KR101351490B1 - Jig Unit of Welding Device for Sheet - Google Patents

Abstract

The present invention relates to a fixed jig unit of a thin plate welding apparatus that can improve the reliability of welding by bringing the welded material closer to each other, and according to an embodiment of the present invention, a welded material in which a plurality of welded materials are laminated is supported. It is provided so as to support, the supporter portion for generating a magnetic force according to the supply of the current, the to-be-welded object placed on the supporter portion is fixed by pressing the supporter portion side, by being magnetized by the magnetic force of the supporter portion is pressed against the supporter portion side There is provided a fixing jig unit for a thin plate welding apparatus including a press part made of a magnetic material such that the welded material of the welding material is in close contact with each other.

Description

Jig Unit of Welding Device for Sheet Welding Device

The present invention relates to a fixing jig unit of a thin plate welding apparatus, and more particularly, to a fixing jig unit of a thin plate welding apparatus which can improve the reliability of welding by bringing the welded material into close contact.

Laser processing apparatuses are used in various fields such as cutting, grooving and marking objects as well as welding metals.

In particular, laser welding is used when joining dissimilar metals, when the metal to be joined has heat-sensitive properties, when joining materials requiring vacuum welding in a non-vacuum state, when welding inaccessible areas, etc. It is an efficient welding method that can be applied.

Recently, with the development of electric vehicles and the like, the application of laser welding has been attempted to configure the module of the secondary battery as a power source.

The unit cell of the secondary battery includes a positive electrode plate as a positive electrode current collector coated with a positive electrode active material, a negative electrode plate as a negative electrode current collector coated with a negative electrode active material, and a separator inserted between the positive electrode plate and the negative electrode plate. The electrode assembly consisting of the positive electrode plate, the negative electrode plate, and the cerapater is housed in a pouch and sealed.

Batteries applied to electric vehicles and the like are high-power and large-capacity batteries, which are used by electrically connecting a plurality of secondary battery unit cells. That is, for example, a battery module is configured by arranging a plurality of secondary battery unit cells in a case of a hexahedron and electrically connecting parallel or series thin electrode tabs extending from the positive and negative plates of each unit cell. .

In order to configure a large capacity secondary battery module as described above, as shown in FIG. 1, welding is performed after stacking a plurality of electrode tabs 12. In this case, laser (L) welding may be applied.

By the way, in the welding of the laminated thin plate, the closet between the welding material to be welded is very important, if after welding a plurality of the welded material is laminated on the plane without being adhered properly as shown in Figure 2 Similarly, the space 5 may be generated between the welded materials 12, and if the adhesion is not performed, melting between the welded materials may not occur evenly, resulting in deterioration of welding quality such as humping phenomenon. Can be.

Korea Patent Publication 10-2011-0103115

The present invention is to solve the above problems, in the welding of a thin plate, when fixing the welded material to be welded, to provide a fixing jig unit of the thin plate welding apparatus that can be more closely contact between the welded material. Shall be.

In order to solve the above problems, according to an embodiment of the present invention, a supporter unit is provided to support a welded object in which a plurality of welded materials are stacked, and generates a magnetic force according to whether current is supplied to the supporter unit. The press-fitted part to be pressed is fixed to the supporter part side, and is fixed by the magnetic force of the supporter part to be pressed to the supporter part side. Jig unit is provided.

The supporter part may include an electromagnet for generating a magnetic force according to the flow of current, provided on the outside of the electromagnet to protect the electromagnet and made of a magnetic material.

The supporter unit may further include a controller for controlling whether the current supplied to the electromagnet is supplied and the size thereof.

When the supporter part is magnetized, the press part is pulled to the supporter part side by magnetic force, so that the presser part is pressed toward the supporter side to closely adhere the material to be welded.

Alternatively, when the supporter part is magnetized, the supporter part is pulled toward the press part side by a magnetic force, so that the supporter part is pressed toward the press part side to closely adhere the material to be welded.

The supporter part includes a first supporter and a second supporter provided at positions spaced apart from each other, and the press part comprises: a first press for pressing the welded object toward the first supporter side, and the first press; It is provided at a predetermined position, it may comprise a second press for pressing the welded object to the second supporter side.

The first supporter and the second supporter may be spaced apart by the width of the welded portion of the welded material such that the welded portion of the welded material is positioned between the first supporter and the second supporter.

On the other hand, a portion located between the first supporter and the first press and the second supporter and the second press of the welded object fixed by the supporter part and the press part is bent toward the supporter part side or the press part side, so that the welded material is In order to be in close contact with each other, the first press is provided at a position spaced apart from the point at which the first supporter is positioned to the second supporter side or the opposite side thereof, and the second press is located at a position at which the second supporter is positioned. It may be provided at a position spaced apart in the first supporter side or the opposite direction.

Between the spaced apart from the first supporter and the second supporter, a hole through which foreign matter generated by welding may be formed.

Between the first supporter and the second supporter spaced apart, the injection means for injecting a protective gas for protecting the welding portion of the welded object may be provided.

Between the first supporter and the second supporter spaced apart, the photographing means for monitoring the welded portion of the welded object may be provided.

According to the fixing jig unit of the thin plate welding apparatus of the present invention, when performing laser welding, there are the following effects.

First, since the supporter part and the press part are pressed by the magnetic field of the electromagnet, the welded materials can be in close contact with each other, thereby improving the reliability of welding.

Second, it is possible to adjust the strength of the magnetic field to be in close contact with the material to be welded can be adjusted to the optimum pressure varies depending on the material or thickness of the material to be welded to improve the reliability of the welding.

Third, the welded material can be brought into close contact by bending the welded portion, thereby improving the reliability of welding.

1 is a view showing a state in which a welding laser is irradiated in a state where a plurality of electrode tabs are overlapped;
2 is a view showing a state in which spaces between welded materials stacked on each other are generated;
3 is a view showing one embodiment of a fixing jig unit of the thin plate welding apparatus of the present invention;
4 is a view showing another form of the fixing jig unit of the thin plate welding apparatus of the present invention;
FIG. 5 is a side view showing the gas injection means of FIG. 4; FIG.
6 is a view showing another form of the fixing jig unit of the thin plate welding apparatus of the present invention;
7 is a view showing a state in which the welded object is curved by the fixing jig unit of the thin plate welding apparatus of FIG.

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.

In addition, the fixing jig unit of the thin plate welding apparatus of the present invention will be described with an example applied to the laser welding apparatus. However, the present invention is not necessarily limited thereto, and any of the fixing units of the welding device for welding the thin plate can be applied.

The fixing unit of the thin plate welding apparatus of the present embodiment, as shown in FIG. 3, may include a supporter part 120 and a press part 110.

The supporter part 120 is provided to support the to-be-welded object 10 and is a component provided to generate a magnetic force according to whether current is supplied.

Here, the to-be-welded object 10 is the thing by which the several to-be-welded material 12 was laminated | stacked, and the electrode plate of a secondary battery is mentioned as an example. That is, the plurality of welded materials 12 stacked as described above may be welded to each other, and the welded object 10 having the plurality of welded materials 12 in the stacked state as a unit is It can also be welded by the other to-be-welded object 10 and the laser L. FIG.

In addition, the press unit 110 is a component for pressing and fixing the workpiece 10 placed on the supporter unit 120 toward the supporter unit 120.

To this end, although not shown in the drawing, the supporter part 120 is moved by a separate driving means (not shown) for moving the supporter part 120 toward and away from the press part 110. It may be provided to be moved.

The driving means (not shown) may be driven by a hydraulic device (not shown) or a motor (not shown) and a gear (not shown).

On the other hand, the press unit 110 is magnetized by the magnetic force generated in the supporter unit 120 is pulled by the magnetic force to the supporter unit 120 side, the welded object located between the supporter unit 120 ( 10 may be pressed to closely contact the plurality of welded materials 12 constituting the welded object 10.

To this end, the press unit 110 may be made of a material of a ferromagnetic material or a top crystal body magnetized by a magnetic force, for example, iron or nickel.

The supporter 120 as described above may include an electromagnet 122 and a protective layer 124.

The electromagnet 122 generates a magnetic force according to whether the current is applied, and the protective layer 124 may be a component that surrounds the outside of the electromagnet 122 to protect the electromagnet 122 and withstands substantial pressure. . In addition, the protective layer 124 may be made of a magnetic material exhibiting magnetism by the magnetic force of the electromagnet 122.

In addition, the controller 140 may be provided to control a current applied to the electromagnet 122. The controller 140 may control whether the electric current is applied to the electromagnet 122, and may also adjust the intensity of the electric current applied to the electromagnet 122. When the intensity of the current applied to the electromagnet 122 is adjusted, the magnitude of the magnetic force generated by the electromagnet 122 may also be controlled.

That is, the pressure required for close contact may vary according to the number, thickness, material, and welding method of the welded material 12 constituting the welded object 10, wherein the controller 140 is applied to the electromagnet 122. By adjusting the strength of the current, it is possible to control the pressure for pressing the object 10. In addition, it is possible to control the pressure more precisely as compared with the method of being in close contact using a hydraulic device (not shown), a motor (not shown).

On the other hand, when the supporter unit 120 is magnetized, the press unit 110 may be moved toward the supporter unit 120 by the magnetic force, or the supporter unit 120 may be moved to the press unit 110. It may be moved to the side. Of course, both sides of the press unit 110 and the supporter unit 120 may be moved to the opposite side.

To this end, the supporter unit 120 or the press unit 110 may be made to be movable by a magnetic force. Of course, both the supporter 120 and the press unit 110 may be made movable. At this time, the distance that the supporter 120 and the press unit 110 is moved by the magnetic force may be about the thickness of the object to be welded (10), the present invention may be larger or smaller than the supporter unit 120 and The press unit 110 is not limited to the distance moved by the magnetic force.

In addition, the welded object 10 may be pressed and pressed by the press unit 110 according to the magnetization of the supporter 120. In addition, when the material of the welded object 10 is a magnetic material, the welded object 10 may be used. It may also be in close contact with the supporter unit 120 by a magnetic force. In this case, a scratch or the like occurring on the surface of the to-be-welded object 10 may be prevented when excessively pressed by a press or the like for close contact with the to-be-welded material 10.

Therefore, after placing the to-be-welded object 10 to be welded between the press part 110 and the supporter part 120, the press part 110 is moved toward the supporter part 120 to be welded 10. ) Is first fixed between the press unit 110 and the supporter unit 120, and a current is applied to the electromagnet so that the press unit 110 and the supporter unit 120 as the magnetic force are the welded object 10. ) Can be pressed.

Meanwhile, the press unit 110 and the supporter unit 120 may be formed of one press and a supporter, respectively, or may be formed of a plurality of presses and supporters.

4 is a diagram illustrating an example in which the press unit 110 and the supporter unit 120 are formed of a plurality of presses and supporters, respectively.

As shown in FIG. 4, the press unit 110 may include a first press 116 and a second press 118, and the supporter unit 120 may also include a first supporter 126 and a second supporter. 128. The first supporter 126 and the second supporter 128 may be formed of the electromagnet 122 and the protective layer 124 described above, respectively.

The first supporter 126 and the second supporter 128 may be spaced apart from each other. At this time, the first supporter 126 and the second supporter 128 may be spaced apart at a wider interval than the width of the portion where the welded object is welded. In addition, between the first supporter 126 and the second supporter 128, the welded portion of the welded object 10 is spaced apart from each other while the first supporter 126 and the second supporter 128 are spaced apart from each other. Can be located.

In addition, the first press 116 and the second press 118 may also be spaced apart as the first supporter 126 and the second supporter 128 are spaced apart from each other. The laser (L) for welding may be irradiated onto the welded object 10 between the first press 116 and the second press 118.

In addition, a hole 150 may be formed at a lower side between the first supporter 126 and the second supporter 128. An oxide such as a spatter may be scattered during laser welding of the welded object 10, and these foreign substances may be discharged to the outside of the space where the welding is performed through the hole 150.

Alternatively, the gas injection means 160 illustrated in FIGS. 4 and 5 may be provided between the first supporter 126 and the second supporter 128. The gas injection means 160 may include a pipe 162 for supplying gas and a nozzle 164 for ejecting gas to the welded portion of the welded object. In addition, the gas injected from the gas injection means 160 may be sprayed with a protective gas such as nitrogen or argon to protect the welding site, or a cooling gas for adjusting the cooling rate of the welding site.

Alternatively, the photographing means 170 may be provided between the first supporter 126 and the second supporter 128 spaced apart from each other. The photographing means 170 includes a light source 172 for irradiating light to the welded portion of the welded object 10 and a camera 174 for photographing the welded portion of the welded object 10. The welding site can be continuously monitored during the welding operation of (10). Of course, although not shown in the drawings, a monitor (not shown) for displaying the captured image may be further provided.

On the other hand, when the part to be welded 10 is bent in one direction than the flat portion, the plurality of welded members 12 constituting the welded object 10 may be in close contact with each other.

The direction in which the to-be-welded object 10 is curved is not particularly limited, but in the present embodiment, the curved portion toward the press part 110 side or the supporter part 120 will be described as an example. 6 to 7 are diagrams illustrating that the to-be-welded object 10 is curved toward the press part 110.

In order to bend the to-be-welded object 10, the first press 116 is provided at a position spaced apart from the point where the first supporter 126 is positioned to the opposite side of the second supporter 128 side, and The second press 118 may be provided at a position spaced in a direction opposite to the side of the first supporter 126 from the point where the second supporter 128 is located.

Of course, contrary to the above, the first press 116 is provided at a position spaced apart from the point where the first supporter 126 is located to the second supporter 128 side, the second press 118 is The second supporter 128 may be provided at a position spaced apart from the position where the second supporter 128 is located.

Therefore, the point where the supporter part 120 and the press part 110 come into contact with the to-be-welded object 10 is changed so that the to-be-welded material 10 is curved, and accordingly, the plurality of the to-be-welded material 10 The welded material 12 of the hawk can be tightly adhered. In this case, the degree of curvature may be a degree of curvature within the elastic limit of the welded object 10.

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 are to be considered as illustrative rather than restrictive, and the present invention is not limited to the above description, but may be modified within the scope of the appended claims and equivalents thereof.

110: press part 116: first press
118: second press 120: supporter
122: electromagnet 124: protective layer
126: first supporter 128: second supporter
140: control unit 150: hall
160: gas injection means 162: tube
164: nozzle 170: photographing means
172: light source 174: camera

Claims (11)

A supporter unit provided to support the welded object in which a plurality of welded materials are stacked, and generating magnetic force according to whether current is supplied;
A press part made of a magnetic material to press and fix the welded object placed on the supporter to the supporter part, and to be pressed against the supporter part by magnetizing by the magnetic force of the supporter part such that the welded material of the welded object is in close contact with each other;
Lt; / RTI >
Wherein the supporter section comprises:
Each of which includes an electromagnet and a protective layer, and includes a first supporter and a second supporter provided at positions spaced apart from each other.
The press unit,
A first press for pressing the welded object to the first supporter side, and a second press provided at a position spaced apart from the first press to pressurize the welded object to the second supporter side,
A portion located between the first supporter and the first press and the second supporter and the second press of the welded object fixed by the supporter part and the press part is bent toward the supporter part side or the press part side, and the welded material is in close contact with each other. Preferably,
The first press is provided at a position spaced apart from the point where the first supporter is located to the second supporter side or the opposite side thereof,
The second press is provided at a position spaced apart from the point where the second supporter is located in the first supporter side or the opposite direction,
Fixing jig unit of the thin plate welding apparatus is formed between the spaced apart between the first supporter and the second supporter, a hole for discharging foreign matter generated by the welding. The method of claim 1,
Wherein the supporter section comprises:
An electromagnet generating magnetic force in accordance with the flow of electric current;
A protective layer provided on an outer side of the electromagnet to protect the electromagnet and made of a magnetic material;
Fixing jig unit of a thin plate welding apparatus comprising a. 3. The method of claim 2,
Wherein the supporter section comprises:
Fixing jig unit of the thin-plate welding apparatus further comprises a control unit for controlling the supply and size of the current supplied to the electromagnet. The method of claim 1,
When the supporter portion is magnetized,
The press jig unit is pulled toward the supporter part side by magnetic force, and is pressed to the supporter part side to hold the welded member of the welded object to closely adhere to each other. The method of claim 1,
When the supporter portion is magnetized,
The holding jig unit of the thin-plate welding apparatus which the said supporter part is pulled to the said press part side by magnetic force, and is pressed to the said press part side, and the to-be-welded material of the to-be-welded object adhere | attaches mutually. delete delete delete delete The method of claim 1,
Between the spaced apart of the first supporter and the second supporter,
Fixing jig unit of the thin plate welding apparatus is provided with a spray means for injecting gas to the welded portion of the welded object. The method of claim 1,
Between the spaced apart of the first supporter and the second supporter,
Fixing jig unit of the thin plate welding apparatus is provided with a photographing means for monitoring the welded portion of the welded object.

Images