KR20210017046A - Jig apparatus for laser welding - Google Patents

Abstract

The present invention provides a jig apparatus for laser welding, capable of solving problems such as obstruction of a scanning path of a laser or obstruction of a movement path of a jig. According to an embodiment of the present invention, a jig apparatus for laser welding comprises: a base frame installed on the floor of the workshop; a locator which is provided on an upper part of the base frame and on which a welding object is seated; a jig unit coupled to the base frame and moving vertically to press and fix the welding object; and a protective gas injection part integrally coupled to the jig unit and injecting a protective gas toward a welding part of the welding object.

Description

Jig device for laser welding {JIG APPARATUS FOR LASER WELDING}

The present invention relates to a jig apparatus for laser welding, and more particularly, to a jig apparatus for laser welding in which a protection gas injection means for injecting a protection gas to a welding region is integrally formed with the welding jig.

In general, a jig device is a device to fix the object to be welded so that it does not move during processing such as cutting of material, sheet metal, welding, etc., and the clamping force or clamping part is different for each processing operation, and the clamping provided in the jig device The structure of the unit is also different.

The jig device as described above may supply a protective gas for blocking oxygen flowing into the welding area during laser welding. In this case, the protective gas may be supplied to the welding part by separately installing a flexible gas pipe in the jig device.

However, when a gas pipe is provided in a separate configuration in the jig device, it may interfere with the scanning path of the surrounding laser beam or interfere with the movement path of the jig device, so that the protective gas cannot be injected at an exact location.

Accordingly, there is a need to develop a technology capable of efficiently supplying the protective gas to the exact welding area and operating the jig device.

As a related prior art, there is Korean Registered Patent Publication No. 10-1801553 (name of invention: butt laser welding jig device, date of announcement: November 27, 2017).

In the embodiments of the present invention, a protective gas injection means for blocking oxygen in a welding area is integrally coupled to a clamper of a welding jig, thereby preventing the scanning path of the laser or the movement path of the jig caused by a separate protective gas injection means. It provides a jig device for laser welding that can solve problems such as interference.

In addition, embodiments of the present invention provide a jig device for laser welding that allows impurity gas or spatter generated during welding to be scattered to the outside by forming an exhaust means for discharging a protective gas in a clamper and a locator of the jig. .

The problem to be solved by the present invention is not limited to the problem(s) mentioned above, and another problem(s) not mentioned will be clearly understood by those skilled in the art from the following description.

A jig device for laser welding according to an embodiment of the present invention includes a base frame installed on the floor of a workshop, a locator on which a welding object is seated on the base frame, and coupled to the base frame to move up and down, and the welding A jig unit for pressing and fixing the object, and a protection gas injection unit integrally coupled with the jig unit and injecting a protection gas toward a welding portion of the welding object may be included.

In addition, the locator according to an embodiment of the present invention may include a first locator having a straight shape having an empty space therein with an upper portion open, and having both sides of the open upper portion facing each other.

In addition, a first exhaust part corresponding to a plurality of holes perforated along a length direction may be formed on an upper portion of the first locator according to an embodiment of the present invention.

In addition, the locator according to an embodiment of the present invention may include a second locator having a cylindrical shape formed with an empty space therein while the upper part is open.

In addition, the jig unit according to an embodiment of the present invention includes a support frame coupled to an upper portion of the base frame, and a first main unit that is mounted on the support frame and has an empty space inside with the lower side open. It may include a clamper.

In addition, the first main clamper according to an embodiment of the present invention is implemented to face each other so that both sides of the open lower part face each other, and a second exhaust part corresponding to a plurality of holes perforated along the length direction is formed under both sides. Can be.

In addition, the protective gas injection unit according to an embodiment of the present invention is integrally formed with the first main clamper, is installed on the support frame, and has one end connected to a gas supply source, and is coupled to the other end of the gas moving pipe. A gas injection block penetrating the support frame in a vertical direction, and a first gas injection member coupled to a lower portion of the penetrating gas block and injecting a protective gas into an empty space of the first main clamper.

In addition, at least one of the front and rear of the first main clamper according to an embodiment of the present invention may be opened.

In addition, the first gas injection member according to an embodiment of the present invention has a nozzle shape having a predetermined length and may be bent toward the open space of the first main clamper.

In addition, the jig unit according to an embodiment of the present invention is a support frame coupled to an upper portion of the base frame, and a cylindrical shape that is mounted on the support frame and has an empty space inside with the lower side open. It may include a second main clamper.

In addition, the protective gas injection unit according to an embodiment of the present invention is formed integrally with the second main clamper, is installed on the support frame, one end is coupled to a gas moving pipe connected to a gas supply source, and the other end of the gas moving pipe. A gas injection block penetrating the support frame in a vertical direction, and a second gas injection member coupled to a lower portion of the penetrating gas block to inject a protective gas into an empty space of the second main clamper.

In addition, it may further include a cylindrical gas penetrating portion surrounding the second gas injection member according to an embodiment of the present invention and having a plurality of holes for penetrating the protective gas along an outer circumferential surface.

In addition, an operation rod is fixed and installed outside of the base frame according to an embodiment of the present invention, and a sub-clamper is hinged to the upper end of the operation rod to further pressurize and fix the welding object. I can.

According to embodiments of the present invention, by integrally coupling the protective gas injection means for blocking oxygen at the welding site to the clamper of the welding jig, the laser scanning path obstruction or jig generated by the separate protective gas injection means is provided. It is possible to solve problems such as obstruction of the movement path.

In addition, according to embodiments of the present invention, by forming an exhaust means for discharging the protective gas in the clamper and the locator of the jig, impurity gas or spatter generated during welding may be scattered to the outside.

1A is a perspective view illustrating a state before welding in a jig device for laser welding according to an embodiment of the present invention.
1B is an enlarged view of portion A of FIG. 1A.
2A is a perspective view illustrating a state in which welding is performed in a jig device for laser welding according to an embodiment of the present invention.
2B is an enlarged view of portion B of FIG. 2A.
3 is a partial perspective view illustrating a locator according to an embodiment of the present invention.
4 is a partial perspective view illustrating an embodiment of a jig unit and a protective gas injection unit in an embodiment of the present invention.
5 is a partial perspective view illustrating another embodiment of a jig unit and a protective gas injection unit according to an embodiment of the present invention.
6A and 6B are diagrams illustrating in detail another embodiment of a jig unit and a protective gas injection unit of the present invention.

Advantages and/or features of the present invention, and a method of achieving them will become apparent with reference to the embodiments described later in detail together with the accompanying drawings. However, the present invention is not limited to the embodiments disclosed below, but will be implemented in a variety of different forms, only these embodiments make the disclosure of the present invention complete, and common knowledge in the technical field to which the present invention pertains. It is provided to completely inform the scope of the invention to those who have, and the invention is only defined by the scope of the claims. The same reference numerals refer to the same elements throughout the specification.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1A is a perspective view illustrating a state before welding in a jig device for laser welding according to an embodiment of the present invention, and FIG. 1B is an enlarged view of part A of FIG. 1A, and FIG. 2A is In the jig device for laser welding according to an embodiment of the present invention, it is a perspective view illustrating a state during welding, FIG. 2B is an enlarged view of part B of FIG. 2A, and FIG. 3 is In an embodiment, it is a partial perspective view illustrating a locator.

1A, 1B, 2A and 2B, a jig device 1 for laser welding according to an embodiment of the present invention includes a base frame 10, a locator 200, a jig unit 200 and a protection It may be configured to include a gas injection unit.

The base frame 10 may be installed on the floor of a workshop where welding is performed.

In this case, the base frame 10 may be provided directly on the bottom surface of the base frame 10, or may be coupled to a separate support stand as shown in FIGS. 1A and 2A to be spaced apart from the floor.

The locator 200 is provided above the base frame 10, and in this embodiment, the locator 200 may be symmetrically provided on both left and right sides with respect to the center of the base frame 10.

The locator 200 is a support member on which the object to be welded T is seated, and in this embodiment, a plurality of locators 200 may be provided along the longitudinal directions of both sides of the base frame 10.

Specifically, referring to FIG. 3, the locator 200 may be provided in various shapes according to the size, shape, and welding type of the object T to be welded.

In one embodiment, the locator 200 may include a first locator 110 having a straight shape formed with an empty space therein while the upper part is open.

The first locator 110 may be formed such that both side surfaces of the open upper part face each other along the length direction. In this case, welding may be performed between both side surfaces of the first locator 110 based on the inner space, and the welding object T may be welded in a straight shape.

A first exhaust part 115 corresponding to a plurality of holes drilled along the length direction may be formed on the first locator 110. The first locator 110 may discharge harmful welding gas generated as welding is performed through the first exhaust unit 115 to the outside. That is, the welding gas generated when welding the welding part of the object T seated on the first locator 110 flows into the internal space between the both sides of the first locator 110, and the introduced welding gas temporarily enters the internal space. After staying, it can be discharged to the outside by the first exhaust unit 115.

For reference, the first locator 110 may have two locators formed on top of the base frame 10 to face each other as shown in the drawing, but the present invention is not limited thereto, and one or a plurality of locators may be formed.

In another embodiment, the locator 200 may include a second locator 120 having a cylindrical shape formed with an empty space therein while the upper part is open.

In this case, welding may be performed along the circular inner space of the second locator 120, and the welding object T may be welded in a circular shape.

The second locator 120 may have an exhaust part (not shown) corresponding to a plurality of holes perforated on an outer peripheral surface or a lower side of the inner space.

Referring back to FIGS. 1A, 1B, 2A, and 2B, the jig unit 200 is coupled to the base frame 10 to move upward and downward, and may pressurize and fix the welding object T.

The jig unit 200 is coupled with a cylinder-shaped driving unit provided on the base frame 10 to move upward. In this embodiment, a plurality of driving units may be provided in the center of the base frame 10.

The jig unit 200 may include a support frame 210 and a clamper.

The support frame 210 may be coupled to the upper portion of the base frame 10, and in this embodiment, as the jig unit 200 is coupled to the driving unit provided on the base frame 10, the support frame 210 is placed on the upper portion of the driving unit. Can be combined.

The clamper is mounted on the support frame 210 and corresponds to a main clamper that directly presses and fixes a welded portion of the object T to be welded. The clamper in this embodiment may include at least one of the first main clamper 220a and the second main clamper 220b according to the shape of the welding part.

The first main clamper 220a is formed with an empty space inside with the lower side open, and may be implemented in a box shape. The empty space formed inside the first main clamper 220a is a space for spraying the protective gas, which will be described later with reference to FIG. 4.

The first main clamper 220a is for pressing and fixing the upper portion of the weld seated on the first locator 110 of the straight shape, and may be formed to correspond to the position of the first locator 110. That is, the first main clamper 220a and the first locator 110 may face each other with the welding portion of the object T interposed therebetween.

The second main clamper 220b is formed with an empty space inside with the lower side open, and may be implemented in a cylindrical shape. The empty space formed inside the second main clamper 220b is a space for spraying the protective gas, which will be described later with reference to FIGS. 6A and 6B.

The second main clamper 220b is for pressing and fixing the upper portion of the welding portion seated on the cylindrical second locator 120, and may be formed to correspond to the position of the second locator 120. That is, the second main clamper 220b and the second locator 120 may face each other with the welding portion of the object T interposed therebetween.

Meanwhile, the clamper may further include a sub clamper 240 for additionally pressing and fixing the welding object T.

To this end, the operation rod 20 may be fixed and installed outside the base frame 10, and the sub clamper 240 may be hinged to the upper end of the operation rod 20.

The jig unit 200 may further include a connection bracket 215 as a connection member for coupling the support frame 210 and the clamper. The connection bracket 215 may be provided at the end or one side of the support frame 210.

For reference, in the jig unit 200, two clampers may be formed opposite to each other on the left and right sides based on one support frame 210 as shown in the drawing, but the present invention is not limited thereto, and one or a plurality of clampers may be formed. May be.

The protective gas injection unit is integrally combined with the jig unit 200 and may inject the protective gas toward the welding portion of the object T.

In this embodiment, the protective gas injection unit may be directly coupled to the jig unit 200 to prevent problems caused by separately installing a conventional flexible gas pipe in the jig device.

4 is a partial perspective view illustrating an embodiment of a jig unit and a protective gas injection unit in an embodiment of the present invention.

Referring to FIG. 4, the protective gas injection unit may be integrally formed with the first main clamper 220a, and includes a gas moving pipe 310, a gas injection block 320, and a first gas injection member 330a. Can be.

The gas transfer pipe 310 is installed on the support frame 210 and one end may be connected to a gas supply source. In this embodiment, the gas moving pipe 310 may be provided along the upper portion of the support frame 210.

The gas injection block 320 may be coupled to the other end of the gas moving pipe 310 to penetrate the support frame 210 in the vertical direction. In this embodiment, the gas injection block 320 may pass through the connection bracket 215 coupled to the support frame 210.

The first gas injection member 330a is coupled to the lower portion of the passed through gas injection block 320 and may inject the protective gas into the empty space of the first main clamper 220a. That is, the first gas injection member 330a has a nozzle shape having a predetermined length, and is positioned in an empty space provided under the open lower side of the first main clamper 220a, so that the protective gas can be injected toward the empty space. .

In addition, in this embodiment, by injecting a protective gas from the inside of the first main clamper 220a through the first gas injection member 330a, the welding spatter generated by laser welding is scattered outward to prevent splashing on the welding part. Can play a role.

Meanwhile, the first main clamper 220a is implemented to face each other so that both sides of the open lower part face each other, and a second exhaust part 230 corresponding to a plurality of holes perforated along the length direction may be formed under both sides. have.

The first main clamper 220a may discharge harmful welding gas generated by welding through the second exhaust unit 230 to the outside. That is, as shown in FIG. 2A, when welding is performed while the first main clamper 220a pressurizes and fixes the welding part, the welding gas remaining in the clamper may be discharged to the outside by the second exhaust part 230. will be.

In addition, since the protective gas is also discharged through the second exhaust unit 230, generation of new impurity gas due to mixing of the welding gas and the protective gas can be prevented.

At least one of the front and rear of the first main clamper 220a may be opened, and thus, the welding gas may be more easily discharged to the outside while welding is being performed.

In this case, the first gas injection member 330a may be bent toward the open space of the first main clamper 220a. In other words, the first gas injection member 330a is preferably bent toward a direction opposite to the opened direction of the first main clamper 220a. Accordingly, the protective gas can be injected to the correct position of the welding part.

5 is a partial perspective view illustrating another embodiment of a jig unit 200 and a protective gas injection unit in an embodiment of the present invention, and FIGS. 6A and 6B are a jig unit 200 of the present invention and It is a diagram illustrating in detail another embodiment of the protective gas injection unit.

5, 6A and 6B, the protective gas injection unit may be integrally formed with the second main clamper 220b, and the gas moving pipe 310, the gas injection block 320, and the second gas injection member ( 330b).

The gas transfer pipe 310 is installed on the support frame 210 and one end may be connected to a gas supply source. In this embodiment, the gas moving pipe 310 may be provided along the upper portion of the support frame 210.

The gas injection block 320 may be coupled to the other end of the gas moving pipe 310 to penetrate the support frame 210 in the vertical direction. In this embodiment, the gas injection block 320 may pass through the connection bracket 215 coupled to the support frame 210.

The second gas injection member 330b is coupled to the lower portion of the passed through gas injection block 320 and may inject the protective gas into the empty space of the second main clamper 220b. That is, since the second gas injection member 330b is located in an empty space provided under the open lower side of the second main clamper 220b, the protective gas may be injected toward the empty space.

In addition, in this embodiment, by injecting a protective gas from the inside of the second main clamper 220b through the second gas injection member 330b, the welding spatter generated by laser welding is scattered outward to prevent splashing on the welding part. Can play a role.

Meanwhile, the second main clamper 220b may be formed so that a part of the outer peripheral surface of the lower side that is open is pierced. That is, as shown in FIG. 2A, when welding is performed while the second main clamper 220b pressurizes and fixes the welding portion, the welding gas remaining in the clamper may be discharged to the pierced outer circumferential portion of the second main clamper 220b. There is.

In addition, since the protective gas is also discharged through the open outer circumferential portion, the generation of new impurity gas due to the mixing of the welding gas and the protective gas can be prevented.

Referring to FIG. 6B, the protective gas injection unit may further include a cylindrical gas penetrating portion 340 formed to surround the second gas injection member 330b.

The gas penetrating portion 340 may be provided with a plurality of holes for penetrating the protective gas along the outer circumferential surface. Accordingly, the protective gas injected by the second gas injection member 330b passes through the hole provided in the gas penetrating part 340 to block oxygen flowing into the circular welding part.

Accordingly, according to embodiments of the present invention, the protective gas injection means for blocking oxygen at the welding site is integrally coupled to the clamper of the welding jig, thereby obstructing the scanning path of the laser generated as the protective gas injection means is provided separately. Or, it is possible to solve a problem such as obstruction of the movement path of the jig.

In addition, according to embodiments of the present invention, by forming an exhaust means for discharging the protective gas in the clamper and the locator of the jig, impurity gas or spatter generated during welding may be scattered to the outside.

Although the specific embodiments according to the present invention have been described so far, various modifications are possible without departing from the scope of the present invention. Therefore, the scope of the present invention should not be defined by being limited to the described embodiments, and should be defined not only by the claims to be described later, but also by the claims and their equivalents.

As described above, although the present invention has been described by the limited embodiments and drawings, the present invention is not limited to the above embodiments, which is various modifications and variations from these descriptions to those of ordinary skill in the field to which the present invention belongs. Transformation is possible. Accordingly, the idea of the present invention should be grasped only by the scope of the claims set forth below, and all equivalent or equivalent modifications thereof will be said to belong to the scope of the idea of the present invention.

T: object to be welded
1: laser welding jig device
10: base frame
20: working rod
100: locator
110: first locator
115: first exhaust part
120: second locator
200: jig unit
210a: support frame
220a: first main clamper
220b: second main clamper
230: second exhaust part
240: sub clamper
310: gas transfer pipe
320: gas injection block
330a: first gas injection member
330b: second gas injection member
340: gas penetration part

Claims (13)

A base frame installed on the floor of the workshop;
A locator provided on the base frame and on which a welding object is seated;
A jig unit coupled to the base frame and moving up and down and pressing and fixing the welding object; And
A protective gas injection unit that is integrally combined with the jig unit and injects a protective gas toward the welding part of the welding object
Jig device for laser welding comprising a.
The method of claim 1,
The locator is
A jig device for laser welding, comprising: a first locator having an open upper portion and an empty space therein, and having both sides of the open upper portion facing each other.
The method of claim 2,
A jig apparatus for laser welding, characterized in that a first exhaust part corresponding to a plurality of holes perforated along a length direction is formed on an upper portion of the first locator.
The method of claim 2,
The locator is
A jig device for laser welding, comprising: a second locator of a cylindrical shape formed with an empty space therein while the upper portion is open.
The method of claim 1,
The jig unit is
A support frame coupled to an upper portion of the base frame; And
A first main clamper mounted on the support frame and formed with an empty space inside with the lower side open
A jig device for laser welding, comprising: a.
The method of claim 5,
The first main clamper is
A jig device for laser welding, characterized in that the two side surfaces of the open lower part are implemented to face each other, and a second exhaust part corresponding to a plurality of holes perforated along a length direction is formed in the lower part of both side surfaces.
The method of claim 5,
The protective gas injection part is formed integrally with the first main clamper,
A gas moving pipe installed on the support frame and having one end connected to a gas supply source;
A gas injection block coupled to the other end of the gas transfer pipe and passing through the support frame in a vertical direction; And
A first gas injection member that is coupled to a lower portion of the penetrating gas block and injects a protective gas into an empty space of the first main clamper
A jig device for laser welding, comprising: a.
The method of claim 7,
A jig device for laser welding, characterized in that at least one of the front and the rear of the first main clamper is opened.
The method of claim 8,
The first gas injection member
A jig apparatus for laser welding, characterized in that it is a nozzle shape having a predetermined length and is bent toward an open space of the first main clamper.
The method of claim 1,
The jig unit is
A support frame coupled to an upper portion of the base frame; And
A second main clamper of a cylindrical shape that is mounted on the support frame and has an empty space inside with the lower side open
A jig device for laser welding, comprising: a.
The method of claim 1,
The method of claim 10,
The protective gas injection part is formed integrally with the second main clamper,
A gas moving pipe installed on the support frame and having one end connected to a gas supply source;
A gas injection block coupled to the other end of the gas transfer pipe and passing through the support frame in a vertical direction; And
A second gas injection member coupled to a lower portion of the penetrating gas block and injecting a protective gas into an empty space of the second main clamper
A jig device for laser welding, comprising: a.
The method of claim 1,
The method of claim 11,
A gas penetrating portion having a cylindrical shape surrounding the second gas injection member and having a plurality of holes for penetrating the protective gas along an outer circumferential surface
Laser welding jig device, characterized in that it further comprises.
The method of claim 1,
An operating rod is fixed and installed outside of the base frame,
A jig device for laser welding, characterized in that it further comprises a sub-clamper hinged to an upper end of the operation rod to further pressurize and fix the welding object.

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