1 When, the diameter of the laser beam irradiated to the junction of the first base material 10 and the second base material 20 is controlled to be larger than W1, quartz welding method using a laser. According to claim 1,
In the welding step (S130), the lower end of the welding rod 120,
Located on the lower side of the upper edge of the first base material 10 facing the side joined to the second base material 20 and the upper edge of the second base material 20 facing the side joined to the first base material 10 A quartz welding method using a laser.
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